Bug 6700 Code assist should not just beep
suggest to show a status message: Could not complete due to syntax errors. This is also better for accessability reasons.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
text.removeKeyListener(fBracketHighlighter);
					text.removeMouseListener(fBracketHighlighter);
				}
				
				fSourceViewer= null;
			}
		}
		
		/**
		 * @see KeyListener#keyPressed(KeyEvent)
		 */
		public void keyPressed(KeyEvent e) {
			fTextChanged= false;
		}
		/**
		 * @see KeyListener#keyReleased(KeyEvent)
		 */
		public void keyReleased(KeyEvent e) {
			if (!fTextChanged)
				fHighlightBrackets.run();
		}
		/**
		 * @see MouseListener#mouseDoubleClick(MouseEvent)
		 */
		public void mouseDoubleClick(MouseEvent e) {
		}
		
		/**
		 * @see MouseListener#mouseDown(MouseEvent)
		 */