style: border-less window style on Linux platform.

README.md

@@ -26,6 +26,8 @@ Opensouce Git GUI client.
   * Revision Diffs
 * GitFlow support
 
+> **Linux** only tested on `Ubuntu 22.04` on `X11`.
+
 ## How to use
 
 **To use this tool, you need to install Git first.**
@@ -43,7 +45,6 @@ For **macOS** users:
 For **Linux** users:
 
 * `xdg-open` must be installed to support open native file manager.
-* Only tested on `Ubuntu 22.04`.
 
 ## Screen Shots
 

src/App.axaml.cs

@@ -50,7 +50,7 @@ namespace SourceGit {
                 manager.AddFontCollection(monospace);
             });
 
-            Native.OS.SetupFonts(builder);
+            Native.OS.SetupApp(builder);
             return builder;
         }
 

src/Converters/WindowStateConverters.cs

@@ -2,13 +2,15 @@
 using Avalonia.Data.Converters;
 using Avalonia.Media;
 using Avalonia;
-using System.Runtime.InteropServices;
+using System;
 
 namespace SourceGit.Converters {
     public static class WindowStateConverters {
         public static FuncValueConverter<WindowState, Thickness> ToContentMargin =
             new FuncValueConverter<WindowState, Thickness>(state => {
-                if (state == WindowState.Maximized && RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
+                if (OperatingSystem.IsWindows() && state == WindowState.Maximized) {
+                    return new Thickness(6);
+                } else if (OperatingSystem.IsLinux() && state != WindowState.Maximized) {
                     return new Thickness(6);
                 } else {
                     return new Thickness(0);
@@ -17,7 +19,7 @@ namespace SourceGit.Converters {
 
         public static FuncValueConverter<WindowState, GridLength> ToTitleBarHeight =
             new FuncValueConverter<WindowState, GridLength>(state => {
-                if (state == WindowState.Maximized && RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
+                if (state == WindowState.Maximized) {
                     return new GridLength(30);
                 } else {
                     return new GridLength(38);

src/Native/Linux.cs

@@ -6,7 +6,7 @@ using System.Runtime.Versioning;
 namespace SourceGit.Native {
     [SupportedOSPlatform("linux")]
     internal class Linux : OS.IBackend {
-        public void SetupFonts(AppBuilder builder) {
+        public void SetupApp(AppBuilder builder) {
         #if USE_FONT_INTER
             builder.WithInterFont();
         #endif

src/Native/MacOS.cs

@@ -8,7 +8,7 @@ using System.Text;
 namespace SourceGit.Native {
     [SupportedOSPlatform("macOS")]
     internal class MacOS : OS.IBackend {
-        public void SetupFonts(AppBuilder builder) {
+        public void SetupApp(AppBuilder builder) {
             builder.With(new FontManagerOptions() {
                 DefaultFamilyName = "PingFang SC",
                 FontFallbacks = [

src/Native/OS.cs

@@ -5,7 +5,7 @@ using System.Diagnostics;
 namespace SourceGit.Native {
     public static class OS {
         public interface IBackend {
-            void SetupFonts(AppBuilder builder);
+            void SetupApp(AppBuilder builder);
 
             string FindGitExecutable();
             string FindVSCode();
@@ -41,8 +41,8 @@ namespace SourceGit.Native {
             }
         }
 
-        public static void SetupFonts(AppBuilder builder) {
+        public static void SetupApp(AppBuilder builder) {
-            _backend?.SetupFonts(builder);
+            _backend?.SetupApp(builder);
         }
 
         public static string FindGitExecutable() {

src/Native/Windows.cs

@@ -13,7 +13,7 @@ namespace SourceGit.Native {
         [DllImport("shlwapi.dll", CharSet = CharSet.Unicode, SetLastError = false)]
         private static extern bool PathFindOnPath([In, Out] StringBuilder pszFile, [In] string[] ppszOtherDirs);
 
