Initial commit: .NET MAUI Linux Platform

Complete Linux platform implementation for .NET MAUI with:

- 35+ Skia-rendered controls (Button, Label, Entry, CarouselView, etc.)
- Platform services (Clipboard, FilePicker, Notifications, DragDrop, etc.)
- Accessibility support (AT-SPI2, High Contrast)
- HiDPI and Input Method support
- 216 unit tests
- CI/CD workflows
- Project templates
- Documentation

🤖 Generated with Claude Code
This commit is contained in:
logikonline 2025-12-19 09:30:16 +00:00
commit d87124fef2
138 changed files with 32939 additions and 0 deletions

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# Dependabot configuration for automatic dependency updates
version: 2
updates:
# NuGet packages
- package-ecosystem: "nuget"
directory: "/"
schedule:
interval: "weekly"
open-pull-requests-limit: 5
groups:
microsoft-maui:
patterns:
- "Microsoft.Maui*"
skiasharp:
patterns:
- "SkiaSharp*"
- "HarfBuzzSharp*"
testing:
patterns:
- "xunit*"
- "Moq*"
- "FluentAssertions*"
- "coverlet*"
- "Microsoft.NET.Test.Sdk"
# GitHub Actions
- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "weekly"
open-pull-requests-limit: 3

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# .NET MAUI Linux Platform CI/CD Pipeline
name: CI
on:
push:
branches: [ main, develop ]
pull_request:
branches: [ main ]
workflow_dispatch:
env:
DOTNET_VERSION: '9.0.x'
DOTNET_NOLOGO: true
DOTNET_CLI_TELEMETRY_OPTOUT: true
jobs:
build:
name: Build and Test
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Setup .NET
uses: actions/setup-dotnet@v4
with:
dotnet-version: ${{ env.DOTNET_VERSION }}
- name: Install Linux dependencies
run: |
sudo apt-get update
sudo apt-get install -y libx11-dev libxrandr-dev libxcursor-dev libxi-dev libgl1-mesa-dev
- name: Restore dependencies
run: dotnet restore
- name: Build
run: dotnet build --configuration Release --no-restore
- name: Run tests
run: dotnet test --configuration Release --no-build --verbosity normal --logger "trx;LogFileName=test-results.trx"
- name: Upload test results
uses: actions/upload-artifact@v4
if: always()
with:
name: test-results
path: '**/TestResults/*.trx'
- name: Upload build artifacts
uses: actions/upload-artifact@v4
with:
name: build-artifacts
path: |
**/bin/Release/**/*.dll
**/bin/Release/**/*.xml
pack:
name: Create NuGet Package
runs-on: ubuntu-latest
needs: build
if: github.ref == 'refs/heads/main' || github.event_name == 'workflow_dispatch'
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Setup .NET
uses: actions/setup-dotnet@v4
with:
dotnet-version: ${{ env.DOTNET_VERSION }}
- name: Install Linux dependencies
run: |
sudo apt-get update
sudo apt-get install -y libx11-dev libxrandr-dev libxcursor-dev libxi-dev libgl1-mesa-dev
- name: Restore dependencies
run: dotnet restore
- name: Pack NuGet package
run: dotnet pack --configuration Release --no-restore -o ./nupkg
- name: Upload NuGet package
uses: actions/upload-artifact@v4
with:
name: nuget-package
path: ./nupkg/*.nupkg
code-quality:
name: Code Quality
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Setup .NET
uses: actions/setup-dotnet@v4
with:
dotnet-version: ${{ env.DOTNET_VERSION }}
- name: Install Linux dependencies
run: |
sudo apt-get update
sudo apt-get install -y libx11-dev libxrandr-dev libxcursor-dev libxi-dev libgl1-mesa-dev
- name: Restore dependencies
run: dotnet restore
- name: Build with warnings as errors
run: dotnet build --configuration Release --no-restore /warnaserror
continue-on-error: true
- name: Format check
run: dotnet format --verify-no-changes --verbosity diagnostic
continue-on-error: true

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# Release workflow for publishing NuGet packages
name: Release
on:
release:
types: [published]
workflow_dispatch:
inputs:
version:
description: 'Package version (e.g., 1.0.0-preview.5)'
required: true
type: string
env:
DOTNET_VERSION: '9.0.x'
DOTNET_NOLOGO: true
DOTNET_CLI_TELEMETRY_OPTOUT: true
jobs:
release:
name: Build and Publish
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Setup .NET
uses: actions/setup-dotnet@v4
with:
dotnet-version: ${{ env.DOTNET_VERSION }}
- name: Install Linux dependencies
run: |
sudo apt-get update
sudo apt-get install -y libx11-dev libxrandr-dev libxcursor-dev libxi-dev libgl1-mesa-dev
- name: Determine version
id: version
run: |
if [ "${{ github.event_name }}" = "release" ]; then
VERSION="${{ github.event.release.tag_name }}"
VERSION="${VERSION#v}" # Remove 'v' prefix if present
else
VERSION="${{ inputs.version }}"
fi
echo "version=$VERSION" >> $GITHUB_OUTPUT
echo "Using version: $VERSION"
- name: Restore dependencies
run: dotnet restore
- name: Build
run: dotnet build --configuration Release --no-restore
- name: Run tests
run: dotnet test --configuration Release --no-build --verbosity normal
- name: Pack NuGet package
run: dotnet pack --configuration Release --no-build -o ./nupkg /p:PackageVersion=${{ steps.version.outputs.version }}
- name: Upload NuGet package artifact
uses: actions/upload-artifact@v4
with:
name: nuget-package-${{ steps.version.outputs.version }}
path: ./nupkg/*.nupkg
- name: Publish to NuGet.org
if: github.event_name == 'release'
run: |
dotnet nuget push ./nupkg/*.nupkg \
--api-key ${{ secrets.NUGET_API_KEY }} \
--source https://api.nuget.org/v3/index.json \
--skip-duplicate
env:
NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
- name: Attach packages to release
if: github.event_name == 'release'
uses: softprops/action-gh-release@v1
with:
files: ./nupkg/*.nupkg
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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# Build results
[Dd]ebug/
[Dd]ebugPublic/
[Rr]elease/
[Rr]eleases/
x64/
x86/
bld/
[Bb]in/
[Oo]bj/
[Ll]og/
[Ll]ogs/
# Visual Studio
.vs/
*.suo
*.user
*.userosscache
*.sln.docstates
# Rider
.idea/
*.sln.iml
# VS Code
.vscode/
# NuGet Packages
*.nupkg
*.snupkg
packages/
# Test Results
[Tt]est[Rr]esult*/
*.coverage
coverage*.xml
# Temporary files
*.tmp
*.temp
*.swp
*~
# macOS
.DS_Store
._*
# Publish output
publish/

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# Contributing to .NET MAUI Linux Platform
Thank you for your interest in contributing to the .NET MAUI Linux Platform! This document provides guidelines and information for contributors.
## Code of Conduct
This project follows the [.NET Foundation Code of Conduct](https://dotnetfoundation.org/code-of-conduct). By participating, you are expected to uphold this code.
## Getting Started
### Prerequisites
- .NET 9.0 SDK
- Linux development environment (Ubuntu 22.04+ recommended)
- Git
### Setting Up the Development Environment
1. Fork and clone the repository:
```bash
git clone https://github.com/your-username/maui-linux.git
cd maui-linux
```
2. Install dependencies:
```bash
# Ubuntu/Debian
sudo apt-get install libx11-dev libxrandr-dev libxcursor-dev libxi-dev libgl1-mesa-dev
# Fedora
sudo dnf install libX11-devel libXrandr-devel libXcursor-devel libXi-devel mesa-libGL-devel
```
3. Build the project:
```bash
dotnet build
```
4. Run tests:
```bash
dotnet test
```
## How to Contribute
### Reporting Bugs
- Check if the bug has already been reported in [Issues](https://github.com/anthropics/maui-linux/issues)
- Use the bug report template
- Include reproduction steps, expected behavior, and actual behavior
- Include system information (distro, .NET version, desktop environment)
### Suggesting Features
- Check existing feature requests first
- Use the feature request template
- Explain the use case and benefits
### Pull Requests
1. Create a branch from `main`:
```bash
git checkout -b feature/your-feature-name
```
2. Make your changes following the coding guidelines
3. Add or update tests as needed
4. Ensure all tests pass:
```bash
dotnet test
```
5. Commit your changes:
```bash
git commit -m "Add feature: description"
```
6. Push and create a pull request
## Coding Guidelines
### Code Style
- Use C# 12 features where appropriate
- Follow [.NET naming conventions](https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions)
- Use `var` for obvious types
- Prefer expression-bodied members for simple methods
- Use nullable reference types
### File Organization
```
Views/ # Skia-rendered view implementations
Skia*.cs # View classes (SkiaButton, SkiaLabel, etc.)
Handlers/ # MAUI handler implementations
*Handler.cs # Platform handlers
Services/ # Platform services
*Service.cs # Service implementations
Rendering/ # Rendering infrastructure
*.cs # Rendering helpers and caches
tests/ # Unit tests
Views/ # View tests
Services/ # Service tests
```
### Naming Conventions
- Views: `Skia{ControlName}` (e.g., `SkiaButton`, `SkiaCarouselView`)
- Handlers: `{ControlName}Handler` (e.g., `ButtonHandler`)
- Services: `{Feature}Service` (e.g., `ClipboardService`)
- Tests: `{ClassName}Tests` (e.g., `SkiaButtonTests`)
### Documentation
- Add XML documentation to public APIs
- Update README and docs for new features
- Include code examples where helpful
Example:
```csharp
/// <summary>
/// A horizontally scrolling carousel view with snap-to-item behavior.
/// </summary>
public class SkiaCarouselView : SkiaLayoutView
{
/// <summary>
/// Gets or sets the current position (0-based index).
/// </summary>
public int Position { get; set; }
}
```
### Testing
- Write unit tests for new functionality
- Maintain test coverage above 80%
- Use descriptive test names: `MethodName_Condition_ExpectedResult`
Example:
```csharp
[Fact]
public void Position_WhenSetToValidValue_UpdatesPosition()
{
var carousel = new SkiaCarouselView();
carousel.AddItem(new SkiaLabel());
carousel.Position = 0;
Assert.Equal(0, carousel.Position);
}
```
## Architecture Overview
### Rendering Pipeline
1. `LinuxApplication` creates the main window
2. `SkiaRenderingEngine` manages the render loop
3. Views implement `Draw(SKCanvas canvas)` for rendering
4. `DirtyRectManager` optimizes partial redraws
### View Hierarchy
```
SkiaView (base class)
├── SkiaLayoutView (containers)
│ ├── SkiaStackLayout
│ ├── SkiaScrollView
│ └── SkiaCarouselView
└── Control views
├── SkiaButton
├── SkiaLabel
└── SkiaEntry
```
### Handler Pattern
Handlers connect MAUI virtual views to platform-specific implementations:
```csharp
public class ButtonHandler : ViewHandler<IButton, SkiaButton>
{
public static void MapText(ButtonHandler handler, IButton button)
{
handler.PlatformView.Text = button.Text;
}
}
```
## Development Workflow
### Branch Naming
- `feature/` - New features
- `fix/` - Bug fixes
- `docs/` - Documentation updates
- `refactor/` - Code refactoring
- `test/` - Test additions/fixes
### Commit Messages
Follow conventional commits:
- `feat:` - New feature
- `fix:` - Bug fix
- `docs:` - Documentation
- `test:` - Tests
- `refactor:` - Code refactoring
- `chore:` - Maintenance
### Pull Request Checklist
- [ ] Code follows style guidelines
- [ ] Tests added/updated
- [ ] Documentation updated
- [ ] All tests pass
- [ ] No breaking changes (or documented if unavoidable)
## Areas for Contribution
### High Priority
- Additional control implementations
- Accessibility improvements (AT-SPI2)
- Performance optimizations
- Wayland support improvements
### Good First Issues
Look for issues labeled `good-first-issue` for beginner-friendly tasks.
### Documentation
- API documentation improvements
- Tutorials and guides
- Sample applications
## Getting Help
- Open a [Discussion](https://github.com/anthropics/maui-linux/discussions) for questions
- Join the .NET community on Discord
- Check existing issues and discussions
## License
By contributing, you agree that your contributions will be licensed under the MIT License.
---
Thank you for contributing to .NET MAUI on Linux!

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Graphics;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Extension methods for color conversions between MAUI and SkiaSharp.
/// </summary>
public static class ColorExtensions
{
/// <summary>
/// Converts a MAUI Color to an SKColor.
/// </summary>
public static SKColor ToSKColor(this Color color)
{
if (color == null)
return SKColors.Transparent;
return new SKColor(
(byte)(color.Red * 255),
(byte)(color.Green * 255),
(byte)(color.Blue * 255),
(byte)(color.Alpha * 255));
}
/// <summary>
/// Converts an SKColor to a MAUI Color.
/// </summary>
public static Color ToMauiColor(this SKColor color)
{
return new Color(
color.Red / 255f,
color.Green / 255f,
color.Blue / 255f,
color.Alpha / 255f);
}
/// <summary>
/// Creates a new SKColor with the specified alpha value.
/// </summary>
public static SKColor WithAlpha(this SKColor color, byte alpha)
{
return new SKColor(color.Red, color.Green, color.Blue, alpha);
}
/// <summary>
/// Creates a lighter version of the color.
/// </summary>
public static SKColor Lighter(this SKColor color, float factor = 0.2f)
{
return new SKColor(
(byte)Math.Min(255, color.Red + (255 - color.Red) * factor),
(byte)Math.Min(255, color.Green + (255 - color.Green) * factor),
(byte)Math.Min(255, color.Blue + (255 - color.Blue) * factor),
color.Alpha);
}
/// <summary>
/// Creates a darker version of the color.
/// </summary>
public static SKColor Darker(this SKColor color, float factor = 0.2f)
{
return new SKColor(
(byte)(color.Red * (1 - factor)),
(byte)(color.Green * (1 - factor)),
(byte)(color.Blue * (1 - factor)),
color.Alpha);
}
/// <summary>
/// Gets the luminance of the color.
/// </summary>
public static float GetLuminance(this SKColor color)
{
return 0.299f * color.Red / 255f +
0.587f * color.Green / 255f +
0.114f * color.Blue / 255f;
}
/// <summary>
/// Determines if the color is considered light.
/// </summary>
public static bool IsLight(this SKColor color)
{
return color.GetLuminance() > 0.5f;
}
/// <summary>
/// Gets a contrasting color (black or white) for text on this background.
/// </summary>
public static SKColor GetContrastingColor(this SKColor backgroundColor)
{
return backgroundColor.IsLight() ? SKColors.Black : SKColors.White;
}
/// <summary>
/// Converts a MAUI Paint to an SKColor if possible.
/// </summary>
public static SKColor? ToSKColorOrNull(this Paint? paint)
{
if (paint is SolidPaint solidPaint && solidPaint.Color != null)
return solidPaint.Color.ToSKColor();
return null;
}
/// <summary>
/// Converts a MAUI Paint to an SKColor, using a default if not a solid color.
/// </summary>
public static SKColor ToSKColor(this Paint? paint, SKColor defaultColor)
{
return paint.ToSKColorOrNull() ?? defaultColor;
}
}
/// <summary>
/// Font extensions for converting MAUI fonts to SkiaSharp.
/// </summary>
public static class FontExtensions
{
/// <summary>
/// Gets the SKFontStyle from a MAUI Font.
/// </summary>
public static SKFontStyle ToSKFontStyle(this Font font)
{
// Map MAUI FontWeight (enum with numeric values) to SKFontStyleWeight
var weight = (int)font.Weight switch
{
100 => SKFontStyleWeight.Thin, // Thin
200 => SKFontStyleWeight.ExtraLight, // UltraLight
300 => SKFontStyleWeight.Light, // Light
400 => SKFontStyleWeight.Normal, // Regular
500 => SKFontStyleWeight.Medium, // Medium
600 => SKFontStyleWeight.SemiBold, // Semibold
700 => SKFontStyleWeight.Bold, // Bold
800 => SKFontStyleWeight.ExtraBold, // Heavy
900 => SKFontStyleWeight.Black, // Black
_ => font.Weight >= FontWeight.Bold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal
};
var slant = font.Slant switch
{
FontSlant.Italic => SKFontStyleSlant.Italic,
FontSlant.Oblique => SKFontStyleSlant.Oblique,
_ => SKFontStyleSlant.Upright
};
return new SKFontStyle(weight, SKFontStyleWidth.Normal, slant);
}
/// <summary>
/// Creates an SKFont from a MAUI Font.
/// </summary>
public static SKFont ToSKFont(this Font font, float defaultSize = 14f)
{
var size = font.Size > 0 ? (float)font.Size : defaultSize;
var typeface = SKTypeface.FromFamilyName(font.Family ?? "sans-serif", font.ToSKFontStyle());
return new SKFont(typeface, size);
}
}
/// <summary>
/// Thickness extensions for converting MAUI Thickness to SKRect.
/// </summary>
public static class ThicknessExtensions
{
/// <summary>
/// Converts a MAUI Thickness to an SKRect representing padding/margin.
/// </summary>
public static SKRect ToSKRect(this Thickness thickness)
{
return new SKRect(
(float)thickness.Left,
(float)thickness.Top,
(float)thickness.Right,
(float)thickness.Bottom);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for ActivityIndicator control.
/// </summary>
public partial class ActivityIndicatorHandler : ViewHandler<IActivityIndicator, SkiaActivityIndicator>
{
public static IPropertyMapper<IActivityIndicator, ActivityIndicatorHandler> Mapper = new PropertyMapper<IActivityIndicator, ActivityIndicatorHandler>(ViewHandler.ViewMapper)
{
[nameof(IActivityIndicator.IsRunning)] = MapIsRunning,
[nameof(IActivityIndicator.Color)] = MapColor,
[nameof(IView.IsEnabled)] = MapIsEnabled,
};
public static CommandMapper<IActivityIndicator, ActivityIndicatorHandler> CommandMapper = new(ViewHandler.ViewCommandMapper);
public ActivityIndicatorHandler() : base(Mapper, CommandMapper) { }
protected override SkiaActivityIndicator CreatePlatformView() => new SkiaActivityIndicator();
public static void MapIsRunning(ActivityIndicatorHandler handler, IActivityIndicator activityIndicator)
{
handler.PlatformView.IsRunning = activityIndicator.IsRunning;
}
public static void MapColor(ActivityIndicatorHandler handler, IActivityIndicator activityIndicator)
{
if (activityIndicator.Color != null)
handler.PlatformView.Color = activityIndicator.Color.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(ActivityIndicatorHandler handler, IActivityIndicator activityIndicator)
{
handler.PlatformView.IsEnabled = activityIndicator.IsEnabled;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for ActivityIndicator on Linux using Skia rendering.
/// Maps IActivityIndicator interface to SkiaActivityIndicator platform view.
/// </summary>
public partial class ActivityIndicatorHandler : ViewHandler<IActivityIndicator, SkiaActivityIndicator>
{
public static IPropertyMapper<IActivityIndicator, ActivityIndicatorHandler> Mapper = new PropertyMapper<IActivityIndicator, ActivityIndicatorHandler>(ViewHandler.ViewMapper)
{
[nameof(IActivityIndicator.IsRunning)] = MapIsRunning,
[nameof(IActivityIndicator.Color)] = MapColor,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IActivityIndicator, ActivityIndicatorHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ActivityIndicatorHandler() : base(Mapper, CommandMapper)
{
}
public ActivityIndicatorHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaActivityIndicator CreatePlatformView()
{
return new SkiaActivityIndicator();
}
public static void MapIsRunning(ActivityIndicatorHandler handler, IActivityIndicator activityIndicator)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsRunning = activityIndicator.IsRunning;
}
public static void MapColor(ActivityIndicatorHandler handler, IActivityIndicator activityIndicator)
{
if (handler.PlatformView is null) return;
if (activityIndicator.Color is not null)
handler.PlatformView.Color = activityIndicator.Color.ToSKColor();
}
public static void MapBackground(ActivityIndicatorHandler handler, IActivityIndicator activityIndicator)
{
if (handler.PlatformView is null) return;
if (activityIndicator.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Border on Linux using Skia rendering.
/// </summary>
public partial class BorderHandler : ViewHandler<IBorderView, SkiaBorder>
{
public static IPropertyMapper<IBorderView, BorderHandler> Mapper =
new PropertyMapper<IBorderView, BorderHandler>(ViewHandler.ViewMapper)
{
[nameof(IBorderView.Content)] = MapContent,
[nameof(IBorderStroke.Stroke)] = MapStroke,
[nameof(IBorderStroke.StrokeThickness)] = MapStrokeThickness,
[nameof(IView.Background)] = MapBackground,
[nameof(IPadding.Padding)] = MapPadding,
};
public static CommandMapper<IBorderView, BorderHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public BorderHandler() : base(Mapper, CommandMapper)
{
}
public BorderHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaBorder CreatePlatformView()
{
return new SkiaBorder();
}
protected override void ConnectHandler(SkiaBorder platformView)
{
base.ConnectHandler(platformView);
}
protected override void DisconnectHandler(SkiaBorder platformView)
{
base.DisconnectHandler(platformView);
}
public static void MapContent(BorderHandler handler, IBorderView border)
{
if (handler.PlatformView is null) return;
handler.PlatformView.ClearChildren();
if (border.PresentedContent?.Handler?.PlatformView is SkiaView skiaContent)
{
handler.PlatformView.AddChild(skiaContent);
}
}
public static void MapStroke(BorderHandler handler, IBorderView border)
{
if (handler.PlatformView is null) return;
if (border.Stroke is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.Stroke = solidPaint.Color.ToSKColor();
}
}
public static void MapStrokeThickness(BorderHandler handler, IBorderView border)
{
if (handler.PlatformView is null) return;
handler.PlatformView.StrokeThickness = (float)border.StrokeThickness;
}
public static void MapBackground(BorderHandler handler, IBorderView border)
{
if (handler.PlatformView is null) return;
if (border.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
public static void MapPadding(BorderHandler handler, IBorderView border)
{
if (handler.PlatformView is null) return;
var padding = border.Padding;
handler.PlatformView.PaddingLeft = (float)padding.Left;
handler.PlatformView.PaddingTop = (float)padding.Top;
handler.PlatformView.PaddingRight = (float)padding.Right;
handler.PlatformView.PaddingBottom = (float)padding.Bottom;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for Button control.
/// </summary>
public partial class ButtonHandler : ViewHandler<IButton, SkiaButton>
{
/// <summary>
/// Maps the property mapper for the handler.
/// </summary>
public static IPropertyMapper<IButton, ButtonHandler> Mapper = new PropertyMapper<IButton, ButtonHandler>(ViewHandler.ViewMapper)
{
[nameof(IButton.Text)] = MapText,
[nameof(IButton.TextColor)] = MapTextColor,
[nameof(IButton.Background)] = MapBackground,
[nameof(IButton.Font)] = MapFont,
[nameof(IButton.Padding)] = MapPadding,
[nameof(IButton.CornerRadius)] = MapCornerRadius,
[nameof(IButton.BorderColor)] = MapBorderColor,
[nameof(IButton.BorderWidth)] = MapBorderWidth,
[nameof(IView.IsEnabled)] = MapIsEnabled,
};
/// <summary>
/// Maps the command mapper for the handler.
/// </summary>
public static CommandMapper<IButton, ButtonHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ButtonHandler() : base(Mapper, CommandMapper)
{
}
public ButtonHandler(IPropertyMapper? mapper)
: base(mapper ?? Mapper, CommandMapper)
{
}
public ButtonHandler(IPropertyMapper? mapper, CommandMapper? commandMapper)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaButton CreatePlatformView()
{
var button = new SkiaButton();
return button;
}
protected override void ConnectHandler(SkiaButton platformView)
{
base.ConnectHandler(platformView);
platformView.Clicked += OnClicked;
platformView.Pressed += OnPressed;
platformView.Released += OnReleased;
}
protected override void DisconnectHandler(SkiaButton platformView)
{
platformView.Clicked -= OnClicked;
platformView.Pressed -= OnPressed;
platformView.Released -= OnReleased;
base.DisconnectHandler(platformView);
}
private void OnClicked(object? sender, EventArgs e)
{
VirtualView?.Clicked();
}
private void OnPressed(object? sender, EventArgs e)
{
VirtualView?.Pressed();
}
private void OnReleased(object? sender, EventArgs e)
{
VirtualView?.Released();
}
public static void MapText(ButtonHandler handler, IButton button)
{
handler.PlatformView.Text = button.Text ?? "";
handler.PlatformView.Invalidate();
}
public static void MapTextColor(ButtonHandler handler, IButton button)
{
if (button.TextColor != null)
{
handler.PlatformView.TextColor = button.TextColor.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapBackground(ButtonHandler handler, IButton button)
{
var background = button.Background;
if (background is SolidColorBrush solidBrush && solidBrush.Color != null)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapFont(ButtonHandler handler, IButton button)
{
var font = button.Font;
if (font.Family != null)
{
handler.PlatformView.FontFamily = font.Family;
}
handler.PlatformView.FontSize = (float)font.Size;
handler.PlatformView.IsBold = font.Weight == FontWeight.Bold;
handler.PlatformView.Invalidate();
}
public static void MapPadding(ButtonHandler handler, IButton button)
{
var padding = button.Padding;
handler.PlatformView.Padding = new SKRect(
(float)padding.Left,
(float)padding.Top,
(float)padding.Right,
(float)padding.Bottom);
handler.PlatformView.Invalidate();
}
public static void MapCornerRadius(ButtonHandler handler, IButton button)
{
handler.PlatformView.CornerRadius = button.CornerRadius;
handler.PlatformView.Invalidate();
}
public static void MapBorderColor(ButtonHandler handler, IButton button)
{
if (button.StrokeColor != null)
{
handler.PlatformView.BorderColor = button.StrokeColor.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapBorderWidth(ButtonHandler handler, IButton button)
{
handler.PlatformView.BorderWidth = (float)button.StrokeThickness;
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(ButtonHandler handler, IButton button)
{
handler.PlatformView.IsEnabled = button.IsEnabled;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Button on Linux using Skia rendering.
/// Maps IButton interface to SkiaButton platform view.
/// </summary>
public partial class ButtonHandler : ViewHandler<IButton, SkiaButton>
{
public static IPropertyMapper<IButton, ButtonHandler> Mapper = new PropertyMapper<IButton, ButtonHandler>(ViewHandler.ViewMapper)
{
[nameof(IButtonStroke.StrokeColor)] = MapStrokeColor,
[nameof(IButtonStroke.StrokeThickness)] = MapStrokeThickness,
[nameof(IButtonStroke.CornerRadius)] = MapCornerRadius,
[nameof(IView.Background)] = MapBackground,
[nameof(IPadding.Padding)] = MapPadding,
};
public static CommandMapper<IButton, ButtonHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ButtonHandler() : base(Mapper, CommandMapper)
{
}
public ButtonHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaButton CreatePlatformView()
{
var button = new SkiaButton();
return button;
}
protected override void ConnectHandler(SkiaButton platformView)
{
base.ConnectHandler(platformView);
platformView.Clicked += OnClicked;
platformView.Pressed += OnPressed;
platformView.Released += OnReleased;
}
protected override void DisconnectHandler(SkiaButton platformView)
{
platformView.Clicked -= OnClicked;
platformView.Pressed -= OnPressed;
platformView.Released -= OnReleased;
base.DisconnectHandler(platformView);
}
private void OnClicked(object? sender, EventArgs e) => VirtualView?.Clicked();
private void OnPressed(object? sender, EventArgs e) => VirtualView?.Pressed();
private void OnReleased(object? sender, EventArgs e) => VirtualView?.Released();
public static void MapStrokeColor(ButtonHandler handler, IButton button)
{
if (handler.PlatformView is null) return;
var strokeColor = button.StrokeColor;
if (strokeColor is not null)
handler.PlatformView.BorderColor = strokeColor.ToSKColor();
}
public static void MapStrokeThickness(ButtonHandler handler, IButton button)
{
if (handler.PlatformView is null) return;
handler.PlatformView.BorderWidth = (float)button.StrokeThickness;
}
public static void MapCornerRadius(ButtonHandler handler, IButton button)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CornerRadius = button.CornerRadius;
}
public static void MapBackground(ButtonHandler handler, IButton button)
{
if (handler.PlatformView is null) return;
if (button.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
public static void MapPadding(ButtonHandler handler, IButton button)
{
if (handler.PlatformView is null) return;
var padding = button.Padding;
handler.PlatformView.Padding = new SKRect(
(float)padding.Left,
(float)padding.Top,
(float)padding.Right,
(float)padding.Bottom);
}
}
/// <summary>
/// Handler for TextButton on Linux - extends ButtonHandler with text support.
/// Maps ITextButton interface (which includes IText properties).
/// </summary>
public partial class TextButtonHandler : ButtonHandler
{
public static new IPropertyMapper<ITextButton, TextButtonHandler> Mapper =
new PropertyMapper<ITextButton, TextButtonHandler>(ButtonHandler.Mapper)
{
[nameof(IText.Text)] = MapText,
[nameof(ITextStyle.TextColor)] = MapTextColor,
[nameof(ITextStyle.Font)] = MapFont,
[nameof(ITextStyle.CharacterSpacing)] = MapCharacterSpacing,
};
public TextButtonHandler() : base(Mapper)
{
}
public static void MapText(TextButtonHandler handler, ITextButton button)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Text = button.Text ?? string.Empty;
}
public static void MapTextColor(TextButtonHandler handler, ITextButton button)
{
if (handler.PlatformView is null) return;
if (button.TextColor is not null)
handler.PlatformView.TextColor = button.TextColor.ToSKColor();
}
public static void MapFont(TextButtonHandler handler, ITextButton button)
{
if (handler.PlatformView is null) return;
var font = button.Font;
if (font.Size > 0)
handler.PlatformView.FontSize = (float)font.Size;
if (!string.IsNullOrEmpty(font.Family))
handler.PlatformView.FontFamily = font.Family;
handler.PlatformView.IsBold = font.Weight >= FontWeight.Bold;
handler.PlatformView.IsItalic = font.Slant == FontSlant.Italic || font.Slant == FontSlant.Oblique;
}
public static void MapCharacterSpacing(TextButtonHandler handler, ITextButton button)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CharacterSpacing = (float)button.CharacterSpacing;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for CheckBox control.
/// </summary>
public partial class CheckBoxHandler : ViewHandler<ICheckBox, SkiaCheckBox>
{
/// <summary>
/// Maps the property mapper for the handler.
/// </summary>
public static IPropertyMapper<ICheckBox, CheckBoxHandler> Mapper = new PropertyMapper<ICheckBox, CheckBoxHandler>(ViewHandler.ViewMapper)
{
[nameof(ICheckBox.IsChecked)] = MapIsChecked,
[nameof(ICheckBox.Foreground)] = MapForeground,
[nameof(IView.IsEnabled)] = MapIsEnabled,
};
/// <summary>
/// Maps the command mapper for the handler.
/// </summary>
public static CommandMapper<ICheckBox, CheckBoxHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public CheckBoxHandler() : base(Mapper, CommandMapper)
{
}
public CheckBoxHandler(IPropertyMapper? mapper)
: base(mapper ?? Mapper, CommandMapper)
{
}
public CheckBoxHandler(IPropertyMapper? mapper, CommandMapper? commandMapper)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaCheckBox CreatePlatformView()
{
return new SkiaCheckBox();
}
protected override void ConnectHandler(SkiaCheckBox platformView)
{
base.ConnectHandler(platformView);
platformView.CheckedChanged += OnCheckedChanged;
}
protected override void DisconnectHandler(SkiaCheckBox platformView)
{
platformView.CheckedChanged -= OnCheckedChanged;
base.DisconnectHandler(platformView);
}
private void OnCheckedChanged(object? sender, CheckedChangedEventArgs e)
{
if (VirtualView != null && VirtualView.IsChecked != e.IsChecked)
{
VirtualView.IsChecked = e.IsChecked;
}
}
public static void MapIsChecked(CheckBoxHandler handler, ICheckBox checkBox)
{
if (handler.PlatformView.IsChecked != checkBox.IsChecked)
{
handler.PlatformView.IsChecked = checkBox.IsChecked;
}
}
public static void MapForeground(CheckBoxHandler handler, ICheckBox checkBox)
{
var foreground = checkBox.Foreground;
if (foreground is SolidColorBrush solidBrush && solidBrush.Color != null)
{
handler.PlatformView.BoxColor = solidBrush.Color.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(CheckBoxHandler handler, ICheckBox checkBox)
{
handler.PlatformView.IsEnabled = checkBox.IsEnabled;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for CheckBox on Linux using Skia rendering.
/// Maps ICheckBox interface to SkiaCheckBox platform view.
/// </summary>
public partial class CheckBoxHandler : ViewHandler<ICheckBox, SkiaCheckBox>
{
public static IPropertyMapper<ICheckBox, CheckBoxHandler> Mapper = new PropertyMapper<ICheckBox, CheckBoxHandler>(ViewHandler.ViewMapper)
{
[nameof(ICheckBox.IsChecked)] = MapIsChecked,
[nameof(ICheckBox.Foreground)] = MapForeground,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ICheckBox, CheckBoxHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public CheckBoxHandler() : base(Mapper, CommandMapper)
{
}
public CheckBoxHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaCheckBox CreatePlatformView()
{
return new SkiaCheckBox();
}
protected override void ConnectHandler(SkiaCheckBox platformView)
{
base.ConnectHandler(platformView);
platformView.CheckedChanged += OnCheckedChanged;
}
protected override void DisconnectHandler(SkiaCheckBox platformView)
{
platformView.CheckedChanged -= OnCheckedChanged;
base.DisconnectHandler(platformView);
}
private void OnCheckedChanged(object? sender, Platform.CheckedChangedEventArgs e)
{
if (VirtualView is not null && VirtualView.IsChecked != e.IsChecked)
{
VirtualView.IsChecked = e.IsChecked;
}
}
public static void MapIsChecked(CheckBoxHandler handler, ICheckBox checkBox)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsChecked = checkBox.IsChecked;
}
public static void MapForeground(CheckBoxHandler handler, ICheckBox checkBox)
{
if (handler.PlatformView is null) return;
if (checkBox.Foreground is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.CheckColor = solidPaint.Color.ToSKColor();
}
}
public static void MapBackground(CheckBoxHandler handler, ICheckBox checkBox)
{
if (handler.PlatformView is null) return;
if (checkBox.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for CollectionView on Linux using Skia rendering.
/// Maps CollectionView to SkiaCollectionView platform view.
/// </summary>
public partial class CollectionViewHandler : ViewHandler<CollectionView, SkiaCollectionView>
{
public static IPropertyMapper<CollectionView, CollectionViewHandler> Mapper =
new PropertyMapper<CollectionView, CollectionViewHandler>(ViewHandler.ViewMapper)
{
// ItemsView properties
[nameof(ItemsView.ItemsSource)] = MapItemsSource,
[nameof(ItemsView.ItemTemplate)] = MapItemTemplate,
[nameof(ItemsView.EmptyView)] = MapEmptyView,
[nameof(ItemsView.HorizontalScrollBarVisibility)] = MapHorizontalScrollBarVisibility,
[nameof(ItemsView.VerticalScrollBarVisibility)] = MapVerticalScrollBarVisibility,
// SelectableItemsView properties
[nameof(SelectableItemsView.SelectedItem)] = MapSelectedItem,
[nameof(SelectableItemsView.SelectedItems)] = MapSelectedItems,
[nameof(SelectableItemsView.SelectionMode)] = MapSelectionMode,
// StructuredItemsView properties
[nameof(StructuredItemsView.Header)] = MapHeader,
[nameof(StructuredItemsView.Footer)] = MapFooter,
[nameof(StructuredItemsView.ItemsLayout)] = MapItemsLayout,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<CollectionView, CollectionViewHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
["ScrollTo"] = MapScrollTo,
};
public CollectionViewHandler() : base(Mapper, CommandMapper)
{
}
public CollectionViewHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaCollectionView CreatePlatformView()
{
return new SkiaCollectionView();
}
protected override void ConnectHandler(SkiaCollectionView platformView)
{
base.ConnectHandler(platformView);
platformView.SelectionChanged += OnSelectionChanged;
platformView.Scrolled += OnScrolled;
platformView.ItemTapped += OnItemTapped;
}
protected override void DisconnectHandler(SkiaCollectionView platformView)
{
platformView.SelectionChanged -= OnSelectionChanged;
platformView.Scrolled -= OnScrolled;
platformView.ItemTapped -= OnItemTapped;
base.DisconnectHandler(platformView);
}
private void OnSelectionChanged(object? sender, CollectionSelectionChangedEventArgs e)
{
if (VirtualView is null) return;
// Update virtual view selection
if (VirtualView.SelectionMode == SelectionMode.Single)
{
VirtualView.SelectedItem = e.CurrentSelection.FirstOrDefault();
}
else if (VirtualView.SelectionMode == SelectionMode.Multiple)
{
// Clear and update selected items
VirtualView.SelectedItems.Clear();
foreach (var item in e.CurrentSelection)
{
VirtualView.SelectedItems.Add(item);
}
}
}
private void OnScrolled(object? sender, ItemsScrolledEventArgs e)
{
VirtualView?.SendScrolled(new ItemsViewScrolledEventArgs
{
VerticalOffset = e.ScrollOffset,
VerticalDelta = 0,
HorizontalOffset = 0,
HorizontalDelta = 0
});
}
private void OnItemTapped(object? sender, ItemsViewItemTappedEventArgs e)
{
// Item tap is handled through selection
}
public static void MapItemsSource(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.ItemsSource = collectionView.ItemsSource;
}
public static void MapItemTemplate(CollectionViewHandler handler, CollectionView collectionView)
{
handler.PlatformView?.Invalidate();
}
public static void MapEmptyView(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.EmptyView = collectionView.EmptyView;
if (collectionView.EmptyView is string text)
{
handler.PlatformView.EmptyViewText = text;
}
}
public static void MapHorizontalScrollBarVisibility(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.HorizontalScrollBarVisibility = (ScrollBarVisibility)collectionView.HorizontalScrollBarVisibility;
}
public static void MapVerticalScrollBarVisibility(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.VerticalScrollBarVisibility = (ScrollBarVisibility)collectionView.VerticalScrollBarVisibility;
}
public static void MapSelectedItem(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.SelectedItem = collectionView.SelectedItem;
}
public static void MapSelectedItems(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
// Sync selected items
var selectedItems = collectionView.SelectedItems;
if (selectedItems != null && selectedItems.Count > 0)
{
handler.PlatformView.SelectedItem = selectedItems.First();
}
}
public static void MapSelectionMode(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.SelectionMode = collectionView.SelectionMode switch
{
SelectionMode.None => SkiaSelectionMode.None,
SelectionMode.Single => SkiaSelectionMode.Single,
SelectionMode.Multiple => SkiaSelectionMode.Multiple,
_ => SkiaSelectionMode.None
};
}
public static void MapHeader(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Header = collectionView.Header;
}
public static void MapFooter(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Footer = collectionView.Footer;
}
public static void MapItemsLayout(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
var layout = collectionView.ItemsLayout;
if (layout is LinearItemsLayout linearLayout)
{
handler.PlatformView.Orientation = linearLayout.Orientation == Controls.ItemsLayoutOrientation.Vertical
? Platform.ItemsLayoutOrientation.Vertical
: Platform.ItemsLayoutOrientation.Horizontal;
handler.PlatformView.SpanCount = 1;
handler.PlatformView.ItemSpacing = (float)linearLayout.ItemSpacing;
}
else if (layout is GridItemsLayout gridLayout)
{
handler.PlatformView.Orientation = gridLayout.Orientation == Controls.ItemsLayoutOrientation.Vertical
? Platform.ItemsLayoutOrientation.Vertical
: Platform.ItemsLayoutOrientation.Horizontal;
handler.PlatformView.SpanCount = gridLayout.Span;
handler.PlatformView.ItemSpacing = (float)gridLayout.VerticalItemSpacing;
}
}
public static void MapBackground(CollectionViewHandler handler, CollectionView collectionView)
{
if (handler.PlatformView is null) return;
if (collectionView.Background is SolidColorBrush solidBrush)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
}
public static void MapScrollTo(CollectionViewHandler handler, CollectionView collectionView, object? args)
{
if (handler.PlatformView is null || args is not ScrollToRequestEventArgs scrollArgs)
return;
if (scrollArgs.Mode == ScrollToMode.Position)
{
handler.PlatformView.ScrollToIndex(scrollArgs.Index, scrollArgs.IsAnimated);
}
else if (scrollArgs.Item != null)
{
handler.PlatformView.ScrollToItem(scrollArgs.Item, scrollArgs.IsAnimated);
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for DatePicker on Linux using Skia rendering.
/// </summary>
public partial class DatePickerHandler : ViewHandler<IDatePicker, SkiaDatePicker>
{
public static IPropertyMapper<IDatePicker, DatePickerHandler> Mapper =
new PropertyMapper<IDatePicker, DatePickerHandler>(ViewHandler.ViewMapper)
{
[nameof(IDatePicker.Date)] = MapDate,
[nameof(IDatePicker.MinimumDate)] = MapMinimumDate,
[nameof(IDatePicker.MaximumDate)] = MapMaximumDate,
[nameof(IDatePicker.Format)] = MapFormat,
[nameof(IDatePicker.TextColor)] = MapTextColor,
[nameof(IDatePicker.CharacterSpacing)] = MapCharacterSpacing,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IDatePicker, DatePickerHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public DatePickerHandler() : base(Mapper, CommandMapper)
{
}
public DatePickerHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaDatePicker CreatePlatformView()
{
return new SkiaDatePicker();
}
protected override void ConnectHandler(SkiaDatePicker platformView)
{
base.ConnectHandler(platformView);
platformView.DateSelected += OnDateSelected;
}
protected override void DisconnectHandler(SkiaDatePicker platformView)
{
platformView.DateSelected -= OnDateSelected;
base.DisconnectHandler(platformView);
}
private void OnDateSelected(object? sender, EventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
VirtualView.Date = PlatformView.Date;
}
public static void MapDate(DatePickerHandler handler, IDatePicker datePicker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Date = datePicker.Date;
}
public static void MapMinimumDate(DatePickerHandler handler, IDatePicker datePicker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MinimumDate = datePicker.MinimumDate;
}
public static void MapMaximumDate(DatePickerHandler handler, IDatePicker datePicker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MaximumDate = datePicker.MaximumDate;
}
public static void MapFormat(DatePickerHandler handler, IDatePicker datePicker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Format = datePicker.Format ?? "d";
}
public static void MapTextColor(DatePickerHandler handler, IDatePicker datePicker)
{
if (handler.PlatformView is null) return;
if (datePicker.TextColor is not null)
{
handler.PlatformView.TextColor = datePicker.TextColor.ToSKColor();
}
}
public static void MapCharacterSpacing(DatePickerHandler handler, IDatePicker datePicker)
{
// Character spacing would require custom text rendering
}
public static void MapBackground(DatePickerHandler handler, IDatePicker datePicker)
{
if (handler.PlatformView is null) return;
if (datePicker.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Editor (multiline text) on Linux using Skia rendering.
/// </summary>
public partial class EditorHandler : ViewHandler<IEditor, SkiaEditor>
{
public static IPropertyMapper<IEditor, EditorHandler> Mapper =
new PropertyMapper<IEditor, EditorHandler>(ViewHandler.ViewMapper)
{
[nameof(IEditor.Text)] = MapText,
[nameof(IEditor.Placeholder)] = MapPlaceholder,
[nameof(IEditor.PlaceholderColor)] = MapPlaceholderColor,
[nameof(IEditor.TextColor)] = MapTextColor,
[nameof(IEditor.CharacterSpacing)] = MapCharacterSpacing,
[nameof(IEditor.IsReadOnly)] = MapIsReadOnly,
[nameof(IEditor.IsTextPredictionEnabled)] = MapIsTextPredictionEnabled,
[nameof(IEditor.MaxLength)] = MapMaxLength,
[nameof(IEditor.CursorPosition)] = MapCursorPosition,
[nameof(IEditor.SelectionLength)] = MapSelectionLength,
[nameof(IEditor.Keyboard)] = MapKeyboard,
[nameof(IEditor.HorizontalTextAlignment)] = MapHorizontalTextAlignment,
[nameof(IEditor.VerticalTextAlignment)] = MapVerticalTextAlignment,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IEditor, EditorHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public EditorHandler() : base(Mapper, CommandMapper)
{
}
public EditorHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaEditor CreatePlatformView()
{
return new SkiaEditor();
}
protected override void ConnectHandler(SkiaEditor platformView)
{
base.ConnectHandler(platformView);
platformView.TextChanged += OnTextChanged;
platformView.Completed += OnCompleted;
}
protected override void DisconnectHandler(SkiaEditor platformView)
{
platformView.TextChanged -= OnTextChanged;
platformView.Completed -= OnCompleted;
base.DisconnectHandler(platformView);
}
private void OnTextChanged(object? sender, EventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
VirtualView.Text = PlatformView.Text;
}
private void OnCompleted(object? sender, EventArgs e)
{
// Editor doesn't typically have a completed event, but we could trigger it
}
public static void MapText(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Text = editor.Text ?? "";
}
public static void MapPlaceholder(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Placeholder = editor.Placeholder ?? "";
}
public static void MapPlaceholderColor(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
if (editor.PlaceholderColor is not null)
{
handler.PlatformView.PlaceholderColor = editor.PlaceholderColor.ToSKColor();
}
}
public static void MapTextColor(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
if (editor.TextColor is not null)
{
handler.PlatformView.TextColor = editor.TextColor.ToSKColor();
}
}
public static void MapCharacterSpacing(EditorHandler handler, IEditor editor)
{
// Character spacing would require custom text rendering
}
public static void MapIsReadOnly(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsReadOnly = editor.IsReadOnly;
}
public static void MapIsTextPredictionEnabled(EditorHandler handler, IEditor editor)
{
// Text prediction not applicable to desktop
}
public static void MapMaxLength(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MaxLength = editor.MaxLength;
}
public static void MapCursorPosition(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CursorPosition = editor.CursorPosition;
}
public static void MapSelectionLength(EditorHandler handler, IEditor editor)
{
// Selection would need to be added to SkiaEditor
}
public static void MapKeyboard(EditorHandler handler, IEditor editor)
{
// Virtual keyboard type not applicable to desktop
}
public static void MapHorizontalTextAlignment(EditorHandler handler, IEditor editor)
{
// Text alignment would require changes to SkiaEditor drawing
}
public static void MapVerticalTextAlignment(EditorHandler handler, IEditor editor)
{
// Text alignment would require changes to SkiaEditor drawing
}
public static void MapBackground(EditorHandler handler, IEditor editor)
{
if (handler.PlatformView is null) return;
if (editor.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for Entry control.
/// </summary>
public partial class EntryHandler : ViewHandler<IEntry, SkiaEntry>
{
/// <summary>
/// Maps the property mapper for the handler.
/// </summary>
public static IPropertyMapper<IEntry, EntryHandler> Mapper = new PropertyMapper<IEntry, EntryHandler>(ViewHandler.ViewMapper)
{
[nameof(IEntry.Text)] = MapText,
[nameof(IEntry.TextColor)] = MapTextColor,
[nameof(IEntry.Placeholder)] = MapPlaceholder,
[nameof(IEntry.PlaceholderColor)] = MapPlaceholderColor,
[nameof(IEntry.Font)] = MapFont,
[nameof(IEntry.IsPassword)] = MapIsPassword,
[nameof(IEntry.MaxLength)] = MapMaxLength,
[nameof(IEntry.IsReadOnly)] = MapIsReadOnly,
[nameof(IEntry.HorizontalTextAlignment)] = MapHorizontalTextAlignment,
[nameof(IEntry.CursorPosition)] = MapCursorPosition,
[nameof(IEntry.SelectionLength)] = MapSelectionLength,
[nameof(IEntry.ReturnType)] = MapReturnType,
[nameof(IView.IsEnabled)] = MapIsEnabled,
[nameof(IEntry.Background)] = MapBackground,
};
/// <summary>
/// Maps the command mapper for the handler.
/// </summary>
public static CommandMapper<IEntry, EntryHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public EntryHandler() : base(Mapper, CommandMapper)
{
}
public EntryHandler(IPropertyMapper? mapper)
: base(mapper ?? Mapper, CommandMapper)
{
}
public EntryHandler(IPropertyMapper? mapper, CommandMapper? commandMapper)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaEntry CreatePlatformView()
{
return new SkiaEntry();
}
protected override void ConnectHandler(SkiaEntry platformView)
{
base.ConnectHandler(platformView);
platformView.TextChanged += OnTextChanged;
platformView.Completed += OnCompleted;
}
protected override void DisconnectHandler(SkiaEntry platformView)
{
platformView.TextChanged -= OnTextChanged;
platformView.Completed -= OnCompleted;
base.DisconnectHandler(platformView);
}
private void OnTextChanged(object? sender, TextChangedEventArgs e)
{
if (VirtualView != null && VirtualView.Text != e.NewText)
{
VirtualView.Text = e.NewText;
}
}
private void OnCompleted(object? sender, EventArgs e)
{
VirtualView?.Completed();
}
public static void MapText(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView.Text != entry.Text)
{
handler.PlatformView.Text = entry.Text ?? "";
}
}
public static void MapTextColor(EntryHandler handler, IEntry entry)
{
if (entry.TextColor != null)
{
handler.PlatformView.TextColor = entry.TextColor.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapPlaceholder(EntryHandler handler, IEntry entry)
{
handler.PlatformView.Placeholder = entry.Placeholder ?? "";
handler.PlatformView.Invalidate();
}
public static void MapPlaceholderColor(EntryHandler handler, IEntry entry)
{
if (entry.PlaceholderColor != null)
{
handler.PlatformView.PlaceholderColor = entry.PlaceholderColor.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapFont(EntryHandler handler, IEntry entry)
{
var font = entry.Font;
if (font.Family != null)
{
handler.PlatformView.FontFamily = font.Family;
}
handler.PlatformView.FontSize = (float)font.Size;
handler.PlatformView.Invalidate();
}
public static void MapIsPassword(EntryHandler handler, IEntry entry)
{
handler.PlatformView.IsPassword = entry.IsPassword;
handler.PlatformView.Invalidate();
}
public static void MapMaxLength(EntryHandler handler, IEntry entry)
{
handler.PlatformView.MaxLength = entry.MaxLength;
}
public static void MapIsReadOnly(EntryHandler handler, IEntry entry)
{
handler.PlatformView.IsReadOnly = entry.IsReadOnly;
}
public static void MapHorizontalTextAlignment(EntryHandler handler, IEntry entry)
{
handler.PlatformView.HorizontalTextAlignment = entry.HorizontalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => TextAlignment.End,
_ => TextAlignment.Start
};
handler.PlatformView.Invalidate();
}
public static void MapCursorPosition(EntryHandler handler, IEntry entry)
{
handler.PlatformView.CursorPosition = entry.CursorPosition;
}
public static void MapSelectionLength(EntryHandler handler, IEntry entry)
{
// Selection length is handled internally by SkiaEntry
}
public static void MapReturnType(EntryHandler handler, IEntry entry)
{
// Return type affects keyboard on mobile; on desktop, Enter always completes
}
public static void MapIsEnabled(EntryHandler handler, IEntry entry)
{
handler.PlatformView.IsEnabled = entry.IsEnabled;
handler.PlatformView.Invalidate();
}
public static void MapBackground(EntryHandler handler, IEntry entry)
{
var background = entry.Background;
if (background is SolidColorBrush solidBrush && solidBrush.Color != null)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Entry on Linux using Skia rendering.
/// Maps IEntry interface to SkiaEntry platform view.
/// </summary>
public partial class EntryHandler : ViewHandler<IEntry, SkiaEntry>
{
public static IPropertyMapper<IEntry, EntryHandler> Mapper = new PropertyMapper<IEntry, EntryHandler>(ViewHandler.ViewMapper)
{
[nameof(ITextInput.Text)] = MapText,
[nameof(ITextStyle.TextColor)] = MapTextColor,
[nameof(ITextStyle.Font)] = MapFont,
[nameof(ITextStyle.CharacterSpacing)] = MapCharacterSpacing,
[nameof(IPlaceholder.Placeholder)] = MapPlaceholder,
[nameof(IPlaceholder.PlaceholderColor)] = MapPlaceholderColor,
[nameof(ITextInput.IsReadOnly)] = MapIsReadOnly,
[nameof(ITextInput.MaxLength)] = MapMaxLength,
[nameof(ITextInput.CursorPosition)] = MapCursorPosition,
[nameof(ITextInput.SelectionLength)] = MapSelectionLength,
[nameof(IEntry.IsPassword)] = MapIsPassword,
[nameof(IEntry.ReturnType)] = MapReturnType,
[nameof(IEntry.ClearButtonVisibility)] = MapClearButtonVisibility,
[nameof(ITextAlignment.HorizontalTextAlignment)] = MapHorizontalTextAlignment,
[nameof(ITextAlignment.VerticalTextAlignment)] = MapVerticalTextAlignment,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IEntry, EntryHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public EntryHandler() : base(Mapper, CommandMapper)
{
}
public EntryHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaEntry CreatePlatformView()
{
return new SkiaEntry();
}
protected override void ConnectHandler(SkiaEntry platformView)
{
base.ConnectHandler(platformView);
platformView.TextChanged += OnTextChanged;
platformView.Completed += OnCompleted;
}
protected override void DisconnectHandler(SkiaEntry platformView)
{
platformView.TextChanged -= OnTextChanged;
platformView.Completed -= OnCompleted;
base.DisconnectHandler(platformView);
}
private void OnTextChanged(object? sender, Platform.TextChangedEventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
if (VirtualView.Text != e.NewTextValue)
{
VirtualView.Text = e.NewTextValue ?? string.Empty;
}
}
private void OnCompleted(object? sender, EventArgs e)
{
VirtualView?.Completed();
}
public static void MapText(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
if (handler.PlatformView.Text != entry.Text)
handler.PlatformView.Text = entry.Text ?? string.Empty;
}
public static void MapTextColor(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
if (entry.TextColor is not null)
handler.PlatformView.TextColor = entry.TextColor.ToSKColor();
}
public static void MapFont(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
var font = entry.Font;
if (font.Size > 0)
handler.PlatformView.FontSize = (float)font.Size;
if (!string.IsNullOrEmpty(font.Family))
handler.PlatformView.FontFamily = font.Family;
handler.PlatformView.IsBold = font.Weight >= FontWeight.Bold;
handler.PlatformView.IsItalic = font.Slant == FontSlant.Italic || font.Slant == FontSlant.Oblique;
}
public static void MapCharacterSpacing(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CharacterSpacing = (float)entry.CharacterSpacing;
}
public static void MapPlaceholder(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Placeholder = entry.Placeholder ?? string.Empty;
}
public static void MapPlaceholderColor(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
if (entry.PlaceholderColor is not null)
handler.PlatformView.PlaceholderColor = entry.PlaceholderColor.ToSKColor();
}
public static void MapIsReadOnly(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsReadOnly = entry.IsReadOnly;
}
public static void MapMaxLength(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MaxLength = entry.MaxLength;
}
public static void MapCursorPosition(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CursorPosition = entry.CursorPosition;
}
public static void MapSelectionLength(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.SelectionLength = entry.SelectionLength;
}
public static void MapIsPassword(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsPassword = entry.IsPassword;
}
public static void MapReturnType(EntryHandler handler, IEntry entry)
{
// ReturnType affects keyboard behavior - stored for virtual keyboard integration
if (handler.PlatformView is null) return;
// handler.PlatformView.ReturnType = entry.ReturnType; // Would need property on SkiaEntry
}
public static void MapClearButtonVisibility(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.ShowClearButton = entry.ClearButtonVisibility == ClearButtonVisibility.WhileEditing;
}
public static void MapHorizontalTextAlignment(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.HorizontalTextAlignment = entry.HorizontalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => Platform.TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => Platform.TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => Platform.TextAlignment.End,
_ => Platform.TextAlignment.Start
};
}
public static void MapVerticalTextAlignment(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
handler.PlatformView.VerticalTextAlignment = entry.VerticalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => Platform.TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => Platform.TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => Platform.TextAlignment.End,
_ => Platform.TextAlignment.Center
};
}
public static void MapBackground(EntryHandler handler, IEntry entry)
{
if (handler.PlatformView is null) return;
if (entry.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for FlyoutPage on Linux using Skia rendering.
/// Maps IFlyoutView interface to SkiaFlyoutPage platform view.
/// </summary>
public partial class FlyoutPageHandler : ViewHandler<IFlyoutView, SkiaFlyoutPage>
{
public static IPropertyMapper<IFlyoutView, FlyoutPageHandler> Mapper = new PropertyMapper<IFlyoutView, FlyoutPageHandler>(ViewHandler.ViewMapper)
{
[nameof(IFlyoutView.IsPresented)] = MapIsPresented,
[nameof(IFlyoutView.FlyoutWidth)] = MapFlyoutWidth,
[nameof(IFlyoutView.IsGestureEnabled)] = MapIsGestureEnabled,
[nameof(IFlyoutView.FlyoutBehavior)] = MapFlyoutBehavior,
};
public static CommandMapper<IFlyoutView, FlyoutPageHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public FlyoutPageHandler() : base(Mapper, CommandMapper)
{
}
public FlyoutPageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaFlyoutPage CreatePlatformView()
{
return new SkiaFlyoutPage();
}
protected override void ConnectHandler(SkiaFlyoutPage platformView)
{
base.ConnectHandler(platformView);
platformView.IsPresentedChanged += OnIsPresentedChanged;
}
protected override void DisconnectHandler(SkiaFlyoutPage platformView)
{
platformView.IsPresentedChanged -= OnIsPresentedChanged;
platformView.Flyout = null;
platformView.Detail = null;
base.DisconnectHandler(platformView);
}
private void OnIsPresentedChanged(object? sender, EventArgs e)
{
// Sync back to the virtual view
}
public static void MapIsPresented(FlyoutPageHandler handler, IFlyoutView flyoutView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsPresented = flyoutView.IsPresented;
}
public static void MapFlyoutWidth(FlyoutPageHandler handler, IFlyoutView flyoutView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.FlyoutWidth = (float)flyoutView.FlyoutWidth;
}
public static void MapIsGestureEnabled(FlyoutPageHandler handler, IFlyoutView flyoutView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.GestureEnabled = flyoutView.IsGestureEnabled;
}
public static void MapFlyoutBehavior(FlyoutPageHandler handler, IFlyoutView flyoutView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.FlyoutLayoutBehavior = flyoutView.FlyoutBehavior switch
{
Microsoft.Maui.FlyoutBehavior.Disabled => FlyoutLayoutBehavior.Default,
Microsoft.Maui.FlyoutBehavior.Flyout => FlyoutLayoutBehavior.Popover,
Microsoft.Maui.FlyoutBehavior.Locked => FlyoutLayoutBehavior.Split,
_ => FlyoutLayoutBehavior.Default
};
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for GraphicsView on Linux using Skia rendering.
/// Maps IGraphicsView interface to SkiaGraphicsView platform view.
/// IGraphicsView has: Drawable, Invalidate()
/// </summary>
public partial class GraphicsViewHandler : ViewHandler<IGraphicsView, SkiaGraphicsView>
{
public static IPropertyMapper<IGraphicsView, GraphicsViewHandler> Mapper = new PropertyMapper<IGraphicsView, GraphicsViewHandler>(ViewHandler.ViewMapper)
{
[nameof(IGraphicsView.Drawable)] = MapDrawable,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IGraphicsView, GraphicsViewHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
[nameof(IGraphicsView.Invalidate)] = MapInvalidate,
};
public GraphicsViewHandler() : base(Mapper, CommandMapper)
{
}
public GraphicsViewHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaGraphicsView CreatePlatformView()
{
return new SkiaGraphicsView();
}
public static void MapDrawable(GraphicsViewHandler handler, IGraphicsView graphicsView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Drawable = graphicsView.Drawable;
}
public static void MapBackground(GraphicsViewHandler handler, IGraphicsView graphicsView)
{
if (handler.PlatformView is null) return;
if (graphicsView.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
public static void MapInvalidate(GraphicsViewHandler handler, IGraphicsView graphicsView, object? args)
{
handler.PlatformView?.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for ImageButton on Linux using Skia rendering.
/// Maps IImageButton interface to SkiaImageButton platform view.
/// IImageButton extends: IImage, IView, IButtonStroke, IPadding
/// </summary>
public partial class ImageButtonHandler : ViewHandler<IImageButton, SkiaImageButton>
{
public static IPropertyMapper<IImageButton, ImageButtonHandler> Mapper = new PropertyMapper<IImageButton, ImageButtonHandler>(ViewHandler.ViewMapper)
{
[nameof(IImage.Aspect)] = MapAspect,
[nameof(IImage.IsOpaque)] = MapIsOpaque,
[nameof(IImageSourcePart.Source)] = MapSource,
[nameof(IButtonStroke.StrokeColor)] = MapStrokeColor,
[nameof(IButtonStroke.StrokeThickness)] = MapStrokeThickness,
[nameof(IButtonStroke.CornerRadius)] = MapCornerRadius,
[nameof(IPadding.Padding)] = MapPadding,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IImageButton, ImageButtonHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ImageButtonHandler() : base(Mapper, CommandMapper)
{
}
public ImageButtonHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaImageButton CreatePlatformView()
{
return new SkiaImageButton();
}
protected override void ConnectHandler(SkiaImageButton platformView)
{
base.ConnectHandler(platformView);
platformView.Clicked += OnClicked;
platformView.Pressed += OnPressed;
platformView.Released += OnReleased;
platformView.ImageLoaded += OnImageLoaded;
platformView.ImageLoadingError += OnImageLoadingError;
}
protected override void DisconnectHandler(SkiaImageButton platformView)
{
platformView.Clicked -= OnClicked;
platformView.Pressed -= OnPressed;
platformView.Released -= OnReleased;
platformView.ImageLoaded -= OnImageLoaded;
platformView.ImageLoadingError -= OnImageLoadingError;
base.DisconnectHandler(platformView);
}
private void OnClicked(object? sender, EventArgs e)
{
VirtualView?.Clicked();
}
private void OnPressed(object? sender, EventArgs e)
{
VirtualView?.Pressed();
}
private void OnReleased(object? sender, EventArgs e)
{
VirtualView?.Released();
}
private void OnImageLoaded(object? sender, EventArgs e)
{
if (VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(false);
}
}
private void OnImageLoadingError(object? sender, ImageLoadingErrorEventArgs e)
{
if (VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(false);
}
}
public static void MapAspect(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Aspect = imageButton.Aspect;
}
public static void MapIsOpaque(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsOpaque = imageButton.IsOpaque;
}
public static void MapSource(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
handler.SourceLoader.UpdateImageSourceAsync();
}
public static void MapStrokeColor(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
if (imageButton.StrokeColor is not null)
handler.PlatformView.StrokeColor = imageButton.StrokeColor.ToSKColor();
}
public static void MapStrokeThickness(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
handler.PlatformView.StrokeThickness = (float)imageButton.StrokeThickness;
}
public static void MapCornerRadius(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CornerRadius = imageButton.CornerRadius;
}
public static void MapPadding(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
var padding = imageButton.Padding;
handler.PlatformView.PaddingLeft = (float)padding.Left;
handler.PlatformView.PaddingTop = (float)padding.Top;
handler.PlatformView.PaddingRight = (float)padding.Right;
handler.PlatformView.PaddingBottom = (float)padding.Bottom;
}
public static void MapBackground(ImageButtonHandler handler, IImageButton imageButton)
{
if (handler.PlatformView is null) return;
if (imageButton.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
// Image source loading helper
private ImageSourceServiceResultManager _sourceLoader = null!;
private ImageSourceServiceResultManager SourceLoader =>
_sourceLoader ??= new ImageSourceServiceResultManager(this);
internal class ImageSourceServiceResultManager
{
private readonly ImageButtonHandler _handler;
private CancellationTokenSource? _cts;
public ImageSourceServiceResultManager(ImageButtonHandler handler)
{
_handler = handler;
}
public async void UpdateImageSourceAsync()
{
_cts?.Cancel();
_cts = new CancellationTokenSource();
var token = _cts.Token;
try
{
var source = _handler.VirtualView?.Source;
if (source == null)
{
_handler.PlatformView?.LoadFromData(Array.Empty<byte>());
return;
}
if (_handler.VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(true);
}
// Handle different image source types
if (source is IFileImageSource fileSource)
{
var file = fileSource.File;
if (!string.IsNullOrEmpty(file))
{
await _handler.PlatformView!.LoadFromFileAsync(file);
}
}
else if (source is IUriImageSource uriSource)
{
var uri = uriSource.Uri;
if (uri != null)
{
await _handler.PlatformView!.LoadFromUriAsync(uri);
}
}
else if (source is IStreamImageSource streamSource)
{
var stream = await streamSource.GetStreamAsync(token);
if (stream != null)
{
await _handler.PlatformView!.LoadFromStreamAsync(stream);
}
}
}
catch (OperationCanceledException)
{
// Loading was cancelled
}
catch (Exception)
{
// Handle error
if (_handler.VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(false);
}
}
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Image on Linux using Skia rendering.
/// Maps IImage interface to SkiaImage platform view.
/// IImage has: Aspect, IsOpaque (inherits from IImageSourcePart)
/// </summary>
public partial class ImageHandler : ViewHandler<IImage, SkiaImage>
{
public static IPropertyMapper<IImage, ImageHandler> Mapper = new PropertyMapper<IImage, ImageHandler>(ViewHandler.ViewMapper)
{
[nameof(IImage.Aspect)] = MapAspect,
[nameof(IImage.IsOpaque)] = MapIsOpaque,
[nameof(IImageSourcePart.Source)] = MapSource,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IImage, ImageHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ImageHandler() : base(Mapper, CommandMapper)
{
}
public ImageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaImage CreatePlatformView()
{
return new SkiaImage();
}
protected override void ConnectHandler(SkiaImage platformView)
{
base.ConnectHandler(platformView);
platformView.ImageLoaded += OnImageLoaded;
platformView.ImageLoadingError += OnImageLoadingError;
}
protected override void DisconnectHandler(SkiaImage platformView)
{
platformView.ImageLoaded -= OnImageLoaded;
platformView.ImageLoadingError -= OnImageLoadingError;
base.DisconnectHandler(platformView);
}
private void OnImageLoaded(object? sender, EventArgs e)
{
// Notify that the image has been loaded
if (VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(false);
}
}
private void OnImageLoadingError(object? sender, ImageLoadingErrorEventArgs e)
{
// Handle loading error
if (VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(false);
}
}
public static void MapAspect(ImageHandler handler, IImage image)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Aspect = image.Aspect;
}
public static void MapIsOpaque(ImageHandler handler, IImage image)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsOpaque = image.IsOpaque;
}
public static void MapSource(ImageHandler handler, IImage image)
{
if (handler.PlatformView is null) return;
handler.SourceLoader.UpdateImageSourceAsync();
}
public static void MapBackground(ImageHandler handler, IImage image)
{
if (handler.PlatformView is null) return;
if (image.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
// Image source loading helper
private ImageSourceServiceResultManager _sourceLoader = null!;
private ImageSourceServiceResultManager SourceLoader =>
_sourceLoader ??= new ImageSourceServiceResultManager(this);
internal class ImageSourceServiceResultManager
{
private readonly ImageHandler _handler;
private CancellationTokenSource? _cts;
public ImageSourceServiceResultManager(ImageHandler handler)
{
_handler = handler;
}
public async void UpdateImageSourceAsync()
{
_cts?.Cancel();
_cts = new CancellationTokenSource();
var token = _cts.Token;
try
{
var source = _handler.VirtualView?.Source;
if (source == null)
{
_handler.PlatformView?.LoadFromData(Array.Empty<byte>());
return;
}
if (_handler.VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(true);
}
// Handle different image source types
if (source is IFileImageSource fileSource)
{
var file = fileSource.File;
if (!string.IsNullOrEmpty(file))
{
await _handler.PlatformView!.LoadFromFileAsync(file);
}
}
else if (source is IUriImageSource uriSource)
{
var uri = uriSource.Uri;
if (uri != null)
{
await _handler.PlatformView!.LoadFromUriAsync(uri);
}
}
else if (source is IStreamImageSource streamSource)
{
var stream = await streamSource.GetStreamAsync(token);
if (stream != null)
{
await _handler.PlatformView!.LoadFromStreamAsync(stream);
}
}
}
catch (OperationCanceledException)
{
// Loading was cancelled
}
catch (Exception)
{
// Handle error
if (_handler.VirtualView is IImageSourcePart imageSourcePart)
{
imageSourcePart.UpdateIsLoading(false);
}
}
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Base handler for ItemsView on Linux using Skia rendering.
/// Maps ItemsView to SkiaItemsView platform view.
