Bug 55451 Assertion Failed in ASTProvider
plugin export 20040319 1. Browse into CVS of org.eclipse.swt (win32), and open TableItem.java 2. Endless repretitions of error dialogs org.eclipse.jface.text.Assert$AssertionFailedException: Assertion failed: at java.lang.Throwable.<init>(Throwable.java) at java.lang.Throwable.<init>(Throwable.java) at org.eclipse.jface.text.Assert$AssertionFailedException.<init>(Assert.java:54) at org.eclipse.jface.text.Assert.isTrue(Assert.java:175) at org.eclipse.jface.text.Assert.isTrue(Assert.java) at org.eclipse.jdt.internal.ui.javaeditor.ASTProvider.getAST(ASTProvider.java:140) at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup.calculateASTandInform(SelectionListenerWithASTManager.java) at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$1.run(SelectionListenerWithASTManager.java:97) at org.eclipse.core.internal.jobs.Worker.run(Worker.java)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/viewsupport/SelectionListenerWithASTManager.java
protected void doSelectionChanged(IWorkbenchPart part, ISelection selection) {
			if (part instanceof IEditorPart && selection instanceof ITextSelection) { 
				PartListenerGroup listenerGroup= (PartListenerGroup) fPartListeners.get(part);
				if (listenerGroup != null) {
					listenerGroup.fireSelectionChanged((ITextSelection) selection);
				}
			}
		}	
	}
	
	private Map fListenerGroups;
	
	private SelectionListenerWithASTManager() {
		fListenerGroups= new HashMap();
	}
	
	/**
	 * Registers a selection listener for the given editor part. 
	 * @param part The editor part to listen to.
	 * @param listener The listener to register.
	 */
	public void addListener(IEditorPart part, ISelectionListenerWithAST listener) {
		ISelectionService service= part.getSite().getWorkbenchWindow().getSelectionService();
		WorkbenchWindowListener windowListener= (WorkbenchWindowListener) fListenerGroups.get(service);
		if (windowListener == null) {
			windowListener= new WorkbenchWindowListener(service);
			fListenerGroups.put(service, windowListener);
		}
		windowListener.install(part, listener);