-        public void SetupFonts(AppBuilder builder) {
+        public void SetupApp(AppBuilder builder) {
             builder.With(new FontManagerOptions() {
                 DefaultFamilyName = "Microsoft YaHei UI",
                 FontFallbacks = [

src/Views/About.axaml

@@ -9,24 +9,32 @@
         x:DataType="v:About"
         Icon="/App.ico"
         Title="{DynamicResource Text.About}"
-        Background="{DynamicResource Brush.Window}"
+        Background="Transparent"
         SizeToContent="WidthAndHeight"
         CanResize="False"
         WindowStartupLocation="CenterScreen"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Grid RowDefinitions="Auto,*">
-    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{OnPlatform True, Linux=False}">
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- TitleBar -->
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30">
       <Border Grid.Column="0" Grid.ColumnSpan="3"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
-              IsHitTestVisible="False"/>
+              PointerPressed="BeginMoveWindow"/>
       
       <Path Grid.Column="0"
             Width="14" Height="14"
             Margin="10,0,0,0"
             Data="{StaticResource Icons.Info}"
-            IsVisible="{OnPlatform False, Windows=True}"/>
+            IsVisible="{OnPlatform True, macOS=False}"/>
 
       <Grid Grid.Column="0" Classes="caption_button_box" Margin="2,4,0,0" IsVisible="{OnPlatform False, macOS=True}">
         <Button Classes="caption_button_macos" Click="CloseWindow">
@@ -46,12 +54,12 @@
       <Button Grid.Column="2"
               Classes="caption_button"
               Click="CloseWindow"
-              IsVisible="{OnPlatform False, Windows=True}">
+              IsVisible="{OnPlatform True, macOS=False}">
         <Path Data="{StaticResource Icons.Window.Close}"/>
       </Button>
     </Grid>
 
-    <Grid Grid.Row="1" ColumnDefinitions="Auto,*">
+    <Grid Grid.Row="1" ColumnDefinitions="Auto,*" Background="{DynamicResource Brush.Window}">
       <Image Grid.Column="0"
              Width="200" Height="200"
              Margin="8,0"

src/Views/About.axaml.cs

@@ -17,6 +17,10 @@ namespace SourceGit.Views {
             InitializeComponent();
         }
 
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         private void CloseWindow(object sender, RoutedEventArgs e) {
             Close();
         }

src/Views/AssumeUnchangedManager.axaml

@@ -10,25 +10,32 @@
         x:DataType="vm:AssumeUnchangedManager"
         Icon="/App.ico"
         Title="{DynamicResource Text.AssumeUnchanged}"
-        Background="{DynamicResource Brush.Window}"
+        Background="Transparent"
         Width="600" Height="400"
         CanResize="False"
         WindowStartupLocation="CenterOwner"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Grid RowDefinitions="Auto,*">
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+    
     <!-- TitleBar -->
-    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{OnPlatform True, Linux=False}">
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30">
       <Border Grid.Column="0" Grid.ColumnSpan="3"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
-              IsHitTestVisible="False"/>
+              PointerPressed="BeginMoveWindow"/>
       
       <Path Grid.Column="0"
             Width="14" Height="14"
             Margin="10,0,0,0"
             Data="{StaticResource Icons.File.Ignore}"
-            IsVisible="{OnPlatform False, Windows=True}"/>
+            IsVisible="{OnPlatform True, macOS=False}"/>
 
       <Grid Grid.Column="0" Classes="caption_button_box" Margin="2,4,0,0" IsVisible="{OnPlatform False, macOS=True}">
         <Button Classes="caption_button_macos" Click="CloseWindow">
@@ -48,14 +55,14 @@
       <Button Grid.Column="2"
               Classes="caption_button"
               Click="CloseWindow"
-              IsVisible="{OnPlatform False, Windows=True}">
+              IsVisible="{OnPlatform True, macOS=False}">
         <Path Data="{StaticResource Icons.Window.Close}"/>
       </Button>
     </Grid>
     
