/*******************************************************************************
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * Contributors:
 *      Kamesh Sampath - initial implementation
 *      Gregory Amerson - initial implementation review and ongoing maintenance
 *******************************************************************************/

package com.liferay.ide.portlet.core.model.internal;

import com.liferay.ide.portlet.core.model.CustomWindowState;
import com.liferay.ide.portlet.core.model.WindowState;

import org.eclipse.sapphire.Element;
import org.eclipse.sapphire.FilteredListener;
import org.eclipse.sapphire.ImageData;
import org.eclipse.sapphire.ImageService;
import org.eclipse.sapphire.Listener;
import org.eclipse.sapphire.PropertyEvent;

/**
 * @author Kamesh Sampath
 */
public class WindowStateImageService extends ImageService
{

    private static final ImageData IMG_DEFAULT = ImageData.readFromClassLoader(
        WindowStateImageService.class, "images/window_states.png" ).required(); //$NON-NLS-1$

    private static final ImageData IMG_MAXIMIZED = ImageData.readFromClassLoader(
        WindowStateImageService.class, "images/maximize.png" ).required(); //$NON-NLS-1$

    private static final ImageData IMG_MINIMIZED = ImageData.readFromClassLoader(
        WindowStateImageService.class, "images/minimize.png" ).required(); //$NON-NLS-1$

    private Listener listener;

    @Override
    protected void initImageService()
    {
        this.listener = new FilteredListener<PropertyEvent>()
        {

            @Override
            public void handleTypedEvent( final PropertyEvent event )
            {
                refresh();
            }
        };

        context( Element.class ).attach( this.listener, WindowState.PROP_WINDOW_STATE.name() );
    }

    @Override
    protected ImageData compute()
    {
        String strWindowState = null;
        Element element = context( Element.class );
        ImageData imageData = null;

        if( element instanceof CustomWindowState )
        {
            CustomWindowState customWindowState = (CustomWindowState) element;
            strWindowState = String.valueOf( customWindowState.getWindowState().content() );
        }
        else if( element instanceof WindowState )
        {
            WindowState windowState = (WindowState) element;
            strWindowState = windowState.getWindowState().content();
        }

        if( "MAXIMIZED".equalsIgnoreCase( strWindowState ) ) //$NON-NLS-1$
        {
            imageData = IMG_MAXIMIZED;
        }
        else if( "MINIMIZED".equalsIgnoreCase( strWindowState ) ) //$NON-NLS-1$
        {
            imageData = IMG_MINIMIZED;
        }

        if( imageData == null )
        {
            imageData = IMG_DEFAULT;

        }

        return imageData;
    }

    @Override
    public void dispose()
    {
        super.dispose();

        context( Element.class ).detach( this.listener, WindowState.PROP_WINDOW_STATE.name() );
    }

}