feature: add context menu items to revision changes to reset (checkout) selected file to this revision or to it's first parent file version (#359)

Author: love-linger

src/Resources/Locales/en_US.axaml

@@ -64,6 +64,8 @@
   <x:String x:Key="Text.BranchCompare" xml:space="preserve">Branch Compare</x:String>
   <x:String x:Key="Text.Bytes" xml:space="preserve">Bytes</x:String>
   <x:String x:Key="Text.Cancel" xml:space="preserve">CANCEL</x:String>
+  <x:String x:Key="Text.ChangeCM.CheckoutThisRevision" xml:space="preserve">Reset to This Revision</x:String>
+  <x:String x:Key="Text.ChangeCM.CheckoutFirstParentRevision" xml:space="preserve">Reset to Parent Revision</x:String>
   <x:String x:Key="Text.ChangeDisplayMode" xml:space="preserve">CHANGE DISPLAY MODE</x:String>
   <x:String x:Key="Text.ChangeDisplayMode.Grid" xml:space="preserve">Show as File and Dir List</x:String>
   <x:String x:Key="Text.ChangeDisplayMode.List" xml:space="preserve">Show as Path List</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -67,6 +67,8 @@
   <x:String x:Key="Text.BranchCompare" xml:space="preserve">分支比较</x:String>
   <x:String x:Key="Text.Bytes" xml:space="preserve">字节</x:String>
   <x:String x:Key="Text.Cancel" xml:space="preserve">取    消</x:String>
+  <x:String x:Key="Text.ChangeCM.CheckoutThisRevision" xml:space="preserve">重置文件到该版本</x:String>
+  <x:String x:Key="Text.ChangeCM.CheckoutFirstParentRevision" xml:space="preserve">重置文件到上一版本</x:String>
   <x:String x:Key="Text.ChangeDisplayMode" xml:space="preserve">切换变更显示模式</x:String>
   <x:String x:Key="Text.ChangeDisplayMode.Grid" xml:space="preserve">文件名+路径列表模式</x:String>
   <x:String x:Key="Text.ChangeDisplayMode.List" xml:space="preserve">全路径列表模式</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -67,6 +67,8 @@
   <x:String x:Key="Text.BranchCompare" xml:space="preserve">分支比較</x:String>
   <x:String x:Key="Text.Bytes" xml:space="preserve">位元組</x:String>
   <x:String x:Key="Text.Cancel" xml:space="preserve">取    消</x:String>
+  <x:String x:Key="Text.ChangeCM.CheckoutThisRevision" xml:space="preserve">重置檔案到該版本</x:String>
+  <x:String x:Key="Text.ChangeCM.CheckoutFirstParentRevision" xml:space="preserve">重置檔案到上一版本</x:String>
   <x:String x:Key="Text.ChangeDisplayMode" xml:space="preserve">切換變更顯示模式</x:String>
   <x:String x:Key="Text.ChangeDisplayMode.Grid" xml:space="preserve">檔名+路徑列表模式</x:String>
   <x:String x:Key="Text.ChangeDisplayMode.List" xml:space="preserve">全路徑列表模式</x:String>

src/ViewModels/CommitDetail.cs

@@ -260,6 +260,33 @@ public ContextMenu CreateChangeContextMenu(Models.Change change)
                 ev.Handled = true;
             };
             menu.Items.Add(diffWithMerger);
+            menu.Items.Add(new MenuItem { Header = "-" });
+
+            if (File.Exists(Path.Combine(_repo.FullPath, change.Path)))
+            {
+                var resetToThisRevision = new MenuItem();
+                resetToThisRevision.Header = App.Text("ChangeCM.CheckoutThisRevision");
+                resetToThisRevision.Icon = App.CreateMenuIcon("Icons.Undo");
+                resetToThisRevision.Click += (_, ev) =>
+                {
+                    new Commands.Checkout(_repo.FullPath).FileWithRevision(change.Path, $"{_commit.SHA}");
+                    ev.Handled = true;
+                };
+
+                var resetToFirstParent = new MenuItem();
+                resetToFirstParent.Header = App.Text("ChangeCM.CheckoutFirstParentRevision");
+                resetToFirstParent.Icon = App.CreateMenuIcon("Icons.Undo");
+                resetToFirstParent.IsEnabled = _commit.Parents.Count > 0 && change.Index != Models.ChangeState.Added;
+                resetToFirstParent.Click += (_, ev) =>
+                {
+                    new Commands.Checkout(_repo.FullPath).FileWithRevision(change.Path, $"{_commit.SHA}~1");
+                    ev.Handled = true;
+                };
+
+                menu.Items.Add(resetToThisRevision);
+                menu.Items.Add(resetToFirstParent);
+                menu.Items.Add(new MenuItem { Header = "-" });
+            }
 
             if (change.Index != Models.ChangeState.Deleted)
             {
@@ -294,7 +321,6 @@ public ContextMenu CreateChangeContextMenu(Models.Change change)
                     ev.Handled = true;
                 };
 
-                menu.Items.Add(new MenuItem { Header = "-" });
                 menu.Items.Add(history);
                 menu.Items.Add(blame);
                 menu.Items.Add(explore);