/*******************************************************************************
 * Copyright (c) 2010 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.jsdt.debug.internal.ui.actions;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.PreferencesUtil;
import org.eclipse.wst.jsdt.debug.core.breakpoints.IJavaScriptBreakpoint;

/**
 * Action that opens the properties page for a {@link IJavaScriptBreakpoint}
 * 
 * @since 1.0
 */
public class BreakpointPropertiesAction implements IObjectActionDelegate {

	IJavaScriptBreakpoint breakpoint = null;

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)
	 */
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {}

	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
	 */
	public void run(IAction action) {
		if(this.breakpoint != null) {
			PreferencesUtil.createPropertyDialogOn(
					PlatformUI.getWorkbench().getDisplay().getActiveShell(), 
					this.breakpoint, 
					null, 
					null, 
					null).open();
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
		if (selection instanceof IStructuredSelection) {
			IStructuredSelection ss= (IStructuredSelection)selection;
			if (ss.isEmpty() || ss.size() > 1) {
				return;
			}
			Object element= ss.getFirstElement();
			if (element instanceof IJavaScriptBreakpoint) {
				this.breakpoint = (IJavaScriptBreakpoint) element;
			}
			else {
				this.breakpoint = null;
			}
		}
	}

}