Merge pull request #65 from hemnstill/dev2master

Added extension point and make some methods are virtual

Author: dgrunwald

ICSharpCode.AvalonEdit/Rendering/BackgroundGeometryBuilder.cs

@@ -244,7 +244,7 @@ static IEnumerable<Rect> ProcessTextLines(TextView textView, VisualLine visualLi
 						continue;
 					if (segmentStartVCInLine == visualStartCol && i > 0 && segmentStartVC < segmentStartVCInLine && visualLine.TextLines[i - 1].TrailingWhitespaceLength == 0)
 						continue;
-					yield return new Rect(pos, y, 1, line.Height);
+					yield return new Rect(pos, y, textView.EmptyLineSelectionWidth, line.Height);
 				} else {
 					Rect lastRect = Rect.Empty;
 					if (segmentStartVCInLine <= visualEndCol) {

ICSharpCode.AvalonEdit/Rendering/TextView.cs

@@ -1619,7 +1619,7 @@ Rect IScrollInfo.MakeVisible(Visual visual, Rect rectangle)
 		/// <summary>
 		/// Scrolls the text view so that the specified rectangle gets visible.
 		/// </summary>
-		public void MakeVisible(Rect rectangle)
+		public virtual void MakeVisible(Rect rectangle)
 		{
 			Rect visibleRectangle = new Rect(scrollOffset.X, scrollOffset.Y,
 			                                 scrollViewport.Width, scrollViewport.Height);
@@ -2104,5 +2104,13 @@ public int HighlightedLine {
 			get { return this.currentLineHighlighRenderer.Line; }
 			set { this.currentLineHighlighRenderer.Line = value; }
 		}
+
+		/// <summary>
+		/// Empty line selection width.
+		/// </summary>
+		public virtual double EmptyLineSelectionWidth
+		{
+			get { return 1; }
+		}
 	}
 }

ICSharpCode.AvalonEdit/Rendering/VisualLineLinkText.cs

@@ -74,7 +74,7 @@ public override TextRun CreateTextRun(int startVisualColumn, ITextRunConstructio
 		/// </summary>
 		/// <remarks>Returns true when control is pressed; or when
 		/// <see cref="RequireControlModifierForClick"/> is disabled.</remarks>
-		protected bool LinkIsClickable()
+		protected virtual bool LinkIsClickable()
 		{
 			if (NavigateUri == null)
 				return false;