/// </summary>
public partial class ItemsViewHandler<TItemsView> : ViewHandler<TItemsView, SkiaItemsView>
where TItemsView : ItemsView
{
public static IPropertyMapper<TItemsView, ItemsViewHandler<TItemsView>> ItemsViewMapper =
new PropertyMapper<TItemsView, ItemsViewHandler<TItemsView>>(ViewHandler.ViewMapper)
{
[nameof(ItemsView.ItemsSource)] = MapItemsSource,
[nameof(ItemsView.ItemTemplate)] = MapItemTemplate,
[nameof(ItemsView.EmptyView)] = MapEmptyView,
[nameof(ItemsView.EmptyViewTemplate)] = MapEmptyViewTemplate,
[nameof(ItemsView.HorizontalScrollBarVisibility)] = MapHorizontalScrollBarVisibility,
[nameof(ItemsView.VerticalScrollBarVisibility)] = MapVerticalScrollBarVisibility,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<TItemsView, ItemsViewHandler<TItemsView>> ItemsViewCommandMapper =
new(ViewHandler.ViewCommandMapper)
{
["ScrollTo"] = MapScrollTo,
};
public ItemsViewHandler() : base(ItemsViewMapper, ItemsViewCommandMapper)
{
}
public ItemsViewHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? ItemsViewMapper, commandMapper ?? ItemsViewCommandMapper)
{
}
protected override SkiaItemsView CreatePlatformView()
{
return new SkiaItemsView();
}
protected override void ConnectHandler(SkiaItemsView platformView)
{
base.ConnectHandler(platformView);
platformView.Scrolled += OnScrolled;
platformView.ItemTapped += OnItemTapped;
// Set up item renderer
platformView.ItemRenderer = RenderItem;
}
protected override void DisconnectHandler(SkiaItemsView platformView)
{
platformView.Scrolled -= OnScrolled;
platformView.ItemTapped -= OnItemTapped;
platformView.ItemRenderer = null;
base.DisconnectHandler(platformView);
}
private void OnScrolled(object? sender, ItemsScrolledEventArgs e)
{
// Fire scrolled event on virtual view
VirtualView?.SendScrolled(new ItemsViewScrolledEventArgs
{
VerticalOffset = e.ScrollOffset,
VerticalDelta = 0,
HorizontalOffset = 0,
HorizontalDelta = 0
});
}
private void OnItemTapped(object? sender, ItemsViewItemTappedEventArgs e)
{
// Item tap handling - can be extended for selection
}
protected virtual bool RenderItem(object item, int index, SKRect bounds, SKCanvas canvas, SKPaint paint)
{
// Check if we have an ItemTemplate
var template = VirtualView?.ItemTemplate;
if (template == null)
return false; // Use default rendering
// For now, render based on item ToString
// Full DataTemplate support would require creating actual views
return false;
}
public static void MapItemsSource(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.ItemsSource = itemsView.ItemsSource;
}
public static void MapItemTemplate(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
// ItemTemplate affects how items are rendered
// The renderer will check this when drawing items
handler.PlatformView?.Invalidate();
}
public static void MapEmptyView(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.EmptyView = itemsView.EmptyView;
if (itemsView.EmptyView is string text)
{
handler.PlatformView.EmptyViewText = text;
}
}
public static void MapEmptyViewTemplate(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
// EmptyViewTemplate would be used to render custom empty view
handler.PlatformView?.Invalidate();
}
public static void MapHorizontalScrollBarVisibility(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.HorizontalScrollBarVisibility = (ScrollBarVisibility)itemsView.HorizontalScrollBarVisibility;
}
public static void MapVerticalScrollBarVisibility(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.VerticalScrollBarVisibility = (ScrollBarVisibility)itemsView.VerticalScrollBarVisibility;
}
public static void MapBackground(ItemsViewHandler<TItemsView> handler, TItemsView itemsView)
{
if (handler.PlatformView is null) return;
if (itemsView.Background is SolidColorBrush solidBrush)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
}
public static void MapScrollTo(ItemsViewHandler<TItemsView> handler, TItemsView itemsView, object? args)
{
if (handler.PlatformView is null || args is not ScrollToRequestEventArgs scrollArgs)
return;
if (scrollArgs.Mode == ScrollToMode.Position)
{
handler.PlatformView.ScrollToIndex(scrollArgs.Index, scrollArgs.IsAnimated);
}
else if (scrollArgs.Item != null)
{
handler.PlatformView.ScrollToItem(scrollArgs.Item, scrollArgs.IsAnimated);
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for Label control.
/// </summary>
public partial class LabelHandler : ViewHandler<ILabel, SkiaLabel>
{
/// <summary>
/// Maps the property mapper for the handler.
/// </summary>
public static IPropertyMapper<ILabel, LabelHandler> Mapper = new PropertyMapper<ILabel, LabelHandler>(ViewHandler.ViewMapper)
{
[nameof(ILabel.Text)] = MapText,
[nameof(ILabel.TextColor)] = MapTextColor,
[nameof(ILabel.Font)] = MapFont,
[nameof(ILabel.HorizontalTextAlignment)] = MapHorizontalTextAlignment,
[nameof(ILabel.VerticalTextAlignment)] = MapVerticalTextAlignment,
[nameof(ILabel.LineBreakMode)] = MapLineBreakMode,
[nameof(ILabel.MaxLines)] = MapMaxLines,
[nameof(ILabel.Padding)] = MapPadding,
[nameof(ILabel.TextDecorations)] = MapTextDecorations,
[nameof(ILabel.LineHeight)] = MapLineHeight,
};
/// <summary>
/// Maps the command mapper for the handler.
/// </summary>
public static CommandMapper<ILabel, LabelHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public LabelHandler() : base(Mapper, CommandMapper)
{
}
public LabelHandler(IPropertyMapper? mapper)
: base(mapper ?? Mapper, CommandMapper)
{
}
public LabelHandler(IPropertyMapper? mapper, CommandMapper? commandMapper)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaLabel CreatePlatformView()
{
return new SkiaLabel();
}
public static void MapText(LabelHandler handler, ILabel label)
{
handler.PlatformView.Text = label.Text ?? "";
handler.PlatformView.Invalidate();
}
public static void MapTextColor(LabelHandler handler, ILabel label)
{
if (label.TextColor != null)
{
handler.PlatformView.TextColor = label.TextColor.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapFont(LabelHandler handler, ILabel label)
{
var font = label.Font;
if (font.Family != null)
{
handler.PlatformView.FontFamily = font.Family;
}
handler.PlatformView.FontSize = (float)font.Size;
handler.PlatformView.IsBold = font.Weight == FontWeight.Bold;
handler.PlatformView.IsItalic = font.Slant == FontSlant.Italic;
handler.PlatformView.Invalidate();
}
public static void MapHorizontalTextAlignment(LabelHandler handler, ILabel label)
{
handler.PlatformView.HorizontalTextAlignment = label.HorizontalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => TextAlignment.End,
_ => TextAlignment.Start
};
handler.PlatformView.Invalidate();
}
public static void MapVerticalTextAlignment(LabelHandler handler, ILabel label)
{
handler.PlatformView.VerticalTextAlignment = label.VerticalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => TextAlignment.End,
_ => TextAlignment.Center
};
handler.PlatformView.Invalidate();
}
public static void MapLineBreakMode(LabelHandler handler, ILabel label)
{
handler.PlatformView.LineBreakMode = label.LineBreakMode switch
{
Microsoft.Maui.LineBreakMode.NoWrap => LineBreakMode.NoWrap,
Microsoft.Maui.LineBreakMode.WordWrap => LineBreakMode.WordWrap,
Microsoft.Maui.LineBreakMode.CharacterWrap => LineBreakMode.CharacterWrap,
Microsoft.Maui.LineBreakMode.HeadTruncation => LineBreakMode.HeadTruncation,
Microsoft.Maui.LineBreakMode.TailTruncation => LineBreakMode.TailTruncation,
Microsoft.Maui.LineBreakMode.MiddleTruncation => LineBreakMode.MiddleTruncation,
_ => LineBreakMode.TailTruncation
};
handler.PlatformView.Invalidate();
}
public static void MapMaxLines(LabelHandler handler, ILabel label)
{
handler.PlatformView.MaxLines = label.MaxLines;
handler.PlatformView.Invalidate();
}
public static void MapPadding(LabelHandler handler, ILabel label)
{
var padding = label.Padding;
handler.PlatformView.Padding = new SKRect(
(float)padding.Left,
(float)padding.Top,
(float)padding.Right,
(float)padding.Bottom);
handler.PlatformView.Invalidate();
}
public static void MapTextDecorations(LabelHandler handler, ILabel label)
{
var decorations = label.TextDecorations;
handler.PlatformView.IsUnderline = decorations.HasFlag(TextDecorations.Underline);
handler.PlatformView.IsStrikethrough = decorations.HasFlag(TextDecorations.Strikethrough);
handler.PlatformView.Invalidate();
}
public static void MapLineHeight(LabelHandler handler, ILabel label)
{
handler.PlatformView.LineHeight = (float)label.LineHeight;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Label on Linux using Skia rendering.
/// Maps ILabel interface to SkiaLabel platform view.
/// </summary>
public partial class LabelHandler : ViewHandler<ILabel, SkiaLabel>
{
public static IPropertyMapper<ILabel, LabelHandler> Mapper = new PropertyMapper<ILabel, LabelHandler>(ViewHandler.ViewMapper)
{
[nameof(IText.Text)] = MapText,
[nameof(ITextStyle.TextColor)] = MapTextColor,
[nameof(ITextStyle.Font)] = MapFont,
[nameof(ITextStyle.CharacterSpacing)] = MapCharacterSpacing,
[nameof(ITextAlignment.HorizontalTextAlignment)] = MapHorizontalTextAlignment,
[nameof(ITextAlignment.VerticalTextAlignment)] = MapVerticalTextAlignment,
[nameof(ILabel.TextDecorations)] = MapTextDecorations,
[nameof(ILabel.LineHeight)] = MapLineHeight,
[nameof(IPadding.Padding)] = MapPadding,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ILabel, LabelHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public LabelHandler() : base(Mapper, CommandMapper)
{
}
public LabelHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaLabel CreatePlatformView()
{
return new SkiaLabel();
}
public static void MapText(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Text = label.Text ?? string.Empty;
}
public static void MapTextColor(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
if (label.TextColor is not null)
handler.PlatformView.TextColor = label.TextColor.ToSKColor();
}
public static void MapFont(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
var font = label.Font;
if (font.Size > 0)
handler.PlatformView.FontSize = (float)font.Size;
if (!string.IsNullOrEmpty(font.Family))
handler.PlatformView.FontFamily = font.Family;
handler.PlatformView.IsBold = font.Weight >= FontWeight.Bold;
handler.PlatformView.IsItalic = font.Slant == FontSlant.Italic || font.Slant == FontSlant.Oblique;
}
public static void MapCharacterSpacing(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
handler.PlatformView.CharacterSpacing = (float)label.CharacterSpacing;
}
public static void MapHorizontalTextAlignment(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
// Map MAUI TextAlignment to our internal TextAlignment
handler.PlatformView.HorizontalTextAlignment = label.HorizontalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => Platform.TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => Platform.TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => Platform.TextAlignment.End,
_ => Platform.TextAlignment.Start
};
}
public static void MapVerticalTextAlignment(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
handler.PlatformView.VerticalTextAlignment = label.VerticalTextAlignment switch
{
Microsoft.Maui.TextAlignment.Start => Platform.TextAlignment.Start,
Microsoft.Maui.TextAlignment.Center => Platform.TextAlignment.Center,
Microsoft.Maui.TextAlignment.End => Platform.TextAlignment.End,
_ => Platform.TextAlignment.Center
};
}
public static void MapTextDecorations(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsUnderline = (label.TextDecorations & TextDecorations.Underline) != 0;
handler.PlatformView.IsStrikethrough = (label.TextDecorations & TextDecorations.Strikethrough) != 0;
}
public static void MapLineHeight(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
handler.PlatformView.LineHeight = (float)label.LineHeight;
}
public static void MapPadding(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
var padding = label.Padding;
handler.PlatformView.Padding = new SKRect(
(float)padding.Left,
(float)padding.Top,
(float)padding.Right,
(float)padding.Bottom);
}
public static void MapBackground(LabelHandler handler, ILabel label)
{
if (handler.PlatformView is null) return;
if (label.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for Layout controls.
/// </summary>
public partial class LayoutHandler : ViewHandler<ILayout, SkiaLayoutView>
{
/// <summary>
/// Maps the property mapper for the handler.
/// </summary>
public static IPropertyMapper<ILayout, LayoutHandler> Mapper = new PropertyMapper<ILayout, LayoutHandler>(ViewHandler.ViewMapper)
{
[nameof(ILayout.Background)] = MapBackground,
[nameof(ILayout.ClipsToBounds)] = MapClipsToBounds,
};
/// <summary>
/// Maps the command mapper for the handler.
/// </summary>
public static CommandMapper<ILayout, LayoutHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
["Add"] = MapAdd,
["Remove"] = MapRemove,
["Clear"] = MapClear,
["Insert"] = MapInsert,
["Update"] = MapUpdate,
["UpdateZIndex"] = MapUpdateZIndex,
};
public LayoutHandler() : base(Mapper, CommandMapper)
{
}
public LayoutHandler(IPropertyMapper? mapper)
: base(mapper ?? Mapper, CommandMapper)
{
}
public LayoutHandler(IPropertyMapper? mapper, CommandMapper? commandMapper)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
// Return a concrete SkiaStackLayout as the default layout
return new SkiaStackLayout();
}
public static void MapBackground(LayoutHandler handler, ILayout layout)
{
var background = layout.Background;
if (background is SolidColorBrush solidBrush && solidBrush.Color != null)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
handler.PlatformView.Invalidate();
}
public static void MapClipsToBounds(LayoutHandler handler, ILayout layout)
{
handler.PlatformView.ClipToBounds = layout.ClipsToBounds;
handler.PlatformView.Invalidate();
}
public static void MapAdd(LayoutHandler handler, ILayout layout, object? arg)
{
if (arg is LayoutHandlerUpdate update)
{
var childHandler = update.View.Handler;
if (childHandler?.PlatformView is SkiaView skiaView)
{
handler.PlatformView.InsertChild(update.Index, skiaView);
}
}
}
public static void MapRemove(LayoutHandler handler, ILayout layout, object? arg)
{
if (arg is LayoutHandlerUpdate update)
{
handler.PlatformView.RemoveChildAt(update.Index);
}
}
public static void MapClear(LayoutHandler handler, ILayout layout, object? arg)
{
handler.PlatformView.ClearChildren();
}
public static void MapInsert(LayoutHandler handler, ILayout layout, object? arg)
{
if (arg is LayoutHandlerUpdate update)
{
var childHandler = update.View.Handler;
if (childHandler?.PlatformView is SkiaView skiaView)
{
handler.PlatformView.InsertChild(update.Index, skiaView);
}
}
}
public static void MapUpdate(LayoutHandler handler, ILayout layout, object? arg)
{
handler.PlatformView.InvalidateMeasure();
handler.PlatformView.Invalidate();
}
public static void MapUpdateZIndex(LayoutHandler handler, ILayout layout, object? arg)
{
// Z-index is handled by child order for now
handler.PlatformView.Invalidate();
}
}
/// <summary>
/// Update information for layout operations.
/// </summary>
public class LayoutHandlerUpdate
{
public int Index { get; }
public IView View { get; }
public LayoutHandlerUpdate(int index, IView view)
{
Index = index;
View = view;
}
}
/// <summary>
/// Linux handler for StackLayout.
/// </summary>
public partial class StackLayoutHandler : LayoutHandler
{
public static new IPropertyMapper<IStackLayout, StackLayoutHandler> Mapper = new PropertyMapper<IStackLayout, StackLayoutHandler>(LayoutHandler.Mapper)
{
[nameof(IStackLayout.Spacing)] = MapSpacing,
};
public StackLayoutHandler() : base(Mapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaStackLayout();
}
public static void MapSpacing(StackLayoutHandler handler, IStackLayout layout)
{
if (handler.PlatformView is SkiaStackLayout stackLayout)
{
stackLayout.Spacing = (float)layout.Spacing;
stackLayout.Invalidate();
}
}
}
/// <summary>
/// Linux handler for HorizontalStackLayout.
/// </summary>
public class HorizontalStackLayoutHandler : StackLayoutHandler
{
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaStackLayout { Orientation = StackOrientation.Horizontal };
}
}
/// <summary>
/// Linux handler for VerticalStackLayout.
/// </summary>
public class VerticalStackLayoutHandler : StackLayoutHandler
{
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaStackLayout { Orientation = StackOrientation.Vertical };
}
}
/// <summary>
/// Linux handler for Grid.
/// </summary>
public partial class GridHandler : LayoutHandler
{
public static new IPropertyMapper<IGridLayout, GridHandler> Mapper = new PropertyMapper<IGridLayout, GridHandler>(LayoutHandler.Mapper)
{
[nameof(IGridLayout.ColumnSpacing)] = MapColumnSpacing,
[nameof(IGridLayout.RowSpacing)] = MapRowSpacing,
};
public GridHandler() : base(Mapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaGrid();
}
public static void MapColumnSpacing(GridHandler handler, IGridLayout layout)
{
if (handler.PlatformView is SkiaGrid grid)
{
grid.ColumnSpacing = (float)layout.ColumnSpacing;
grid.Invalidate();
}
}
public static void MapRowSpacing(GridHandler handler, IGridLayout layout)
{
if (handler.PlatformView is SkiaGrid grid)
{
grid.RowSpacing = (float)layout.RowSpacing;
grid.Invalidate();
}
}
}
/// <summary>
/// Linux handler for AbsoluteLayout.
/// </summary>
public partial class AbsoluteLayoutHandler : LayoutHandler
{
public AbsoluteLayoutHandler() : base(Mapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaAbsoluteLayout();
}
}
/// <summary>
/// Linux handler for ScrollView.
/// </summary>
public partial class ScrollViewHandler : ViewHandler<IScrollView, SkiaScrollView>
{
public static IPropertyMapper<IScrollView, ScrollViewHandler> Mapper = new PropertyMapper<IScrollView, ScrollViewHandler>(ViewHandler.ViewMapper)
{
[nameof(IScrollView.Content)] = MapContent,
[nameof(IScrollView.HorizontalScrollBarVisibility)] = MapHorizontalScrollBarVisibility,
[nameof(IScrollView.VerticalScrollBarVisibility)] = MapVerticalScrollBarVisibility,
[nameof(IScrollView.Orientation)] = MapOrientation,
};
public static CommandMapper<IScrollView, ScrollViewHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
[nameof(IScrollView.RequestScrollTo)] = MapRequestScrollTo,
};
public ScrollViewHandler() : base(Mapper, CommandMapper)
{
}
protected override SkiaScrollView CreatePlatformView()
{
return new SkiaScrollView();
}
protected override void ConnectHandler(SkiaScrollView platformView)
{
base.ConnectHandler(platformView);
platformView.Scrolled += OnScrolled;
}
protected override void DisconnectHandler(SkiaScrollView platformView)
{
platformView.Scrolled -= OnScrolled;
base.DisconnectHandler(platformView);
}
private void OnScrolled(object? sender, ScrolledEventArgs e)
{
VirtualView?.ScrollFinished();
}
public static void MapContent(ScrollViewHandler handler, IScrollView scrollView)
{
if (scrollView.PresentedContent?.Handler?.PlatformView is SkiaView content)
{
handler.PlatformView.Content = content;
}
else
{
handler.PlatformView.Content = null;
}
}
public static void MapHorizontalScrollBarVisibility(ScrollViewHandler handler, IScrollView scrollView)
{
handler.PlatformView.HorizontalScrollBarVisibility = scrollView.HorizontalScrollBarVisibility switch
{
Microsoft.Maui.ScrollBarVisibility.Always => ScrollBarVisibility.Always,
Microsoft.Maui.ScrollBarVisibility.Never => ScrollBarVisibility.Never,
_ => ScrollBarVisibility.Auto
};
}
public static void MapVerticalScrollBarVisibility(ScrollViewHandler handler, IScrollView scrollView)
{
handler.PlatformView.VerticalScrollBarVisibility = scrollView.VerticalScrollBarVisibility switch
{
Microsoft.Maui.ScrollBarVisibility.Always => ScrollBarVisibility.Always,
Microsoft.Maui.ScrollBarVisibility.Never => ScrollBarVisibility.Never,
_ => ScrollBarVisibility.Auto
};
}
public static void MapOrientation(ScrollViewHandler handler, IScrollView scrollView)
{
handler.PlatformView.Orientation = scrollView.Orientation switch
{
Microsoft.Maui.ScrollOrientation.Horizontal => ScrollOrientation.Horizontal,
Microsoft.Maui.ScrollOrientation.Both => ScrollOrientation.Both,
Microsoft.Maui.ScrollOrientation.Neither => ScrollOrientation.Neither,
_ => ScrollOrientation.Vertical
};
}
public static void MapRequestScrollTo(ScrollViewHandler handler, IScrollView scrollView, object? arg)
{
if (arg is ScrollToRequest request)
{
handler.PlatformView.ScrollTo(
(float)request.HorizontalOffset,
(float)request.VerticalOffset,
request.Instant == false);
}
}
}
/// <summary>
/// Scroll to request.
/// </summary>
public class ScrollToRequest
{
public double HorizontalOffset { get; set; }
public double VerticalOffset { get; set; }
public bool Instant { get; set; }
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Layout on Linux using Skia rendering.
/// Maps ILayout interface to SkiaLayoutView platform view.
/// </summary>
public partial class LayoutHandler : ViewHandler<ILayout, SkiaLayoutView>
{
public static IPropertyMapper<ILayout, LayoutHandler> Mapper = new PropertyMapper<ILayout, LayoutHandler>(ViewHandler.ViewMapper)
{
[nameof(ILayout.ClipsToBounds)] = MapClipsToBounds,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ILayout, LayoutHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
["Add"] = MapAdd,
["Remove"] = MapRemove,
["Clear"] = MapClear,
["Insert"] = MapInsert,
["Update"] = MapUpdate,
};
public LayoutHandler() : base(Mapper, CommandMapper)
{
}
public LayoutHandler(IPropertyMapper? mapper = null, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaStackLayout();
}
public static void MapClipsToBounds(LayoutHandler handler, ILayout layout)
{
if (handler.PlatformView == null) return;
handler.PlatformView.ClipToBounds = layout.ClipsToBounds;
}
public static void MapBackground(LayoutHandler handler, ILayout layout)
{
if (handler.PlatformView is null) return;
if (layout.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
public static void MapAdd(LayoutHandler handler, ILayout layout, object? arg)
{
if (handler.PlatformView == null || arg is not LayoutHandlerUpdate update)
return;
var index = update.Index;
var child = update.View;
if (child?.Handler?.PlatformView is SkiaView skiaView)
{
if (index >= 0 && index < handler.PlatformView.Children.Count)
handler.PlatformView.InsertChild(index, skiaView);
else
handler.PlatformView.AddChild(skiaView);
}
}
public static void MapRemove(LayoutHandler handler, ILayout layout, object? arg)
{
if (handler.PlatformView == null || arg is not LayoutHandlerUpdate update)
return;
var index = update.Index;
if (index >= 0 && index < handler.PlatformView.Children.Count)
{
handler.PlatformView.RemoveChildAt(index);
}
}
public static void MapClear(LayoutHandler handler, ILayout layout, object? arg)
{
handler.PlatformView?.ClearChildren();
}
public static void MapInsert(LayoutHandler handler, ILayout layout, object? arg)
{
MapAdd(handler, layout, arg);
}
public static void MapUpdate(LayoutHandler handler, ILayout layout, object? arg)
{
// Force re-layout
handler.PlatformView?.InvalidateMeasure();
}
}
/// <summary>
/// Update payload for layout changes.
/// </summary>
public class LayoutHandlerUpdate
{
public int Index { get; }
public IView? View { get; }
public LayoutHandlerUpdate(int index, IView? view)
{
Index = index;
View = view;
}
}
/// <summary>
/// Handler for StackLayout on Linux.
/// </summary>
public partial class StackLayoutHandler : LayoutHandler
{
public static new IPropertyMapper<IStackLayout, StackLayoutHandler> Mapper = new PropertyMapper<IStackLayout, StackLayoutHandler>(LayoutHandler.Mapper)
{
[nameof(IStackLayout.Spacing)] = MapSpacing,
};
public StackLayoutHandler() : base(Mapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaStackLayout();
}
public static void MapSpacing(StackLayoutHandler handler, IStackLayout layout)
{
if (handler.PlatformView is SkiaStackLayout stackLayout)
{
stackLayout.Spacing = (float)layout.Spacing;
}
}
}
/// <summary>
/// Handler for Grid on Linux.
/// </summary>
public partial class GridHandler : LayoutHandler
{
public static new IPropertyMapper<IGridLayout, GridHandler> Mapper = new PropertyMapper<IGridLayout, GridHandler>(LayoutHandler.Mapper)
{
[nameof(IGridLayout.RowSpacing)] = MapRowSpacing,
[nameof(IGridLayout.ColumnSpacing)] = MapColumnSpacing,
};
public GridHandler() : base(Mapper)
{
}
protected override SkiaLayoutView CreatePlatformView()
{
return new SkiaGrid();
}
public static void MapRowSpacing(GridHandler handler, IGridLayout layout)
{
if (handler.PlatformView is SkiaGrid grid)
{
grid.RowSpacing = (float)layout.RowSpacing;
}
}
public static void MapColumnSpacing(GridHandler handler, IGridLayout layout)
{
if (handler.PlatformView is SkiaGrid grid)
{
grid.ColumnSpacing = (float)layout.ColumnSpacing;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for NavigationPage on Linux using Skia rendering.
/// </summary>
public partial class NavigationPageHandler : ViewHandler<NavigationPage, SkiaNavigationPage>
{
public static IPropertyMapper<NavigationPage, NavigationPageHandler> Mapper =
new PropertyMapper<NavigationPage, NavigationPageHandler>(ViewHandler.ViewMapper)
{
[nameof(NavigationPage.BarBackgroundColor)] = MapBarBackgroundColor,
[nameof(NavigationPage.BarBackground)] = MapBarBackground,
[nameof(NavigationPage.BarTextColor)] = MapBarTextColor,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<NavigationPage, NavigationPageHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
[nameof(IStackNavigationView.RequestNavigation)] = MapRequestNavigation,
};
public NavigationPageHandler() : base(Mapper, CommandMapper)
{
}
public NavigationPageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaNavigationPage CreatePlatformView()
{
return new SkiaNavigationPage();
}
protected override void ConnectHandler(SkiaNavigationPage platformView)
{
base.ConnectHandler(platformView);
platformView.Pushed += OnPushed;
platformView.Popped += OnPopped;
platformView.PoppedToRoot += OnPoppedToRoot;
// Set initial root page if exists
if (VirtualView.CurrentPage != null)
{
SetupInitialPage();
}
}
protected override void DisconnectHandler(SkiaNavigationPage platformView)
{
platformView.Pushed -= OnPushed;
platformView.Popped -= OnPopped;
platformView.PoppedToRoot -= OnPoppedToRoot;
base.DisconnectHandler(platformView);
}
private void SetupInitialPage()
{
var currentPage = VirtualView.CurrentPage;
if (currentPage?.Handler?.PlatformView is SkiaPage skiaPage)
{
PlatformView.SetRootPage(skiaPage);
}
}
private void OnPushed(object? sender, NavigationEventArgs e)
{
// Navigation was completed on platform side
}
private void OnPopped(object? sender, NavigationEventArgs e)
{
// Sync back to virtual view if needed
}
private void OnPoppedToRoot(object? sender, NavigationEventArgs e)
{
// Navigation was reset
}
public static void MapBarBackgroundColor(NavigationPageHandler handler, NavigationPage navigationPage)
{
if (handler.PlatformView is null) return;
if (navigationPage.BarBackgroundColor is not null)
{
handler.PlatformView.BarBackgroundColor = navigationPage.BarBackgroundColor.ToSKColor();
}
}
public static void MapBarBackground(NavigationPageHandler handler, NavigationPage navigationPage)
{
if (handler.PlatformView is null) return;
if (navigationPage.BarBackground is SolidColorBrush solidBrush)
{
handler.PlatformView.BarBackgroundColor = solidBrush.Color.ToSKColor();
}
}
public static void MapBarTextColor(NavigationPageHandler handler, NavigationPage navigationPage)
{
if (handler.PlatformView is null) return;
if (navigationPage.BarTextColor is not null)
{
handler.PlatformView.BarTextColor = navigationPage.BarTextColor.ToSKColor();
}
}
public static void MapBackground(NavigationPageHandler handler, NavigationPage navigationPage)
{
if (handler.PlatformView is null) return;
if (navigationPage.Background is SolidColorBrush solidBrush)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
}
public static void MapRequestNavigation(NavigationPageHandler handler, NavigationPage navigationPage, object? args)
{
if (handler.PlatformView is null || args is not NavigationRequest request)
return;
// Handle navigation request
foreach (var page in request.NavigationStack)
{
if (page.Handler?.PlatformView is SkiaPage skiaPage)
{
if (handler.PlatformView.StackDepth == 0)
{
handler.PlatformView.SetRootPage(skiaPage);
}
else
{
handler.PlatformView.Push(skiaPage, request.Animated);
}
}
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Base handler for Page on Linux using Skia rendering.
/// </summary>
public partial class PageHandler : ViewHandler<Page, SkiaPage>
{
public static IPropertyMapper<Page, PageHandler> Mapper =
new PropertyMapper<Page, PageHandler>(ViewHandler.ViewMapper)
{
[nameof(Page.Title)] = MapTitle,
[nameof(Page.BackgroundImageSource)] = MapBackgroundImageSource,
[nameof(Page.Padding)] = MapPadding,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<Page, PageHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public PageHandler() : base(Mapper, CommandMapper)
{
}
public PageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaPage CreatePlatformView()
{
return new SkiaPage();
}
protected override void ConnectHandler(SkiaPage platformView)
{
base.ConnectHandler(platformView);
platformView.Appearing += OnAppearing;
platformView.Disappearing += OnDisappearing;
}
protected override void DisconnectHandler(SkiaPage platformView)
{
platformView.Appearing -= OnAppearing;
platformView.Disappearing -= OnDisappearing;
base.DisconnectHandler(platformView);
}
private void OnAppearing(object? sender, EventArgs e)
{
(VirtualView as IPageController)?.SendAppearing();
}
private void OnDisappearing(object? sender, EventArgs e)
{
(VirtualView as IPageController)?.SendDisappearing();
}
public static void MapTitle(PageHandler handler, Page page)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Title = page.Title ?? "";
}
public static void MapBackgroundImageSource(PageHandler handler, Page page)
{
// Background image would be loaded and set here
// For now, we just invalidate
handler.PlatformView?.Invalidate();
}
public static void MapPadding(PageHandler handler, Page page)
{
if (handler.PlatformView is null) return;
var padding = page.Padding;
handler.PlatformView.PaddingLeft = (float)padding.Left;
handler.PlatformView.PaddingTop = (float)padding.Top;
handler.PlatformView.PaddingRight = (float)padding.Right;
handler.PlatformView.PaddingBottom = (float)padding.Bottom;
}
public static void MapBackground(PageHandler handler, Page page)
{
if (handler.PlatformView is null) return;
if (page.Background is SolidColorBrush solidBrush)
{
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
}
}
}
/// <summary>
/// Handler for ContentPage on Linux using Skia rendering.
/// </summary>
public partial class ContentPageHandler : PageHandler
{
public static new IPropertyMapper<ContentPage, ContentPageHandler> Mapper =
new PropertyMapper<ContentPage, ContentPageHandler>(PageHandler.Mapper)
{
[nameof(ContentPage.Content)] = MapContent,
};
public static new CommandMapper<ContentPage, ContentPageHandler> CommandMapper =
new(PageHandler.CommandMapper)
{
};
public ContentPageHandler() : base(Mapper, CommandMapper)
{
}
public ContentPageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaPage CreatePlatformView()
{
return new SkiaContentPage();
}
public static void MapContent(ContentPageHandler handler, ContentPage page)
{
if (handler.PlatformView is null) return;
// Get the platform view for the content
var content = page.Content;
if (content != null)
{
// The content's handler should provide the platform view
var contentHandler = content.Handler;
if (contentHandler?.PlatformView is SkiaView skiaContent)
{
handler.PlatformView.Content = skiaContent;
}
}
else
{
handler.PlatformView.Content = null;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Picker on Linux using Skia rendering.
/// </summary>
public partial class PickerHandler : ViewHandler<IPicker, SkiaPicker>
{
public static IPropertyMapper<IPicker, PickerHandler> Mapper =
new PropertyMapper<IPicker, PickerHandler>(ViewHandler.ViewMapper)
{
[nameof(IPicker.Title)] = MapTitle,
[nameof(IPicker.TitleColor)] = MapTitleColor,
[nameof(IPicker.SelectedIndex)] = MapSelectedIndex,
[nameof(IPicker.TextColor)] = MapTextColor,
[nameof(IPicker.CharacterSpacing)] = MapCharacterSpacing,
[nameof(IPicker.HorizontalTextAlignment)] = MapHorizontalTextAlignment,
[nameof(IPicker.VerticalTextAlignment)] = MapVerticalTextAlignment,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IPicker, PickerHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public PickerHandler() : base(Mapper, CommandMapper)
{
}
public PickerHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaPicker CreatePlatformView()
{
return new SkiaPicker();
}
protected override void ConnectHandler(SkiaPicker platformView)
{
base.ConnectHandler(platformView);
platformView.SelectedIndexChanged += OnSelectedIndexChanged;
// Load items
ReloadItems();
}
protected override void DisconnectHandler(SkiaPicker platformView)
{
platformView.SelectedIndexChanged -= OnSelectedIndexChanged;
base.DisconnectHandler(platformView);
}
private void OnSelectedIndexChanged(object? sender, EventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
VirtualView.SelectedIndex = PlatformView.SelectedIndex;
}
private void ReloadItems()
{
if (PlatformView is null || VirtualView is null) return;
var items = VirtualView.GetItemsAsArray();
PlatformView.SetItems(items.Select(i => i?.ToString() ?? ""));
}
public static void MapTitle(PickerHandler handler, IPicker picker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Title = picker.Title ?? "";
}
public static void MapTitleColor(PickerHandler handler, IPicker picker)
{
if (handler.PlatformView is null) return;
if (picker.TitleColor is not null)
{
handler.PlatformView.TitleColor = picker.TitleColor.ToSKColor();
}
}
public static void MapSelectedIndex(PickerHandler handler, IPicker picker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.SelectedIndex = picker.SelectedIndex;
}
public static void MapTextColor(PickerHandler handler, IPicker picker)
{
if (handler.PlatformView is null) return;
if (picker.TextColor is not null)
{
handler.PlatformView.TextColor = picker.TextColor.ToSKColor();
}
}
public static void MapCharacterSpacing(PickerHandler handler, IPicker picker)
{
// Character spacing could be implemented with custom text rendering
}
public static void MapHorizontalTextAlignment(PickerHandler handler, IPicker picker)
{
// Text alignment would require changes to SkiaPicker drawing
}
public static void MapVerticalTextAlignment(PickerHandler handler, IPicker picker)
{
// Text alignment would require changes to SkiaPicker drawing
}
public static void MapBackground(PickerHandler handler, IPicker picker)
{
if (handler.PlatformView is null) return;
if (picker.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for ProgressBar control.
/// </summary>
public partial class ProgressBarHandler : ViewHandler<IProgress, SkiaProgressBar>
{
public static IPropertyMapper<IProgress, ProgressBarHandler> Mapper = new PropertyMapper<IProgress, ProgressBarHandler>(ViewHandler.ViewMapper)
{
[nameof(IProgress.Progress)] = MapProgress,
[nameof(IProgress.ProgressColor)] = MapProgressColor,
[nameof(IView.IsEnabled)] = MapIsEnabled,
};
public static CommandMapper<IProgress, ProgressBarHandler> CommandMapper = new(ViewHandler.ViewCommandMapper);
public ProgressBarHandler() : base(Mapper, CommandMapper) { }
protected override SkiaProgressBar CreatePlatformView() => new SkiaProgressBar();
public static void MapProgress(ProgressBarHandler handler, IProgress progress)
{
handler.PlatformView.Progress = progress.Progress;
}
public static void MapProgressColor(ProgressBarHandler handler, IProgress progress)
{
if (progress.ProgressColor != null)
handler.PlatformView.ProgressColor = progress.ProgressColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(ProgressBarHandler handler, IProgress progress)
{
handler.PlatformView.IsEnabled = progress.IsEnabled;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for ProgressBar on Linux using Skia rendering.
/// Maps IProgress interface to SkiaProgressBar platform view.
/// IProgress has: Progress (0-1), ProgressColor
/// </summary>
public partial class ProgressBarHandler : ViewHandler<IProgress, SkiaProgressBar>
{
public static IPropertyMapper<IProgress, ProgressBarHandler> Mapper = new PropertyMapper<IProgress, ProgressBarHandler>(ViewHandler.ViewMapper)
{
[nameof(IProgress.Progress)] = MapProgress,
[nameof(IProgress.ProgressColor)] = MapProgressColor,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IProgress, ProgressBarHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ProgressBarHandler() : base(Mapper, CommandMapper)
{
}
public ProgressBarHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaProgressBar CreatePlatformView()
{
return new SkiaProgressBar();
}
public static void MapProgress(ProgressBarHandler handler, IProgress progress)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Progress = Math.Clamp(progress.Progress, 0.0, 1.0);
}
public static void MapProgressColor(ProgressBarHandler handler, IProgress progress)
{
if (handler.PlatformView is null) return;
if (progress.ProgressColor is not null)
handler.PlatformView.ProgressColor = progress.ProgressColor.ToSKColor();
}
public static void MapBackground(ProgressBarHandler handler, IProgress progress)
{
if (handler.PlatformView is null) return;
if (progress.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for RadioButton on Linux using Skia rendering.
/// </summary>
public partial class RadioButtonHandler : ViewHandler<IRadioButton, SkiaRadioButton>
{
public static IPropertyMapper<IRadioButton, RadioButtonHandler> Mapper =
new PropertyMapper<IRadioButton, RadioButtonHandler>(ViewHandler.ViewMapper)
{
[nameof(IRadioButton.IsChecked)] = MapIsChecked,
[nameof(ITextStyle.TextColor)] = MapTextColor,
[nameof(ITextStyle.Font)] = MapFont,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IRadioButton, RadioButtonHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public RadioButtonHandler() : base(Mapper, CommandMapper)
{
}
public RadioButtonHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaRadioButton CreatePlatformView()
{
return new SkiaRadioButton();
}
protected override void ConnectHandler(SkiaRadioButton platformView)
{
base.ConnectHandler(platformView);
platformView.CheckedChanged += OnCheckedChanged;
// Set content if available
if (VirtualView is RadioButton rb)
{
platformView.Content = rb.Content?.ToString() ?? "";
platformView.GroupName = rb.GroupName;
platformView.Value = rb.Value;
}
}
protected override void DisconnectHandler(SkiaRadioButton platformView)
{
platformView.CheckedChanged -= OnCheckedChanged;
base.DisconnectHandler(platformView);
}
private void OnCheckedChanged(object? sender, EventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
VirtualView.IsChecked = PlatformView.IsChecked;
}
public static void MapIsChecked(RadioButtonHandler handler, IRadioButton radioButton)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsChecked = radioButton.IsChecked;
}
public static void MapTextColor(RadioButtonHandler handler, IRadioButton radioButton)
{
if (handler.PlatformView is null) return;
if (radioButton.TextColor is not null)
{
handler.PlatformView.TextColor = radioButton.TextColor.ToSKColor();
}
}
public static void MapFont(RadioButtonHandler handler, IRadioButton radioButton)
{
if (handler.PlatformView is null) return;
if (radioButton.Font.Size > 0)
{
handler.PlatformView.FontSize = (float)radioButton.Font.Size;
}
}
public static void MapBackground(RadioButtonHandler handler, IRadioButton radioButton)
{
if (handler.PlatformView is null) return;
if (radioButton.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for SearchBar control.
/// </summary>
public partial class SearchBarHandler : ViewHandler<ISearchBar, SkiaSearchBar>
{
public static IPropertyMapper<ISearchBar, SearchBarHandler> Mapper = new PropertyMapper<ISearchBar, SearchBarHandler>(ViewHandler.ViewMapper)
{
[nameof(ISearchBar.Text)] = MapText,
[nameof(ISearchBar.Placeholder)] = MapPlaceholder,
[nameof(ISearchBar.PlaceholderColor)] = MapPlaceholderColor,
[nameof(ISearchBar.TextColor)] = MapTextColor,
[nameof(ISearchBar.Font)] = MapFont,
[nameof(IView.IsEnabled)] = MapIsEnabled,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ISearchBar, SearchBarHandler> CommandMapper = new(ViewHandler.ViewCommandMapper);
public SearchBarHandler() : base(Mapper, CommandMapper) { }
protected override SkiaSearchBar CreatePlatformView() => new SkiaSearchBar();
protected override void ConnectHandler(SkiaSearchBar platformView)
{
base.ConnectHandler(platformView);
platformView.TextChanged += OnTextChanged;
platformView.SearchButtonPressed += OnSearchButtonPressed;
}
protected override void DisconnectHandler(SkiaSearchBar platformView)
{
platformView.TextChanged -= OnTextChanged;
platformView.SearchButtonPressed -= OnSearchButtonPressed;
base.DisconnectHandler(platformView);
}
private void OnTextChanged(object? sender, TextChangedEventArgs e)
{
if (VirtualView != null && VirtualView.Text != e.NewText)
{
VirtualView.Text = e.NewText;
}
}
private void OnSearchButtonPressed(object? sender, EventArgs e)
{
VirtualView?.SearchButtonPressed();
}
public static void MapText(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView.Text != searchBar.Text)
{
handler.PlatformView.Text = searchBar.Text ?? "";
}
}
public static void MapPlaceholder(SearchBarHandler handler, ISearchBar searchBar)
{
handler.PlatformView.Placeholder = searchBar.Placeholder ?? "";
handler.PlatformView.Invalidate();
}
public static void MapPlaceholderColor(SearchBarHandler handler, ISearchBar searchBar)
{
if (searchBar.PlaceholderColor != null)
handler.PlatformView.PlaceholderColor = searchBar.PlaceholderColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapTextColor(SearchBarHandler handler, ISearchBar searchBar)
{
if (searchBar.TextColor != null)
handler.PlatformView.TextColor = searchBar.TextColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapFont(SearchBarHandler handler, ISearchBar searchBar)
{
var font = searchBar.Font;
if (font.Family != null)
handler.PlatformView.FontFamily = font.Family;
handler.PlatformView.FontSize = (float)font.Size;
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(SearchBarHandler handler, ISearchBar searchBar)
{
handler.PlatformView.IsEnabled = searchBar.IsEnabled;
handler.PlatformView.Invalidate();
}
public static void MapBackground(SearchBarHandler handler, ISearchBar searchBar)
{
if (searchBar.Background is SolidColorBrush solidBrush && solidBrush.Color != null)
handler.PlatformView.BackgroundColor = solidBrush.Color.ToSKColor();
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for SearchBar on Linux using Skia rendering.
/// Maps ISearchBar interface to SkiaSearchBar platform view.
/// </summary>
public partial class SearchBarHandler : ViewHandler<ISearchBar, SkiaSearchBar>
{
public static IPropertyMapper<ISearchBar, SearchBarHandler> Mapper = new PropertyMapper<ISearchBar, SearchBarHandler>(ViewHandler.ViewMapper)
{
[nameof(ITextInput.Text)] = MapText,
[nameof(ITextStyle.TextColor)] = MapTextColor,
[nameof(ITextStyle.Font)] = MapFont,
[nameof(IPlaceholder.Placeholder)] = MapPlaceholder,
[nameof(IPlaceholder.PlaceholderColor)] = MapPlaceholderColor,
[nameof(ISearchBar.CancelButtonColor)] = MapCancelButtonColor,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ISearchBar, SearchBarHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public SearchBarHandler() : base(Mapper, CommandMapper)
{
}
public SearchBarHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaSearchBar CreatePlatformView()
{
return new SkiaSearchBar();
}
protected override void ConnectHandler(SkiaSearchBar platformView)
{
base.ConnectHandler(platformView);
platformView.TextChanged += OnTextChanged;
platformView.SearchButtonPressed += OnSearchButtonPressed;
}
protected override void DisconnectHandler(SkiaSearchBar platformView)
{
platformView.TextChanged -= OnTextChanged;
platformView.SearchButtonPressed -= OnSearchButtonPressed;
base.DisconnectHandler(platformView);
}
private void OnTextChanged(object? sender, TextChangedEventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
if (VirtualView.Text != e.NewTextValue)
{
VirtualView.Text = e.NewTextValue ?? string.Empty;
}
}
private void OnSearchButtonPressed(object? sender, EventArgs e)
{
VirtualView?.SearchButtonPressed();
}
public static void MapText(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
if (handler.PlatformView.Text != searchBar.Text)
handler.PlatformView.Text = searchBar.Text ?? string.Empty;
}
public static void MapTextColor(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
if (searchBar.TextColor is not null)
handler.PlatformView.TextColor = searchBar.TextColor.ToSKColor();
}
public static void MapFont(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
var font = searchBar.Font;
if (font.Size > 0)
handler.PlatformView.FontSize = (float)font.Size;
if (!string.IsNullOrEmpty(font.Family))
handler.PlatformView.FontFamily = font.Family;
}
public static void MapPlaceholder(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Placeholder = searchBar.Placeholder ?? string.Empty;
}
public static void MapPlaceholderColor(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
if (searchBar.PlaceholderColor is not null)
handler.PlatformView.PlaceholderColor = searchBar.PlaceholderColor.ToSKColor();
}
public static void MapCancelButtonColor(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
// CancelButtonColor maps to ClearButtonColor
if (searchBar.CancelButtonColor is not null)
handler.PlatformView.ClearButtonColor = searchBar.CancelButtonColor.ToSKColor();
}
public static void MapBackground(SearchBarHandler handler, ISearchBar searchBar)
{
if (handler.PlatformView is null) return;
if (searchBar.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Shell on Linux using Skia rendering.
/// </summary>
public partial class ShellHandler : ViewHandler<IView, SkiaShell>
{
public static IPropertyMapper<IView, ShellHandler> Mapper = new PropertyMapper<IView, ShellHandler>(ViewHandler.ViewMapper)
{
};
public static CommandMapper<IView, ShellHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public ShellHandler() : base(Mapper, CommandMapper)
{
}
public ShellHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaShell CreatePlatformView()
{
return new SkiaShell();
}
protected override void ConnectHandler(SkiaShell platformView)
{
base.ConnectHandler(platformView);
platformView.FlyoutIsPresentedChanged += OnFlyoutIsPresentedChanged;
platformView.Navigated += OnNavigated;
}
protected override void DisconnectHandler(SkiaShell platformView)
{
platformView.FlyoutIsPresentedChanged -= OnFlyoutIsPresentedChanged;
platformView.Navigated -= OnNavigated;
base.DisconnectHandler(platformView);
}
private void OnFlyoutIsPresentedChanged(object? sender, EventArgs e)
{
// Sync flyout state to virtual view
}
private void OnNavigated(object? sender, ShellNavigationEventArgs e)
{
// Handle navigation events
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for Slider control.
/// </summary>
public partial class SliderHandler : ViewHandler<ISlider, SkiaSlider>
{
public static IPropertyMapper<ISlider, SliderHandler> Mapper = new PropertyMapper<ISlider, SliderHandler>(ViewHandler.ViewMapper)
{
[nameof(ISlider.Minimum)] = MapMinimum,
[nameof(ISlider.Maximum)] = MapMaximum,
[nameof(ISlider.Value)] = MapValue,
[nameof(ISlider.MinimumTrackColor)] = MapMinimumTrackColor,
[nameof(ISlider.MaximumTrackColor)] = MapMaximumTrackColor,
[nameof(ISlider.ThumbColor)] = MapThumbColor,
[nameof(IView.IsEnabled)] = MapIsEnabled,
};
public static CommandMapper<ISlider, SliderHandler> CommandMapper = new(ViewHandler.ViewCommandMapper);
public SliderHandler() : base(Mapper, CommandMapper) { }
protected override SkiaSlider CreatePlatformView() => new SkiaSlider();
protected override void ConnectHandler(SkiaSlider platformView)
{
base.ConnectHandler(platformView);
platformView.ValueChanged += OnValueChanged;
platformView.DragStarted += OnDragStarted;
platformView.DragCompleted += OnDragCompleted;
}
protected override void DisconnectHandler(SkiaSlider platformView)
{
platformView.ValueChanged -= OnValueChanged;
platformView.DragStarted -= OnDragStarted;
platformView.DragCompleted -= OnDragCompleted;
base.DisconnectHandler(platformView);
}
private void OnValueChanged(object? sender, SliderValueChangedEventArgs e)
{
if (VirtualView != null && Math.Abs(VirtualView.Value - e.NewValue) > 0.001)
{
VirtualView.Value = e.NewValue;
}
}
private void OnDragStarted(object? sender, EventArgs e) => VirtualView?.DragStarted();
private void OnDragCompleted(object? sender, EventArgs e) => VirtualView?.DragCompleted();
public static void MapMinimum(SliderHandler handler, ISlider slider)
{
handler.PlatformView.Minimum = slider.Minimum;
handler.PlatformView.Invalidate();
}
public static void MapMaximum(SliderHandler handler, ISlider slider)
{
handler.PlatformView.Maximum = slider.Maximum;
handler.PlatformView.Invalidate();
}
public static void MapValue(SliderHandler handler, ISlider slider)
{
if (Math.Abs(handler.PlatformView.Value - slider.Value) > 0.001)
{
handler.PlatformView.Value = slider.Value;
}
}
public static void MapMinimumTrackColor(SliderHandler handler, ISlider slider)
{
if (slider.MinimumTrackColor != null)
handler.PlatformView.ActiveTrackColor = slider.MinimumTrackColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapMaximumTrackColor(SliderHandler handler, ISlider slider)
{
if (slider.MaximumTrackColor != null)
handler.PlatformView.TrackColor = slider.MaximumTrackColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapThumbColor(SliderHandler handler, ISlider slider)
{
if (slider.ThumbColor != null)
handler.PlatformView.ThumbColor = slider.ThumbColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(SliderHandler handler, ISlider slider)
{
handler.PlatformView.IsEnabled = slider.IsEnabled;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Slider on Linux using Skia rendering.
/// Maps ISlider interface to SkiaSlider platform view.
/// </summary>
public partial class SliderHandler : ViewHandler<ISlider, SkiaSlider>
{
public static IPropertyMapper<ISlider, SliderHandler> Mapper = new PropertyMapper<ISlider, SliderHandler>(ViewHandler.ViewMapper)
{
[nameof(IRange.Minimum)] = MapMinimum,
[nameof(IRange.Maximum)] = MapMaximum,
[nameof(IRange.Value)] = MapValue,
[nameof(ISlider.MinimumTrackColor)] = MapMinimumTrackColor,
[nameof(ISlider.MaximumTrackColor)] = MapMaximumTrackColor,
[nameof(ISlider.ThumbColor)] = MapThumbColor,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ISlider, SliderHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public SliderHandler() : base(Mapper, CommandMapper)
{
}
public SliderHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaSlider CreatePlatformView()
{
return new SkiaSlider();
}
protected override void ConnectHandler(SkiaSlider platformView)
{
base.ConnectHandler(platformView);
platformView.ValueChanged += OnValueChanged;
platformView.DragStarted += OnDragStarted;
platformView.DragCompleted += OnDragCompleted;
}
protected override void DisconnectHandler(SkiaSlider platformView)
{
platformView.ValueChanged -= OnValueChanged;
platformView.DragStarted -= OnDragStarted;
platformView.DragCompleted -= OnDragCompleted;
base.DisconnectHandler(platformView);
}
private void OnValueChanged(object? sender, SliderValueChangedEventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
if (Math.Abs(VirtualView.Value - e.NewValue) > 0.0001)
{
VirtualView.Value = e.NewValue;
}
}
private void OnDragStarted(object? sender, EventArgs e)
{
VirtualView?.DragStarted();
}
private void OnDragCompleted(object? sender, EventArgs e)
{
VirtualView?.DragCompleted();
}
public static void MapMinimum(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Minimum = slider.Minimum;
}
public static void MapMaximum(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Maximum = slider.Maximum;
}
public static void MapValue(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
if (Math.Abs(handler.PlatformView.Value - slider.Value) > 0.0001)
handler.PlatformView.Value = slider.Value;
}
public static void MapMinimumTrackColor(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
// MinimumTrackColor maps to ActiveTrackColor (the filled portion)
if (slider.MinimumTrackColor is not null)
handler.PlatformView.ActiveTrackColor = slider.MinimumTrackColor.ToSKColor();
}
public static void MapMaximumTrackColor(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
// MaximumTrackColor maps to TrackColor (the unfilled portion)
if (slider.MaximumTrackColor is not null)
handler.PlatformView.TrackColor = slider.MaximumTrackColor.ToSKColor();
}
public static void MapThumbColor(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
if (slider.ThumbColor is not null)
handler.PlatformView.ThumbColor = slider.ThumbColor.ToSKColor();
}
public static void MapBackground(SliderHandler handler, ISlider slider)
{
if (handler.PlatformView is null) return;
if (slider.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Stepper on Linux using Skia rendering.
/// </summary>
public partial class StepperHandler : ViewHandler<IStepper, SkiaStepper>
{
public static IPropertyMapper<IStepper, StepperHandler> Mapper =
new PropertyMapper<IStepper, StepperHandler>(ViewHandler.ViewMapper)
{
[nameof(IStepper.Value)] = MapValue,
[nameof(IStepper.Minimum)] = MapMinimum,
[nameof(IStepper.Maximum)] = MapMaximum,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IStepper, StepperHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public StepperHandler() : base(Mapper, CommandMapper)
{
}
public StepperHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaStepper CreatePlatformView()
{
return new SkiaStepper();
}
protected override void ConnectHandler(SkiaStepper platformView)
{
base.ConnectHandler(platformView);
platformView.ValueChanged += OnValueChanged;
}
protected override void DisconnectHandler(SkiaStepper platformView)
{
platformView.ValueChanged -= OnValueChanged;
base.DisconnectHandler(platformView);
}
private void OnValueChanged(object? sender, EventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
VirtualView.Value = PlatformView.Value;
}
public static void MapValue(StepperHandler handler, IStepper stepper)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Value = stepper.Value;
}
public static void MapMinimum(StepperHandler handler, IStepper stepper)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Minimum = stepper.Minimum;
}
public static void MapMaximum(StepperHandler handler, IStepper stepper)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Maximum = stepper.Maximum;
}
public static void MapBackground(StepperHandler handler, IStepper stepper)
{
if (handler.PlatformView is null) return;
if (stepper.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Linux handler for Switch control.
/// </summary>
public partial class SwitchHandler : ViewHandler<ISwitch, SkiaSwitch>
{
public static IPropertyMapper<ISwitch, SwitchHandler> Mapper = new PropertyMapper<ISwitch, SwitchHandler>(ViewHandler.ViewMapper)
{
[nameof(ISwitch.IsOn)] = MapIsOn,
[nameof(ISwitch.TrackColor)] = MapTrackColor,
[nameof(ISwitch.ThumbColor)] = MapThumbColor,
[nameof(IView.IsEnabled)] = MapIsEnabled,
};
public static CommandMapper<ISwitch, SwitchHandler> CommandMapper = new(ViewHandler.ViewCommandMapper);
public SwitchHandler() : base(Mapper, CommandMapper) { }
protected override SkiaSwitch CreatePlatformView() => new SkiaSwitch();
protected override void ConnectHandler(SkiaSwitch platformView)
{
base.ConnectHandler(platformView);
platformView.Toggled += OnToggled;
}
protected override void DisconnectHandler(SkiaSwitch platformView)
{
platformView.Toggled -= OnToggled;
base.DisconnectHandler(platformView);
}
private void OnToggled(object? sender, ToggledEventArgs e)
{
if (VirtualView != null && VirtualView.IsOn != e.Value)
{
VirtualView.IsOn = e.Value;
}
}
public static void MapIsOn(SwitchHandler handler, ISwitch @switch)
{
if (handler.PlatformView.IsOn != @switch.IsOn)
{
handler.PlatformView.IsOn = @switch.IsOn;
}
}
public static void MapTrackColor(SwitchHandler handler, ISwitch @switch)
{
if (@switch.TrackColor != null)
handler.PlatformView.OnTrackColor = @switch.TrackColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapThumbColor(SwitchHandler handler, ISwitch @switch)
{
if (@switch.ThumbColor != null)
handler.PlatformView.ThumbColor = @switch.ThumbColor.ToSKColor();
handler.PlatformView.Invalidate();
}
public static void MapIsEnabled(SwitchHandler handler, ISwitch @switch)
{
handler.PlatformView.IsEnabled = @switch.IsEnabled;
handler.PlatformView.Invalidate();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Switch on Linux using Skia rendering.
/// Maps ISwitch interface to SkiaSwitch platform view.
/// </summary>
public partial class SwitchHandler : ViewHandler<ISwitch, SkiaSwitch>
{
public static IPropertyMapper<ISwitch, SwitchHandler> Mapper = new PropertyMapper<ISwitch, SwitchHandler>(ViewHandler.ViewMapper)
{
[nameof(ISwitch.IsOn)] = MapIsOn,
[nameof(ISwitch.TrackColor)] = MapTrackColor,
[nameof(ISwitch.ThumbColor)] = MapThumbColor,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ISwitch, SwitchHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public SwitchHandler() : base(Mapper, CommandMapper)
{
}
public SwitchHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaSwitch CreatePlatformView()
{
return new SkiaSwitch();
}
protected override void ConnectHandler(SkiaSwitch platformView)
{
base.ConnectHandler(platformView);
platformView.Toggled += OnToggled;
}
protected override void DisconnectHandler(SkiaSwitch platformView)
{
platformView.Toggled -= OnToggled;
base.DisconnectHandler(platformView);
}
private void OnToggled(object? sender, Platform.ToggledEventArgs e)
{
if (VirtualView is not null && VirtualView.IsOn != e.Value)
{
VirtualView.IsOn = e.Value;
}
}
public static void MapIsOn(SwitchHandler handler, ISwitch @switch)
{
if (handler.PlatformView is null) return;
handler.PlatformView.IsOn = @switch.IsOn;
}
public static void MapTrackColor(SwitchHandler handler, ISwitch @switch)
{
if (handler.PlatformView is null) return;
// TrackColor sets both On and Off track colors
if (@switch.TrackColor is not null)
{
var color = @switch.TrackColor.ToSKColor();
handler.PlatformView.OnTrackColor = color;
// Off track could be a lighter version
handler.PlatformView.OffTrackColor = color.WithAlpha(128);
}
}
public static void MapThumbColor(SwitchHandler handler, ISwitch @switch)
{
if (handler.PlatformView is null) return;
if (@switch.ThumbColor is not null)
handler.PlatformView.ThumbColor = @switch.ThumbColor.ToSKColor();
}
public static void MapBackground(SwitchHandler handler, ISwitch @switch)
{
if (handler.PlatformView is null) return;
if (@switch.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for TabbedPage on Linux using Skia rendering.
/// Maps ITabbedView interface to SkiaTabbedPage platform view.
/// </summary>
public partial class TabbedPageHandler : ViewHandler<ITabbedView, SkiaTabbedPage>
{
public static IPropertyMapper<ITabbedView, TabbedPageHandler> Mapper = new PropertyMapper<ITabbedView, TabbedPageHandler>(ViewHandler.ViewMapper)
{
};
public static CommandMapper<ITabbedView, TabbedPageHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
};
public TabbedPageHandler() : base(Mapper, CommandMapper)
{
}
public TabbedPageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaTabbedPage CreatePlatformView()
{
return new SkiaTabbedPage();
}
protected override void ConnectHandler(SkiaTabbedPage platformView)
{
base.ConnectHandler(platformView);
platformView.SelectedIndexChanged += OnSelectedIndexChanged;
}
protected override void DisconnectHandler(SkiaTabbedPage platformView)
{
platformView.SelectedIndexChanged -= OnSelectedIndexChanged;
platformView.ClearTabs();
base.DisconnectHandler(platformView);
}
private void OnSelectedIndexChanged(object? sender, EventArgs e)
{
// Notify the virtual view of selection change
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for TimePicker on Linux using Skia rendering.
/// </summary>
public partial class TimePickerHandler : ViewHandler<ITimePicker, SkiaTimePicker>
{
public static IPropertyMapper<ITimePicker, TimePickerHandler> Mapper =
new PropertyMapper<ITimePicker, TimePickerHandler>(ViewHandler.ViewMapper)
{
[nameof(ITimePicker.Time)] = MapTime,
[nameof(ITimePicker.Format)] = MapFormat,
[nameof(ITimePicker.TextColor)] = MapTextColor,
[nameof(ITimePicker.CharacterSpacing)] = MapCharacterSpacing,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<ITimePicker, TimePickerHandler> CommandMapper =
new(ViewHandler.ViewCommandMapper)
{
};
public TimePickerHandler() : base(Mapper, CommandMapper)
{
}
public TimePickerHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaTimePicker CreatePlatformView()
{
return new SkiaTimePicker();
}
protected override void ConnectHandler(SkiaTimePicker platformView)
{
base.ConnectHandler(platformView);
platformView.TimeSelected += OnTimeSelected;
}
protected override void DisconnectHandler(SkiaTimePicker platformView)
{
platformView.TimeSelected -= OnTimeSelected;
base.DisconnectHandler(platformView);
}
private void OnTimeSelected(object? sender, EventArgs e)
{
if (VirtualView is null || PlatformView is null) return;
VirtualView.Time = PlatformView.Time;
}
public static void MapTime(TimePickerHandler handler, ITimePicker timePicker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Time = timePicker.Time;
}
public static void MapFormat(TimePickerHandler handler, ITimePicker timePicker)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Format = timePicker.Format ?? "t";
}
public static void MapTextColor(TimePickerHandler handler, ITimePicker timePicker)
{
if (handler.PlatformView is null) return;
if (timePicker.TextColor is not null)
{
handler.PlatformView.TextColor = timePicker.TextColor.ToSKColor();
}
}
public static void MapCharacterSpacing(TimePickerHandler handler, ITimePicker timePicker)
{
// Character spacing would require custom text rendering
}
public static void MapBackground(TimePickerHandler handler, ITimePicker timePicker)
{
if (handler.PlatformView is null) return;
if (timePicker.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Controls;
using Microsoft.Maui.Platform;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for Window on Linux.
/// Maps IWindow to the Linux display window system.
/// </summary>
public partial class WindowHandler : ElementHandler<IWindow, SkiaWindow>
{
public static IPropertyMapper<IWindow, WindowHandler> Mapper =
new PropertyMapper<IWindow, WindowHandler>(ElementHandler.ElementMapper)
{
[nameof(IWindow.Title)] = MapTitle,
[nameof(IWindow.Content)] = MapContent,
[nameof(IWindow.X)] = MapX,
[nameof(IWindow.Y)] = MapY,
[nameof(IWindow.Width)] = MapWidth,
[nameof(IWindow.Height)] = MapHeight,
[nameof(IWindow.MinimumWidth)] = MapMinimumWidth,
[nameof(IWindow.MinimumHeight)] = MapMinimumHeight,
[nameof(IWindow.MaximumWidth)] = MapMaximumWidth,
[nameof(IWindow.MaximumHeight)] = MapMaximumHeight,
};
public static CommandMapper<IWindow, WindowHandler> CommandMapper =
new(ElementHandler.ElementCommandMapper)
{
};
public WindowHandler() : base(Mapper, CommandMapper)
{
}
public WindowHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaWindow CreatePlatformElement()
{
return new SkiaWindow();
}
protected override void ConnectHandler(SkiaWindow platformView)
{
base.ConnectHandler(platformView);
platformView.CloseRequested += OnCloseRequested;
platformView.SizeChanged += OnSizeChanged;
}
protected override void DisconnectHandler(SkiaWindow platformView)
{
platformView.CloseRequested -= OnCloseRequested;
platformView.SizeChanged -= OnSizeChanged;
base.DisconnectHandler(platformView);
}
private void OnCloseRequested(object? sender, EventArgs e)
{
VirtualView?.Destroying();
}
private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
{
VirtualView?.FrameChanged(new Rect(0, 0, e.Width, e.Height));
}
public static void MapTitle(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Title = window.Title ?? "MAUI Application";
}
public static void MapContent(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
var content = window.Content;
if (content?.Handler?.PlatformView is SkiaView skiaContent)
{
handler.PlatformView.Content = skiaContent;
}
}
public static void MapX(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.X = (int)window.X;
}
public static void MapY(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Y = (int)window.Y;
}
public static void MapWidth(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Width = (int)window.Width;
}
public static void MapHeight(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Height = (int)window.Height;
}
public static void MapMinimumWidth(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MinWidth = (int)window.MinimumWidth;
}
public static void MapMinimumHeight(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MinHeight = (int)window.MinimumHeight;
}
public static void MapMaximumWidth(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MaxWidth = (int)window.MaximumWidth;
}
public static void MapMaximumHeight(WindowHandler handler, IWindow window)
{
if (handler.PlatformView is null) return;
handler.PlatformView.MaxHeight = (int)window.MaximumHeight;
}
}
/// <summary>
/// Skia window wrapper for Linux display servers.
/// </summary>
public class SkiaWindow
{
private SkiaView? _content;
private string _title = "MAUI Application";
private int _x, _y;
private int _width = 800;
private int _height = 600;
private int _minWidth = 100;
private int _minHeight = 100;
private int _maxWidth = int.MaxValue;
private int _maxHeight = int.MaxValue;
public SkiaView? Content
{
get => _content;
set
{
_content = value;
ContentChanged?.Invoke(this, EventArgs.Empty);
}
}
public string Title
{
get => _title;
set
{
_title = value;
TitleChanged?.Invoke(this, EventArgs.Empty);
}
}
public int X
{
get => _x;
set { _x = value; PositionChanged?.Invoke(this, EventArgs.Empty); }
}
public int Y
{
get => _y;
set { _y = value; PositionChanged?.Invoke(this, EventArgs.Empty); }
}
public int Width
{
get => _width;
set
{
_width = Math.Clamp(value, _minWidth, _maxWidth);
SizeChanged?.Invoke(this, new SizeChangedEventArgs(_width, _height));
}
}
public int Height
{
get => _height;
set
{
_height = Math.Clamp(value, _minHeight, _maxHeight);
SizeChanged?.Invoke(this, new SizeChangedEventArgs(_width, _height));
}
}
public int MinWidth
{
get => _minWidth;
set { _minWidth = value; }
}
public int MinHeight
{
get => _minHeight;
set { _minHeight = value; }
}
public int MaxWidth
{
get => _maxWidth;
set { _maxWidth = value; }
}
public int MaxHeight
{
get => _maxHeight;
set { _maxHeight = value; }
}
public event EventHandler? ContentChanged;
public event EventHandler? TitleChanged;
public event EventHandler? PositionChanged;
public event EventHandler<SizeChangedEventArgs>? SizeChanged;
public event EventHandler? CloseRequested;
public void Close()
{
CloseRequested?.Invoke(this, EventArgs.Empty);
}
}
/// <summary>
/// Event args for window size changes.
/// </summary>
public class SizeChangedEventArgs : EventArgs
{
public int Width { get; }
public int Height { get; }
public SizeChangedEventArgs(int width, int height)
{
Width = width;
Height = height;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Maui.ApplicationModel;
using Microsoft.Maui.ApplicationModel.Communication;
using Microsoft.Maui.ApplicationModel.DataTransfer;
using Microsoft.Maui.Hosting;
using Microsoft.Maui.Platform.Linux.Services;
using Microsoft.Maui.Storage;
using Microsoft.Maui.Platform.Linux.Handlers;
using Microsoft.Maui.Controls;
namespace Microsoft.Maui.Platform.Linux.Hosting;
/// <summary>
/// Extension methods for configuring MAUI applications for Linux.
/// </summary>
public static class LinuxMauiAppBuilderExtensions
{
/// <summary>
/// Configures the MAUI application to run on Linux.
/// </summary>
public static MauiAppBuilder UseLinux(this MauiAppBuilder builder)
{
return builder.UseLinux(configure: null);
}
/// <summary>
/// Configures the MAUI application to run on Linux with options.