     <!-- Unchanged Files -->
-    <DataGrid Grid.Row="1"
+    <Grid Grid.Row="1" Background="{DynamicResource Brush.Window}">
-              Margin="8"
+      <DataGrid Margin="8"
                 Background="{DynamicResource Brush.Contents}"
                 ItemsSource="{Binding Files}"
                 SelectionMode="Single"
@@ -97,12 +104,12 @@
       </DataGrid>
 
       <!-- Empty -->
-    <StackPanel Grid.Row="2"
+      <StackPanel Orientation="Vertical"
-                Orientation="Vertical"
                   HorizontalAlignment="Center" VerticalAlignment="Center"
                   IsVisible="{Binding Files.Count, Converter={x:Static c:IntConverters.IsZero}}">
         <Path Width="48" Height="48" Data="{StaticResource Icons.Empty}" Fill="{DynamicResource Brush.FG2}"/>
         <TextBlock Margin="0,16,0,0" Text="{DynamicResource Text.AssumeUnchanged.Empty}" Foreground="{DynamicResource Brush.FG2}"/>
       </StackPanel>
     </Grid>    
+  </Grid>
 </Window>

src/Views/AssumeUnchangedManager.axaml.cs

@@ -1,4 +1,5 @@
 using Avalonia.Controls;
+using Avalonia.Input;
 using Avalonia.Interactivity;
 
 namespace SourceGit.Views {
@@ -7,6 +8,10 @@ namespace SourceGit.Views {
             InitializeComponent();
         }
 
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         private void CloseWindow(object sender, RoutedEventArgs e) {
             Close();
         }

src/Views/Blame.axaml

@@ -12,25 +12,32 @@
         x:DataType="vm:Blame"
         Icon="/App.ico"
         Title="{DynamicResource Text.Blame}"
+        Background="Transparent"
         WindowStartupLocation="CenterOwner"
-        BorderThickness="1"
-        BorderBrush="{DynamicResource Brush.Border0}"
-        Background="{DynamicResource Brush.Window}"
         MinWidth="1280" MinHeight="720"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Grid Margin="{Binding #me.WindowState, Converter={x:Static c:WindowStateConverters.ToContentMargin}}">
     <Grid.RowDefinitions>
       <RowDefinition Height="30"/>
       <RowDefinition Height="*"/>
     </Grid.RowDefinitions>
 
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- TitleBar -->
     <Grid Grid.Row="0" ColumnDefinitions="Auto,Auto,Auto,*,Auto">
       <!-- Bottom border -->
       <Border Grid.Column="0" Grid.ColumnSpan="5"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border2}"
-              IsHitTestVisible="False"/>
+              DoubleTapped="MaximizeOrRestoreWindow"
+              PointerPressed="BeginMoveWindow"/>
 
       <!-- Caption Buttons (macOS) -->
       <Border Grid.Column="0" IsVisible="{OnPlatform False, macOS=True}">
@@ -40,19 +47,20 @@
       <!-- Icon -->
       <Path Grid.Column="1" Margin="8,0,0,0" Width="12" Height="12" Data="{StaticResource Icons.Blame}"/>
 
-      <!-- Title (Hide on Linux) -->
+      <!-- Title -->
-      <TextBlock Grid.Column="2" Margin="8,0,0,0" Text="{DynamicResource Text.Blame}" FontWeight="Bold" IsHitTestVisible="False" VerticalAlignment="Center" IsVisible="{OnPlatform True, Linux=False}"/>
+      <TextBlock Grid.Column="2" Margin="8,0,0,0" Text="{DynamicResource Text.Blame}" FontWeight="Bold" IsHitTestVisible="False" VerticalAlignment="Center"/>
 
       <!-- Blame information -->
       <TextBlock Grid.Column="3" Margin="8,0,0,0" Text="{Binding Title}" FontSize="11" FontStyle="Italic" IsHitTestVisible="False" VerticalAlignment="Center"/>
 
-      <!-- Caption Buttons (Windows) -->
+      <!-- Caption Buttons (Windows/Linux) -->
-      <Border Grid.Column="4" IsVisible="{OnPlatform False, Windows=True}">
+      <Border Grid.Column="4" IsVisible="{OnPlatform True, macOS=False}">
         <v:CaptionButtons/>
       </Border>
     </Grid>
 
