AvalonEdit: Fixed bug in GetIndentation that could mess up text when pressing Enter.

Fixed exception when opening a file for which no syntax highlighting is available.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@3940 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/AvalonEditViewContent.cs

@@ -70,12 +70,14 @@ namespace ICSharpCode.AvalonEdit.AddIn
 		{
 			const string formatingStrategyPath = "/AddIns/DefaultTextEditor/Formatter";
 			
+			if (codeEditor.SyntaxHighlighting != null) {
 				string formatterPath = formatingStrategyPath + "/" + codeEditor.SyntaxHighlighting.Name;
 				var formatter = AddInTree.BuildItems<IFormattingStrategy>(formatterPath, this, false);
 				if (formatter != null && formatter.Count > 0) {
 					codeEditor.FormattingStrategy = formatter[0];
 				}
 			}
+		}
 		
 		protected override void OnFileNameChanged(OpenedFile file)
 		{

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Utils/TextUtilities.cs

@@ -65,9 +65,9 @@ namespace ICSharpCode.AvalonEdit.Utils
 		{
 			if (textSource == null)
 				throw new ArgumentNullException("textSource");
-			int pos = offset;
+			int pos;
-			while (pos < textSource.TextLength) {
+			for (pos = offset; pos < textSource.TextLength; pos++) {
-				char c = textSource.GetCharAt(pos++);
+				char c = textSource.GetCharAt(pos);
 				if (c != ' ' && c != '\t')
 					break;
 			}