feat: update window decoration styles to use transparent backgrounds.

* feat: integrate font management by adding Semi.Avalonia.Demo.Fonts project.

* chore: test on ubuntu.

* feat: add linux options.

* feat: update theme settings and adjust window decorations.

* feat: add font to DRM project.

* misc: net8.0->net10.0

Semi.Avalonia.slnx

@@ -3,6 +3,7 @@
         <Project Path="demo/Semi.Avalonia.Demo.Android/Semi.Avalonia.Demo.Android.csproj"/>
         <Project Path="demo/Semi.Avalonia.Demo.Desktop/Semi.Avalonia.Demo.Desktop.csproj"/>
         <Project Path="demo/Semi.Avalonia.Demo.Drm/Semi.Avalonia.Demo.Drm.csproj"/>
+        <Project Path="demo/Semi.Avalonia.Demo.Fonts/Semi.Avalonia.Demo.Fonts.csproj"/>
         <Project Path="demo/Semi.Avalonia.Demo.Web/Semi.Avalonia.Demo.Web.csproj"/>
         <Project Path="demo/Semi.Avalonia.Demo/Semi.Avalonia.Demo.csproj"/>
     </Folder>

demo/Semi.Avalonia.Demo.Android/Application.cs

@@ -2,6 +2,7 @@
 using Android.Runtime;
 using Avalonia;
 using Avalonia.Android;
+using Semi.Avalonia.Demo.Fonts;
 
 namespace Semi.Avalonia.Demo.Android;
 

demo/Semi.Avalonia.Demo.Android/AvaloniaAppBuilderExtensions.cs

@@ -1,16 +0,0 @@
-using Avalonia;
-using Avalonia.Media;
-
-namespace Semi.Avalonia.Demo.Android;
-
-public static class AvaloniaAppBuilderExtensions
-{
-    private static string DefaultFontFamily => "avares://Semi.Avalonia.Demo.Android/Assets#Source Han Sans CN";
-
-    public static AppBuilder WithSourceHanSansCNFont(this AppBuilder builder) =>
-        builder.With(new FontManagerOptions
-        {
-            DefaultFamilyName = DefaultFontFamily,
-            FontFallbacks = [new FontFallback { FontFamily = new FontFamily(DefaultFontFamily) }]
-        });
-}

demo/Semi.Avalonia.Demo.Android/Semi.Avalonia.Demo.Android.csproj

@@ -21,7 +21,6 @@
 
     <ItemGroup>
         <AndroidResource Include="Icon.png" Link="Resources\drawable\Icon.png"/>
-        <AvaloniaResource Include="..\Fonts\*" Link="Assets\Fonts\%(Filename)%(Extension)" />
     </ItemGroup>
 
     <ItemGroup>
@@ -31,5 +30,6 @@
 
     <ItemGroup>
         <ProjectReference Include="..\Semi.Avalonia.Demo\Semi.Avalonia.Demo.csproj"/>
+        <ProjectReference Include="..\Semi.Avalonia.Demo.Fonts\Semi.Avalonia.Demo.Fonts.csproj"/>
     </ItemGroup>
 </Project>

demo/Semi.Avalonia.Demo.Desktop/Program.cs

@@ -2,8 +2,10 @@
 using Avalonia;
 using Avalonia.Dialogs;
 using Avalonia.Media;
+using Semi.Avalonia.Demo.Fonts;
 
 namespace Semi.Avalonia.Demo.Desktop;
+#pragma warning disable CA1416, AVALONIA_X11_CSD, AVALONIA_X11_FORCE_CSD
 
 sealed class Program
 {
@@ -11,24 +13,28 @@ sealed class Program
     // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
     // yet and stuff might break.
     [STAThread]
-    public static void Main(string[] args) => BuildAvaloniaApp()
-        .With(new FontManagerOptions
+    public static void Main(string[] args)
     {
-            FontFallbacks =
-            [
-                new FontFallback
+        var appBuilder = BuildAvaloniaApp();
+        if (!OperatingSystem.IsLinux())
+            appBuilder.With(new FontManagerOptions
             {
-                    FontFamily = new FontFamily("Microsoft YaHei")
+                FontFallbacks = [new FontFallback { FontFamily = new FontFamily("Microsoft YaHei") }]
+            });
+
+        appBuilder.StartWithClassicDesktopLifetime(args);
     }
-            ]
-        })
-        .StartWithClassicDesktopLifetime(args);
 