-    <Grid Grid.Row="1">
+    <!-- Body -->
+    <Grid Grid.Row="1" Background="{DynamicResource Brush.Window}">
       <!-- Blame View -->
       <v:BlameTextEditor HorizontalScrollBarVisibility="Auto"
                          VerticalScrollBarVisibility="Auto" 
@@ -78,5 +86,64 @@
             Data="{StaticResource Icons.Loading}" 
             IsVisible="{Binding Data, Converter={x:Static ObjectConverters.IsNull}}"/>
     </Grid>
+
+    <!-- Custom window sizer for Linux -->
+    <Grid Grid.Row="0" Grid.RowSpan="2" IsVisible="{OnPlatform False, Linux=True}">
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Top"
+              Cursor="TopLeftCorner"
+              Tag="{x:Static WindowEdge.NorthWest}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Height="4" Margin="4,0"
+              Background="Transparent"
+              HorizontalAlignment="Stretch" VerticalAlignment="Top"
+              Cursor="TopSide"
+              Tag="{x:Static WindowEdge.North}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Top"
+              Cursor="TopRightCorner"
+              Tag="{x:Static WindowEdge.NorthEast}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Margin="0,4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Stretch"
+              Cursor="LeftSide"
+              Tag="{x:Static WindowEdge.West}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Margin="0,4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Stretch"
+              Cursor="RightSide"
+              Tag="{x:Static WindowEdge.East}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Bottom"
+              Cursor="BottomLeftCorner"
+              Tag="{x:Static WindowEdge.SouthWest}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Height="4" Margin="4,0"
+              Background="Transparent"
+              HorizontalAlignment="Stretch" VerticalAlignment="Bottom"
+              Cursor="BottomSide"
+              Tag="{x:Static WindowEdge.South}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Bottom"
+              Cursor="BottomRightCorner"
+              Tag="{x:Static WindowEdge.SouthEast}"
+              PointerPressed="CustomResizeWindow"/>
+    </Grid>
   </Grid>
 </Window>

src/Views/Blame.axaml.cs

@@ -308,6 +308,27 @@ namespace SourceGit.Views {
             InitializeComponent();
         }
 
+        private void MaximizeOrRestoreWindow(object sender, TappedEventArgs e) {
+            if (WindowState == WindowState.Maximized) {
+                WindowState = WindowState.Normal;
+            } else {
+                WindowState = WindowState.Maximized;
+            }
+            e.Handled = true;
+        }
+
+        private void CustomResizeWindow(object sender, PointerPressedEventArgs e) {
+            if (sender is Border border) {
+                if (border.Tag is WindowEdge edge) {
+                    BeginResizeDrag(edge, e);
+                }
+            }
+        }
+
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         protected override void OnClosed(EventArgs e) {
             base.OnClosed(e);
             GC.Collect();

src/Views/FileHistories.axaml

@@ -12,24 +12,31 @@
         x:Name="me"
         Icon="/App.ico"
         Title="{DynamicResource Text.FileHistory}"
+        Background="Transparent"
         MinWidth="1280" MinHeight="720"
-        BorderThickness="1"
+        ExtendClientAreaToDecorationsHint="True"
-        BorderBrush="{DynamicResource Brush.Border0}"
+        ExtendClientAreaChromeHints="NoChrome"
-        Background="{DynamicResource Brush.Window}"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
   <Grid Margin="{Binding #me.WindowState, Converter={x:Static c:WindowStateConverters.ToContentMargin}}">
     <Grid.RowDefinitions>
       <RowDefinition Height="30"/>
       <RowDefinition Height="*"/>
     </Grid.RowDefinitions>
 
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- TitleBar -->
     <Grid Grid.Row="0" ColumnDefinitions="Auto,Auto,Auto,*,Auto">
       <!-- Bottom border -->
       <Border Grid.Column="0" Grid.ColumnSpan="5"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
-              IsHitTestVisible="False"/>
+              DoubleTapped="MaximizeOrRestoreWindow"
+              PointerPressed="BeginMoveWindow"/>
 
