EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.editor.view.media.handler;

import org.apache.log4j.Logger;

import org.eclipse.core.commands.AbstractHandler;

import org.eclipse.core.commands.ExecutionEvent;

import org.eclipse.core.commands.ExecutionException;

import org.eclipse.core.commands.common.NotDefinedException;

import org.eclipse.core.commands.operations.IUndoableOperation;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.TreePath;

import org.eclipse.jface.viewers.TreeSelection;

import org.eclipse.ui.IEditorInput;

import org.eclipse.ui.IEditorPart;

import org.eclipse.ui.IWorkbenchPart;

import org.eclipse.ui.forms.editor.FormEditor;

import org.eclipse.ui.handlers.HandlerUtil;

import eu.etaxonomy.cdm.model.description.DescriptionBase;

import eu.etaxonomy.cdm.model.media.Media;

import eu.etaxonomy.cdm.model.taxon.Taxon;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;

import eu.etaxonomy.taxeditor.editor.view.descriptive.handler.CreateDescriptionElementHandler;

import eu.etaxonomy.taxeditor.operations.AbstractPostOperation;

import eu.etaxonomy.taxeditor.operations.IPostOperationEnabled;

import eu.etaxonomy.taxeditor.operations.MoveMediaInListOperation;

/**

 * <p>MoveImageUpInListHandler class.</p>

 *

 * @author p.ciardelli

 * @created 11.08.2009

 * @version 1.0

 */

public class MoveImageUpInListHandler extends AbstractHandler {

	private static final Logger logger = Logger

			.getLogger(CreateDescriptionElementHandler.class);

	/* (non-Javadoc)

	 * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)

	 */

	/** {@inheritDoc} */

	public Object execute(ExecutionEvent event) throws ExecutionException {

		IWorkbenchPart part = HandlerUtil.getActivePart(event);

		IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part : null;

		IEditorPart editor = HandlerUtil.getActiveEditor(event);

		if (editor instanceof FormEditor) {

			editor = ((FormEditor) editor).getActiveEditor();

		}

		IEditorInput input = editor.getEditorInput();

		if (input instanceof TaxonEditorInput) {

			Taxon taxon = ((TaxonEditorInput) input).getTaxon();

			ISelection selection = HandlerUtil.getCurrentSelection(event);

			if (selection instanceof TreeSelection) {

				TreePath[] paths = ((TreeSelection) selection).getPaths();

				int count = paths[0].getSegmentCount();

				DescriptionBase element = null;

				for (int i = 0; i < count; i++ ) {

					if (paths[0].getSegment(i) instanceof DescriptionBase) {

						element = (DescriptionBase) paths[0].getSegment(i);

						break;

					}

				}				

				Media media = (Media) paths[0].getLastSegment();

				AbstractPostOperation operation = null;

				try {

					// TODO use undo context specific to editor

					operation = new MoveMediaInListOperation(event.getCommand().getName(), 

							EditorUtil.getUndoContext(), taxon, element, media, MoveMediaInListOperation.UP, postOperationEnabled);

					EditorUtil.executeOperation(operation);

				} catch (NotDefinedException e) {

					logger.warn("Command name not set");

				}

			}

		} 

		return null;

	}

}