/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.pi.button;

import java.util.Iterator;

import org.eclipse.core.resources.IFile;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.runtime.IAdaptable;

import org.eclipse.jface.action.IAction;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.ui.IEditorPart;

import org.eclipse.ui.IObjectActionDelegate;

import org.eclipse.ui.IWorkbenchPart;

import org.eclipse.ui.PartInitException;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.ide.IDE;

import org.eclipse.ui.ide.ResourceUtil;

import com.nokia.carbide.cpp.pi.editors.PIPageEditor;

import com.nokia.carbide.cpp.pi.util.GeneralMessages;

public class BupMapSwitchAction implements IObjectActionDelegate {

	// IDs defined in plugin.xml

	public static final String BUP_MAP_SWITCH_POP_UP_ID = ButtonPlugin.PLUGIN_ID + ".BupMapSwitchAction"; //$NON-NLS-1$

	// private members

	private ISelection selection;

	/* (non-Javadoc)

	 * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)

	 */

	public void setActivePart(IAction arg0, IWorkbenchPart arg1) {

	}

	/* (non-Javadoc)

	 * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)

	 */

	public void run(IAction arg0) {

		if (arg0.getId().equals(BUP_MAP_SWITCH_POP_UP_ID)){

			handleBupMapSwitch();

		}

	}

	private void handleBupMapSwitch() {

		if (selection != null && selection instanceof IStructuredSelection) {

			Iterator iter = ((IStructuredSelection)selection).iterator();

			while (iter.hasNext()) {

				Object selectedItem = iter.next();

				IResource selectedResource = getResourceFromObject(selectedItem);

				if (selectedResource != null && selectedResource instanceof IFile) {

					IEditorPart selectedEditorPart = ResourceUtil.findEditor(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(), (IFile) selectedResource);

					if (selectedEditorPart != null) {

						if (selectedEditorPart instanceof PIPageEditor) {

							// found an opened editor instance

							PIPageEditor selectedPIPageEditor = (PIPageEditor) selectedEditorPart;

							PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().activate(selectedPIPageEditor);

							ButtonPlugin.getDefault().switchMap();

						} else {

							GeneralMessages.showErrorMessage(Messages.getString("BupMapSwitchAction.notPIPageeditor")); //$NON-NLS-1$

						}

					} else {

						// NPI file is not opened

						try {

							IDE.openEditor(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(), (IFile) selectedResource);

							// found an opened editor instance

							PIPageEditor selectedPIPageEditor = (PIPageEditor) selectedEditorPart;

							PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().activate(selectedPIPageEditor);

							ButtonPlugin.getDefault().switchMap();

						} catch (PartInitException e) {

						}

					}

				}

			}

		}

	}

	/**

	 * Return the resource associated with an object.

	 * @param element - object in question

	 * @return associated resource if there is one

	 */

	private IResource getResourceFromObject(Object element) {

		if (element instanceof IResource) {

			return (IResource)element;

		} else if (element instanceof IAdaptable) {

			return (IResource)((IAdaptable)element).getAdapter(IResource.class);

		}

		return null;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)

	 */

	public void selectionChanged(IAction arg0, ISelection arg1) {

		this.selection = arg1;

	}

}