Add Git Gutter WIP

src/SharpIDE.Godot/Features/CodeEditor/SharpIdeCodeEdit.cs

@@ -94,6 +94,7 @@ public partial class SharpIdeCodeEdit : CodeEdit
 		LinesEditedFrom += OnLinesEditedFrom;
 		GlobalEvents.Instance.SolutionAltered.Subscribe(OnSolutionAltered);
 		SetCodeRegionTags("#region", "#endregion");
+		//AddGitGutter();
 	}
 
 	private readonly CancellationSeries _solutionAlteredCancellationTokenSeries = new();

src/SharpIDE.Godot/Features/CodeEditor/SharpIdeCodeEdit_GitGutter.cs

@@ -0,0 +1,42 @@
+using Godot;
+using SharpIDE.Application.Features.SolutionDiscovery.VsPersistence;
+using SharpIDE.Godot.Features.Git;
+
+namespace SharpIDE.Godot.Features.CodeEditor;
+
+public partial class SharpIdeCodeEdit
+{
+	private int _gitGutterId;
+    
+    private void AddGitGutter()
+    {
+        AddGutter(-1);
+        var gutterId = GetGutterCount() - 1;
+        SetGutterType(gutterId, GutterType.Custom);
+        SetGutterCustomDraw(gutterId, new Callable(this, MethodName.GitGutterCustomDraw));
+        SetGutterDraw(gutterId, true);
+        SetGutterWidth(gutterId, 9);
+        SetGutterClickable(gutterId, true);
+        GutterClicked += OnGutterClicked;
+        _gitGutterId = gutterId;
+    }
+    
+    private void OnGutterClicked(long line, long gutterId)
+    {
+        if (gutterId != _gitGutterId) return;
+        GD.Print($"Git gutter clicked at line {line}");
+    }
+
+    private void GitGutterCustomDraw(int lineIndex, int gutterIndex, Rect2 rect)
+    {
+        var gitChangeType = GitLineStatus.Added;
+        var color = GitColours.GetColorForGitLineStatus(gitChangeType);
+		
+        var mousePos = GetLocalMousePosition();
+        var isHovered = rect.HasPoint(mousePos);
+        var width = isHovered ? 9 : 6;
+        var drawRect = new Rect2(new Vector2(rect.End.X - width, rect.Position.Y), new Vector2(width, rect.Size.Y)
+        );
+        DrawRect(drawRect, color);
+    }
+}