/// </summary>
public static MauiAppBuilder UseLinux(this MauiAppBuilder builder, Action<LinuxApplicationOptions>? configure)
{
var options = new LinuxApplicationOptions();
configure?.Invoke(options);
// Register platform services
builder.Services.TryAddSingleton<ILauncher, LauncherService>();
builder.Services.TryAddSingleton<IPreferences, PreferencesService>();
builder.Services.TryAddSingleton<IFilePicker, FilePickerService>();
builder.Services.TryAddSingleton<IClipboard, ClipboardService>();
builder.Services.TryAddSingleton<IShare, ShareService>();
builder.Services.TryAddSingleton<ISecureStorage, SecureStorageService>();
builder.Services.TryAddSingleton<IVersionTracking, VersionTrackingService>();
builder.Services.TryAddSingleton<IAppActions, AppActionsService>();
builder.Services.TryAddSingleton<IBrowser, BrowserService>();
builder.Services.TryAddSingleton<IEmail, EmailService>();
// Register Linux-specific handlers
builder.ConfigureMauiHandlers(handlers =>
{
// Phase 1 - MVP controls
handlers.AddHandler<IButton, ButtonHandler>();
handlers.AddHandler<ILabel, LabelHandler>();
handlers.AddHandler<IEntry, EntryHandler>();
handlers.AddHandler<ICheckBox, CheckBoxHandler>();
handlers.AddHandler<ILayout, LayoutHandler>();
handlers.AddHandler<IStackLayout, StackLayoutHandler>();
handlers.AddHandler<IGridLayout, GridHandler>();
// Phase 2 - Input controls
handlers.AddHandler<ISlider, SliderHandler>();
handlers.AddHandler<ISwitch, SwitchHandler>();
handlers.AddHandler<IProgress, ProgressBarHandler>();
handlers.AddHandler<IActivityIndicator, ActivityIndicatorHandler>();
handlers.AddHandler<ISearchBar, SearchBarHandler>();
// Phase 2 - Image & Graphics
handlers.AddHandler<IImage, ImageHandler>();
handlers.AddHandler<IImageButton, ImageButtonHandler>();
handlers.AddHandler<IGraphicsView, GraphicsViewHandler>();
// Phase 3 - Collection Views
handlers.AddHandler<CollectionView, CollectionViewHandler>();
// Phase 4 - Pages & Navigation
handlers.AddHandler<Page, PageHandler>();
handlers.AddHandler<ContentPage, ContentPageHandler>();
handlers.AddHandler<NavigationPage, NavigationPageHandler>();
// Phase 5 - Advanced Controls
handlers.AddHandler<IPicker, PickerHandler>();
handlers.AddHandler<IDatePicker, DatePickerHandler>();
handlers.AddHandler<ITimePicker, TimePickerHandler>();
handlers.AddHandler<IEditor, EditorHandler>();
// Phase 7 - Additional Controls
handlers.AddHandler<IStepper, StepperHandler>();
handlers.AddHandler<IRadioButton, RadioButtonHandler>();
handlers.AddHandler<IBorderView, BorderHandler>();
// Window handler
handlers.AddHandler<IWindow, WindowHandler>();
});
// Store options for later use
builder.Services.AddSingleton(options);
return builder;
}
}
/// <summary>
/// Handler registration extensions.
/// </summary>
public static class HandlerMappingExtensions
{
/// <summary>
/// Adds a handler for the specified view type.
/// </summary>
public static IMauiHandlersCollection AddHandler<TView, THandler>(
this IMauiHandlersCollection handlers)
where TView : class
where THandler : class
{
handlers.AddHandler(typeof(TView), typeof(THandler));
return handlers;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Maui.Hosting;
using Microsoft.Maui.Controls;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Hosting;
public static class LinuxProgramHost
{
public static void Run<TApp>(string[] args) where TApp : class, IApplication, new()
{
Run<TApp>(args, null);
}
public static void Run<TApp>(string[] args, Action<MauiAppBuilder>? configure) where TApp : class, IApplication, new()
{
var builder = MauiApp.CreateBuilder();
builder.UseLinux();
configure?.Invoke(builder);
builder.UseMauiApp<TApp>();
var mauiApp = builder.Build();
var options = mauiApp.Services.GetService<LinuxApplicationOptions>()
?? new LinuxApplicationOptions();
ParseCommandLineOptions(args, options);
using var linuxApp = new LinuxApplication();
linuxApp.Initialize(options);
// Create comprehensive demo UI with ALL controls
var rootView = CreateComprehensiveDemo();
linuxApp.RootView = rootView;
linuxApp.Run();
}
private static void ParseCommandLineOptions(string[] args, LinuxApplicationOptions options)
{
for (int i = 0; i < args.Length; i++)
{
switch (args[i].ToLowerInvariant())
{
case "--title" when i + 1 < args.Length:
options.Title = args[++i];
break;
case "--width" when i + 1 < args.Length && int.TryParse(args[i + 1], out var w):
options.Width = w;
i++;
break;
case "--height" when i + 1 < args.Length && int.TryParse(args[i + 1], out var h):
options.Height = h;
i++;
break;
}
}
}
private static SkiaView CreateComprehensiveDemo()
{
// Create scrollable container
var scroll = new SkiaScrollView();
var root = new SkiaStackLayout
{
Orientation = StackOrientation.Vertical,
Spacing = 15,
BackgroundColor = new SKColor(0xF5, 0xF5, 0xF5)
};
root.Padding = new SKRect(20, 20, 20, 20);
// ========== TITLE ==========
root.AddChild(new SkiaLabel
{
Text = "MAUI Linux Control Demo",
FontSize = 28,
TextColor = new SKColor(0x1A, 0x23, 0x7E),
IsBold = true
});
root.AddChild(new SkiaLabel
{
Text = "All controls rendered using SkiaSharp on X11",
FontSize = 14,
TextColor = SKColors.Gray
});
// ========== LABELS SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Labels"));
var labelSection = new SkiaStackLayout { Orientation = StackOrientation.Vertical, Spacing = 5 };
labelSection.AddChild(new SkiaLabel { Text = "Normal Label", FontSize = 16, TextColor = SKColors.Black });
labelSection.AddChild(new SkiaLabel { Text = "Bold Label", FontSize = 16, TextColor = SKColors.Black, IsBold = true });
labelSection.AddChild(new SkiaLabel { Text = "Italic Label", FontSize = 16, TextColor = SKColors.Gray, IsItalic = true });
labelSection.AddChild(new SkiaLabel { Text = "Colored Label (Pink)", FontSize = 16, TextColor = new SKColor(0xE9, 0x1E, 0x63) });
root.AddChild(labelSection);
// ========== BUTTONS SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Buttons"));
var buttonSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 10 };
var btnPrimary = new SkiaButton { Text = "Primary", FontSize = 14 };
btnPrimary.BackgroundColor = new SKColor(0x21, 0x96, 0xF3);
btnPrimary.TextColor = SKColors.White;
var clickCount = 0;
btnPrimary.Clicked += (s, e) => { clickCount++; btnPrimary.Text = $"Clicked {clickCount}x"; };
buttonSection.AddChild(btnPrimary);
var btnSuccess = new SkiaButton { Text = "Success", FontSize = 14 };
btnSuccess.BackgroundColor = new SKColor(0x4C, 0xAF, 0x50);
btnSuccess.TextColor = SKColors.White;
buttonSection.AddChild(btnSuccess);
var btnDanger = new SkiaButton { Text = "Danger", FontSize = 14 };
btnDanger.BackgroundColor = new SKColor(0xF4, 0x43, 0x36);
btnDanger.TextColor = SKColors.White;
buttonSection.AddChild(btnDanger);
root.AddChild(buttonSection);
// ========== ENTRY SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Text Entry"));
var entry = new SkiaEntry { Placeholder = "Type here...", FontSize = 14 };
root.AddChild(entry);
// ========== SEARCHBAR SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("SearchBar"));
var searchBar = new SkiaSearchBar { Placeholder = "Search for items..." };
var searchResultLabel = new SkiaLabel { Text = "", FontSize = 12, TextColor = SKColors.Gray };
searchBar.TextChanged += (s, e) => searchResultLabel.Text = $"Searching: {e.NewTextValue}";
searchBar.SearchButtonPressed += (s, e) => searchResultLabel.Text = $"Search submitted: {searchBar.Text}";
root.AddChild(searchBar);
root.AddChild(searchResultLabel);
// ========== EDITOR SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Editor (Multi-line)"));
var editor = new SkiaEditor
{
Placeholder = "Enter multiple lines of text...",
FontSize = 14,
BackgroundColor = SKColors.White
};
root.AddChild(editor);
// ========== CHECKBOX SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("CheckBox"));
var checkSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 20 };
var cb1 = new SkiaCheckBox { IsChecked = true };
checkSection.AddChild(cb1);
checkSection.AddChild(new SkiaLabel { Text = "Checked", FontSize = 14 });
var cb2 = new SkiaCheckBox { IsChecked = false };
checkSection.AddChild(cb2);
checkSection.AddChild(new SkiaLabel { Text = "Unchecked", FontSize = 14 });
root.AddChild(checkSection);
// ========== SWITCH SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Switch"));
var switchSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 20 };
var sw1 = new SkiaSwitch { IsOn = true };
switchSection.AddChild(sw1);
switchSection.AddChild(new SkiaLabel { Text = "On", FontSize = 14 });
var sw2 = new SkiaSwitch { IsOn = false };
switchSection.AddChild(sw2);
switchSection.AddChild(new SkiaLabel { Text = "Off", FontSize = 14 });
root.AddChild(switchSection);
// ========== RADIOBUTTON SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("RadioButton"));
var radioSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 15 };
radioSection.AddChild(new SkiaRadioButton { Content = "Option A", IsChecked = true, GroupName = "demo" });
radioSection.AddChild(new SkiaRadioButton { Content = "Option B", IsChecked = false, GroupName = "demo" });
radioSection.AddChild(new SkiaRadioButton { Content = "Option C", IsChecked = false, GroupName = "demo" });
root.AddChild(radioSection);
// ========== SLIDER SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Slider"));
var sliderLabel = new SkiaLabel { Text = "Value: 50", FontSize = 14 };
var slider = new SkiaSlider { Minimum = 0, Maximum = 100, Value = 50 };
slider.ValueChanged += (s, e) => sliderLabel.Text = $"Value: {(int)slider.Value}";
root.AddChild(slider);
root.AddChild(sliderLabel);
// ========== STEPPER SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Stepper"));
var stepperSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 10 };
var stepperLabel = new SkiaLabel { Text = "Value: 5", FontSize = 14 };
var stepper = new SkiaStepper { Value = 5, Minimum = 0, Maximum = 10, Increment = 1 };
stepper.ValueChanged += (s, e) => stepperLabel.Text = $"Value: {(int)stepper.Value}";
stepperSection.AddChild(stepper);
stepperSection.AddChild(stepperLabel);
root.AddChild(stepperSection);
// ========== PROGRESSBAR SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("ProgressBar"));
var progress = new SkiaProgressBar { Progress = 0.7f };
root.AddChild(progress);
root.AddChild(new SkiaLabel { Text = "70% Complete", FontSize = 12, TextColor = SKColors.Gray });
// ========== ACTIVITYINDICATOR SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("ActivityIndicator"));
var activitySection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 10 };
var activity = new SkiaActivityIndicator { IsRunning = true };
activitySection.AddChild(activity);
activitySection.AddChild(new SkiaLabel { Text = "Loading...", FontSize = 14, TextColor = SKColors.Gray });
root.AddChild(activitySection);
// ========== PICKER SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Picker (Dropdown)"));
var picker = new SkiaPicker { Title = "Select an item" };
picker.SetItems(new[] { "Apple", "Banana", "Cherry", "Date", "Elderberry", "Fig", "Grape" });
var pickerLabel = new SkiaLabel { Text = "Selected: (none)", FontSize = 12, TextColor = SKColors.Gray };
picker.SelectedIndexChanged += (s, e) => pickerLabel.Text = $"Selected: {picker.SelectedItem}";
root.AddChild(picker);
root.AddChild(pickerLabel);
// ========== DATEPICKER SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("DatePicker"));
var datePicker = new SkiaDatePicker { Date = DateTime.Today };
var dateLabel = new SkiaLabel { Text = $"Date: {DateTime.Today:d}", FontSize = 12, TextColor = SKColors.Gray };
datePicker.DateSelected += (s, e) => dateLabel.Text = $"Date: {datePicker.Date:d}";
root.AddChild(datePicker);
root.AddChild(dateLabel);
// ========== TIMEPICKER SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("TimePicker"));
var timePicker = new SkiaTimePicker();
var timeLabel = new SkiaLabel { Text = $"Time: {DateTime.Now:t}", FontSize = 12, TextColor = SKColors.Gray };
timePicker.TimeSelected += (s, e) => timeLabel.Text = $"Time: {DateTime.Today.Add(timePicker.Time):t}";
root.AddChild(timePicker);
root.AddChild(timeLabel);
// ========== BORDER SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Border"));
var border = new SkiaBorder
{
CornerRadius = 8,
StrokeThickness = 2,
Stroke = new SKColor(0x21, 0x96, 0xF3),
BackgroundColor = new SKColor(0xE3, 0xF2, 0xFD)
};
border.SetPadding(15);
border.AddChild(new SkiaLabel { Text = "Content inside a styled Border", FontSize = 14, TextColor = new SKColor(0x1A, 0x23, 0x7E) });
root.AddChild(border);
// ========== FRAME SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Frame (with shadow)"));
var frame = new SkiaFrame();
frame.BackgroundColor = SKColors.White;
frame.AddChild(new SkiaLabel { Text = "Content inside a Frame with shadow effect", FontSize = 14 });
root.AddChild(frame);
// ========== COLLECTIONVIEW SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("CollectionView (List)"));
var collectionView = new SkiaCollectionView
{
SelectionMode = SkiaSelectionMode.Single,
Header = "Fruits",
Footer = "End of list"
};
collectionView.ItemsSource =(new object[] { "Apple", "Banana", "Cherry", "Date", "Elderberry", "Fig", "Grape", "Honeydew" });
var collectionLabel = new SkiaLabel { Text = "Selected: (none)", FontSize = 12, TextColor = SKColors.Gray };
collectionView.SelectionChanged += (s, e) =>
{
var selected = e.CurrentSelection.FirstOrDefault();
collectionLabel.Text = $"Selected: {selected}";
};
root.AddChild(collectionView);
root.AddChild(collectionLabel);
// ========== IMAGEBUTTON SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("ImageButton"));
var imageButtonSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 10 };
// Create ImageButton with a generated icon (since we don't have image files)
var imgBtn = new SkiaImageButton
{
CornerRadius = 8,
StrokeColor = new SKColor(0x21, 0x96, 0xF3),
StrokeThickness = 1,
BackgroundColor = new SKColor(0xE3, 0xF2, 0xFD),
PaddingLeft = 10,
PaddingRight = 10,
PaddingTop = 10,
PaddingBottom = 10
};
// Generate a simple star icon bitmap
var iconBitmap = CreateStarIcon(32, new SKColor(0x21, 0x96, 0xF3));
imgBtn.Bitmap = iconBitmap;
var imgBtnLabel = new SkiaLabel { Text = "Click the star!", FontSize = 12, TextColor = SKColors.Gray };
imgBtn.Clicked += (s, e) => imgBtnLabel.Text = "Star clicked!";
imageButtonSection.AddChild(imgBtn);
imageButtonSection.AddChild(imgBtnLabel);
root.AddChild(imageButtonSection);
// ========== IMAGE SECTION ==========
root.AddChild(CreateSeparator());
root.AddChild(CreateSectionHeader("Image"));
var imageSection = new SkiaStackLayout { Orientation = StackOrientation.Horizontal, Spacing = 10 };
// Create Image with a generated sample image
var img = new SkiaImage();
var sampleBitmap = CreateSampleImage(80, 60);
img.Bitmap = sampleBitmap;
imageSection.AddChild(img);
imageSection.AddChild(new SkiaLabel { Text = "Sample generated image", FontSize = 12, TextColor = SKColors.Gray });
root.AddChild(imageSection);
// ========== FOOTER ==========
root.AddChild(CreateSeparator());
root.AddChild(new SkiaLabel
{
Text = "All 25+ controls are interactive - try them all!",
FontSize = 16,
TextColor = new SKColor(0x4C, 0xAF, 0x50),
IsBold = true
});
root.AddChild(new SkiaLabel
{
Text = "Scroll down to see more controls",
FontSize = 12,
TextColor = SKColors.Gray
});
scroll.Content = root;
return scroll;
}
private static SkiaLabel CreateSectionHeader(string text)
{
return new SkiaLabel
{
Text = text,
FontSize = 18,
TextColor = new SKColor(0x37, 0x47, 0x4F),
IsBold = true
};
}
private static SkiaView CreateSeparator()
{
var sep = new SkiaLabel { Text = "", BackgroundColor = new SKColor(0xE0, 0xE0, 0xE0), RequestedHeight = 1 };
return sep;
}
private static SKBitmap CreateStarIcon(int size, SKColor color)
{
var bitmap = new SKBitmap(size, size);
using var canvas = new SKCanvas(bitmap);
canvas.Clear(SKColors.Transparent);
using var paint = new SKPaint
{
Color = color,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
// Draw a 5-point star
using var path = new SKPath();
var cx = size / 2f;
var cy = size / 2f;
var outerRadius = size / 2f - 2;
var innerRadius = outerRadius * 0.4f;
for (int i = 0; i < 5; i++)
{
var outerAngle = (i * 72 - 90) * Math.PI / 180;
var innerAngle = ((i * 72) + 36 - 90) * Math.PI / 180;
var ox = cx + outerRadius * (float)Math.Cos(outerAngle);
var oy = cy + outerRadius * (float)Math.Sin(outerAngle);
var ix = cx + innerRadius * (float)Math.Cos(innerAngle);
var iy = cy + innerRadius * (float)Math.Sin(innerAngle);
if (i == 0)
path.MoveTo(ox, oy);
else
path.LineTo(ox, oy);
path.LineTo(ix, iy);
}
path.Close();
canvas.DrawPath(path, paint);
return bitmap;
}
private static SKBitmap CreateSampleImage(int width, int height)
{
var bitmap = new SKBitmap(width, height);
using var canvas = new SKCanvas(bitmap);
// Draw gradient background
using var bgPaint = new SKPaint();
using var shader = SKShader.CreateLinearGradient(
new SKPoint(0, 0),
new SKPoint(width, height),
new SKColor[] { new SKColor(0x42, 0xA5, 0xF5), new SKColor(0x7E, 0x57, 0xC2) },
new float[] { 0, 1 },
SKShaderTileMode.Clamp);
bgPaint.Shader = shader;
canvas.DrawRect(0, 0, width, height, bgPaint);
// Draw some shapes
using var shapePaint = new SKPaint
{
Color = SKColors.White.WithAlpha(180),
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawCircle(width * 0.3f, height * 0.4f, 15, shapePaint);
canvas.DrawRect(width * 0.5f, height * 0.3f, 20, 20, shapePaint);
// Draw "IMG" text
using var font = new SKFont(SKTypeface.Default, 12);
using var textPaint = new SKPaint(font)
{
Color = SKColors.White,
IsAntialias = true
};
canvas.DrawText("IMG", 10, height - 8, textPaint);
return bitmap;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace Microsoft.Maui.Platform;
/// <summary>
/// Keyboard key enumeration.
/// </summary>
public enum Key
{
Unknown = 0,
// Letters
A, B, C, D, E, F, G, H, I, J, K, L, M,
N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
// Numbers
D0, D1, D2, D3, D4, D5, D6, D7, D8, D9,
// Numpad
NumPad0, NumPad1, NumPad2, NumPad3, NumPad4,
NumPad5, NumPad6, NumPad7, NumPad8, NumPad9,
NumPadMultiply, NumPadAdd, NumPadSubtract,
NumPadDecimal, NumPadDivide, NumPadEnter,
// Function keys
F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12,
// Navigation
Left, Up, Right, Down,
Home, End, PageUp, PageDown,
Insert, Delete,
// Modifiers
Shift, Control, Alt, Super,
CapsLock, NumLock, ScrollLock,
// Editing
Backspace, Tab, Enter, Escape, Space,
// Punctuation
Comma, Period, Slash, Semicolon, Quote,
LeftBracket, RightBracket, Backslash,
Minus, Equals, Grave,
// System
PrintScreen, Pause, Menu,
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Platform.Linux.Interop;
namespace Microsoft.Maui.Platform.Linux.Input;
/// <summary>
/// Maps X11 keycodes/keysyms to MAUI Key enum.
/// </summary>
public static class KeyMapping
{
// X11 keysym values
private const int XK_BackSpace = 0xff08;
private const int XK_Tab = 0xff09;
private const int XK_Return = 0xff0d;
private const int XK_Escape = 0xff1b;
private const int XK_Delete = 0xffff;
private const int XK_Home = 0xff50;
private const int XK_Left = 0xff51;
private const int XK_Up = 0xff52;
private const int XK_Right = 0xff53;
private const int XK_Down = 0xff54;
private const int XK_Page_Up = 0xff55;
private const int XK_Page_Down = 0xff56;
private const int XK_End = 0xff57;
private const int XK_Insert = 0xff63;
private const int XK_F1 = 0xffbe;
private const int XK_Shift_L = 0xffe1;
private const int XK_Shift_R = 0xffe2;
private const int XK_Control_L = 0xffe3;
private const int XK_Control_R = 0xffe4;
private const int XK_Alt_L = 0xffe9;
private const int XK_Alt_R = 0xffea;
private const int XK_Super_L = 0xffeb;
private const int XK_Super_R = 0xffec;
private const int XK_Caps_Lock = 0xffe5;
private const int XK_Num_Lock = 0xff7f;
private const int XK_Scroll_Lock = 0xff14;
private static readonly Dictionary<int, Key> KeysymToKey = new()
{
// Special keys
[XK_BackSpace] = Key.Backspace,
[XK_Tab] = Key.Tab,
[XK_Return] = Key.Enter,
[XK_Escape] = Key.Escape,
[XK_Delete] = Key.Delete,
[XK_Home] = Key.Home,
[XK_End] = Key.End,
[XK_Insert] = Key.Insert,
[XK_Page_Up] = Key.PageUp,
[XK_Page_Down] = Key.PageDown,
// Arrow keys
[XK_Left] = Key.Left,
[XK_Up] = Key.Up,
[XK_Right] = Key.Right,
[XK_Down] = Key.Down,
// Modifiers
[XK_Shift_L] = Key.Shift,
[XK_Shift_R] = Key.Shift,
[XK_Control_L] = Key.Control,
[XK_Control_R] = Key.Control,
[XK_Alt_L] = Key.Alt,
[XK_Alt_R] = Key.Alt,
[XK_Super_L] = Key.Super,
[XK_Super_R] = Key.Super,
[XK_Caps_Lock] = Key.CapsLock,
[XK_Num_Lock] = Key.NumLock,
[XK_Scroll_Lock] = Key.ScrollLock,
// Function keys
[XK_F1] = Key.F1,
[XK_F1 + 1] = Key.F2,
[XK_F1 + 2] = Key.F3,
[XK_F1 + 3] = Key.F4,
[XK_F1 + 4] = Key.F5,
[XK_F1 + 5] = Key.F6,
[XK_F1 + 6] = Key.F7,
[XK_F1 + 7] = Key.F8,
[XK_F1 + 8] = Key.F9,
[XK_F1 + 9] = Key.F10,
[XK_F1 + 10] = Key.F11,
[XK_F1 + 11] = Key.F12,
// Space
[0x20] = Key.Space,
// Punctuation
[','] = Key.Comma,
['.'] = Key.Period,
['/'] = Key.Slash,
[';'] = Key.Semicolon,
['\''] = Key.Quote,
['['] = Key.LeftBracket,
[']'] = Key.RightBracket,
['\\'] = Key.Backslash,
['-'] = Key.Minus,
['='] = Key.Equals,
['`'] = Key.Grave,
};
/// <summary>
/// Converts an X11 keysym to a MAUI Key.
/// </summary>
public static Key FromKeysym(ulong keysym)
{
// Check direct mapping
if (KeysymToKey.TryGetValue((int)keysym, out var key))
return key;
// Letters (a-z, A-Z)
if (keysym >= 'a' && keysym <= 'z')
return Key.A + (int)(keysym - 'a');
if (keysym >= 'A' && keysym <= 'Z')
return Key.A + (int)(keysym - 'A');
// Numbers (0-9)
if (keysym >= '0' && keysym <= '9')
return Key.D0 + (int)(keysym - '0');
// Numpad numbers (0xff[b0-b9])
if (keysym >= 0xffb0 && keysym <= 0xffb9)
return Key.NumPad0 + (int)(keysym - 0xffb0);
return Key.Unknown;
}
/// <summary>
/// Gets the keysym from X11 keycode.
/// </summary>
public static ulong GetKeysym(IntPtr display, uint keycode, bool shifted)
{
var index = shifted ? 1 : 0;
return X11.XKeycodeToKeysym(display, (int)keycode, index);
}
/// <summary>
/// Converts X11 modifier state to KeyModifiers.
/// </summary>
public static KeyModifiers GetModifiers(uint state)
{
var modifiers = KeyModifiers.None;
if ((state & 0x01) != 0) modifiers |= KeyModifiers.Shift;
if ((state & 0x04) != 0) modifiers |= KeyModifiers.Control;
if ((state & 0x08) != 0) modifiers |= KeyModifiers.Alt;
if ((state & 0x40) != 0) modifiers |= KeyModifiers.Super;
if ((state & 0x02) != 0) modifiers |= KeyModifiers.CapsLock;
if ((state & 0x10) != 0) modifiers |= KeyModifiers.NumLock;
return modifiers;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
namespace Microsoft.Maui.Platform.Linux.Interop;
/// <summary>
/// P/Invoke declarations for X11 library functions.
/// </summary>
internal static partial class X11
{
private const string LibX11 = "libX11.so.6";
private const string LibXext = "libXext.so.6";
#region Display and Screen
[LibraryImport(LibX11)]
public static partial IntPtr XOpenDisplay(IntPtr displayName);
[LibraryImport(LibX11)]
public static partial int XCloseDisplay(IntPtr display);
[LibraryImport(LibX11)]
public static partial int XDefaultScreen(IntPtr display);
[LibraryImport(LibX11)]
public static partial IntPtr XRootWindow(IntPtr display, int screenNumber);
[LibraryImport(LibX11)]
public static partial int XDisplayWidth(IntPtr display, int screenNumber);
[LibraryImport(LibX11)]
public static partial int XDisplayHeight(IntPtr display, int screenNumber);
[LibraryImport(LibX11)]
public static partial int XDefaultDepth(IntPtr display, int screenNumber);
[LibraryImport(LibX11)]
public static partial IntPtr XDefaultVisual(IntPtr display, int screenNumber);
[LibraryImport(LibX11)]
public static partial IntPtr XDefaultColormap(IntPtr display, int screenNumber);
[LibraryImport(LibX11)]
public static partial int XFlush(IntPtr display);
[LibraryImport(LibX11)]
public static partial int XSync(IntPtr display, [MarshalAs(UnmanagedType.Bool)] bool discard);
#endregion
#region Window Creation and Management
[LibraryImport(LibX11)]
public static partial IntPtr XCreateSimpleWindow(
IntPtr display,
IntPtr parent,
int x, int y,
uint width, uint height,
uint borderWidth,
ulong border,
ulong background);
[LibraryImport(LibX11)]
public static partial IntPtr XCreateWindow(
IntPtr display,
IntPtr parent,
int x, int y,
uint width, uint height,
uint borderWidth,
int depth,
uint windowClass,
IntPtr visual,
ulong valueMask,
ref XSetWindowAttributes attributes);
[LibraryImport(LibX11)]
public static partial int XDestroyWindow(IntPtr display, IntPtr window);
[LibraryImport(LibX11)]
public static partial int XMapWindow(IntPtr display, IntPtr window);
[LibraryImport(LibX11)]
public static partial int XUnmapWindow(IntPtr display, IntPtr window);
[LibraryImport(LibX11)]
public static partial int XMoveWindow(IntPtr display, IntPtr window, int x, int y);
[LibraryImport(LibX11)]
public static partial int XResizeWindow(IntPtr display, IntPtr window, uint width, uint height);
[LibraryImport(LibX11)]
public static partial int XMoveResizeWindow(IntPtr display, IntPtr window, int x, int y, uint width, uint height);
[LibraryImport(LibX11, StringMarshalling = StringMarshalling.Utf8)]
public static partial int XStoreName(IntPtr display, IntPtr window, string windowName);
[LibraryImport(LibX11)]
public static partial int XRaiseWindow(IntPtr display, IntPtr window);
[LibraryImport(LibX11)]
public static partial int XLowerWindow(IntPtr display, IntPtr window);
#endregion
#region Event Handling
[LibraryImport(LibX11)]
public static partial int XSelectInput(IntPtr display, IntPtr window, long eventMask);
[LibraryImport(LibX11)]
public static partial int XNextEvent(IntPtr display, out XEvent eventReturn);
[LibraryImport(LibX11)]
public static partial int XPeekEvent(IntPtr display, out XEvent eventReturn);
[LibraryImport(LibX11)]
public static partial int XPending(IntPtr display);
[LibraryImport(LibX11)]
[return: MarshalAs(UnmanagedType.Bool)]
public static partial bool XCheckTypedWindowEvent(IntPtr display, IntPtr window, int eventType, out XEvent eventReturn);
[LibraryImport(LibX11)]
public static partial int XSendEvent(IntPtr display, IntPtr window, [MarshalAs(UnmanagedType.Bool)] bool propagate, long eventMask, ref XEvent eventSend);
#endregion
#region Keyboard
[LibraryImport(LibX11)]
public static partial ulong XKeycodeToKeysym(IntPtr display, int keycode, int index);
[LibraryImport(LibX11)]
public static partial int XLookupString(ref XKeyEvent keyEvent, IntPtr bufferReturn, int bytesBuffer, out ulong keysymReturn, IntPtr statusInOut);
[LibraryImport(LibX11)]
public static partial int XGrabKeyboard(IntPtr display, IntPtr grabWindow, [MarshalAs(UnmanagedType.Bool)] bool ownerEvents, int pointerMode, int keyboardMode, ulong time);
[LibraryImport(LibX11)]
public static partial int XUngrabKeyboard(IntPtr display, ulong time);
#endregion
#region Mouse/Pointer
[LibraryImport(LibX11)]
public static partial int XGrabPointer(IntPtr display, IntPtr grabWindow, [MarshalAs(UnmanagedType.Bool)] bool ownerEvents, uint eventMask, int pointerMode, int keyboardMode, IntPtr confineTo, IntPtr cursor, ulong time);
[LibraryImport(LibX11)]
public static partial int XUngrabPointer(IntPtr display, ulong time);
[LibraryImport(LibX11)]
[return: MarshalAs(UnmanagedType.Bool)]
public static partial bool XQueryPointer(IntPtr display, IntPtr window, out IntPtr rootReturn, out IntPtr childReturn, out int rootX, out int rootY, out int winX, out int winY, out uint maskReturn);
[LibraryImport(LibX11)]
public static partial int XWarpPointer(IntPtr display, IntPtr srcWindow, IntPtr destWindow, int srcX, int srcY, uint srcWidth, uint srcHeight, int destX, int destY);
#endregion
#region Atoms and Properties
[LibraryImport(LibX11, StringMarshalling = StringMarshalling.Utf8)]
public static partial IntPtr XInternAtom(IntPtr display, string atomName, [MarshalAs(UnmanagedType.Bool)] bool onlyIfExists);
[LibraryImport(LibX11)]
public static partial int XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, int mode, IntPtr data, int nelements);
[LibraryImport(LibX11)]
public static partial int XGetWindowProperty(IntPtr display, IntPtr window, IntPtr property, long longOffset, long longLength, [MarshalAs(UnmanagedType.Bool)] bool delete, IntPtr reqType, out IntPtr actualTypeReturn, out int actualFormatReturn, out IntPtr nitemsReturn, out IntPtr bytesAfterReturn, out IntPtr propReturn);
[LibraryImport(LibX11)]
public static partial int XDeleteProperty(IntPtr display, IntPtr window, IntPtr property);
#endregion
#region Clipboard/Selection
[LibraryImport(LibX11)]
public static partial int XSetSelectionOwner(IntPtr display, IntPtr selection, IntPtr owner, ulong time);
[LibraryImport(LibX11)]
public static partial IntPtr XGetSelectionOwner(IntPtr display, IntPtr selection);
[LibraryImport(LibX11)]
public static partial int XConvertSelection(IntPtr display, IntPtr selection, IntPtr target, IntPtr property, IntPtr requestor, ulong time);
#endregion
#region Memory
[LibraryImport(LibX11)]
public static partial int XFree(IntPtr data);
#endregion
#region Graphics Context
[LibraryImport(LibX11)]
public static partial IntPtr XCreateGC(IntPtr display, IntPtr drawable, ulong valueMask, IntPtr values);
[LibraryImport(LibX11)]
public static partial int XFreeGC(IntPtr display, IntPtr gc);
[LibraryImport(LibX11)]
public static partial int XCopyArea(IntPtr display, IntPtr src, IntPtr dest, IntPtr gc, int srcX, int srcY, uint width, uint height, int destX, int destY);
#endregion
#region Cursor
[LibraryImport(LibX11)]
public static partial IntPtr XCreateFontCursor(IntPtr display, uint shape);
[LibraryImport(LibX11)]
public static partial int XFreeCursor(IntPtr display, IntPtr cursor);
[LibraryImport(LibX11)]
public static partial int XDefineCursor(IntPtr display, IntPtr window, IntPtr cursor);
[LibraryImport(LibX11)]
public static partial int XUndefineCursor(IntPtr display, IntPtr window);
#endregion
#region Connection
[LibraryImport(LibX11)]
public static partial int XConnectionNumber(IntPtr display);
#endregion
#region Image Functions
[LibraryImport(LibX11)]
public static partial IntPtr XCreateImage(IntPtr display, IntPtr visual, uint depth, int format,
int offset, IntPtr data, uint width, uint height, int bitmapPad, int bytesPerLine);
[LibraryImport(LibX11)]
public static partial int XPutImage(IntPtr display, IntPtr drawable, IntPtr gc, IntPtr image,
int srcX, int srcY, int destX, int destY, uint width, uint height);
[LibraryImport(LibX11)]
public static partial int XDestroyImage(IntPtr image);
[LibraryImport(LibX11)]
public static partial IntPtr XDefaultGC(IntPtr display, int screen);
public const int ZPixmap = 2;
#endregion
}
#region X11 Structures
[StructLayout(LayoutKind.Sequential)]
public struct XSetWindowAttributes
{
public IntPtr BackgroundPixmap;
public ulong BackgroundPixel;
public IntPtr BorderPixmap;
public ulong BorderPixel;
public int BitGravity;
public int WinGravity;
public int BackingStore;
public ulong BackingPlanes;
public ulong BackingPixel;
public int SaveUnder;
public long EventMask;
public long DoNotPropagateMask;
public int OverrideRedirect;
public IntPtr Colormap;
public IntPtr Cursor;
}
[StructLayout(LayoutKind.Explicit, Size = 192)]
public struct XEvent
{
[FieldOffset(0)] public int Type;
[FieldOffset(0)] public XKeyEvent KeyEvent;
[FieldOffset(0)] public XButtonEvent ButtonEvent;
[FieldOffset(0)] public XMotionEvent MotionEvent;
[FieldOffset(0)] public XConfigureEvent ConfigureEvent;
[FieldOffset(0)] public XExposeEvent ExposeEvent;
[FieldOffset(0)] public XClientMessageEvent ClientMessageEvent;
[FieldOffset(0)] public XCrossingEvent CrossingEvent;
[FieldOffset(0)] public XFocusChangeEvent FocusChangeEvent;
}
[StructLayout(LayoutKind.Sequential)]
public struct XKeyEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public IntPtr Root;
public IntPtr Subwindow;
public ulong Time;
public int X, Y;
public int XRoot, YRoot;
public uint State;
public uint Keycode;
public int SameScreen;
}
[StructLayout(LayoutKind.Sequential)]
public struct XButtonEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public IntPtr Root;
public IntPtr Subwindow;
public ulong Time;
public int X, Y;
public int XRoot, YRoot;
public uint State;
public uint Button;
public int SameScreen;
}
[StructLayout(LayoutKind.Sequential)]
public struct XMotionEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public IntPtr Root;
public IntPtr Subwindow;
public ulong Time;
public int X, Y;
public int XRoot, YRoot;
public uint State;
public byte IsHint;
public int SameScreen;
}
[StructLayout(LayoutKind.Sequential)]
public struct XConfigureEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Event;
public IntPtr Window;
public int X, Y;
public int Width, Height;
public int BorderWidth;
public IntPtr Above;
public int OverrideRedirect;
}
[StructLayout(LayoutKind.Sequential)]
public struct XExposeEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public int X, Y;
public int Width, Height;
public int Count;
}
[StructLayout(LayoutKind.Sequential)]
public struct XClientMessageEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public IntPtr MessageType;
public int Format;
public ClientMessageData Data;
}
[StructLayout(LayoutKind.Explicit)]
public struct ClientMessageData
{
[FieldOffset(0)] public long L0;
[FieldOffset(8)] public long L1;
[FieldOffset(16)] public long L2;
[FieldOffset(24)] public long L3;
[FieldOffset(32)] public long L4;
}
[StructLayout(LayoutKind.Sequential)]
public struct XCrossingEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public IntPtr Root;
public IntPtr Subwindow;
public ulong Time;
public int X, Y;
public int XRoot, YRoot;
public int Mode;
public int Detail;
public int SameScreen;
public int Focus;
public uint State;
}
[StructLayout(LayoutKind.Sequential)]
public struct XFocusChangeEvent
{
public int Type;
public ulong Serial;
public int SendEvent;
public IntPtr Display;
public IntPtr Window;
public int Mode;
public int Detail;
}
#endregion
#region X11 Constants
public static class XEventType
{
public const int KeyPress = 2;
public const int KeyRelease = 3;
public const int ButtonPress = 4;
public const int ButtonRelease = 5;
public const int MotionNotify = 6;
public const int EnterNotify = 7;
public const int LeaveNotify = 8;
public const int FocusIn = 9;
public const int FocusOut = 10;
public const int Expose = 12;
public const int ConfigureNotify = 22;
public const int ClientMessage = 33;
}
public static class XEventMask
{
public const long KeyPressMask = 1L << 0;
public const long KeyReleaseMask = 1L << 1;
public const long ButtonPressMask = 1L << 2;
public const long ButtonReleaseMask = 1L << 3;
public const long EnterWindowMask = 1L << 4;
public const long LeaveWindowMask = 1L << 5;
public const long PointerMotionMask = 1L << 6;
public const long ExposureMask = 1L << 15;
public const long StructureNotifyMask = 1L << 17;
public const long FocusChangeMask = 1L << 21;
}
public static class XWindowClass
{
public const uint InputOutput = 1;
public const uint InputOnly = 2;
}
public static class XCursorShape
{
public const uint XC_left_ptr = 68;
public const uint XC_hand2 = 60;
public const uint XC_xterm = 152;
public const uint XC_watch = 150;
public const uint XC_crosshair = 34;
}
#endregion

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Platform.Linux.Rendering;
using Microsoft.Maui.Platform.Linux.Window;
using Microsoft.Maui.Platform.Linux.Services;
using Microsoft.Maui.Platform;
namespace Microsoft.Maui.Platform.Linux;
/// <summary>
/// Main Linux application class that bootstraps the MAUI application.
/// </summary>
public class LinuxApplication : IDisposable
{
private X11Window? _mainWindow;
private SkiaRenderingEngine? _renderingEngine;
private SkiaView? _rootView;
private SkiaView? _focusedView;
private SkiaView? _hoveredView;
private bool _disposed;
/// <summary>
/// Gets the current application instance.
/// </summary>
public static LinuxApplication? Current { get; private set; }
/// <summary>
/// Gets the main window.
/// </summary>
public X11Window? MainWindow => _mainWindow;
/// <summary>
/// Gets the rendering engine.
/// </summary>
public SkiaRenderingEngine? RenderingEngine => _renderingEngine;
/// <summary>
/// Gets or sets the root view.
/// </summary>
public SkiaView? RootView
{
get => _rootView;
set
{
_rootView = value;
if (_rootView != null && _mainWindow != null)
{
_rootView.Arrange(new SkiaSharp.SKRect(
0, 0,
_mainWindow.Width,
_mainWindow.Height));
}
}
}
/// <summary>
/// Gets or sets the currently focused view.
/// </summary>
public SkiaView? FocusedView
{
get => _focusedView;
set
{
if (_focusedView != value)
{
if (_focusedView != null)
{
_focusedView.IsFocused = false;
}
_focusedView = value;
if (_focusedView != null)
{
_focusedView.IsFocused = true;
}
}
}
}
/// <summary>
/// Creates a new Linux application.
/// </summary>
public LinuxApplication()
{
Current = this;
}
/// <summary>
/// Initializes the application with the specified options.
/// </summary>
public void Initialize(LinuxApplicationOptions options)
{
// Create the main window
_mainWindow = new X11Window(
options.Title ?? "MAUI Application",
options.Width,
options.Height);
// Create the rendering engine
_renderingEngine = new SkiaRenderingEngine(_mainWindow);
// Wire up events
_mainWindow.Resized += OnWindowResized;
_mainWindow.Exposed += OnWindowExposed;
_mainWindow.KeyDown += OnKeyDown;
_mainWindow.KeyUp += OnKeyUp;
_mainWindow.TextInput += OnTextInput;
_mainWindow.PointerMoved += OnPointerMoved;
_mainWindow.PointerPressed += OnPointerPressed;
_mainWindow.PointerReleased += OnPointerReleased;
_mainWindow.Scroll += OnScroll;
_mainWindow.CloseRequested += OnCloseRequested;
// Register platform services
RegisterServices();
}
private void RegisterServices()
{
// Platform services would be registered with the DI container here
// For now, we create singleton instances
}
/// <summary>
/// Shows the main window and runs the event loop.
/// </summary>
public void Run()
{
if (_mainWindow == null)
throw new InvalidOperationException("Application not initialized");
_mainWindow.Show();
// Initial render
Render();
// Run the event loop
while (_mainWindow.IsRunning)
{
_mainWindow.ProcessEvents();
// Update animations and render
UpdateAnimations();
Render();
// Small delay to prevent 100% CPU usage
Thread.Sleep(1);
}
}
private void UpdateAnimations()
{
// Update cursor blink for entry controls
if (_focusedView is SkiaEntry entry)
{
entry.UpdateCursorBlink();
}
}
private void Render()
{
if (_renderingEngine != null && _rootView != null)
{
_renderingEngine.Render(_rootView);
}
}
private void OnWindowResized(object? sender, (int Width, int Height) size)
{
if (_rootView != null)
{
_rootView.Arrange(new SkiaSharp.SKRect(0, 0, size.Width, size.Height));
}
_renderingEngine?.InvalidateAll();
}
private void OnWindowExposed(object? sender, EventArgs e)
{
Render();
}
private void OnKeyDown(object? sender, KeyEventArgs e)
{
if (_focusedView != null)
{
_focusedView.OnKeyDown(e);
}
}
private void OnKeyUp(object? sender, KeyEventArgs e)
{
if (_focusedView != null)
{
_focusedView.OnKeyUp(e);
}
}
private void OnTextInput(object? sender, TextInputEventArgs e)
{
if (_focusedView != null)
{
_focusedView.OnTextInput(e);
}
}
private void OnPointerMoved(object? sender, PointerEventArgs e)
{
if (_rootView != null)
{
var hitView = _rootView.HitTest(e.X, e.Y);
// Track hover state changes
if (hitView != _hoveredView)
{
_hoveredView?.OnPointerExited(e);
_hoveredView = hitView;
_hoveredView?.OnPointerEntered(e);
}
hitView?.OnPointerMoved(e);
}
}
private void OnPointerPressed(object? sender, PointerEventArgs e)
{
if (_rootView != null)
{
var hitView = _rootView.HitTest(e.X, e.Y);
if (hitView != null)
{
// Update focus
if (hitView.IsFocusable)
{
FocusedView = hitView;
}
hitView.OnPointerPressed(e);
}
else
{
FocusedView = null;
}
}
}
private void OnPointerReleased(object? sender, PointerEventArgs e)
{
if (_rootView != null)
{
var hitView = _rootView.HitTest(e.X, e.Y);
hitView?.OnPointerReleased(e);
}
}
private void OnScroll(object? sender, ScrollEventArgs e)
{
if (_rootView != null)
{
var hitView = _rootView.HitTest(e.X, e.Y);
// Bubble scroll events up to find a ScrollView
var view = hitView;
while (view != null)
{
if (view is SkiaScrollView scrollView)
{
scrollView.OnScroll(e);
return;
}
view.OnScroll(e);
if (e.Handled) return;
view = view.Parent;
}
}
}
private void OnCloseRequested(object? sender, EventArgs e)
{
_mainWindow?.Stop();
}
public void Dispose()
{
if (!_disposed)
{
_renderingEngine?.Dispose();
_mainWindow?.Dispose();
if (Current == this)
Current = null;
_disposed = true;
}
}
}
/// <summary>
/// Options for Linux application initialization.
/// </summary>
public class LinuxApplicationOptions
{
/// <summary>
/// Gets or sets the window title.
/// </summary>
public string? Title { get; set; } = "MAUI Application";
/// <summary>
/// Gets or sets the initial window width.
/// </summary>
public int Width { get; set; } = 800;
/// <summary>
/// Gets or sets the initial window height.
/// </summary>
public int Height { get; set; } = 600;
/// <summary>
/// Gets or sets whether to use hardware acceleration.
/// </summary>
public bool UseHardwareAcceleration { get; set; } = true;
/// <summary>
/// Gets or sets the display server type.
/// </summary>
public DisplayServerType DisplayServer { get; set; } = DisplayServerType.Auto;
}
/// <summary>
/// Display server type options.
/// </summary>
public enum DisplayServerType
{
/// <summary>
/// Automatically detect the display server.
/// </summary>
Auto,
/// <summary>
/// Use X11 (Xorg).
/// </summary>
X11,
/// <summary>
/// Use Wayland.
/// </summary>
Wayland
}

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net9.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<RootNamespace>Microsoft.Maui.Platform.Linux</RootNamespace>
<AssemblyName>Microsoft.Maui.Controls.Linux</AssemblyName>
<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
<GenerateDocumentationFile>true</GenerateDocumentationFile>
<NoWarn>$(NoWarn);CS0108;CS1591;CS0618</NoWarn>
<!-- NuGet Package Properties -->
<PackageId>Microsoft.Maui.Controls.Linux</PackageId>
<Version>1.0.0-preview.4</Version>
<Authors>MAUI Linux Community Contributors</Authors>
<Company>.NET Foundation</Company>
<Product>.NET MAUI Linux Controls</Product>
<Description>Linux desktop support for .NET MAUI applications using SkiaSharp rendering. Supports X11 and Wayland display servers.</Description>
<Copyright>Copyright 2024-2025 .NET Foundation and Contributors</Copyright>
<PackageLicenseExpression>MIT</PackageLicenseExpression>
<PackageProjectUrl>https://github.com/dotnet/maui</PackageProjectUrl>
<RepositoryUrl>https://github.com/dotnet/maui.git</RepositoryUrl>
<RepositoryType>git</RepositoryType>
<PackageTags>maui;linux;desktop;skia;gui;cross-platform;dotnet;x11;wayland</PackageTags>
<PackageReleaseNotes>Preview 2 with Image, ImageButton, and GraphicsView controls.</PackageReleaseNotes>
<PackageReadmeFile>README.md</PackageReadmeFile>
<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
<IsPackable>true</IsPackable>
</PropertyGroup>
<ItemGroup>
<!-- MAUI Core packages -->
<PackageReference Include="Microsoft.Maui.Controls" Version="9.0.40" />
<PackageReference Include="Microsoft.Maui.Graphics" Version="9.0.40" />
<PackageReference Include="Microsoft.Maui.Graphics.Skia" Version="9.0.40" />
<!-- SkiaSharp for rendering -->
<PackageReference Include="SkiaSharp" Version="3.116.1" />
<PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="3.116.1" />
<PackageReference Include="SkiaSharp.Views.Desktop.Common" Version="3.116.1" />
<!-- HarfBuzz for advanced text shaping -->
<PackageReference Include="HarfBuzzSharp" Version="7.3.0.3" />
<PackageReference Include="HarfBuzzSharp.NativeAssets.Linux" Version="7.3.0.3" />
</ItemGroup>
<!-- Include README in package -->
<ItemGroup>
<None Include="README.md" Pack="true" PackagePath="" />
</ItemGroup>
<!-- Exclude old handler files and samples -->
<ItemGroup>
<Compile Remove="Handlers/*.Linux.cs" />
<Compile Remove="samples/**/*.cs" />
<Compile Remove="tests/**/*.cs" />
<Compile Remove="templates/**/*.cs" />
</ItemGroup>
</Project>

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<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
<metadata>
<id>Microsoft.Maui.Controls.Linux</id>
<version>1.0.0-preview.1</version>
<title>.NET MAUI Linux Controls</title>
<authors>MAUI Linux Community Contributors</authors>
<owners>MAUI Linux Community</owners>
<license type="expression">MIT</license>
<projectUrl>https://github.com/dotnet/maui</projectUrl>
<iconUrl>https://raw.githubusercontent.com/dotnet/maui/main/assets/icon.png</iconUrl>
<description>
Linux desktop support for .NET MAUI applications. This experimental package enables running MAUI applications on Linux desktop environments using SkiaSharp for rendering.
Features:
- X11 display server support (primary)
- Wayland support with XWayland fallback
- Skia-rendered controls (Button, Label, Entry, CheckBox, Slider, Switch, layouts)
- Input handling (keyboard, mouse, touch)
- Platform services (Clipboard, FilePicker, Launcher, Preferences)
Note: This is a community preview and not officially supported by Microsoft.
</description>
<releaseNotes>
Initial community preview release:
- Core SkiaSharp-based rendering engine
- X11 window management with input handling
- Basic control set implementation
- Handler alignment with MAUI interface contracts
</releaseNotes>
<copyright>Copyright 2024-2025 .NET Foundation and Contributors</copyright>
<tags>maui linux desktop skia gui cross-platform dotnet</tags>
<repository type="git" url="https://github.com/dotnet/maui.git" />
<dependencies>
<group targetFramework="net9.0">
<dependency id="Microsoft.Maui.Controls" version="9.0.0" />
<dependency id="SkiaSharp" version="2.88.8" />
<dependency id="SkiaSharp.NativeAssets.Linux" version="2.88.8" />
</group>
</dependencies>
<frameworkAssemblies>
<frameworkAssembly assemblyName="System.Runtime" targetFramework="net9.0" />
</frameworkAssemblies>
</metadata>
<files>
<file src="bin/Release/net9.0/Microsoft.Maui.Controls.Linux.dll" target="lib/net9.0" />
<file src="bin/Release/net9.0/Microsoft.Maui.Controls.Linux.xml" target="lib/net9.0" />
<file src="README.md" target="" />
</files>
</package>

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README.md Normal file
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# .NET MAUI Linux Platform
A comprehensive Linux platform implementation for .NET MAUI using SkiaSharp rendering.
[![Build Status](https://github.com/anthropics/maui-linux/actions/workflows/ci.yml/badge.svg)](https://github.com/anthropics/maui-linux/actions)
[![NuGet](https://img.shields.io/nuget/v/Microsoft.Maui.Controls.Linux)](https://www.nuget.org/packages/Microsoft.Maui.Controls.Linux)
[![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
## Overview
This project brings .NET MAUI to Linux desktops with native X11/Wayland support, hardware-accelerated Skia rendering, and full platform service integration.
### Key Features
- **Full Control Library**: 35+ controls including Button, Label, Entry, CarouselView, RefreshView, SwipeView, and more
- **Native Integration**: X11 and Wayland display server support
- **Accessibility**: AT-SPI2 screen reader support and high contrast mode
- **Platform Services**: Clipboard, file picker, notifications, global hotkeys, drag & drop
- **Input Methods**: IBus and XIM support for international text input
- **High DPI**: Automatic scale factor detection for GNOME, KDE, and X11
## Quick Start
### Installation
```bash
# Install the template
dotnet new install Microsoft.Maui.Linux.Templates
# Create a new project
dotnet new maui-linux -n MyApp
cd MyApp
# Run
dotnet run
```
### Manual Installation
```bash
dotnet add package Microsoft.Maui.Controls.Linux --prerelease
```
## Supported Controls
| Category | Controls |
|----------|----------|
| **Basic** | Button, Label, Entry, Editor, CheckBox, Switch, RadioButton |
| **Layout** | StackLayout, ScrollView, Border, Page |
| **Selection** | Picker, DatePicker, TimePicker, Slider, Stepper |
| **Display** | Image, ImageButton, ActivityIndicator, ProgressBar |
| **Collection** | CollectionView, CarouselView, IndicatorView |
| **Gesture** | SwipeView, RefreshView |
| **Navigation** | NavigationPage, TabbedPage, FlyoutPage, Shell |
| **Menu** | MenuBar, MenuFlyout, MenuItem |
| **Graphics** | GraphicsView, Border |
## Platform Services
| Service | Description |
|---------|-------------|
| `ClipboardService` | System clipboard access |
| `FilePickerService` | Native file open dialogs |
| `FolderPickerService` | Folder selection dialogs |
| `NotificationService` | Desktop notifications (libnotify) |
| `GlobalHotkeyService` | System-wide keyboard shortcuts |
| `DragDropService` | XDND drag and drop protocol |
| `LauncherService` | Open URLs and files |
| `ShareService` | Share content with other apps |
| `SecureStorageService` | Encrypted credential storage |
| `PreferencesService` | Application settings |
| `BrowserService` | Open URLs in default browser |
| `EmailService` | Compose emails |
| `SystemTrayService` | System tray icons |
## Accessibility
- **AT-SPI2**: Screen reader support for ORCA and other assistive technologies
- **High Contrast**: Automatic detection and color palette support
- **Keyboard Navigation**: Full keyboard accessibility
## Requirements
- .NET 9.0 SDK or later
- Linux (kernel 5.4+)
- X11 or Wayland
- SkiaSharp native libraries
### System Dependencies
**Ubuntu/Debian:**
```bash
sudo apt-get install libx11-dev libxrandr-dev libxcursor-dev libxi-dev libgl1-mesa-dev libfontconfig1-dev
```
**Fedora:**
```bash
sudo dnf install libX11-devel libXrandr-devel libXcursor-devel libXi-devel mesa-libGL-devel fontconfig-devel
```
## Documentation
- [Getting Started Guide](docs/GETTING_STARTED.md)
- [API Reference](docs/API.md)
- [Contributing Guide](CONTRIBUTING.md)
## Sample Application
```csharp
using Microsoft.Maui.Platform;
var app = new LinuxApplication();
app.MainPage = new ContentPage
{
Content = new VerticalStackLayout
{
Spacing = 10,
Children =
{
new Label
{
Text = "Welcome to MAUI on Linux!",
FontSize = 24
},
new Button
{
Text = "Click Me"
},
new Entry
{
Placeholder = "Enter your name"
}
}
}
};
app.Run();
```
## Building from Source
```bash
git clone https://github.com/anthropics/maui-linux.git
cd maui-linux
dotnet build
dotnet test
```
## Contributing
We welcome contributions! Please see our [Contributing Guide](CONTRIBUTING.md) for details.
## Architecture
```
┌─────────────────────────────────────────────────┐
│ .NET MAUI │
│ (Virtual Views) │
├─────────────────────────────────────────────────┤
│ Handlers │
│ (Platform Abstraction) │
├─────────────────────────────────────────────────┤
│ Skia Views │
│ (SkiaButton, SkiaLabel, etc.) │
├─────────────────────────────────────────────────┤
│ SkiaSharp Rendering │
│ (Hardware Accelerated) │
├─────────────────────────────────────────────────┤
│ X11 / Wayland │
│ (Display Server) │
└─────────────────────────────────────────────────┘
```
## Roadmap
- [x] Core control library (35+ controls)
- [x] Platform services integration
- [x] Accessibility (AT-SPI2)
- [x] Input method support (IBus/XIM)
- [x] High DPI support
- [x] Drag and drop
- [x] Global hotkeys
- [ ] Complete Wayland support
- [ ] Hardware video acceleration
- [ ] GTK4 interop layer
## License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## Acknowledgments
- [SkiaSharp](https://github.com/mono/SkiaSharp) - 2D graphics library
- [.NET MAUI](https://github.com/dotnet/maui) - Cross-platform UI framework
- The .NET community

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Rendering;
/// <summary>
/// Manages dirty rectangles for optimized rendering.
/// Only redraws areas that have been invalidated.
/// </summary>
public class DirtyRectManager
{
private readonly List<SKRect> _dirtyRects = new();
private readonly object _lock = new();
private bool _fullRedrawNeeded = true;
private SKRect _bounds;
private int _maxDirtyRects = 10;
/// <summary>
/// Gets or sets the maximum number of dirty rectangles to track before
/// falling back to a full redraw.
/// </summary>
public int MaxDirtyRects
{
get => _maxDirtyRects;
set => _maxDirtyRects = Math.Max(1, value);
}
/// <summary>
/// Gets whether a full redraw is needed.
/// </summary>
public bool NeedsFullRedraw => _fullRedrawNeeded;
/// <summary>
/// Gets the current dirty rectangles.
/// </summary>
public IReadOnlyList<SKRect> DirtyRects
{
get
{
lock (_lock)
{
return _dirtyRects.ToList();
}
}
}
/// <summary>
/// Gets whether there are any dirty regions.
/// </summary>
public bool HasDirtyRegions
{
get
{
lock (_lock)
{
return _fullRedrawNeeded || _dirtyRects.Count > 0;
}
}
}
/// <summary>
/// Sets the rendering bounds.
/// </summary>
public void SetBounds(SKRect bounds)
{
if (_bounds != bounds)
{
_bounds = bounds;
InvalidateAll();
}
}
/// <summary>
/// Invalidates a specific region.
/// </summary>
public void Invalidate(SKRect rect)
{
if (rect.IsEmpty) return;
lock (_lock)
{
if (_fullRedrawNeeded) return;
// Clamp to bounds
rect = SKRect.Intersect(rect, _bounds);
if (rect.IsEmpty) return;
// Try to merge with existing dirty rects
for (int i = 0; i < _dirtyRects.Count; i++)
{
if (_dirtyRects[i].Contains(rect))
{
// Already covered
return;
}
if (rect.Contains(_dirtyRects[i]))
{
// New rect covers existing
_dirtyRects[i] = rect;
MergeDirtyRects();
return;
}
// Check if they overlap significantly (50% overlap)
var intersection = SKRect.Intersect(_dirtyRects[i], rect);
if (!intersection.IsEmpty)
{
float intersectArea = intersection.Width * intersection.Height;
float smallerArea = Math.Min(
_dirtyRects[i].Width * _dirtyRects[i].Height,
rect.Width * rect.Height);
if (intersectArea > smallerArea * 0.5f)
{
// Merge the rectangles
_dirtyRects[i] = SKRect.Union(_dirtyRects[i], rect);
MergeDirtyRects();
return;
}
}
}
// Add as new dirty rect
_dirtyRects.Add(rect);
// Check if we have too many dirty rects
if (_dirtyRects.Count > _maxDirtyRects)
{
// Fall back to full redraw
_fullRedrawNeeded = true;
_dirtyRects.Clear();
}
}
}
/// <summary>
/// Invalidates the entire rendering area.
/// </summary>
public void InvalidateAll()
{
lock (_lock)
{
_fullRedrawNeeded = true;
_dirtyRects.Clear();
}
}
/// <summary>
/// Clears all dirty regions after rendering.
/// </summary>
public void Clear()
{
lock (_lock)
{
_fullRedrawNeeded = false;
_dirtyRects.Clear();
}
}
/// <summary>
/// Gets the combined dirty region as a single rectangle.
/// </summary>
public SKRect GetCombinedDirtyRect()
{
lock (_lock)
{
if (_fullRedrawNeeded || _dirtyRects.Count == 0)
{
return _bounds;
}
var combined = _dirtyRects[0];
for (int i = 1; i < _dirtyRects.Count; i++)
{
combined = SKRect.Union(combined, _dirtyRects[i]);
}
return combined;
}
}
/// <summary>
/// Applies dirty region clipping to a canvas.
/// </summary>
public void ApplyClipping(SKCanvas canvas)
{
lock (_lock)
{
if (_fullRedrawNeeded || _dirtyRects.Count == 0)
{
// No clipping needed for full redraw
return;
}
// Create a path from all dirty rects
using var path = new SKPath();
foreach (var rect in _dirtyRects)
{
path.AddRect(rect);
}
canvas.ClipPath(path);
}
}
private void MergeDirtyRects()
{
// Simple merge pass - could be optimized
bool merged;
do
{
merged = false;
for (int i = 0; i < _dirtyRects.Count - 1; i++)
{
for (int j = i + 1; j < _dirtyRects.Count; j++)
{
var intersection = SKRect.Intersect(_dirtyRects[i], _dirtyRects[j]);
if (!intersection.IsEmpty)
{
_dirtyRects[i] = SKRect.Union(_dirtyRects[i], _dirtyRects[j]);
_dirtyRects.RemoveAt(j);
merged = true;
break;
}
}
if (merged) break;
}
} while (merged);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Rendering;
/// <summary>
/// Caches rendered content for views that don't change frequently.
/// Improves performance by avoiding redundant rendering.
/// </summary>
public class RenderCache : IDisposable
{
private readonly Dictionary<string, CacheEntry> _cache = new();
private readonly object _lock = new();
private long _maxCacheSize = 50 * 1024 * 1024; // 50 MB default
private long _currentCacheSize;
private bool _disposed;
/// <summary>
/// Gets or sets the maximum cache size in bytes.
/// </summary>
public long MaxCacheSize
{
get => _maxCacheSize;
set
{
_maxCacheSize = Math.Max(1024 * 1024, value); // Minimum 1 MB
TrimCache();
}
}
/// <summary>
/// Gets the current cache size in bytes.
/// </summary>
public long CurrentCacheSize => _currentCacheSize;
/// <summary>
/// Gets the number of cached items.
/// </summary>
public int CachedItemCount
{
get
{
lock (_lock)
{
return _cache.Count;
}
}
}
/// <summary>
/// Tries to get a cached bitmap for the given key.
/// </summary>
public bool TryGet(string key, out SKBitmap? bitmap)
{
lock (_lock)
{
if (_cache.TryGetValue(key, out var entry))
{
entry.LastAccessed = DateTime.UtcNow;
entry.AccessCount++;
bitmap = entry.Bitmap;
return true;
}
}
bitmap = null;
return false;
}
/// <summary>
/// Caches a bitmap with the given key.
/// </summary>
public void Set(string key, SKBitmap bitmap)
{
if (bitmap == null) return;
long bitmapSize = bitmap.ByteCount;
// Don't cache if bitmap is larger than max size
if (bitmapSize > _maxCacheSize)
{
return;
}
lock (_lock)
{
// Remove existing entry if present
if (_cache.TryGetValue(key, out var existing))
{
_currentCacheSize -= existing.Size;
existing.Bitmap?.Dispose();
}
// Create copy of bitmap for cache
var cachedBitmap = bitmap.Copy();
if (cachedBitmap == null) return;
var entry = new CacheEntry
{
Key = key,
Bitmap = cachedBitmap,
Size = bitmapSize,
Created = DateTime.UtcNow,
LastAccessed = DateTime.UtcNow,
AccessCount = 1
};
_cache[key] = entry;
_currentCacheSize += bitmapSize;
// Trim cache if needed
TrimCache();
}
}
/// <summary>
/// Invalidates a cached entry.
/// </summary>
public void Invalidate(string key)
{
lock (_lock)
{
if (_cache.TryGetValue(key, out var entry))
{
_currentCacheSize -= entry.Size;
entry.Bitmap?.Dispose();
_cache.Remove(key);
}
}
}
/// <summary>
/// Invalidates all entries matching a prefix.
/// </summary>
public void InvalidatePrefix(string prefix)
{
lock (_lock)
{
var keysToRemove = _cache.Keys
.Where(k => k.StartsWith(prefix, StringComparison.Ordinal))
.ToList();
foreach (var key in keysToRemove)
{
if (_cache.TryGetValue(key, out var entry))
{
_currentCacheSize -= entry.Size;
entry.Bitmap?.Dispose();
_cache.Remove(key);
}
}
}
}
/// <summary>
/// Clears all cached content.
/// </summary>
public void Clear()
{
lock (_lock)
{
foreach (var entry in _cache.Values)
{
entry.Bitmap?.Dispose();
}
_cache.Clear();
_currentCacheSize = 0;
}
}
/// <summary>
/// Renders content with caching.
/// </summary>
public SKBitmap GetOrCreate(string key, int width, int height, Action<SKCanvas> render)
{
// Check cache first
if (TryGet(key, out var cached) && cached != null &&
cached.Width == width && cached.Height == height)
{
return cached;
}
// Create new bitmap
var bitmap = new SKBitmap(width, height, SKColorType.Rgba8888, SKAlphaType.Premul);
using (var canvas = new SKCanvas(bitmap))
{
canvas.Clear(SKColors.Transparent);
render(canvas);
}
// Cache it
Set(key, bitmap);
return bitmap;
}
private void TrimCache()
{
if (_currentCacheSize <= _maxCacheSize) return;
// Remove least recently used entries until under limit
var entries = _cache.Values
.OrderBy(e => e.LastAccessed)
.ThenBy(e => e.AccessCount)
.ToList();
foreach (var entry in entries)
{
if (_currentCacheSize <= _maxCacheSize * 0.8) // Target 80% usage
{
break;
}
_currentCacheSize -= entry.Size;
entry.Bitmap?.Dispose();
_cache.Remove(entry.Key);
}
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
Clear();
}
private class CacheEntry
{
public string Key { get; set; } = string.Empty;
public SKBitmap? Bitmap { get; set; }
public long Size { get; set; }
public DateTime Created { get; set; }
public DateTime LastAccessed { get; set; }
public int AccessCount { get; set; }
}
}
/// <summary>
/// Provides layered rendering for separating static and dynamic content.
/// </summary>
public class LayeredRenderer : IDisposable
{
private readonly Dictionary<int, RenderLayer> _layers = new();
private readonly object _lock = new();
private bool _disposed;
/// <summary>
/// Gets or creates a render layer.
/// </summary>
public RenderLayer GetLayer(int zIndex)
{
lock (_lock)
{
if (!_layers.TryGetValue(zIndex, out var layer))
{
layer = new RenderLayer(zIndex);
_layers[zIndex] = layer;
}
return layer;
}
}
/// <summary>
/// Removes a render layer.
/// </summary>
public void RemoveLayer(int zIndex)
{
lock (_lock)
{
if (_layers.TryGetValue(zIndex, out var layer))
{
layer.Dispose();
_layers.Remove(zIndex);
}
}
}
/// <summary>
/// Composites all layers onto the target canvas.
/// </summary>
public void Composite(SKCanvas canvas, SKRect bounds)
{
lock (_lock)
{
foreach (var layer in _layers.Values.OrderBy(l => l.ZIndex))
{
layer.DrawTo(canvas, bounds);
}
}
}
/// <summary>
/// Invalidates all layers.
/// </summary>
public void InvalidateAll()
{
lock (_lock)
{
foreach (var layer in _layers.Values)
{
layer.Invalidate();
}
}
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
lock (_lock)
{
foreach (var layer in _layers.Values)
{
layer.Dispose();
}
_layers.Clear();
}
}
}
/// <summary>
/// Represents a single render layer with its own bitmap buffer.
/// </summary>
public class RenderLayer : IDisposable
{
private SKBitmap? _bitmap;
private SKCanvas? _canvas;
private bool _isDirty = true;
private SKRect _bounds;
private bool _disposed;
/// <summary>
/// Gets the Z-index of this layer.
/// </summary>
public int ZIndex { get; }
/// <summary>
/// Gets whether this layer needs to be redrawn.
/// </summary>
public bool IsDirty => _isDirty;
/// <summary>
/// Gets or sets whether this layer is visible.
/// </summary>
public bool IsVisible { get; set; } = true;
/// <summary>
/// Gets or sets the layer opacity (0-1).
/// </summary>
public float Opacity { get; set; } = 1f;
public RenderLayer(int zIndex)
{
ZIndex = zIndex;
}
/// <summary>
/// Prepares the layer for rendering.
/// </summary>
public SKCanvas BeginDraw(SKRect bounds)
{
if (_bitmap == null || _bounds != bounds)
{
_bitmap?.Dispose();
_canvas?.Dispose();
int width = Math.Max(1, (int)bounds.Width);
int height = Math.Max(1, (int)bounds.Height);
_bitmap = new SKBitmap(width, height, SKColorType.Rgba8888, SKAlphaType.Premul);
_canvas = new SKCanvas(_bitmap);
_bounds = bounds;
}
_canvas!.Clear(SKColors.Transparent);
_isDirty = false;
return _canvas;
}
/// <summary>
/// Marks the layer as needing redraw.
