/*******************************************************************************
 * Copyright (c) 2001, 2004 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.xml.ui.internal.wizards;

import java.util.Iterator;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IActionDelegate;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

// TODO cs... rename this class NewXMLActionDelegate
// we need to re-add pre-validation using the validation framework API's
// since we also need to add validation to the 'New XML' case, this
// prevalidation
// function should really go into the NewWizard somewhere
//
public class XMLImportActionDelegate implements IActionDelegate {
	/**
	 * Checks the current selection and runs the separate browser to show the
	 * content of the Readme file. This code shows how to launch separate
	 * browsers that are not VA/Base desktop parts.
	 * 
	 * @param action
	 *            the action that was performed
	 */
	public void run(IAction action) {
		IWorkbenchWindow workbenchWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
		ISelection selection = workbenchWindow.getSelectionService().getSelection();
		Object selectedObject = getSelection(selection);

		if ((selectedObject instanceof IFile) && (selection instanceof IStructuredSelection)) {
			IFile file = (IFile) selectedObject;
			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			try {
				NewXMLWizard.showDialog(workbenchWindow.getShell(), file, structuredSelection);
			}
			catch (Exception e) {
				// XMLCorePlugin.getDefault().getLog().log();
			}
		}
	}

	/**
	 * unused
	 */
	public void selectionChanged(IAction action, ISelection selection) {
		// unused
	}

	// scammed from WindowUtility
	//
	public static Object getSelection(ISelection selection) {
		if (selection == null) {
			return null;
		} // end of if ()

		Object result = null;
		if (selection instanceof IStructuredSelection) {
			IStructuredSelection es = (IStructuredSelection) selection;
			Iterator i = es.iterator();
			if (i.hasNext()) {
				result = i.next();
			}
		}
		return result;
	}
}