[Debugger] BezierPathPreview and UI/NSBezierPath converters

2 files changed, 174 insertions, 1 deletions

diff --git a/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/BezierPathPreviewVisualizer.cs b/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/BezierPathPreviewVisualizer.cs
new file mode 100644
index 0000000000..9a9c809b39
--- /dev/null
+++ b/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/BezierPathPreviewVisualizer.cs
@@ -0,0 +1,173 @@
+//
+// BezierPathPreviewVisualizer.cs
+//
+// Author:
+//       David Karlaš <david.karlas@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin, Inc (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using Mono.Debugging.Client;
+using Xwt.Drawing;
+using MonoDevelop.Components;
+using Gtk;
+using System.Collections.Generic;
+using MonoDevelop.Debugger.Converters;
+
+namespace MonoDevelop.Debugger.PreviewVisualizers
+{
+	public class BezierPathPreviewVisualizer : PreviewVisualizer
+	{
+		#region implemented abstract members of PreviewVisualizer
+
+		public override bool CanVisualize (ObjectValue val)
+		{
+			return DebuggingService.HasGetConverter<List<BezierPathElement>> (val);
+		}
+
+		public override Control GetVisualizerWidget (ObjectValue val)
+		{
+			var elements = DebuggingService.GetGetConverter<List<BezierPathElement>> (val).GetValue (val);
+			if (elements == null) {
+				//This happens on older mono runtimes which don't support outArgs
+				//Returning null means it will fallback to GenericPreview
+				return null;
+			}
+			var bezierPathWidget = new BezierPathWidget (new Gdk.Size (300, 300), elements);
+			bezierPathWidget.Show ();
+			return bezierPathWidget;
+		}
+
+		#endregion
+	}
+
+	class BezierPathWidget : Gtk.DrawingArea
+	{
+		List<BezierPathElement> elements;
+		Gdk.Size size;
+
+		public BezierPathWidget (Gdk.Size size, List<BezierPathElement> elements)
+		{
+			this.elements = elements;
+			this.size = size;
+		}
+
+		protected override bool OnExposeEvent (Gdk.EventExpose evnt)
+		{
+			using (var ctx = Gdk.CairoHelper.Create (GdkWindow)) {
+				foreach (var element in elements) {
+					switch (element.ElementType) {
+					case BezierPathElementType.MoveTo:
+						ctx.MoveTo (element.Point1.X, element.Point1.Y);
+						break;
+					case BezierPathElementType.LineTo:
+						ctx.LineTo (element.Point1.X, element.Point1.Y);
+						break;
+					case BezierPathElementType.ClosePath:
+						ctx.ClosePath ();
+						break;
+					case BezierPathElementType.CurveTo:
+						ctx.CurveTo (
+							element.Point1.X, element.Point1.Y,
+							element.Point2.X, element.Point2.Y,
+							element.Point3.X, element.Point3.Y);
+						break;
+					}
+				}
+
+				//Scale down if it's bigger then size
+				var ext = ctx.StrokeExtents ();
+				double scaleRatio = 1;
+				if (ext.Width > size.Width || ext.Height > size.Height) {
+					scaleRatio = Math.Min (
+						ext.Width < 1 ? 1 : size.Width / ext.Width,
+						ext.Height < 1 ? 1 : size.Height / ext.Height);
+					ctx.Scale (scaleRatio, scaleRatio);
+				}
+
+				//Center object
+				double targetX = (size.Width - ext.Width * scaleRatio) / 2;
+				double targetY = (size.Height - ext.Height * scaleRatio) / 2;
+				ctx.Translate (targetX - ext.X, targetY - ext.Y);
+
+				ctx.NewPath ();
+				foreach (var element in elements) {
+					switch (element.ElementType) {
+					case BezierPathElementType.MoveTo:
+						ctx.MoveTo (element.Point1.X, element.Point1.Y);
+						break;
+					case BezierPathElementType.LineTo:
+						ctx.LineTo (element.Point1.X, element.Point1.Y);
+						break;
+					case BezierPathElementType.ClosePath:
+						ctx.ClosePath ();
+						break;
+					case BezierPathElementType.CurveTo:
+						ctx.CurveTo (
+							element.Point1.X, element.Point1.Y,
+							element.Point2.X, element.Point2.Y,
+							element.Point3.X, element.Point3.Y);
+						break;
+					}
+				}
+
+
+				ctx.NewPath ();
+				foreach (var element in elements) {
+					switch (element.ElementType) {
+					case BezierPathElementType.MoveTo:
+						ctx.MoveTo (element.Point1.X, element.Point1.Y);
+						break;
+					case BezierPathElementType.LineTo:
+						ctx.LineTo (element.Point1.X, element.Point1.Y);
+						break;
+					case BezierPathElementType.ClosePath:
+						ctx.ClosePath ();
+						break;
+					case BezierPathElementType.CurveTo:
+						ctx.CurveTo (
+							element.Point1.X, element.Point1.Y,
+							element.Point2.X, element.Point2.Y,
+							element.Point3.X, element.Point3.Y);
+						break;
+					}
+				}
+
+				ctx.SetSourceRGB (219 / 256.0, 229 / 256.0, 242 / 256.0);
+				ctx.FillPreserve ();
+				ctx.SetSourceRGB (74 / 256.0, 144 / 256.0, 226 / 256.0);
+				//ctx.Antialias = Cairo.Antialias.None;
+				ctx.LineWidth = 1;
+				ctx.Stroke ();
+			}
+			return true;
+		}
+
+		protected override void OnSizeRequested (ref Gtk.Requisition requisition)
+		{
+			requisition = new Requisition () {
+				Width = size.Width,
+				Height = size.Height
+			};
+		}
+
+	}
+}
+
diff --git a/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/LocationPreviewVisualizer.cs b/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/LocationPreviewVisualizer.cs
index c31bb74260..e31e0457b3 100644
--- a/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/LocationPreviewVisualizer.cs
+++ b/main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.PreviewVisualizers/LocationPreviewVisualizer.cs
@@ -53,7 +53,7 @@ namespace MonoDevelop.Debugger.PreviewVisualizers
 			mainBox.PackStart (new Label (GettextCatalog.GetString ("Loading...")));
 			using (var stream = new MemoryStream ()) {
 				var cancelSource = new CancellationTokenSource ();
-				var timer = new Timer (delegate {
+				new Timer (delegate {
 					cancelSource.Cancel ();
 				}, null, 4000, System.Threading.Timeout.Infinite);
 				WebRequestHelper.GetResponseAsync (