feature: add context menu Save As Patch... for selected stash (#1018)

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

src/Commands/SaveChangesAsPatch.cs

@@ -37,6 +37,19 @@ namespace SourceGit.Commands
             return true;
         }
 
+        public static bool ProcessStashChanges(string repo, List<Models.DiffOption> opts, string saveTo)
+        {
+            using (var sw = File.Create(saveTo))
+            {
+                foreach (var opt in opts)
+                {
+                    if (!ProcessSingleChange(repo, opt, sw))
+                        return false;
+                }
+            }
+            return true;
+        }
+
         private static bool ProcessSingleChange(string repo, Models.DiffOption opt, FileStream writer)
         {
             var starter = new ProcessStartInfo();

src/Resources/Locales/en_US.axaml

@@ -669,6 +669,7 @@
   <x:String x:Key="Text.StashCM.Apply" xml:space="preserve">Apply</x:String>
   <x:String x:Key="Text.StashCM.Drop" xml:space="preserve">Drop</x:String>
   <x:String x:Key="Text.StashCM.Pop" xml:space="preserve">Pop</x:String>
+  <x:String x:Key="Text.StashCM.SaveAsPatch" xml:space="preserve">Save as Patch...</x:String>
   <x:String x:Key="Text.StashDropConfirm" xml:space="preserve">Drop Stash</x:String>
   <x:String x:Key="Text.StashDropConfirm.Label" xml:space="preserve">Drop:</x:String>
   <x:String x:Key="Text.Stashes" xml:space="preserve">STASHES</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -673,6 +673,7 @@
   <x:String x:Key="Text.StashCM.Apply" xml:space="preserve">应用(apply)</x:String>
   <x:String x:Key="Text.StashCM.Drop" xml:space="preserve">删除(drop)</x:String>
   <x:String x:Key="Text.StashCM.Pop" xml:space="preserve">应用并删除(pop)</x:String>
+  <x:String x:Key="Text.StashCM.SaveAsPatch" xml:space="preserve">另存为补丁...</x:String>
   <x:String x:Key="Text.StashDropConfirm" xml:space="preserve">丢弃贮藏确认</x:String>
   <x:String x:Key="Text.StashDropConfirm.Label" xml:space="preserve">丢弃贮藏 ：</x:String>
   <x:String x:Key="Text.Stashes" xml:space="preserve">贮藏列表</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -672,6 +672,7 @@
   <x:String x:Key="Text.StashCM.Apply" xml:space="preserve">套用 (apply)</x:String>
   <x:String x:Key="Text.StashCM.Drop" xml:space="preserve">刪除 (drop)</x:String>
   <x:String x:Key="Text.StashCM.Pop" xml:space="preserve">套用並刪除 (pop)</x:String>
+  <x:String x:Key="Text.StashCM.SaveAsPatch" xml:space="preserve">另存為修補檔 (patch)...</x:String>
   <x:String x:Key="Text.StashDropConfirm" xml:space="preserve">捨棄擱置變更確認</x:String>
   <x:String x:Key="Text.StashDropConfirm.Label" xml:space="preserve">捨棄擱置變更:</x:String>
   <x:String x:Key="Text.Stashes" xml:space="preserve">擱置變更</x:String>

src/ViewModels/StashesPage.cs

@@ -4,6 +4,7 @@ using System.IO;
 using System.Threading.Tasks;
 
 using Avalonia.Controls;
+using Avalonia.Platform.Storage;
 using Avalonia.Threading;
 
 using CommunityToolkit.Mvvm.ComponentModel;
@@ -157,9 +158,45 @@ namespace SourceGit.ViewModels
                 ev.Handled = true;
             };
 
+            var patch = new MenuItem();
+            patch.Header = App.Text("StashCM.SaveAsPatch");
+            patch.Icon = App.CreateMenuIcon("Icons.Diff");
+            patch.Click += async (_, e) =>
+            {
+                var storageProvider = App.GetStorageProvider();
+                if (storageProvider == null)
+                    return;
+
+                var options = new FilePickerSaveOptions();
+                options.Title = App.Text("StashCM.SaveAsPatch");
+                options.DefaultExtension = ".patch";
+                options.FileTypeChoices = [new FilePickerFileType("Patch File") { Patterns = ["*.patch"] }];
+
+                var storageFile = await storageProvider.SaveFilePickerAsync(options);
+                if (storageFile != null)
+                {
+                    var opts = new List<Models.DiffOption>();
+                    foreach (var c in _changes)
+                    {
+                        if (_untrackedChanges.Contains(c.Path))
+                            opts.Add(new Models.DiffOption("4b825dc642cb6eb9a060e54bf8d69288fbee4904", _selectedStash.Parents[2], c));
+                        else
+                            opts.Add(new Models.DiffOption(_selectedStash.Parents[0], _selectedStash.SHA, c));
+                    }
+
+                    var succ = await Task.Run(() => Commands.SaveChangesAsPatch.ProcessStashChanges(_repo.FullPath, opts, storageFile.Path.LocalPath));
+                    if (succ)
+                        App.SendNotification(_repo.FullPath, App.Text("SaveAsPatchSuccess"));
+                }
+
+                e.Handled = true;
+            };
+
             var menu = new ContextMenu();
             menu.Items.Add(apply);
             menu.Items.Add(drop);
+            menu.Items.Add(new MenuItem { Header = "-" });
+            menu.Items.Add(patch);
             return menu;
         }