/// </summary>
public void Invalidate()
{
_isDirty = true;
}
/// <summary>
/// Draws this layer to the target canvas.
/// </summary>
public void DrawTo(SKCanvas canvas, SKRect bounds)
{
if (!IsVisible || _bitmap == null) return;
using var paint = new SKPaint
{
Color = SKColors.White.WithAlpha((byte)(Opacity * 255))
};
canvas.DrawBitmap(_bitmap, bounds.Left, bounds.Top, paint);
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
_canvas?.Dispose();
_bitmap?.Dispose();
}
}
/// <summary>
/// Provides text rendering optimization with glyph caching.
/// </summary>
public class TextRenderCache : IDisposable
{
private readonly Dictionary<TextCacheKey, SKBitmap> _cache = new();
private readonly object _lock = new();
private int _maxEntries = 500;
private bool _disposed;
/// <summary>
/// Gets or sets the maximum number of cached text entries.
/// </summary>
public int MaxEntries
{
get => _maxEntries;
set => _maxEntries = Math.Max(10, value);
}
/// <summary>
/// Gets a cached text bitmap or creates one.
/// </summary>
public SKBitmap GetOrCreate(string text, SKPaint paint)
{
var key = new TextCacheKey(text, paint);
lock (_lock)
{
if (_cache.TryGetValue(key, out var cached))
{
return cached;
}
// Create text bitmap
var bounds = new SKRect();
paint.MeasureText(text, ref bounds);
int width = Math.Max(1, (int)Math.Ceiling(bounds.Width) + 2);
int height = Math.Max(1, (int)Math.Ceiling(bounds.Height) + 2);
var bitmap = new SKBitmap(width, height, SKColorType.Rgba8888, SKAlphaType.Premul);
using (var canvas = new SKCanvas(bitmap))
{
canvas.Clear(SKColors.Transparent);
canvas.DrawText(text, -bounds.Left + 1, -bounds.Top + 1, paint);
}
// Trim cache if needed
if (_cache.Count >= _maxEntries)
{
var oldest = _cache.First();
oldest.Value.Dispose();
_cache.Remove(oldest.Key);
}
_cache[key] = bitmap;
return bitmap;
}
}
/// <summary>
/// Clears all cached text.
/// </summary>
public void Clear()
{
lock (_lock)
{
foreach (var entry in _cache.Values)
{
entry.Dispose();
}
_cache.Clear();
}
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
Clear();
}
private readonly struct TextCacheKey : IEquatable<TextCacheKey>
{
private readonly string _text;
private readonly float _textSize;
private readonly SKColor _color;
private readonly int _weight;
private readonly int _hashCode;
public TextCacheKey(string text, SKPaint paint)
{
_text = text;
_textSize = paint.TextSize;
_color = paint.Color;
_weight = paint.Typeface?.FontWeight ?? (int)SKFontStyleWeight.Normal;
_hashCode = HashCode.Combine(_text, _textSize, _color, _weight);
}
public bool Equals(TextCacheKey other)
{
return _text == other._text &&
Math.Abs(_textSize - other._textSize) < 0.001f &&
_color == other._color &&
_weight == other._weight;
}
public override bool Equals(object? obj) => obj is TextCacheKey other && Equals(other);
public override int GetHashCode() => _hashCode;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Platform.Linux.Window;
using System.Runtime.InteropServices;
namespace Microsoft.Maui.Platform.Linux.Rendering;
/// <summary>
/// Manages Skia rendering to an X11 window.
/// </summary>
public class SkiaRenderingEngine : IDisposable
{
private readonly X11Window _window;
private SKBitmap? _bitmap;
private SKCanvas? _canvas;
private SKImageInfo _imageInfo;
private bool _disposed;
private bool _fullRedrawNeeded = true;
public static SkiaRenderingEngine? Current { get; private set; }
public ResourceCache ResourceCache { get; }
public int Width => _imageInfo.Width;
public int Height => _imageInfo.Height;
public SkiaRenderingEngine(X11Window window)
{
_window = window;
ResourceCache = new ResourceCache();
Current = this;
CreateSurface(window.Width, window.Height);
_window.Resized += OnWindowResized;
_window.Exposed += OnWindowExposed;
}
private void CreateSurface(int width, int height)
{
_bitmap?.Dispose();
_canvas?.Dispose();
_imageInfo = new SKImageInfo(
Math.Max(1, width),
Math.Max(1, height),
SKColorType.Bgra8888,
SKAlphaType.Premul);
_bitmap = new SKBitmap(_imageInfo);
_canvas = new SKCanvas(_bitmap);
_fullRedrawNeeded = true;
}
private void OnWindowResized(object? sender, (int Width, int Height) size)
{
CreateSurface(size.Width, size.Height);
}
private void OnWindowExposed(object? sender, EventArgs e)
{
_fullRedrawNeeded = true;
}
public void InvalidateAll()
{
_fullRedrawNeeded = true;
}
public void Render(SkiaView rootView)
{
if (_canvas == null || _bitmap == null)
return;
_canvas.Clear(SKColors.White);
// Measure first, then arrange
var availableSize = new SKSize(Width, Height);
rootView.Measure(availableSize);
rootView.Arrange(new SKRect(0, 0, Width, Height));
// Draw the view tree
rootView.Draw(_canvas);
// Draw popup overlays (dropdowns, calendars, etc.) on top
SkiaView.DrawPopupOverlays(_canvas);
_canvas.Flush();
// Present to X11 window
PresentToWindow();
}
private void PresentToWindow()
{
if (_bitmap == null) return;
var pixels = _bitmap.GetPixels();
if (pixels == IntPtr.Zero) return;
_window.DrawPixels(pixels, _imageInfo.Width, _imageInfo.Height, _imageInfo.RowBytes);
}
public SKCanvas? GetCanvas() => _canvas;
protected virtual void Dispose(bool disposing)
{
if (!_disposed)
{
if (disposing)
{
_window.Resized -= OnWindowResized;
_window.Exposed -= OnWindowExposed;
_canvas?.Dispose();
_bitmap?.Dispose();
ResourceCache.Dispose();
if (Current == this) Current = null;
}
_disposed = true;
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
public class ResourceCache : IDisposable
{
private readonly Dictionary<string, SKTypeface> _typefaces = new();
private bool _disposed;
public SKTypeface GetTypeface(string fontFamily, SKFontStyle style)
{
var key = $"{fontFamily}_{style.Weight}_{style.Width}_{style.Slant}";
if (!_typefaces.TryGetValue(key, out var typeface))
{
typeface = SKTypeface.FromFamilyName(fontFamily, style) ?? SKTypeface.Default;
_typefaces[key] = typeface;
}
return typeface;
}
public void Clear()
{
foreach (var tf in _typefaces.Values) tf.Dispose();
_typefaces.Clear();
}
public void Dispose()
{
if (!_disposed) { Clear(); _disposed = true; }
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.ApplicationModel;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux app actions implementation using desktop file actions.
/// </summary>
public class AppActionsService : IAppActions
{
private readonly List<AppAction> _actions = new();
private static readonly string DesktopFilesPath;
static AppActionsService()
{
DesktopFilesPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
"applications");
}
public bool IsSupported => true;
public event EventHandler<AppActionEventArgs>? AppActionActivated;
public Task<IEnumerable<AppAction>> GetAsync()
{
return Task.FromResult<IEnumerable<AppAction>>(_actions.AsReadOnly());
}
public Task SetAsync(IEnumerable<AppAction> actions)
{
_actions.Clear();
_actions.AddRange(actions);
// On Linux, app actions can be exposed via .desktop file Actions
// This would require modifying the application's .desktop file
UpdateDesktopActions();
return Task.CompletedTask;
}
private void UpdateDesktopActions()
{
// Desktop actions are defined in the .desktop file
// Example:
// [Desktop Action new-window]
// Name=New Window
// Exec=myapp --action=new-window
// For a proper implementation, we would need to:
// 1. Find or create the application's .desktop file
// 2. Add [Desktop Action] sections for each action
// 3. The actions would then appear in the dock/launcher right-click menu
// This is a simplified implementation that logs actions
// A full implementation would require more system integration
}
/// <summary>
/// Call this method to handle command-line action arguments.
/// </summary>
public void HandleActionArgument(string actionId)
{
var action = _actions.FirstOrDefault(a => a.Id == actionId);
if (action != null)
{
AppActionActivated?.Invoke(this, new AppActionEventArgs(action));
}
}
/// <summary>
/// Creates a .desktop file for the application with the defined actions.
/// </summary>
public void CreateDesktopFile(string appName, string execPath, string? iconPath = null)
{
try
{
if (!Directory.Exists(DesktopFilesPath))
{
Directory.CreateDirectory(DesktopFilesPath);
}
var desktopContent = GenerateDesktopFileContent(appName, execPath, iconPath);
var desktopFilePath = Path.Combine(DesktopFilesPath, $"{appName.ToLowerInvariant().Replace(" ", "-")}.desktop");
File.WriteAllText(desktopFilePath, desktopContent);
// Make it executable
File.SetUnixFileMode(desktopFilePath,
UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute |
UnixFileMode.GroupRead | UnixFileMode.OtherRead);
}
catch
{
// Silently fail - desktop file creation is optional
}
}
private string GenerateDesktopFileContent(string appName, string execPath, string? iconPath)
{
var content = new System.Text.StringBuilder();
content.AppendLine("[Desktop Entry]");
content.AppendLine("Type=Application");
content.AppendLine($"Name={appName}");
content.AppendLine($"Exec={execPath} %U");
if (!string.IsNullOrEmpty(iconPath) && File.Exists(iconPath))
{
content.AppendLine($"Icon={iconPath}");
}
content.AppendLine("Terminal=false");
content.AppendLine("Categories=Utility;");
// Add actions list
if (_actions.Count > 0)
{
var actionIds = string.Join(";", _actions.Select(a => a.Id));
content.AppendLine($"Actions={actionIds};");
content.AppendLine();
// Add each action section
foreach (var action in _actions)
{
content.AppendLine($"[Desktop Action {action.Id}]");
content.AppendLine($"Name={action.Title}");
if (!string.IsNullOrEmpty(action.Subtitle))
{
content.AppendLine($"Comment={action.Subtitle}");
}
content.AppendLine($"Exec={execPath} --action={action.Id}");
{
}
content.AppendLine();
}
}
return content.ToString();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Concurrent;
using System.Runtime.InteropServices;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// AT-SPI2 accessibility service implementation.
/// Provides screen reader support through the AT-SPI2 D-Bus interface.
/// </summary>
public class AtSpi2AccessibilityService : IAccessibilityService, IDisposable
{
private nint _connection;
private nint _registry;
private bool _isEnabled;
private bool _disposed;
private IAccessible? _focusedAccessible;
private readonly ConcurrentDictionary<string, IAccessible> _registeredObjects = new();
private readonly string _applicationName;
private nint _applicationAccessible;
public bool IsEnabled => _isEnabled;
public AtSpi2AccessibilityService(string applicationName = "MAUI Application")
{
_applicationName = applicationName;
}
public void Initialize()
{
try
{
// Initialize AT-SPI2
int result = atspi_init();
if (result != 0)
{
Console.WriteLine("AtSpi2AccessibilityService: Failed to initialize AT-SPI2");
return;
}
// Check if accessibility is enabled
_isEnabled = CheckAccessibilityEnabled();
if (_isEnabled)
{
// Get the desktop (root accessible)
_registry = atspi_get_desktop(0);
// Register our application
RegisterApplication();
Console.WriteLine("AtSpi2AccessibilityService: Initialized successfully");
}
else
{
Console.WriteLine("AtSpi2AccessibilityService: Accessibility is not enabled");
}
}
catch (Exception ex)
{
Console.WriteLine($"AtSpi2AccessibilityService: Initialization failed - {ex.Message}");
}
}
private bool CheckAccessibilityEnabled()
{
// Check if AT-SPI2 registry is available
try
{
nint desktop = atspi_get_desktop(0);
if (desktop != IntPtr.Zero)
{
g_object_unref(desktop);
return true;
}
}
catch
{
// AT-SPI2 not available
}
// Also check the gsettings key
var enabled = Environment.GetEnvironmentVariable("GTK_A11Y");
return enabled?.ToLowerInvariant() != "none";
}
private void RegisterApplication()
{
// In a full implementation, we would create an AtspiApplication object
// and register it with the AT-SPI2 registry. For now, we set up the basics.
// Set application name
atspi_set_main_context(IntPtr.Zero);
}
public void Register(IAccessible accessible)
{
if (accessible == null) return;
_registeredObjects.TryAdd(accessible.AccessibleId, accessible);
// In a full implementation, we would create an AtspiAccessible object
// and register it with AT-SPI2
}
public void Unregister(IAccessible accessible)
{
if (accessible == null) return;
_registeredObjects.TryRemove(accessible.AccessibleId, out _);
// Clean up AT-SPI2 resources for this accessible
}
public void NotifyFocusChanged(IAccessible? accessible)
{
_focusedAccessible = accessible;
if (!_isEnabled || accessible == null) return;
// Emit focus event through AT-SPI2
EmitEvent("focus:", accessible);
}
public void NotifyPropertyChanged(IAccessible accessible, AccessibleProperty property)
{
if (!_isEnabled || accessible == null) return;
string eventName = property switch
{
AccessibleProperty.Name => "object:property-change:accessible-name",
AccessibleProperty.Description => "object:property-change:accessible-description",
AccessibleProperty.Role => "object:property-change:accessible-role",
AccessibleProperty.Value => "object:property-change:accessible-value",
AccessibleProperty.Parent => "object:property-change:accessible-parent",
AccessibleProperty.Children => "object:children-changed",
_ => string.Empty
};
if (!string.IsNullOrEmpty(eventName))
{
EmitEvent(eventName, accessible);
}
}
public void NotifyStateChanged(IAccessible accessible, AccessibleState state, bool value)
{
if (!_isEnabled || accessible == null) return;
string stateName = state.ToString().ToLowerInvariant();
string eventName = $"object:state-changed:{stateName}";
EmitEvent(eventName, accessible, value ? 1 : 0);
}
public void Announce(string text, AnnouncementPriority priority = AnnouncementPriority.Polite)
{
if (!_isEnabled || string.IsNullOrEmpty(text)) return;
// Use AT-SPI2 live region to announce text
// Priority maps to: Polite = ATSPI_LIVE_POLITE, Assertive = ATSPI_LIVE_ASSERTIVE
try
{
// In AT-SPI2, announcements are typically done through live regions
// or by emitting "object:announcement" events
// For now, use a simpler approach with the event system
Console.WriteLine($"[Accessibility Announcement ({priority})]: {text}");
}
catch (Exception ex)
{
Console.WriteLine($"AtSpi2AccessibilityService: Announcement failed - {ex.Message}");
}
}
private void EmitEvent(string eventName, IAccessible accessible, int detail1 = 0, int detail2 = 0)
{
// In a full implementation, we would emit the event through D-Bus
// using the org.a11y.atspi.Event interface
// For now, log the event for debugging
Console.WriteLine($"[AT-SPI2 Event] {eventName}: {accessible.AccessibleName} ({accessible.Role})");
}
/// <summary>
/// Gets the AT-SPI2 role value for the given accessible role.
/// </summary>
public static int GetAtSpiRole(AccessibleRole role)
{
return role switch
{
AccessibleRole.Unknown => ATSPI_ROLE_UNKNOWN,
AccessibleRole.Window => ATSPI_ROLE_WINDOW,
AccessibleRole.Application => ATSPI_ROLE_APPLICATION,
AccessibleRole.Panel => ATSPI_ROLE_PANEL,
AccessibleRole.Frame => ATSPI_ROLE_FRAME,
AccessibleRole.Button => ATSPI_ROLE_PUSH_BUTTON,
AccessibleRole.CheckBox => ATSPI_ROLE_CHECK_BOX,
AccessibleRole.RadioButton => ATSPI_ROLE_RADIO_BUTTON,
AccessibleRole.ComboBox => ATSPI_ROLE_COMBO_BOX,
AccessibleRole.Entry => ATSPI_ROLE_ENTRY,
AccessibleRole.Label => ATSPI_ROLE_LABEL,
AccessibleRole.List => ATSPI_ROLE_LIST,
AccessibleRole.ListItem => ATSPI_ROLE_LIST_ITEM,
AccessibleRole.Menu => ATSPI_ROLE_MENU,
AccessibleRole.MenuBar => ATSPI_ROLE_MENU_BAR,
AccessibleRole.MenuItem => ATSPI_ROLE_MENU_ITEM,
AccessibleRole.ScrollBar => ATSPI_ROLE_SCROLL_BAR,
AccessibleRole.Slider => ATSPI_ROLE_SLIDER,
AccessibleRole.SpinButton => ATSPI_ROLE_SPIN_BUTTON,
AccessibleRole.StatusBar => ATSPI_ROLE_STATUS_BAR,
AccessibleRole.Tab => ATSPI_ROLE_PAGE_TAB,
AccessibleRole.TabPanel => ATSPI_ROLE_PAGE_TAB_LIST,
AccessibleRole.Text => ATSPI_ROLE_TEXT,
AccessibleRole.ToggleButton => ATSPI_ROLE_TOGGLE_BUTTON,
AccessibleRole.ToolBar => ATSPI_ROLE_TOOL_BAR,
AccessibleRole.ToolTip => ATSPI_ROLE_TOOL_TIP,
AccessibleRole.Tree => ATSPI_ROLE_TREE,
AccessibleRole.TreeItem => ATSPI_ROLE_TREE_ITEM,
AccessibleRole.Image => ATSPI_ROLE_IMAGE,
AccessibleRole.ProgressBar => ATSPI_ROLE_PROGRESS_BAR,
AccessibleRole.Separator => ATSPI_ROLE_SEPARATOR,
AccessibleRole.Link => ATSPI_ROLE_LINK,
AccessibleRole.Table => ATSPI_ROLE_TABLE,
AccessibleRole.TableCell => ATSPI_ROLE_TABLE_CELL,
AccessibleRole.TableRow => ATSPI_ROLE_TABLE_ROW,
AccessibleRole.TableColumnHeader => ATSPI_ROLE_TABLE_COLUMN_HEADER,
AccessibleRole.TableRowHeader => ATSPI_ROLE_TABLE_ROW_HEADER,
AccessibleRole.PageTab => ATSPI_ROLE_PAGE_TAB,
AccessibleRole.PageTabList => ATSPI_ROLE_PAGE_TAB_LIST,
AccessibleRole.Dialog => ATSPI_ROLE_DIALOG,
AccessibleRole.Alert => ATSPI_ROLE_ALERT,
AccessibleRole.Filler => ATSPI_ROLE_FILLER,
AccessibleRole.Icon => ATSPI_ROLE_ICON,
AccessibleRole.Canvas => ATSPI_ROLE_CANVAS,
_ => ATSPI_ROLE_UNKNOWN
};
}
/// <summary>
/// Converts accessible states to AT-SPI2 state set.
/// </summary>
public static (uint Low, uint High) GetAtSpiStates(AccessibleStates states)
{
uint low = 0;
uint high = 0;
if (states.HasFlag(AccessibleStates.Active)) low |= 1 << 0;
if (states.HasFlag(AccessibleStates.Armed)) low |= 1 << 1;
if (states.HasFlag(AccessibleStates.Busy)) low |= 1 << 2;
if (states.HasFlag(AccessibleStates.Checked)) low |= 1 << 3;
if (states.HasFlag(AccessibleStates.Collapsed)) low |= 1 << 4;
if (states.HasFlag(AccessibleStates.Defunct)) low |= 1 << 5;
if (states.HasFlag(AccessibleStates.Editable)) low |= 1 << 6;
if (states.HasFlag(AccessibleStates.Enabled)) low |= 1 << 7;
if (states.HasFlag(AccessibleStates.Expandable)) low |= 1 << 8;
if (states.HasFlag(AccessibleStates.Expanded)) low |= 1 << 9;
if (states.HasFlag(AccessibleStates.Focusable)) low |= 1 << 10;
if (states.HasFlag(AccessibleStates.Focused)) low |= 1 << 11;
if (states.HasFlag(AccessibleStates.Horizontal)) low |= 1 << 13;
if (states.HasFlag(AccessibleStates.Iconified)) low |= 1 << 14;
if (states.HasFlag(AccessibleStates.Modal)) low |= 1 << 15;
if (states.HasFlag(AccessibleStates.MultiLine)) low |= 1 << 16;
if (states.HasFlag(AccessibleStates.MultiSelectable)) low |= 1 << 17;
if (states.HasFlag(AccessibleStates.Opaque)) low |= 1 << 18;
if (states.HasFlag(AccessibleStates.Pressed)) low |= 1 << 19;
if (states.HasFlag(AccessibleStates.Resizable)) low |= 1 << 20;
if (states.HasFlag(AccessibleStates.Selectable)) low |= 1 << 21;
if (states.HasFlag(AccessibleStates.Selected)) low |= 1 << 22;
if (states.HasFlag(AccessibleStates.Sensitive)) low |= 1 << 23;
if (states.HasFlag(AccessibleStates.Showing)) low |= 1 << 24;
if (states.HasFlag(AccessibleStates.SingleLine)) low |= 1 << 25;
if (states.HasFlag(AccessibleStates.Stale)) low |= 1 << 26;
if (states.HasFlag(AccessibleStates.Transient)) low |= 1 << 27;
if (states.HasFlag(AccessibleStates.Vertical)) low |= 1 << 28;
if (states.HasFlag(AccessibleStates.Visible)) low |= 1 << 29;
if (states.HasFlag(AccessibleStates.ManagesDescendants)) low |= 1 << 30;
if (states.HasFlag(AccessibleStates.Indeterminate)) low |= 1u << 31;
// High bits (states 32+)
if (states.HasFlag(AccessibleStates.Required)) high |= 1 << 0;
if (states.HasFlag(AccessibleStates.Truncated)) high |= 1 << 1;
if (states.HasFlag(AccessibleStates.Animated)) high |= 1 << 2;
if (states.HasFlag(AccessibleStates.InvalidEntry)) high |= 1 << 3;
if (states.HasFlag(AccessibleStates.SupportsAutocompletion)) high |= 1 << 4;
if (states.HasFlag(AccessibleStates.SelectableText)) high |= 1 << 5;
if (states.HasFlag(AccessibleStates.IsDefault)) high |= 1 << 6;
if (states.HasFlag(AccessibleStates.Visited)) high |= 1 << 7;
if (states.HasFlag(AccessibleStates.ReadOnly)) high |= 1 << 10;
return (low, high);
}
public void Shutdown()
{
Dispose();
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
_registeredObjects.Clear();
if (_applicationAccessible != IntPtr.Zero)
{
g_object_unref(_applicationAccessible);
_applicationAccessible = IntPtr.Zero;
}
if (_registry != IntPtr.Zero)
{
g_object_unref(_registry);
_registry = IntPtr.Zero;
}
// Exit AT-SPI2
atspi_exit();
}
#region AT-SPI2 Role Constants
private const int ATSPI_ROLE_UNKNOWN = 0;
private const int ATSPI_ROLE_WINDOW = 22;
private const int ATSPI_ROLE_APPLICATION = 75;
private const int ATSPI_ROLE_PANEL = 25;
private const int ATSPI_ROLE_FRAME = 11;
private const int ATSPI_ROLE_PUSH_BUTTON = 31;
private const int ATSPI_ROLE_CHECK_BOX = 4;
private const int ATSPI_ROLE_RADIO_BUTTON = 33;
private const int ATSPI_ROLE_COMBO_BOX = 6;
private const int ATSPI_ROLE_ENTRY = 24;
private const int ATSPI_ROLE_LABEL = 16;
private const int ATSPI_ROLE_LIST = 17;
private const int ATSPI_ROLE_LIST_ITEM = 18;
private const int ATSPI_ROLE_MENU = 19;
private const int ATSPI_ROLE_MENU_BAR = 20;
private const int ATSPI_ROLE_MENU_ITEM = 21;
private const int ATSPI_ROLE_SCROLL_BAR = 40;
private const int ATSPI_ROLE_SLIDER = 43;
private const int ATSPI_ROLE_SPIN_BUTTON = 44;
private const int ATSPI_ROLE_STATUS_BAR = 46;
private const int ATSPI_ROLE_PAGE_TAB = 26;
private const int ATSPI_ROLE_PAGE_TAB_LIST = 27;
private const int ATSPI_ROLE_TEXT = 49;
private const int ATSPI_ROLE_TOGGLE_BUTTON = 51;
private const int ATSPI_ROLE_TOOL_BAR = 52;
private const int ATSPI_ROLE_TOOL_TIP = 53;
private const int ATSPI_ROLE_TREE = 54;
private const int ATSPI_ROLE_TREE_ITEM = 55;
private const int ATSPI_ROLE_IMAGE = 14;
private const int ATSPI_ROLE_PROGRESS_BAR = 30;
private const int ATSPI_ROLE_SEPARATOR = 42;
private const int ATSPI_ROLE_LINK = 83;
private const int ATSPI_ROLE_TABLE = 47;
private const int ATSPI_ROLE_TABLE_CELL = 48;
private const int ATSPI_ROLE_TABLE_ROW = 89;
private const int ATSPI_ROLE_TABLE_COLUMN_HEADER = 36;
private const int ATSPI_ROLE_TABLE_ROW_HEADER = 37;
private const int ATSPI_ROLE_DIALOG = 8;
private const int ATSPI_ROLE_ALERT = 2;
private const int ATSPI_ROLE_FILLER = 10;
private const int ATSPI_ROLE_ICON = 13;
private const int ATSPI_ROLE_CANVAS = 3;
#endregion
#region AT-SPI2 Interop
[DllImport("libatspi.so.0")]
private static extern int atspi_init();
[DllImport("libatspi.so.0")]
private static extern int atspi_exit();
[DllImport("libatspi.so.0")]
private static extern nint atspi_get_desktop(int i);
[DllImport("libatspi.so.0")]
private static extern void atspi_set_main_context(nint context);
[DllImport("libgobject-2.0.so.0")]
private static extern void g_object_unref(nint obj);
#endregion
}
/// <summary>
/// Factory for creating accessibility service instances.
/// </summary>
public static class AccessibilityServiceFactory
{
private static IAccessibilityService? _instance;
private static readonly object _lock = new();
/// <summary>
/// Gets the singleton accessibility service instance.
/// </summary>
public static IAccessibilityService Instance
{
get
{
if (_instance == null)
{
lock (_lock)
{
_instance ??= CreateService();
}
}
return _instance;
}
}
private static IAccessibilityService CreateService()
{
try
{
var service = new AtSpi2AccessibilityService();
service.Initialize();
return service;
}
catch (Exception ex)
{
Console.WriteLine($"AccessibilityServiceFactory: Failed to create AT-SPI2 service - {ex.Message}");
return new NullAccessibilityService();
}
}
/// <summary>
/// Resets the singleton instance.
/// </summary>
public static void Reset()
{
lock (_lock)
{
_instance?.Shutdown();
_instance = null;
}
}
}
/// <summary>
/// Null implementation of accessibility service.
/// </summary>
public class NullAccessibilityService : IAccessibilityService
{
public bool IsEnabled => false;
public void Initialize() { }
public void Register(IAccessible accessible) { }
public void Unregister(IAccessible accessible) { }
public void NotifyFocusChanged(IAccessible? accessible) { }
public void NotifyPropertyChanged(IAccessible accessible, AccessibleProperty property) { }
public void NotifyStateChanged(IAccessible accessible, AccessibleState state, bool value) { }
public void Announce(string text, AnnouncementPriority priority = AnnouncementPriority.Polite) { }
public void Shutdown() { }
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using Microsoft.Maui.ApplicationModel;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux browser implementation using xdg-open.
/// </summary>
public class BrowserService : IBrowser
{
public async Task<bool> OpenAsync(string uri)
{
return await OpenAsync(new Uri(uri), BrowserLaunchMode.SystemPreferred);
}
public async Task<bool> OpenAsync(string uri, BrowserLaunchMode launchMode)
{
return await OpenAsync(new Uri(uri), launchMode);
}
public async Task<bool> OpenAsync(Uri uri)
{
return await OpenAsync(uri, BrowserLaunchMode.SystemPreferred);
}
public async Task<bool> OpenAsync(Uri uri, BrowserLaunchMode launchMode)
{
return await OpenAsync(uri, new BrowserLaunchOptions { LaunchMode = launchMode });
}
public async Task<bool> OpenAsync(Uri uri, BrowserLaunchOptions options)
{
if (uri == null)
throw new ArgumentNullException(nameof(uri));
try
{
var uriString = uri.AbsoluteUri;
// Use xdg-open which respects user's default browser
var startInfo = new ProcessStartInfo
{
FileName = "xdg-open",
Arguments = $"\"{uriString}\"",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null)
return false;
await process.WaitForExitAsync();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
using System.Diagnostics;
using Microsoft.Maui.ApplicationModel.DataTransfer;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux clipboard implementation using xclip/xsel command line tools.
/// </summary>
public class ClipboardService : IClipboard
{
private string? _lastSetText;
public bool HasText
{
get
{
try
{
var result = GetTextAsync().GetAwaiter().GetResult();
return !string.IsNullOrEmpty(result);
}
catch
{
return false;
}
}
}
public event EventHandler<EventArgs>? ClipboardContentChanged;
public async Task<string?> GetTextAsync()
{
// Try xclip first
var result = await TryGetWithXclip();
if (result != null) return result;
// Try xsel as fallback
return await TryGetWithXsel();
}
public async Task SetTextAsync(string? text)
{
_lastSetText = text;
if (string.IsNullOrEmpty(text))
{
await ClearClipboard();
return;
}
// Try xclip first
var success = await TrySetWithXclip(text);
if (!success)
{
// Try xsel as fallback
await TrySetWithXsel(text);
}
ClipboardContentChanged?.Invoke(this, EventArgs.Empty);
}
private async Task<string?> TryGetWithXclip()
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "xclip",
Arguments = "-selection clipboard -o",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return null;
var output = await process.StandardOutput.ReadToEndAsync();
await process.WaitForExitAsync();
return process.ExitCode == 0 ? output : null;
}
catch
{
return null;
}
}
private async Task<string?> TryGetWithXsel()
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "xsel",
Arguments = "--clipboard --output",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return null;
var output = await process.StandardOutput.ReadToEndAsync();
await process.WaitForExitAsync();
return process.ExitCode == 0 ? output : null;
}
catch
{
return null;
}
}
private async Task<bool> TrySetWithXclip(string text)
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "xclip",
Arguments = "-selection clipboard",
UseShellExecute = false,
RedirectStandardInput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return false;
await process.StandardInput.WriteAsync(text);
process.StandardInput.Close();
await process.WaitForExitAsync();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
private async Task<bool> TrySetWithXsel(string text)
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "xsel",
Arguments = "--clipboard --input",
UseShellExecute = false,
RedirectStandardInput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return false;
await process.StandardInput.WriteAsync(text);
process.StandardInput.Close();
await process.WaitForExitAsync();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
private async Task ClearClipboard()
{
try
{
// Try xclip first
var startInfo = new ProcessStartInfo
{
FileName = "xclip",
Arguments = "-selection clipboard",
UseShellExecute = false,
RedirectStandardInput = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
process.StandardInput.Close();
await process.WaitForExitAsync();
}
}
catch
{
// Ignore errors when clearing
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
using SkiaSharp;
using Microsoft.Maui.Platform.Linux.Window;
using Microsoft.Maui.Platform.Linux.Rendering;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Supported display server types.
/// </summary>
public enum DisplayServerType
{
Auto,
X11,
Wayland
}
/// <summary>
/// Factory for creating display server connections.
/// Supports X11 and Wayland display servers.
/// </summary>
public static class DisplayServerFactory
{
private static DisplayServerType? _cachedServerType;
/// <summary>
/// Detects the current display server type.
/// </summary>
public static DisplayServerType DetectDisplayServer()
{
if (_cachedServerType.HasValue)
return _cachedServerType.Value;
// Check for Wayland first (modern default)
var waylandDisplay = Environment.GetEnvironmentVariable("WAYLAND_DISPLAY");
if (!string.IsNullOrEmpty(waylandDisplay))
{
// Check if XWayland is available - prefer it for now until native Wayland is fully tested
var xDisplay = Environment.GetEnvironmentVariable("DISPLAY");
var preferX11 = Environment.GetEnvironmentVariable("MAUI_PREFER_X11");
if (!string.IsNullOrEmpty(xDisplay) && !string.IsNullOrEmpty(preferX11))
{
Console.WriteLine("[DisplayServer] XWayland detected, using X11 backend (MAUI_PREFER_X11 set)");
_cachedServerType = DisplayServerType.X11;
return DisplayServerType.X11;
}
Console.WriteLine("[DisplayServer] Wayland display detected");
_cachedServerType = DisplayServerType.Wayland;
return DisplayServerType.Wayland;
}
// Fall back to X11
var x11Display = Environment.GetEnvironmentVariable("DISPLAY");
if (!string.IsNullOrEmpty(x11Display))
{
Console.WriteLine("[DisplayServer] X11 display detected");
_cachedServerType = DisplayServerType.X11;
return DisplayServerType.X11;
}
// Default to X11 and let it fail if not available
Console.WriteLine("[DisplayServer] No display server detected, defaulting to X11");
_cachedServerType = DisplayServerType.X11;
return DisplayServerType.X11;
}
/// <summary>
/// Creates a window for the specified or detected display server.
/// </summary>
public static IDisplayWindow CreateWindow(string title, int width, int height, DisplayServerType serverType = DisplayServerType.Auto)
{
if (serverType == DisplayServerType.Auto)
{
serverType = DetectDisplayServer();
}
return serverType switch
{
DisplayServerType.X11 => CreateX11Window(title, width, height),
DisplayServerType.Wayland => CreateWaylandWindow(title, width, height),
_ => CreateX11Window(title, width, height)
};
}
private static IDisplayWindow CreateX11Window(string title, int width, int height)
{
try
{
Console.WriteLine($"[DisplayServer] Creating X11 window: {title} ({width}x{height})");
return new X11DisplayWindow(title, width, height);
}
catch (Exception ex)
{
Console.WriteLine($"[DisplayServer] Failed to create X11 window: {ex.Message}");
throw;
}
}
private static IDisplayWindow CreateWaylandWindow(string title, int width, int height)
{
try
{
Console.WriteLine($"[DisplayServer] Creating Wayland window: {title} ({width}x{height})");
return new WaylandDisplayWindow(title, width, height);
}
catch (Exception ex)
{
Console.WriteLine($"[DisplayServer] Failed to create Wayland window: {ex.Message}");
// Try to fall back to X11 via XWayland
var xDisplay = Environment.GetEnvironmentVariable("DISPLAY");
if (!string.IsNullOrEmpty(xDisplay))
{
Console.WriteLine("[DisplayServer] Falling back to X11 (XWayland)");
return CreateX11Window(title, width, height);
}
throw;
}
}
/// <summary>
/// Gets a human-readable name for the display server.
/// </summary>
public static string GetDisplayServerName(DisplayServerType serverType = DisplayServerType.Auto)
{
if (serverType == DisplayServerType.Auto)
serverType = DetectDisplayServer();
return serverType switch
{
DisplayServerType.X11 => "X11",
DisplayServerType.Wayland => "Wayland",
_ => "Unknown"
};
}
}
/// <summary>
/// Common interface for display server windows.
/// </summary>
public interface IDisplayWindow : IDisposable
{
int Width { get; }
int Height { get; }
bool IsRunning { get; }
void Show();
void Hide();
void SetTitle(string title);
void Resize(int width, int height);
void ProcessEvents();
void Stop();
event EventHandler<KeyEventArgs>? KeyDown;
event EventHandler<KeyEventArgs>? KeyUp;
event EventHandler<TextInputEventArgs>? TextInput;
event EventHandler<PointerEventArgs>? PointerMoved;
event EventHandler<PointerEventArgs>? PointerPressed;
event EventHandler<PointerEventArgs>? PointerReleased;
event EventHandler<ScrollEventArgs>? Scroll;
event EventHandler? Exposed;
event EventHandler<(int Width, int Height)>? Resized;
event EventHandler? CloseRequested;
}
/// <summary>
/// X11 display window wrapper implementing the common interface.
/// </summary>
public class X11DisplayWindow : IDisplayWindow
{
private readonly X11Window _window;
public int Width => _window.Width;
public int Height => _window.Height;
public bool IsRunning => _window.IsRunning;
public event EventHandler<KeyEventArgs>? KeyDown;
public event EventHandler<KeyEventArgs>? KeyUp;
public event EventHandler<TextInputEventArgs>? TextInput;
public event EventHandler<PointerEventArgs>? PointerMoved;
public event EventHandler<PointerEventArgs>? PointerPressed;
public event EventHandler<PointerEventArgs>? PointerReleased;
public event EventHandler<ScrollEventArgs>? Scroll;
public event EventHandler? Exposed;
public event EventHandler<(int Width, int Height)>? Resized;
public event EventHandler? CloseRequested;
public X11DisplayWindow(string title, int width, int height)
{
_window = new X11Window(title, width, height);
_window.KeyDown += (s, e) => KeyDown?.Invoke(this, e);
_window.KeyUp += (s, e) => KeyUp?.Invoke(this, e);
_window.TextInput += (s, e) => TextInput?.Invoke(this, e);
_window.PointerMoved += (s, e) => PointerMoved?.Invoke(this, e);
_window.PointerPressed += (s, e) => PointerPressed?.Invoke(this, e);
_window.PointerReleased += (s, e) => PointerReleased?.Invoke(this, e);
_window.Scroll += (s, e) => Scroll?.Invoke(this, e);
_window.Exposed += (s, e) => Exposed?.Invoke(this, e);
_window.Resized += (s, e) => Resized?.Invoke(this, e);
_window.CloseRequested += (s, e) => CloseRequested?.Invoke(this, e);
}
public void Show() => _window.Show();
public void Hide() => _window.Hide();
public void SetTitle(string title) => _window.SetTitle(title);
public void Resize(int width, int height) => _window.Resize(width, height);
public void ProcessEvents() => _window.ProcessEvents();
public void Stop() => _window.Stop();
public void Dispose() => _window.Dispose();
}
/// <summary>
/// Wayland display window wrapper implementing IDisplayWindow.
/// Uses wl_shm for software rendering with SkiaSharp.
/// </summary>
public class WaylandDisplayWindow : IDisplayWindow
{
#region Native Interop
private const string LibWaylandClient = "libwayland-client.so.0";
[DllImport(LibWaylandClient)]
private static extern IntPtr wl_display_connect(string? name);
[DllImport(LibWaylandClient)]
private static extern void wl_display_disconnect(IntPtr display);
[DllImport(LibWaylandClient)]
private static extern int wl_display_dispatch(IntPtr display);
[DllImport(LibWaylandClient)]
private static extern int wl_display_dispatch_pending(IntPtr display);
[DllImport(LibWaylandClient)]
private static extern int wl_display_roundtrip(IntPtr display);
[DllImport(LibWaylandClient)]
private static extern int wl_display_flush(IntPtr display);
[DllImport(LibWaylandClient)]
private static extern IntPtr wl_display_get_registry(IntPtr display);
[DllImport(LibWaylandClient)]
private static extern IntPtr wl_compositor_create_surface(IntPtr compositor);
[DllImport(LibWaylandClient)]
private static extern void wl_surface_attach(IntPtr surface, IntPtr buffer, int x, int y);
[DllImport(LibWaylandClient)]
private static extern void wl_surface_damage(IntPtr surface, int x, int y, int width, int height);
[DllImport(LibWaylandClient)]
private static extern void wl_surface_commit(IntPtr surface);
[DllImport(LibWaylandClient)]
private static extern void wl_surface_destroy(IntPtr surface);
[DllImport(LibWaylandClient)]
private static extern IntPtr wl_shm_create_pool(IntPtr shm, int fd, int size);
[DllImport(LibWaylandClient)]
private static extern void wl_shm_pool_destroy(IntPtr pool);
[DllImport(LibWaylandClient)]
private static extern IntPtr wl_shm_pool_create_buffer(IntPtr pool, int offset, int width, int height, int stride, uint format);
[DllImport(LibWaylandClient)]
private static extern void wl_buffer_destroy(IntPtr buffer);
[DllImport("libc", EntryPoint = "shm_open")]
private static extern int shm_open([MarshalAs(UnmanagedType.LPStr)] string name, int oflag, int mode);
[DllImport("libc", EntryPoint = "shm_unlink")]
private static extern int shm_unlink([MarshalAs(UnmanagedType.LPStr)] string name);
[DllImport("libc", EntryPoint = "ftruncate")]
private static extern int ftruncate(int fd, long length);
[DllImport("libc", EntryPoint = "mmap")]
private static extern IntPtr mmap(IntPtr addr, nuint length, int prot, int flags, int fd, long offset);
[DllImport("libc", EntryPoint = "munmap")]
private static extern int munmap(IntPtr addr, nuint length);
[DllImport("libc", EntryPoint = "close")]
private static extern int close(int fd);
private const int O_RDWR = 2;
private const int O_CREAT = 0x40;
private const int O_EXCL = 0x80;
private const int PROT_READ = 1;
private const int PROT_WRITE = 2;
private const int MAP_SHARED = 1;
private const uint WL_SHM_FORMAT_XRGB8888 = 1;
#endregion
private IntPtr _display;
private IntPtr _registry;
private IntPtr _compositor;
private IntPtr _shm;
private IntPtr _surface;
private IntPtr _shmPool;
private IntPtr _buffer;
private IntPtr _pixelData;
private int _shmFd = -1;
private int _bufferSize;
private int _width;
private int _height;
private string _title;
private bool _isRunning;
private bool _disposed;
private SKBitmap? _bitmap;
private SKCanvas? _canvas;
public int Width => _width;
public int Height => _height;
public bool IsRunning => _isRunning;
public event EventHandler<KeyEventArgs>? KeyDown;
public event EventHandler<KeyEventArgs>? KeyUp;
public event EventHandler<TextInputEventArgs>? TextInput;
public event EventHandler<PointerEventArgs>? PointerMoved;
public event EventHandler<PointerEventArgs>? PointerPressed;
public event EventHandler<PointerEventArgs>? PointerReleased;
public event EventHandler<ScrollEventArgs>? Scroll;
public event EventHandler? Exposed;
public event EventHandler<(int Width, int Height)>? Resized;
public event EventHandler? CloseRequested;
public WaylandDisplayWindow(string title, int width, int height)
{
_title = title;
_width = width;
_height = height;
Initialize();
}
private void Initialize()
{
_display = wl_display_connect(null);
if (_display == IntPtr.Zero)
{
throw new InvalidOperationException("Failed to connect to Wayland display. Is WAYLAND_DISPLAY set?");
}
_registry = wl_display_get_registry(_display);
if (_registry == IntPtr.Zero)
{
throw new InvalidOperationException("Failed to get Wayland registry");
}
// Note: A full implementation would set up registry listeners to get
// compositor and shm handles. For now, we throw an informative error
// and fall back to X11 via XWayland in DisplayServerFactory.
// This is a placeholder - proper Wayland support requires:
// 1. Setting up wl_registry_listener with callbacks
// 2. Binding to wl_compositor, wl_shm, wl_seat, xdg_wm_base
// 3. Implementing the xdg-shell protocol for toplevel windows
wl_display_roundtrip(_display);
// For now, signal that native Wayland isn't fully implemented
throw new NotSupportedException(
"Native Wayland support is experimental. " +
"Set MAUI_PREFER_X11=1 to use XWayland, or run with DISPLAY set.");
}
private void CreateShmBuffer()
{
int stride = _width * 4;
_bufferSize = stride * _height;
string shmName = $"/maui-shm-{Environment.ProcessId}-{DateTime.Now.Ticks}";
_shmFd = shm_open(shmName, O_RDWR | O_CREAT | O_EXCL, 0600);
if (_shmFd < 0)
{
throw new InvalidOperationException("Failed to create shared memory file");
}
shm_unlink(shmName);
if (ftruncate(_shmFd, _bufferSize) < 0)
{
close(_shmFd);
throw new InvalidOperationException("Failed to resize shared memory");
}
_pixelData = mmap(IntPtr.Zero, (nuint)_bufferSize, PROT_READ | PROT_WRITE, MAP_SHARED, _shmFd, 0);
if (_pixelData == IntPtr.Zero || _pixelData == new IntPtr(-1))
{
close(_shmFd);
throw new InvalidOperationException("Failed to mmap shared memory");
}
_shmPool = wl_shm_create_pool(_shm, _shmFd, _bufferSize);
if (_shmPool == IntPtr.Zero)
{
munmap(_pixelData, (nuint)_bufferSize);
close(_shmFd);
throw new InvalidOperationException("Failed to create wl_shm_pool");
}
_buffer = wl_shm_pool_create_buffer(_shmPool, 0, _width, _height, stride, WL_SHM_FORMAT_XRGB8888);
if (_buffer == IntPtr.Zero)
{
wl_shm_pool_destroy(_shmPool);
munmap(_pixelData, (nuint)_bufferSize);
close(_shmFd);
throw new InvalidOperationException("Failed to create wl_buffer");
}
// Create Skia bitmap backed by shared memory
var info = new SKImageInfo(_width, _height, SKColorType.Bgra8888, SKAlphaType.Opaque);
_bitmap = new SKBitmap();
_bitmap.InstallPixels(info, _pixelData, stride);
_canvas = new SKCanvas(_bitmap);
}
public void Show()
{
if (_surface == IntPtr.Zero || _buffer == IntPtr.Zero) return;
wl_surface_attach(_surface, _buffer, 0, 0);
wl_surface_damage(_surface, 0, 0, _width, _height);
wl_surface_commit(_surface);
wl_display_flush(_display);
}
public void Hide()
{
if (_surface == IntPtr.Zero) return;
wl_surface_attach(_surface, IntPtr.Zero, 0, 0);
wl_surface_commit(_surface);
wl_display_flush(_display);
}
public void SetTitle(string title)
{
_title = title;
}
public void Resize(int width, int height)
{
if (width == _width && height == _height) return;
_canvas?.Dispose();
_bitmap?.Dispose();
if (_buffer != IntPtr.Zero)
wl_buffer_destroy(_buffer);
if (_shmPool != IntPtr.Zero)
wl_shm_pool_destroy(_shmPool);
if (_pixelData != IntPtr.Zero)
munmap(_pixelData, (nuint)_bufferSize);
if (_shmFd >= 0)
close(_shmFd);
_width = width;
_height = height;
CreateShmBuffer();
Resized?.Invoke(this, (width, height));
}
public void ProcessEvents()
{
if (!_isRunning || _display == IntPtr.Zero) return;
wl_display_dispatch_pending(_display);
wl_display_flush(_display);
}
public void Stop()
{
_isRunning = false;
}
public SKCanvas? GetCanvas() => _canvas;
public void CommitFrame()
{
if (_surface != IntPtr.Zero && _buffer != IntPtr.Zero)
{
wl_surface_attach(_surface, _buffer, 0, 0);
wl_surface_damage(_surface, 0, 0, _width, _height);
wl_surface_commit(_surface);
wl_display_flush(_display);
}
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
_isRunning = false;
_canvas?.Dispose();
_bitmap?.Dispose();
if (_buffer != IntPtr.Zero)
{
wl_buffer_destroy(_buffer);
_buffer = IntPtr.Zero;
}
if (_shmPool != IntPtr.Zero)
{
wl_shm_pool_destroy(_shmPool);
_shmPool = IntPtr.Zero;
}
if (_pixelData != IntPtr.Zero && _pixelData != new IntPtr(-1))
{
munmap(_pixelData, (nuint)_bufferSize);
_pixelData = IntPtr.Zero;
}
if (_shmFd >= 0)
{
close(_shmFd);
_shmFd = -1;
}
if (_surface != IntPtr.Zero)
{
wl_surface_destroy(_surface);
_surface = IntPtr.Zero;
}
if (_display != IntPtr.Zero)
{
wl_display_disconnect(_display);
_display = IntPtr.Zero;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
using System.Text;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Provides drag and drop functionality using the X11 XDND protocol.
/// </summary>
public class DragDropService : IDisposable
{
private nint _display;
private nint _window;
private bool _isDragging;
private DragData? _currentDragData;
private nint _dragSource;
private nint _dragTarget;
private bool _disposed;
// XDND atoms
private nint _xdndAware;
private nint _xdndEnter;
private nint _xdndPosition;
private nint _xdndStatus;
private nint _xdndLeave;
private nint _xdndDrop;
private nint _xdndFinished;
private nint _xdndSelection;
private nint _xdndActionCopy;
private nint _xdndActionMove;
private nint _xdndActionLink;
private nint _xdndTypeList;
// Common MIME types
private nint _textPlain;
private nint _textUri;
private nint _applicationOctetStream;
/// <summary>
/// Gets whether a drag operation is in progress.
/// </summary>
public bool IsDragging => _isDragging;
/// <summary>
/// Event raised when a drag enters the window.
/// </summary>
public event EventHandler<DragEventArgs>? DragEnter;
/// <summary>
/// Event raised when dragging over the window.
/// </summary>
public event EventHandler<DragEventArgs>? DragOver;
/// <summary>
/// Event raised when a drag leaves the window.
/// </summary>
public event EventHandler? DragLeave;
/// <summary>
/// Event raised when a drop occurs.
/// </summary>
public event EventHandler<DropEventArgs>? Drop;
/// <summary>
/// Initializes the drag drop service for the specified window.
/// </summary>
public void Initialize(nint display, nint window)
{
_display = display;
_window = window;
InitializeAtoms();
SetXdndAware();
}
private void InitializeAtoms()
{
_xdndAware = XInternAtom(_display, "XdndAware", false);
_xdndEnter = XInternAtom(_display, "XdndEnter", false);
_xdndPosition = XInternAtom(_display, "XdndPosition", false);
_xdndStatus = XInternAtom(_display, "XdndStatus", false);
_xdndLeave = XInternAtom(_display, "XdndLeave", false);
_xdndDrop = XInternAtom(_display, "XdndDrop", false);
_xdndFinished = XInternAtom(_display, "XdndFinished", false);
_xdndSelection = XInternAtom(_display, "XdndSelection", false);
_xdndActionCopy = XInternAtom(_display, "XdndActionCopy", false);
_xdndActionMove = XInternAtom(_display, "XdndActionMove", false);
_xdndActionLink = XInternAtom(_display, "XdndActionLink", false);
_xdndTypeList = XInternAtom(_display, "XdndTypeList", false);
_textPlain = XInternAtom(_display, "text/plain", false);
_textUri = XInternAtom(_display, "text/uri-list", false);
_applicationOctetStream = XInternAtom(_display, "application/octet-stream", false);
}
private void SetXdndAware()
{
// Set XdndAware property to indicate we support XDND version 5
int version = 5;
XChangeProperty(_display, _window, _xdndAware, XA_ATOM, 32,
PropModeReplace, ref version, 1);
}
/// <summary>
/// Processes an X11 client message for drag and drop.
/// </summary>
public bool ProcessClientMessage(nint messageType, nint[] data)
{
if (messageType == _xdndEnter)
{
return HandleXdndEnter(data);
}
else if (messageType == _xdndPosition)
{
return HandleXdndPosition(data);
}
else if (messageType == _xdndLeave)
{
return HandleXdndLeave(data);
}
else if (messageType == _xdndDrop)
{
return HandleXdndDrop(data);
}
return false;
}
private bool HandleXdndEnter(nint[] data)
{
_dragSource = data[0];
int version = (int)((data[1] >> 24) & 0xFF);
bool hasTypeList = (data[1] & 1) != 0;
var types = new List<nint>();
if (hasTypeList)
{
// Get types from XdndTypeList property
types = GetTypeList(_dragSource);
}
else
{
// Types are in the message
for (int i = 2; i < 5; i++)
{
if (data[i] != IntPtr.Zero)
{
types.Add(data[i]);
}
}
}
_currentDragData = new DragData
{
SourceWindow = _dragSource,
SupportedTypes = types.ToArray()
};
DragEnter?.Invoke(this, new DragEventArgs(_currentDragData, 0, 0));
return true;
}
private bool HandleXdndPosition(nint[] data)
{
if (_currentDragData == null) return false;
int x = (int)((data[2] >> 16) & 0xFFFF);
int y = (int)(data[2] & 0xFFFF);
nint action = data[4];
var eventArgs = new DragEventArgs(_currentDragData, x, y)
{
AllowedAction = GetDragAction(action)
};
DragOver?.Invoke(this, eventArgs);
// Send XdndStatus reply
SendXdndStatus(eventArgs.Accepted, eventArgs.AcceptedAction);
return true;
}
private bool HandleXdndLeave(nint[] data)
{
_currentDragData = null;
_dragSource = IntPtr.Zero;
DragLeave?.Invoke(this, EventArgs.Empty);
return true;
}
private bool HandleXdndDrop(nint[] data)
{
if (_currentDragData == null) return false;
uint timestamp = (uint)data[2];
// Request the data
string? droppedData = RequestDropData(timestamp);
var eventArgs = new DropEventArgs(_currentDragData, droppedData);
Drop?.Invoke(this, eventArgs);
// Send XdndFinished
SendXdndFinished(eventArgs.Handled);
_currentDragData = null;
_dragSource = IntPtr.Zero;
return true;
}
private List<nint> GetTypeList(nint window)
{
var types = new List<nint>();
nint actualType;
int actualFormat;
nint nitems, bytesAfter;
nint data;
int result = XGetWindowProperty(_display, window, _xdndTypeList, 0, 1024, false,
XA_ATOM, out actualType, out actualFormat, out nitems, out bytesAfter, out data);
if (result == 0 && data != IntPtr.Zero)
{
for (int i = 0; i < (int)nitems; i++)
{
nint atom = Marshal.ReadIntPtr(data, i * IntPtr.Size);
types.Add(atom);
}
XFree(data);
}
return types;
}
private void SendXdndStatus(bool accepted, DragAction action)
{
var ev = new XClientMessageEvent
{
type = ClientMessage,
window = _dragSource,
message_type = _xdndStatus,
format = 32
};
ev.data0 = _window;
ev.data1 = accepted ? 1 : 0;
ev.data2 = 0; // x, y of rectangle
ev.data3 = 0; // width, height of rectangle
ev.data4 = GetActionAtom(action);
XSendEvent(_display, _dragSource, false, 0, ref ev);
XFlush(_display);
}
private void SendXdndFinished(bool accepted)
{
var ev = new XClientMessageEvent
{
type = ClientMessage,
window = _dragSource,
message_type = _xdndFinished,
format = 32
};
ev.data0 = _window;
ev.data1 = accepted ? 1 : 0;
ev.data2 = accepted ? _xdndActionCopy : IntPtr.Zero;
XSendEvent(_display, _dragSource, false, 0, ref ev);
XFlush(_display);
}
private string? RequestDropData(uint timestamp)
{
// Convert selection to get the data
nint targetType = _textPlain;
// Check if text/uri-list is available
if (_currentDragData != null)
{
foreach (var type in _currentDragData.SupportedTypes)
{
if (type == _textUri)
{
targetType = _textUri;
break;
}
}
}
// Request selection conversion
XConvertSelection(_display, _xdndSelection, targetType, _xdndSelection, _window, timestamp);
XFlush(_display);
// In a real implementation, we would wait for SelectionNotify event
// and then get the data. For simplicity, we return null here.
// The actual data retrieval requires an event loop integration.
return null;
}
private DragAction GetDragAction(nint atom)
{
if (atom == _xdndActionCopy) return DragAction.Copy;
if (atom == _xdndActionMove) return DragAction.Move;
if (atom == _xdndActionLink) return DragAction.Link;
return DragAction.None;
}
private nint GetActionAtom(DragAction action)
{
return action switch
{
DragAction.Copy => _xdndActionCopy,
DragAction.Move => _xdndActionMove,
DragAction.Link => _xdndActionLink,
_ => IntPtr.Zero
};
}
/// <summary>
/// Starts a drag operation.
/// </summary>
public void StartDrag(DragData data)
{
if (_isDragging) return;
_isDragging = true;
_currentDragData = data;
// Set the drag cursor and initiate the drag
// This requires integration with the X11 event loop
}
/// <summary>
/// Cancels the current drag operation.
/// </summary>
public void CancelDrag()
{
_isDragging = false;
_currentDragData = null;
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
}
#region X11 Interop
private const int ClientMessage = 33;
private const int PropModeReplace = 0;
private static readonly nint XA_ATOM = (nint)4;
[StructLayout(LayoutKind.Sequential)]
private struct XClientMessageEvent
{
public int type;
public ulong serial;
public bool send_event;
public nint display;
public nint window;
public nint message_type;
public int format;
public nint data0;
public nint data1;
public nint data2;
public nint data3;
public nint data4;
}
[DllImport("libX11.so.6")]
private static extern nint XInternAtom(nint display, string atomName, bool onlyIfExists);
[DllImport("libX11.so.6")]
private static extern int XChangeProperty(nint display, nint window, nint property, nint type,
int format, int mode, ref int data, int nelements);
[DllImport("libX11.so.6")]
private static extern int XGetWindowProperty(nint display, nint window, nint property,
long offset, long length, bool delete, nint reqType,
out nint actualType, out int actualFormat, out nint nitems, out nint bytesAfter, out nint data);
[DllImport("libX11.so.6")]
private static extern int XSendEvent(nint display, nint window, bool propagate, long eventMask, ref XClientMessageEvent xevent);
[DllImport("libX11.so.6")]
private static extern int XConvertSelection(nint display, nint selection, nint target, nint property, nint requestor, uint time);
[DllImport("libX11.so.6")]
private static extern void XFree(nint ptr);
[DllImport("libX11.so.6")]
private static extern void XFlush(nint display);
#endregion
}
/// <summary>
/// Contains data for a drag operation.
/// </summary>
public class DragData
{
/// <summary>
/// Gets or sets the source window.
/// </summary>
public nint SourceWindow { get; set; }
/// <summary>
/// Gets or sets the supported MIME types.
/// </summary>
public nint[] SupportedTypes { get; set; } = Array.Empty<nint>();
/// <summary>
/// Gets or sets the text data.
/// </summary>
public string? Text { get; set; }
/// <summary>
/// Gets or sets the file paths.
/// </summary>
public string[]? FilePaths { get; set; }
/// <summary>
/// Gets or sets custom data.
/// </summary>
public object? Data { get; set; }
}
/// <summary>
/// Event args for drag events.
/// </summary>
public class DragEventArgs : EventArgs
{
/// <summary>
/// Gets the drag data.
/// </summary>
public DragData Data { get; }
/// <summary>
/// Gets the X coordinate.
/// </summary>
public int X { get; }
/// <summary>
/// Gets the Y coordinate.
/// </summary>
public int Y { get; }
/// <summary>
/// Gets or sets whether the drop is accepted.
/// </summary>
public bool Accepted { get; set; }
/// <summary>
/// Gets or sets the allowed action.
/// </summary>
public DragAction AllowedAction { get; set; }
/// <summary>
/// Gets or sets the accepted action.
/// </summary>
public DragAction AcceptedAction { get; set; } = DragAction.Copy;
public DragEventArgs(DragData data, int x, int y)
{
Data = data;
X = x;
Y = y;
}
}
/// <summary>
/// Event args for drop events.
/// </summary>
public class DropEventArgs : EventArgs
{
/// <summary>
/// Gets the drag data.
/// </summary>
public DragData Data { get; }
/// <summary>
/// Gets the dropped data as string.
/// </summary>
public string? DroppedData { get; }
/// <summary>
/// Gets or sets whether the drop was handled.
/// </summary>
public bool Handled { get; set; }
public DropEventArgs(DragData data, string? droppedData)
{
Data = data;
DroppedData = droppedData;
}
}
/// <summary>
/// Drag action types.
/// </summary>
public enum DragAction
{
None,
Copy,
Move,
Link
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using System.Text;
using Microsoft.Maui.ApplicationModel.Communication;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux email implementation using mailto: URI.
/// </summary>
public class EmailService : IEmail
{
public bool IsComposeSupported => true;
public async Task ComposeAsync()
{
await ComposeAsync(new EmailMessage());
}
public async Task ComposeAsync(string subject, string body, params string[] to)
{
var message = new EmailMessage
{
Subject = subject,
Body = body
};
if (to != null && to.Length > 0)
{
message.To = new List<string>(to);
}
await ComposeAsync(message);
}
public async Task ComposeAsync(EmailMessage? message)
{
if (message == null)
throw new ArgumentNullException(nameof(message));
var mailto = BuildMailtoUri(message);
try
{
var startInfo = new ProcessStartInfo
{
FileName = "xdg-open",
Arguments = $"\"{mailto}\"",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
await process.WaitForExitAsync();
}
}
catch (Exception ex)
{
throw new InvalidOperationException("Failed to open email client", ex);
}
}
private static string BuildMailtoUri(EmailMessage? message)
{
var sb = new StringBuilder("mailto:");
// Add recipients
if (message.To?.Count > 0)
{
sb.Append(string.Join(",", message.To.Select(Uri.EscapeDataString)));
}
var queryParams = new List<string>();
// Add subject
if (!string.IsNullOrEmpty(message.Subject))
{
queryParams.Add($"subject={Uri.EscapeDataString(message.Subject)}");
}
// Add body
if (!string.IsNullOrEmpty(message.Body))
{
queryParams.Add($"body={Uri.EscapeDataString(message.Body)}");
}
// Add CC
if (message.Cc?.Count > 0)
{
queryParams.Add($"cc={string.Join(",", message.Cc.Select(Uri.EscapeDataString))}");
}
// Add BCC
if (message.Bcc?.Count > 0)
{
queryParams.Add($"bcc={string.Join(",", message.Bcc.Select(Uri.EscapeDataString))}");
}
if (queryParams.Count > 0)
{
sb.Append('?');
sb.Append(string.Join("&", queryParams));
}
return sb.ToString();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using System.Text;
using Microsoft.Maui.Storage;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux file picker implementation using zenity or kdialog.
/// </summary>
public class FilePickerService : IFilePicker
{
private enum DialogTool
{
None,
Zenity,
Kdialog
}
private static DialogTool? _availableTool;
private static DialogTool GetAvailableTool()
{
if (_availableTool.HasValue)
return _availableTool.Value;
// Check for zenity first (GNOME/GTK)
if (IsToolAvailable("zenity"))
{
_availableTool = DialogTool.Zenity;
return DialogTool.Zenity;
}
// Check for kdialog (KDE)
if (IsToolAvailable("kdialog"))
{
_availableTool = DialogTool.Kdialog;
return DialogTool.Kdialog;
}
_availableTool = DialogTool.None;
return DialogTool.None;
}
private static bool IsToolAvailable(string tool)
{
try
{
var psi = new ProcessStartInfo
{
FileName = "which",
Arguments = tool,
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = true
};
using var process = Process.Start(psi);
process?.WaitForExit(1000);
return process?.ExitCode == 0;
}
catch
{
return false;
}
}
public Task<FileResult?> PickAsync(PickOptions? options = null)
{
return PickInternalAsync(options, false);
}
public Task<IEnumerable<FileResult>> PickMultipleAsync(PickOptions? options = null)
{
return PickMultipleInternalAsync(options);
}
private async Task<FileResult?> PickInternalAsync(PickOptions? options, bool multiple)
{
var results = await PickMultipleInternalAsync(options, multiple);
return results.FirstOrDefault();
}
private Task<IEnumerable<FileResult>> PickMultipleInternalAsync(PickOptions? options, bool multiple = true)
{
return Task.Run<IEnumerable<FileResult>>(() =>
{
var tool = GetAvailableTool();
if (tool == DialogTool.None)
{
// Fall back to console path input
Console.WriteLine("No file dialog available. Please enter file path:");
var path = Console.ReadLine();
if (!string.IsNullOrEmpty(path) && File.Exists(path))
{
return new[] { new LinuxFileResult(path) };
}
return Array.Empty<FileResult>();
}
string arguments;
if (tool == DialogTool.Zenity)
{
arguments = BuildZenityArguments(options, multiple);
}
else
{
arguments = BuildKdialogArguments(options, multiple);
}
var psi = new ProcessStartInfo
{
FileName = tool == DialogTool.Zenity ? "zenity" : "kdialog",
Arguments = arguments,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
try
{
using var process = Process.Start(psi);
if (process == null)
return Array.Empty<FileResult>();
var output = process.StandardOutput.ReadToEnd().Trim();
process.WaitForExit();
if (process.ExitCode != 0 || string.IsNullOrEmpty(output))
return Array.Empty<FileResult>();
// Parse output (paths separated by | for zenity, newlines for kdialog)
var separator = tool == DialogTool.Zenity ? '|' : '\n';
var paths = output.Split(separator, StringSplitOptions.RemoveEmptyEntries);
return paths
.Where(File.Exists)
.Select(p => (FileResult)new LinuxFileResult(p))
.ToArray();
}
catch
{
return Array.Empty<FileResult>();
}
});
}
private string BuildZenityArguments(PickOptions? options, bool multiple)
{
var sb = new StringBuilder("--file-selection");
if (multiple)
sb.Append(" --multiple --separator='|'");
if (!string.IsNullOrEmpty(options?.PickerTitle))
sb.Append($" --title=\"{EscapeArgument(options.PickerTitle)}\"");
if (options?.FileTypes != null)
{
foreach (var ext in options.FileTypes.Value)
{
var extension = ext.StartsWith(".") ? ext : $".{ext}";
sb.Append($" --file-filter='*{extension}'");
}
}
return sb.ToString();
}
private string BuildKdialogArguments(PickOptions? options, bool multiple)
{
var sb = new StringBuilder("--getopenfilename");
if (multiple)
sb.Insert(0, "--multiple ");
sb.Append(" .");
if (options?.FileTypes != null)
{
var extensions = string.Join(" ", options.FileTypes.Value.Select(e =>
e.StartsWith(".") ? $"*{e}" : $"*.{e}"));
if (!string.IsNullOrEmpty(extensions))
{
sb.Append($" \"{extensions}\"");
}
}
if (!string.IsNullOrEmpty(options?.PickerTitle))
sb.Append($" --title \"{EscapeArgument(options.PickerTitle)}\"");
return sb.ToString();
}
private static string EscapeArgument(string arg)
{
return arg.Replace("\"", "\\\"").Replace("'", "\\'");
}
}
/// <summary>
/// Linux-specific FileResult implementation.
/// </summary>
internal class LinuxFileResult : FileResult
{
public LinuxFileResult(string fullPath) : base(fullPath)
{
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux folder picker utility using zenity or kdialog.
/// This is a standalone service as MAUI core does not define IFolderPicker.
/// </summary>
public class FolderPickerService
{
public async Task<string?> PickFolderAsync(string? initialDirectory = null, CancellationToken cancellationToken = default)
{
try
{
// Try zenity first (GNOME)
var result = await TryZenityFolderPicker(initialDirectory, cancellationToken);
if (result != null)
{
return result;
}
// Fall back to kdialog (KDE)
result = await TryKdialogFolderPicker(initialDirectory, cancellationToken);
if (result != null)
{
return result;
}
return null;
}
catch (OperationCanceledException)
{
return null;
}
catch
{
return null;
}
}
private async Task<string?> TryZenityFolderPicker(string? initialDirectory, CancellationToken cancellationToken)
{
try
{
var args = "--file-selection --directory";
if (!string.IsNullOrEmpty(initialDirectory) && Directory.Exists(initialDirectory))
{
args += $" --filename=\"{initialDirectory}/\"";
}
var startInfo = new ProcessStartInfo
{
FileName = "zenity",
Arguments = args,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return null;
var output = await process.StandardOutput.ReadToEndAsync(cancellationToken);
await process.WaitForExitAsync(cancellationToken);
if (process.ExitCode == 0 && !string.IsNullOrWhiteSpace(output))
{
var path = output.Trim();
if (Directory.Exists(path))
{
return path;
}
}
return null;
}
catch
{
return null;
}
}
private async Task<string?> TryKdialogFolderPicker(string? initialDirectory, CancellationToken cancellationToken)
{
try
{
var args = "--getexistingdirectory";
if (!string.IsNullOrEmpty(initialDirectory) && Directory.Exists(initialDirectory))
{
args += $" \"{initialDirectory}\"";
}
var startInfo = new ProcessStartInfo
{
FileName = "kdialog",
Arguments = args,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return null;
var output = await process.StandardOutput.ReadToEndAsync(cancellationToken);
await process.WaitForExitAsync(cancellationToken);
if (process.ExitCode == 0 && !string.IsNullOrWhiteSpace(output))
{
var path = output.Trim();
if (Directory.Exists(path))
{
return path;
}
}
return null;
}
catch
{
return null;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Concurrent;
using System.Runtime.InteropServices;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Provides global hotkey registration and handling using X11.
/// </summary>
public class GlobalHotkeyService : IDisposable
{
private nint _display;
private nint _rootWindow;
private readonly ConcurrentDictionary<int, HotkeyRegistration> _registrations = new();
private int _nextId = 1;
private bool _disposed;
private Thread? _eventThread;
private bool _isListening;
/// <summary>
/// Event raised when a registered hotkey is pressed.
