Fixed SD2-1190: Exception is thrown selecting all text and then cutting/deleting it.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2063 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/ICSharpCode.TextEditor/Project/Src/Document/FoldingStrategy/FoldMarker.cs

@@ -26,11 +26,17 @@ namespace ICSharpCode.TextEditor.Document
 		
 		static void GetPointForOffset(IDocument document, int offset, out int line, out int column)
 		{
-			if (offset < 0) offset = 0;
+			if (offset > document.TextLength) {
-			if (offset >= document.TextLength) offset = document.TextLength - 1;
+				line = document.TotalNumberOfLines + 1;
+				column = 1;
+			} else if (offset < 0) {
+				line = -1;
+				column = -1;
+			} else {
 				line = document.GetLineNumberForOffset(offset);
 				column = offset - document.GetLineSegment(line).Offset;
 			}
+		}
 		
 		public FoldType FoldType {
 			get { return foldType; }

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/FoldMargin.cs

@@ -68,11 +68,13 @@ namespace ICSharpCode.TextEditor
 						g.FillRectangle(BrushRegistry.GetBrush(textArea.Enabled ? lineNumberPainterColor.BackgroundColor : SystemColors.InactiveBorder), markerRectangle);
 					}
 					
-					int currentLine = textArea.Document.GetFirstLogicalLine(textArea.Document.GetVisibleLine(textArea.TextView.FirstVisibleLine) + y);
+					int currentLine = textArea.Document.GetFirstLogicalLine(textArea.TextView.FirstPhysicalLine + y);
+					if (currentLine < textArea.Document.TotalNumberOfLines) {
 						PaintFoldMarker(g, currentLine, markerRectangle);
 					}
 				}
 			}
+		}
 		
 		bool SelectedFoldingFrom(List<FoldMarker> list)
 		{
@@ -155,19 +157,22 @@ namespace ICSharpCode.TextEditor
 			} else {
 				if (isFoldEnd) {
 					int midy = drawingRectangle.Top + drawingRectangle.Height / 2;
+					
+					// draw fold end marker
+					g.DrawLine(BrushRegistry.GetPen(isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
+					           xPos,
+					           midy,
+					           xPos + foldMarkerSize / 2,
+					           midy);
+					
 					// draw line above fold end marker
+					// must be drawn after fold marker because it might have a different color than the fold marker
 					g.DrawLine(BrushRegistry.GetPen(isBetweenSelected || isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
 					           xPos,
 					           drawingRectangle.Top,
 					           xPos,
 					           midy);
 					
-					// draw fold end marker
-					g.DrawLine(BrushRegistry.GetPen(isBetweenSelected || isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
-					           xPos,
-					           midy,
-					           xPos + foldMarkerSize / 2,
-					           midy);
 					// draw line below fold end marker
 					if (isBetween) {
 						g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),