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
private IJavaElement fRememberedElement;
	
	private ITextSelection fRememberedSelection;
	
	private int fRememberedElementOffset;
	
	private BracketInserter fBracketInserter= new BracketInserter();
	
	
	private GenerateActionGroup fGenerateActionGroup;
	private CompositeActionGroup fContextMenuGroup;
	
	/**
	 * Creates a new compilation unit editor.
	 */
	public CompilationUnitEditor() {
		super();
		setDocumentProvider(JavaPlugin.getDefault().getCompilationUnitDocumentProvider());
		setEditorContextMenuId("#CompilationUnitEditorContext"); 
		setRulerContextMenuId("#CompilationUnitRulerContext"); 
		setOutlinerContextMenuId("#CompilationUnitOutlinerContext"); 
		
		fSavePolicy= null;
			
		fJavaEditorErrorTickUpdater= new JavaEditorErrorTickUpdater(this);
	}
	
	/*
	 * @see AbstractTextEditor#createActions()