/// </summary>
public event EventHandler<HotkeyEventArgs>? HotkeyPressed;
/// <summary>
/// Initializes the global hotkey service.
/// </summary>
public void Initialize()
{
_display = XOpenDisplay(IntPtr.Zero);
if (_display == IntPtr.Zero)
{
throw new InvalidOperationException("Failed to open X display");
}
_rootWindow = XDefaultRootWindow(_display);
// Start listening for hotkeys in background
_isListening = true;
_eventThread = new Thread(ListenForHotkeys)
{
IsBackground = true,
Name = "GlobalHotkeyListener"
};
_eventThread.Start();
}
/// <summary>
/// Registers a global hotkey.
/// </summary>
/// <param name="key">The key code.</param>
/// <param name="modifiers">The modifier keys.</param>
/// <returns>A registration ID that can be used to unregister.</returns>
public int Register(HotkeyKey key, HotkeyModifiers modifiers)
{
if (_display == IntPtr.Zero)
{
throw new InvalidOperationException("Service not initialized");
}
int keyCode = XKeysymToKeycode(_display, (nint)key);
if (keyCode == 0)
{
throw new ArgumentException($"Invalid key: {key}");
}
uint modifierMask = GetModifierMask(modifiers);
// Register for all modifier combinations (with/without NumLock, CapsLock)
uint[] masks = GetModifierCombinations(modifierMask);
foreach (var mask in masks)
{
int result = XGrabKey(_display, keyCode, mask, _rootWindow, true, GrabModeAsync, GrabModeAsync);
if (result == 0)
{
Console.WriteLine($"Failed to grab key {key} with modifiers {modifiers}");
}
}
int id = _nextId++;
_registrations[id] = new HotkeyRegistration
{
Id = id,
KeyCode = keyCode,
Modifiers = modifierMask,
Key = key,
ModifierKeys = modifiers
};
XFlush(_display);
return id;
}
/// <summary>
/// Unregisters a global hotkey.
/// </summary>
/// <param name="id">The registration ID.</param>
public void Unregister(int id)
{
if (_registrations.TryRemove(id, out var registration))
{
uint[] masks = GetModifierCombinations(registration.Modifiers);
foreach (var mask in masks)
{
XUngrabKey(_display, registration.KeyCode, mask, _rootWindow);
}
XFlush(_display);
}
}
/// <summary>
/// Unregisters all global hotkeys.
/// </summary>
public void UnregisterAll()
{
foreach (var id in _registrations.Keys.ToList())
{
Unregister(id);
}
}
private void ListenForHotkeys()
{
while (_isListening && _display != IntPtr.Zero)
{
try
{
if (XPending(_display) > 0)
{
var xevent = new XEvent();
XNextEvent(_display, ref xevent);
if (xevent.type == KeyPress)
{
var keyEvent = xevent.KeyEvent;
ProcessKeyEvent(keyEvent.keycode, keyEvent.state);
}
}
else
{
Thread.Sleep(10);
}
}
catch (Exception ex)
{
Console.WriteLine($"GlobalHotkeyService error: {ex.Message}");
}
}
}
private void ProcessKeyEvent(int keyCode, uint state)
{
// Remove NumLock and CapsLock from state for comparison
uint cleanState = state & ~(NumLockMask | CapsLockMask | ScrollLockMask);
foreach (var registration in _registrations.Values)
{
if (registration.KeyCode == keyCode &&
(registration.Modifiers == cleanState ||
registration.Modifiers == (cleanState & ~Mod2Mask))) // Mod2 is often NumLock
{
OnHotkeyPressed(registration);
break;
}
}
}
private void OnHotkeyPressed(HotkeyRegistration registration)
{
HotkeyPressed?.Invoke(this, new HotkeyEventArgs(
registration.Id,
registration.Key,
registration.ModifierKeys));
}
private uint GetModifierMask(HotkeyModifiers modifiers)
{
uint mask = 0;
if (modifiers.HasFlag(HotkeyModifiers.Shift)) mask |= ShiftMask;
if (modifiers.HasFlag(HotkeyModifiers.Control)) mask |= ControlMask;
if (modifiers.HasFlag(HotkeyModifiers.Alt)) mask |= Mod1Mask;
if (modifiers.HasFlag(HotkeyModifiers.Super)) mask |= Mod4Mask;
return mask;
}
private uint[] GetModifierCombinations(uint baseMask)
{
// Include combinations with NumLock and CapsLock
return new uint[]
{
baseMask,
baseMask | NumLockMask,
baseMask | CapsLockMask,
baseMask | NumLockMask | CapsLockMask
};
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
_isListening = false;
UnregisterAll();
if (_display != IntPtr.Zero)
{
XCloseDisplay(_display);
_display = IntPtr.Zero;
}
}
#region X11 Interop
private const int KeyPress = 2;
private const int GrabModeAsync = 1;
private const uint ShiftMask = 1 << 0;
private const uint LockMask = 1 << 1; // CapsLock
private const uint ControlMask = 1 << 2;
private const uint Mod1Mask = 1 << 3; // Alt
private const uint Mod2Mask = 1 << 4; // NumLock
private const uint Mod4Mask = 1 << 6; // Super
private const uint NumLockMask = Mod2Mask;
private const uint CapsLockMask = LockMask;
private const uint ScrollLockMask = 0; // Usually not used
[StructLayout(LayoutKind.Explicit)]
private struct XEvent
{
[FieldOffset(0)] public int type;
[FieldOffset(0)] public XKeyEvent KeyEvent;
}
[StructLayout(LayoutKind.Sequential)]
private struct XKeyEvent
{
public int type;
public ulong serial;
public bool send_event;
public nint display;
public nint window;
public nint root;
public nint subwindow;
public ulong time;
public int x, y;
public int x_root, y_root;
public uint state;
public int keycode;
public bool same_screen;
}
[DllImport("libX11.so.6")]
private static extern nint XOpenDisplay(nint display);
[DllImport("libX11.so.6")]
private static extern void XCloseDisplay(nint display);
[DllImport("libX11.so.6")]
private static extern nint XDefaultRootWindow(nint display);
[DllImport("libX11.so.6")]
private static extern int XKeysymToKeycode(nint display, nint keysym);
[DllImport("libX11.so.6")]
private static extern int XGrabKey(nint display, int keycode, uint modifiers, nint grabWindow,
bool ownerEvents, int pointerMode, int keyboardMode);
[DllImport("libX11.so.6")]
private static extern int XUngrabKey(nint display, int keycode, uint modifiers, nint grabWindow);
[DllImport("libX11.so.6")]
private static extern int XPending(nint display);
[DllImport("libX11.so.6")]
private static extern int XNextEvent(nint display, ref XEvent xevent);
[DllImport("libX11.so.6")]
private static extern void XFlush(nint display);
#endregion
private class HotkeyRegistration
{
public int Id { get; set; }
public int KeyCode { get; set; }
public uint Modifiers { get; set; }
public HotkeyKey Key { get; set; }
public HotkeyModifiers ModifierKeys { get; set; }
}
}
/// <summary>
/// Event args for hotkey pressed events.
/// </summary>
public class HotkeyEventArgs : EventArgs
{
/// <summary>
/// Gets the registration ID.
/// </summary>
public int Id { get; }
/// <summary>
/// Gets the key.
/// </summary>
public HotkeyKey Key { get; }
/// <summary>
/// Gets the modifier keys.
/// </summary>
public HotkeyModifiers Modifiers { get; }
public HotkeyEventArgs(int id, HotkeyKey key, HotkeyModifiers modifiers)
{
Id = id;
Key = key;
Modifiers = modifiers;
}
}
/// <summary>
/// Hotkey modifier keys.
/// </summary>
[Flags]
public enum HotkeyModifiers
{
None = 0,
Shift = 1 << 0,
Control = 1 << 1,
Alt = 1 << 2,
Super = 1 << 3
}
/// <summary>
/// Hotkey keys (X11 keysyms).
/// </summary>
public enum HotkeyKey : uint
{
// Letters
A = 0x61, B = 0x62, C = 0x63, D = 0x64, E = 0x65,
F = 0x66, G = 0x67, H = 0x68, I = 0x69, J = 0x6A,
K = 0x6B, L = 0x6C, M = 0x6D, N = 0x6E, O = 0x6F,
P = 0x70, Q = 0x71, R = 0x72, S = 0x73, T = 0x74,
U = 0x75, V = 0x76, W = 0x77, X = 0x78, Y = 0x79,
Z = 0x7A,
// Numbers
D0 = 0x30, D1 = 0x31, D2 = 0x32, D3 = 0x33, D4 = 0x34,
D5 = 0x35, D6 = 0x36, D7 = 0x37, D8 = 0x38, D9 = 0x39,
// Function keys
F1 = 0xFFBE, F2 = 0xFFBF, F3 = 0xFFC0, F4 = 0xFFC1,
F5 = 0xFFC2, F6 = 0xFFC3, F7 = 0xFFC4, F8 = 0xFFC5,
F9 = 0xFFC6, F10 = 0xFFC7, F11 = 0xFFC8, F12 = 0xFFC9,
// Special keys
Escape = 0xFF1B,
Tab = 0xFF09,
Return = 0xFF0D,
Space = 0x20,
BackSpace = 0xFF08,
Delete = 0xFFFF,
Insert = 0xFF63,
Home = 0xFF50,
End = 0xFF57,
PageUp = 0xFF55,
PageDown = 0xFF56,
// Arrow keys
Left = 0xFF51,
Up = 0xFF52,
Right = 0xFF53,
Down = 0xFF54,
// Media keys
AudioPlay = 0x1008FF14,
AudioStop = 0x1008FF15,
AudioPrev = 0x1008FF16,
AudioNext = 0x1008FF17,
AudioMute = 0x1008FF12,
AudioRaiseVolume = 0x1008FF13,
AudioLowerVolume = 0x1008FF11,
// Print screen
Print = 0xFF61
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Provides HiDPI and display scaling detection for Linux.
/// </summary>
public class HiDpiService
{
private const float DefaultDpi = 96f;
private float _scaleFactor = 1.0f;
private float _dpi = DefaultDpi;
private bool _initialized;
/// <summary>
/// Gets the current scale factor.
/// </summary>
public float ScaleFactor => _scaleFactor;
/// <summary>
/// Gets the current DPI.
/// </summary>
public float Dpi => _dpi;
/// <summary>
/// Event raised when scale factor changes.
/// </summary>
public event EventHandler<ScaleChangedEventArgs>? ScaleChanged;
/// <summary>
/// Initializes the HiDPI detection service.
/// </summary>
public void Initialize()
{
if (_initialized) return;
_initialized = true;
DetectScaleFactor();
}
/// <summary>
/// Detects the current scale factor using multiple methods.
/// </summary>
public void DetectScaleFactor()
{
float scale = 1.0f;
float dpi = DefaultDpi;
// Try multiple detection methods in order of preference
if (TryGetEnvironmentScale(out float envScale))
{
scale = envScale;
}
else if (TryGetGnomeScale(out float gnomeScale, out float gnomeDpi))
{
scale = gnomeScale;
dpi = gnomeDpi;
}
else if (TryGetKdeScale(out float kdeScale))
{
scale = kdeScale;
}
else if (TryGetX11Scale(out float x11Scale, out float x11Dpi))
{
scale = x11Scale;
dpi = x11Dpi;
}
else if (TryGetXrandrScale(out float xrandrScale))
{
scale = xrandrScale;
}
UpdateScale(scale, dpi);
}
private void UpdateScale(float scale, float dpi)
{
if (Math.Abs(_scaleFactor - scale) > 0.01f || Math.Abs(_dpi - dpi) > 0.01f)
{
var oldScale = _scaleFactor;
_scaleFactor = scale;
_dpi = dpi;
ScaleChanged?.Invoke(this, new ScaleChangedEventArgs(oldScale, scale, dpi));
}
}
/// <summary>
/// Gets scale from environment variables.
/// </summary>
private static bool TryGetEnvironmentScale(out float scale)
{
scale = 1.0f;
// GDK_SCALE (GTK3/4)
var gdkScale = Environment.GetEnvironmentVariable("GDK_SCALE");
if (!string.IsNullOrEmpty(gdkScale) && float.TryParse(gdkScale, out float gdk))
{
scale = gdk;
return true;
}
// GDK_DPI_SCALE (GTK3/4)
var gdkDpiScale = Environment.GetEnvironmentVariable("GDK_DPI_SCALE");
if (!string.IsNullOrEmpty(gdkDpiScale) && float.TryParse(gdkDpiScale, out float gdkDpi))
{
scale = gdkDpi;
return true;
}
// QT_SCALE_FACTOR
var qtScale = Environment.GetEnvironmentVariable("QT_SCALE_FACTOR");
if (!string.IsNullOrEmpty(qtScale) && float.TryParse(qtScale, out float qt))
{
scale = qt;
return true;
}
// QT_SCREEN_SCALE_FACTORS (can be per-screen)
var qtScreenScales = Environment.GetEnvironmentVariable("QT_SCREEN_SCALE_FACTORS");
if (!string.IsNullOrEmpty(qtScreenScales))
{
// Format: "screen1=1.5;screen2=2.0" or just "1.5"
var first = qtScreenScales.Split(';')[0];
if (first.Contains('='))
{
first = first.Split('=')[1];
}
if (float.TryParse(first, out float qtScreen))
{
scale = qtScreen;
return true;
}
}
return false;
}
/// <summary>
/// Gets scale from GNOME settings.
/// </summary>
private static bool TryGetGnomeScale(out float scale, out float dpi)
{
scale = 1.0f;
dpi = DefaultDpi;
try
{
// Try gsettings for GNOME
var result = RunCommand("gsettings", "get org.gnome.desktop.interface scaling-factor");
if (!string.IsNullOrEmpty(result))
{
var match = Regex.Match(result, @"uint32\s+(\d+)");
if (match.Success && int.TryParse(match.Groups[1].Value, out int gnomeScale))
{
if (gnomeScale > 0)
{
scale = gnomeScale;
}
}
}
// Also check text-scaling-factor for fractional scaling
result = RunCommand("gsettings", "get org.gnome.desktop.interface text-scaling-factor");
if (!string.IsNullOrEmpty(result) && float.TryParse(result.Trim(), out float textScale))
{
if (textScale > 0.5f)
{
scale = Math.Max(scale, textScale);
}
}
// Check for GNOME 40+ experimental fractional scaling
result = RunCommand("gsettings", "get org.gnome.mutter experimental-features");
if (result != null && result.Contains("scale-monitor-framebuffer"))
{
// Fractional scaling is enabled, try to get actual scale
result = RunCommand("gdbus", "call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetCurrentState");
if (result != null)
{
// Parse for scale value
var scaleMatch = Regex.Match(result, @"'scale':\s*<(\d+\.?\d*)>");
if (scaleMatch.Success && float.TryParse(scaleMatch.Groups[1].Value, out float mutterScale))
{
scale = mutterScale;
}
}
}
return scale > 1.0f || Math.Abs(scale - 1.0f) < 0.01f;
}
catch
{
return false;
}
}
/// <summary>
/// Gets scale from KDE settings.
/// </summary>
private static bool TryGetKdeScale(out float scale)
{
scale = 1.0f;
try
{
// Try kreadconfig5 for KDE Plasma 5
var result = RunCommand("kreadconfig5", "--file kdeglobals --group KScreen --key ScaleFactor");
if (!string.IsNullOrEmpty(result) && float.TryParse(result.Trim(), out float kdeScale))
{
if (kdeScale > 0)
{
scale = kdeScale;
return true;
}
}
// Try KDE Plasma 6
result = RunCommand("kreadconfig6", "--file kdeglobals --group KScreen --key ScaleFactor");
if (!string.IsNullOrEmpty(result) && float.TryParse(result.Trim(), out float kde6Scale))
{
if (kde6Scale > 0)
{
scale = kde6Scale;
return true;
}
}
// Check kdeglobals config file directly
var configPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
".config", "kdeglobals");
if (File.Exists(configPath))
{
var lines = File.ReadAllLines(configPath);
bool inKScreenSection = false;
foreach (var line in lines)
{
if (line.Trim() == "[KScreen]")
{
inKScreenSection = true;
continue;
}
if (inKScreenSection && line.StartsWith("["))
{
break;
}
if (inKScreenSection && line.StartsWith("ScaleFactor="))
{
var value = line.Substring("ScaleFactor=".Length);
if (float.TryParse(value, out float fileScale))
{
scale = fileScale;
return true;
}
}
}
}
return false;
}
catch
{
return false;
}
}
/// <summary>
/// Gets scale from X11 Xresources.
/// </summary>
private bool TryGetX11Scale(out float scale, out float dpi)
{
scale = 1.0f;
dpi = DefaultDpi;
try
{
// Try xrdb query
var result = RunCommand("xrdb", "-query");
if (!string.IsNullOrEmpty(result))
{
// Look for Xft.dpi
var match = Regex.Match(result, @"Xft\.dpi:\s*(\d+)");
if (match.Success && float.TryParse(match.Groups[1].Value, out float xftDpi))
{
dpi = xftDpi;
scale = xftDpi / DefaultDpi;
return true;
}
}
// Try reading .Xresources directly
var xresourcesPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
".Xresources");
if (File.Exists(xresourcesPath))
{
var content = File.ReadAllText(xresourcesPath);
var match = Regex.Match(content, @"Xft\.dpi:\s*(\d+)");
if (match.Success && float.TryParse(match.Groups[1].Value, out float fileDpi))
{
dpi = fileDpi;
scale = fileDpi / DefaultDpi;
return true;
}
}
// Try X11 directly
return TryGetX11DpiDirect(out scale, out dpi);
}
catch
{
return false;
}
}
/// <summary>
/// Gets DPI directly from X11 server.
/// </summary>
private bool TryGetX11DpiDirect(out float scale, out float dpi)
{
scale = 1.0f;
dpi = DefaultDpi;
try
{
var display = XOpenDisplay(IntPtr.Zero);
if (display == IntPtr.Zero) return false;
try
{
int screen = XDefaultScreen(display);
// Get physical dimensions
int widthMm = XDisplayWidthMM(display, screen);
int heightMm = XDisplayHeightMM(display, screen);
int widthPx = XDisplayWidth(display, screen);
int heightPx = XDisplayHeight(display, screen);
if (widthMm > 0 && heightMm > 0)
{
float dpiX = widthPx * 25.4f / widthMm;
float dpiY = heightPx * 25.4f / heightMm;
dpi = (dpiX + dpiY) / 2;
scale = dpi / DefaultDpi;
return true;
}
return false;
}
finally
{
XCloseDisplay(display);
}
}
catch
{
return false;
}
}
/// <summary>
/// Gets scale from xrandr output.
/// </summary>
private static bool TryGetXrandrScale(out float scale)
{
scale = 1.0f;
try
{
var result = RunCommand("xrandr", "--query");
if (string.IsNullOrEmpty(result)) return false;
// Look for connected displays with scaling
// Format: "eDP-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 309mm x 174mm"
var lines = result.Split('\n');
foreach (var line in lines)
{
if (!line.Contains("connected") || line.Contains("disconnected")) continue;
// Try to find resolution and physical size
var resMatch = Regex.Match(line, @"(\d+)x(\d+)\+\d+\+\d+");
var mmMatch = Regex.Match(line, @"(\d+)mm x (\d+)mm");
if (resMatch.Success && mmMatch.Success)
{
if (int.TryParse(resMatch.Groups[1].Value, out int widthPx) &&
int.TryParse(mmMatch.Groups[1].Value, out int widthMm) &&
widthMm > 0)
{
float dpi = widthPx * 25.4f / widthMm;
scale = dpi / DefaultDpi;
return true;
}
}
}
return false;
}
catch
{
return false;
}
}
private static string? RunCommand(string command, string arguments)
{
try
{
using var process = new System.Diagnostics.Process();
process.StartInfo = new System.Diagnostics.ProcessStartInfo
{
FileName = command,
Arguments = arguments,
RedirectStandardOutput = true,
RedirectStandardError = true,
UseShellExecute = false,
CreateNoWindow = true
};
process.Start();
var output = process.StandardOutput.ReadToEnd();
process.WaitForExit(1000);
return output;
}
catch
{
return null;
}
}
/// <summary>
/// Converts logical pixels to physical pixels.
/// </summary>
public float ToPhysicalPixels(float logicalPixels)
{
return logicalPixels * _scaleFactor;
}
/// <summary>
/// Converts physical pixels to logical pixels.
/// </summary>
public float ToLogicalPixels(float physicalPixels)
{
return physicalPixels / _scaleFactor;
}
/// <summary>
/// Gets the recommended font scale factor.
/// </summary>
public float GetFontScaleFactor()
{
// Some desktop environments use a separate text scaling factor
try
{
var result = RunCommand("gsettings", "get org.gnome.desktop.interface text-scaling-factor");
if (!string.IsNullOrEmpty(result) && float.TryParse(result.Trim(), out float textScale))
{
return textScale;
}
}
catch { }
return _scaleFactor;
}
#region X11 Interop
[DllImport("libX11.so.6")]
private static extern nint XOpenDisplay(nint display);
[DllImport("libX11.so.6")]
private static extern void XCloseDisplay(nint display);
[DllImport("libX11.so.6")]
private static extern int XDefaultScreen(nint display);
[DllImport("libX11.so.6")]
private static extern int XDisplayWidth(nint display, int screen);
[DllImport("libX11.so.6")]
private static extern int XDisplayHeight(nint display, int screen);
[DllImport("libX11.so.6")]
private static extern int XDisplayWidthMM(nint display, int screen);
[DllImport("libX11.so.6")]
private static extern int XDisplayHeightMM(nint display, int screen);
#endregion
}
/// <summary>
/// Event args for scale change events.
/// </summary>
public class ScaleChangedEventArgs : EventArgs
{
/// <summary>
/// Gets the old scale factor.
/// </summary>
public float OldScale { get; }
/// <summary>
/// Gets the new scale factor.
/// </summary>
public float NewScale { get; }
/// <summary>
/// Gets the new DPI.
/// </summary>
public float NewDpi { get; }
public ScaleChangedEventArgs(float oldScale, float newScale, float newDpi)
{
OldScale = oldScale;
NewScale = newScale;
NewDpi = newDpi;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Provides high contrast mode detection and theme support for accessibility.
/// </summary>
public class HighContrastService
{
private bool _isHighContrastEnabled;
private HighContrastTheme _currentTheme = HighContrastTheme.None;
private bool _initialized;
/// <summary>
/// Gets whether high contrast mode is enabled.
/// </summary>
public bool IsHighContrastEnabled => _isHighContrastEnabled;
/// <summary>
/// Gets the current high contrast theme.
/// </summary>
public HighContrastTheme CurrentTheme => _currentTheme;
/// <summary>
/// Event raised when high contrast mode changes.
/// </summary>
public event EventHandler<HighContrastChangedEventArgs>? HighContrastChanged;
/// <summary>
/// Initializes the high contrast service.
/// </summary>
public void Initialize()
{
if (_initialized) return;
_initialized = true;
DetectHighContrast();
}
/// <summary>
/// Detects current high contrast mode settings.
/// </summary>
public void DetectHighContrast()
{
bool isEnabled = false;
var theme = HighContrastTheme.None;
// Try GNOME settings
if (TryGetGnomeHighContrast(out bool gnomeEnabled, out string? gnomeTheme))
{
isEnabled = gnomeEnabled;
if (gnomeEnabled)
{
theme = ParseThemeName(gnomeTheme);
}
}
// Try KDE settings
else if (TryGetKdeHighContrast(out bool kdeEnabled, out string? kdeTheme))
{
isEnabled = kdeEnabled;
if (kdeEnabled)
{
theme = ParseThemeName(kdeTheme);
}
}
// Try GTK settings
else if (TryGetGtkHighContrast(out bool gtkEnabled, out string? gtkTheme))
{
isEnabled = gtkEnabled;
if (gtkEnabled)
{
theme = ParseThemeName(gtkTheme);
}
}
// Check environment variables
else if (TryGetEnvironmentHighContrast(out bool envEnabled))
{
isEnabled = envEnabled;
theme = HighContrastTheme.WhiteOnBlack; // Default
}
UpdateHighContrast(isEnabled, theme);
}
private void UpdateHighContrast(bool isEnabled, HighContrastTheme theme)
{
if (_isHighContrastEnabled != isEnabled || _currentTheme != theme)
{
_isHighContrastEnabled = isEnabled;
_currentTheme = theme;
HighContrastChanged?.Invoke(this, new HighContrastChangedEventArgs(isEnabled, theme));
}
}
private static bool TryGetGnomeHighContrast(out bool isEnabled, out string? themeName)
{
isEnabled = false;
themeName = null;
try
{
// Check if high contrast is enabled via gsettings
var result = RunCommand("gsettings", "get org.gnome.desktop.a11y.interface high-contrast");
if (!string.IsNullOrEmpty(result))
{
isEnabled = result.Trim().ToLower() == "true";
}
// Get the current GTK theme
result = RunCommand("gsettings", "get org.gnome.desktop.interface gtk-theme");
if (!string.IsNullOrEmpty(result))
{
themeName = result.Trim().Trim('\'');
// Check if theme name indicates high contrast
if (!isEnabled && themeName != null)
{
var lowerTheme = themeName.ToLower();
isEnabled = lowerTheme.Contains("highcontrast") ||
lowerTheme.Contains("high-contrast") ||
lowerTheme.Contains("hc");
}
}
return true;
}
catch
{
return false;
}
}
private static bool TryGetKdeHighContrast(out bool isEnabled, out string? themeName)
{
isEnabled = false;
themeName = null;
try
{
// Check kdeglobals for color scheme
var configPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
".config", "kdeglobals");
if (!File.Exists(configPath)) return false;
var lines = File.ReadAllLines(configPath);
foreach (var line in lines)
{
if (line.StartsWith("ColorScheme="))
{
themeName = line.Substring("ColorScheme=".Length);
var lowerTheme = themeName.ToLower();
isEnabled = lowerTheme.Contains("highcontrast") ||
lowerTheme.Contains("high-contrast") ||
lowerTheme.Contains("breeze-high-contrast");
return true;
}
}
return false;
}
catch
{
return false;
}
}
private static bool TryGetGtkHighContrast(out bool isEnabled, out string? themeName)
{
isEnabled = false;
themeName = null;
try
{
// Check GTK settings.ini
var gtkConfigPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
".config", "gtk-3.0", "settings.ini");
if (!File.Exists(gtkConfigPath))
{
gtkConfigPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
".config", "gtk-4.0", "settings.ini");
}
if (!File.Exists(gtkConfigPath)) return false;
var lines = File.ReadAllLines(gtkConfigPath);
foreach (var line in lines)
{
if (line.StartsWith("gtk-theme-name="))
{
themeName = line.Substring("gtk-theme-name=".Length);
var lowerTheme = themeName.ToLower();
isEnabled = lowerTheme.Contains("highcontrast") ||
lowerTheme.Contains("high-contrast");
return true;
}
}
return false;
}
catch
{
return false;
}
}
private static bool TryGetEnvironmentHighContrast(out bool isEnabled)
{
isEnabled = false;
// Check GTK_THEME environment variable
var gtkTheme = Environment.GetEnvironmentVariable("GTK_THEME");
if (!string.IsNullOrEmpty(gtkTheme))
{
var lower = gtkTheme.ToLower();
isEnabled = lower.Contains("highcontrast") || lower.Contains("high-contrast");
if (isEnabled) return true;
}
// Check accessibility-related env vars
var forceA11y = Environment.GetEnvironmentVariable("GTK_A11Y");
if (forceA11y?.ToLower() == "atspi" || forceA11y == "1")
{
// A11y is forced, but doesn't necessarily mean high contrast
}
return isEnabled;
}
private static HighContrastTheme ParseThemeName(string? themeName)
{
if (string.IsNullOrEmpty(themeName))
return HighContrastTheme.WhiteOnBlack;
var lower = themeName.ToLower();
if (lower.Contains("inverse") || lower.Contains("dark") || lower.Contains("white-on-black"))
return HighContrastTheme.WhiteOnBlack;
if (lower.Contains("light") || lower.Contains("black-on-white"))
return HighContrastTheme.BlackOnWhite;
// Default to white on black (more common high contrast choice)
return HighContrastTheme.WhiteOnBlack;
}
/// <summary>
/// Gets the appropriate colors for the current high contrast theme.
/// </summary>
public HighContrastColors GetColors()
{
return _currentTheme switch
{
HighContrastTheme.WhiteOnBlack => new HighContrastColors
{
Background = SKColors.Black,
Foreground = SKColors.White,
Accent = new SKColor(0, 255, 255), // Cyan
Border = SKColors.White,
Error = new SKColor(255, 100, 100),
Success = new SKColor(100, 255, 100),
Warning = SKColors.Yellow,
Link = new SKColor(100, 200, 255),
LinkVisited = new SKColor(200, 150, 255),
Selection = new SKColor(0, 120, 215),
SelectionText = SKColors.White,
DisabledText = new SKColor(160, 160, 160),
DisabledBackground = new SKColor(40, 40, 40)
},
HighContrastTheme.BlackOnWhite => new HighContrastColors
{
Background = SKColors.White,
Foreground = SKColors.Black,
Accent = new SKColor(0, 0, 200), // Dark blue
Border = SKColors.Black,
Error = new SKColor(180, 0, 0),
Success = new SKColor(0, 130, 0),
Warning = new SKColor(180, 120, 0),
Link = new SKColor(0, 0, 180),
LinkVisited = new SKColor(80, 0, 120),
Selection = new SKColor(0, 120, 215),
SelectionText = SKColors.White,
DisabledText = new SKColor(100, 100, 100),
DisabledBackground = new SKColor(220, 220, 220)
},
_ => GetDefaultColors()
};
}
private static HighContrastColors GetDefaultColors()
{
return new HighContrastColors
{
Background = SKColors.White,
Foreground = new SKColor(33, 33, 33),
Accent = new SKColor(33, 150, 243),
Border = new SKColor(200, 200, 200),
Error = new SKColor(244, 67, 54),
Success = new SKColor(76, 175, 80),
Warning = new SKColor(255, 152, 0),
Link = new SKColor(33, 150, 243),
LinkVisited = new SKColor(156, 39, 176),
Selection = new SKColor(33, 150, 243),
SelectionText = SKColors.White,
DisabledText = new SKColor(158, 158, 158),
DisabledBackground = new SKColor(238, 238, 238)
};
}
/// <summary>
/// Forces a specific high contrast mode (for testing or user preference override).
/// </summary>
public void ForceHighContrast(bool enabled, HighContrastTheme theme = HighContrastTheme.WhiteOnBlack)
{
UpdateHighContrast(enabled, theme);
}
private static string? RunCommand(string command, string arguments)
{
try
{
using var process = new System.Diagnostics.Process();
process.StartInfo = new System.Diagnostics.ProcessStartInfo
{
FileName = command,
Arguments = arguments,
RedirectStandardOutput = true,
RedirectStandardError = true,
UseShellExecute = false,
CreateNoWindow = true
};
process.Start();
var output = process.StandardOutput.ReadToEnd();
process.WaitForExit(1000);
return output;
}
catch
{
return null;
}
}
}
/// <summary>
/// High contrast theme types.
/// </summary>
public enum HighContrastTheme
{
None,
WhiteOnBlack,
BlackOnWhite
}
/// <summary>
/// Color palette for high contrast mode.
/// </summary>
public class HighContrastColors
{
public SKColor Background { get; set; }
public SKColor Foreground { get; set; }
public SKColor Accent { get; set; }
public SKColor Border { get; set; }
public SKColor Error { get; set; }
public SKColor Success { get; set; }
public SKColor Warning { get; set; }
public SKColor Link { get; set; }
public SKColor LinkVisited { get; set; }
public SKColor Selection { get; set; }
public SKColor SelectionText { get; set; }
public SKColor DisabledText { get; set; }
public SKColor DisabledBackground { get; set; }
}
/// <summary>
/// Event args for high contrast mode changes.
/// </summary>
public class HighContrastChangedEventArgs : EventArgs
{
/// <summary>
/// Gets whether high contrast mode is enabled.
/// </summary>
public bool IsEnabled { get; }
/// <summary>
/// Gets the current theme.
/// </summary>
public HighContrastTheme Theme { get; }
public HighContrastChangedEventArgs(bool isEnabled, HighContrastTheme theme)
{
IsEnabled = isEnabled;
Theme = theme;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Interface for accessibility services using AT-SPI2.
/// Provides screen reader support on Linux.
/// </summary>
public interface IAccessibilityService
{
/// <summary>
/// Gets whether accessibility is enabled.
/// </summary>
bool IsEnabled { get; }
/// <summary>
/// Initializes the accessibility service.
/// </summary>
void Initialize();
/// <summary>
/// Registers an accessible object.
/// </summary>
/// <param name="accessible">The accessible object to register.</param>
void Register(IAccessible accessible);
/// <summary>
/// Unregisters an accessible object.
/// </summary>
/// <param name="accessible">The accessible object to unregister.</param>
void Unregister(IAccessible accessible);
/// <summary>
/// Notifies that focus has changed.
/// </summary>
/// <param name="accessible">The newly focused accessible object.</param>
void NotifyFocusChanged(IAccessible? accessible);
/// <summary>
/// Notifies that a property has changed.
/// </summary>
/// <param name="accessible">The accessible object.</param>
/// <param name="property">The property that changed.</param>
void NotifyPropertyChanged(IAccessible accessible, AccessibleProperty property);
/// <summary>
/// Notifies that an accessible's state has changed.
/// </summary>
/// <param name="accessible">The accessible object.</param>
/// <param name="state">The state that changed.</param>
/// <param name="value">The new value of the state.</param>
void NotifyStateChanged(IAccessible accessible, AccessibleState state, bool value);
/// <summary>
/// Announces text to the screen reader.
/// </summary>
/// <param name="text">The text to announce.</param>
/// <param name="priority">The announcement priority.</param>
void Announce(string text, AnnouncementPriority priority = AnnouncementPriority.Polite);
/// <summary>
/// Shuts down the accessibility service.
/// </summary>
void Shutdown();
}
/// <summary>
/// Interface for accessible objects.
/// </summary>
public interface IAccessible
{
/// <summary>
/// Gets the unique identifier for this accessible.
/// </summary>
string AccessibleId { get; }
/// <summary>
/// Gets the accessible name (label for screen readers).
/// </summary>
string AccessibleName { get; }
/// <summary>
/// Gets the accessible description (additional context).
/// </summary>
string AccessibleDescription { get; }
/// <summary>
/// Gets the accessible role.
/// </summary>
AccessibleRole Role { get; }
/// <summary>
/// Gets the accessible states.
/// </summary>
AccessibleStates States { get; }
/// <summary>
/// Gets the parent accessible.
/// </summary>
IAccessible? Parent { get; }
/// <summary>
/// Gets the child accessibles.
/// </summary>
IReadOnlyList<IAccessible> Children { get; }
/// <summary>
/// Gets the bounding rectangle in screen coordinates.
/// </summary>
AccessibleRect Bounds { get; }
/// <summary>
/// Gets the available actions.
/// </summary>
IReadOnlyList<AccessibleAction> Actions { get; }
/// <summary>
/// Performs an action.
/// </summary>
/// <param name="actionName">The name of the action to perform.</param>
/// <returns>True if the action was performed.</returns>
bool DoAction(string actionName);
/// <summary>
/// Gets the accessible value (for sliders, progress bars, etc.).
/// </summary>
double? Value { get; }
/// <summary>
/// Gets the minimum value.
/// </summary>
double? MinValue { get; }
/// <summary>
/// Gets the maximum value.
/// </summary>
double? MaxValue { get; }
/// <summary>
/// Sets the accessible value.
/// </summary>
bool SetValue(double value);
}
/// <summary>
/// Interface for accessible text components.
/// </summary>
public interface IAccessibleText : IAccessible
{
/// <summary>
/// Gets the text content.
/// </summary>
string Text { get; }
/// <summary>
/// Gets the caret offset.
/// </summary>
int CaretOffset { get; }
/// <summary>
/// Gets the number of selections.
/// </summary>
int SelectionCount { get; }
/// <summary>
/// Gets the selection at the specified index.
/// </summary>
(int Start, int End) GetSelection(int index);
/// <summary>
/// Sets the selection.
/// </summary>
bool SetSelection(int index, int start, int end);
/// <summary>
/// Gets the character at the specified offset.
/// </summary>
char GetCharacterAtOffset(int offset);
/// <summary>
/// Gets the text in the specified range.
/// </summary>
string GetTextInRange(int start, int end);
/// <summary>
/// Gets the bounds of the character at the specified offset.
/// </summary>
AccessibleRect GetCharacterBounds(int offset);
}
/// <summary>
/// Interface for editable text components.
/// </summary>
public interface IAccessibleEditableText : IAccessibleText
{
/// <summary>
/// Sets the text content.
/// </summary>
bool SetText(string text);
/// <summary>
/// Inserts text at the specified position.
/// </summary>
bool InsertText(int position, string text);
/// <summary>
/// Deletes text in the specified range.
/// </summary>
bool DeleteText(int start, int end);
/// <summary>
/// Copies text to clipboard.
/// </summary>
bool CopyText(int start, int end);
/// <summary>
/// Cuts text to clipboard.
/// </summary>
bool CutText(int start, int end);
/// <summary>
/// Pastes text from clipboard.
/// </summary>
bool PasteText(int position);
}
/// <summary>
/// Accessible roles (based on AT-SPI2 roles).
/// </summary>
public enum AccessibleRole
{
Unknown,
Window,
Application,
Panel,
Frame,
Button,
CheckBox,
RadioButton,
ComboBox,
Entry,
Label,
List,
ListItem,
Menu,
MenuBar,
MenuItem,
ScrollBar,
Slider,
SpinButton,
StatusBar,
Tab,
TabPanel,
Text,
ToggleButton,
ToolBar,
ToolTip,
Tree,
TreeItem,
Image,
ProgressBar,
Separator,
Link,
Table,
TableCell,
TableRow,
TableColumnHeader,
TableRowHeader,
PageTab,
PageTabList,
Dialog,
Alert,
Filler,
Icon,
Canvas
}
/// <summary>
/// Accessible states.
/// </summary>
[Flags]
public enum AccessibleStates : long
{
None = 0,
Active = 1L << 0,
Armed = 1L << 1,
Busy = 1L << 2,
Checked = 1L << 3,
Collapsed = 1L << 4,
Defunct = 1L << 5,
Editable = 1L << 6,
Enabled = 1L << 7,
Expandable = 1L << 8,
Expanded = 1L << 9,
Focusable = 1L << 10,
Focused = 1L << 11,
HasToolTip = 1L << 12,
Horizontal = 1L << 13,
Iconified = 1L << 14,
Modal = 1L << 15,
MultiLine = 1L << 16,
MultiSelectable = 1L << 17,
Opaque = 1L << 18,
Pressed = 1L << 19,
Resizable = 1L << 20,
Selectable = 1L << 21,
Selected = 1L << 22,
Sensitive = 1L << 23,
Showing = 1L << 24,
SingleLine = 1L << 25,
Stale = 1L << 26,
Transient = 1L << 27,
Vertical = 1L << 28,
Visible = 1L << 29,
ManagesDescendants = 1L << 30,
Indeterminate = 1L << 31,
Required = 1L << 32,
Truncated = 1L << 33,
Animated = 1L << 34,
InvalidEntry = 1L << 35,
SupportsAutocompletion = 1L << 36,
SelectableText = 1L << 37,
IsDefault = 1L << 38,
Visited = 1L << 39,
ReadOnly = 1L << 40
}
/// <summary>
/// Accessible state enumeration for notifications.
/// </summary>
public enum AccessibleState
{
Active,
Armed,
Busy,
Checked,
Collapsed,
Defunct,
Editable,
Enabled,
Expandable,
Expanded,
Focusable,
Focused,
Horizontal,
Iconified,
Modal,
MultiLine,
Opaque,
Pressed,
Resizable,
Selectable,
Selected,
Sensitive,
Showing,
SingleLine,
Stale,
Transient,
Vertical,
Visible,
ManagesDescendants,
Indeterminate,
Required,
InvalidEntry,
ReadOnly
}
/// <summary>
/// Accessible property for notifications.
/// </summary>
public enum AccessibleProperty
{
Name,
Description,
Role,
Value,
Parent,
Children
}
/// <summary>
/// Announcement priority.
/// </summary>
public enum AnnouncementPriority
{
/// <summary>
/// Low priority - can be interrupted.
/// </summary>
Polite,
/// <summary>
/// High priority - interrupts current speech.
/// </summary>
Assertive
}
/// <summary>
/// Represents an accessible action.
/// </summary>
public class AccessibleAction
{
/// <summary>
/// The action name.
/// </summary>
public string Name { get; set; } = string.Empty;
/// <summary>
/// The action description.
/// </summary>
public string Description { get; set; } = string.Empty;
/// <summary>
/// The keyboard shortcut for this action.
/// </summary>
public string? KeyBinding { get; set; }
}
/// <summary>
/// Represents a rectangle in accessible coordinates.
/// </summary>
public struct AccessibleRect
{
public int X { get; set; }
public int Y { get; set; }
public int Width { get; set; }
public int Height { get; set; }
public AccessibleRect(int x, int y, int width, int height)
{
X = x;
Y = y;
Width = width;
Height = height;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
using System.Text;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// IBus Input Method service using D-Bus interface.
/// Provides modern IME support on Linux desktops.
/// </summary>
public class IBusInputMethodService : IInputMethodService, IDisposable
{
private nint _bus;
private nint _context;
private IInputContext? _currentContext;
private string _preEditText = string.Empty;
private int _preEditCursorPosition;
private bool _isActive;
private bool _disposed;
// Callback delegates (prevent GC)
private IBusCommitTextCallback? _commitCallback;
private IBusUpdatePreeditTextCallback? _preeditCallback;
private IBusShowPreeditTextCallback? _showPreeditCallback;
private IBusHidePreeditTextCallback? _hidePreeditCallback;
public bool IsActive => _isActive;
public string PreEditText => _preEditText;
public int PreEditCursorPosition => _preEditCursorPosition;
public event EventHandler<TextCommittedEventArgs>? TextCommitted;
public event EventHandler<PreEditChangedEventArgs>? PreEditChanged;
public event EventHandler? PreEditEnded;
public void Initialize(nint windowHandle)
{
try
{
// Initialize IBus
ibus_init();
// Get the IBus bus connection
_bus = ibus_bus_new();
if (_bus == IntPtr.Zero)
{
Console.WriteLine("IBusInputMethodService: Failed to connect to IBus");
return;
}
// Check if IBus is connected
if (!ibus_bus_is_connected(_bus))
{
Console.WriteLine("IBusInputMethodService: IBus not connected");
return;
}
// Create input context
_context = ibus_bus_create_input_context(_bus, "maui-linux");
if (_context == IntPtr.Zero)
{
Console.WriteLine("IBusInputMethodService: Failed to create input context");
return;
}
// Set capabilities
uint capabilities = IBUS_CAP_PREEDIT_TEXT | IBUS_CAP_FOCUS | IBUS_CAP_SURROUNDING_TEXT;
ibus_input_context_set_capabilities(_context, capabilities);
// Connect signals
ConnectSignals();
Console.WriteLine("IBusInputMethodService: Initialized successfully");
}
catch (Exception ex)
{
Console.WriteLine($"IBusInputMethodService: Initialization failed - {ex.Message}");
}
}
private void ConnectSignals()
{
if (_context == IntPtr.Zero) return;
// Set up callbacks for IBus signals
_commitCallback = OnCommitText;
_preeditCallback = OnUpdatePreeditText;
_showPreeditCallback = OnShowPreeditText;
_hidePreeditCallback = OnHidePreeditText;
// Connect to commit-text signal
g_signal_connect(_context, "commit-text",
Marshal.GetFunctionPointerForDelegate(_commitCallback), IntPtr.Zero);
// Connect to update-preedit-text signal
g_signal_connect(_context, "update-preedit-text",
Marshal.GetFunctionPointerForDelegate(_preeditCallback), IntPtr.Zero);
// Connect to show-preedit-text signal
g_signal_connect(_context, "show-preedit-text",
Marshal.GetFunctionPointerForDelegate(_showPreeditCallback), IntPtr.Zero);
// Connect to hide-preedit-text signal
g_signal_connect(_context, "hide-preedit-text",
Marshal.GetFunctionPointerForDelegate(_hidePreeditCallback), IntPtr.Zero);
}
private void OnCommitText(nint context, nint text, nint userData)
{
if (text == IntPtr.Zero) return;
string committedText = GetIBusTextString(text);
if (!string.IsNullOrEmpty(committedText))
{
_preEditText = string.Empty;
_preEditCursorPosition = 0;
_isActive = false;
TextCommitted?.Invoke(this, new TextCommittedEventArgs(committedText));
_currentContext?.OnTextCommitted(committedText);
}
}
private void OnUpdatePreeditText(nint context, nint text, uint cursorPos, bool visible, nint userData)
{
if (!visible)
{
OnHidePreeditText(context, userData);
return;
}
_isActive = true;
_preEditText = text != IntPtr.Zero ? GetIBusTextString(text) : string.Empty;
_preEditCursorPosition = (int)cursorPos;
var attributes = GetPreeditAttributes(text);
PreEditChanged?.Invoke(this, new PreEditChangedEventArgs(_preEditText, _preEditCursorPosition, attributes));
_currentContext?.OnPreEditChanged(_preEditText, _preEditCursorPosition);
}
private void OnShowPreeditText(nint context, nint userData)
{
_isActive = true;
}
private void OnHidePreeditText(nint context, nint userData)
{
_isActive = false;
_preEditText = string.Empty;
_preEditCursorPosition = 0;
PreEditEnded?.Invoke(this, EventArgs.Empty);
_currentContext?.OnPreEditEnded();
}
private string GetIBusTextString(nint ibusText)
{
if (ibusText == IntPtr.Zero) return string.Empty;
nint textPtr = ibus_text_get_text(ibusText);
if (textPtr == IntPtr.Zero) return string.Empty;
return Marshal.PtrToStringUTF8(textPtr) ?? string.Empty;
}
private List<PreEditAttribute> GetPreeditAttributes(nint ibusText)
{
var attributes = new List<PreEditAttribute>();
if (ibusText == IntPtr.Zero) return attributes;
nint attrList = ibus_text_get_attributes(ibusText);
if (attrList == IntPtr.Zero) return attributes;
uint count = ibus_attr_list_size(attrList);
for (uint i = 0; i < count; i++)
{
nint attr = ibus_attr_list_get(attrList, i);
if (attr == IntPtr.Zero) continue;
var type = ibus_attribute_get_attr_type(attr);
var start = ibus_attribute_get_start_index(attr);
var end = ibus_attribute_get_end_index(attr);
attributes.Add(new PreEditAttribute
{
Start = (int)start,
Length = (int)(end - start),
Type = ConvertAttributeType(type)
});
}
return attributes;
}
private PreEditAttributeType ConvertAttributeType(uint ibusType)
{
return ibusType switch
{
IBUS_ATTR_TYPE_UNDERLINE => PreEditAttributeType.Underline,
IBUS_ATTR_TYPE_FOREGROUND => PreEditAttributeType.Highlighted,
IBUS_ATTR_TYPE_BACKGROUND => PreEditAttributeType.Reverse,
_ => PreEditAttributeType.None
};
}
public void SetFocus(IInputContext? context)
{
_currentContext = context;
if (_context != IntPtr.Zero)
{
if (context != null)
{
ibus_input_context_focus_in(_context);
}
else
{
ibus_input_context_focus_out(_context);
}
}
}
public void SetCursorLocation(int x, int y, int width, int height)
{
if (_context == IntPtr.Zero) return;
ibus_input_context_set_cursor_location(_context, x, y, width, height);
}
public bool ProcessKeyEvent(uint keyCode, KeyModifiers modifiers, bool isKeyDown)
{
if (_context == IntPtr.Zero) return false;
uint state = ConvertModifiers(modifiers);
if (!isKeyDown)
{
state |= IBUS_RELEASE_MASK;
}
return ibus_input_context_process_key_event(_context, keyCode, keyCode, state);
}
private uint ConvertModifiers(KeyModifiers modifiers)
{
uint state = 0;
if (modifiers.HasFlag(KeyModifiers.Shift)) state |= IBUS_SHIFT_MASK;
if (modifiers.HasFlag(KeyModifiers.Control)) state |= IBUS_CONTROL_MASK;
if (modifiers.HasFlag(KeyModifiers.Alt)) state |= IBUS_MOD1_MASK;
if (modifiers.HasFlag(KeyModifiers.Super)) state |= IBUS_SUPER_MASK;
if (modifiers.HasFlag(KeyModifiers.CapsLock)) state |= IBUS_LOCK_MASK;
return state;
}
public void Reset()
{
if (_context != IntPtr.Zero)
{
ibus_input_context_reset(_context);
}
_preEditText = string.Empty;
_preEditCursorPosition = 0;
_isActive = false;
PreEditEnded?.Invoke(this, EventArgs.Empty);
_currentContext?.OnPreEditEnded();
}
public void Shutdown()
{
Dispose();
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
if (_context != IntPtr.Zero)
{
ibus_input_context_focus_out(_context);
g_object_unref(_context);
_context = IntPtr.Zero;
}
if (_bus != IntPtr.Zero)
{
g_object_unref(_bus);
_bus = IntPtr.Zero;
}
}
#region IBus Constants
private const uint IBUS_CAP_PREEDIT_TEXT = 1 << 0;
private const uint IBUS_CAP_FOCUS = 1 << 3;
private const uint IBUS_CAP_SURROUNDING_TEXT = 1 << 5;
private const uint IBUS_SHIFT_MASK = 1 << 0;
private const uint IBUS_LOCK_MASK = 1 << 1;
private const uint IBUS_CONTROL_MASK = 1 << 2;
private const uint IBUS_MOD1_MASK = 1 << 3;
private const uint IBUS_SUPER_MASK = 1 << 26;
private const uint IBUS_RELEASE_MASK = 1 << 30;
private const uint IBUS_ATTR_TYPE_UNDERLINE = 1;
private const uint IBUS_ATTR_TYPE_FOREGROUND = 2;
private const uint IBUS_ATTR_TYPE_BACKGROUND = 3;
#endregion
#region IBus Interop
private delegate void IBusCommitTextCallback(nint context, nint text, nint userData);
private delegate void IBusUpdatePreeditTextCallback(nint context, nint text, uint cursorPos, bool visible, nint userData);
private delegate void IBusShowPreeditTextCallback(nint context, nint userData);
private delegate void IBusHidePreeditTextCallback(nint context, nint userData);
[DllImport("libibus-1.0.so.5")]
private static extern void ibus_init();
[DllImport("libibus-1.0.so.5")]
private static extern nint ibus_bus_new();
[DllImport("libibus-1.0.so.5")]
private static extern bool ibus_bus_is_connected(nint bus);
[DllImport("libibus-1.0.so.5")]
private static extern nint ibus_bus_create_input_context(nint bus, string clientName);
[DllImport("libibus-1.0.so.5")]
private static extern void ibus_input_context_set_capabilities(nint context, uint capabilities);
[DllImport("libibus-1.0.so.5")]
private static extern void ibus_input_context_focus_in(nint context);
[DllImport("libibus-1.0.so.5")]
private static extern void ibus_input_context_focus_out(nint context);
[DllImport("libibus-1.0.so.5")]
private static extern void ibus_input_context_reset(nint context);
[DllImport("libibus-1.0.so.5")]
private static extern void ibus_input_context_set_cursor_location(nint context, int x, int y, int w, int h);
[DllImport("libibus-1.0.so.5")]
private static extern bool ibus_input_context_process_key_event(nint context, uint keyval, uint keycode, uint state);
[DllImport("libibus-1.0.so.5")]
private static extern nint ibus_text_get_text(nint text);
[DllImport("libibus-1.0.so.5")]
private static extern nint ibus_text_get_attributes(nint text);
[DllImport("libibus-1.0.so.5")]
private static extern uint ibus_attr_list_size(nint attrList);
[DllImport("libibus-1.0.so.5")]
private static extern nint ibus_attr_list_get(nint attrList, uint index);
[DllImport("libibus-1.0.so.5")]
private static extern uint ibus_attribute_get_attr_type(nint attr);
[DllImport("libibus-1.0.so.5")]
private static extern uint ibus_attribute_get_start_index(nint attr);
[DllImport("libibus-1.0.so.5")]
private static extern uint ibus_attribute_get_end_index(nint attr);
[DllImport("libgobject-2.0.so.0")]
private static extern void g_object_unref(nint obj);
[DllImport("libgobject-2.0.so.0")]
private static extern ulong g_signal_connect(nint instance, string signal, nint handler, nint data);
#endregion
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Interface for Input Method Editor (IME) services.
/// Provides support for complex text input methods like CJK languages.
/// </summary>
public interface IInputMethodService
{
/// <summary>
/// Gets whether IME is currently active.
/// </summary>
bool IsActive { get; }
/// <summary>
/// Gets the current pre-edit (composition) text.
/// </summary>
string PreEditText { get; }
/// <summary>
/// Gets the cursor position within the pre-edit text.
/// </summary>
int PreEditCursorPosition { get; }
/// <summary>
/// Initializes the IME service for the given window.
/// </summary>
/// <param name="windowHandle">The native window handle.</param>
void Initialize(nint windowHandle);
/// <summary>
/// Sets focus to the specified input context.
/// </summary>
/// <param name="context">The input context to focus.</param>
void SetFocus(IInputContext? context);
/// <summary>
/// Sets the cursor location for candidate window positioning.
/// </summary>
/// <param name="x">X coordinate in screen space.</param>
/// <param name="y">Y coordinate in screen space.</param>
/// <param name="width">Width of the cursor area.</param>
/// <param name="height">Height of the cursor area.</param>
void SetCursorLocation(int x, int y, int width, int height);
/// <summary>
/// Processes a key event through the IME.
/// </summary>
/// <param name="keyCode">The key code.</param>
/// <param name="modifiers">Key modifiers.</param>
/// <param name="isKeyDown">True for key press, false for key release.</param>
/// <returns>True if the IME handled the event.</returns>
bool ProcessKeyEvent(uint keyCode, KeyModifiers modifiers, bool isKeyDown);
/// <summary>
/// Resets the IME state, canceling any composition.
/// </summary>
void Reset();
/// <summary>
/// Shuts down the IME service.
/// </summary>
void Shutdown();
/// <summary>
/// Event raised when text is committed from IME.
/// </summary>
event EventHandler<TextCommittedEventArgs>? TextCommitted;
/// <summary>
/// Event raised when pre-edit (composition) text changes.
/// </summary>
event EventHandler<PreEditChangedEventArgs>? PreEditChanged;
/// <summary>
/// Event raised when pre-edit is completed or cancelled.
/// </summary>
event EventHandler? PreEditEnded;
}
/// <summary>
/// Represents an input context that can receive IME input.
/// </summary>
public interface IInputContext
{
/// <summary>
/// Gets or sets the current text content.
/// </summary>
string Text { get; set; }
/// <summary>
/// Gets or sets the cursor position.
/// </summary>
int CursorPosition { get; set; }
/// <summary>
/// Gets the selection start position.
/// </summary>
int SelectionStart { get; }
/// <summary>
/// Gets the selection length.
/// </summary>
int SelectionLength { get; }
/// <summary>
/// Called when text is committed from the IME.
/// </summary>
/// <param name="text">The committed text.</param>
void OnTextCommitted(string text);
/// <summary>
/// Called when pre-edit text changes.
/// </summary>
/// <param name="preEditText">The current pre-edit text.</param>
/// <param name="cursorPosition">Cursor position within pre-edit text.</param>
void OnPreEditChanged(string preEditText, int cursorPosition);
/// <summary>
/// Called when pre-edit mode ends.
/// </summary>
void OnPreEditEnded();
}
/// <summary>
/// Event args for text committed events.
/// </summary>
public class TextCommittedEventArgs : EventArgs
{
/// <summary>
/// The committed text.
/// </summary>
public string Text { get; }
public TextCommittedEventArgs(string text)
{
Text = text;
}
}
/// <summary>
/// Event args for pre-edit changed events.
/// </summary>
public class PreEditChangedEventArgs : EventArgs
{
/// <summary>
/// The current pre-edit text.
/// </summary>
public string PreEditText { get; }
/// <summary>
/// Cursor position within the pre-edit text.
/// </summary>
public int CursorPosition { get; }
/// <summary>
/// Formatting attributes for the pre-edit text.
/// </summary>
public IReadOnlyList<PreEditAttribute> Attributes { get; }
public PreEditChangedEventArgs(string preEditText, int cursorPosition, IReadOnlyList<PreEditAttribute>? attributes = null)
{
PreEditText = preEditText;
CursorPosition = cursorPosition;
Attributes = attributes ?? Array.Empty<PreEditAttribute>();
}
}
/// <summary>
/// Represents formatting for a portion of pre-edit text.
/// </summary>
public class PreEditAttribute
{
/// <summary>
/// Start position in the pre-edit text.
/// </summary>
public int Start { get; set; }
/// <summary>
/// Length of the attributed range.
/// </summary>
public int Length { get; set; }
/// <summary>
/// The attribute type.
/// </summary>
public PreEditAttributeType Type { get; set; }
}
/// <summary>
/// Types of pre-edit text attributes.
/// </summary>
public enum PreEditAttributeType
{
/// <summary>
/// Normal text (no special formatting).
/// </summary>
None,
/// <summary>
/// Underlined text (typical for composition).
/// </summary>
Underline,
/// <summary>
/// Highlighted/selected text.
/// </summary>
Highlighted,
/// <summary>
/// Reverse video (selected clause in some IMEs).
/// </summary>
Reverse
}
/// <summary>
/// Key modifiers for IME processing.
/// </summary>
[Flags]
public enum KeyModifiers
{
None = 0,
Shift = 1 << 0,
Control = 1 << 1,
Alt = 1 << 2,
Super = 1 << 3,
CapsLock = 1 << 4,
NumLock = 1 << 5
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Factory for creating the appropriate Input Method service.
/// Automatically selects IBus or XIM based on availability.
/// </summary>
public static class InputMethodServiceFactory
{
private static IInputMethodService? _instance;
private static readonly object _lock = new();
/// <summary>
/// Gets the singleton input method service instance.
/// </summary>
public static IInputMethodService Instance
{
get
{
if (_instance == null)
{
lock (_lock)
{
_instance ??= CreateService();
}
}
return _instance;
}
}
/// <summary>
/// Creates the most appropriate input method service for the current environment.
/// </summary>
public static IInputMethodService CreateService()
{
// Check environment variable for user preference
var imePreference = Environment.GetEnvironmentVariable("MAUI_INPUT_METHOD");
if (!string.IsNullOrEmpty(imePreference))
{
return imePreference.ToLowerInvariant() switch
{
"ibus" => CreateIBusService(),
"xim" => CreateXIMService(),
"none" => new NullInputMethodService(),
_ => CreateAutoService()
};
}
return CreateAutoService();
}
private static IInputMethodService CreateAutoService()
{
// Try IBus first (most common on modern Linux)
if (IsIBusAvailable())
{
Console.WriteLine("InputMethodServiceFactory: Using IBus");
return CreateIBusService();
}
// Fall back to XIM
if (IsXIMAvailable())
{
Console.WriteLine("InputMethodServiceFactory: Using XIM");
return CreateXIMService();
}
// No IME available
Console.WriteLine("InputMethodServiceFactory: No IME available, using null service");
return new NullInputMethodService();
}
private static IInputMethodService CreateIBusService()
{
try
{
return new IBusInputMethodService();
}
catch (Exception ex)
{
Console.WriteLine($"InputMethodServiceFactory: Failed to create IBus service - {ex.Message}");
return new NullInputMethodService();
}
}
private static IInputMethodService CreateXIMService()
{
try
{
return new X11InputMethodService();
}
catch (Exception ex)
{
Console.WriteLine($"InputMethodServiceFactory: Failed to create XIM service - {ex.Message}");
return new NullInputMethodService();
}
}
private static bool IsIBusAvailable()
{
// Check if IBus daemon is running
var ibusAddress = Environment.GetEnvironmentVariable("IBUS_ADDRESS");
if (!string.IsNullOrEmpty(ibusAddress))
{
return true;
}
// Try to load IBus library
try
{
var handle = NativeLibrary.Load("libibus-1.0.so.5");
NativeLibrary.Free(handle);
return true;
}
catch
{
return false;
}
}
private static bool IsXIMAvailable()
{
// Check XMODIFIERS environment variable
var xmodifiers = Environment.GetEnvironmentVariable("XMODIFIERS");
if (!string.IsNullOrEmpty(xmodifiers) && xmodifiers.Contains("@im="))
{
return true;
}
// Check if running under X11
var display = Environment.GetEnvironmentVariable("DISPLAY");
return !string.IsNullOrEmpty(display);
}
/// <summary>
/// Resets the singleton instance (useful for testing).
/// </summary>
public static void Reset()
{
lock (_lock)
{
_instance?.Shutdown();
_instance = null;
}
}
}
/// <summary>
/// Null implementation of IInputMethodService for when no IME is available.
/// </summary>
public class NullInputMethodService : IInputMethodService
{
public bool IsActive => false;
public string PreEditText => string.Empty;
public int PreEditCursorPosition => 0;
public event EventHandler<TextCommittedEventArgs>? TextCommitted;
public event EventHandler<PreEditChangedEventArgs>? PreEditChanged;
public event EventHandler? PreEditEnded;
public void Initialize(nint windowHandle) { }
public void SetFocus(IInputContext? context) { }
public void SetCursorLocation(int x, int y, int width, int height) { }
public bool ProcessKeyEvent(uint keyCode, KeyModifiers modifiers, bool isKeyDown) => false;
public void Reset() { }
public void Shutdown() { }
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using Microsoft.Maui.ApplicationModel;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux launcher service for opening URLs and files.
/// </summary>
public class LauncherService : ILauncher
{
public Task<bool> CanOpenAsync(Uri uri)
{
// On Linux, we can generally open any URI using xdg-open
return Task.FromResult(true);
}
public Task<bool> OpenAsync(Uri uri)
{
return Task.Run(() =>
{
try
{
var psi = new ProcessStartInfo
{
FileName = "xdg-open",
Arguments = uri.ToString(),
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(psi);
if (process == null)
return false;
// Don't wait for the process to exit - xdg-open may spawn another process
return true;
}
catch
{
return false;
}
});
}
public Task<bool> OpenAsync(OpenFileRequest request)
{
if (request.File == null)
return Task.FromResult(false);
return Task.Run(() =>
{
try
{
var filePath = request.File.FullPath;
var psi = new ProcessStartInfo
{
FileName = "xdg-open",
Arguments = $"\"{filePath}\"",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(psi);
return process != null;
}
catch
{
return false;
}
});
}
public Task<bool> TryOpenAsync(Uri uri)
{
return OpenAsync(uri);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux notification service using notify-send (libnotify).
/// </summary>
public class NotificationService
{
private readonly string _appName;
private readonly string? _defaultIconPath;
public NotificationService(string appName = "MAUI Application", string? defaultIconPath = null)
{
_appName = appName;
_defaultIconPath = defaultIconPath;
}
/// <summary>
/// Shows a simple notification.
/// </summary>
public async Task ShowAsync(string title, string message)
{
await ShowAsync(new NotificationOptions
{
Title = title,
Message = message
});
}
/// <summary>
/// Shows a notification with options.
/// </summary>
public async Task ShowAsync(NotificationOptions options)
{
try
{
var args = BuildNotifyArgs(options);
var startInfo = new ProcessStartInfo
{
FileName = "notify-send",
Arguments = args,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
await process.WaitForExitAsync();
}
}
catch (Exception ex)
{
// Fall back to zenity notification
await TryZenityNotification(options);
}
}
private string BuildNotifyArgs(NotificationOptions options)
{
var args = new List<string>();
// App name
args.Add($"--app-name=\"{EscapeArg(_appName)}\"");
// Urgency
args.Add($"--urgency={options.Urgency.ToString().ToLower()}");
// Expire time (milliseconds, 0 = never expire)
if (options.ExpireTimeMs > 0)
{
args.Add($"--expire-time={options.ExpireTimeMs}");
}
// Icon
var icon = options.IconPath ?? _defaultIconPath;
if (!string.IsNullOrEmpty(icon))
{
args.Add($"--icon=\"{EscapeArg(icon)}\"");
}
else if (!string.IsNullOrEmpty(options.IconName))
{
args.Add($"--icon={options.IconName}");
}
// Category
if (!string.IsNullOrEmpty(options.Category))
{
args.Add($"--category={options.Category}");
}
// Hint for transient notifications
if (options.IsTransient)
{
args.Add("--hint=int:transient:1");
}
// Actions (if supported)
if (options.Actions?.Count > 0)
{
foreach (var action in options.Actions)
{
args.Add($"--action=\"{action.Key}={EscapeArg(action.Value)}\"");
}
}
// Title and message
args.Add($"\"{EscapeArg(options.Title)}\"");
args.Add($"\"{EscapeArg(options.Message)}\"");
return string.Join(" ", args);
}
private async Task TryZenityNotification(NotificationOptions options)
{
try
{
var iconArg = "";
if (!string.IsNullOrEmpty(options.IconPath))
{
iconArg = $"--window-icon=\"{options.IconPath}\"";
}
var typeArg = options.Urgency == NotificationUrgency.Critical ? "--error" : "--info";
var startInfo = new ProcessStartInfo
{
FileName = "zenity",
Arguments = $"{typeArg} {iconArg} --title=\"{EscapeArg(options.Title)}\" --text=\"{EscapeArg(options.Message)}\" --timeout=5",
UseShellExecute = false,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
await process.WaitForExitAsync();
}
}
catch
{
// Silently fail if no notification method available
}
}
/// <summary>
/// Checks if notifications are available on this system.
/// </summary>
public static bool IsAvailable()
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "which",
Arguments = "notify-send",
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return false;
process.WaitForExit();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
private static string EscapeArg(string arg)
{
return arg?.Replace("\\", "\\\\").Replace("\"", "\\\"") ?? "";
}
}
/// <summary>
/// Options for displaying a notification.
/// </summary>
public class NotificationOptions
{
public string Title { get; set; } = "";
public string Message { get; set; } = "";
public string? IconPath { get; set; }
public string? IconName { get; set; } // Standard icon name like "dialog-information"
public NotificationUrgency Urgency { get; set; } = NotificationUrgency.Normal;
public int ExpireTimeMs { get; set; } = 5000; // 5 seconds default
public string? Category { get; set; } // e.g., "email", "im", "transfer"
public bool IsTransient { get; set; }
public Dictionary<string, string>? Actions { get; set; }
}
/// <summary>
/// Notification urgency level.
/// </summary>
public enum NotificationUrgency
{
Low,
Normal,
Critical
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text.Json;
using Microsoft.Maui.Storage;
using MauiAppInfo = Microsoft.Maui.ApplicationModel.AppInfo;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux preferences implementation using JSON file storage.
/// Follows XDG Base Directory Specification.
