Bug 10550 Hilight cursor row (accessibility for the visually impaired)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
*/
		public void inputDocumentAboutToBeChanged(IDocument oldInput, IDocument newInput) {
			if (oldInput != null) {
				fHighlightBrackets.deactivate(false);
				fManager.uninstall(oldInput);
			}
		}
		
		/**
		 * @see ITextInputListener#inputDocumentChanged(IDocument, IDocument)
		 */
		public void inputDocumentChanged(IDocument oldInput, IDocument newInput) {
			if (newInput != null)
				fManager.install(newInput);
		}
	};
	
	
	class InternalSourceViewer extends SourceViewer {
		
		public InternalSourceViewer(Composite parent, IVerticalRuler ruler, int styles) {
			super(parent, ruler, styles);
		}
		
		public IContentAssistant getContentAssistant() {
			return fContentAssistant;
		}
		
		/*
		 * @see ITextOperationTarget#doOperation(int)