Fixed forum-9168: ArgumentOutOfRangeException in BooFormattingStrategy.SearchBracketForward/GapTextBufferStrategy.GetCharAt.

Fixed forum-9200: ArgumentException in ShowErrorHelpCommand.Run/IHxTopicList.ItemAt.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3878 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/Boo/BooBinding/Project/Src/FormattingStrategy.cs

@@ -185,13 +185,12 @@ namespace Grunwald.BooBinding
 		
 		bool IsMultilineString(IDocument document, int offset)
 		{
-			try {
-				if ((document.GetCharAt(offset) == document.GetCharAt(offset + 1))
-				    && (document.GetCharAt(offset) == document.GetCharAt(offset + 2))) {
-					return true;
-				}
-			} catch (Exception) {
+			if (offset + 2 >= document.TextLength)
 				return false;
+			
+			if ((document.GetCharAt(offset) == document.GetCharAt(offset + 1))
+			    && (document.GetCharAt(offset) == document.GetCharAt(offset + 2))) {
+				return true;
 			}
 			
 			return false;
@@ -228,17 +227,18 @@ namespace Grunwald.BooBinding
 						switch (ch) {
 							case '/':
 								if (!inMultiString && !inSingleString) {
-									if (document.GetCharAt(offset + 1) == '*') {
-										multiCommentLevel++;
-									}
-									if (document.GetCharAt(offset + 1) == '/') {
-										inSingleComment = true;
+									if (offset + 1 < document.TextLength) {
+										if (document.GetCharAt(offset + 1) == '*') {
+											multiCommentLevel++;
+										} else if (document.GetCharAt(offset + 1) == '/') {
+											inSingleComment = true;
+										}
 									}
 								}
 								break;
 							case '*':
 								if (!inMultiString && !inSingleString) {
-									if (document.GetCharAt(offset + 1) == '/') {
+									if (offset + 1 < document.TextLength && document.GetCharAt(offset + 1) == '/') {
 										multiCommentLevel--;
 									}
 								}

src/AddIns/Misc/HtmlHelp2/Project/src/Commands/ShowErrorHelpCommand.cs

@@ -55,7 +55,11 @@ namespace HtmlHelp2.Commands
 						MessageService.ShowErrorFormatted("No help available for {0}!", code);
 						return;
 					}
-					topic = list.ItemAt(1);
+					try {
+						topic = list.ItemAt(1);
+					} catch (ArgumentException) {
+						topic = null;
+					}
 					if (topic == null) {
 						MessageService.ShowErrorFormatted("No help available for {0}!", code);
 						return;