Use UndoGroup to ensure action ended if exception occurs.

Author: nyamatongwe

cocoa/ScintillaCocoa.mm

@@ -1102,11 +1102,12 @@ bool SupportAnimatedFind() {
 		// No data or no flavor we support.
 		return;
 
-	pdoc->BeginUndoAction();
-	ClearSelection(false);
-	InsertPasteShape(selectedText.Data(), selectedText.Length(),
-			 selectedText.rectangular ? PasteShape::rectangular : PasteShape::stream);
-	pdoc->EndUndoAction();
+	{
+		UndoGroup ug(pdoc);
+		ClearSelection(false);
+		InsertPasteShape(selectedText.Data(), selectedText.Length(),
+				 selectedText.rectangular ? PasteShape::rectangular : PasteShape::stream);
+	}
 
 	Redraw();
 	EnsureCaretVisible();

win32/ScintillaWin.cxx

@@ -1167,10 +1167,9 @@ void ScintillaWin::SelectionToHangul() {
 
 		if (converted) {
 			documentStr = StringEncode(uniStr, CodePageOfDocument());
-			pdoc->BeginUndoAction();
+			UndoGroup ug(pdoc);
 			ClearSelection();
 			InsertPaste(&documentStr[0], documentStr.size());
-			pdoc->EndUndoAction();
 		}
 	}
 }