/// </summary>
public class PreferencesService : IPreferences
{
private readonly string _preferencesPath;
private readonly object _lock = new();
private Dictionary<string, Dictionary<string, object?>> _preferences = new();
private bool _loaded;
public PreferencesService()
{
// Use XDG config directory
var configHome = Environment.GetEnvironmentVariable("XDG_CONFIG_HOME");
if (string.IsNullOrEmpty(configHome))
{
configHome = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".config");
}
var appName = MauiAppInfo.Current?.Name ?? "MauiApp";
var appDir = Path.Combine(configHome, appName);
Directory.CreateDirectory(appDir);
_preferencesPath = Path.Combine(appDir, "preferences.json");
}
private void EnsureLoaded()
{
if (_loaded) return;
lock (_lock)
{
if (_loaded) return;
try
{
if (File.Exists(_preferencesPath))
{
var json = File.ReadAllText(_preferencesPath);
_preferences = JsonSerializer.Deserialize<Dictionary<string, Dictionary<string, object?>>>(json)
?? new();
}
}
catch
{
_preferences = new();
}
_loaded = true;
}
}
private void Save()
{
lock (_lock)
{
try
{
var json = JsonSerializer.Serialize(_preferences, new JsonSerializerOptions
{
WriteIndented = true
});
File.WriteAllText(_preferencesPath, json);
}
catch
{
// Silently fail save operations
}
}
}
private Dictionary<string, object?> GetContainer(string? sharedName)
{
var key = sharedName ?? "__default__";
EnsureLoaded();
if (!_preferences.TryGetValue(key, out var container))
{
container = new Dictionary<string, object?>();
_preferences[key] = container;
}
return container;
}
public bool ContainsKey(string key, string? sharedName = null)
{
var container = GetContainer(sharedName);
return container.ContainsKey(key);
}
public void Remove(string key, string? sharedName = null)
{
lock (_lock)
{
var container = GetContainer(sharedName);
if (container.Remove(key))
{
Save();
}
}
}
public void Clear(string? sharedName = null)
{
lock (_lock)
{
var container = GetContainer(sharedName);
container.Clear();
Save();
}
}
public void Set<T>(string key, T value, string? sharedName = null)
{
lock (_lock)
{
var container = GetContainer(sharedName);
container[key] = value;
Save();
}
}
public T Get<T>(string key, T defaultValue, string? sharedName = null)
{
var container = GetContainer(sharedName);
if (!container.TryGetValue(key, out var value))
return defaultValue;
if (value == null)
return defaultValue;
try
{
// Handle JsonElement conversion (from deserialization)
if (value is JsonElement element)
{
return ConvertJsonElement<T>(element, defaultValue);
}
// Direct conversion
if (value is T typedValue)
return typedValue;
// Try Convert.ChangeType for primitive types
return (T)Convert.ChangeType(value, typeof(T));
}
catch
{
return defaultValue;
}
}
private T ConvertJsonElement<T>(JsonElement element, T defaultValue)
{
var targetType = typeof(T);
try
{
if (targetType == typeof(string))
return (T)(object)element.GetString()!;
if (targetType == typeof(int))
return (T)(object)element.GetInt32();
if (targetType == typeof(long))
return (T)(object)element.GetInt64();
if (targetType == typeof(float))
return (T)(object)element.GetSingle();
if (targetType == typeof(double))
return (T)(object)element.GetDouble();
if (targetType == typeof(bool))
return (T)(object)element.GetBoolean();
if (targetType == typeof(DateTime))
return (T)(object)element.GetDateTime();
// For complex types, deserialize
return element.Deserialize<T>() ?? defaultValue;
}
catch
{
return defaultValue;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using System.Security.Cryptography;
using System.Text;
using Microsoft.Maui.Storage;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux secure storage implementation using secret-tool (libsecret) or encrypted file fallback.
/// </summary>
public class SecureStorageService : ISecureStorage
{
private const string ServiceName = "maui-secure-storage";
private const string FallbackDirectory = ".maui-secure";
private readonly string _fallbackPath;
private readonly bool _useSecretService;
public SecureStorageService()
{
_fallbackPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
FallbackDirectory);
_useSecretService = CheckSecretServiceAvailable();
}
private bool CheckSecretServiceAvailable()
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "which",
Arguments = "secret-tool",
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return false;
process.WaitForExit();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
public Task<string?> GetAsync(string key)
{
if (string.IsNullOrEmpty(key))
throw new ArgumentNullException(nameof(key));
if (_useSecretService)
{
return GetFromSecretServiceAsync(key);
}
else
{
return GetFromFallbackAsync(key);
}
}
public Task SetAsync(string key, string value)
{
if (string.IsNullOrEmpty(key))
throw new ArgumentNullException(nameof(key));
if (_useSecretService)
{
return SetInSecretServiceAsync(key, value);
}
else
{
return SetInFallbackAsync(key, value);
}
}
public bool Remove(string key)
{
if (string.IsNullOrEmpty(key))
throw new ArgumentNullException(nameof(key));
if (_useSecretService)
{
return RemoveFromSecretService(key);
}
else
{
return RemoveFromFallback(key);
}
}
public void RemoveAll()
{
if (_useSecretService)
{
// Cannot easily remove all from secret service without knowing all keys
// This would require additional tracking
}
else
{
if (Directory.Exists(_fallbackPath))
{
Directory.Delete(_fallbackPath, true);
}
}
}
#region Secret Service (libsecret)
private async Task<string?> GetFromSecretServiceAsync(string key)
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "secret-tool",
Arguments = $"lookup service {ServiceName} key {EscapeArg(key)}",
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return null;
var output = await process.StandardOutput.ReadToEndAsync();
await process.WaitForExitAsync();
if (process.ExitCode == 0 && !string.IsNullOrEmpty(output))
{
return output.TrimEnd('\n');
}
return null;
}
catch
{
return null;
}
}
private async Task SetInSecretServiceAsync(string key, string value)
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "secret-tool",
Arguments = $"store --label=\"{EscapeArg(key)}\" service {ServiceName} key {EscapeArg(key)}",
UseShellExecute = false,
RedirectStandardInput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null)
throw new InvalidOperationException("Failed to start secret-tool");
await process.StandardInput.WriteAsync(value);
process.StandardInput.Close();
await process.WaitForExitAsync();
if (process.ExitCode != 0)
{
var error = await process.StandardError.ReadToEndAsync();
throw new InvalidOperationException($"Failed to store secret: {error}");
}
}
catch (Exception ex) when (ex is not InvalidOperationException)
{
// Fall back to file storage
await SetInFallbackAsync(key, value);
}
}
private bool RemoveFromSecretService(string key)
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "secret-tool",
Arguments = $"clear service {ServiceName} key {EscapeArg(key)}",
UseShellExecute = false,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return false;
process.WaitForExit();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
#endregion
#region Fallback Encrypted Storage
private async Task<string?> GetFromFallbackAsync(string key)
{
var filePath = GetFallbackFilePath(key);
if (!File.Exists(filePath))
return null;
try
{
var encryptedData = await File.ReadAllBytesAsync(filePath);
return DecryptData(encryptedData);
}
catch
{
return null;
}
}
private async Task SetInFallbackAsync(string key, string value)
{
EnsureFallbackDirectory();
var filePath = GetFallbackFilePath(key);
var encryptedData = EncryptData(value);
await File.WriteAllBytesAsync(filePath, encryptedData);
// Set restrictive permissions
File.SetUnixFileMode(filePath, UnixFileMode.UserRead | UnixFileMode.UserWrite);
}
private bool RemoveFromFallback(string key)
{
var filePath = GetFallbackFilePath(key);
if (File.Exists(filePath))
{
File.Delete(filePath);
return true;
}
return false;
}
private string GetFallbackFilePath(string key)
{
// Hash the key to create a safe filename
using var sha256 = SHA256.Create();
var hash = sha256.ComputeHash(Encoding.UTF8.GetBytes(key));
var fileName = Convert.ToHexString(hash).ToLowerInvariant();
return Path.Combine(_fallbackPath, fileName);
}
private void EnsureFallbackDirectory()
{
if (!Directory.Exists(_fallbackPath))
{
Directory.CreateDirectory(_fallbackPath);
// Set restrictive permissions on the directory
File.SetUnixFileMode(_fallbackPath,
UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute);
}
}
private byte[] EncryptData(string data)
{
// Use a machine-specific key derived from machine ID
var key = GetMachineKey();
using var aes = Aes.Create();
aes.Key = key;
aes.GenerateIV();
using var encryptor = aes.CreateEncryptor();
var plainBytes = Encoding.UTF8.GetBytes(data);
var encryptedBytes = encryptor.TransformFinalBlock(plainBytes, 0, plainBytes.Length);
// Prepend IV to encrypted data
var result = new byte[aes.IV.Length + encryptedBytes.Length];
Buffer.BlockCopy(aes.IV, 0, result, 0, aes.IV.Length);
Buffer.BlockCopy(encryptedBytes, 0, result, aes.IV.Length, encryptedBytes.Length);
return result;
}
private string DecryptData(byte[] encryptedData)
{
var key = GetMachineKey();
using var aes = Aes.Create();
aes.Key = key;
// Extract IV from beginning of data
var iv = new byte[aes.BlockSize / 8];
Buffer.BlockCopy(encryptedData, 0, iv, 0, iv.Length);
aes.IV = iv;
var cipherText = new byte[encryptedData.Length - iv.Length];
Buffer.BlockCopy(encryptedData, iv.Length, cipherText, 0, cipherText.Length);
using var decryptor = aes.CreateDecryptor();
var plainBytes = decryptor.TransformFinalBlock(cipherText, 0, cipherText.Length);
return Encoding.UTF8.GetString(plainBytes);
}
private byte[] GetMachineKey()
{
// Derive a key from machine-id and user
var machineId = GetMachineId();
var user = Environment.UserName;
var combined = $"{machineId}:{user}:{ServiceName}";
using var sha256 = SHA256.Create();
return sha256.ComputeHash(Encoding.UTF8.GetBytes(combined));
}
private string GetMachineId()
{
try
{
// Try /etc/machine-id first (systemd)
if (File.Exists("/etc/machine-id"))
{
return File.ReadAllText("/etc/machine-id").Trim();
}
// Try /var/lib/dbus/machine-id (older systems)
if (File.Exists("/var/lib/dbus/machine-id"))
{
return File.ReadAllText("/var/lib/dbus/machine-id").Trim();
}
// Fallback to hostname
return Environment.MachineName;
}
catch
{
return Environment.MachineName;
}
}
#endregion
private static string EscapeArg(string arg)
{
return arg.Replace("\"", "\\\"").Replace("'", "\\'");
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using Microsoft.Maui.ApplicationModel.DataTransfer;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux share implementation using xdg-open and portal APIs.
/// </summary>
public class ShareService : IShare
{
public async Task RequestAsync(ShareTextRequest request)
{
if (request == null)
throw new ArgumentNullException(nameof(request));
// On Linux, we can use mailto: for text sharing or write to a temp file
if (!string.IsNullOrEmpty(request.Uri))
{
// Share as URL
await OpenUrlAsync(request.Uri);
}
else if (!string.IsNullOrEmpty(request.Text))
{
// Try to use email for text sharing
var subject = Uri.EscapeDataString(request.Subject ?? "");
var body = Uri.EscapeDataString(request.Text ?? "");
var mailto = $"mailto:?subject={subject}&body={body}";
await OpenUrlAsync(mailto);
}
}
public async Task RequestAsync(ShareFileRequest request)
{
if (request == null)
throw new ArgumentNullException(nameof(request));
if (request.File == null)
throw new ArgumentException("File is required", nameof(request));
await ShareFileAsync(request.File.FullPath);
}
public async Task RequestAsync(ShareMultipleFilesRequest request)
{
if (request == null)
throw new ArgumentNullException(nameof(request));
if (request.Files == null || !request.Files.Any())
throw new ArgumentException("Files are required", nameof(request));
// Share files one by one or use file manager
foreach (var file in request.Files)
{
await ShareFileAsync(file.FullPath);
}
}
private async Task OpenUrlAsync(string url)
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "xdg-open",
Arguments = $"\"{url}\"",
UseShellExecute = false,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
await process.WaitForExitAsync();
}
}
catch (Exception ex)
{
throw new InvalidOperationException("Failed to open URL for sharing", ex);
}
}
private async Task ShareFileAsync(string filePath)
{
if (!File.Exists(filePath))
throw new FileNotFoundException("File not found for sharing", filePath);
try
{
// Try to use the portal API via gdbus for proper share dialog
var portalResult = await TryPortalShareAsync(filePath);
if (portalResult)
return;
// Fall back to opening with default file manager
var startInfo = new ProcessStartInfo
{
FileName = "xdg-open",
Arguments = $"\"{Path.GetDirectoryName(filePath)}\"",
UseShellExecute = false,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
await process.WaitForExitAsync();
}
}
catch (Exception ex)
{
throw new InvalidOperationException("Failed to share file", ex);
}
}
private async Task<bool> TryPortalShareAsync(string filePath)
{
try
{
// Try freedesktop portal for proper share dialog
// This would use org.freedesktop.portal.FileChooser or similar
// For now, we'll use zenity --info as a fallback notification
var startInfo = new ProcessStartInfo
{
FileName = "zenity",
Arguments = $"--info --text=\"File ready to share:\\n{Path.GetFileName(filePath)}\\n\\nPath: {filePath}\" --title=\"Share File\"",
UseShellExecute = false,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process != null)
{
await process.WaitForExitAsync();
return true;
}
return false;
}
catch
{
return false;
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux system tray service using various backends.
/// Supports yad, zenity, or native D-Bus StatusNotifierItem.
/// </summary>
public class SystemTrayService : IDisposable
{
private Process? _trayProcess;
private readonly string _appName;
private string? _iconPath;
private string? _tooltip;
private readonly List<TrayMenuItem> _menuItems = new();
private bool _isVisible;
private bool _disposed;
public event EventHandler? Clicked;
public event EventHandler<string>? MenuItemClicked;
public SystemTrayService(string appName)
{
_appName = appName;
}
/// <summary>
/// Gets or sets the tray icon path.
/// </summary>
public string? IconPath
{
get => _iconPath;
set
{
_iconPath = value;
if (_isVisible) UpdateTray();
}
}
/// <summary>
/// Gets or sets the tooltip text.
/// </summary>
public string? Tooltip
{
get => _tooltip;
set
{
_tooltip = value;
if (_isVisible) UpdateTray();
}
}
/// <summary>
/// Gets the menu items.
/// </summary>
public IList<TrayMenuItem> MenuItems => _menuItems;
/// <summary>
/// Shows the system tray icon.
/// </summary>
public async Task ShowAsync()
{
if (_isVisible) return;
// Try yad first (most feature-complete)
if (await TryYadTray())
{
_isVisible = true;
return;
}
// Fall back to a simple approach
_isVisible = true;
}
/// <summary>
/// Hides the system tray icon.
/// </summary>
public void Hide()
{
if (!_isVisible) return;
_trayProcess?.Kill();
_trayProcess?.Dispose();
_trayProcess = null;
_isVisible = false;
}
/// <summary>
/// Updates the tray icon and menu.
/// </summary>
public void UpdateTray()
{
if (!_isVisible) return;
// Restart tray with new settings
Hide();
_ = ShowAsync();
}
private async Task<bool> TryYadTray()
{
try
{
var args = BuildYadArgs();
var startInfo = new ProcessStartInfo
{
FileName = "yad",
Arguments = args,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
CreateNoWindow = true
};
_trayProcess = Process.Start(startInfo);
if (_trayProcess == null) return false;
// Start reading output for menu clicks
_ = Task.Run(async () =>
{
try
{
while (!_trayProcess.HasExited)
{
var line = await _trayProcess.StandardOutput.ReadLineAsync();
if (!string.IsNullOrEmpty(line))
{
HandleTrayOutput(line);
}
}
}
catch { }
});
return true;
}
catch
{
return false;
}
}
private string BuildYadArgs()
{
var args = new List<string>
{
"--notification",
"--listen"
};
if (!string.IsNullOrEmpty(_iconPath) && File.Exists(_iconPath))
{
args.Add($"--image=\"{_iconPath}\"");
}
else
{
args.Add("--image=application-x-executable");
}
if (!string.IsNullOrEmpty(_tooltip))
{
args.Add($"--text=\"{EscapeArg(_tooltip)}\"");
}
// Build menu
if (_menuItems.Count > 0)
{
var menuStr = string.Join("!", _menuItems.Select(m =>
m.IsSeparator ? "---" : $"{EscapeArg(m.Text)}"));
args.Add($"--menu=\"{menuStr}\"");
}
args.Add("--command=\"echo clicked\"");
return string.Join(" ", args);
}
private void HandleTrayOutput(string output)
{
if (output == "clicked")
{
Clicked?.Invoke(this, EventArgs.Empty);
}
else
{
// Menu item clicked
var menuItem = _menuItems.FirstOrDefault(m => m.Text == output);
if (menuItem != null)
{
menuItem.Action?.Invoke();
MenuItemClicked?.Invoke(this, output);
}
}
}
/// <summary>
/// Adds a menu item to the tray context menu.
/// </summary>
public void AddMenuItem(string text, Action? action = null)
{
_menuItems.Add(new TrayMenuItem { Text = text, Action = action });
}
/// <summary>
/// Adds a separator to the tray context menu.
/// </summary>
public void AddSeparator()
{
_menuItems.Add(new TrayMenuItem { IsSeparator = true });
}
/// <summary>
/// Clears all menu items.
/// </summary>
public void ClearMenuItems()
{
_menuItems.Clear();
}
/// <summary>
/// Checks if system tray is available on this system.
/// </summary>
public static bool IsAvailable()
{
try
{
var startInfo = new ProcessStartInfo
{
FileName = "which",
Arguments = "yad",
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = true
};
using var process = Process.Start(startInfo);
if (process == null) return false;
process.WaitForExit();
return process.ExitCode == 0;
}
catch
{
return false;
}
}
private static string EscapeArg(string arg)
{
return arg?.Replace("\\", "\\\\").Replace("\"", "\\\"").Replace("!", "\\!") ?? "";
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
Hide();
GC.SuppressFinalize(this);
}
~SystemTrayService()
{
Dispose();
}
}
/// <summary>
/// Represents a tray menu item.
/// </summary>
public class TrayMenuItem
{
public string Text { get; set; } = "";
public Action? Action { get; set; }
public bool IsSeparator { get; set; }
public bool IsEnabled { get; set; } = true;
public string? IconPath { get; set; }
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Reflection;
using System.Text.Json;
using Microsoft.Maui.ApplicationModel;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// Linux version tracking implementation.
/// </summary>
public class VersionTrackingService : IVersionTracking
{
private const string VersionTrackingFile = ".maui-version-tracking.json";
private readonly string _trackingFilePath;
private VersionTrackingData _data;
private bool _isInitialized;
public VersionTrackingService()
{
_trackingFilePath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
VersionTrackingFile);
_data = new VersionTrackingData();
}
private void EnsureInitialized()
{
if (_isInitialized) return;
_isInitialized = true;
LoadTrackingData();
UpdateTrackingData();
}
private void LoadTrackingData()
{
try
{
if (File.Exists(_trackingFilePath))
{
var json = File.ReadAllText(_trackingFilePath);
_data = JsonSerializer.Deserialize<VersionTrackingData>(json) ?? new VersionTrackingData();
}
}
catch
{
_data = new VersionTrackingData();
}
}
private void UpdateTrackingData()
{
var currentVersion = CurrentVersion;
var currentBuild = CurrentBuild;
// Check if this is a new version
if (_data.PreviousVersion != currentVersion || _data.PreviousBuild != currentBuild)
{
// Store previous version info
if (!string.IsNullOrEmpty(_data.CurrentVersion))
{
_data.PreviousVersion = _data.CurrentVersion;
_data.PreviousBuild = _data.CurrentBuild;
}
_data.CurrentVersion = currentVersion;
_data.CurrentBuild = currentBuild;
// Add to version history
if (!_data.VersionHistory.Contains(currentVersion))
{
_data.VersionHistory.Add(currentVersion);
}
// Add to build history
if (!_data.BuildHistory.Contains(currentBuild))
{
_data.BuildHistory.Add(currentBuild);
}
}
// Track first launch
if (_data.FirstInstalledVersion == null)
{
_data.FirstInstalledVersion = currentVersion;
_data.FirstInstalledBuild = currentBuild;
_data.IsFirstLaunchEver = true;
}
else
{
_data.IsFirstLaunchEver = false;
}
// Check if first launch for current version
_data.IsFirstLaunchForCurrentVersion = _data.PreviousVersion != currentVersion;
_data.IsFirstLaunchForCurrentBuild = _data.PreviousBuild != currentBuild;
SaveTrackingData();
}
private void SaveTrackingData()
{
try
{
var directory = Path.GetDirectoryName(_trackingFilePath);
if (!string.IsNullOrEmpty(directory) && !Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
var json = JsonSerializer.Serialize(_data, new JsonSerializerOptions { WriteIndented = true });
File.WriteAllText(_trackingFilePath, json);
}
catch
{
// Silently fail if we can't save
}
}
public bool IsFirstLaunchEver
{
get
{
EnsureInitialized();
return _data.IsFirstLaunchEver;
}
}
public bool IsFirstLaunchForCurrentVersion
{
get
{
EnsureInitialized();
return _data.IsFirstLaunchForCurrentVersion;
}
}
public bool IsFirstLaunchForCurrentBuild
{
get
{
EnsureInitialized();
return _data.IsFirstLaunchForCurrentBuild;
}
}
public string CurrentVersion => GetAssemblyVersion();
public string CurrentBuild => GetAssemblyBuild();
public string? PreviousVersion
{
get
{
EnsureInitialized();
return _data.PreviousVersion;
}
}
public string? PreviousBuild
{
get
{
EnsureInitialized();
return _data.PreviousBuild;
}
}
public string? FirstInstalledVersion
{
get
{
EnsureInitialized();
return _data.FirstInstalledVersion;
}
}
public string? FirstInstalledBuild
{
get
{
EnsureInitialized();
return _data.FirstInstalledBuild;
}
}
public IReadOnlyList<string> VersionHistory
{
get
{
EnsureInitialized();
return _data.VersionHistory.AsReadOnly();
}
}
public IReadOnlyList<string> BuildHistory
{
get
{
EnsureInitialized();
return _data.BuildHistory.AsReadOnly();
}
}
public bool IsFirstLaunchForVersion(string version)
{
EnsureInitialized();
return !_data.VersionHistory.Contains(version);
}
public bool IsFirstLaunchForBuild(string build)
{
EnsureInitialized();
return !_data.BuildHistory.Contains(build);
}
public void Track()
{
EnsureInitialized();
}
private static string GetAssemblyVersion()
{
var assembly = Assembly.GetEntryAssembly() ?? Assembly.GetExecutingAssembly();
var version = assembly.GetName().Version;
return version != null ? $"{version.Major}.{version.Minor}.{version.Build}" : "1.0.0";
}
private static string GetAssemblyBuild()
{
var assembly = Assembly.GetEntryAssembly() ?? Assembly.GetExecutingAssembly();
var version = assembly.GetName().Version;
return version?.Revision.ToString() ?? "0";
}
private class VersionTrackingData
{
public string? CurrentVersion { get; set; }
public string? CurrentBuild { get; set; }
public string? PreviousVersion { get; set; }
public string? PreviousBuild { get; set; }
public string? FirstInstalledVersion { get; set; }
public string? FirstInstalledBuild { get; set; }
public List<string> VersionHistory { get; set; } = new();
public List<string> BuildHistory { get; set; } = new();
public bool IsFirstLaunchEver { get; set; }
public bool IsFirstLaunchForCurrentVersion { get; set; }
public bool IsFirstLaunchForCurrentBuild { get; set; }
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Runtime.InteropServices;
using System.Text;
namespace Microsoft.Maui.Platform.Linux.Services;
/// <summary>
/// X11 Input Method service using XIM protocol.
/// Provides IME support for CJK and other complex input methods.
/// </summary>
public class X11InputMethodService : IInputMethodService, IDisposable
{
private nint _display;
private nint _window;
private nint _xim;
private nint _xic;
private IInputContext? _currentContext;
private string _preEditText = string.Empty;
private int _preEditCursorPosition;
private bool _isActive;
private bool _disposed;
// XIM callback delegates (prevent GC)
private XIMProc? _preeditStartCallback;
private XIMProc? _preeditDoneCallback;
private XIMProc? _preeditDrawCallback;
private XIMProc? _preeditCaretCallback;
private XIMProc? _commitCallback;
public bool IsActive => _isActive;
public string PreEditText => _preEditText;
public int PreEditCursorPosition => _preEditCursorPosition;
public event EventHandler<TextCommittedEventArgs>? TextCommitted;
public event EventHandler<PreEditChangedEventArgs>? PreEditChanged;
public event EventHandler? PreEditEnded;
public void Initialize(nint windowHandle)
{
_window = windowHandle;
// Get display from X11 interop
_display = XOpenDisplay(IntPtr.Zero);
if (_display == IntPtr.Zero)
{
Console.WriteLine("X11InputMethodService: Failed to open display");
return;
}
// Set locale for proper IME operation
if (XSetLocaleModifiers("") == IntPtr.Zero)
{
XSetLocaleModifiers("@im=none");
}
// Open input method
_xim = XOpenIM(_display, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
if (_xim == IntPtr.Zero)
{
Console.WriteLine("X11InputMethodService: No input method available, trying IBus...");
TryIBusFallback();
return;
}
CreateInputContext();
}
private void CreateInputContext()
{
if (_xim == IntPtr.Zero || _window == IntPtr.Zero) return;
// Create input context with preedit callbacks
var preeditAttr = CreatePreeditAttributes();
_xic = XCreateIC(_xim,
XNClientWindow, _window,
XNFocusWindow, _window,
XNInputStyle, XIMPreeditCallbacks | XIMStatusNothing,
XNPreeditAttributes, preeditAttr,
IntPtr.Zero);
if (preeditAttr != IntPtr.Zero)
{
XFree(preeditAttr);
}
if (_xic == IntPtr.Zero)
{
// Fallback to simpler input style
_xic = XCreateICSimple(_xim,
XNClientWindow, _window,
XNFocusWindow, _window,
XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
IntPtr.Zero);
}
if (_xic != IntPtr.Zero)
{
Console.WriteLine("X11InputMethodService: Input context created successfully");
}
}
private nint CreatePreeditAttributes()
{
// Set up preedit callbacks for on-the-spot composition
_preeditStartCallback = PreeditStartCallback;
_preeditDoneCallback = PreeditDoneCallback;
_preeditDrawCallback = PreeditDrawCallback;
_preeditCaretCallback = PreeditCaretCallback;
// Create callback structures
// Note: Actual implementation would marshal XIMCallback structures
return IntPtr.Zero;
}
private int PreeditStartCallback(nint xic, nint clientData, nint callData)
{
_isActive = true;
_preEditText = string.Empty;
_preEditCursorPosition = 0;
return -1; // No length limit
}
private int PreeditDoneCallback(nint xic, nint clientData, nint callData)
{
_isActive = false;
_preEditText = string.Empty;
_preEditCursorPosition = 0;
PreEditEnded?.Invoke(this, EventArgs.Empty);
_currentContext?.OnPreEditEnded();
return 0;
}
private int PreeditDrawCallback(nint xic, nint clientData, nint callData)
{
// Parse XIMPreeditDrawCallbackStruct
// Update preedit text and cursor position
// This would involve marshaling the callback data structure
PreEditChanged?.Invoke(this, new PreEditChangedEventArgs(_preEditText, _preEditCursorPosition));
_currentContext?.OnPreEditChanged(_preEditText, _preEditCursorPosition);
return 0;
}
private int PreeditCaretCallback(nint xic, nint clientData, nint callData)
{
// Handle caret movement in preedit text
return 0;
}
private void TryIBusFallback()
{
// Try to connect to IBus via D-Bus
// This provides a more modern IME interface
Console.WriteLine("X11InputMethodService: IBus fallback not yet implemented");
}
public void SetFocus(IInputContext? context)
{
_currentContext = context;
if (_xic != IntPtr.Zero)
{
if (context != null)
{
XSetICFocus(_xic);
}
else
{
XUnsetICFocus(_xic);
}
}
}
public void SetCursorLocation(int x, int y, int width, int height)
{
if (_xic == IntPtr.Zero) return;
// Set the spot location for candidate window positioning
var spotLocation = new XPoint { x = (short)x, y = (short)y };
var attr = XVaCreateNestedList(0,
XNSpotLocation, ref spotLocation,
IntPtr.Zero);
if (attr != IntPtr.Zero)
{
XSetICValues(_xic, XNPreeditAttributes, attr, IntPtr.Zero);
XFree(attr);
}
}
public bool ProcessKeyEvent(uint keyCode, KeyModifiers modifiers, bool isKeyDown)
{
if (_xic == IntPtr.Zero) return false;
// Convert to X11 key event
var xEvent = new XKeyEvent
{
type = isKeyDown ? KeyPress : KeyRelease,
display = _display,
window = _window,
state = ConvertModifiers(modifiers),
keycode = keyCode
};
// Filter through XIM
if (XFilterEvent(ref xEvent, _window))
{
return true; // Event consumed by IME
}
// If not filtered and key down, try to get committed text
if (isKeyDown)
{
var buffer = new byte[64];
var keySym = IntPtr.Zero;
var status = IntPtr.Zero;
int len = Xutf8LookupString(_xic, ref xEvent, buffer, buffer.Length, ref keySym, ref status);
if (len > 0)
{
string text = Encoding.UTF8.GetString(buffer, 0, len);
OnTextCommit(text);
return true;
}
}
return false;
}
private void OnTextCommit(string text)
{
_preEditText = string.Empty;
_preEditCursorPosition = 0;
TextCommitted?.Invoke(this, new TextCommittedEventArgs(text));
_currentContext?.OnTextCommitted(text);
}
private uint ConvertModifiers(KeyModifiers modifiers)
{
uint state = 0;
if (modifiers.HasFlag(KeyModifiers.Shift)) state |= ShiftMask;
if (modifiers.HasFlag(KeyModifiers.Control)) state |= ControlMask;
if (modifiers.HasFlag(KeyModifiers.Alt)) state |= Mod1Mask;
if (modifiers.HasFlag(KeyModifiers.Super)) state |= Mod4Mask;
if (modifiers.HasFlag(KeyModifiers.CapsLock)) state |= LockMask;
if (modifiers.HasFlag(KeyModifiers.NumLock)) state |= Mod2Mask;
return state;
}
public void Reset()
{
if (_xic != IntPtr.Zero)
{
XmbResetIC(_xic);
}
_preEditText = string.Empty;
_preEditCursorPosition = 0;
_isActive = false;
PreEditEnded?.Invoke(this, EventArgs.Empty);
_currentContext?.OnPreEditEnded();
}
public void Shutdown()
{
Dispose();
}
public void Dispose()
{
if (_disposed) return;
_disposed = true;
if (_xic != IntPtr.Zero)
{
XDestroyIC(_xic);
_xic = IntPtr.Zero;
}
if (_xim != IntPtr.Zero)
{
XCloseIM(_xim);
_xim = IntPtr.Zero;
}
// Note: Don't close display here if shared with window
}
#region X11 Interop
private const int KeyPress = 2;
private const int KeyRelease = 3;
private const uint ShiftMask = 1 << 0;
private const uint LockMask = 1 << 1;
private const uint ControlMask = 1 << 2;
private const uint Mod1Mask = 1 << 3; // Alt
private const uint Mod2Mask = 1 << 4; // NumLock
private const uint Mod4Mask = 1 << 6; // Super
private const long XIMPreeditNothing = 0x0008L;
private const long XIMPreeditCallbacks = 0x0002L;
private const long XIMStatusNothing = 0x0400L;
private static readonly nint XNClientWindow = Marshal.StringToHGlobalAnsi("clientWindow");
private static readonly nint XNFocusWindow = Marshal.StringToHGlobalAnsi("focusWindow");
private static readonly nint XNInputStyle = Marshal.StringToHGlobalAnsi("inputStyle");
private static readonly nint XNPreeditAttributes = Marshal.StringToHGlobalAnsi("preeditAttributes");
private static readonly nint XNSpotLocation = Marshal.StringToHGlobalAnsi("spotLocation");
private delegate int XIMProc(nint xic, nint clientData, nint callData);
[StructLayout(LayoutKind.Sequential)]
private struct XPoint
{
public short x;
public short y;
}
[StructLayout(LayoutKind.Sequential)]
private struct XKeyEvent
{
public int type;
public ulong serial;
public bool send_event;
public nint display;
public nint window;
public nint root;
public nint subwindow;
public ulong time;
public int x, y;
public int x_root, y_root;
public uint state;
public uint keycode;
public bool same_screen;
}
[DllImport("libX11.so.6")]
private static extern nint XOpenDisplay(nint display);
[DllImport("libX11.so.6")]
private static extern nint XSetLocaleModifiers(string modifiers);
[DllImport("libX11.so.6")]
private static extern nint XOpenIM(nint display, nint db, nint res_name, nint res_class);
[DllImport("libX11.so.6")]
private static extern void XCloseIM(nint xim);
[DllImport("libX11.so.6", EntryPoint = "XCreateIC")]
private static extern nint XCreateIC(nint xim, nint name1, nint value1, nint name2, nint value2,
nint name3, long value3, nint name4, nint value4, nint terminator);
[DllImport("libX11.so.6", EntryPoint = "XCreateIC")]
private static extern nint XCreateICSimple(nint xim, nint name1, nint value1, nint name2, nint value2,
nint name3, long value3, nint terminator);
[DllImport("libX11.so.6")]
private static extern void XDestroyIC(nint xic);
[DllImport("libX11.so.6")]
private static extern void XSetICFocus(nint xic);
[DllImport("libX11.so.6")]
private static extern void XUnsetICFocus(nint xic);
[DllImport("libX11.so.6")]
private static extern nint XSetICValues(nint xic, nint name, nint value, nint terminator);
[DllImport("libX11.so.6")]
private static extern nint XVaCreateNestedList(int unused, nint name, ref XPoint value, nint terminator);
[DllImport("libX11.so.6")]
private static extern bool XFilterEvent(ref XKeyEvent xevent, nint window);
[DllImport("libX11.so.6")]
private static extern int Xutf8LookupString(nint xic, ref XKeyEvent xevent,
byte[] buffer, int bytes, ref nint keySym, ref nint status);
[DllImport("libX11.so.6")]
private static extern nint XmbResetIC(nint xic);
[DllImport("libX11.so.6")]
private static extern void XFree(nint ptr);
#endregion
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered activity indicator (spinner) control.
/// </summary>
public class SkiaActivityIndicator : SkiaView
{
private bool _isRunning;
private float _rotationAngle;
private DateTime _lastUpdateTime = DateTime.UtcNow;
public bool IsRunning
{
get => _isRunning;
set
{
if (_isRunning != value)
{
_isRunning = value;
if (value)
{
_lastUpdateTime = DateTime.UtcNow;
}
Invalidate();
}
}
}
public SKColor Color { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public SKColor DisabledColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public float Size { get; set; } = 32;
public float StrokeWidth { get; set; } = 3;
public float RotationSpeed { get; set; } = 360; // Degrees per second
public int ArcCount { get; set; } = 12;
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
if (!IsRunning && !IsEnabled)
{
return;
}
var centerX = bounds.MidX;
var centerY = bounds.MidY;
var radius = Math.Min(Size / 2, Math.Min(bounds.Width, bounds.Height) / 2) - StrokeWidth;
// Update rotation
if (IsRunning)
{
var now = DateTime.UtcNow;
var elapsed = (now - _lastUpdateTime).TotalSeconds;
_lastUpdateTime = now;
_rotationAngle = (_rotationAngle + (float)(RotationSpeed * elapsed)) % 360;
}
canvas.Save();
canvas.Translate(centerX, centerY);
canvas.RotateDegrees(_rotationAngle);
var color = IsEnabled ? Color : DisabledColor;
// Draw arcs with varying opacity
for (int i = 0; i < ArcCount; i++)
{
var alpha = (byte)(255 * (1 - (float)i / ArcCount));
var arcColor = color.WithAlpha(alpha);
using var paint = new SKPaint
{
Color = arcColor,
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = StrokeWidth,
StrokeCap = SKStrokeCap.Round
};
var startAngle = (360f / ArcCount) * i;
var sweepAngle = 360f / ArcCount / 2;
using var path = new SKPath();
path.AddArc(
new SKRect(-radius, -radius, radius, radius),
startAngle,
sweepAngle);
canvas.DrawPath(path, paint);
}
canvas.Restore();
// Request redraw for animation
if (IsRunning)
{
Invalidate();
}
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
return new SKSize(Size + StrokeWidth * 2, Size + StrokeWidth * 2);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered border/frame container control.
/// </summary>
public class SkiaBorder : SkiaLayoutView
{
private float _strokeThickness = 1;
private float _cornerRadius = 0;
private SKColor _stroke = SKColors.Black;
private float _paddingLeft = 0;
private float _paddingTop = 0;
private float _paddingRight = 0;
private float _paddingBottom = 0;
private bool _hasShadow;
public float StrokeThickness
{
get => _strokeThickness;
set { _strokeThickness = value; Invalidate(); }
}
public float CornerRadius
{
get => _cornerRadius;
set { _cornerRadius = value; Invalidate(); }
}
public SKColor Stroke
{
get => _stroke;
set { _stroke = value; Invalidate(); }
}
public float PaddingLeft
{
get => _paddingLeft;
set { _paddingLeft = value; InvalidateMeasure(); }
}
public float PaddingTop
{
get => _paddingTop;
set { _paddingTop = value; InvalidateMeasure(); }
}
public float PaddingRight
{
get => _paddingRight;
set { _paddingRight = value; InvalidateMeasure(); }
}
public float PaddingBottom
{
get => _paddingBottom;
set { _paddingBottom = value; InvalidateMeasure(); }
}
public bool HasShadow
{
get => _hasShadow;
set { _hasShadow = value; Invalidate(); }
}
public void SetPadding(float all)
{
_paddingLeft = _paddingTop = _paddingRight = _paddingBottom = all;
InvalidateMeasure();
}
public void SetPadding(float horizontal, float vertical)
{
_paddingLeft = _paddingRight = horizontal;
_paddingTop = _paddingBottom = vertical;
InvalidateMeasure();
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
var borderRect = new SKRect(
bounds.Left + _strokeThickness / 2,
bounds.Top + _strokeThickness / 2,
bounds.Right - _strokeThickness / 2,
bounds.Bottom - _strokeThickness / 2);
// Draw shadow if enabled
if (_hasShadow)
{
using var shadowPaint = new SKPaint
{
Color = new SKColor(0, 0, 0, 40),
MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 4),
Style = SKPaintStyle.Fill
};
var shadowRect = new SKRect(borderRect.Left + 2, borderRect.Top + 2, borderRect.Right + 2, borderRect.Bottom + 2);
canvas.DrawRoundRect(new SKRoundRect(shadowRect, _cornerRadius), shadowPaint);
}
// Draw background
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(borderRect, _cornerRadius), bgPaint);
// Draw border
if (_strokeThickness > 0)
{
using var borderPaint = new SKPaint
{
Color = _stroke,
Style = SKPaintStyle.Stroke,
StrokeWidth = _strokeThickness,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(borderRect, _cornerRadius), borderPaint);
}
// Draw children (call base which draws children)
foreach (var child in Children)
{
if (child.IsVisible)
{
child.Draw(canvas);
}
}
}
protected override SKRect GetContentBounds()
{
return GetContentBounds(Bounds);
}
protected new SKRect GetContentBounds(SKRect bounds)
{
return new SKRect(
bounds.Left + _paddingLeft + _strokeThickness,
bounds.Top + _paddingTop + _strokeThickness,
bounds.Right - _paddingRight - _strokeThickness,
bounds.Bottom - _paddingBottom - _strokeThickness);
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
var paddingWidth = _paddingLeft + _paddingRight + _strokeThickness * 2;
var paddingHeight = _paddingTop + _paddingBottom + _strokeThickness * 2;
var childAvailable = new SKSize(
availableSize.Width - paddingWidth,
availableSize.Height - paddingHeight);
var maxChildSize = SKSize.Empty;
foreach (var child in Children)
{
var childSize = child.Measure(childAvailable);
maxChildSize = new SKSize(
Math.Max(maxChildSize.Width, childSize.Width),
Math.Max(maxChildSize.Height, childSize.Height));
}
return new SKSize(
maxChildSize.Width + paddingWidth,
maxChildSize.Height + paddingHeight);
}
protected override SKRect ArrangeOverride(SKRect bounds)
{
var contentBounds = GetContentBounds(bounds);
foreach (var child in Children)
{
child.Arrange(contentBounds);
}
return bounds;
}
}
/// <summary>
/// Frame control (alias for Border with shadow enabled).
/// </summary>
public class SkiaFrame : SkiaBorder
{
public SkiaFrame()
{
HasShadow = true;
CornerRadius = 4;
SetPadding(10);
BackgroundColor = SKColors.White;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Platform.Linux.Rendering;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered button control.
/// </summary>
public class SkiaButton : SkiaView
{
public string Text { get; set; } = "";
public SKColor TextColor { get; set; } = SKColors.White;
public new SKColor BackgroundColor { get; set; } = new SKColor(0x21, 0x96, 0xF3); // Material Blue
public SKColor PressedBackgroundColor { get; set; } = new SKColor(0x19, 0x76, 0xD2);
public SKColor DisabledBackgroundColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public SKColor HoveredBackgroundColor { get; set; } = new SKColor(0x42, 0xA5, 0xF5);
public SKColor BorderColor { get; set; } = SKColors.Transparent;
public string FontFamily { get; set; } = "Sans";
public float FontSize { get; set; } = 14;
public bool IsBold { get; set; }
public bool IsItalic { get; set; }
public float CharacterSpacing { get; set; }
public float CornerRadius { get; set; } = 4;
public float BorderWidth { get; set; } = 0;
public SKRect Padding { get; set; } = new SKRect(16, 8, 16, 8);
public bool IsPressed { get; private set; }
public bool IsHovered { get; private set; }
private bool _focusFromKeyboard;
public event EventHandler? Clicked;
public event EventHandler? Pressed;
public event EventHandler? Released;
public SkiaButton()
{
IsFocusable = true;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Determine background color based on state
var bgColor = !IsEnabled ? DisabledBackgroundColor
: IsPressed ? PressedBackgroundColor
: IsHovered ? HoveredBackgroundColor
: BackgroundColor;
// Draw shadow (for elevation effect)
if (IsEnabled && !IsPressed)
{
DrawShadow(canvas, bounds);
}
// Draw background with rounded corners
using var bgPaint = new SKPaint
{
Color = bgColor,
IsAntialias = true,
Style = SKPaintStyle.Fill
};
var rect = new SKRoundRect(bounds, CornerRadius);
canvas.DrawRoundRect(rect, bgPaint);
// Draw border
if (BorderWidth > 0 && BorderColor != SKColors.Transparent)
{
using var borderPaint = new SKPaint
{
Color = BorderColor,
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = BorderWidth
};
canvas.DrawRoundRect(rect, borderPaint);
}
// Draw focus ring only for keyboard focus
if (IsFocused && _focusFromKeyboard)
{
using var focusPaint = new SKPaint
{
Color = new SKColor(0x21, 0x96, 0xF3, 0x80),
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = 2
};
var focusRect = new SKRoundRect(bounds, CornerRadius + 2);
focusRect.Inflate(2, 2);
canvas.DrawRoundRect(focusRect, focusPaint);
}
// Draw text
if (!string.IsNullOrEmpty(Text))
{
var fontStyle = new SKFontStyle(
IsBold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal,
SKFontStyleWidth.Normal,
IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font)
{
Color = IsEnabled ? TextColor : TextColor.WithAlpha(128),
IsAntialias = true
};
// Measure text
var textBounds = new SKRect();
paint.MeasureText(Text, ref textBounds);
// Center text
var x = bounds.MidX - textBounds.MidX;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(Text, x, y, paint);
}
}
private void DrawShadow(SKCanvas canvas, SKRect bounds)
{
using var shadowPaint = new SKPaint
{
Color = new SKColor(0, 0, 0, 50),
IsAntialias = true,
MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 4)
};
var shadowRect = new SKRect(
bounds.Left + 2,
bounds.Top + 4,
bounds.Right + 2,
bounds.Bottom + 4);
var roundRect = new SKRoundRect(shadowRect, CornerRadius);
canvas.DrawRoundRect(roundRect, shadowPaint);
}
public override void OnPointerEntered(PointerEventArgs e)
{
if (!IsEnabled) return;
IsHovered = true;
Invalidate();
}
public override void OnPointerExited(PointerEventArgs e)
{
IsHovered = false;
if (IsPressed)
{
IsPressed = false;
}
Invalidate();
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
IsPressed = true;
_focusFromKeyboard = false;
Invalidate();
Pressed?.Invoke(this, EventArgs.Empty);
}
public override void OnPointerReleased(PointerEventArgs e)
{
if (!IsEnabled) return;
var wasPressed = IsPressed;
IsPressed = false;
Invalidate();
Released?.Invoke(this, EventArgs.Empty);
// Fire click if released within bounds
if (wasPressed && Bounds.Contains(new SKPoint(e.X, e.Y)))
{
Clicked?.Invoke(this, EventArgs.Empty);
}
}
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
// Activate on Enter or Space
if (e.Key == Key.Enter || e.Key == Key.Space)
{
IsPressed = true;
_focusFromKeyboard = true;
Invalidate();
Pressed?.Invoke(this, EventArgs.Empty);
e.Handled = true;
}
}
public override void OnKeyUp(KeyEventArgs e)
{
if (!IsEnabled) return;
if (e.Key == Key.Enter || e.Key == Key.Space)
{
if (IsPressed)
{
IsPressed = false;
Invalidate();
Released?.Invoke(this, EventArgs.Empty);
Clicked?.Invoke(this, EventArgs.Empty);
}
e.Handled = true;
}
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
if (string.IsNullOrEmpty(Text))
{
return new SKSize(
Padding.Left + Padding.Right + 40, // Minimum width
Padding.Top + Padding.Bottom + FontSize);
}
var fontStyle = new SKFontStyle(
IsBold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal,
SKFontStyleWidth.Normal,
IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font);
var textBounds = new SKRect();
paint.MeasureText(Text, ref textBounds);
return new SKSize(
textBounds.Width + Padding.Left + Padding.Right,
textBounds.Height + Padding.Top + Padding.Bottom);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// A horizontally scrolling carousel view with snap-to-item behavior.
/// </summary>
public class SkiaCarouselView : SkiaLayoutView
{
private readonly List<SkiaView> _items = new();
private int _currentPosition = 0;
private float _scrollOffset = 0f;
private float _targetScrollOffset = 0f;
private bool _isDragging = false;
private float _dragStartX;
private float _dragStartOffset;
private float _velocity = 0f;
private DateTime _lastDragTime;
private float _lastDragX;
// Animation
private bool _isAnimating = false;
private float _animationStartOffset;
private float _animationTargetOffset;
private DateTime _animationStartTime;
private const float AnimationDurationMs = 300f;
/// <summary>
/// Gets or sets the current position (item index).
/// </summary>
public int Position
{
get => _currentPosition;
set
{
if (value >= 0 && value < _items.Count && value != _currentPosition)
{
int oldPosition = _currentPosition;
_currentPosition = value;
AnimateToPosition(value);
PositionChanged?.Invoke(this, new PositionChangedEventArgs(oldPosition, value));
}
}
}
/// <summary>
/// Gets the item count.
/// </summary>
public int ItemCount => _items.Count;
/// <summary>
/// Gets or sets whether looping is enabled.
/// </summary>
public bool Loop { get; set; } = false;
/// <summary>
/// Gets or sets the peek amount (how much of adjacent items to show).
/// </summary>
public float PeekAreaInsets { get; set; } = 0f;
/// <summary>
/// Gets or sets the spacing between items.
/// </summary>
public float ItemSpacing { get; set; } = 0f;
/// <summary>
/// Gets or sets whether swipe gestures are enabled.
/// </summary>
public bool IsSwipeEnabled { get; set; } = true;
/// <summary>
/// Gets or sets the indicator visibility.
/// </summary>
public bool ShowIndicators { get; set; } = true;
/// <summary>
/// Gets or sets the indicator color.
/// </summary>
public SKColor IndicatorColor { get; set; } = new SKColor(180, 180, 180);
/// <summary>
/// Gets or sets the selected indicator color.
/// </summary>
public SKColor SelectedIndicatorColor { get; set; } = new SKColor(33, 150, 243);
/// <summary>
/// Event raised when position changes.
/// </summary>
public event EventHandler<PositionChangedEventArgs>? PositionChanged;
/// <summary>
/// Event raised when scrolling.
/// </summary>
public event EventHandler? Scrolled;
/// <summary>
/// Adds an item to the carousel.
/// </summary>
public void AddItem(SkiaView item)
{
_items.Add(item);
AddChild(item);
InvalidateMeasure();
Invalidate();
}
/// <summary>
/// Removes an item from the carousel.
/// </summary>
public void RemoveItem(SkiaView item)
{
if (_items.Remove(item))
{
RemoveChild(item);
if (_currentPosition >= _items.Count)
{
_currentPosition = Math.Max(0, _items.Count - 1);
}
InvalidateMeasure();
Invalidate();
}
}
/// <summary>
/// Clears all items.
/// </summary>
public void ClearItems()
{
foreach (var item in _items)
{
RemoveChild(item);
}
_items.Clear();
_currentPosition = 0;
_scrollOffset = 0;
_targetScrollOffset = 0;
InvalidateMeasure();
Invalidate();
}
/// <summary>
/// Scrolls to the specified position.
/// </summary>
public void ScrollTo(int position, bool animate = true)
{
if (position < 0 || position >= _items.Count) return;
int oldPosition = _currentPosition;
_currentPosition = position;
if (animate)
{
AnimateToPosition(position);
}
else
{
_scrollOffset = GetOffsetForPosition(position);
_targetScrollOffset = _scrollOffset;
Invalidate();
}
if (oldPosition != position)
{
PositionChanged?.Invoke(this, new PositionChangedEventArgs(oldPosition, position));
}
}
private void AnimateToPosition(int position)
{
_animationStartOffset = _scrollOffset;
_animationTargetOffset = GetOffsetForPosition(position);
_animationStartTime = DateTime.UtcNow;
_isAnimating = true;
Invalidate();
}
private float GetOffsetForPosition(int position)
{
float itemWidth = Bounds.Width - PeekAreaInsets * 2;
return position * (itemWidth + ItemSpacing);
}
private int GetPositionForOffset(float offset)
{
float itemWidth = Bounds.Width - PeekAreaInsets * 2;
if (itemWidth <= 0) return 0;
return Math.Clamp((int)Math.Round(offset / (itemWidth + ItemSpacing)), 0, Math.Max(0, _items.Count - 1));
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
float itemWidth = availableSize.Width - PeekAreaInsets * 2;
float itemHeight = availableSize.Height - (ShowIndicators ? 30 : 0);
foreach (var item in _items)
{
item.Measure(new SKSize(itemWidth, itemHeight));
}
return availableSize;
}
protected override SKRect ArrangeOverride(SKRect bounds)
{
float itemWidth = bounds.Width - PeekAreaInsets * 2;
float itemHeight = bounds.Height - (ShowIndicators ? 30 : 0);
for (int i = 0; i < _items.Count; i++)
{
float x = bounds.Left + PeekAreaInsets + i * (itemWidth + ItemSpacing) - _scrollOffset;
var itemBounds = new SKRect(x, bounds.Top, x + itemWidth, bounds.Top + itemHeight);
_items[i].Arrange(itemBounds);
}
return bounds;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Update animation
if (_isAnimating)
{
float elapsed = (float)(DateTime.UtcNow - _animationStartTime).TotalMilliseconds;
float progress = Math.Clamp(elapsed / AnimationDurationMs, 0f, 1f);
// Ease out cubic
float t = 1f - (1f - progress) * (1f - progress) * (1f - progress);
_scrollOffset = _animationStartOffset + (_animationTargetOffset - _animationStartOffset) * t;
if (progress >= 1f)
{
_isAnimating = false;
_scrollOffset = _animationTargetOffset;
}
else
{
Invalidate(); // Continue animation
}
}
canvas.Save();
canvas.ClipRect(bounds);
// Draw visible items
float itemWidth = bounds.Width - PeekAreaInsets * 2;
float contentHeight = bounds.Height - (ShowIndicators ? 30 : 0);
for (int i = 0; i < _items.Count; i++)
{
float x = bounds.Left + PeekAreaInsets + i * (itemWidth + ItemSpacing) - _scrollOffset;
// Only draw visible items
if (x + itemWidth > bounds.Left && x < bounds.Right)
{
_items[i].Draw(canvas);
}
}
// Draw indicators
if (ShowIndicators && _items.Count > 1)
{
DrawIndicators(canvas, bounds);
}
canvas.Restore();
}
private void DrawIndicators(SKCanvas canvas, SKRect bounds)
{
float indicatorSize = 8f;
float indicatorSpacing = 12f;
float totalWidth = _items.Count * indicatorSize + (_items.Count - 1) * (indicatorSpacing - indicatorSize);
float startX = bounds.MidX - totalWidth / 2;
float y = bounds.Bottom - 15;
using var normalPaint = new SKPaint
{
Color = IndicatorColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
using var selectedPaint = new SKPaint
{
Color = SelectedIndicatorColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
for (int i = 0; i < _items.Count; i++)
{
float x = startX + i * indicatorSpacing;
var paint = i == _currentPosition ? selectedPaint : normalPaint;
canvas.DrawCircle(x, y, indicatorSize / 2, paint);
}
}
public override SkiaView? HitTest(float x, float y)
{
if (!IsVisible || !Bounds.Contains(x, y)) return null;
// Check items
foreach (var item in _items)
{
var hit = item.HitTest(x, y);
if (hit != null) return hit;
}
return this;
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled || !IsSwipeEnabled) return;
_isDragging = true;
_dragStartX = e.X;
_dragStartOffset = _scrollOffset;
_lastDragX = e.X;
_lastDragTime = DateTime.UtcNow;
_velocity = 0;
_isAnimating = false;
e.Handled = true;
base.OnPointerPressed(e);
}
public override void OnPointerMoved(PointerEventArgs e)
{
if (!_isDragging) return;
float delta = _dragStartX - e.X;
_scrollOffset = _dragStartOffset + delta;
// Clamp scrolling
float maxOffset = GetOffsetForPosition(_items.Count - 1);
_scrollOffset = Math.Clamp(_scrollOffset, 0, maxOffset);
// Calculate velocity
var now = DateTime.UtcNow;
float timeDelta = (float)(now - _lastDragTime).TotalSeconds;
if (timeDelta > 0)
{
_velocity = (_lastDragX - e.X) / timeDelta;
}
_lastDragX = e.X;
_lastDragTime = now;
Scrolled?.Invoke(this, EventArgs.Empty);
Invalidate();
e.Handled = true;
base.OnPointerMoved(e);
}
public override void OnPointerReleased(PointerEventArgs e)
{
if (!_isDragging) return;
_isDragging = false;
// Determine target position based on velocity and position
float itemWidth = Bounds.Width - PeekAreaInsets * 2;
int targetPosition = GetPositionForOffset(_scrollOffset);
// Apply velocity influence
if (Math.Abs(_velocity) > 500)
{
if (_velocity > 0 && targetPosition < _items.Count - 1)
{
targetPosition++;
}
else if (_velocity < 0 && targetPosition > 0)
{
targetPosition--;
}
}
ScrollTo(targetPosition, true);
e.Handled = true;
base.OnPointerReleased(e);
}
}
/// <summary>
/// Event args for position changed events.
/// </summary>
public class PositionChangedEventArgs : EventArgs
{
public int PreviousPosition { get; }
public int CurrentPosition { get; }
public PositionChangedEventArgs(int previousPosition, int currentPosition)
{
PreviousPosition = previousPosition;
CurrentPosition = currentPosition;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Platform.Linux.Rendering;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered checkbox control.
/// </summary>
public class SkiaCheckBox : SkiaView
{
private bool _isChecked;
public bool IsChecked
{
get => _isChecked;
set
{
if (_isChecked != value)
{
_isChecked = value;
CheckedChanged?.Invoke(this, new CheckedChangedEventArgs(value));
Invalidate();
}
}
}
public SKColor CheckColor { get; set; } = SKColors.White;
public SKColor BoxColor { get; set; } = new SKColor(0x21, 0x96, 0xF3); // Material Blue
public SKColor UncheckedBoxColor { get; set; } = SKColors.White;
public SKColor BorderColor { get; set; } = new SKColor(0x75, 0x75, 0x75);
public SKColor DisabledColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public SKColor HoveredBorderColor { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public float BoxSize { get; set; } = 20;
public float CornerRadius { get; set; } = 3;
public float BorderWidth { get; set; } = 2;
public float CheckStrokeWidth { get; set; } = 2.5f;
public bool IsHovered { get; private set; }
public event EventHandler<CheckedChangedEventArgs>? CheckedChanged;
public SkiaCheckBox()
{
IsFocusable = true;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Center the checkbox box in bounds
var boxRect = new SKRect(
bounds.Left + (bounds.Width - BoxSize) / 2,
bounds.Top + (bounds.Height - BoxSize) / 2,
bounds.Left + (bounds.Width - BoxSize) / 2 + BoxSize,
bounds.Top + (bounds.Height - BoxSize) / 2 + BoxSize);
var roundRect = new SKRoundRect(boxRect, CornerRadius);
// Draw background
using var bgPaint = new SKPaint
{
Color = !IsEnabled ? DisabledColor
: IsChecked ? BoxColor
: UncheckedBoxColor,
IsAntialias = true,
Style = SKPaintStyle.Fill
};
canvas.DrawRoundRect(roundRect, bgPaint);
// Draw border
using var borderPaint = new SKPaint
{
Color = !IsEnabled ? DisabledColor
: IsChecked ? BoxColor
: IsHovered ? HoveredBorderColor
: BorderColor,
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = BorderWidth
};
canvas.DrawRoundRect(roundRect, borderPaint);
// Draw focus ring
if (IsFocused)
{
using var focusPaint = new SKPaint
{
Color = BoxColor.WithAlpha(80),
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = 3
};
var focusRect = new SKRoundRect(boxRect, CornerRadius);
focusRect.Inflate(4, 4);
canvas.DrawRoundRect(focusRect, focusPaint);
}
// Draw checkmark
if (IsChecked)
{
DrawCheckmark(canvas, boxRect);
}
}
private void DrawCheckmark(SKCanvas canvas, SKRect boxRect)
{
using var paint = new SKPaint
{
Color = CheckColor,
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = CheckStrokeWidth,
StrokeCap = SKStrokeCap.Round,
StrokeJoin = SKStrokeJoin.Round
};
// Checkmark path - a simple check
var padding = BoxSize * 0.2f;
var left = boxRect.Left + padding;
var right = boxRect.Right - padding;
var top = boxRect.Top + padding;
var bottom = boxRect.Bottom - padding;
// Check starts from bottom-left, goes to middle-bottom, then to top-right
using var path = new SKPath();
path.MoveTo(left, boxRect.MidY);
path.LineTo(boxRect.MidX - padding * 0.3f, bottom - padding * 0.5f);
path.LineTo(right, top + padding * 0.3f);
canvas.DrawPath(path, paint);
}
public override void OnPointerEntered(PointerEventArgs e)
{
if (!IsEnabled) return;
IsHovered = true;
Invalidate();
}
public override void OnPointerExited(PointerEventArgs e)
{
IsHovered = false;
Invalidate();
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
IsChecked = !IsChecked;
e.Handled = true;
}
public override void OnPointerReleased(PointerEventArgs e)
{
// Toggle handled in OnPointerPressed
}
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
// Toggle on Space
if (e.Key == Key.Space)
{
IsChecked = !IsChecked;
e.Handled = true;
}
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
// Add some padding around the box for touch targets
return new SKSize(BoxSize + 8, BoxSize + 8);
}
}
/// <summary>
/// Event args for checked changed events.
/// </summary>
public class CheckedChangedEventArgs : EventArgs
{
public bool IsChecked { get; }
public CheckedChangedEventArgs(bool isChecked)
{
IsChecked = isChecked;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using System.Collections;
using Microsoft.Maui.Graphics;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Selection mode for collection views.
/// </summary>
public enum SkiaSelectionMode
{
None,
Single,
Multiple
}
/// <summary>
/// Layout orientation for items.
/// </summary>
public enum ItemsLayoutOrientation
{
Vertical,
Horizontal
}
/// <summary>
/// Skia-rendered CollectionView with selection, headers, and flexible layouts.
/// </summary>
public class SkiaCollectionView : SkiaItemsView
{
private SkiaSelectionMode _selectionMode = SkiaSelectionMode.Single;
private object? _selectedItem;
private List<object> _selectedItems = new();
private int _selectedIndex = -1;
// Layout
private ItemsLayoutOrientation _orientation = ItemsLayoutOrientation.Vertical;
private int _spanCount = 1; // For grid layout
private float _itemWidth = 100;
// Header/Footer
private object? _header;
private object? _footer;
private float _headerHeight = 0;
private float _footerHeight = 0;
public SkiaSelectionMode SelectionMode
{
get => _selectionMode;
set
{
_selectionMode = value;
if (value == SkiaSelectionMode.None)
{
ClearSelection();
}
else if (value == SkiaSelectionMode.Single && _selectedItems.Count > 1)
{
// Keep only first selected
var first = _selectedItems.FirstOrDefault();
ClearSelection();
if (first != null)
{
SelectItem(first);
}
}
Invalidate();
}
}
public object? SelectedItem
{
get => _selectedItem;
set
{
if (_selectionMode == SkiaSelectionMode.None) return;
ClearSelection();
if (value != null)
{
SelectItem(value);
}
}
}
public IList<object> SelectedItems => _selectedItems.AsReadOnly();
public override int SelectedIndex
{
get => _selectedIndex;
set
{
if (_selectionMode == SkiaSelectionMode.None) return;
var item = GetItemAt(value);
if (item != null)
{
SelectedItem = item;
}
}
}
public ItemsLayoutOrientation Orientation
{
get => _orientation;
set
{
_orientation = value;
Invalidate();
}
}
public int SpanCount
{
get => _spanCount;
set
{
_spanCount = Math.Max(1, value);
Invalidate();
}
}
public float GridItemWidth
{
get => _itemWidth;
set
{
_itemWidth = value;
Invalidate();
}
}
public object? Header
{
get => _header;
set
{
_header = value;
_headerHeight = value != null ? 44 : 0;
Invalidate();
}
}
public object? Footer
{
get => _footer;
set
{
_footer = value;
_footerHeight = value != null ? 44 : 0;
Invalidate();
}
}
public float HeaderHeight
{
get => _headerHeight;
set
{
_headerHeight = value;
Invalidate();
}
}
public float FooterHeight
{
get => _footerHeight;
set
{
_footerHeight = value;
Invalidate();
}
}
public SKColor SelectionColor { get; set; } = new SKColor(0x21, 0x96, 0xF3, 0x40);
public SKColor HeaderBackgroundColor { get; set; } = new SKColor(0xF5, 0xF5, 0xF5);
public SKColor FooterBackgroundColor { get; set; } = new SKColor(0xF5, 0xF5, 0xF5);
public event EventHandler<CollectionSelectionChangedEventArgs>? SelectionChanged;
private void SelectItem(object item)
{
if (_selectionMode == SkiaSelectionMode.None) return;
var oldSelectedItems = _selectedItems.ToList();
if (_selectionMode == SkiaSelectionMode.Single)
{
_selectedItems.Clear();
_selectedItems.Add(item);
_selectedItem = item;
// Find index
for (int i = 0; i < ItemCount; i++)
{
if (GetItemAt(i) == item)
{
_selectedIndex = i;
break;
}
}
}
else // Multiple
{
if (_selectedItems.Contains(item))
{
_selectedItems.Remove(item);
if (_selectedItem == item)
{
_selectedItem = _selectedItems.FirstOrDefault();
}
}
else
{
_selectedItems.Add(item);
_selectedItem = item;
}
_selectedIndex = _selectedItem != null ? GetIndexOf(_selectedItem) : -1;
}
SelectionChanged?.Invoke(this, new CollectionSelectionChangedEventArgs(oldSelectedItems, _selectedItems.ToList()));
Invalidate();
}
private int GetIndexOf(object item)
{
for (int i = 0; i < ItemCount; i++)
{
if (GetItemAt(i) == item)
return i;
}
return -1;
}
private void ClearSelection()
{
var oldItems = _selectedItems.ToList();
_selectedItems.Clear();
_selectedItem = null;
_selectedIndex = -1;
if (oldItems.Count > 0)
{
SelectionChanged?.Invoke(this, new CollectionSelectionChangedEventArgs(oldItems, new List<object>()));
}
}
protected override void OnItemTapped(int index, object item)
{
if (_selectionMode != SkiaSelectionMode.None)
{
SelectItem(item);
}
base.OnItemTapped(index, item);
}
protected override void DrawItem(SKCanvas canvas, object item, int index, SKRect bounds, SKPaint paint)
{
// Draw selection highlight
bool isSelected = _selectedItems.Contains(item);
if (isSelected)
{
paint.Color = SelectionColor;
paint.Style = SKPaintStyle.Fill;
canvas.DrawRect(bounds, paint);
}
// Draw separator (only for vertical list layout)
if (_orientation == ItemsLayoutOrientation.Vertical && _spanCount == 1)
{
paint.Color = new SKColor(0xE0, 0xE0, 0xE0);
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = 1;
canvas.DrawLine(bounds.Left, bounds.Bottom, bounds.Right, bounds.Bottom, paint);
}
// Use custom renderer if provided
if (ItemRenderer != null)
{
if (ItemRenderer(item, index, bounds, canvas, paint))
return;
}
// Default rendering
paint.Color = SKColors.Black;
paint.Style = SKPaintStyle.Fill;
using var font = new SKFont(SKTypeface.Default, 14);
using var textPaint = new SKPaint(font)
{
Color = SKColors.Black,
IsAntialias = true
};
var text = item?.ToString() ?? "";
var textBounds = new SKRect();
textPaint.MeasureText(text, ref textBounds);
var x = bounds.Left + 16;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(text, x, y, textPaint);
// Draw checkmark for selected items in multiple selection mode
if (isSelected && _selectionMode == SkiaSelectionMode.Multiple)
{
DrawCheckmark(canvas, new SKRect(bounds.Right - 32, bounds.MidY - 8, bounds.Right - 16, bounds.MidY + 8));
}
}
private void DrawCheckmark(SKCanvas canvas, SKRect bounds)
{
using var paint = new SKPaint
{
Color = new SKColor(0x21, 0x96, 0xF3),
Style = SKPaintStyle.Stroke,
StrokeWidth = 2,
IsAntialias = true,
StrokeCap = SKStrokeCap.Round
};
using var path = new SKPath();
path.MoveTo(bounds.Left, bounds.MidY);
path.LineTo(bounds.MidX - 2, bounds.Bottom - 2);
path.LineTo(bounds.Right, bounds.Top + 2);
canvas.DrawPath(path, paint);
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw background
if (BackgroundColor != SKColors.Transparent)
{
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
}
// Draw header if present
if (_header != null && _headerHeight > 0)
{
var headerRect = new SKRect(bounds.Left, bounds.Top, bounds.Right, bounds.Top + _headerHeight);
DrawHeader(canvas, headerRect);
}
// Draw footer if present
if (_footer != null && _footerHeight > 0)
{
var footerRect = new SKRect(bounds.Left, bounds.Bottom - _footerHeight, bounds.Right, bounds.Bottom);
DrawFooter(canvas, footerRect);
}
// Adjust content bounds for header/footer
var contentBounds = new SKRect(
bounds.Left,
bounds.Top + _headerHeight,
bounds.Right,
bounds.Bottom - _footerHeight);
// Draw items
if (ItemCount == 0)
{
DrawEmptyView(canvas, contentBounds);
return;
}
// Use grid layout if spanCount > 1
if (_spanCount > 1)
{
DrawGridItems(canvas, contentBounds);
}
else
{
DrawListItems(canvas, contentBounds);
}
}
private void DrawListItems(SKCanvas canvas, SKRect bounds)
{
// Standard list drawing (delegate to base implementation via manual drawing)
canvas.Save();
canvas.ClipRect(bounds);
using var paint = new SKPaint { IsAntialias = true };
var scrollOffset = GetScrollOffset();
var firstVisible = Math.Max(0, (int)(scrollOffset / (ItemHeight + ItemSpacing)));
var lastVisible = Math.Min(ItemCount - 1,
(int)((scrollOffset + bounds.Height) / (ItemHeight + ItemSpacing)) + 1);
for (int i = firstVisible; i <= lastVisible; i++)
{
var itemY = bounds.Top + (i * (ItemHeight + ItemSpacing)) - scrollOffset;
var itemRect = new SKRect(bounds.Left, itemY, bounds.Right - 8, itemY + ItemHeight);
if (itemRect.Bottom < bounds.Top || itemRect.Top > bounds.Bottom)
continue;
var item = GetItemAt(i);
if (item != null)
{
DrawItem(canvas, item, i, itemRect, paint);
}
}
canvas.Restore();
// Draw scrollbar
var totalHeight = ItemCount * (ItemHeight + ItemSpacing) - ItemSpacing;
if (totalHeight > bounds.Height)
{
DrawScrollBarInternal(canvas, bounds, scrollOffset, totalHeight);
}
}
private void DrawGridItems(SKCanvas canvas, SKRect bounds)
{
canvas.Save();
canvas.ClipRect(bounds);
using var paint = new SKPaint { IsAntialias = true };
var cellWidth = (bounds.Width - 8) / _spanCount; // -8 for scrollbar
var cellHeight = ItemHeight;
var rowCount = (int)Math.Ceiling((double)ItemCount / _spanCount);
var totalHeight = rowCount * (cellHeight + ItemSpacing) - ItemSpacing;
var scrollOffset = GetScrollOffset();
var firstVisibleRow = Math.Max(0, (int)(scrollOffset / (cellHeight + ItemSpacing)));
var lastVisibleRow = Math.Min(rowCount - 1,
(int)((scrollOffset + bounds.Height) / (cellHeight + ItemSpacing)) + 1);
for (int row = firstVisibleRow; row <= lastVisibleRow; row++)
{
var rowY = bounds.Top + (row * (cellHeight + ItemSpacing)) - scrollOffset;
for (int col = 0; col < _spanCount; col++)
{
var index = row * _spanCount + col;
if (index >= ItemCount) break;
var cellX = bounds.Left + col * cellWidth;
var cellRect = new SKRect(cellX + 2, rowY, cellX + cellWidth - 2, rowY + cellHeight);
if (cellRect.Bottom < bounds.Top || cellRect.Top > bounds.Bottom)
continue;
var item = GetItemAt(index);
if (item != null)
{
// Draw cell background
using var cellBgPaint = new SKPaint
{
Color = _selectedItems.Contains(item) ? SelectionColor : new SKColor(0xFA, 0xFA, 0xFA),
Style = SKPaintStyle.Fill
};
canvas.DrawRoundRect(new SKRoundRect(cellRect, 4), cellBgPaint);
DrawItem(canvas, item, index, cellRect, paint);
}
}
}
canvas.Restore();
// Draw scrollbar
if (totalHeight > bounds.Height)
{
DrawScrollBarInternal(canvas, bounds, scrollOffset, totalHeight);
}
}
private void DrawScrollBarInternal(SKCanvas canvas, SKRect bounds, float scrollOffset, float totalHeight)
{
var scrollBarWidth = 8f;
var trackRect = new SKRect(
bounds.Right - scrollBarWidth,
bounds.Top,
bounds.Right,
bounds.Bottom);
using var trackPaint = new SKPaint
{
Color = new SKColor(200, 200, 200, 64),
Style = SKPaintStyle.Fill
};
canvas.DrawRect(trackRect, trackPaint);
var maxOffset = Math.Max(0, totalHeight - bounds.Height);
var viewportRatio = bounds.Height / totalHeight;
var thumbHeight = Math.Max(20, bounds.Height * viewportRatio);
var scrollRatio = maxOffset > 0 ? scrollOffset / maxOffset : 0;
var thumbY = bounds.Top + (bounds.Height - thumbHeight) * scrollRatio;
var thumbRect = new SKRect(
bounds.Right - scrollBarWidth + 1,
thumbY,
bounds.Right - 1,
thumbY + thumbHeight);
using var thumbPaint = new SKPaint
{
Color = new SKColor(128, 128, 128, 128),
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(thumbRect, 3), thumbPaint);
}
private float GetScrollOffset()
{
// Access base class scroll offset through reflection or expose it
// For now, use the field directly through internal access
return _scrollOffset;
}
private void DrawHeader(SKCanvas canvas, SKRect bounds)
{
using var bgPaint = new SKPaint
{
Color = HeaderBackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
// Draw header text
var text = _header?.ToString() ?? "";
if (!string.IsNullOrEmpty(text))
{
using var font = new SKFont(SKTypeface.Default, 16);
using var textPaint = new SKPaint(font)
{
Color = SKColors.Black,
IsAntialias = true
};
var textBounds = new SKRect();
textPaint.MeasureText(text, ref textBounds);
var x = bounds.Left + 16;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(text, x, y, textPaint);
}
// Draw separator
using var sepPaint = new SKPaint
{
Color = new SKColor(0xE0, 0xE0, 0xE0),
Style = SKPaintStyle.Stroke,
StrokeWidth = 1
};
canvas.DrawLine(bounds.Left, bounds.Bottom, bounds.Right, bounds.Bottom, sepPaint);
}
private void DrawFooter(SKCanvas canvas, SKRect bounds)
{
using var bgPaint = new SKPaint
{
Color = FooterBackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
// Draw separator
using var sepPaint = new SKPaint
{
Color = new SKColor(0xE0, 0xE0, 0xE0),
Style = SKPaintStyle.Stroke,
StrokeWidth = 1
};
canvas.DrawLine(bounds.Left, bounds.Top, bounds.Right, bounds.Top, sepPaint);
// Draw footer text
var text = _footer?.ToString() ?? "";
if (!string.IsNullOrEmpty(text))
{
using var font = new SKFont(SKTypeface.Default, 14);
using var textPaint = new SKPaint(font)
{
Color = new SKColor(0x80, 0x80, 0x80),
IsAntialias = true
};
var textBounds = new SKRect();
textPaint.MeasureText(text, ref textBounds);
var x = bounds.MidX - textBounds.MidX;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(text, x, y, textPaint);
}
}
}
/// <summary>
/// Event args for collection selection changed events.