     // Avalonia configuration, don't remove; also used by visual designer.
     public static AppBuilder BuildAvaloniaApp()
-        => AppBuilder.Configure<App>()
+    {
+        var appBuilder = AppBuilder.Configure<App>()
             .UseManagedSystemDialogs()
             .UsePlatformDetect()
             .With(new Win32PlatformOptions())
+            .With(new X11PlatformOptions { EnableDrawnDecorations = true })
             .LogToTrace();
+        if (OperatingSystem.IsLinux()) appBuilder.WithSourceHanSansCNFont();
+        return appBuilder;
+    }
 }

demo/Semi.Avalonia.Demo.Desktop/Semi.Avalonia.Demo.Desktop.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>WinExe</OutputType>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <Nullable>enable</Nullable>
         <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
         <ApplicationIcon>..\Semi.Avalonia.Demo\Assets\irihi.ico</ApplicationIcon>
@@ -28,5 +28,6 @@
 
     <ItemGroup>
         <ProjectReference Include="..\Semi.Avalonia.Demo\Semi.Avalonia.Demo.csproj"/>
+        <ProjectReference Include="..\Semi.Avalonia.Demo.Fonts\Semi.Avalonia.Demo.Fonts.csproj"/>
     </ItemGroup>
 </Project>

demo/Semi.Avalonia.Demo.Drm/Program.cs

@@ -4,8 +4,10 @@ using System.Linq;
 using System.Threading;
 using Avalonia;
 using Avalonia.Dialogs;
+using Semi.Avalonia.Demo.Fonts;
 
 namespace Semi.Avalonia.Demo.Drm;
+#pragma warning disable CA1416, AVALONIA_X11_CSD, AVALONIA_X11_FORCE_CSD
 
 sealed class Program
 {
@@ -40,7 +42,8 @@ sealed class Program
         => AppBuilder.Configure<App>()
             .UseManagedSystemDialogs()
             .UsePlatformDetect()
-            .With(new Win32PlatformOptions())
+            .With(new X11PlatformOptions { EnableDrawnDecorations = true })
+            .WithSourceHanSansCNFont()
             .LogToTrace();
 
     private static void SilenceConsole()
@@ -50,7 +53,6 @@ sealed class Program
             Console.CursorVisible = false;
             while (true)
                 Console.ReadKey(true);
-            })
-            { IsBackground = true }.Start();
+        }) { IsBackground = true }.Start();
     }
 }

demo/Semi.Avalonia.Demo.Drm/Semi.Avalonia.Demo.Drm.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>WinExe</OutputType>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <Nullable>enable</Nullable>
         <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
         <ApplicationIcon>..\Semi.Avalonia.Demo\Assets\irihi.ico</ApplicationIcon>
@@ -29,5 +29,6 @@
 
     <ItemGroup>
         <ProjectReference Include="..\Semi.Avalonia.Demo\Semi.Avalonia.Demo.csproj"/>
+        <ProjectReference Include="..\Semi.Avalonia.Demo.Fonts\Semi.Avalonia.Demo.Fonts.csproj"/>
     </ItemGroup>
 </Project>

demo/Semi.Avalonia.Demo.Fonts/AvaloniaAppBuilderExtensions.cs

@@ -0,0 +1,16 @@
+using Avalonia;
+using Avalonia.Media;
+
+namespace Semi.Avalonia.Demo.Fonts;
+
+public static class AvaloniaAppBuilderExtensions
+{
+    public static AppBuilder WithSourceHanSansCNFont(this AppBuilder builder)
+    {
+        const string uri = "avares://Semi.Avalonia.Demo.Fonts/Assets#Source Han Sans CN";
+        return builder.With(new FontManagerOptions
+        {
+            DefaultFamilyName = uri, FontFallbacks = [new FontFallback { FontFamily = new FontFamily(uri) }]
+        });
+    }
+}

demo/Semi.Avalonia.Demo.Fonts/Semi.Avalonia.Demo.Fonts.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia"/>
+  </ItemGroup>
+</Project>

