feature: add Open File command palette to quick open repo's file with default editor

Signed-off-by: leo <longshuang@msn.cn>

src/Resources/Locales/en_US.axaml

@@ -542,6 +542,7 @@
   <x:String x:Key="Text.Open" xml:space="preserve">Open</x:String>
   <x:String x:Key="Text.Open.SystemDefaultEditor" xml:space="preserve">Default Editor (System)</x:String>
   <x:String x:Key="Text.OpenAppDataDir" xml:space="preserve">Open Data Storage Directory</x:String>
+  <x:String x:Key="Text.OpenFile" xml:space="preserve">Open File</x:String>
   <x:String x:Key="Text.OpenInExternalMergeTool" xml:space="preserve">Open in Merge Tool</x:String>
   <x:String x:Key="Text.Optional" xml:space="preserve">Optional.</x:String>
   <x:String x:Key="Text.PageTabBar.New" xml:space="preserve">Create New Tab</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -546,6 +546,7 @@
   <x:String x:Key="Text.Open" xml:space="preserve">打开</x:String>
   <x:String x:Key="Text.Open.SystemDefaultEditor" xml:space="preserve">系统默认编辑器</x:String>
   <x:String x:Key="Text.OpenAppDataDir" xml:space="preserve">浏览应用数据目录</x:String>
+  <x:String x:Key="Text.OpenFile" xml:space="preserve">打开文件</x:String>
   <x:String x:Key="Text.OpenInExternalMergeTool" xml:space="preserve">使用外部对比工具查看</x:String>
   <x:String x:Key="Text.Optional" xml:space="preserve">选填。</x:String>
   <x:String x:Key="Text.PageTabBar.New" xml:space="preserve">新建空白页</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -546,6 +546,7 @@
   <x:String x:Key="Text.Open" xml:space="preserve">開啟</x:String>
   <x:String x:Key="Text.Open.SystemDefaultEditor" xml:space="preserve">系統預設編輯器</x:String>
   <x:String x:Key="Text.OpenAppDataDir" xml:space="preserve">瀏覽程式資料目錄</x:String>
+  <x:String x:Key="Text.OpenFile" xml:space="preserve">開啟檔案</x:String>
   <x:String x:Key="Text.OpenInExternalMergeTool" xml:space="preserve">使用外部比對工具檢視</x:String>
   <x:String x:Key="Text.Optional" xml:space="preserve">選填。</x:String>
   <x:String x:Key="Text.PageTabBar.New" xml:space="preserve">新增分頁</x:String>

src/ViewModels/OpenFileCommandPalette.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Avalonia.Threading;
+
+namespace SourceGit.ViewModels
+{
+    public class OpenFileCommandPalette : ICommandPalette
+    {
+        public bool IsLoading
+        {
+            get => _isLoading;
+            private set => SetProperty(ref _isLoading, value);
+        }
+
+        public List<string> VisibleFiles
+        {
+            get => _visibleFiles;
+            private set => SetProperty(ref _visibleFiles, value);
+        }
+
+        public string Filter
+        {
+            get => _filter;
+            set
+            {
+                if (SetProperty(ref _filter, value))
+                    UpdateVisible();
+            }
+        }
+
+        public string SelectedFile
+        {
+            get => _selectedFile;
+            set => SetProperty(ref _selectedFile, value);
+        }
+
+        public OpenFileCommandPalette(Launcher launcher, string repo)
+        {
+            _launcher = launcher;
+            _repo = repo;
+            _isLoading = true;
+
+            Task.Run(async () =>
+            {
+                var files = await new Commands.QueryRevisionFileNames(_repo, "HEAD")
+                    .GetResultAsync()
+                    .ConfigureAwait(false);
+
+                Dispatcher.UIThread.Post(() =>
+                {
+                    IsLoading = false;
+                    _repoFiles = files;
+                    UpdateVisible();
+                });
+            });
+        }
+
+        public override void Cleanup()
+        {
+            _launcher = null;
+            _repo = null;
+            _repoFiles.Clear();
+            _filter = null;
+            _visibleFiles.Clear();
+            _selectedFile = null;
+        }
+
+        public void ClearFilter()
+        {
+            Filter = string.Empty;
+        }
+
+        public void Launch()
+        {
+            if (!string.IsNullOrEmpty(_selectedFile))
+                Native.OS.OpenWithDefaultEditor(Native.OS.GetAbsPath(_repo, _selectedFile));
+
+            _launcher.CancelCommandPalette();
+        }
+
+        private void UpdateVisible()
+        {
+            if (_repoFiles is { Count: > 0 })
+            {
+                if (string.IsNullOrEmpty(_filter))
+                {
+                    VisibleFiles = _repoFiles;
+                }
+                else
+                {
+                    var visible = new List<string>();
+                    foreach (var f in _repoFiles)
+                    {
+                        if (f.Contains(_filter, StringComparison.OrdinalIgnoreCase))
+                            visible.Add(f);
+                    }
+                    VisibleFiles = visible;
+                }
+            }
+        }
+
+        private Launcher _launcher = null;
+        private string _repo = null;
+        private bool _isLoading = false;
+        private List<string> _repoFiles = null;
+        private string _filter = string.Empty;
+        private List<string> _visibleFiles = [];
+        private string _selectedFile = null;
+    }
+}

