/*******************************************************************************
 * 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;
  }  
}