demo/Semi.Avalonia.Demo.Web/AvaloniaAppBuilderExtensions.cs

@@ -1,16 +0,0 @@
-using Avalonia;
-using Avalonia.Media;
-
-namespace Semi.Avalonia.Demo.Web;
-
-public static class AvaloniaAppBuilderExtensions
-{
-    private static string DefaultFontFamily => "avares://Semi.Avalonia.Demo.Web/Assets#Source Han Sans CN";
-
-    public static AppBuilder WithSourceHanSansCNFont(this AppBuilder builder) =>
-        builder.With(new FontManagerOptions
-        {
-            DefaultFamilyName = DefaultFontFamily,
-            FontFallbacks = [new FontFallback { FontFamily = new FontFamily(DefaultFontFamily) }]
-        });
-}

demo/Semi.Avalonia.Demo.Web/Program.cs

@@ -2,6 +2,7 @@
 using System.Threading.Tasks;
 using Avalonia;
 using Avalonia.Browser;
+using Semi.Avalonia.Demo.Fonts;
 
 [assembly: SupportedOSPlatform("browser")]
 

demo/Semi.Avalonia.Demo.Web/Semi.Avalonia.Demo.Web.csproj

@@ -6,15 +6,12 @@
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
-    <ItemGroup>
-        <AvaloniaResource Include="..\Fonts\*" Link="Assets\Fonts\%(Filename)%(Extension)" />
-    </ItemGroup>
-
     <ItemGroup>
         <PackageReference Include="Avalonia.Browser"/>
     </ItemGroup>
 
     <ItemGroup>
         <ProjectReference Include="..\Semi.Avalonia.Demo\Semi.Avalonia.Demo.csproj"/>
+        <ProjectReference Include="..\Semi.Avalonia.Demo.Fonts\Semi.Avalonia.Demo.Fonts.csproj"/>
     </ItemGroup>
 </Project>

demo/Semi.Avalonia.Demo/App.axaml

@@ -5,6 +5,7 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:semi="https://irihi.tech/semi"
     xmlns:vm="clr-namespace:Semi.Avalonia.Demo.ViewModels"
+    RequestedThemeVariant="Default"
     x:DataType="vm:ApplicationViewModel">
     <Application.Styles>
         <semi:SemiTheme Locale="zh-CN" />

demo/Semi.Avalonia.Demo/App.axaml.cs

@@ -1,6 +1,6 @@
+using System;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
-using Avalonia.Data.Core.Plugins;
 using Avalonia.Markup.Xaml;
 using Semi.Avalonia.Demo.ViewModels;
 using Semi.Avalonia.Demo.Views;
@@ -15,22 +15,26 @@ public partial class App : Application
 #if DEBUG
         this.AttachDeveloperTools();
 #endif
-        this.DataContext = new ApplicationViewModel();
+        DataContext = new ApplicationViewModel();
+        if (OperatingSystem.IsLinux())
+        {
+            Resources.Add("DefaultFontFamily", null);
+        }
     }
 
     public override void OnFrameworkInitializationCompleted()
     {
-        switch (ApplicationLifetime)
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
         {
-            case IClassicDesktopStyleApplicationLifetime desktop:
-                // Line below is needed to remove Avalonia data validation.
-                // Without this line you will get duplicate validations from both Avalonia and CT
-                // BindingPlugins.DataValidators.RemoveAt(0);
-                desktop.MainWindow = new MainWindow();
-                break;
-            case ISingleViewApplicationLifetime singleView:
-                singleView.MainView = new MainView();
-                break;
+            desktop.MainWindow = new MainWindow { DataContext = new MainViewModel() };
+        }
+        else if (ApplicationLifetime is IActivityApplicationLifetime applicationLifetime)
+        {
+            applicationLifetime.MainViewFactory = () => new MainView { DataContext = new MainViewModel() };
+        }
+        else if (ApplicationLifetime is ISingleViewApplicationLifetime singleViewPlatform)
+        {
+            singleViewPlatform.MainView = new MainView { DataContext = new MainViewModel() };
         }
 
         this.RegisterFollowSystemTheme();

demo/Semi.Avalonia.Demo/Semi.Avalonia.Demo.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <Nullable>enable</Nullable>
         <LangVersion>latest</LangVersion>
     </PropertyGroup>

demo/global.json

@@ -1,5 +0,0 @@
-{
-    "sdk": {
-        "version": "8.0"
-    }
-}

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.0",
+    "version": "10.0.0",
     "rollForward": "latestMajor",
     "allowPrerelease": true
   }