src/ViewModels/RepositoryCommandPalette.cs

@@ -45,6 +45,12 @@ namespace SourceGit.ViewModels
             _launcher = launcher;
             _repo = repo;
 
+            _cmds.Add(new("OpenFile", () =>
+            {
+                var sub = new OpenFileCommandPalette(_launcher, _repo.FullPath);
+                _launcher.OpenCommandPalette(sub);
+            }));
+
             _cmds.Add(new("FileHistory", () =>
             {
                 var sub = new FileHistoryCommandPalette(_launcher, _repo.FullPath);

src/Views/OpenFileCommandPalette.axaml

@@ -0,0 +1,115 @@
+<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: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.OpenFileCommandPalette"
+             x:DataType="vm:OpenFileCommandPalette">
+  <Grid RowDefinitions="Auto,Auto">
+    <v:RepositoryCommandPaletteTextBox Grid.Row="0"
+                                       x:Name="FilterTextBox"
+                                       Height="24"
+                                       Margin="4,8,4,0"
+                                       BorderThickness="1"
+                                       CornerRadius="12"
+                                       Text="{Binding Filter, Mode=TwoWay}"
+                                       BorderBrush="{DynamicResource Brush.Border2}"
+                                       VerticalContentAlignment="Center">
+      <TextBox.InnerLeftContent>
+        <StackPanel Orientation="Horizontal">
+          <Path Width="14" Height="14"
+                Margin="6,0,0,0"
+                Fill="{DynamicResource Brush.FG2}"
+                Data="{StaticResource Icons.Search}"/>
+          <Border BorderThickness="0"
+                  Background="{DynamicResource Brush.Badge}"
+                  Height="18"
+                  CornerRadius="4"
+                  Margin="4,0,0,0" Padding="4,0">
+            <TextBlock Text="{DynamicResource Text.OpenFile}"
+                       Foreground="Black"
+                       FontWeight="Bold"/>
+          </Border>
+        </StackPanel>
+      </TextBox.InnerLeftContent>
+
+      <TextBox.InnerRightContent>
+        <Button Classes="icon_button"
+                Width="16"
+                Margin="0,0,6,0"
+                Command="{Binding ClearFilter}"
+                IsVisible="{Binding Filter, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"
+                HorizontalAlignment="Right">
+          <Path Width="14" Height="14"
+                Margin="0,1,0,0"
+                Fill="{DynamicResource Brush.FG1}"
+                Data="{StaticResource Icons.Clear}"/>
+        </Button>
+      </TextBox.InnerRightContent>
+    </v:RepositoryCommandPaletteTextBox>
+
+    <ListBox Grid.Row="1"
+             x:Name="FileListBox"
+             MaxHeight="250"
+             Margin="4,8,4,0"
+             BorderThickness="0"
+             SelectionMode="Single"
+             Background="Transparent"
+             Focusable="True"
+             ScrollViewer.HorizontalScrollBarVisibility="Disabled"
+             ScrollViewer.VerticalScrollBarVisibility="Auto"
+             ItemsSource="{Binding VisibleFiles, Mode=OneWay}"
+             SelectedItem="{Binding SelectedFile, Mode=TwoWay}"
+             IsVisible="{Binding VisibleFiles, Converter={x:Static c:ListConverters.IsNotNullOrEmpty}}">
+      <ListBox.Styles>
+        <Style Selector="ListBoxItem">
+          <Setter Property="Padding" Value="8,0"/>
+          <Setter Property="MinHeight" Value="26"/>
+          <Setter Property="CornerRadius" Value="4"/>
+        </Style>
+
+        <Style Selector="ListBox">
+          <Setter Property="FocusAdorner">
+            <FocusAdornerTemplate>
+              <Grid/>
+            </FocusAdornerTemplate>
+          </Setter>
+        </Style>
+      </ListBox.Styles>
+
+      <ListBox.ItemsPanel>
+        <ItemsPanelTemplate>
+          <VirtualizingStackPanel Orientation="Vertical"/>
+        </ItemsPanelTemplate>
+      </ListBox.ItemsPanel>
+
+      <ListBox.ItemTemplate>
+        <DataTemplate DataType="x:String">
+          <Grid ColumnDefinitions="Auto,*" Background="Transparent" Tapped="OnItemTapped">
+            <Path Grid.Column="0"
+                  Width="12" Height="12"
+                  Data="{StaticResource Icons.File}"
+                  IsHitTestVisible="False"/>
+            <TextBlock Grid.Column="1"
+                       Margin="4,0,0,0"
+                       VerticalAlignment="Center"
+                       IsHitTestVisible="False">
+              <Run Text="{Binding Converter={x:Static c:PathConverters.PureFileName}, Mode=OneWay}"/>
+              <Run Text=" "/>
+              <Run Text="{Binding Converter={x:Static c:PathConverters.PureDirectoryName}, Mode=OneWay}" Foreground="{DynamicResource Brush.FG2}"/>
+            </TextBlock>
+          </Grid>
+        </DataTemplate>
+      </ListBox.ItemTemplate>
+    </ListBox>
+
+    <v:LoadingIcon Grid.Row="1"
+                   Width="48" Height="48"
+                   Margin="0,12,0,8"
+                   HorizontalAlignment="Center" VerticalAlignment="Center"
+                   IsVisible="{Binding IsLoading}"/>
+  </Grid>
+</UserControl>