       <!-- Caption Buttons (macOS) -->
       <Border Grid.Column="0" IsVisible="{OnPlatform False, macOS=True}">
@@ -39,19 +46,20 @@
       <!-- Icon -->
       <Path Grid.Column="1" Margin="8,0,0,0" Width="12" Height="12" Stretch="Uniform" Data="{StaticResource Icons.Histories}"/>
 
-      <!-- Title (Hide on Linux) -->
+      <!-- Title -->
-      <TextBlock Grid.Column="2" Margin="4,0,0,0" Text="{DynamicResource Text.FileHistory}" FontWeight="Bold" IsHitTestVisible="False" VerticalAlignment="Center" IsVisible="{OnPlatform True, Linux=False}"/>
+      <TextBlock Grid.Column="2" Margin="4,0,0,0" Text="{DynamicResource Text.FileHistory}" FontWeight="Bold" IsHitTestVisible="False" VerticalAlignment="Center"/>
 
       <!-- Target File -->
       <TextBlock Grid.Column="3" Margin="8,0,0,0" Text="{Binding File}" FontSize="11" FontStyle="Italic" IsHitTestVisible="False" VerticalAlignment="Center"/>
 
-      <!-- Caption Buttons (Windows) -->
+      <!-- Caption Buttons (Windows/Linux) -->
-      <Border Grid.Column="4" IsVisible="{OnPlatform False, Windows=true}">
+      <Border Grid.Column="4" IsVisible="{OnPlatform True, macOS=False}">
         <v:CaptionButtons/>
       </Border>
     </Grid>
 
-    <Grid Grid.Row="1">
+    <!-- Body -->
+    <Grid Grid.Row="1" Background="{DynamicResource Brush.Window}">
       <Grid.ColumnDefinitions>
         <ColumnDefinition Width="300" MinWidth="300" MaxWidth="600"/>
         <ColumnDefinition Width="1"/>
@@ -109,5 +117,64 @@
         </ContentControl>
       </Grid>
     </Grid>
+
+    <!-- Custom window sizer for Linux -->
+    <Grid Grid.Row="0" Grid.RowSpan="2" IsVisible="{OnPlatform False, Linux=True}">
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Top"
+              Cursor="TopLeftCorner"
+              Tag="{x:Static WindowEdge.NorthWest}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Height="4" Margin="4,0"
+              Background="Transparent"
+              HorizontalAlignment="Stretch" VerticalAlignment="Top"
+              Cursor="TopSide"
+              Tag="{x:Static WindowEdge.North}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Top"
+              Cursor="TopRightCorner"
+              Tag="{x:Static WindowEdge.NorthEast}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Margin="0,4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Stretch"
+              Cursor="LeftSide"
+              Tag="{x:Static WindowEdge.West}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Margin="0,4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Stretch"
+              Cursor="RightSide"
+              Tag="{x:Static WindowEdge.East}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Bottom"
+              Cursor="BottomLeftCorner"
+              Tag="{x:Static WindowEdge.SouthWest}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Height="4" Margin="4,0"
+              Background="Transparent"
+              HorizontalAlignment="Stretch" VerticalAlignment="Bottom"
+              Cursor="BottomSide"
+              Tag="{x:Static WindowEdge.South}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Bottom"
+              Cursor="BottomRightCorner"
+              Tag="{x:Static WindowEdge.SouthEast}"
+              PointerPressed="CustomResizeWindow"/>
+    </Grid>
   </Grid>
 </Window>

src/Views/FileHistories.axaml.cs

@@ -7,6 +7,27 @@ namespace SourceGit.Views {
             InitializeComponent();
         }
 