src/Semi.Avalonia/Controls/WindowDrawnDecorations.axaml

@@ -46,8 +46,8 @@
 
     <ControlTheme x:Key="{x:Type WindowDrawnDecorations}" TargetType="WindowDrawnDecorations">
         <Setter Property="DefaultTitleBarHeight" Value="32" />
-        <Setter Property="DefaultFrameThickness" Value="1" />
-        <Setter Property="DefaultShadowThickness" Value="8" />
+        <Setter Property="DefaultFrameThickness" Value="4" />
+        <!-- <Setter Property="DefaultShadowThickness" Value="8" /> -->
         <Setter Property="Template">
             <WindowDrawnDecorationsTemplate>
                 <WindowDrawnDecorationsContent>
@@ -189,16 +189,16 @@
 
         <!-- Hide caption buttons when the platform does not support the action -->
         <Style Selector="^:not(:has-minimize) /template/ Button#PART_MinimizeButton">
-            <Setter Property="IsVisible" Value="False"/>
+            <Setter Property="IsVisible" Value="False" />
         </Style>
         <Style Selector="^:not(:has-maximize) /template/ Button#PART_MaximizeButton">
-            <Setter Property="IsVisible" Value="False"/>
+            <Setter Property="IsVisible" Value="False" />
         </Style>
         <Style Selector="^:not(:has-fullscreen) /template/ Button#PART_FullScreenButton">
-            <Setter Property="IsVisible" Value="False"/>
+            <Setter Property="IsVisible" Value="False" />
         </Style>
         <Style Selector="^:not(:has-fullscreen) /template/ Button#PART_PopoverFullScreenButton">
-            <Setter Property="IsVisible" Value="False"/>
+            <Setter Property="IsVisible" Value="False" />
         </Style>
 
         <!--  Fullscreen: hide overlay and titlebar (popover takes over)  -->

src/Semi.Avalonia/Themes/Dark/WindowDrawnDecorations.axaml

@@ -1,6 +1,8 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <SolidColorBrush x:Key="WindowBackground">Transparent</SolidColorBrush>
+    <StaticResource x:Key="WindowBorderBrush" ResourceKey="SemiColorBorder" />
     <StaticResource x:Key="WindowBorderShadow" ResourceKey="SemiShadowElevated" />
-    <StaticResource x:Key="TitleBarBackground" ResourceKey="SemiColorBackground0" />
+    <SolidColorBrush x:Key="TitleBarBackground">Transparent</SolidColorBrush>
 
     <StaticResource x:Key="CaptionButtonPointeroverBackground" ResourceKey="SemiColorFill1" />
     <StaticResource x:Key="CaptionButtonPressedBackground" ResourceKey="SemiColorFill2" />

src/Semi.Avalonia/Themes/HighContrast/WindowDrawnDecorations.axaml

@@ -1,5 +1,7 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-    <StaticResource x:Key="TitleBarBackground" ResourceKey="SemiColorWindow" />
+    <SolidColorBrush x:Key="WindowBackground">Transparent</SolidColorBrush>
+    <StaticResource x:Key="WindowBorderBrush" ResourceKey="SemiColorWindowText" />
+    <SolidColorBrush x:Key="TitleBarBackground">Transparent</SolidColorBrush>
 
     <StaticResource x:Key="CaptionButtonPointeroverBackground" ResourceKey="SemiColorHotlight" />
     <StaticResource x:Key="CaptionButtonPressedBackground" ResourceKey="SemiColorHotlight" />

src/Semi.Avalonia/Themes/Light/WindowDrawnDecorations.axaml

@@ -1,6 +1,8 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <SolidColorBrush x:Key="WindowBackground">Transparent</SolidColorBrush>
+    <StaticResource x:Key="WindowBorderBrush" ResourceKey="SemiColorBorder" />
     <StaticResource x:Key="WindowBorderShadow" ResourceKey="SemiShadowElevated" />
-    <StaticResource x:Key="TitleBarBackground" ResourceKey="SemiColorBackground0" />
+    <SolidColorBrush x:Key="TitleBarBackground">Transparent</SolidColorBrush>
 
     <StaticResource x:Key="CaptionButtonPointeroverBackground" ResourceKey="SemiColorFill1" />
     <StaticResource x:Key="CaptionButtonPressedBackground" ResourceKey="SemiColorFill2" />