src/Views/OpenFileCommandPalette.axaml.cs

@@ -0,0 +1,66 @@
+using Avalonia.Controls;
+using Avalonia.Input;
+
+namespace SourceGit.Views
+{
+    public partial class OpenFileCommandPalette : UserControl
+    {
+        public OpenFileCommandPalette()
+        {
+            InitializeComponent();
+        }
+
+        protected override void OnKeyDown(KeyEventArgs e)
+        {
+            base.OnKeyDown(e);
+
+            if (DataContext is not ViewModels.OpenFileCommandPalette vm)
+                return;
+
+            if (e.Key == Key.Enter)
+            {
+                vm.Launch();
+                e.Handled = true;
+            }
+            else if (e.Key == Key.Up)
+            {
+                if (FileListBox.IsKeyboardFocusWithin)
+                {
+                    FilterTextBox.Focus(NavigationMethod.Directional);
+                    e.Handled = true;
+                    return;
+                }
+            }
+            else if (e.Key == Key.Down || e.Key == Key.Tab)
+            {
+                if (FilterTextBox.IsKeyboardFocusWithin)
+                {
+                    if (vm.VisibleFiles.Count > 0)
+                    {
+                        FileListBox.Focus(NavigationMethod.Directional);
+                        vm.SelectedFile = vm.VisibleFiles[0];
+                    }
+
+                    e.Handled = true;
+                    return;
+                }
+
+                if (FileListBox.IsKeyboardFocusWithin && e.Key == Key.Tab)
+                {
+                    FilterTextBox.Focus(NavigationMethod.Directional);
+                    e.Handled = true;
+                    return;
+                }
+            }
+        }
+
+        private void OnItemTapped(object sender, TappedEventArgs e)
+        {
+            if (DataContext is ViewModels.OpenFileCommandPalette vm)
+            {
+                vm.Launch();
+                e.Handled = true;
+            }
+        }
+    }
+}