+        private void MaximizeOrRestoreWindow(object sender, TappedEventArgs e) {
+            if (WindowState == WindowState.Maximized) {
+                WindowState = WindowState.Normal;
+            } else {
+                WindowState = WindowState.Maximized;
+            }
+            e.Handled = true;
+        }
+
+        private void CustomResizeWindow(object sender, PointerPressedEventArgs e) {
+            if (sender is Border border) {
+                if (border.Tag is WindowEdge edge) {
+                    BeginResizeDrag(edge, e);
+                }
+            }
+        }
+
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         private void OnPressedSHA(object sender, PointerPressedEventArgs e) {
             if (sender is TextBlock block) {
                 var histories = DataContext as ViewModels.FileHistories;

src/Views/Hotkeys.axaml

@@ -7,24 +7,32 @@
         x:Class="SourceGit.Views.Hotkeys"
         Icon="/App.ico"
         Title="{DynamicResource Text.Hotkeys}"
-        Background="{DynamicResource Brush.Window}"
+        Background="Transparent"
         SizeToContent="WidthAndHeight"
         CanResize="False"
         WindowStartupLocation="CenterOwner"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Grid RowDefinitions="Auto,*">
-    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{OnPlatform True, Linux=False}">
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- TitleBar -->
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30">
       <Border Grid.Column="0" Grid.ColumnSpan="3"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
-              IsHitTestVisible="False"/>
+              PointerPressed="BeginMoveWindow"/>
       
       <Path Grid.Column="0"
             Width="14" Height="14"
             Margin="10,0,0,0"
             Data="{StaticResource Icons.Hotkeys}"
-            IsVisible="{OnPlatform False, Windows=True}"/>
+            IsVisible="{OnPlatform True, macOS=False}"/>
 
       <Grid Grid.Column="0" Classes="caption_button_box" Margin="2,4,0,0" IsVisible="{OnPlatform False, macOS=True}">
         <Button Classes="caption_button_macos" Click="CloseWindow">
@@ -44,12 +52,14 @@
       <Button Grid.Column="2"
               Classes="caption_button"
               Click="CloseWindow"
-              IsVisible="{OnPlatform False, Windows=True}">
+              IsVisible="{OnPlatform True, macOS=False}">
         <Path Data="{StaticResource Icons.Window.Close}"/>
       </Button>
     </Grid>
 
-    <StackPanel Grid.Row="1" Orientation="Vertical" Margin="16,8,16,16">
+    <!-- Body -->
+    <Border Grid.Row="1" Background="{DynamicResource Brush.Window}">
+      <StackPanel Orientation="Vertical" Margin="16,8,16,16">
         <TextBlock Text="{DynamicResource Text.Hotkeys.Global}"
                    Foreground="{DynamicResource Brush.FG2}"
                    FontWeight="Bold"
@@ -113,5 +123,6 @@
           <TextBlock Grid.Row="3" Grid.Column="1" Margin="16,0,0,0" Text="{DynamicResource Text.Hotkeys.TextEditor.CloseSearch}" />
         </Grid>
       </StackPanel>
+    </Border>    
   </Grid>
 </Window>

src/Views/Hotkeys.axaml.cs

@@ -1,4 +1,5 @@
 using Avalonia.Controls;
+using Avalonia.Input;
 using Avalonia.Interactivity;
 
 namespace SourceGit.Views {
@@ -7,6 +8,10 @@ namespace SourceGit.Views {
             InitializeComponent();
         }
 
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         private void CloseWindow(object sender, RoutedEventArgs e) {
             Close();
         }

src/Views/Launcher.axaml

@@ -12,13 +12,12 @@
         x:Name="me"
         Icon="/App.ico"
         Title="SourceGit"
-        BorderThickness="1"
+        Background="Transparent"
-        BorderBrush="{DynamicResource Brush.Border0}"
-        Background="{DynamicResource Brush.Window}"
         MinWidth="1280" MinHeight="720"
         WindowStartupLocation="CenterScreen"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Window.Resources>
     <SolidColorBrush x:Key="SystemControlErrorTextForegroundBrush" Color="Red"/>
   </Window.Resources>
@@ -29,12 +28,20 @@
       <RowDefinition Height="*"/>
     </Grid.RowDefinitions>
 
