sourcegit/src/SourceGit/Views/DiffView.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:m="using:SourceGit.Models"
             xmlns:vm="using:SourceGit.ViewModels"
             xmlns:v="using:SourceGit.Views"
             xmlns:c="using:SourceGit.Converters"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="SourceGit.Views.DiffView"
             x:DataType="vm:DiffContext">
  <Border BorderThickness="1" BorderBrush="{DynamicResource Brush.Border2}" Background="{DynamicResource Brush.Window}">
    <Grid RowDefinitions="26,*">
      <!-- Toolbar -->
      <Border Grid.Row="0" BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border2}">
        <Grid ColumnDefinitions="Auto,*,Auto">
          <StackPanel Grid.Column="0" Orientation="Horizontal" IsVisible="{Binding IsOrgFilePathVisible}" VerticalAlignment="Center">
            <Path Width="12" Height="12" Data="{StaticResource Icons.File}" Margin="8,0,0,0"/>
            <TextBlock Classes="monospace" Margin="4,0,0,0" Text="{Binding OrgFilePath, Converter={x:Static c:PathConverters.TruncateIfTooLong}}" FontSize="11"/>
            <TextBlock Margin="8,0,0,0" Text="→"/>
          </StackPanel>

          <StackPanel Grid.Column="1" Orientation="Horizontal" VerticalAlignment="Center">
            <Path Width="12" Height="12" Data="{StaticResource Icons.File}" Margin="8,0,0,0"/>
            <TextBlock Classes="monospace" Margin="4,0,0,0" Text="{Binding FilePath, Converter={x:Static c:PathConverters.TruncateIfTooLong}}" FontSize="11"/>
            <Path Classes="rotating" Width="10" Height="10" Margin="8,0" Data="{DynamicResource Icons.Loading}" IsVisible="{Binding IsLoading}"/>
          </StackPanel>

          <StackPanel Grid.Column="2" Margin="32,0,0,0" Orientation="Horizontal" IsVisible="{Binding IsTextDiff}" VerticalAlignment="Center">
            <ToggleButton Classes="line_path"
                          Width="32" Height="18"
                          Background="Transparent"
                          Padding="9,6"
                          IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSyntaxHighlighting, Mode=TwoWay}"
                          ToolTip.Tip="{DynamicResource Text.Diff.SyntaxHighlight}">
              <Path Width="13" Height="13" Data="{StaticResource Icons.SyntaxHighlight}" Margin="0,3,0,0"/>
            </ToggleButton>

            <ToggleButton Classes="line_path"
                          Width="32" Height="18"
                          Background="Transparent"
                          Padding="9,6"
                          IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=TwoWay}"
                          ToolTip.Tip="{DynamicResource Text.Diff.SideBySide}">
              <Path Width="12" Height="12" Data="{StaticResource Icons.SideBySide}" Margin="0,2,0,0"/>
            </ToggleButton>
            
            <Button Classes="icon_button" Width="32" Command="{Binding OpenExternalMergeTool}" ToolTip.Tip="{DynamicResource Text.Diff.UseMerger}">
              <Path Width="12" Height="12" Stretch="Uniform" Data="{StaticResource Icons.OpenWith}"/>
            </Button>
          </StackPanel>
        </Grid>
      </Border>

      <!-- Same Page -->
      <Border Grid.Row="1" Background="{DynamicResource Brush.Window}" IsVisible="{Binding IsNoChange}">
        <StackPanel Orientation="Vertical" VerticalAlignment="Center">
          <Path Width="64" Height="64" Data="{StaticResource Icons.Check}" Fill="{DynamicResource Brush.FG2}"/>
          <TextBlock Margin="0,16,0,0"
                     Text="{DynamicResource Text.Diff.NoChange}"
                     FontSize="18" FontWeight="Bold"
                     Foreground="{DynamicResource Brush.FG2}"
                     HorizontalAlignment="Center"/>
        </StackPanel>
      </Border>

      <!-- Diff Contents -->
      <ContentControl Grid.Row="1" Content="{Binding Content}">
        <ContentControl.DataTemplates>
          <!-- Binary Diff -->
          <DataTemplate DataType="m:BinaryDiff">
            <StackPanel Orientation="Vertical" VerticalAlignment="Center">
              <TextBlock Text="{DynamicResource Text.Diff.Binary}"
                         Margin="0,0,0,32"
                         FontSize="18" FontWeight="Bold"
                         Foreground="{DynamicResource Brush.FG2}"
                         HorizontalAlignment="Center"/>
              <Path Width="64" Height="64" Data="{StaticResource Icons.Binary}" Fill="{DynamicResource Brush.FG2}"/>
              <Grid Margin="0,16,0,0" HorizontalAlignment="Center" RowDefinitions="32,32" ColumnDefinitions="Auto,Auto,Auto">
                <Border Grid.Row="0" Grid.Column="0" Height="16" Background="{DynamicResource Brush.Badge}" CornerRadius="8" VerticalAlignment="Center">
                  <TextBlock Classes="monospace" Text="{DynamicResource Text.Diff.Binary.Old}" Margin="8,0" FontSize="10"/>
                </Border>

