// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

// MoveResourceFileDownAction

//

package com.symbian.smt.gui.smtwidgets.resources;

import java.util.HashMap;

import org.eclipse.jface.viewers.CheckboxTableViewer;

import org.eclipse.jface.viewers.ISelectionProvider;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ListViewer;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.swt.widgets.Button;

import com.symbian.smt.gui.ResourcesEnums;

import com.symbian.smt.gui.smtwidgets.AbstractMultipleEntriesWidgetAction;

/**

 * This is the action that moves a command line option up by one position in the

 * list of assigned options.

 * 

 * @author barbararosi-schwartz

 * 

 */

class MoveResourceFileUpAction extends AbstractMultipleEntriesWidgetAction {

	private CheckboxTableViewer resourceFilesViewer;

	private ListViewer resourceTypesViewer;

	private HashMap<ResourcesEnums, java.util.List<CheckableResourceFilename>> resourceFilesMap;

	/**

	 * The option that has been moved by the user

	 */

	private CheckableResourceFilename movedCheckableFilename = null;

	MoveResourceFileUpAction(

			Button button,

			ISelectionProvider filesViewer,

			HashMap<ResourcesEnums, java.util.List<CheckableResourceFilename>> resourceFilesMap,

			ListViewer resourceTypesViewer) {

		super(filesViewer, "Move Up", button);

		this.resourceFilesViewer = (CheckboxTableViewer) filesViewer;

		this.resourceFilesMap = resourceFilesMap;

		this.resourceTypesViewer = resourceTypesViewer;

		setEnabled(false);

	}

	/**

	 * Returns the CheckableResourceFilename object that was moved by the user.

	 * 

	 * @return the CheckableResourceFilename object that was moved by the user

	 */

	CheckableResourceFilename getMovedCheckableFilename() {

		return movedCheckableFilename;

	}

	/**

	 * Moves the selected CheckableResourceFilename object down by one position

	 * in the model.

	 */

	@Override

	public void run() {

		movedCheckableFilename = (CheckableResourceFilename) ((StructuredSelection) getSelection())

				.getFirstElement();

		java.util.List<CheckableResourceFilename> checkableFilenames = ResourcesWidgetHelper

				.getCheckableResourceFilenames(ResourcesWidgetHelper

						.getSelectedResourceType(resourceTypesViewer),

						resourceFilesMap);

		int oldIndex = checkableFilenames.indexOf(movedCheckableFilename);

		checkableFilenames.remove(oldIndex);

		int newIndex = oldIndex - 1;

		checkableFilenames.add(newIndex, movedCheckableFilename);

	}

	/**

	 * Enabled if the list has exactly one selection and if the selection is not

	 * the first element in the list.

	 */

	@Override

	public void selectionChanged(IStructuredSelection selection) {

		if (selection.size() != 1) {

			setEnabled(false);

			return;

		}

		boolean enabled = true;

		CheckableResourceFilename selectedElement = (CheckableResourceFilename) selection

				.getFirstElement();

		CheckableResourceFilename firstElement = (CheckableResourceFilename) resourceFilesViewer

				.getElementAt(0);

		if (firstElement != null && selectedElement.equals(firstElement)) {

			enabled = false;

		}

		setEnabled(enabled);

	}

}