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- Custom TitleBar -->
     <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto">
       <!-- Bottom border -->
       <Border Grid.Column="0" Grid.ColumnSpan="3"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
-              IsHitTestVisible="False"/>
+              DoubleTapped="MaximizeOrRestoreWindow"
+              PointerPressed="BeginMoveWindow"/>
 
       <!-- Caption Buttons (macOS) -->
       <Border Grid.Column="0" VerticalAlignment="Stretch" Margin="2,0,8,3" IsVisible="{OnPlatform False, macOS=True}">
@@ -233,8 +240,8 @@
         </Button>
       </StackPanel>
 
-      <!-- Caption Buttons (Windows)-->
+      <!-- Caption Buttons (Windows/Linux)-->
-      <Border Grid.Column="2" Margin="32,0,0,0" IsVisible="{OnPlatform False, Windows=True}">
+      <Border Grid.Column="2" Margin="32,0,0,0" IsVisible="{OnPlatform True, macOS=False}">
         <v:CaptionButtons Height="30" VerticalAlignment="Top"/>
       </Border>
     </Grid>
@@ -364,5 +371,64 @@
         </ItemsControl>
       </ScrollViewer>
     </Grid>
+
+    <!-- Custom window sizer for Linux -->
+    <Grid Grid.Row="0" Grid.RowSpan="2" IsVisible="{OnPlatform False, Linux=True}">
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Top"
+              Cursor="TopLeftCorner"
+              Tag="{x:Static WindowEdge.NorthWest}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Height="4" Margin="4,0"
+              Background="Transparent"
+              HorizontalAlignment="Stretch" VerticalAlignment="Top"
+              Cursor="TopSide"
+              Tag="{x:Static WindowEdge.North}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Top"
+              Cursor="TopRightCorner"
+              Tag="{x:Static WindowEdge.NorthEast}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Margin="0,4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Stretch"
+              Cursor="LeftSide"
+              Tag="{x:Static WindowEdge.West}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Margin="0,4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Stretch"
+              Cursor="RightSide"
+              Tag="{x:Static WindowEdge.East}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Left" VerticalAlignment="Bottom"
+              Cursor="BottomLeftCorner"
+              Tag="{x:Static WindowEdge.SouthWest}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Height="4" Margin="4,0"
+              Background="Transparent"
+              HorizontalAlignment="Stretch" VerticalAlignment="Bottom"
+              Cursor="BottomSide"
+              Tag="{x:Static WindowEdge.South}"
+              PointerPressed="CustomResizeWindow"/>
+
+      <Border Width="4" Height="4"
+              Background="Transparent"
+              HorizontalAlignment="Right" VerticalAlignment="Bottom"
+              Cursor="BottomRightCorner"
+              Tag="{x:Static WindowEdge.SouthEast}"
+              PointerPressed="CustomResizeWindow"/>
+    </Grid>
   </Grid>
 </Window>

src/Views/Launcher.axaml.cs

@@ -126,6 +126,14 @@ namespace SourceGit.Views {
             e.Handled = true;
         }
 
+        private void CustomResizeWindow(object sender, PointerPressedEventArgs e) {
+            if (sender is Border border) {
+                if (border.Tag is WindowEdge edge) {
+                    BeginResizeDrag(edge, e);
+                }
+            }
+        }
+
         private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
             BeginMoveDrag(e);
         }

src/Views/Preference.axaml

@@ -13,24 +13,32 @@
         x:Name="me"
         Icon="/App.ico"
         Title="{DynamicResource Text.Preference}"
-        Background="{DynamicResource Brush.Window}"
+        Background="Transparent"
         Width="600" SizeToContent="Height"
         CanResize="False"
         WindowStartupLocation="CenterScreen"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Grid RowDefinitions="Auto,Auto">
-    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{OnPlatform True, Linux=False}">
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- TitleBar -->
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30">
       <Border Grid.Column="0" Grid.ColumnSpan="3"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
-              IsHitTestVisible="False"/>
+              PointerPressed="BeginMoveWindow"/>
 
       <Path Grid.Column="0"
             Width="14" Height="14"
             Data="{StaticResource Icons.Settings2}"
             Margin="10,0,0,0"
-            IsVisible="{OnPlatform False, Windows=True}"/>
+            IsVisible="{OnPlatform True, macOS=False}"/>
 
