Bug 21047 code formatter availability inconsistent
Sometimes the hotkey (ctrl-shift-f) and the menu entry for formatting the source code are disabled, while the entry in the context menu is enabled and works as expected. I didn't find any patterns on when this occurs till now.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
String p= event.getProperty();
		boolean affects=MATCHING_BRACKETS_COLOR.equals(p) || CURRENT_LINE_COLOR.equals(p) || 
									ERROR_INDICATION_COLOR.equals(p) || WARNING_INDICATION_COLOR.equals(p) || TASK_INDICATION_COLOR.equals(p);
		return affects ? affects : super.affectsTextPresentation(event);
	}
	
	/*
	 * @see JavaEditor#createJavaSourceViewer(Composite, IVerticalRuler, int)
	 */
	protected ISourceViewer createJavaSourceViewer(Composite parent, IVerticalRuler ruler, int styles) {
		return new AdaptedSourceViewer(parent, ruler, styles);
	}
	
	/*
	 * @see JavaEditor#synchronizeOutlinePageSelection()
	 */
	public void synchronizeOutlinePageSelection() {
		
		if (isEditingScriptRunning())
			return;
		
		ISourceViewer sourceViewer= getSourceViewer();
		if (sourceViewer == null || fOutlinePage == null)
			return;
			
		StyledText styledText= sourceViewer.getTextWidget();
		if (styledText == null)
			return;
		
		int modelCaret= 0;