refactor: rewrite OpenAI integration

- use `OpenAI` and `Azure.AI.OpenAI`
- use `developer` role instead of `system` for OpenAI's `o1` series models
- use streaming response
- re-design `AIAssistant`

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

src/Views/AIAssistant.axaml.cs

@@ -3,26 +3,112 @@ using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 
+using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Interactivity;
+using Avalonia.Media;
 using Avalonia.Threading;
 
+using AvaloniaEdit.Document;
+using AvaloniaEdit.Editing;
+using AvaloniaEdit.TextMate;
+using AvaloniaEdit;
+
 namespace SourceGit.Views
 {
+    public class AIResponseView : TextEditor
+    {
+        protected override Type StyleKeyOverride => typeof(TextEditor);
+
+        public AIResponseView() : base(new TextArea(), new TextDocument())
+        {
+            IsReadOnly = true;
+            ShowLineNumbers = false;
+            WordWrap = true;
+            HorizontalScrollBarVisibility = ScrollBarVisibility.Disabled;
+            VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
+
+            TextArea.TextView.Margin = new Thickness(4, 0);
+            TextArea.TextView.Options.EnableHyperlinks = false;
+            TextArea.TextView.Options.EnableEmailHyperlinks = false;
+        }
+
+        protected override void OnLoaded(RoutedEventArgs e)
+        {
+            base.OnLoaded(e);
+
+            TextArea.TextView.ContextRequested += OnTextViewContextRequested;
+
+            if (_textMate == null)
+            {
+                _textMate = Models.TextMateHelper.CreateForEditor(this);
+                Models.TextMateHelper.SetGrammarByFileName(_textMate, "README.md");
+            }
+        }
+
+        protected override void OnUnloaded(RoutedEventArgs e)
+        {
+            base.OnUnloaded(e);
+
+            TextArea.TextView.ContextRequested -= OnTextViewContextRequested;
+
+            if (_textMate != null)
+            {
+                _textMate.Dispose();
+                _textMate = null;
+            }
+
+            GC.Collect();
+        }
+
+        private void OnTextViewContextRequested(object sender, ContextRequestedEventArgs e)
+        {
+            var selected = SelectedText;
+            if (string.IsNullOrEmpty(selected))
+                return;
+
+            var copy = new MenuItem() { Header = App.Text("Copy") };
+            copy.Click += (_, ev) =>
+            {
+                App.CopyText(selected);
+                ev.Handled = true;
+            };
+
+            if (this.FindResource("Icons.Copy") is Geometry geo)
+            {
+                copy.Icon = new Avalonia.Controls.Shapes.Path()
+                {
+                    Width = 10,
+                    Height = 10,
+                    Stretch = Stretch.Uniform,
+                    Data = geo,
+                };
+            }
+
+            var menu = new ContextMenu();
+            menu.Items.Add(copy);
+            menu.Open(TextArea.TextView);
+
+            e.Handled = true;
+        }
+
+        private TextMate.Installation _textMate = null;
+    }
+
     public partial class AIAssistant : ChromelessWindow
     {
         public AIAssistant()
         {
-            _cancel = new CancellationTokenSource();
             InitializeComponent();
         }
 
-        public AIAssistant(Models.OpenAIService service, string repo, List<Models.Change> changes, Action<string> onDone)
+        public AIAssistant(Models.OpenAIService service, string repo, ViewModels.WorkingCopy wc, List<Models.Change> changes)
         {
             _service = service;
             _repo = repo;
+            _wc = wc;
             _changes = changes;
-            _onDone = onDone;
-            _cancel = new CancellationTokenSource();
 
             InitializeComponent();
         }
@@ -30,39 +116,63 @@ namespace SourceGit.Views
         protected override void OnOpened(EventArgs e)
         {
             base.OnOpened(e);
-
-            if (string.IsNullOrEmpty(_repo))
-                return;
-
-            Task.Run(() =>
-            {
-                var message = new Commands.GenerateCommitMessage(_service, _repo, _changes, _cancel.Token, SetDescription).Result();
-                if (_cancel.IsCancellationRequested)
-                    return;
-
-                Dispatcher.UIThread.Invoke(() =>
-                {
-                    _onDone?.Invoke(message);
-                    Close();
-                });
-            }, _cancel.Token);
+            Generate();
         }
 
         protected override void OnClosing(WindowClosingEventArgs e)
         {
             base.OnClosing(e);
-            _cancel.Cancel();
+            _cancel?.Cancel();
         }
 
-        private void SetDescription(string message)
+        private void OnGenerateCommitMessage(object sender, RoutedEventArgs e)
         {
-            Dispatcher.UIThread.Invoke(() => ProgressMessage.Text = message);
+            if (_wc != null)
+                _wc.CommitMessage = TxtResponse.Text;
+
+            Close();
+        }
+
+        private void OnRegen(object sender, RoutedEventArgs e)
+        {
+            TxtResponse.Text = string.Empty;
+            Generate();
+            e.Handled = true;
+        }
+
+        private void Generate()
+        {
+            if (_repo == null)
+                return;
+
+            IconInProgress.IsVisible = true;
+            BtnGenerateCommitMessage.IsEnabled = false;
+            BtnRegenerate.IsEnabled = false;
+
+            _cancel = new CancellationTokenSource();
+            Task.Run(() =>
+            {
+                new Commands.GenerateCommitMessage(_service, _repo, _changes, _cancel.Token, message =>
+                {
+                    Dispatcher.UIThread.Invoke(() => TxtResponse.Text = message);
+                }).Exec();
+
+                if (!_cancel.IsCancellationRequested)
+                {
+                    Dispatcher.UIThread.Invoke(() =>
+                    {
+                        IconInProgress.IsVisible = false;
+                        BtnGenerateCommitMessage.IsEnabled = true;
+                        BtnRegenerate.IsEnabled = true;
+                    });
+                }
+            }, _cancel.Token);
         }
 
         private Models.OpenAIService _service;
         private string _repo;
+        private ViewModels.WorkingCopy _wc;
         private List<Models.Change> _changes;
-        private Action<string> _onDone;
         private CancellationTokenSource _cancel;
     }
 }