Bug 33629 Double-quote as character value broken in RC1
There is a series of related bugs under the category of it's really hard to enter a character value containing a double-quote character and when you try it strange things can happen. 1. Single-quote balancing seems not to work at all. When you type a single quote you get a single quote. 2. When you type the character sequence '" the result is '"" (!) 3. When you try to backspace over the extra unwanted " (either the first or the second) both are erased. The only way to get the desired result seems to be to copy and paste the " character. 4. If you try to cut and paste in the ", you can get in some weird mode where the editor thinks a string exists where there is none. I'm still trying to figure out the sequence that produced the following lines: if (c == ''' || c == '"') {" + "} (Leading tabs removed for sake of example.) I only know that the last two " characters were not typed. No doubt another illustration why editor modes are a bad idea.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
fInformationPresenter.setOffset(offset);	
				fInformationPresenter.setInformationProvider(informationProvider, contentType);
				fInformationPresenter.showInformation();
			} catch (BadLocationException e) {				
			}
		}
		
		private int computeOffsetAtLocation(ITextViewer textViewer, int x, int y) {
			
			StyledText styledText= textViewer.getTextWidget();
			IDocument document= textViewer.getDocument();
			
			if (document == null)
				return -1;		
			try {
				int widgetLocation= styledText.getOffsetAtLocation(new Point(x, y));
				if (textViewer instanceof ITextViewerExtension3) {
					ITextViewerExtension3 extension= (ITextViewerExtension3) textViewer;
					return extension.widgetOffset2ModelOffset(widgetLocation);
				} else {
					IRegion visibleRegion= textViewer.getVisibleRegion();
					return widgetLocation + visibleRegion.getOffset();
				}
			} catch (IllegalArgumentException e) {
				return -1;	
			}
		}
	};
	
	static protected class AnnotationAccess implements IAnnotationAccess {