feature: select the cursor line by triple-click (#927)

Signed-off-by: leo <[email protected]>

Author: love-linger

src/Views/CommitMessagePresenter.cs

@@ -172,18 +172,18 @@ protected override void OnPointerMoved(PointerEventArgs e)
 
         protected override void OnPointerPressed(PointerPressedEventArgs e)
         {
+            var point = e.GetCurrentPoint(this);
+
             if (_lastHover != null)
             {
+                var link = _lastHover.Link;
                 e.Pointer.Capture(null);
 
                 if (_lastHover.IsCommitSHA)
                 {
                     var parentView = this.FindAncestorOfType<CommitBaseInfo>();
                     if (parentView is { DataContext: ViewModels.CommitDetail detail })
                     {
-                        var point = e.GetCurrentPoint(this);
-                        var link = _lastHover.Link;
-
                         if (point.Properties.IsLeftButtonPressed)
                         {
                             detail.NavigateTo(_lastHover.Link);
@@ -217,9 +217,6 @@ protected override void OnPointerPressed(PointerPressedEventArgs e)
                 }
                 else
                 {
-                    var point = e.GetCurrentPoint(this);
-                    var link = _lastHover.Link;
-
                     if (point.Properties.IsLeftButtonPressed)
                     {
                         Native.OS.OpenBrowser(link);
@@ -255,6 +252,49 @@ protected override void OnPointerPressed(PointerPressedEventArgs e)
                 return;
             }
 
+            if (point.Properties.IsLeftButtonPressed && e.ClickCount == 3)
+            {
+                var text = Inlines?.Text;
+                if (string.IsNullOrEmpty(text))
+                {
+                    e.Handled = true;
+                    return;
+                }
+
+                var position = e.GetPosition(this) - new Point(Padding.Left, Padding.Top);
+                var x = Math.Min(Math.Max(position.X, 0), Math.Max(TextLayout.WidthIncludingTrailingWhitespace, 0));
+                var y = Math.Min(Math.Max(position.Y, 0), Math.Max(TextLayout.Height, 0));
+                position = new Point(x, y);
+
+                var textPos = TextLayout.HitTestPoint(position).TextPosition;
+                var lineStart = 0;
+                var lineEnd = text.IndexOf('\n', lineStart);
+                if (lineEnd <= 0)
+                {
+                    lineEnd = text.Length;
+                }
+                else
+                {
+                    while (lineEnd < textPos)
+                    {
+                        lineStart = lineEnd + 1;
+                        lineEnd = text.IndexOf('\n', lineStart);
+                        if (lineEnd == -1)
+                        {
+                            lineEnd = text.Length;
+                            break;
+                        }
+                    }
+                }
+
+                SetCurrentValue(SelectionStartProperty, lineStart);
+                SetCurrentValue(SelectionEndProperty, lineEnd);
+
+                e.Pointer.Capture(this);
+                e.Handled = true;
+                return;
+            }
+
             base.OnPointerPressed(e);
         }