                <TextBlock Grid.Row="0" Grid.Column="1" Classes="monospace" Text="{Binding OldSize}" Foreground="{DynamicResource Brush.FG2}" HorizontalAlignment="Right" FontSize="16" Margin="8,0"/>
                <TextBlock Grid.Row="0" Grid.Column="2" Classes="monospace" Text="{DynamicResource Text.Bytes}" Foreground="{DynamicResource Brush.FG2}" FontSize="16"/>

                <Border Grid.Row="1" Grid.Column="0" Height="16" Background="Green" CornerRadius="8" VerticalAlignment="Center">
                  <TextBlock Classes="monospace" Text="{DynamicResource Text.Diff.Binary.New}" Margin="8,0" FontSize="10"/>
                </Border>

                <TextBlock Grid.Row="1" Grid.Column="1" Classes="monospace" Text="{Binding NewSize}" Foreground="{DynamicResource Brush.FG2}" HorizontalAlignment="Right" FontSize="16" Margin="8,0"/>
                <TextBlock Grid.Row="1" Grid.Column="2" Classes="monospace" Text="{DynamicResource Text.Bytes}" Foreground="{DynamicResource Brush.FG2}" FontSize="16"/>
              </Grid>
            </StackPanel>
          </DataTemplate>

          <!-- LFS Diff -->
          <DataTemplate DataType="m:LFSDiff">
            <StackPanel Orientation="Vertical" VerticalAlignment="Center">
              <TextBlock Text="{DynamicResource Text.Diff.LFS}"
                         Margin="0,0,0,32"
                         FontSize="18" FontWeight="Bold"
                         Foreground="{DynamicResource Brush.FG2}"
                         HorizontalAlignment="Center"/>
              <Path Width="64" Height="64" Data="{StaticResource Icons.LFS}" Fill="{DynamicResource Brush.FG2}"/>
              <Grid Margin="0,16,0,0" HorizontalAlignment="Center" RowDefinitions="32,32" ColumnDefinitions="Auto,Auto,Auto">
                <Border Grid.Row="0" Grid.Column="0" Height="16" Background="{DynamicResource Brush.Badge}" CornerRadius="8" VerticalAlignment="Center">
                  <TextBlock Classes="monospace" Text="{DynamicResource Text.Diff.Binary.Old}" Margin="8,0" FontSize="10"/>
                </Border>

                <TextBlock Grid.Row="0" Grid.Column="1" Classes="monospace" Text="{Binding Old.Size}" Foreground="{DynamicResource Brush.FG2}" HorizontalAlignment="Right" FontSize="16" Margin="8,0"/>
                <TextBlock Grid.Row="0" Grid.Column="2" Classes="monospace" Text="{DynamicResource Text.Bytes}" Foreground="{DynamicResource Brush.FG2}" FontSize="16"/>

                <Border Grid.Row="1" Grid.Column="0" Height="16" Background="Green" CornerRadius="8" VerticalAlignment="Center">
                  <TextBlock Classes="monospace" Text="{DynamicResource Text.Diff.Binary.New}" Margin="8,0" FontSize="10"/>
                </Border>

                <TextBlock Grid.Row="1" Grid.Column="1" Classes="monospace" Text="{Binding New.Size}" Foreground="{DynamicResource Brush.FG2}" HorizontalAlignment="Right" FontSize="16" Margin="8,0"/>
                <TextBlock Grid.Row="1" Grid.Column="2" Classes="monospace" Text="{DynamicResource Text.Bytes}" Foreground="{DynamicResource Brush.FG2}" FontSize="16"/>
              </Grid>
            </StackPanel>
          </DataTemplate>

          <!-- Text Diff -->
          <DataTemplate DataType="m:TextDiff">
            <v:TextDiffView TextDiff="{Binding}" UseSideBySideDiff="{Binding Source={x:Static vm:Preference.Instance}, Path=UseSideBySideDiff, Mode=OneWay}"/>
          </DataTemplate>
        </ContentControl.DataTemplates>
      </ContentControl>
    </Grid>
  </Border>
</UserControl>