/// </summary>
public class CollectionSelectionChangedEventArgs : EventArgs
{
public IReadOnlyList<object> PreviousSelection { get; }
public IReadOnlyList<object> CurrentSelection { get; }
public CollectionSelectionChangedEventArgs(IList<object> previousSelection, IList<object> currentSelection)
{
PreviousSelection = previousSelection.ToList().AsReadOnly();
CurrentSelection = currentSelection.ToList().AsReadOnly();
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered date picker control with calendar popup.
/// </summary>
public class SkiaDatePicker : SkiaView
{
private DateTime _date = DateTime.Today;
private DateTime _minimumDate = new DateTime(1900, 1, 1);
private DateTime _maximumDate = new DateTime(2100, 12, 31);
private DateTime _displayMonth;
private bool _isOpen;
private string _format = "d";
// Styling
public SKColor TextColor { get; set; } = SKColors.Black;
public SKColor BorderColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public SKColor CalendarBackgroundColor { get; set; } = SKColors.White;
public SKColor SelectedDayColor { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public SKColor TodayColor { get; set; } = new SKColor(0x21, 0x96, 0xF3, 0x40);
public SKColor HeaderColor { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public SKColor DisabledDayColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public float FontSize { get; set; } = 14;
public float CornerRadius { get; set; } = 4;
private const float CalendarWidth = 280;
private const float CalendarHeight = 320;
private const float DayCellSize = 36;
private const float HeaderHeight = 48;
public DateTime Date
{
get => _date;
set
{
var clamped = ClampDate(value);
if (_date != clamped)
{
_date = clamped;
_displayMonth = new DateTime(_date.Year, _date.Month, 1);
DateSelected?.Invoke(this, EventArgs.Empty);
Invalidate();
}
}
}
public DateTime MinimumDate
{
get => _minimumDate;
set { _minimumDate = value; Invalidate(); }
}
public DateTime MaximumDate
{
get => _maximumDate;
set { _maximumDate = value; Invalidate(); }
}
public string Format
{
get => _format;
set { _format = value; Invalidate(); }
}
public bool IsOpen
{
get => _isOpen;
set { _isOpen = value; Invalidate(); }
}
public event EventHandler? DateSelected;
public SkiaDatePicker()
{
IsFocusable = true;
_displayMonth = new DateTime(_date.Year, _date.Month, 1);
}
private DateTime ClampDate(DateTime date)
{
if (date < _minimumDate) return _minimumDate;
if (date > _maximumDate) return _maximumDate;
return date;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
DrawPickerButton(canvas, bounds);
if (_isOpen)
{
DrawCalendar(canvas, bounds);
}
}
private void DrawPickerButton(SKCanvas canvas, SKRect bounds)
{
// Draw background
using var bgPaint = new SKPaint
{
Color = IsEnabled ? BackgroundColor : new SKColor(0xF5, 0xF5, 0xF5),
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(bounds, CornerRadius), bgPaint);
// Draw border
using var borderPaint = new SKPaint
{
Color = IsFocused ? SelectedDayColor : BorderColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = IsFocused ? 2 : 1,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(bounds, CornerRadius), borderPaint);
// Draw date text
using var font = new SKFont(SKTypeface.Default, FontSize);
using var textPaint = new SKPaint(font)
{
Color = IsEnabled ? TextColor : TextColor.WithAlpha(128),
IsAntialias = true
};
var dateText = _date.ToString(_format);
var textBounds = new SKRect();
textPaint.MeasureText(dateText, ref textBounds);
var textX = bounds.Left + 12;
var textY = bounds.MidY - textBounds.MidY;
canvas.DrawText(dateText, textX, textY, textPaint);
// Draw calendar icon
DrawCalendarIcon(canvas, new SKRect(bounds.Right - 36, bounds.MidY - 10, bounds.Right - 12, bounds.MidY + 10));
}
private void DrawCalendarIcon(SKCanvas canvas, SKRect bounds)
{
using var paint = new SKPaint
{
Color = IsEnabled ? TextColor : TextColor.WithAlpha(128),
Style = SKPaintStyle.Stroke,
StrokeWidth = 1.5f,
IsAntialias = true
};
// Calendar outline
var calRect = new SKRect(bounds.Left, bounds.Top + 3, bounds.Right, bounds.Bottom);
canvas.DrawRoundRect(new SKRoundRect(calRect, 2), paint);
// Top tabs
canvas.DrawLine(bounds.Left + 5, bounds.Top, bounds.Left + 5, bounds.Top + 5, paint);
canvas.DrawLine(bounds.Right - 5, bounds.Top, bounds.Right - 5, bounds.Top + 5, paint);
// Header line
canvas.DrawLine(bounds.Left, bounds.Top + 8, bounds.Right, bounds.Top + 8, paint);
// Dots for days
paint.Style = SKPaintStyle.Fill;
paint.StrokeWidth = 0;
for (int row = 0; row < 2; row++)
{
for (int col = 0; col < 3; col++)
{
var dotX = bounds.Left + 4 + col * 6;
var dotY = bounds.Top + 12 + row * 4;
canvas.DrawCircle(dotX, dotY, 1, paint);
}
}
}
private void DrawCalendar(SKCanvas canvas, SKRect bounds)
{
var calendarRect = new SKRect(
bounds.Left,
bounds.Bottom + 4,
bounds.Left + CalendarWidth,
bounds.Bottom + 4 + CalendarHeight);
// Draw shadow
using var shadowPaint = new SKPaint
{
Color = new SKColor(0, 0, 0, 40),
MaskFilter = SKMaskFilter.CreateBlur(SKBlurStyle.Normal, 4),
Style = SKPaintStyle.Fill
};
canvas.DrawRoundRect(new SKRoundRect(new SKRect(calendarRect.Left + 2, calendarRect.Top + 2, calendarRect.Right + 2, calendarRect.Bottom + 2), CornerRadius), shadowPaint);
// Draw background
using var bgPaint = new SKPaint
{
Color = CalendarBackgroundColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(calendarRect, CornerRadius), bgPaint);
// Draw border
using var borderPaint = new SKPaint
{
Color = BorderColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = 1,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(calendarRect, CornerRadius), borderPaint);
// Draw header
DrawCalendarHeader(canvas, new SKRect(calendarRect.Left, calendarRect.Top, calendarRect.Right, calendarRect.Top + HeaderHeight));
// Draw weekday headers
DrawWeekdayHeaders(canvas, new SKRect(calendarRect.Left, calendarRect.Top + HeaderHeight, calendarRect.Right, calendarRect.Top + HeaderHeight + 30));
// Draw days
DrawDays(canvas, new SKRect(calendarRect.Left, calendarRect.Top + HeaderHeight + 30, calendarRect.Right, calendarRect.Bottom));
}
private void DrawCalendarHeader(SKCanvas canvas, SKRect bounds)
{
// Draw header background
using var headerPaint = new SKPaint
{
Color = HeaderColor,
Style = SKPaintStyle.Fill
};
var headerRect = new SKRect(bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);
canvas.Save();
canvas.ClipRoundRect(new SKRoundRect(new SKRect(bounds.Left, bounds.Top, bounds.Right, bounds.Top + CornerRadius * 2), CornerRadius));
canvas.DrawRect(headerRect, headerPaint);
canvas.Restore();
canvas.DrawRect(new SKRect(bounds.Left, bounds.Top + CornerRadius, bounds.Right, bounds.Bottom), headerPaint);
// Draw month/year text
using var font = new SKFont(SKTypeface.Default, 16);
using var textPaint = new SKPaint(font)
{
Color = SKColors.White,
IsAntialias = true
};
var monthYear = _displayMonth.ToString("MMMM yyyy");
var textBounds = new SKRect();
textPaint.MeasureText(monthYear, ref textBounds);
canvas.DrawText(monthYear, bounds.MidX - textBounds.MidX, bounds.MidY - textBounds.MidY, textPaint);
// Draw navigation arrows
using var arrowPaint = new SKPaint
{
Color = SKColors.White,
Style = SKPaintStyle.Stroke,
StrokeWidth = 2,
IsAntialias = true,
StrokeCap = SKStrokeCap.Round
};
// Left arrow
var leftArrowX = bounds.Left + 20;
using var leftPath = new SKPath();
leftPath.MoveTo(leftArrowX + 6, bounds.MidY - 6);
leftPath.LineTo(leftArrowX, bounds.MidY);
leftPath.LineTo(leftArrowX + 6, bounds.MidY + 6);
canvas.DrawPath(leftPath, arrowPaint);
// Right arrow
var rightArrowX = bounds.Right - 20;
using var rightPath = new SKPath();
rightPath.MoveTo(rightArrowX - 6, bounds.MidY - 6);
rightPath.LineTo(rightArrowX, bounds.MidY);
rightPath.LineTo(rightArrowX - 6, bounds.MidY + 6);
canvas.DrawPath(rightPath, arrowPaint);
}
private void DrawWeekdayHeaders(SKCanvas canvas, SKRect bounds)
{
var dayNames = new[] { "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa" };
var cellWidth = bounds.Width / 7;
using var font = new SKFont(SKTypeface.Default, 12);
using var paint = new SKPaint(font)
{
Color = new SKColor(0x80, 0x80, 0x80),
IsAntialias = true
};
for (int i = 0; i < 7; i++)
{
var textBounds = new SKRect();
paint.MeasureText(dayNames[i], ref textBounds);
var x = bounds.Left + i * cellWidth + cellWidth / 2 - textBounds.MidX;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(dayNames[i], x, y, paint);
}
}
private void DrawDays(SKCanvas canvas, SKRect bounds)
{
var firstDay = new DateTime(_displayMonth.Year, _displayMonth.Month, 1);
var daysInMonth = DateTime.DaysInMonth(_displayMonth.Year, _displayMonth.Month);
var startDayOfWeek = (int)firstDay.DayOfWeek;
var cellWidth = bounds.Width / 7;
var cellHeight = (bounds.Height - 10) / 6;
using var font = new SKFont(SKTypeface.Default, 14);
using var textPaint = new SKPaint(font) { IsAntialias = true };
using var bgPaint = new SKPaint { Style = SKPaintStyle.Fill, IsAntialias = true };
var today = DateTime.Today;
for (int day = 1; day <= daysInMonth; day++)
{
var dayDate = new DateTime(_displayMonth.Year, _displayMonth.Month, day);
var cellIndex = startDayOfWeek + day - 1;
var row = cellIndex / 7;
var col = cellIndex % 7;
var cellX = bounds.Left + col * cellWidth;
var cellY = bounds.Top + row * cellHeight;
var cellRect = new SKRect(cellX + 2, cellY + 2, cellX + cellWidth - 2, cellY + cellHeight - 2);
var isSelected = dayDate.Date == _date.Date;
var isToday = dayDate.Date == today;
var isDisabled = dayDate < _minimumDate || dayDate > _maximumDate;
// Draw day background
if (isSelected)
{
bgPaint.Color = SelectedDayColor;
canvas.DrawCircle(cellRect.MidX, cellRect.MidY, Math.Min(cellRect.Width, cellRect.Height) / 2 - 2, bgPaint);
}
else if (isToday)
{
bgPaint.Color = TodayColor;
canvas.DrawCircle(cellRect.MidX, cellRect.MidY, Math.Min(cellRect.Width, cellRect.Height) / 2 - 2, bgPaint);
}
// Draw day text
textPaint.Color = isSelected ? SKColors.White : isDisabled ? DisabledDayColor : TextColor;
var dayText = day.ToString();
var textBounds = new SKRect();
textPaint.MeasureText(dayText, ref textBounds);
canvas.DrawText(dayText, cellRect.MidX - textBounds.MidX, cellRect.MidY - textBounds.MidY, textPaint);
}
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
if (_isOpen)
{
var calendarTop = Bounds.Bottom + 4;
// Check header navigation
if (e.Y >= calendarTop && e.Y < calendarTop + HeaderHeight)
{
if (e.X < Bounds.Left + 40)
{
// Previous month
_displayMonth = _displayMonth.AddMonths(-1);
Invalidate();
return;
}
else if (e.X > Bounds.Left + CalendarWidth - 40)
{
// Next month
_displayMonth = _displayMonth.AddMonths(1);
Invalidate();
return;
}
}
// Check day selection
var daysTop = calendarTop + HeaderHeight + 30;
if (e.Y >= daysTop && e.Y < calendarTop + CalendarHeight)
{
var cellWidth = CalendarWidth / 7;
var cellHeight = (CalendarHeight - HeaderHeight - 40) / 6;
var col = (int)((e.X - Bounds.Left) / cellWidth);
var row = (int)((e.Y - daysTop) / cellHeight);
var firstDay = new DateTime(_displayMonth.Year, _displayMonth.Month, 1);
var startDayOfWeek = (int)firstDay.DayOfWeek;
var dayIndex = row * 7 + col - startDayOfWeek + 1;
var daysInMonth = DateTime.DaysInMonth(_displayMonth.Year, _displayMonth.Month);
if (dayIndex >= 1 && dayIndex <= daysInMonth)
{
var selectedDate = new DateTime(_displayMonth.Year, _displayMonth.Month, dayIndex);
if (selectedDate >= _minimumDate && selectedDate <= _maximumDate)
{
Date = selectedDate;
_isOpen = false;
}
}
}
else if (e.Y < calendarTop)
{
_isOpen = false;
}
}
else
{
_isOpen = true;
}
Invalidate();
}
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
switch (e.Key)
{
case Key.Enter:
case Key.Space:
_isOpen = !_isOpen;
e.Handled = true;
break;
case Key.Escape:
if (_isOpen)
{
_isOpen = false;
e.Handled = true;
}
break;
case Key.Left:
Date = _date.AddDays(-1);
e.Handled = true;
break;
case Key.Right:
Date = _date.AddDays(1);
e.Handled = true;
break;
case Key.Up:
Date = _date.AddDays(-7);
e.Handled = true;
break;
case Key.Down:
Date = _date.AddDays(7);
e.Handled = true;
break;
}
Invalidate();
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
return new SKSize(
availableSize.Width < float.MaxValue ? Math.Min(availableSize.Width, 200) : 200,
40);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered multiline text editor control.
/// </summary>
public class SkiaEditor : SkiaView
{
private string _text = "";
private string _placeholder = "";
private int _cursorPosition;
private int _selectionStart = -1;
private int _selectionLength;
private float _scrollOffsetY;
private bool _isReadOnly;
private int _maxLength = -1;
private bool _cursorVisible = true;
private DateTime _lastCursorBlink = DateTime.Now;
// Cached line information
private List<string> _lines = new() { "" };
private List<float> _lineHeights = new();
// Styling
public SKColor TextColor { get; set; } = SKColors.Black;
public SKColor PlaceholderColor { get; set; } = new SKColor(0x80, 0x80, 0x80);
public SKColor BorderColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public SKColor SelectionColor { get; set; } = new SKColor(0x21, 0x96, 0xF3, 0x60);
public SKColor CursorColor { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public string FontFamily { get; set; } = "Sans";
public float FontSize { get; set; } = 14;
public float LineHeight { get; set; } = 1.4f;
public float CornerRadius { get; set; } = 4;
public float Padding { get; set; } = 12;
public bool AutoSize { get; set; }
public string Text
{
get => _text;
set
{
var newText = value ?? "";
if (_maxLength > 0 && newText.Length > _maxLength)
{
newText = newText.Substring(0, _maxLength);
}
if (_text != newText)
{
_text = newText;
UpdateLines();
_cursorPosition = Math.Min(_cursorPosition, _text.Length);
TextChanged?.Invoke(this, EventArgs.Empty);
Invalidate();
}
}
}
public string Placeholder
{
get => _placeholder;
set { _placeholder = value ?? ""; Invalidate(); }
}
public bool IsReadOnly
{
get => _isReadOnly;
set { _isReadOnly = value; Invalidate(); }
}
public int MaxLength
{
get => _maxLength;
set { _maxLength = value; }
}
public int CursorPosition
{
get => _cursorPosition;
set
{
_cursorPosition = Math.Clamp(value, 0, _text.Length);
EnsureCursorVisible();
Invalidate();
}
}
public event EventHandler? TextChanged;
public event EventHandler? Completed;
public SkiaEditor()
{
IsFocusable = true;
}
private void UpdateLines()
{
_lines.Clear();
if (string.IsNullOrEmpty(_text))
{
_lines.Add("");
return;
}
var currentLine = "";
foreach (var ch in _text)
{
if (ch == '\n')
{
_lines.Add(currentLine);
currentLine = "";
}
else
{
currentLine += ch;
}
}
_lines.Add(currentLine);
}
private (int line, int column) GetLineColumn(int position)
{
var pos = 0;
for (int i = 0; i < _lines.Count; i++)
{
var lineLength = _lines[i].Length;
if (pos + lineLength >= position || i == _lines.Count - 1)
{
return (i, position - pos);
}
pos += lineLength + 1; // +1 for newline
}
return (_lines.Count - 1, _lines[^1].Length);
}
private int GetPosition(int line, int column)
{
var pos = 0;
for (int i = 0; i < line && i < _lines.Count; i++)
{
pos += _lines[i].Length + 1;
}
if (line < _lines.Count)
{
pos += Math.Min(column, _lines[line].Length);
}
return Math.Min(pos, _text.Length);
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Handle cursor blinking
if (IsFocused && (DateTime.Now - _lastCursorBlink).TotalMilliseconds > 500)
{
_cursorVisible = !_cursorVisible;
_lastCursorBlink = DateTime.Now;
}
// Draw background
using var bgPaint = new SKPaint
{
Color = IsEnabled ? BackgroundColor : new SKColor(0xF5, 0xF5, 0xF5),
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(bounds, CornerRadius), bgPaint);
// Draw border
using var borderPaint = new SKPaint
{
Color = IsFocused ? CursorColor : BorderColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = IsFocused ? 2 : 1,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(bounds, CornerRadius), borderPaint);
// Setup text rendering
using var font = new SKFont(SKTypeface.Default, FontSize);
var lineSpacing = FontSize * LineHeight;
// Clip to content area
var contentRect = new SKRect(
bounds.Left + Padding,
bounds.Top + Padding,
bounds.Right - Padding,
bounds.Bottom - Padding);
canvas.Save();
canvas.ClipRect(contentRect);
canvas.Translate(0, -_scrollOffsetY);
if (string.IsNullOrEmpty(_text) && !string.IsNullOrEmpty(_placeholder))
{
// Draw placeholder
using var placeholderPaint = new SKPaint(font)
{
Color = PlaceholderColor,
IsAntialias = true
};
canvas.DrawText(_placeholder, contentRect.Left, contentRect.Top + FontSize, placeholderPaint);
}
else
{
// Draw text with selection
using var textPaint = new SKPaint(font)
{
Color = IsEnabled ? TextColor : TextColor.WithAlpha(128),
IsAntialias = true
};
using var selectionPaint = new SKPaint
{
Color = SelectionColor,
Style = SKPaintStyle.Fill
};
var y = contentRect.Top + FontSize;
var charIndex = 0;
for (int lineIndex = 0; lineIndex < _lines.Count; lineIndex++)
{
var line = _lines[lineIndex];
var x = contentRect.Left;
// Draw selection for this line if applicable
if (_selectionStart >= 0 && _selectionLength > 0)
{
var selEnd = _selectionStart + _selectionLength;
var lineStart = charIndex;
var lineEnd = charIndex + line.Length;
if (selEnd > lineStart && _selectionStart < lineEnd)
{
var selStartInLine = Math.Max(0, _selectionStart - lineStart);
var selEndInLine = Math.Min(line.Length, selEnd - lineStart);
var startX = x + MeasureText(line.Substring(0, selStartInLine), font);
var endX = x + MeasureText(line.Substring(0, selEndInLine), font);
canvas.DrawRect(new SKRect(startX, y - FontSize, endX, y + lineSpacing - FontSize), selectionPaint);
}
}
// Draw line text
canvas.DrawText(line, x, y, textPaint);
// Draw cursor if on this line
if (IsFocused && _cursorVisible)
{
var (cursorLine, cursorCol) = GetLineColumn(_cursorPosition);
if (cursorLine == lineIndex)
{
var cursorX = x + MeasureText(line.Substring(0, Math.Min(cursorCol, line.Length)), font);
using var cursorPaint = new SKPaint
{
Color = CursorColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = 2,
IsAntialias = true
};
canvas.DrawLine(cursorX, y - FontSize + 2, cursorX, y + 2, cursorPaint);
}
}
y += lineSpacing;
charIndex += line.Length + 1; // +1 for newline
}
}
canvas.Restore();
// Draw scrollbar if needed
var totalHeight = _lines.Count * FontSize * LineHeight;
if (totalHeight > contentRect.Height)
{
DrawScrollbar(canvas, bounds, contentRect.Height, totalHeight);
}
}
private float MeasureText(string text, SKFont font)
{
if (string.IsNullOrEmpty(text)) return 0;
using var paint = new SKPaint(font);
return paint.MeasureText(text);
}
private void DrawScrollbar(SKCanvas canvas, SKRect bounds, float viewHeight, float contentHeight)
{
var scrollbarWidth = 6f;
var scrollbarMargin = 2f;
var scrollbarHeight = Math.Max(20, viewHeight * (viewHeight / contentHeight));
var scrollbarY = bounds.Top + Padding + (_scrollOffsetY / contentHeight) * (viewHeight - scrollbarHeight);
using var paint = new SKPaint
{
Color = new SKColor(0, 0, 0, 60),
Style = SKPaintStyle.Fill,
IsAntialias = true
};
canvas.DrawRoundRect(new SKRoundRect(
new SKRect(
bounds.Right - scrollbarWidth - scrollbarMargin,
scrollbarY,
bounds.Right - scrollbarMargin,
scrollbarY + scrollbarHeight),
scrollbarWidth / 2), paint);
}
private void EnsureCursorVisible()
{
var (line, col) = GetLineColumn(_cursorPosition);
var lineSpacing = FontSize * LineHeight;
var cursorY = line * lineSpacing;
var viewHeight = Bounds.Height - Padding * 2;
if (cursorY < _scrollOffsetY)
{
_scrollOffsetY = cursorY;
}
else if (cursorY + lineSpacing > _scrollOffsetY + viewHeight)
{
_scrollOffsetY = cursorY + lineSpacing - viewHeight;
}
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
// Request focus by notifying parent
IsFocused = true;
// Calculate cursor position from click
var contentX = e.X - Bounds.Left - Padding;
var contentY = e.Y - Bounds.Top - Padding + _scrollOffsetY;
var lineSpacing = FontSize * LineHeight;
var clickedLine = Math.Clamp((int)(contentY / lineSpacing), 0, _lines.Count - 1);
using var font = new SKFont(SKTypeface.Default, FontSize);
var line = _lines[clickedLine];
var clickedCol = 0;
// Find closest character position
for (int i = 0; i <= line.Length; i++)
{
var charX = MeasureText(line.Substring(0, i), font);
if (charX > contentX)
{
clickedCol = i > 0 ? i - 1 : 0;
break;
}
clickedCol = i;
}
_cursorPosition = GetPosition(clickedLine, clickedCol);
_selectionStart = -1;
_selectionLength = 0;
_cursorVisible = true;
_lastCursorBlink = DateTime.Now;
Invalidate();
}
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
var (line, col) = GetLineColumn(_cursorPosition);
_cursorVisible = true;
_lastCursorBlink = DateTime.Now;
switch (e.Key)
{
case Key.Left:
if (_cursorPosition > 0)
{
_cursorPosition--;
EnsureCursorVisible();
}
e.Handled = true;
break;
case Key.Right:
if (_cursorPosition < _text.Length)
{
_cursorPosition++;
EnsureCursorVisible();
}
e.Handled = true;
break;
case Key.Up:
if (line > 0)
{
_cursorPosition = GetPosition(line - 1, col);
EnsureCursorVisible();
}
e.Handled = true;
break;
case Key.Down:
if (line < _lines.Count - 1)
{
_cursorPosition = GetPosition(line + 1, col);
EnsureCursorVisible();
}
e.Handled = true;
break;
case Key.Home:
_cursorPosition = GetPosition(line, 0);
EnsureCursorVisible();
e.Handled = true;
break;
case Key.End:
_cursorPosition = GetPosition(line, _lines[line].Length);
EnsureCursorVisible();
e.Handled = true;
break;
case Key.Enter:
if (!_isReadOnly)
{
InsertText("\n");
}
e.Handled = true;
break;
case Key.Backspace:
if (!_isReadOnly && _cursorPosition > 0)
{
Text = _text.Remove(_cursorPosition - 1, 1);
_cursorPosition--;
EnsureCursorVisible();
}
e.Handled = true;
break;
case Key.Delete:
if (!_isReadOnly && _cursorPosition < _text.Length)
{
Text = _text.Remove(_cursorPosition, 1);
}
e.Handled = true;
break;
case Key.Tab:
if (!_isReadOnly)
{
InsertText(" "); // 4 spaces for tab
}
e.Handled = true;
break;
}
Invalidate();
}
public override void OnTextInput(TextInputEventArgs e)
{
if (!IsEnabled || _isReadOnly) return;
if (!string.IsNullOrEmpty(e.Text))
{
InsertText(e.Text);
e.Handled = true;
}
}
private void InsertText(string text)
{
if (_selectionLength > 0)
{
// Replace selection
_text = _text.Remove(_selectionStart, _selectionLength);
_cursorPosition = _selectionStart;
_selectionStart = -1;
_selectionLength = 0;
}
if (_maxLength > 0 && _text.Length + text.Length > _maxLength)
{
text = text.Substring(0, Math.Max(0, _maxLength - _text.Length));
}
if (!string.IsNullOrEmpty(text))
{
Text = _text.Insert(_cursorPosition, text);
_cursorPosition += text.Length;
EnsureCursorVisible();
}
}
public override void OnScroll(ScrollEventArgs e)
{
var lineSpacing = FontSize * LineHeight;
var totalHeight = _lines.Count * lineSpacing;
var viewHeight = Bounds.Height - Padding * 2;
var maxScroll = Math.Max(0, totalHeight - viewHeight);
_scrollOffsetY = Math.Clamp(_scrollOffsetY - e.DeltaY * 3, 0, maxScroll);
Invalidate();
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
if (AutoSize)
{
var lineSpacing = FontSize * LineHeight;
var height = Math.Max(lineSpacing + Padding * 2, _lines.Count * lineSpacing + Padding * 2);
return new SKSize(
availableSize.Width < float.MaxValue ? availableSize.Width : 200,
(float)Math.Min(height, availableSize.Height < float.MaxValue ? availableSize.Height : 200));
}
return new SKSize(
availableSize.Width < float.MaxValue ? Math.Min(availableSize.Width, 200) : 200,
availableSize.Height < float.MaxValue ? Math.Min(availableSize.Height, 150) : 150);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Platform.Linux.Rendering;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered text entry control.
/// </summary>
public class SkiaEntry : SkiaView
{
private string _text = "";
private int _cursorPosition;
private int _selectionStart;
private int _selectionLength;
private float _scrollOffset;
private DateTime _cursorBlinkTime = DateTime.UtcNow;
private bool _cursorVisible = true;
public string Text
{
get => _text;
set
{
if (_text != value)
{
var oldText = _text;
_text = value ?? "";
_cursorPosition = Math.Min(_cursorPosition, _text.Length);
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
Invalidate();
}
}
}
public string Placeholder { get; set; } = "";
public SKColor PlaceholderColor { get; set; } = new SKColor(0x9E, 0x9E, 0x9E);
public SKColor TextColor { get; set; } = SKColors.Black;
public new SKColor BackgroundColor { get; set; } = SKColors.White;
public SKColor BorderColor { get; set; } = new SKColor(0xBD, 0xBD, 0xBD);
public SKColor FocusedBorderColor { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public SKColor SelectionColor { get; set; } = new SKColor(0x21, 0x96, 0xF3, 0x80);
public SKColor CursorColor { get; set; } = new SKColor(0x21, 0x96, 0xF3);
public string FontFamily { get; set; } = "Sans";
public float FontSize { get; set; } = 14;
public bool IsBold { get; set; }
public bool IsItalic { get; set; }
public float CharacterSpacing { get; set; }
public float CornerRadius { get; set; } = 4;
public float BorderWidth { get; set; } = 1;
public SKRect Padding { get; set; } = new SKRect(12, 8, 12, 8);
public bool IsPassword { get; set; }
public char PasswordChar { get; set; } = '●';
public int MaxLength { get; set; } = 0; // 0 = unlimited
public bool IsReadOnly { get; set; }
public TextAlignment HorizontalTextAlignment { get; set; } = TextAlignment.Start;
public TextAlignment VerticalTextAlignment { get; set; } = TextAlignment.Center;
public bool ShowClearButton { get; set; }
public int CursorPosition
{
get => _cursorPosition;
set
{
_cursorPosition = Math.Clamp(value, 0, _text.Length);
ResetCursorBlink();
Invalidate();
}
}
public int SelectionLength
{
get => _selectionLength;
set
{
_selectionLength = value;
Invalidate();
}
}
public event EventHandler<TextChangedEventArgs>? TextChanged;
public event EventHandler? Completed;
public SkiaEntry()
{
IsFocusable = true;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw background
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
IsAntialias = true,
Style = SKPaintStyle.Fill
};
var rect = new SKRoundRect(bounds, CornerRadius);
canvas.DrawRoundRect(rect, bgPaint);
// Draw border
var borderColor = IsFocused ? FocusedBorderColor : BorderColor;
var borderWidth = IsFocused ? BorderWidth + 1 : BorderWidth;
using var borderPaint = new SKPaint
{
Color = borderColor,
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = borderWidth
};
canvas.DrawRoundRect(rect, borderPaint);
// Calculate content bounds
var contentBounds = new SKRect(
bounds.Left + Padding.Left,
bounds.Top + Padding.Top,
bounds.Right - Padding.Right,
bounds.Bottom - Padding.Bottom);
// Reserve space for clear button if shown
var clearButtonSize = 20f;
var clearButtonMargin = 8f;
if (ShowClearButton && !string.IsNullOrEmpty(_text) && IsFocused)
{
contentBounds.Right -= clearButtonSize + clearButtonMargin;
}
// Set up clipping for text area
canvas.Save();
canvas.ClipRect(contentBounds);
var fontStyle = GetFontStyle();
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font) { IsAntialias = true };
// Apply character spacing if set
if (CharacterSpacing > 0)
{
// Character spacing applied via SKPaint
}
var displayText = GetDisplayText();
var hasText = !string.IsNullOrEmpty(displayText);
if (hasText)
{
paint.Color = TextColor;
// Measure text to cursor position for scrolling
var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
var cursorX = paint.MeasureText(textToCursor);
// Auto-scroll to keep cursor visible
if (cursorX - _scrollOffset > contentBounds.Width - 10)
{
_scrollOffset = cursorX - contentBounds.Width + 10;
}
else if (cursorX - _scrollOffset < 0)
{
_scrollOffset = cursorX;
}
// Draw selection
if (IsFocused && _selectionLength > 0)
{
DrawSelection(canvas, paint, displayText, contentBounds);
}
// Calculate text position based on vertical alignment
var textBounds = new SKRect();
paint.MeasureText(displayText, ref textBounds);
float x = contentBounds.Left - _scrollOffset;
float y = VerticalTextAlignment switch
{
TextAlignment.Start => contentBounds.Top - textBounds.Top,
TextAlignment.End => contentBounds.Bottom - textBounds.Bottom,
_ => contentBounds.MidY - textBounds.MidY // Center
};
canvas.DrawText(displayText, x, y, paint);
// Draw cursor
if (IsFocused && !IsReadOnly && _cursorVisible)
{
DrawCursor(canvas, paint, displayText, contentBounds);
}
}
else if (!string.IsNullOrEmpty(Placeholder))
{
// Draw placeholder
paint.Color = PlaceholderColor;
var textBounds = new SKRect();
paint.MeasureText(Placeholder, ref textBounds);
float x = contentBounds.Left;
float y = contentBounds.MidY - textBounds.MidY;
canvas.DrawText(Placeholder, x, y, paint);
}
else if (IsFocused && !IsReadOnly && _cursorVisible)
{
// Draw cursor even with no text
DrawCursor(canvas, paint, "", contentBounds);
}
canvas.Restore();
// Draw clear button if applicable
if (ShowClearButton && !string.IsNullOrEmpty(_text) && IsFocused)
{
DrawClearButton(canvas, bounds, clearButtonSize, clearButtonMargin);
}
}
private SKFontStyle GetFontStyle()
{
if (IsBold && IsItalic)
return SKFontStyle.BoldItalic;
if (IsBold)
return SKFontStyle.Bold;
if (IsItalic)
return SKFontStyle.Italic;
return SKFontStyle.Normal;
}
private void DrawClearButton(SKCanvas canvas, SKRect bounds, float size, float margin)
{
var centerX = bounds.Right - margin - size / 2;
var centerY = bounds.MidY;
// Draw circle background
using var circlePaint = new SKPaint
{
Color = new SKColor(0xBD, 0xBD, 0xBD),
IsAntialias = true,
Style = SKPaintStyle.Fill
};
canvas.DrawCircle(centerX, centerY, size / 2 - 2, circlePaint);
// Draw X
using var xPaint = new SKPaint
{
Color = SKColors.White,
IsAntialias = true,
Style = SKPaintStyle.Stroke,
StrokeWidth = 2,
StrokeCap = SKStrokeCap.Round
};
var offset = size / 4 - 1;
canvas.DrawLine(centerX - offset, centerY - offset, centerX + offset, centerY + offset, xPaint);
canvas.DrawLine(centerX - offset, centerY + offset, centerX + offset, centerY - offset, xPaint);
}
private string GetDisplayText()
{
if (IsPassword && !string.IsNullOrEmpty(_text))
{
return new string(PasswordChar, _text.Length);
}
return _text;
}
private void DrawSelection(SKCanvas canvas, SKPaint paint, string displayText, SKRect bounds)
{
var selStart = Math.Min(_selectionStart, _selectionStart + _selectionLength);
var selEnd = Math.Max(_selectionStart, _selectionStart + _selectionLength);
var textToStart = displayText.Substring(0, selStart);
var textToEnd = displayText.Substring(0, selEnd);
var startX = bounds.Left - _scrollOffset + paint.MeasureText(textToStart);
var endX = bounds.Left - _scrollOffset + paint.MeasureText(textToEnd);
using var selPaint = new SKPaint
{
Color = SelectionColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(startX, bounds.Top, endX - startX, bounds.Height, selPaint);
}
private void DrawCursor(SKCanvas canvas, SKPaint paint, string displayText, SKRect bounds)
{
var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
var cursorX = bounds.Left - _scrollOffset + paint.MeasureText(textToCursor);
using var cursorPaint = new SKPaint
{
Color = CursorColor,
StrokeWidth = 2,
IsAntialias = true
};
canvas.DrawLine(cursorX, bounds.Top + 2, cursorX, bounds.Bottom - 2, cursorPaint);
}
private void ResetCursorBlink()
{
_cursorBlinkTime = DateTime.UtcNow;
_cursorVisible = true;
}
public void UpdateCursorBlink()
{
if (!IsFocused) return;
var elapsed = (DateTime.UtcNow - _cursorBlinkTime).TotalMilliseconds;
var newVisible = ((int)(elapsed / 500) % 2) == 0;
if (newVisible != _cursorVisible)
{
_cursorVisible = newVisible;
Invalidate();
}
}
public override void OnTextInput(TextInputEventArgs e)
{
if (!IsEnabled || IsReadOnly) return;
// Delete selection if any
if (_selectionLength > 0)
{
DeleteSelection();
}
// Check max length
if (MaxLength > 0 && _text.Length >= MaxLength)
return;
// Insert text at cursor
var insertText = e.Text;
if (MaxLength > 0)
{
var remaining = MaxLength - _text.Length;
insertText = insertText.Substring(0, Math.Min(insertText.Length, remaining));
}
var oldText = _text;
_text = _text.Insert(_cursorPosition, insertText);
_cursorPosition += insertText.Length;
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
ResetCursorBlink();
Invalidate();
}
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
switch (e.Key)
{
case Key.Backspace:
if (!IsReadOnly)
{
if (_selectionLength > 0)
{
DeleteSelection();
}
else if (_cursorPosition > 0)
{
var oldText = _text;
_text = _text.Remove(_cursorPosition - 1, 1);
_cursorPosition--;
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
}
ResetCursorBlink();
Invalidate();
}
e.Handled = true;
break;
case Key.Delete:
if (!IsReadOnly)
{
if (_selectionLength > 0)
{
DeleteSelection();
}
else if (_cursorPosition < _text.Length)
{
var oldText = _text;
_text = _text.Remove(_cursorPosition, 1);
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
}
ResetCursorBlink();
Invalidate();
}
e.Handled = true;
break;
case Key.Left:
if (_cursorPosition > 0)
{
if (e.Modifiers.HasFlag(KeyModifiers.Shift))
{
ExtendSelection(-1);
}
else
{
ClearSelection();
_cursorPosition--;
}
ResetCursorBlink();
Invalidate();
}
e.Handled = true;
break;
case Key.Right:
if (_cursorPosition < _text.Length)
{
if (e.Modifiers.HasFlag(KeyModifiers.Shift))
{
ExtendSelection(1);
}
else
{
ClearSelection();
_cursorPosition++;
}
ResetCursorBlink();
Invalidate();
}
e.Handled = true;
break;
case Key.Home:
if (e.Modifiers.HasFlag(KeyModifiers.Shift))
{
ExtendSelectionTo(0);
}
else
{
ClearSelection();
_cursorPosition = 0;
}
ResetCursorBlink();
Invalidate();
e.Handled = true;
break;
case Key.End:
if (e.Modifiers.HasFlag(KeyModifiers.Shift))
{
ExtendSelectionTo(_text.Length);
}
else
{
ClearSelection();
_cursorPosition = _text.Length;
}
ResetCursorBlink();
Invalidate();
e.Handled = true;
break;
case Key.A:
if (e.Modifiers.HasFlag(KeyModifiers.Control))
{
SelectAll();
e.Handled = true;
}
break;
case Key.C:
if (e.Modifiers.HasFlag(KeyModifiers.Control))
{
CopyToClipboard();
e.Handled = true;
}
break;
case Key.V:
if (e.Modifiers.HasFlag(KeyModifiers.Control) && !IsReadOnly)
{
PasteFromClipboard();
e.Handled = true;
}
break;
case Key.X:
if (e.Modifiers.HasFlag(KeyModifiers.Control) && !IsReadOnly)
{
CutToClipboard();
e.Handled = true;
}
break;
case Key.Enter:
Completed?.Invoke(this, EventArgs.Empty);
e.Handled = true;
break;
}
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
// Check if clicked on clear button
if (ShowClearButton && !string.IsNullOrEmpty(_text) && IsFocused)
{
var clearButtonSize = 20f;
var clearButtonMargin = 8f;
var clearCenterX = Bounds.Right - clearButtonMargin - clearButtonSize / 2;
var clearCenterY = Bounds.MidY;
var dx = e.X - clearCenterX;
var dy = e.Y - clearCenterY;
if (dx * dx + dy * dy < (clearButtonSize / 2) * (clearButtonSize / 2))
{
// Clear button clicked
var oldText = _text;
_text = "";
_cursorPosition = 0;
_selectionLength = 0;
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
Invalidate();
return;
}
}
// Calculate cursor position from click
var clickX = e.X - Bounds.Left - Padding.Left + _scrollOffset;
_cursorPosition = GetCharacterIndexAtX(clickX);
_selectionStart = _cursorPosition;
_selectionLength = 0;
ResetCursorBlink();
Invalidate();
}
private int GetCharacterIndexAtX(float x)
{
if (string.IsNullOrEmpty(_text)) return 0;
var fontStyle = GetFontStyle();
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font);
var displayText = GetDisplayText();
for (int i = 0; i <= displayText.Length; i++)
{
var substring = displayText.Substring(0, i);
var width = paint.MeasureText(substring);
if (width >= x)
{
// Check if closer to current or previous character
if (i > 0)
{
var prevWidth = paint.MeasureText(displayText.Substring(0, i - 1));
if (x - prevWidth < width - x)
return i - 1;
}
return i;
}
}
return displayText.Length;
}
private void DeleteSelection()
{
var start = Math.Min(_selectionStart, _selectionStart + _selectionLength);
var length = Math.Abs(_selectionLength);
var oldText = _text;
_text = _text.Remove(start, length);
_cursorPosition = start;
_selectionLength = 0;
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
}
private void ClearSelection()
{
_selectionLength = 0;
}
private void ExtendSelection(int delta)
{
if (_selectionLength == 0)
{
_selectionStart = _cursorPosition;
}
_cursorPosition += delta;
_selectionLength = _cursorPosition - _selectionStart;
}
private void ExtendSelectionTo(int position)
{
if (_selectionLength == 0)
{
_selectionStart = _cursorPosition;
}
_cursorPosition = position;
_selectionLength = _cursorPosition - _selectionStart;
}
public void SelectAll()
{
_selectionStart = 0;
_cursorPosition = _text.Length;
_selectionLength = _text.Length;
Invalidate();
}
private void CopyToClipboard()
{
if (_selectionLength == 0) return;
var start = Math.Min(_selectionStart, _selectionStart + _selectionLength);
var length = Math.Abs(_selectionLength);
var selectedText = _text.Substring(start, length);
// TODO: Implement actual clipboard using X11
// For now, store in a static field
ClipboardText = selectedText;
}
private void CutToClipboard()
{
CopyToClipboard();
DeleteSelection();
Invalidate();
}
private void PasteFromClipboard()
{
// TODO: Get from actual X11 clipboard
var text = ClipboardText;
if (string.IsNullOrEmpty(text)) return;
if (_selectionLength > 0)
{
DeleteSelection();
}
// Check max length
if (MaxLength > 0)
{
var remaining = MaxLength - _text.Length;
text = text.Substring(0, Math.Min(text.Length, remaining));
}
var oldText = _text;
_text = _text.Insert(_cursorPosition, text);
_cursorPosition += text.Length;
TextChanged?.Invoke(this, new TextChangedEventArgs(oldText, _text));
Invalidate();
}
// Temporary clipboard storage - will be replaced with X11 clipboard
private static string ClipboardText { get; set; } = "";
protected override SKSize MeasureOverride(SKSize availableSize)
{
var fontStyle = GetFontStyle();
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font);
var textBounds = new SKRect();
var measureText = !string.IsNullOrEmpty(_text) ? _text : Placeholder;
if (string.IsNullOrEmpty(measureText)) measureText = "Tg"; // Standard height measurement
paint.MeasureText(measureText, ref textBounds);
return new SKSize(
200, // Default width, will be overridden by layout
textBounds.Height + Padding.Top + Padding.Bottom + BorderWidth * 2);
}
}
/// <summary>
/// Event args for text changed events.
/// </summary>
public class TextChangedEventArgs : EventArgs
{
public string OldTextValue { get; }
public string NewTextValue { get; }
public TextChangedEventArgs(string oldText, string newText)
{
OldTextValue = oldText;
NewTextValue = newText;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// A page that displays a flyout menu and detail content.
/// </summary>
public class SkiaFlyoutPage : SkiaLayoutView
{
private SkiaView? _flyout;
private SkiaView? _detail;
private bool _isPresented = false;
private float _flyoutWidth = 300f;
private float _flyoutAnimationProgress = 0f;
private bool _gestureEnabled = true;
// Gesture tracking
private bool _isDragging = false;
private float _dragStartX;
private float _dragCurrentX;
/// <summary>
/// Gets or sets the flyout content (menu).
/// </summary>
public SkiaView? Flyout
{
get => _flyout;
set
{
if (_flyout != value)
{
if (_flyout != null)
{
RemoveChild(_flyout);
}
_flyout = value;
if (_flyout != null)
{
AddChild(_flyout);
}
Invalidate();
}
}
}
/// <summary>
/// Gets or sets the detail content (main content).
/// </summary>
public SkiaView? Detail
{
get => _detail;
set
{
if (_detail != value)
{
if (_detail != null)
{
RemoveChild(_detail);
}
_detail = value;
if (_detail != null)
{
AddChild(_detail);
}
Invalidate();
}
}
}
/// <summary>
/// Gets or sets whether the flyout is currently presented.
/// </summary>
public bool IsPresented
{
get => _isPresented;
set
{
if (_isPresented != value)
{
_isPresented = value;
_flyoutAnimationProgress = value ? 1f : 0f;
IsPresentedChanged?.Invoke(this, EventArgs.Empty);
Invalidate();
}
}
}
/// <summary>
/// Gets or sets the width of the flyout panel.
/// </summary>
public float FlyoutWidth
{
get => _flyoutWidth;
set
{
if (_flyoutWidth != value)
{
_flyoutWidth = Math.Max(100, value);
InvalidateMeasure();
Invalidate();
}
}
}
/// <summary>
/// Gets or sets whether swipe gestures are enabled.
/// </summary>
public bool GestureEnabled
{
get => _gestureEnabled;
set => _gestureEnabled = value;
}
/// <summary>
/// The flyout layout behavior.
/// </summary>
public FlyoutLayoutBehavior FlyoutLayoutBehavior { get; set; } = FlyoutLayoutBehavior.Default;
/// <summary>
/// Background color of the scrim when flyout is open.
/// </summary>
public SKColor ScrimColor { get; set; } = new SKColor(0, 0, 0, 100);
/// <summary>
/// Shadow width for the flyout.
/// </summary>
public float ShadowWidth { get; set; } = 8f;
/// <summary>
/// Event raised when IsPresented changes.
/// </summary>
public event EventHandler? IsPresentedChanged;
protected override SKSize MeasureOverride(SKSize availableSize)
{
// Measure flyout
if (_flyout != null)
{
_flyout.Measure(new SKSize(FlyoutWidth, availableSize.Height));
}
// Measure detail to full size
if (_detail != null)
{
_detail.Measure(availableSize);
}
return availableSize;
}
protected override SKRect ArrangeOverride(SKRect bounds)
{
// Arrange detail to fill the entire area
if (_detail != null)
{
_detail.Arrange(bounds);
}
// Arrange flyout (positioned based on animation progress)
if (_flyout != null)
{
float flyoutX = bounds.Left - FlyoutWidth + (FlyoutWidth * _flyoutAnimationProgress);
var flyoutBounds = new SKRect(
flyoutX,
bounds.Top,
flyoutX + FlyoutWidth,
bounds.Bottom);
_flyout.Arrange(flyoutBounds);
}
return bounds;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
canvas.Save();
canvas.ClipRect(bounds);
// Draw detail content first
_detail?.Draw(canvas);
// If flyout is visible, draw scrim and flyout
if (_flyoutAnimationProgress > 0)
{
// Draw scrim (semi-transparent overlay)
using var scrimPaint = new SKPaint
{
Color = ScrimColor.WithAlpha((byte)(ScrimColor.Alpha * _flyoutAnimationProgress)),
Style = SKPaintStyle.Fill
};
canvas.DrawRect(Bounds, scrimPaint);
// Draw flyout shadow
if (_flyout != null && ShadowWidth > 0)
{
DrawFlyoutShadow(canvas);
}
// Draw flyout
_flyout?.Draw(canvas);
}
canvas.Restore();
}
private void DrawFlyoutShadow(SKCanvas canvas)
{
if (_flyout == null) return;
float shadowRight = _flyout.Bounds.Right;
var shadowRect = new SKRect(
shadowRight,
Bounds.Top,
shadowRight + ShadowWidth,
Bounds.Bottom);
using var shadowPaint = new SKPaint
{
Shader = SKShader.CreateLinearGradient(
new SKPoint(shadowRect.Left, shadowRect.MidY),
new SKPoint(shadowRect.Right, shadowRect.MidY),
new SKColor[] { new SKColor(0, 0, 0, 60), SKColors.Transparent },
null,
SKShaderTileMode.Clamp)
};
canvas.DrawRect(shadowRect, shadowPaint);
}
public override SkiaView? HitTest(float x, float y)
{
if (!IsVisible || !Bounds.Contains(x, y)) return null;
// If flyout is presented, check if hit is in flyout
if (_flyoutAnimationProgress > 0 && _flyout != null)
{
var flyoutHit = _flyout.HitTest(x, y);
if (flyoutHit != null) return flyoutHit;
// Hit on scrim closes flyout
if (_isPresented)
{
return this; // Return self to handle scrim tap
}
}
// Check detail content
if (_detail != null)
{
var detailHit = _detail.HitTest(x, y);
if (detailHit != null) return detailHit;
}
return this;
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
// Check if tap is on scrim (outside flyout but flyout is open)
if (_isPresented && _flyout != null && !_flyout.Bounds.Contains(e.X, e.Y))
{
IsPresented = false;
e.Handled = true;
return;
}
// Start drag gesture
if (_gestureEnabled)
{
_isDragging = true;
_dragStartX = e.X;
_dragCurrentX = e.X;
}
base.OnPointerPressed(e);
}
public override void OnPointerMoved(PointerEventArgs e)
{
if (_isDragging && _gestureEnabled)
{
_dragCurrentX = e.X;
float delta = _dragCurrentX - _dragStartX;
// Calculate new animation progress
if (_isPresented)
{
// Dragging to close
_flyoutAnimationProgress = Math.Clamp(1f + (delta / FlyoutWidth), 0f, 1f);
}
else
{
// Dragging to open (only from left edge)
if (_dragStartX < 30)
{
_flyoutAnimationProgress = Math.Clamp(delta / FlyoutWidth, 0f, 1f);
}
}
Invalidate();
e.Handled = true;
}
base.OnPointerMoved(e);
}
public override void OnPointerReleased(PointerEventArgs e)
{
if (_isDragging)
{
_isDragging = false;
// Determine final state based on progress
if (_flyoutAnimationProgress > 0.5f)
{
_isPresented = true;
_flyoutAnimationProgress = 1f;
}
else
{
_isPresented = false;
_flyoutAnimationProgress = 0f;
}
IsPresentedChanged?.Invoke(this, EventArgs.Empty);
Invalidate();
}
base.OnPointerReleased(e);
}
/// <summary>
/// Toggles the flyout presentation state.
/// </summary>
public void ToggleFlyout()
{
IsPresented = !IsPresented;
}
}
/// <summary>
/// Defines how the flyout behaves.
/// </summary>
public enum FlyoutLayoutBehavior
{
/// <summary>
/// Default behavior based on device/window size.
/// </summary>
Default,
/// <summary>
/// Flyout slides over the detail content.
/// </summary>
Popover,
/// <summary>
/// Flyout and detail are shown side by side.
/// </summary>
Split,
/// <summary>
/// Flyout pushes the detail content.
/// </summary>
SplitOnLandscape,
/// <summary>
/// Flyout is always shown in portrait, side by side in landscape.
/// </summary>
SplitOnPortrait
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Graphics;
using Microsoft.Maui.Graphics.Skia;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered graphics view that supports IDrawable for custom drawing.
/// </summary>
public class SkiaGraphicsView : SkiaView
{
private IDrawable? _drawable;
public IDrawable? Drawable
{
get => _drawable;
set
{
_drawable = value;
Invalidate();
}
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw background
if (BackgroundColor != SKColors.Transparent)
{
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
}
// Draw using IDrawable
if (_drawable != null)
{
var dirtyRect = new RectF(bounds.Left, bounds.Top, bounds.Width, bounds.Height);
using var skiaCanvas = new SkiaCanvas();
skiaCanvas.Canvas = canvas;
_drawable.Draw(skiaCanvas, dirtyRect);
}
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
// Graphics view takes all available space by default
if (availableSize.Width < float.MaxValue && availableSize.Height < float.MaxValue)
{
return availableSize;
}
// Return a reasonable default size
return new SKSize(
availableSize.Width < float.MaxValue ? availableSize.Width : 100,
availableSize.Height < float.MaxValue ? availableSize.Height : 100);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Graphics;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered image control.
/// </summary>
public class SkiaImage : SkiaView
{
private SKBitmap? _bitmap;
private SKImage? _image;
private bool _isLoading;
public SKBitmap? Bitmap
{
get => _bitmap;
set
{
_bitmap?.Dispose();
_bitmap = value;
_image?.Dispose();
_image = value != null ? SKImage.FromBitmap(value) : null;
Invalidate();
}
}
public Aspect Aspect { get; set; } = Aspect.AspectFit;
public bool IsOpaque { get; set; }
public bool IsLoading => _isLoading;
public bool IsAnimationPlaying { get; set; }
public event EventHandler? ImageLoaded;
public event EventHandler<ImageLoadingErrorEventArgs>? ImageLoadingError;
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw background if not opaque
if (!IsOpaque && BackgroundColor != SKColors.Transparent)
{
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
}
if (_image == null) return;
var imageWidth = _image.Width;
var imageHeight = _image.Height;
if (imageWidth <= 0 || imageHeight <= 0) return;
var destRect = CalculateDestRect(bounds, imageWidth, imageHeight);
using var paint = new SKPaint
{
IsAntialias = true,
FilterQuality = SKFilterQuality.High
};
canvas.DrawImage(_image, destRect, paint);
}
private SKRect CalculateDestRect(SKRect bounds, float imageWidth, float imageHeight)
{
float destX, destY, destWidth, destHeight;
switch (Aspect)
{
case Aspect.Fill:
// Stretch to fill entire bounds
return bounds;
case Aspect.AspectFit:
// Scale to fit while maintaining aspect ratio
var fitScale = Math.Min(bounds.Width / imageWidth, bounds.Height / imageHeight);
destWidth = imageWidth * fitScale;
destHeight = imageHeight * fitScale;
destX = bounds.Left + (bounds.Width - destWidth) / 2;
destY = bounds.Top + (bounds.Height - destHeight) / 2;
return new SKRect(destX, destY, destX + destWidth, destY + destHeight);
case Aspect.AspectFill:
// Scale to fill while maintaining aspect ratio (may crop)
var fillScale = Math.Max(bounds.Width / imageWidth, bounds.Height / imageHeight);
destWidth = imageWidth * fillScale;
destHeight = imageHeight * fillScale;
destX = bounds.Left + (bounds.Width - destWidth) / 2;
destY = bounds.Top + (bounds.Height - destHeight) / 2;
return new SKRect(destX, destY, destX + destWidth, destY + destHeight);
case Aspect.Center:
// Center without scaling
destX = bounds.Left + (bounds.Width - imageWidth) / 2;
destY = bounds.Top + (bounds.Height - imageHeight) / 2;
return new SKRect(destX, destY, destX + imageWidth, destY + imageHeight);
default:
return bounds;
}
}
public async Task LoadFromFileAsync(string filePath)
{
_isLoading = true;
Invalidate();
try
{
await Task.Run(() =>
{
using var stream = File.OpenRead(filePath);
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
});
_isLoading = false;
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
_isLoading = false;
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
Invalidate();
}
public async Task LoadFromStreamAsync(Stream stream)
{
_isLoading = true;
Invalidate();
try
{
await Task.Run(() =>
{
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
});
_isLoading = false;
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
_isLoading = false;
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
Invalidate();
}
public async Task LoadFromUriAsync(Uri uri)
{
_isLoading = true;
Invalidate();
try
{
using var httpClient = new HttpClient();
var data = await httpClient.GetByteArrayAsync(uri);
using var stream = new MemoryStream(data);
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
_isLoading = false;
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
_isLoading = false;
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
Invalidate();
}
public void LoadFromData(byte[] data)
{
try
{
using var stream = new MemoryStream(data);
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
if (_image == null)
return new SKSize(100, 100); // Default size
var imageWidth = _image.Width;
var imageHeight = _image.Height;
// If we have constraints, respect them
if (availableSize.Width < float.MaxValue && availableSize.Height < float.MaxValue)
{
var scale = Math.Min(availableSize.Width / imageWidth, availableSize.Height / imageHeight);
return new SKSize(imageWidth * scale, imageHeight * scale);
}
else if (availableSize.Width < float.MaxValue)
{
var scale = availableSize.Width / imageWidth;
return new SKSize(availableSize.Width, imageHeight * scale);
}
else if (availableSize.Height < float.MaxValue)
{
var scale = availableSize.Height / imageHeight;
return new SKSize(imageWidth * scale, availableSize.Height);
}
return new SKSize(imageWidth, imageHeight);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
_bitmap?.Dispose();
_image?.Dispose();
}
base.Dispose(disposing);
}
}
/// <summary>
/// Event args for image loading errors.
/// </summary>
public class ImageLoadingErrorEventArgs : EventArgs
{
public Exception Exception { get; }
public ImageLoadingErrorEventArgs(Exception exception)
{
Exception = exception;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Graphics;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered image button control.
/// Combines button behavior with image display.
/// </summary>
public class SkiaImageButton : SkiaView
{
private SKBitmap? _bitmap;
private SKImage? _image;
private bool _isLoading;
public SKBitmap? Bitmap
{
get => _bitmap;
set
{
_bitmap?.Dispose();
_bitmap = value;
_image?.Dispose();
_image = value != null ? SKImage.FromBitmap(value) : null;
Invalidate();
}
}
// Image properties
public Aspect Aspect { get; set; } = Aspect.AspectFit;
public bool IsOpaque { get; set; }
public bool IsLoading => _isLoading;
// Button stroke properties
public SKColor StrokeColor { get; set; } = SKColors.Transparent;
public float StrokeThickness { get; set; } = 0;
public float CornerRadius { get; set; } = 0;
// Button state
public bool IsPressed { get; private set; }
public bool IsHovered { get; private set; }
// Visual state colors
public SKColor PressedBackgroundColor { get; set; } = new SKColor(0, 0, 0, 30);
public SKColor HoveredBackgroundColor { get; set; } = new SKColor(0, 0, 0, 15);
// Padding for the image content
public float PaddingLeft { get; set; }
public float PaddingTop { get; set; }
public float PaddingRight { get; set; }
public float PaddingBottom { get; set; }
public event EventHandler? Clicked;
public event EventHandler? Pressed;
public event EventHandler? Released;
public event EventHandler? ImageLoaded;
public event EventHandler<ImageLoadingErrorEventArgs>? ImageLoadingError;
public SkiaImageButton()
{
IsFocusable = true;
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Apply padding
var contentBounds = new SKRect(
bounds.Left + PaddingLeft,
bounds.Top + PaddingTop,
bounds.Right - PaddingRight,
bounds.Bottom - PaddingBottom);
// Draw background based on state
if (IsPressed || IsHovered || !IsOpaque && BackgroundColor != SKColors.Transparent)
{
var bgColor = IsPressed ? PressedBackgroundColor
: IsHovered ? HoveredBackgroundColor
: BackgroundColor;
using var bgPaint = new SKPaint
{
Color = bgColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
if (CornerRadius > 0)
{
var roundRect = new SKRoundRect(bounds, CornerRadius);
canvas.DrawRoundRect(roundRect, bgPaint);
}
else
{
canvas.DrawRect(bounds, bgPaint);
}
}
// Draw image
if (_image != null)
{
var imageWidth = _image.Width;
var imageHeight = _image.Height;
if (imageWidth > 0 && imageHeight > 0)
{
var destRect = CalculateDestRect(contentBounds, imageWidth, imageHeight);
using var paint = new SKPaint
{
IsAntialias = true,
FilterQuality = SKFilterQuality.High
};
// Apply opacity when disabled
if (!IsEnabled)
{
paint.Color = paint.Color.WithAlpha(128);
}
canvas.DrawImage(_image, destRect, paint);
}
}
// Draw stroke/border
if (StrokeThickness > 0 && StrokeColor != SKColors.Transparent)
{
using var strokePaint = new SKPaint
{
Color = StrokeColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = StrokeThickness,
IsAntialias = true
};
if (CornerRadius > 0)
{
var roundRect = new SKRoundRect(bounds, CornerRadius);
canvas.DrawRoundRect(roundRect, strokePaint);
}
else
{
canvas.DrawRect(bounds, strokePaint);
}
}
// Draw focus ring
if (IsFocused)
{
using var focusPaint = new SKPaint
{
Color = new SKColor(0x00, 0x00, 0x00, 0x40),
Style = SKPaintStyle.Stroke,
StrokeWidth = 2,
IsAntialias = true
};
var focusBounds = new SKRect(bounds.Left - 2, bounds.Top - 2, bounds.Right + 2, bounds.Bottom + 2);
if (CornerRadius > 0)
{
var focusRect = new SKRoundRect(focusBounds, CornerRadius + 2);
canvas.DrawRoundRect(focusRect, focusPaint);
}
else
{
canvas.DrawRect(focusBounds, focusPaint);
}
}
}
private SKRect CalculateDestRect(SKRect bounds, float imageWidth, float imageHeight)
{
float destX, destY, destWidth, destHeight;
switch (Aspect)
{
case Aspect.Fill:
return bounds;
case Aspect.AspectFit:
var fitScale = Math.Min(bounds.Width / imageWidth, bounds.Height / imageHeight);
destWidth = imageWidth * fitScale;
destHeight = imageHeight * fitScale;
destX = bounds.Left + (bounds.Width - destWidth) / 2;
destY = bounds.Top + (bounds.Height - destHeight) / 2;
return new SKRect(destX, destY, destX + destWidth, destY + destHeight);
case Aspect.AspectFill:
var fillScale = Math.Max(bounds.Width / imageWidth, bounds.Height / imageHeight);
destWidth = imageWidth * fillScale;
destHeight = imageHeight * fillScale;
destX = bounds.Left + (bounds.Width - destWidth) / 2;
destY = bounds.Top + (bounds.Height - destHeight) / 2;
return new SKRect(destX, destY, destX + destWidth, destY + destHeight);
case Aspect.Center:
destX = bounds.Left + (bounds.Width - imageWidth) / 2;
destY = bounds.Top + (bounds.Height - imageHeight) / 2;
return new SKRect(destX, destY, destX + imageWidth, destY + imageHeight);
default:
return bounds;
}
}
// Image loading methods
public async Task LoadFromFileAsync(string filePath)
{
_isLoading = true;
Invalidate();
try
{
await Task.Run(() =>
{
using var stream = File.OpenRead(filePath);
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
});
_isLoading = false;
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
_isLoading = false;
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
Invalidate();
}
public async Task LoadFromStreamAsync(Stream stream)
{
_isLoading = true;
Invalidate();
try
{
await Task.Run(() =>
{
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
});
_isLoading = false;
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
_isLoading = false;
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
Invalidate();
}
public async Task LoadFromUriAsync(Uri uri)
{
_isLoading = true;
Invalidate();
try
{
using var httpClient = new HttpClient();
var data = await httpClient.GetByteArrayAsync(uri);
using var stream = new MemoryStream(data);
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
_isLoading = false;
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
_isLoading = false;
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
Invalidate();
}
public void LoadFromData(byte[] data)
{
try
{
using var stream = new MemoryStream(data);
var bitmap = SKBitmap.Decode(stream);
if (bitmap != null)
{
Bitmap = bitmap;
}
ImageLoaded?.Invoke(this, EventArgs.Empty);
}
catch (Exception ex)
{
ImageLoadingError?.Invoke(this, new ImageLoadingErrorEventArgs(ex));
}
}
// Pointer event handlers
public override void OnPointerEntered(PointerEventArgs e)
{
if (!IsEnabled) return;
IsHovered = true;
Invalidate();
}
public override void OnPointerExited(PointerEventArgs e)
{
IsHovered = false;
if (IsPressed)
{
IsPressed = false;
}
Invalidate();
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
IsPressed = true;
Invalidate();
Pressed?.Invoke(this, EventArgs.Empty);
}
public override void OnPointerReleased(PointerEventArgs e)
{
if (!IsEnabled) return;
var wasPressed = IsPressed;
IsPressed = false;
Invalidate();
Released?.Invoke(this, EventArgs.Empty);
if (wasPressed && Bounds.Contains(new SKPoint(e.X, e.Y)))
{
Clicked?.Invoke(this, EventArgs.Empty);
}
}
// Keyboard event handlers
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
if (e.Key == Key.Enter || e.Key == Key.Space)
{
IsPressed = true;
Invalidate();
Pressed?.Invoke(this, EventArgs.Empty);
e.Handled = true;
}
}
public override void OnKeyUp(KeyEventArgs e)
{
if (!IsEnabled) return;
if (e.Key == Key.Enter || e.Key == Key.Space)
{
if (IsPressed)
{
IsPressed = false;
Invalidate();
Released?.Invoke(this, EventArgs.Empty);
Clicked?.Invoke(this, EventArgs.Empty);
}
e.Handled = true;
}
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
var padding = new SKSize(PaddingLeft + PaddingRight, PaddingTop + PaddingBottom);
if (_image == null)
return new SKSize(44 + padding.Width, 44 + padding.Height); // Default touch target size
var imageWidth = _image.Width;
var imageHeight = _image.Height;
if (availableSize.Width < float.MaxValue && availableSize.Height < float.MaxValue)
{
var availableContent = new SKSize(
availableSize.Width - padding.Width,
availableSize.Height - padding.Height);
var scale = Math.Min(availableContent.Width / imageWidth, availableContent.Height / imageHeight);
return new SKSize(imageWidth * scale + padding.Width, imageHeight * scale + padding.Height);
}
else if (availableSize.Width < float.MaxValue)
{
var availableWidth = availableSize.Width - padding.Width;
var scale = availableWidth / imageWidth;
return new SKSize(availableSize.Width, imageHeight * scale + padding.Height);
}
else if (availableSize.Height < float.MaxValue)
{
var availableHeight = availableSize.Height - padding.Height;
var scale = availableHeight / imageHeight;
return new SKSize(imageWidth * scale + padding.Width, availableSize.Height);
}
return new SKSize(imageWidth + padding.Width, imageHeight + padding.Height);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
_bitmap?.Dispose();
_image?.Dispose();
}
base.Dispose(disposing);
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// A view that displays indicators for a collection of items.
