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
int offset= computeOffsetAtLocation(sourceViewer, hoverEventLocation.x, hoverEventLocation.y);
			if (offset == -1) {
				fTextOperationAction.run();
				return;				
			}				
			try {
				
				IDocument document= sourceViewer.getDocument();
				String contentType= document.getContentType(offset);
				final IRegion hoverRegion= textHover.getHoverRegion(sourceViewer, offset);						
				if (hoverRegion == null)
					return;
				
				final String hoverInfo= textHover.getHoverInfo(sourceViewer, hoverRegion);
	
				
				IInformationProvider informationProvider= new IInformationProvider() {
					/*
					 * @see org.eclipse.jface.text.information.IInformationProvider#getSubject(org.eclipse.jface.text.ITextViewer, int)
					 */
					public IRegion getSubject(ITextViewer textViewer, int offset) {					
						return hoverRegion;
					}
					/*
					 * @see org.eclipse.jface.text.information.IInformationProvider#getInformation(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
					 */
					public String getInformation(ITextViewer textViewer, IRegion subject) {
						return hoverInfo;
					}
				};