Bug 43228 Encoding Support for Java editor broken
I20030916 This has been broken with the introduction of ExtendedTextEditor.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
ISourceViewer viewer= getSourceViewer();
			if (viewer == null) {
				deactivate();
				return;
			}
				
			StyledText text= viewer.getTextWidget();
			if (text == null || text.isDisposed()) {
				deactivate();
				return;
			}
				
			if ((event.stateMask & SWT.BUTTON1) != 0 && text.getSelectionCount() != 0) {
				deactivate();
				return;
			}
		
			IRegion region= getCurrentTextRegion(viewer);
			if (region == null || region.getLength() == 0) {
				repairRepresentation();
				return;
			}
			
			highlightRegion(viewer, region);	
			activateCursor(viewer);												
		}
		/*
		 * @see org.eclipse.swt.events.FocusListener#focusGained(org.eclipse.swt.events.FocusEvent)
		 */
		public void focusGained(FocusEvent e) {}