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
*/
				public IInformationControlCreator getInformationPresenterControlCreator() {
					return fControlCreator;
				}
			}
			ISourceViewer sourceViewer= getSourceViewer();
			if (sourceViewer == null) {	
				fTextOperationAction.run();
				return;
			}
				
			if (sourceViewer instanceof ITextViewerExtension4)  {
				ITextViewerExtension4 extension4= (ITextViewerExtension4) sourceViewer;
				if (extension4.moveFocusToWidgetToken())
					return;
			}
			
			if (! (sourceViewer instanceof ITextViewerExtension2)) {
				fTextOperationAction.run();
				return;
			}
				
			ITextViewerExtension2 textViewerExtension2= (ITextViewerExtension2) sourceViewer;
			
			
			ITextHover textHover= textViewerExtension2.getCurrentTextHover();
			if (textHover == null) {
				fTextOperationAction.run();
				return;				
			}