001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.ui.editors;
029
030import org.opencms.ui.shared.rpc.I_CmsEditorStateRPC;
031
032import com.vaadin.server.AbstractExtension;
033import com.vaadin.ui.AbstractComponent;
034
035/**
036 * Extension for iFrame embedded editors storing the changed state of the edited content.<p>
037 */
038public class CmsEditorStateExtension extends AbstractExtension implements I_CmsEditorStateRPC {
039
040    /** The serial version id. */
041    private static final long serialVersionUID = -7159723321228453105L;
042
043    /** The changed flag. */
044    private boolean m_hasChanges;
045
046    /**
047     * Constructor.<p>
048     *
049     * @param component the component to extend
050     */
051    public CmsEditorStateExtension(AbstractComponent component) {
052        extend(component);
053        registerRpc(this);
054    }
055
056    /**
057     * Returns whether the editor has content changes.<p>
058     *
059     * @return <code>true</code> in case the editor has content changes
060     */
061    public boolean hasChanges() {
062
063        return m_hasChanges;
064    }
065
066    /**
067     * @see org.opencms.ui.shared.rpc.I_CmsEditorStateRPC#setHasChanges(boolean)
068     */
069    public void setHasChanges(boolean hasChanges) {
070
071        m_hasChanges = hasChanges;
072    }
073}