       <Grid Grid.Column="0" Classes="caption_button_box" Margin="2,4,0,0" IsVisible="{OnPlatform False, macOS=True}">
         <Button Classes="caption_button_macos" Click="CloseWindow">
@@ -47,12 +55,14 @@
                  HorizontalAlignment="Center" VerticalAlignment="Center"
                  IsHitTestVisible="False"/>
 
-      <Button Grid.Column="2" Classes="caption_button" Click="CloseWindow" IsVisible="{OnPlatform False, Windows=True}">
+      <Button Grid.Column="2" Classes="caption_button" Click="CloseWindow" IsVisible="{OnPlatform True, macOS=False}">
         <Path Data="{StaticResource Icons.Window.Close}"/>
       </Button>
     </Grid>
 
-    <TabControl Grid.Row="1">
+    <!-- Body -->
+    <Border Grid.Row="1" Background="{DynamicResource Brush.Window}">
+      <TabControl>
         <TabItem>
           <TabItem.Header>
             <TextBlock Classes="tab_header" Text="{DynamicResource Text.Preference.General}"/>
@@ -328,5 +338,6 @@
           </Grid>
         </TabItem>
       </TabControl>
+    </Border>    
   </Grid>
 </Window>

src/Views/Preference.axaml.cs

@@ -1,4 +1,5 @@
 using Avalonia.Controls;
+using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Platform.Storage;
 using System;
@@ -58,6 +59,10 @@ namespace SourceGit.Views {
             txtVersion.Text = ver;
         }
 
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         private void CloseWindow(object sender, RoutedEventArgs e) {
             var cmd = new Commands.Config(null);
 

src/Views/Statistics.axaml

@@ -9,15 +9,27 @@
         x:Class="SourceGit.Views.Statistics"
         x:DataType="vm:Statistics"
         Title="{DynamicResource Text.Statistics}"
-        Background="{DynamicResource Brush.Window}"
+        Background="Transparent"
         Width="800" Height="450"
         WindowStartupLocation="CenterOwner"
         CanResize="False"
-        ExtendClientAreaToDecorationsHint="{OnPlatform True, Linux=False}"
+        ExtendClientAreaToDecorationsHint="True"
-        ExtendClientAreaChromeHints="{OnPlatform NoChrome, Linux=Default}">
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
   <Grid RowDefinitions="Auto,Auto,*">
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="3"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- Window BG -->
+    <Border Grid.Row="1" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            IsVisible="{OnPlatform True, Linux=False}"/>
+    
     <!-- Title bar -->
-    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{OnPlatform True, Linux=False}">
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30">
       <Border Grid.Column="0" Grid.ColumnSpan="3"
               Background="{DynamicResource Brush.TitleBar}"
               BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
@@ -27,7 +39,7 @@
             Width="14" Height="14"
             Margin="10,0,0,0"
             Data="{StaticResource Icons.Statistics}"
-            IsVisible="{OnPlatform False, Windows=True}"/>
+            IsVisible="{OnPlatform True, macOS=False}"/>
 
       <Grid Grid.Column="0" Classes="caption_button_box" Margin="2,4,0,0" IsVisible="{OnPlatform False, macOS=True}">
         <Button Classes="caption_button_macos" Click="CloseWindow">
@@ -47,7 +59,7 @@
       <Button Grid.Column="2"
               Classes="caption_button"
               Click="CloseWindow"
-              IsVisible="{OnPlatform False, Windows=True}">
+              IsVisible="{OnPlatform True, macOS=False}">
         <Path Data="{StaticResource Icons.Window.Close}"/>
       </Button>
     </Grid>

src/Views/Statistics.axaml.cs

@@ -191,6 +191,10 @@ namespace SourceGit.Views {
             InitializeComponent();
         }
 
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e) {
+            BeginMoveDrag(e);
+        }
+
         private void CloseWindow(object sender, RoutedEventArgs e) {
             Close();
         }