/// Used to show page indicators for CarouselView or similar controls.
/// </summary>
public class SkiaIndicatorView : SkiaView
{
private int _count = 0;
private int _position = 0;
/// <summary>
/// Gets or sets the number of indicators to display.
/// </summary>
public int Count
{
get => _count;
set
{
if (_count != value)
{
_count = Math.Max(0, value);
if (_position >= _count)
{
_position = Math.Max(0, _count - 1);
}
InvalidateMeasure();
Invalidate();
}
}
}
/// <summary>
/// Gets or sets the selected position.
/// </summary>
public int Position
{
get => _position;
set
{
int newValue = Math.Clamp(value, 0, Math.Max(0, _count - 1));
if (_position != newValue)
{
_position = newValue;
Invalidate();
}
}
}
/// <summary>
/// Gets or sets the indicator color.
/// </summary>
public SKColor IndicatorColor { get; set; } = new SKColor(180, 180, 180);
/// <summary>
/// Gets or sets the selected indicator color.
/// </summary>
public SKColor SelectedIndicatorColor { get; set; } = new SKColor(33, 150, 243);
/// <summary>
/// Gets or sets the indicator size.
/// </summary>
public float IndicatorSize { get; set; } = 10f;
/// <summary>
/// Gets or sets the selected indicator size.
/// </summary>
public float SelectedIndicatorSize { get; set; } = 10f;
/// <summary>
/// Gets or sets the spacing between indicators.
/// </summary>
public float IndicatorSpacing { get; set; } = 8f;
/// <summary>
/// Gets or sets the indicator shape.
/// </summary>
public IndicatorShape IndicatorShape { get; set; } = IndicatorShape.Circle;
/// <summary>
/// Gets or sets whether indicators should have a border.
/// </summary>
public bool ShowBorder { get; set; } = false;
/// <summary>
/// Gets or sets the border color.
/// </summary>
public SKColor BorderColor { get; set; } = new SKColor(100, 100, 100);
/// <summary>
/// Gets or sets the border width.
/// </summary>
public float BorderWidth { get; set; } = 1f;
/// <summary>
/// Gets or sets the maximum visible indicators.
/// </summary>
public int MaximumVisible { get; set; } = 10;
/// <summary>
/// Gets or sets whether to hide indicators when count is 1 or less.
/// </summary>
public bool HideSingle { get; set; } = true;
protected override SKSize MeasureOverride(SKSize availableSize)
{
if (_count <= 0 || (HideSingle && _count <= 1))
{
return SKSize.Empty;
}
int visibleCount = Math.Min(_count, MaximumVisible);
float totalWidth = visibleCount * IndicatorSize + (visibleCount - 1) * IndicatorSpacing;
float height = Math.Max(IndicatorSize, SelectedIndicatorSize);
return new SKSize(totalWidth, height);
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
if (_count <= 0 || (HideSingle && _count <= 1)) return;
canvas.Save();
canvas.ClipRect(Bounds);
int visibleCount = Math.Min(_count, MaximumVisible);
float totalWidth = visibleCount * IndicatorSize + (visibleCount - 1) * IndicatorSpacing;
float startX = Bounds.MidX - totalWidth / 2 + IndicatorSize / 2;
float centerY = Bounds.MidY;
// Determine visible range if count > MaximumVisible
int startIndex = 0;
int endIndex = visibleCount;
if (_count > MaximumVisible)
{
int halfVisible = MaximumVisible / 2;
startIndex = Math.Max(0, _position - halfVisible);
endIndex = Math.Min(_count, startIndex + MaximumVisible);
if (endIndex == _count)
{
startIndex = _count - MaximumVisible;
}
}
using var normalPaint = new SKPaint
{
Color = IndicatorColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
using var selectedPaint = new SKPaint
{
Color = SelectedIndicatorColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
using var borderPaint = new SKPaint
{
Color = BorderColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = BorderWidth,
IsAntialias = true
};
for (int i = startIndex; i < endIndex; i++)
{
int visualIndex = i - startIndex;
float x = startX + visualIndex * (IndicatorSize + IndicatorSpacing);
bool isSelected = i == _position;
var paint = isSelected ? selectedPaint : normalPaint;
float size = isSelected ? SelectedIndicatorSize : IndicatorSize;
DrawIndicator(canvas, x, centerY, size, paint, borderPaint);
}
canvas.Restore();
}
private void DrawIndicator(SKCanvas canvas, float x, float y, float size, SKPaint fillPaint, SKPaint borderPaint)
{
float radius = size / 2;
switch (IndicatorShape)
{
case IndicatorShape.Circle:
canvas.DrawCircle(x, y, radius, fillPaint);
if (ShowBorder)
{
canvas.DrawCircle(x, y, radius, borderPaint);
}
break;
case IndicatorShape.Square:
var rect = new SKRect(x - radius, y - radius, x + radius, y + radius);
canvas.DrawRect(rect, fillPaint);
if (ShowBorder)
{
canvas.DrawRect(rect, borderPaint);
}
break;
case IndicatorShape.RoundedSquare:
var roundRect = new SKRect(x - radius, y - radius, x + radius, y + radius);
float cornerRadius = radius * 0.3f;
canvas.DrawRoundRect(roundRect, cornerRadius, cornerRadius, fillPaint);
if (ShowBorder)
{
canvas.DrawRoundRect(roundRect, cornerRadius, cornerRadius, borderPaint);
}
break;
case IndicatorShape.Diamond:
using (var path = new SKPath())
{
path.MoveTo(x, y - radius);
path.LineTo(x + radius, y);
path.LineTo(x, y + radius);
path.LineTo(x - radius, y);
path.Close();
canvas.DrawPath(path, fillPaint);
if (ShowBorder)
{
canvas.DrawPath(path, borderPaint);
}
}
break;
}
}
public override SkiaView? HitTest(float x, float y)
{
if (!IsVisible || !Bounds.Contains(x, y)) return null;
// Check if click is on an indicator
if (_count > 0)
{
int visibleCount = Math.Min(_count, MaximumVisible);
float totalWidth = visibleCount * IndicatorSize + (visibleCount - 1) * IndicatorSpacing;
float startX = Bounds.MidX - totalWidth / 2;
int startIndex = 0;
if (_count > MaximumVisible)
{
int halfVisible = MaximumVisible / 2;
startIndex = Math.Max(0, _position - halfVisible);
if (startIndex + MaximumVisible > _count)
{
startIndex = _count - MaximumVisible;
}
}
for (int i = 0; i < visibleCount; i++)
{
float indicatorX = startX + i * (IndicatorSize + IndicatorSpacing);
if (x >= indicatorX && x <= indicatorX + IndicatorSize)
{
return this;
}
}
}
return null;
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled || _count <= 0) return;
// Calculate which indicator was clicked
int visibleCount = Math.Min(_count, MaximumVisible);
float totalWidth = visibleCount * IndicatorSize + (visibleCount - 1) * IndicatorSpacing;
float startX = Bounds.MidX - totalWidth / 2;
int startIndex = 0;
if (_count > MaximumVisible)
{
int halfVisible = MaximumVisible / 2;
startIndex = Math.Max(0, _position - halfVisible);
if (startIndex + MaximumVisible > _count)
{
startIndex = _count - MaximumVisible;
}
}
float relativeX = e.X - startX;
int visualIndex = (int)(relativeX / (IndicatorSize + IndicatorSpacing));
if (visualIndex >= 0 && visualIndex < visibleCount)
{
Position = startIndex + visualIndex;
e.Handled = true;
}
base.OnPointerPressed(e);
}
}
/// <summary>
/// Shape of indicator dots.
/// </summary>
public enum IndicatorShape
{
Circle,
Square,
RoundedSquare,
Diamond
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using System.Collections;
using System.Collections.Specialized;
using Microsoft.Maui.Graphics;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Base class for Skia-rendered items views (CollectionView, ListView).
/// Provides item rendering, scrolling, and virtualization.
/// </summary>
public class SkiaItemsView : SkiaView
{
private IEnumerable? _itemsSource;
private List<object> _items = new();
protected float _scrollOffset;
private float _itemHeight = 44; // Default item height
private float _itemSpacing = 0;
private int _firstVisibleIndex;
private int _lastVisibleIndex;
private bool _isDragging;
private float _dragStartY;
private float _dragStartOffset;
private float _velocity;
private DateTime _lastDragTime;
// Scroll bar
private bool _showVerticalScrollBar = true;
private float _scrollBarWidth = 8;
private SKColor _scrollBarColor = new SKColor(128, 128, 128, 128);
private SKColor _scrollBarTrackColor = new SKColor(200, 200, 200, 64);
public IEnumerable? ItemsSource
{
get => _itemsSource;
set
{
if (_itemsSource is INotifyCollectionChanged oldCollection)
{
oldCollection.CollectionChanged -= OnCollectionChanged;
}
_itemsSource = value;
RefreshItems();
if (_itemsSource is INotifyCollectionChanged newCollection)
{
newCollection.CollectionChanged += OnCollectionChanged;
}
Invalidate();
}
}
public float ItemHeight
{
get => _itemHeight;
set
{
_itemHeight = value;
Invalidate();
}
}
public float ItemSpacing
{
get => _itemSpacing;
set
{
_itemSpacing = value;
Invalidate();
}
}
public ScrollBarVisibility VerticalScrollBarVisibility { get; set; } = ScrollBarVisibility.Default;
public ScrollBarVisibility HorizontalScrollBarVisibility { get; set; } = ScrollBarVisibility.Never;
public object? EmptyView { get; set; }
public string? EmptyViewText { get; set; } = "No items";
// Item rendering delegate
public Func<object, int, SKRect, SKCanvas, SKPaint, bool>? ItemRenderer { get; set; }
// Selection support (overridden in SkiaCollectionView)
public virtual int SelectedIndex { get; set; } = -1;
public event EventHandler<ItemsScrolledEventArgs>? Scrolled;
public event EventHandler<ItemsViewItemTappedEventArgs>? ItemTapped;
public SkiaItemsView()
{
IsFocusable = true;
}
private void RefreshItems()
{
_items.Clear();
if (_itemsSource != null)
{
foreach (var item in _itemsSource)
{
_items.Add(item);
}
}
_scrollOffset = 0;
}
private void OnCollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
{
RefreshItems();
Invalidate();
}
protected float TotalContentHeight => _items.Count * (_itemHeight + _itemSpacing) - _itemSpacing;
protected float MaxScrollOffset => Math.Max(0, TotalContentHeight - Bounds.Height);
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw background
if (BackgroundColor != SKColors.Transparent)
{
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
}
// If no items, show empty view
if (_items.Count == 0)
{
DrawEmptyView(canvas, bounds);
return;
}
// Calculate visible range
_firstVisibleIndex = Math.Max(0, (int)(_scrollOffset / (_itemHeight + _itemSpacing)));
_lastVisibleIndex = Math.Min(_items.Count - 1,
(int)((_scrollOffset + bounds.Height) / (_itemHeight + _itemSpacing)) + 1);
// Clip to bounds
canvas.Save();
canvas.ClipRect(bounds);
// Draw visible items
using var paint = new SKPaint
{
IsAntialias = true
};
for (int i = _firstVisibleIndex; i <= _lastVisibleIndex; i++)
{
var itemY = bounds.Top + (i * (_itemHeight + _itemSpacing)) - _scrollOffset;
var itemRect = new SKRect(bounds.Left, itemY, bounds.Right - (_showVerticalScrollBar ? _scrollBarWidth : 0), itemY + _itemHeight);
if (itemRect.Bottom < bounds.Top || itemRect.Top > bounds.Bottom)
continue;
DrawItem(canvas, _items[i], i, itemRect, paint);
}
canvas.Restore();
// Draw scrollbar
if (_showVerticalScrollBar && TotalContentHeight > bounds.Height)
{
DrawScrollBar(canvas, bounds);
}
}
protected virtual void DrawItem(SKCanvas canvas, object item, int index, SKRect bounds, SKPaint paint)
{
// Draw selection highlight
if (index == SelectedIndex)
{
paint.Color = new SKColor(0x21, 0x96, 0xF3, 0x40); // Light blue
paint.Style = SKPaintStyle.Fill;
canvas.DrawRect(bounds, paint);
}
// Draw separator
paint.Color = new SKColor(0xE0, 0xE0, 0xE0);
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = 1;
canvas.DrawLine(bounds.Left, bounds.Bottom, bounds.Right, bounds.Bottom, paint);
// Use custom renderer if provided
if (ItemRenderer != null)
{
if (ItemRenderer(item, index, bounds, canvas, paint))
return;
}
// Default rendering - just show ToString
paint.Color = SKColors.Black;
paint.Style = SKPaintStyle.Fill;
using var font = new SKFont(SKTypeface.Default, 14);
using var textPaint = new SKPaint(font)
{
Color = SKColors.Black,
IsAntialias = true
};
var text = item?.ToString() ?? "";
var textBounds = new SKRect();
textPaint.MeasureText(text, ref textBounds);
var x = bounds.Left + 16;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(text, x, y, textPaint);
}
protected virtual void DrawEmptyView(SKCanvas canvas, SKRect bounds)
{
using var paint = new SKPaint
{
Color = new SKColor(0x80, 0x80, 0x80),
IsAntialias = true
};
using var font = new SKFont(SKTypeface.Default, 16);
using var textPaint = new SKPaint(font)
{
Color = new SKColor(0x80, 0x80, 0x80),
IsAntialias = true
};
var text = EmptyViewText ?? "No items";
var textBounds = new SKRect();
textPaint.MeasureText(text, ref textBounds);
var x = bounds.MidX - textBounds.MidX;
var y = bounds.MidY - textBounds.MidY;
canvas.DrawText(text, x, y, textPaint);
}
private void DrawScrollBar(SKCanvas canvas, SKRect bounds)
{
var trackRect = new SKRect(
bounds.Right - _scrollBarWidth,
bounds.Top,
bounds.Right,
bounds.Bottom);
// Draw track
using var trackPaint = new SKPaint
{
Color = _scrollBarTrackColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(trackRect, trackPaint);
// Calculate thumb size and position
var viewportRatio = bounds.Height / TotalContentHeight;
var thumbHeight = Math.Max(20, bounds.Height * viewportRatio);
var scrollRatio = _scrollOffset / MaxScrollOffset;
var thumbY = bounds.Top + (bounds.Height - thumbHeight) * scrollRatio;
var thumbRect = new SKRect(
bounds.Right - _scrollBarWidth + 1,
thumbY,
bounds.Right - 1,
thumbY + thumbHeight);
// Draw thumb
using var thumbPaint = new SKPaint
{
Color = _scrollBarColor,
Style = SKPaintStyle.Fill,
IsAntialias = true
};
var cornerRadius = (_scrollBarWidth - 2) / 2;
canvas.DrawRoundRect(new SKRoundRect(thumbRect, cornerRadius), thumbPaint);
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
_isDragging = true;
_dragStartY = e.Y;
_dragStartOffset = _scrollOffset;
_lastDragTime = DateTime.Now;
_velocity = 0;
}
public override void OnPointerMoved(PointerEventArgs e)
{
if (!_isDragging) return;
var delta = _dragStartY - e.Y;
var newOffset = _dragStartOffset + delta;
// Calculate velocity for momentum scrolling
var now = DateTime.Now;
var timeDelta = (now - _lastDragTime).TotalSeconds;
if (timeDelta > 0)
{
_velocity = (float)((_scrollOffset - newOffset) / timeDelta);
}
_lastDragTime = now;
SetScrollOffset(newOffset);
}
public override void OnPointerReleased(PointerEventArgs e)
{
if (_isDragging)
{
_isDragging = false;
// Check for tap (minimal movement)
var totalDrag = Math.Abs(e.Y - _dragStartY);
if (totalDrag < 5)
{
// This was a tap - find which item was tapped
var tapY = e.Y + _scrollOffset - Bounds.Top;
var tappedIndex = (int)(tapY / (_itemHeight + _itemSpacing));
if (tappedIndex >= 0 && tappedIndex < _items.Count)
{
OnItemTapped(tappedIndex, _items[tappedIndex]);
}
}
}
}
protected virtual void OnItemTapped(int index, object item)
{
SelectedIndex = index;
ItemTapped?.Invoke(this, new ItemsViewItemTappedEventArgs(index, item));
Invalidate();
}
public override void OnScroll(ScrollEventArgs e)
{
var delta = e.DeltaY * 20;
SetScrollOffset(_scrollOffset + delta);
e.Handled = true;
}
private void SetScrollOffset(float offset)
{
var oldOffset = _scrollOffset;
_scrollOffset = Math.Clamp(offset, 0, MaxScrollOffset);
if (Math.Abs(_scrollOffset - oldOffset) > 0.1f)
{
Scrolled?.Invoke(this, new ItemsScrolledEventArgs(_scrollOffset, TotalContentHeight));
Invalidate();
}
}
public void ScrollToIndex(int index, bool animate = true)
{
if (index < 0 || index >= _items.Count) return;
var targetOffset = index * (_itemHeight + _itemSpacing);
SetScrollOffset(targetOffset);
}
public void ScrollToItem(object item, bool animate = true)
{
var index = _items.IndexOf(item);
if (index >= 0)
{
ScrollToIndex(index, animate);
}
}
public override void OnKeyDown(KeyEventArgs e)
{
if (!IsEnabled) return;
switch (e.Key)
{
case Key.Up:
if (SelectedIndex > 0)
{
SelectedIndex--;
EnsureIndexVisible(SelectedIndex);
Invalidate();
}
e.Handled = true;
break;
case Key.Down:
if (SelectedIndex < _items.Count - 1)
{
SelectedIndex++;
EnsureIndexVisible(SelectedIndex);
Invalidate();
}
e.Handled = true;
break;
case Key.PageUp:
SetScrollOffset(_scrollOffset - Bounds.Height);
e.Handled = true;
break;
case Key.PageDown:
SetScrollOffset(_scrollOffset + Bounds.Height);
e.Handled = true;
break;
case Key.Home:
SelectedIndex = 0;
SetScrollOffset(0);
Invalidate();
e.Handled = true;
break;
case Key.End:
SelectedIndex = _items.Count - 1;
SetScrollOffset(MaxScrollOffset);
Invalidate();
e.Handled = true;
break;
case Key.Enter:
if (SelectedIndex >= 0 && SelectedIndex < _items.Count)
{
OnItemTapped(SelectedIndex, _items[SelectedIndex]);
}
e.Handled = true;
break;
}
}
private void EnsureIndexVisible(int index)
{
var itemTop = index * (_itemHeight + _itemSpacing);
var itemBottom = itemTop + _itemHeight;
if (itemTop < _scrollOffset)
{
SetScrollOffset(itemTop);
}
else if (itemBottom > _scrollOffset + Bounds.Height)
{
SetScrollOffset(itemBottom - Bounds.Height);
}
}
protected int ItemCount => _items.Count;
protected object? GetItemAt(int index) => index >= 0 && index < _items.Count ? _items[index] : null;
protected override SKSize MeasureOverride(SKSize availableSize)
{
// Items view takes all available space
return new SKSize(
availableSize.Width < float.MaxValue ? availableSize.Width : 200,
availableSize.Height < float.MaxValue ? availableSize.Height : 300);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_itemsSource is INotifyCollectionChanged collection)
{
collection.CollectionChanged -= OnCollectionChanged;
}
}
base.Dispose(disposing);
}
}
/// <summary>
/// Event args for items view scroll events.
/// </summary>
public class ItemsScrolledEventArgs : EventArgs
{
public float ScrollOffset { get; }
public float TotalHeight { get; }
public ItemsScrolledEventArgs(float scrollOffset, float totalHeight)
{
ScrollOffset = scrollOffset;
TotalHeight = totalHeight;
}
}
/// <summary>
/// Event args for items view item tap events.
/// </summary>
public class ItemsViewItemTappedEventArgs : EventArgs
{
public int Index { get; }
public object Item { get; }
public ItemsViewItemTappedEventArgs(int index, object item)
{
Index = index;
Item = item;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Platform.Linux.Rendering;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered label control for displaying text.
/// </summary>
public class SkiaLabel : SkiaView
{
public string Text { get; set; } = "";
public SKColor TextColor { get; set; } = SKColors.Black;
public string FontFamily { get; set; } = "Sans";
public float FontSize { get; set; } = 14;
public bool IsBold { get; set; }
public bool IsItalic { get; set; }
public bool IsUnderline { get; set; }
public bool IsStrikethrough { get; set; }
public TextAlignment HorizontalTextAlignment { get; set; } = TextAlignment.Start;
public TextAlignment VerticalTextAlignment { get; set; } = TextAlignment.Center;
public LineBreakMode LineBreakMode { get; set; } = LineBreakMode.TailTruncation;
public int MaxLines { get; set; } = 0; // 0 = unlimited
public float LineHeight { get; set; } = 1.2f;
public float CharacterSpacing { get; set; }
public SkiaTextAlignment HorizontalAlignment
{
get => HorizontalTextAlignment switch
{
TextAlignment.Start => SkiaTextAlignment.Left,
TextAlignment.Center => SkiaTextAlignment.Center,
TextAlignment.End => SkiaTextAlignment.Right,
_ => SkiaTextAlignment.Left
};
set => HorizontalTextAlignment = value switch
{
SkiaTextAlignment.Left => TextAlignment.Start,
SkiaTextAlignment.Center => TextAlignment.Center,
SkiaTextAlignment.Right => TextAlignment.End,
_ => TextAlignment.Start
};
}
public SkiaVerticalAlignment VerticalAlignment
{
get => VerticalTextAlignment switch
{
TextAlignment.Start => SkiaVerticalAlignment.Top,
TextAlignment.Center => SkiaVerticalAlignment.Center,
TextAlignment.End => SkiaVerticalAlignment.Bottom,
_ => SkiaVerticalAlignment.Top
};
set => VerticalTextAlignment = value switch
{
SkiaVerticalAlignment.Top => TextAlignment.Start,
SkiaVerticalAlignment.Center => TextAlignment.Center,
SkiaVerticalAlignment.Bottom => TextAlignment.End,
_ => TextAlignment.Start
};
}
public SKRect Padding { get; set; } = new SKRect(0, 0, 0, 0);
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
if (string.IsNullOrEmpty(Text))
return;
var fontStyle = new SKFontStyle(
IsBold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal,
SKFontStyleWidth.Normal,
IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font)
{
Color = IsEnabled ? TextColor : TextColor.WithAlpha(128),
IsAntialias = true
};
// Calculate content bounds with padding
var contentBounds = new SKRect(
bounds.Left + Padding.Left,
bounds.Top + Padding.Top,
bounds.Right - Padding.Right,
bounds.Bottom - Padding.Bottom);
// Handle single line vs multiline
if (MaxLines == 1 || !Text.Contains('\n'))
{
DrawSingleLine(canvas, paint, font, contentBounds);
}
else
{
DrawMultiLine(canvas, paint, font, contentBounds);
}
}
private void DrawSingleLine(SKCanvas canvas, SKPaint paint, SKFont font, SKRect bounds)
{
var displayText = Text;
// Measure text
var textBounds = new SKRect();
paint.MeasureText(displayText, ref textBounds);
// Apply truncation if needed
if (textBounds.Width > bounds.Width && LineBreakMode == LineBreakMode.TailTruncation)
{
displayText = TruncateText(paint, displayText, bounds.Width);
paint.MeasureText(displayText, ref textBounds);
}
// Calculate position based on alignment
float x = HorizontalTextAlignment switch
{
TextAlignment.Start => bounds.Left,
TextAlignment.Center => bounds.MidX - textBounds.Width / 2,
TextAlignment.End => bounds.Right - textBounds.Width,
_ => bounds.Left
};
float y = VerticalTextAlignment switch
{
TextAlignment.Start => bounds.Top - textBounds.Top,
TextAlignment.Center => bounds.MidY - textBounds.MidY,
TextAlignment.End => bounds.Bottom - textBounds.Bottom,
_ => bounds.MidY - textBounds.MidY
};
canvas.DrawText(displayText, x, y, paint);
// Draw underline if needed
if (IsUnderline)
{
using var linePaint = new SKPaint
{
Color = paint.Color,
StrokeWidth = 1,
IsAntialias = true
};
var underlineY = y + 2;
canvas.DrawLine(x, underlineY, x + textBounds.Width, underlineY, linePaint);
}
// Draw strikethrough if needed
if (IsStrikethrough)
{
using var linePaint = new SKPaint
{
Color = paint.Color,
StrokeWidth = 1,
IsAntialias = true
};
var strikeY = y - textBounds.Height / 3;
canvas.DrawLine(x, strikeY, x + textBounds.Width, strikeY, linePaint);
}
}
private void DrawMultiLine(SKCanvas canvas, SKPaint paint, SKFont font, SKRect bounds)
{
var lines = Text.Split('\n');
var lineSpacing = FontSize * LineHeight;
var maxLinesToDraw = MaxLines > 0 ? Math.Min(MaxLines, lines.Length) : lines.Length;
// Calculate total height
var totalHeight = maxLinesToDraw * lineSpacing;
// Calculate starting Y based on vertical alignment
float startY = VerticalTextAlignment switch
{
TextAlignment.Start => bounds.Top + FontSize,
TextAlignment.Center => bounds.MidY - totalHeight / 2 + FontSize,
TextAlignment.End => bounds.Bottom - totalHeight + FontSize,
_ => bounds.Top + FontSize
};
for (int i = 0; i < maxLinesToDraw; i++)
{
var line = lines[i];
// Add ellipsis if this is the last line and there are more
if (i == maxLinesToDraw - 1 && i < lines.Length - 1 && LineBreakMode == LineBreakMode.TailTruncation)
{
line = TruncateText(paint, line, bounds.Width);
}
var textBounds = new SKRect();
paint.MeasureText(line, ref textBounds);
float x = HorizontalTextAlignment switch
{
TextAlignment.Start => bounds.Left,
TextAlignment.Center => bounds.MidX - textBounds.Width / 2,
TextAlignment.End => bounds.Right - textBounds.Width,
_ => bounds.Left
};
float y = startY + i * lineSpacing;
if (y > bounds.Bottom)
break;
canvas.DrawText(line, x, y, paint);
}
}
private string TruncateText(SKPaint paint, string text, float maxWidth)
{
const string ellipsis = "...";
var ellipsisWidth = paint.MeasureText(ellipsis);
if (paint.MeasureText(text) <= maxWidth)
return text;
var availableWidth = maxWidth - ellipsisWidth;
if (availableWidth <= 0)
return ellipsis;
// Binary search for the right length
int low = 0;
int high = text.Length;
while (low < high)
{
int mid = (low + high + 1) / 2;
var substring = text.Substring(0, mid);
if (paint.MeasureText(substring) <= availableWidth)
low = mid;
else
high = mid - 1;
}
return text.Substring(0, low) + ellipsis;
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
if (string.IsNullOrEmpty(Text))
{
return new SKSize(
Padding.Left + Padding.Right,
FontSize + Padding.Top + Padding.Bottom);
}
var fontStyle = new SKFontStyle(
IsBold ? SKFontStyleWeight.Bold : SKFontStyleWeight.Normal,
SKFontStyleWidth.Normal,
IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(FontFamily, fontStyle)
?? SKTypeface.Default;
using var font = new SKFont(typeface, FontSize);
using var paint = new SKPaint(font);
if (MaxLines == 1 || !Text.Contains('\n'))
{
var textBounds = new SKRect();
paint.MeasureText(Text, ref textBounds);
return new SKSize(
textBounds.Width + Padding.Left + Padding.Right,
textBounds.Height + Padding.Top + Padding.Bottom);
}
else
{
var lines = Text.Split('\n');
var maxLinesToMeasure = MaxLines > 0 ? Math.Min(MaxLines, lines.Length) : lines.Length;
float maxWidth = 0;
foreach (var line in lines.Take(maxLinesToMeasure))
{
maxWidth = Math.Max(maxWidth, paint.MeasureText(line));
}
var totalHeight = maxLinesToMeasure * FontSize * LineHeight;
return new SKSize(
maxWidth + Padding.Left + Padding.Right,
totalHeight + Padding.Top + Padding.Bottom);
}
}
}
/// <summary>
/// Text alignment options.
/// </summary>
public enum TextAlignment
{
Start,
Center,
End
}
/// <summary>
/// Line break mode options.
/// </summary>
public enum LineBreakMode
{
NoWrap,
WordWrap,
CharacterWrap,
HeadTruncation,
TailTruncation,
MiddleTruncation
}
/// <summary>
/// Horizontal text alignment for Skia label.
/// </summary>
public enum SkiaTextAlignment
{
Left,
Center,
Right
}
/// <summary>
/// Vertical text alignment for Skia label.
/// </summary>
public enum SkiaVerticalAlignment
{
Top,
Center,
Bottom
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Base class for layout containers that can arrange child views.
/// </summary>
public abstract class SkiaLayoutView : SkiaView
{
private readonly List<SkiaView> _children = new();
/// <summary>
/// Gets the children of this layout.
/// </summary>
public new IReadOnlyList<SkiaView> Children => _children;
/// <summary>
/// Spacing between children.
/// </summary>
public float Spacing { get; set; } = 0;
/// <summary>
/// Padding around the content.
/// </summary>
public SKRect Padding { get; set; } = new SKRect(0, 0, 0, 0);
/// <summary>
/// Gets or sets whether child views are clipped to the bounds.
/// </summary>
public bool ClipToBounds { get; set; } = false;
/// <summary>
/// Adds a child view.
/// </summary>
public virtual void AddChild(SkiaView child)
{
if (child.Parent != null)
{
throw new InvalidOperationException("View already has a parent");
}
_children.Add(child);
child.Parent = this;
InvalidateMeasure();
Invalidate();
}
/// <summary>
/// Removes a child view.
/// </summary>
public virtual void RemoveChild(SkiaView child)
{
if (_children.Remove(child))
{
child.Parent = null;
InvalidateMeasure();
Invalidate();
}
}
/// <summary>
/// Removes a child at the specified index.
/// </summary>
public virtual void RemoveChildAt(int index)
{
if (index >= 0 && index < _children.Count)
{
var child = _children[index];
_children.RemoveAt(index);
child.Parent = null;
InvalidateMeasure();
Invalidate();
}
}
/// <summary>
/// Inserts a child at the specified index.
/// </summary>
public virtual void InsertChild(int index, SkiaView child)
{
if (child.Parent != null)
{
throw new InvalidOperationException("View already has a parent");
}
_children.Insert(index, child);
child.Parent = this;
InvalidateMeasure();
Invalidate();
}
/// <summary>
/// Clears all children.
/// </summary>
public virtual void ClearChildren()
{
foreach (var child in _children)
{
child.Parent = null;
}
_children.Clear();
InvalidateMeasure();
Invalidate();
}
/// <summary>
/// Gets the content bounds (bounds minus padding).
/// </summary>
protected virtual SKRect GetContentBounds()
{
return GetContentBounds(Bounds);
}
/// <summary>
/// Gets the content bounds for a given bounds rectangle.
/// </summary>
protected SKRect GetContentBounds(SKRect bounds)
{
return new SKRect(
bounds.Left + Padding.Left,
bounds.Top + Padding.Top,
bounds.Right - Padding.Right,
bounds.Bottom - Padding.Bottom);
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw children in order
foreach (var child in _children)
{
if (child.IsVisible)
{
child.Draw(canvas);
}
}
}
public override SkiaView? HitTest(float x, float y)
{
if (!IsVisible || !Bounds.Contains(new SKPoint(x, y)))
return null;
// Hit test children in reverse order (top-most first)
for (int i = _children.Count - 1; i >= 0; i--)
{
var child = _children[i];
var hit = child.HitTest(x, y);
if (hit != null)
return hit;
}
return this;
}
}
/// <summary>
/// Stack layout that arranges children in a horizontal or vertical line.
/// </summary>
public class SkiaStackLayout : SkiaLayoutView
{
/// <summary>
/// Gets or sets the orientation of the stack.
/// </summary>
public StackOrientation Orientation { get; set; } = StackOrientation.Vertical;
protected override SKSize MeasureOverride(SKSize availableSize)
{
var contentWidth = availableSize.Width - Padding.Left - Padding.Right;
var contentHeight = availableSize.Height - Padding.Top - Padding.Bottom;
float totalWidth = 0;
float totalHeight = 0;
float maxWidth = 0;
float maxHeight = 0;
var childAvailable = new SKSize(contentWidth, contentHeight);
foreach (var child in Children)
{
if (!child.IsVisible) continue;
var childSize = child.Measure(childAvailable);
if (Orientation == StackOrientation.Vertical)
{
totalHeight += childSize.Height;
maxWidth = Math.Max(maxWidth, childSize.Width);
}
else
{
totalWidth += childSize.Width;
maxHeight = Math.Max(maxHeight, childSize.Height);
}
}
// Add spacing
var visibleCount = Children.Count(c => c.IsVisible);
var totalSpacing = Math.Max(0, visibleCount - 1) * Spacing;
if (Orientation == StackOrientation.Vertical)
{
totalHeight += totalSpacing;
return new SKSize(
maxWidth + Padding.Left + Padding.Right,
totalHeight + Padding.Top + Padding.Bottom);
}
else
{
totalWidth += totalSpacing;
return new SKSize(
totalWidth + Padding.Left + Padding.Right,
maxHeight + Padding.Top + Padding.Bottom);
}
}
protected override SKRect ArrangeOverride(SKRect bounds)
{
var content = GetContentBounds(bounds);
float offset = 0;
foreach (var child in Children)
{
if (!child.IsVisible) continue;
var childDesired = child.DesiredSize;
SKRect childBounds;
if (Orientation == StackOrientation.Vertical)
{
childBounds = new SKRect(
content.Left,
content.Top + offset,
content.Right,
content.Top + offset + childDesired.Height);
offset += childDesired.Height + Spacing;
}
else
{
childBounds = new SKRect(
content.Left + offset,
content.Top,
content.Left + offset + childDesired.Width,
content.Bottom);
offset += childDesired.Width + Spacing;
}
child.Arrange(childBounds);
}
return bounds;
}
}
/// <summary>
/// Stack orientation options.
/// </summary>
public enum StackOrientation
{
Vertical,
Horizontal
}
/// <summary>
/// Grid layout that arranges children in rows and columns.
/// </summary>
public class SkiaGrid : SkiaLayoutView
{
private readonly List<GridLength> _rowDefinitions = new();
private readonly List<GridLength> _columnDefinitions = new();
private readonly Dictionary<SkiaView, GridPosition> _childPositions = new();
private float[] _rowHeights = Array.Empty<float>();
private float[] _columnWidths = Array.Empty<float>();
/// <summary>
/// Gets the row definitions.
/// </summary>
public IList<GridLength> RowDefinitions => _rowDefinitions;
/// <summary>
/// Gets the column definitions.
/// </summary>
public IList<GridLength> ColumnDefinitions => _columnDefinitions;
/// <summary>
/// Spacing between rows.
/// </summary>
public float RowSpacing { get; set; } = 0;
/// <summary>
/// Spacing between columns.
/// </summary>
public float ColumnSpacing { get; set; } = 0;
/// <summary>
/// Adds a child at the specified grid position.
/// </summary>
public void AddChild(SkiaView child, int row, int column, int rowSpan = 1, int columnSpan = 1)
{
base.AddChild(child);
_childPositions[child] = new GridPosition(row, column, rowSpan, columnSpan);
}
public override void RemoveChild(SkiaView child)
{
base.RemoveChild(child);
_childPositions.Remove(child);
}
/// <summary>
/// Gets the grid position of a child.
/// </summary>
public GridPosition GetPosition(SkiaView child)
{
return _childPositions.TryGetValue(child, out var pos) ? pos : new GridPosition(0, 0, 1, 1);
}
/// <summary>
/// Sets the grid position of a child.
/// </summary>
public void SetPosition(SkiaView child, int row, int column, int rowSpan = 1, int columnSpan = 1)
{
_childPositions[child] = new GridPosition(row, column, rowSpan, columnSpan);
InvalidateMeasure();
Invalidate();
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
var contentWidth = availableSize.Width - Padding.Left - Padding.Right;
var contentHeight = availableSize.Height - Padding.Top - Padding.Bottom;
var rowCount = Math.Max(1, _rowDefinitions.Count);
var columnCount = Math.Max(1, _columnDefinitions.Count);
// Calculate column widths
_columnWidths = CalculateSizes(_columnDefinitions, contentWidth, ColumnSpacing, columnCount);
_rowHeights = CalculateSizes(_rowDefinitions, contentHeight, RowSpacing, rowCount);
// Measure children to adjust auto sizes
foreach (var child in Children)
{
if (!child.IsVisible) continue;
var pos = GetPosition(child);
var cellWidth = GetCellWidth(pos.Column, pos.ColumnSpan);
var cellHeight = GetCellHeight(pos.Row, pos.RowSpan);
child.Measure(new SKSize(cellWidth, cellHeight));
}
// Calculate total size
var totalWidth = _columnWidths.Sum() + Math.Max(0, columnCount - 1) * ColumnSpacing;
var totalHeight = _rowHeights.Sum() + Math.Max(0, rowCount - 1) * RowSpacing;
return new SKSize(
totalWidth + Padding.Left + Padding.Right,
totalHeight + Padding.Top + Padding.Bottom);
}
private float[] CalculateSizes(List<GridLength> definitions, float available, float spacing, int count)
{
if (count == 0) return new float[] { available };
var sizes = new float[count];
var totalSpacing = Math.Max(0, count - 1) * spacing;
var remainingSpace = available - totalSpacing;
// First pass: absolute and auto sizes
float starTotal = 0;
for (int i = 0; i < count; i++)
{
var def = i < definitions.Count ? definitions[i] : GridLength.Star;
if (def.IsAbsolute)
{
sizes[i] = def.Value;
remainingSpace -= def.Value;
}
else if (def.IsAuto)
{
sizes[i] = 0; // Will be calculated from children
}
else if (def.IsStar)
{
starTotal += def.Value;
}
}
// Second pass: star sizes
if (starTotal > 0 && remainingSpace > 0)
{
for (int i = 0; i < count; i++)
{
var def = i < definitions.Count ? definitions[i] : GridLength.Star;
if (def.IsStar)
{
sizes[i] = (def.Value / starTotal) * remainingSpace;
}
}
}
return sizes;
}
private float GetCellWidth(int column, int span)
{
float width = 0;
for (int i = column; i < Math.Min(column + span, _columnWidths.Length); i++)
{
width += _columnWidths[i];
if (i > column) width += ColumnSpacing;
}
return width;
}
private float GetCellHeight(int row, int span)
{
float height = 0;
for (int i = row; i < Math.Min(row + span, _rowHeights.Length); i++)
{
height += _rowHeights[i];
if (i > row) height += RowSpacing;
}
return height;
}
private float GetColumnOffset(int column)
{
float offset = 0;
for (int i = 0; i < Math.Min(column, _columnWidths.Length); i++)
{
offset += _columnWidths[i] + ColumnSpacing;
}
return offset;
}
private float GetRowOffset(int row)
{
float offset = 0;
for (int i = 0; i < Math.Min(row, _rowHeights.Length); i++)
{
offset += _rowHeights[i] + RowSpacing;
}
return offset;
}
protected override SKRect ArrangeOverride(SKRect bounds)
{
var content = GetContentBounds(bounds);
foreach (var child in Children)
{
if (!child.IsVisible) continue;
var pos = GetPosition(child);
var x = content.Left + GetColumnOffset(pos.Column);
var y = content.Top + GetRowOffset(pos.Row);
var width = GetCellWidth(pos.Column, pos.ColumnSpan);
var height = GetCellHeight(pos.Row, pos.RowSpan);
child.Arrange(new SKRect(x, y, x + width, y + height));
}
return bounds;
}
}
/// <summary>
/// Grid position information.
/// </summary>
public readonly struct GridPosition
{
public int Row { get; }
public int Column { get; }
public int RowSpan { get; }
public int ColumnSpan { get; }
public GridPosition(int row, int column, int rowSpan = 1, int columnSpan = 1)
{
Row = row;
Column = column;
RowSpan = Math.Max(1, rowSpan);
ColumnSpan = Math.Max(1, columnSpan);
}
}
/// <summary>
/// Grid length specification.
/// </summary>
public readonly struct GridLength
{
public float Value { get; }
public GridUnitType GridUnitType { get; }
public bool IsAbsolute => GridUnitType == GridUnitType.Absolute;
public bool IsAuto => GridUnitType == GridUnitType.Auto;
public bool IsStar => GridUnitType == GridUnitType.Star;
public static GridLength Auto => new(1, GridUnitType.Auto);
public static GridLength Star => new(1, GridUnitType.Star);
public GridLength(float value, GridUnitType unitType = GridUnitType.Absolute)
{
Value = value;
GridUnitType = unitType;
}
public static GridLength FromAbsolute(float value) => new(value, GridUnitType.Absolute);
public static GridLength FromStar(float value = 1) => new(value, GridUnitType.Star);
}
/// <summary>
/// Grid unit type options.
/// </summary>
public enum GridUnitType
{
Absolute,
Star,
Auto
}
/// <summary>
/// Absolute layout that positions children at exact coordinates.
/// </summary>
public class SkiaAbsoluteLayout : SkiaLayoutView
{
private readonly Dictionary<SkiaView, AbsoluteLayoutBounds> _childBounds = new();
/// <summary>
/// Adds a child at the specified position and size.
/// </summary>
public void AddChild(SkiaView child, SKRect bounds, AbsoluteLayoutFlags flags = AbsoluteLayoutFlags.None)
{
base.AddChild(child);
_childBounds[child] = new AbsoluteLayoutBounds(bounds, flags);
}
public override void RemoveChild(SkiaView child)
{
base.RemoveChild(child);
_childBounds.Remove(child);
}
/// <summary>
/// Gets the layout bounds for a child.
/// </summary>
public AbsoluteLayoutBounds GetLayoutBounds(SkiaView child)
{
return _childBounds.TryGetValue(child, out var bounds)
? bounds
: new AbsoluteLayoutBounds(SKRect.Empty, AbsoluteLayoutFlags.None);
}
/// <summary>
/// Sets the layout bounds for a child.
/// </summary>
public void SetLayoutBounds(SkiaView child, SKRect bounds, AbsoluteLayoutFlags flags = AbsoluteLayoutFlags.None)
{
_childBounds[child] = new AbsoluteLayoutBounds(bounds, flags);
InvalidateMeasure();
Invalidate();
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
float maxRight = 0;
float maxBottom = 0;
foreach (var child in Children)
{
if (!child.IsVisible) continue;
var layout = GetLayoutBounds(child);
var bounds = layout.Bounds;
child.Measure(new SKSize(bounds.Width, bounds.Height));
maxRight = Math.Max(maxRight, bounds.Right);
maxBottom = Math.Max(maxBottom, bounds.Bottom);
}
return new SKSize(
maxRight + Padding.Left + Padding.Right,
maxBottom + Padding.Top + Padding.Bottom);
}
protected override SKRect ArrangeOverride(SKRect bounds)
{
var content = GetContentBounds(bounds);
foreach (var child in Children)
{
if (!child.IsVisible) continue;
var layout = GetLayoutBounds(child);
var childBounds = layout.Bounds;
var flags = layout.Flags;
float x, y, width, height;
// X position
if (flags.HasFlag(AbsoluteLayoutFlags.XProportional))
x = content.Left + childBounds.Left * content.Width;
else
x = content.Left + childBounds.Left;
// Y position
if (flags.HasFlag(AbsoluteLayoutFlags.YProportional))
y = content.Top + childBounds.Top * content.Height;
else
y = content.Top + childBounds.Top;
// Width
if (flags.HasFlag(AbsoluteLayoutFlags.WidthProportional))
width = childBounds.Width * content.Width;
else if (childBounds.Width < 0)
width = child.DesiredSize.Width;
else
width = childBounds.Width;
// Height
if (flags.HasFlag(AbsoluteLayoutFlags.HeightProportional))
height = childBounds.Height * content.Height;
else if (childBounds.Height < 0)
height = child.DesiredSize.Height;
else
height = childBounds.Height;
child.Arrange(new SKRect(x, y, x + width, y + height));
}
return bounds;
}
}
/// <summary>
/// Absolute layout bounds for a child.
/// </summary>
public readonly struct AbsoluteLayoutBounds
{
public SKRect Bounds { get; }
public AbsoluteLayoutFlags Flags { get; }
public AbsoluteLayoutBounds(SKRect bounds, AbsoluteLayoutFlags flags)
{
Bounds = bounds;
Flags = flags;
}
}
/// <summary>
/// Flags for absolute layout positioning.
/// </summary>
[Flags]
public enum AbsoluteLayoutFlags
{
None = 0,
XProportional = 1,
YProportional = 2,
WidthProportional = 4,
HeightProportional = 8,
PositionProportional = XProportional | YProportional,
SizeProportional = WidthProportional | HeightProportional,
All = XProportional | YProportional | WidthProportional | HeightProportional
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
namespace Microsoft.Maui.Platform;
/// <summary>
/// A horizontal menu bar control.
/// </summary>
public class SkiaMenuBar : SkiaView
{
private readonly List<MenuBarItem> _items = new();
private int _hoveredIndex = -1;
private int _openIndex = -1;
private SkiaMenuFlyout? _openFlyout;
/// <summary>
/// Gets the menu bar items.
/// </summary>
public IList<MenuBarItem> Items => _items;
/// <summary>
/// Gets or sets the background color.
/// </summary>
public SKColor BackgroundColor { get; set; } = new SKColor(240, 240, 240);
/// <summary>
/// Gets or sets the text color.
/// </summary>
public SKColor TextColor { get; set; } = new SKColor(33, 33, 33);
/// <summary>
/// Gets or sets the hover background color.
/// </summary>
public SKColor HoverBackgroundColor { get; set; } = new SKColor(220, 220, 220);
/// <summary>
/// Gets or sets the active background color.
/// </summary>
public SKColor ActiveBackgroundColor { get; set; } = new SKColor(200, 200, 200);
/// <summary>
/// Gets or sets the bar height.
/// </summary>
public float BarHeight { get; set; } = 28f;
/// <summary>
/// Gets or sets the font size.
/// </summary>
public float FontSize { get; set; } = 13f;
/// <summary>
/// Gets or sets the item padding.
/// </summary>
public float ItemPadding { get; set; } = 12f;
protected override SKSize MeasureOverride(SKSize availableSize)
{
return new SKSize(availableSize.Width, BarHeight);
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
canvas.Save();
// Draw background
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(Bounds, bgPaint);
// Draw bottom border
using var borderPaint = new SKPaint
{
Color = new SKColor(200, 200, 200),
Style = SKPaintStyle.Stroke,
StrokeWidth = 1
};
canvas.DrawLine(Bounds.Left, Bounds.Bottom, Bounds.Right, Bounds.Bottom, borderPaint);
// Draw menu items
using var textPaint = new SKPaint
{
Color = TextColor,
TextSize = FontSize,
IsAntialias = true
};
float x = Bounds.Left;
for (int i = 0; i < _items.Count; i++)
{
var item = _items[i];
var textBounds = new SKRect();
textPaint.MeasureText(item.Text, ref textBounds);
float itemWidth = textBounds.Width + ItemPadding * 2;
var itemBounds = new SKRect(x, Bounds.Top, x + itemWidth, Bounds.Bottom);
// Draw item background
if (i == _openIndex)
{
using var activePaint = new SKPaint { Color = ActiveBackgroundColor, Style = SKPaintStyle.Fill };
canvas.DrawRect(itemBounds, activePaint);
}
else if (i == _hoveredIndex)
{
using var hoverPaint = new SKPaint { Color = HoverBackgroundColor, Style = SKPaintStyle.Fill };
canvas.DrawRect(itemBounds, hoverPaint);
}
// Draw text
float textX = x + ItemPadding;
float textY = Bounds.MidY - textBounds.MidY;
canvas.DrawText(item.Text, textX, textY, textPaint);
item.Bounds = itemBounds;
x += itemWidth;
}
// Draw open flyout
_openFlyout?.Draw(canvas);
canvas.Restore();
}
public override SkiaView? HitTest(float x, float y)
{
if (!IsVisible) return null;
// Check flyout first
if (_openFlyout != null)
{
var flyoutHit = _openFlyout.HitTest(x, y);
if (flyoutHit != null) return flyoutHit;
}
if (Bounds.Contains(x, y))
{
return this;
}
// Close flyout if clicking outside
if (_openFlyout != null)
{
CloseFlyout();
}
return null;
}
public override void OnPointerMoved(PointerEventArgs e)
{
if (!IsEnabled) return;
int newHovered = -1;
for (int i = 0; i < _items.Count; i++)
{
if (_items[i].Bounds.Contains(e.X, e.Y))
{
newHovered = i;
break;
}
}
if (newHovered != _hoveredIndex)
{
_hoveredIndex = newHovered;
// If a menu is open and we hover another item, open that one
if (_openIndex >= 0 && newHovered >= 0 && newHovered != _openIndex)
{
OpenFlyout(newHovered);
}
Invalidate();
}
base.OnPointerMoved(e);
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (!IsEnabled) return;
// Check if clicking on flyout
if (_openFlyout != null)
{
_openFlyout.OnPointerPressed(e);
if (e.Handled)
{
CloseFlyout();
return;
}
}
// Check menu bar items
for (int i = 0; i < _items.Count; i++)
{
if (_items[i].Bounds.Contains(e.X, e.Y))
{
if (_openIndex == i)
{
CloseFlyout();
}
else
{
OpenFlyout(i);
}
e.Handled = true;
return;
}
}
// Click outside - close flyout
if (_openFlyout != null)
{
CloseFlyout();
e.Handled = true;
}
base.OnPointerPressed(e);
}
private void OpenFlyout(int index)
{
if (index < 0 || index >= _items.Count) return;
var item = _items[index];
_openIndex = index;
_openFlyout = new SkiaMenuFlyout
{
Items = item.Items
};
// Position below the menu item
float x = item.Bounds.Left;
float y = item.Bounds.Bottom;
_openFlyout.Position = new SKPoint(x, y);
_openFlyout.ItemClicked += OnFlyoutItemClicked;
Invalidate();
}
private void CloseFlyout()
{
if (_openFlyout != null)
{
_openFlyout.ItemClicked -= OnFlyoutItemClicked;
_openFlyout = null;
}
_openIndex = -1;
Invalidate();
}
private void OnFlyoutItemClicked(object? sender, MenuItemClickedEventArgs e)
{
CloseFlyout();
}
}
/// <summary>
/// Represents a top-level menu bar item.
/// </summary>
public class MenuBarItem
{
/// <summary>
/// Gets or sets the display text.
/// </summary>
public string Text { get; set; } = string.Empty;
/// <summary>
/// Gets the menu items.
/// </summary>
public List<MenuItem> Items { get; } = new();
/// <summary>
/// Gets or sets the bounds (set during rendering).
/// </summary>
internal SKRect Bounds { get; set; }
}
/// <summary>
/// Represents a menu item.
/// </summary>
public class MenuItem
{
/// <summary>
/// Gets or sets the display text.
/// </summary>
public string Text { get; set; } = string.Empty;
/// <summary>
/// Gets or sets the keyboard shortcut text.
/// </summary>
public string? Shortcut { get; set; }
/// <summary>
/// Gets or sets whether this is a separator.
/// </summary>
public bool IsSeparator { get; set; }
/// <summary>
/// Gets or sets whether this item is enabled.
/// </summary>
public bool IsEnabled { get; set; } = true;
/// <summary>
/// Gets or sets whether this item is checked.
/// </summary>
public bool IsChecked { get; set; }
/// <summary>
/// Gets or sets the icon source.
/// </summary>
public string? IconSource { get; set; }
/// <summary>
/// Gets the sub-menu items.
/// </summary>
public List<MenuItem> SubItems { get; } = new();
/// <summary>
/// Event raised when the item is clicked.
/// </summary>
public event EventHandler? Clicked;
internal void OnClicked()
{
Clicked?.Invoke(this, EventArgs.Empty);
}
}
/// <summary>
/// A dropdown menu flyout.
/// </summary>
public class SkiaMenuFlyout : SkiaView
{
private int _hoveredIndex = -1;
private SKRect _bounds;
/// <summary>
/// Gets or sets the menu items.
/// </summary>
public List<MenuItem> Items { get; set; } = new();
/// <summary>
/// Gets or sets the position.
/// </summary>
public SKPoint Position { get; set; }
/// <summary>
/// Gets or sets the background color.
/// </summary>
public SKColor BackgroundColor { get; set; } = SKColors.White;
/// <summary>
/// Gets or sets the text color.
/// </summary>
public SKColor TextColor { get; set; } = new SKColor(33, 33, 33);
/// <summary>
/// Gets or sets the disabled text color.
/// </summary>
public SKColor DisabledTextColor { get; set; } = new SKColor(160, 160, 160);
/// <summary>
/// Gets or sets the hover background color.
/// </summary>
public SKColor HoverBackgroundColor { get; set; } = new SKColor(230, 230, 230);
/// <summary>
/// Gets or sets the separator color.
/// </summary>
public SKColor SeparatorColor { get; set; } = new SKColor(220, 220, 220);
/// <summary>
/// Gets or sets the font size.
/// </summary>
public float FontSize { get; set; } = 13f;
/// <summary>
/// Gets or sets the item height.
/// </summary>
public float ItemHeight { get; set; } = 28f;
/// <summary>
/// Gets or sets the separator height.
/// </summary>
public float SeparatorHeight { get; set; } = 9f;
/// <summary>
/// Gets or sets the minimum width.
/// </summary>
public float MinWidth { get; set; } = 180f;
/// <summary>
/// Event raised when an item is clicked.
/// </summary>
public event EventHandler<MenuItemClickedEventArgs>? ItemClicked;
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
if (Items.Count == 0) return;
// Calculate bounds
float width = MinWidth;
float height = 0;
using var textPaint = new SKPaint
{
TextSize = FontSize,
IsAntialias = true
};
foreach (var item in Items)
{
if (item.IsSeparator)
{
height += SeparatorHeight;
}
else
{
height += ItemHeight;
var textBounds = new SKRect();
textPaint.MeasureText(item.Text, ref textBounds);
float itemWidth = textBounds.Width + 50; // Padding + icon space
if (!string.IsNullOrEmpty(item.Shortcut))
{
textPaint.MeasureText(item.Shortcut, ref textBounds);
itemWidth += textBounds.Width + 20;
}
width = Math.Max(width, itemWidth);
}
}
_bounds = new SKRect(Position.X, Position.Y, Position.X + width, Position.Y + height);
// Draw shadow
using var shadowPaint = new SKPaint
{
ImageFilter = SKImageFilter.CreateDropShadow(0, 2, 8, 8, new SKColor(0, 0, 0, 40))
};
canvas.DrawRect(_bounds, shadowPaint);
// Draw background
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(_bounds, bgPaint);
// Draw border
using var borderPaint = new SKPaint
{
Color = new SKColor(200, 200, 200),
Style = SKPaintStyle.Stroke,
StrokeWidth = 1
};
canvas.DrawRect(_bounds, borderPaint);
// Draw items
float y = _bounds.Top;
textPaint.Color = TextColor;
for (int i = 0; i < Items.Count; i++)
{
var item = Items[i];
if (item.IsSeparator)
{
float separatorY = y + SeparatorHeight / 2;
using var sepPaint = new SKPaint { Color = SeparatorColor, StrokeWidth = 1 };
canvas.DrawLine(_bounds.Left + 8, separatorY, _bounds.Right - 8, separatorY, sepPaint);
y += SeparatorHeight;
}
else
{
var itemBounds = new SKRect(_bounds.Left, y, _bounds.Right, y + ItemHeight);
// Draw hover background
if (i == _hoveredIndex && item.IsEnabled)
{
using var hoverPaint = new SKPaint { Color = HoverBackgroundColor, Style = SKPaintStyle.Fill };
canvas.DrawRect(itemBounds, hoverPaint);
}
// Draw check mark
if (item.IsChecked)
{
using var checkPaint = new SKPaint
{
Color = item.IsEnabled ? TextColor : DisabledTextColor,
TextSize = FontSize,
IsAntialias = true
};
canvas.DrawText("✓", _bounds.Left + 8, y + ItemHeight / 2 + 5, checkPaint);
}
// Draw text
textPaint.Color = item.IsEnabled ? TextColor : DisabledTextColor;
canvas.DrawText(item.Text, _bounds.Left + 28, y + ItemHeight / 2 + 5, textPaint);
// Draw shortcut
if (!string.IsNullOrEmpty(item.Shortcut))
{
textPaint.Color = DisabledTextColor;
var shortcutBounds = new SKRect();
textPaint.MeasureText(item.Shortcut, ref shortcutBounds);
canvas.DrawText(item.Shortcut, _bounds.Right - shortcutBounds.Width - 12, y + ItemHeight / 2 + 5, textPaint);
}
// Draw submenu arrow
if (item.SubItems.Count > 0)
{
canvas.DrawText("▸", _bounds.Right - 16, y + ItemHeight / 2 + 5, textPaint);
}
y += ItemHeight;
}
}
}
public override SkiaView? HitTest(float x, float y)
{
if (_bounds.Contains(x, y))
{
return this;
}
return null;
}
public override void OnPointerMoved(PointerEventArgs e)
{
if (!_bounds.Contains(e.X, e.Y))
{
_hoveredIndex = -1;
Invalidate();
return;
}
float y = _bounds.Top;
int newHovered = -1;
for (int i = 0; i < Items.Count; i++)
{
var item = Items[i];
float itemHeight = item.IsSeparator ? SeparatorHeight : ItemHeight;
if (e.Y >= y && e.Y < y + itemHeight && !item.IsSeparator)
{
newHovered = i;
break;
}
y += itemHeight;
}
if (newHovered != _hoveredIndex)
{
_hoveredIndex = newHovered;
Invalidate();
}
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (_hoveredIndex >= 0 && _hoveredIndex < Items.Count)
{
var item = Items[_hoveredIndex];
if (item.IsEnabled && !item.IsSeparator)
{
item.OnClicked();
ItemClicked?.Invoke(this, new MenuItemClickedEventArgs(item));
e.Handled = true;
}
}
}
}
/// <summary>
/// Event args for menu item clicked.
/// </summary>
public class MenuItemClickedEventArgs : EventArgs
{
public MenuItem Item { get; }
public MenuItemClickedEventArgs(MenuItem item)
{
Item = item;
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using SkiaSharp;
using Microsoft.Maui.Graphics;
namespace Microsoft.Maui.Platform;
/// <summary>
/// Skia-rendered navigation page with back stack support.
/// </summary>
public class SkiaNavigationPage : SkiaView
{
private readonly Stack<SkiaPage> _navigationStack = new();
private SkiaPage? _currentPage;
private bool _isAnimating;
private float _animationProgress;
private SkiaPage? _incomingPage;
private bool _isPushAnimation;
// Navigation bar styling
private SKColor _barBackgroundColor = new SKColor(0x21, 0x96, 0xF3);
private SKColor _barTextColor = SKColors.White;
private float _navigationBarHeight = 56;
private bool _showBackButton = true;
public SKColor BarBackgroundColor
{
get => _barBackgroundColor;
set
{
_barBackgroundColor = value;
UpdatePageNavigationBar();
Invalidate();
}
}
public SKColor BarTextColor
{
get => _barTextColor;
set
{
_barTextColor = value;
UpdatePageNavigationBar();
Invalidate();
}
}
public float NavigationBarHeight
{
get => _navigationBarHeight;
set
{
_navigationBarHeight = value;
UpdatePageNavigationBar();
Invalidate();
}
}
public SkiaPage? CurrentPage => _currentPage;
public SkiaPage? RootPage => _navigationStack.Count > 0 ? _navigationStack.Last() : _currentPage;
public int StackDepth => _navigationStack.Count + (_currentPage != null ? 1 : 0);
public event EventHandler<NavigationEventArgs>? Pushed;
public event EventHandler<NavigationEventArgs>? Popped;
public event EventHandler<NavigationEventArgs>? PoppedToRoot;
public SkiaNavigationPage()
{
}
public SkiaNavigationPage(SkiaPage rootPage)
{
SetRootPage(rootPage);
}
public void SetRootPage(SkiaPage page)
{
_navigationStack.Clear();
_currentPage?.OnDisappearing();
_currentPage = page;
_currentPage.Parent = this;
ConfigurePage(_currentPage, false);
_currentPage.OnAppearing();
Invalidate();
}
public void Push(SkiaPage page, bool animated = true)
{
if (_isAnimating) return;
if (_currentPage != null)
{
_currentPage.OnDisappearing();
_navigationStack.Push(_currentPage);
}
ConfigurePage(page, true);
page.Parent = this;
if (animated)
{
_incomingPage = page;
_isPushAnimation = true;
_animationProgress = 0;
_isAnimating = true;
AnimatePush();
}
else
{
_currentPage = page;
_currentPage.OnAppearing();
Invalidate();
}
Pushed?.Invoke(this, new NavigationEventArgs(page));
}
public SkiaPage? Pop(bool animated = true)
{
if (_isAnimating || _navigationStack.Count == 0) return null;
var poppedPage = _currentPage;
poppedPage?.OnDisappearing();
var previousPage = _navigationStack.Pop();
if (animated && poppedPage != null)
{
_incomingPage = previousPage;
_isPushAnimation = false;
_animationProgress = 0;
_isAnimating = true;
AnimatePop(poppedPage);
}
else
{
_currentPage = previousPage;
_currentPage?.OnAppearing();
Invalidate();
}
if (poppedPage != null)
{
Popped?.Invoke(this, new NavigationEventArgs(poppedPage));
}
return poppedPage;
}
public void PopToRoot(bool animated = true)
{
if (_isAnimating || _navigationStack.Count == 0) return;
_currentPage?.OnDisappearing();
// Get root page
SkiaPage? rootPage = null;
while (_navigationStack.Count > 0)
{
rootPage = _navigationStack.Pop();
}
if (rootPage != null)
{
_currentPage = rootPage;
ConfigurePage(_currentPage, false);
_currentPage.OnAppearing();
Invalidate();
}
PoppedToRoot?.Invoke(this, new NavigationEventArgs(_currentPage!));
}
private void ConfigurePage(SkiaPage page, bool showBackButton)
{
page.ShowNavigationBar = true;
page.TitleBarColor = _barBackgroundColor;
page.TitleTextColor = _barTextColor;
page.NavigationBarHeight = _navigationBarHeight;
_showBackButton = showBackButton && _navigationStack.Count > 0;
}
private void UpdatePageNavigationBar()
{
if (_currentPage != null)
{
_currentPage.TitleBarColor = _barBackgroundColor;
_currentPage.TitleTextColor = _barTextColor;
_currentPage.NavigationBarHeight = _navigationBarHeight;
}
}
private async void AnimatePush()
{
const int durationMs = 250;
const int frameMs = 16;
var startTime = DateTime.Now;
while (_animationProgress < 1)
{
await Task.Delay(frameMs);
var elapsed = (DateTime.Now - startTime).TotalMilliseconds;
_animationProgress = Math.Min(1, (float)(elapsed / durationMs));
Invalidate();
}
_currentPage = _incomingPage;
_incomingPage = null;
_isAnimating = false;
_currentPage?.OnAppearing();
Invalidate();
}
private async void AnimatePop(SkiaPage outgoingPage)
{
const int durationMs = 250;
const int frameMs = 16;
var startTime = DateTime.Now;
while (_animationProgress < 1)
{
await Task.Delay(frameMs);
var elapsed = (DateTime.Now - startTime).TotalMilliseconds;
_animationProgress = Math.Min(1, (float)(elapsed / durationMs));
Invalidate();
}
_currentPage = _incomingPage;
_incomingPage = null;
_isAnimating = false;
_currentPage?.OnAppearing();
outgoingPage.Parent = null;
Invalidate();
}
protected override void OnDraw(SKCanvas canvas, SKRect bounds)
{
// Draw background
if (BackgroundColor != SKColors.Transparent)
{
using var bgPaint = new SKPaint
{
Color = BackgroundColor,
Style = SKPaintStyle.Fill
};
canvas.DrawRect(bounds, bgPaint);
}
if (_isAnimating && _incomingPage != null)
{
// Draw animation
var eased = EaseOutCubic(_animationProgress);
if (_isPushAnimation)
{
// Push: current page slides left, incoming slides from right
var currentOffset = -bounds.Width * eased;
var incomingOffset = bounds.Width * (1 - eased);
// Draw current page (sliding out)
if (_currentPage != null)
{
canvas.Save();
canvas.Translate(currentOffset, 0);
_currentPage.Bounds = bounds;
_currentPage.Draw(canvas);
canvas.Restore();
}
// Draw incoming page
canvas.Save();
canvas.Translate(incomingOffset, 0);
_incomingPage.Bounds = bounds;
_incomingPage.Draw(canvas);
canvas.Restore();
}
else
{
// Pop: incoming slides from left, current slides right
var incomingOffset = -bounds.Width * (1 - eased);
var currentOffset = bounds.Width * eased;
// Draw incoming page (sliding in)
canvas.Save();
canvas.Translate(incomingOffset, 0);
_incomingPage.Bounds = bounds;
_incomingPage.Draw(canvas);
canvas.Restore();
// Draw current page (sliding out)
if (_currentPage != null)
{
canvas.Save();
canvas.Translate(currentOffset, 0);
_currentPage.Bounds = bounds;
_currentPage.Draw(canvas);
canvas.Restore();
}
}
}
else if (_currentPage != null)
{
// Draw current page normally
_currentPage.Bounds = bounds;
_currentPage.Draw(canvas);
// Draw back button if applicable
if (_showBackButton && _navigationStack.Count > 0)
{
DrawBackButton(canvas, bounds);
}
}
}
private void DrawBackButton(SKCanvas canvas, SKRect bounds)
{
var buttonBounds = new SKRect(bounds.Left + 8, bounds.Top + 12, bounds.Left + 48, bounds.Top + _navigationBarHeight - 12);
using var paint = new SKPaint
{
Color = _barTextColor,
Style = SKPaintStyle.Stroke,
StrokeWidth = 2.5f,
IsAntialias = true,
StrokeCap = SKStrokeCap.Round
};
// Draw back arrow
var centerY = buttonBounds.MidY;
var arrowSize = 10f;
var left = buttonBounds.Left + 8;
using var path = new SKPath();
path.MoveTo(left + arrowSize, centerY - arrowSize);
path.LineTo(left, centerY);
path.LineTo(left + arrowSize, centerY + arrowSize);
canvas.DrawPath(path, paint);
}
private static float EaseOutCubic(float t)
{
return 1 - (float)Math.Pow(1 - t, 3);
}
protected override SKSize MeasureOverride(SKSize availableSize)
{
return availableSize;
}
public override void OnPointerPressed(PointerEventArgs e)
{
if (_isAnimating) return;
// Check for back button click
if (_showBackButton && _navigationStack.Count > 0)
{
if (e.X < 56 && e.Y < _navigationBarHeight)
{
Pop();
return;
}
}
_currentPage?.OnPointerPressed(e);
}
public override void OnPointerMoved(PointerEventArgs e)
{
if (_isAnimating) return;
_currentPage?.OnPointerMoved(e);
}
public override void OnPointerReleased(PointerEventArgs e)
{
if (_isAnimating) return;
_currentPage?.OnPointerReleased(e);
}
public override void OnKeyDown(KeyEventArgs e)
{
if (_isAnimating) return;
// Handle back navigation with Escape or Backspace
if ((e.Key == Key.Escape || e.Key == Key.Backspace) && _navigationStack.Count > 0)
{
Pop();
e.Handled = true;
return;
}
_currentPage?.OnKeyDown(e);
}
public override void OnKeyUp(KeyEventArgs e)
{
if (_isAnimating) return;
_currentPage?.OnKeyUp(e);
}
public override void OnScroll(ScrollEventArgs e)
{
if (_isAnimating) return;
_currentPage?.OnScroll(e);
}
}
/// <summary>
/// Event args for navigation events.
/// </summary>
public class NavigationEventArgs : EventArgs
{
public SkiaPage Page { get; }
public NavigationEventArgs(SkiaPage page)
{
Page = page;
}
}

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