feature<RevisionFiles>: enable to search file in revision files

src/Views/Widgets/RevisionFiles.xaml

@@ -21,8 +21,45 @@
             <ColumnDefinition Width="*"/>
         </Grid.ColumnDefinitions>
 
-        <Border Grid.Column="0" Background="{DynamicResource Brush.Contents}" BorderBrush="{DynamicResource Brush.Border2}" BorderThickness="1">
+        <Grid Grid.Column="0">
-            <controls:Tree x:Name="treeFiles" SelectionChanged="OnFilesSelectionChanged" ContextMenuOpening="OnFilesContextMenuOpening">
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto"/>
+                <RowDefinition Height="*"/>
+            </Grid.RowDefinitions>
+
+            <Grid Grid.Row="0">
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="24"/>
+                    <ColumnDefinition Width="*"/>
+                </Grid.ColumnDefinitions>
+
+                <Border
+                    Grid.Column="0" Grid.ColumnSpan="2"
+                    BorderBrush="{DynamicResource Brush.Border2}"
+                    BorderThickness="1"/>
+                <Path
+                    Grid.Column="0"
+                    Width="14" Height="14"
+                    Fill="{DynamicResource Brush.FG2}"
+                    Data="{StaticResource Icon.Search}"
+                    IsHitTestVisible="False"/>
+                <controls:TextEdit
+                    Grid.Column="1"
+                    Height="24"
+                    Margin="0"
+                    Placeholder="{DynamicResource Text.CommitViewer.Changes.Search}"
+                    BorderThickness="0"
+                    TextChanged="OnSearchFilterChanged"/>
+            </Grid>
+
+            <Border Grid.Row="1" Margin="0,4,0,0" Background="{DynamicResource Brush.Contents}" BorderBrush="{DynamicResource Brush.Border2}" BorderThickness="1">
+                <controls:Tree x:Name="treeFiles" SelectionChanged="OnFilesSelectionChanged">
+                    <controls:Tree.ItemContainerStyle>
+                        <Style TargetType="{x:Type controls:TreeItem}" BasedOn="{StaticResource Style.TreeItem}">
+                            <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}"/>
+                            <EventSetter Event="ContextMenuOpening" Handler="OnFilesContextMenuOpening"/>
+                        </Style>
+                    </controls:Tree.ItemContainerStyle>
                     <controls:Tree.ItemTemplate>
                         <HierarchicalDataTemplate ItemsSource="{Binding Children}">
                             <StackPanel Orientation="Horizontal" Height="24">
@@ -54,6 +91,7 @@
                     </controls:Tree.ItemTemplate>
                 </controls:Tree>
             </Border>
+        </Grid>
 
         <GridSplitter Grid.Column="1" Width="1" HorizontalAlignment="Center" VerticalAlignment="Stretch" Background="Transparent"/>
 

src/Views/Widgets/RevisionFiles.xaml.cs

@@ -18,6 +18,8 @@ namespace SourceGit.Views.Widgets {
         private string repo = null;
         private string sha = null;
         private bool isLFSEnabled = false;
+        private List<Models.Object> cached = new List<Models.Object>();
+        private string filter = null;
 
         /// <summary>
         ///     文件列表树节点
@@ -26,6 +28,7 @@ namespace SourceGit.Views.Widgets {
             public Models.ObjectType Type { get; set; } = Models.ObjectType.None;
             public string Path { get; set; } = "";
             public string SHA { get; set; } = null;
+            public bool IsExpanded { get; set; } = false;
             public bool IsFolder => Type == Models.ObjectType.None;
             public List<FileNode> Children { get; set; } = new List<FileNode>();
         }
@@ -44,10 +47,32 @@ namespace SourceGit.Views.Widgets {
                 var objects = cmd.Result();
                 if (cmd.Ctx.IsCancelRequested) return;
 
+                cached = objects;
+                ShowVisibles();        
+            });
+        }
+
+        public void Cleanup() {
+            treeFiles.ItemsSource = new List<FileNode>();
+            cached = new List<Models.Object>();
+        }
+
+        private void ShowVisibles() {
             var nodes = new List<FileNode>();
             var folders = new Dictionary<string, FileNode>();
+            var visibles = new List<Models.Object>();
 
-                foreach (var obj in objects) {
+            if (string.IsNullOrEmpty(filter)) {
+                visibles.AddRange(cached);
+            } else {
+                foreach (var obj in cached) {
+                    if (obj.Path.ToUpper().Contains(filter)) visibles.Add(obj);
+                }
+            }
+
+            var expanded = visibles.Count <= 50;
+
+            foreach (var obj in visibles) {
                 var sepIdx = obj.Path.IndexOf('/');
                 if (sepIdx == -1) {
                     nodes.Add(new FileNode() {
@@ -68,6 +93,7 @@ namespace SourceGit.Views.Widgets {
                                 Type = Models.ObjectType.None,
                                 Path = folder,
                                 SHA = null,
+                                IsExpanded = expanded,
                             };
                             nodes.Add(lastFolder);
                             folders.Add(folder, lastFolder);
@@ -76,6 +102,7 @@ namespace SourceGit.Views.Widgets {
                                 Type = Models.ObjectType.None,
                                 Path = folder,
                                 SHA = null,
+                                IsExpanded = expanded,
                             };
                             folders.Add(folder, cur);
                             lastFolder.Children.Add(cur);
@@ -92,12 +119,10 @@ namespace SourceGit.Views.Widgets {
                         SHA = obj.SHA,
                     });
                 }
-
-                    obj.Path = null;
             }
 
             folders.Clear();
-                objects.Clear();
+            visibles.Clear();
 
             SortFileNodes(nodes);
 
@@ -105,11 +130,6 @@ namespace SourceGit.Views.Widgets {
                 treeFiles.ItemsSource = nodes;
                 GC.Collect();
             });
-            });
-        }
-
-        public void Cleanup() {
-            treeFiles.ItemsSource = new List<FileNode>();
         }
 
         private void SortFileNodes(List<FileNode> nodes) {
@@ -259,7 +279,7 @@ namespace SourceGit.Views.Widgets {
         }
 
         private void OnFilesContextMenuOpening(object sender, ContextMenuEventArgs e) {
-            var item = treeFiles.FindItem(e.OriginalSource as DependencyObject);
+            var item = sender as Controls.TreeItem;
             if (item == null) return;
 
             var node = item.DataContext as FileNode;
@@ -322,6 +342,13 @@ namespace SourceGit.Views.Widgets {
         private void OnRequestBringIntoView(object sender, RequestBringIntoViewEventArgs e) {
             e.Handled = true;
         }
+
+        private void OnSearchFilterChanged(object sender, TextChangedEventArgs e) {
+            var edit = sender as Controls.TextEdit;
+            filter = edit.Text.ToUpper();
+            Task.Run(() => ShowVisibles());
+            e.Handled = true;
+        }
         #endregion
     }
 }