Bug 53010 Editor preferences do not take effect on open editors
I-20040224 Go to the Java > Editor > Syntax preference page. Change the keyword color to red. Press Ok. At this point, we use to see the preview update. Not on this build (problem #1). Press Ok, and close the pref dialog. The java editor that was already open did not update. I had to close it and reopen it for the colors to take effect (problem #2)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
if (action != null)
					action.run();
			}
		}
		/*
		 * @see org.eclipse.swt.events.MouseMoveListener#mouseMove(org.eclipse.swt.events.MouseEvent)
		 */
		public void mouseMove(MouseEvent event) {
			
			if (event.widget instanceof Control && !((Control) event.widget).isFocusControl()) {
				deactivate();
				return;
			}
			
			if (!fActive) {
				if (event.stateMask != fKeyModifierMask)
					return;
				
				fActive= true;
			}
	
			ISourceViewer viewer= getSourceViewer();
			if (viewer == null) {
				deactivate();
				return;
			}
				
			StyledText text= viewer.getTextWidget();
			if (text == null || text.isDisposed()) {
				deactivate();