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.dialogs.history.diff;
029
030import org.opencms.file.CmsObject;
031import org.opencms.file.history.CmsHistoryResourceHandler;
032import org.opencms.gwt.shared.CmsHistoryResourceBean;
033import org.opencms.main.OpenCms;
034import org.opencms.ui.A_CmsUI;
035import org.opencms.ui.CmsVaadinUtils;
036import org.opencms.ui.Messages;
037import org.opencms.ui.dialogs.history.CmsHistoryRow;
038import org.opencms.workplace.comparison.CmsHistoryListUtil;
039
040import com.google.common.base.Optional;
041import com.vaadin.ui.Alignment;
042import com.vaadin.ui.Button;
043import com.vaadin.ui.Button.ClickEvent;
044import com.vaadin.ui.Button.ClickListener;
045import com.vaadin.ui.Component;
046import com.vaadin.v7.ui.HorizontalLayout;
047import com.vaadin.ui.Panel;
048import com.vaadin.v7.ui.VerticalLayout;
049import com.vaadin.ui.themes.ValoTheme;
050
051/**
052 * Provides buttons for showing the two versions being compared.<p>
053 *
054 */
055public class CmsShowVersionButtons implements I_CmsDiffProvider {
056
057    /**
058     * Creates a 'show version' button.<p>
059     *
060     * @param cms the CMS context to use
061     * @param version the version
062     *
063     * @return the new button
064     */
065    public Button createButton(final CmsObject cms, final CmsHistoryResourceBean version) {
066
067        String label = CmsVaadinUtils.getMessageText(
068            Messages.GUI_HISTORY_DIALOG_SHOW_VERSION_BUTTON_1,
069            CmsHistoryRow.formatVersion(version));
070        Button result = new Button(label);
071        result.addClickListener(new ClickListener() {
072
073            private static final long serialVersionUID = 1L;
074
075            public void buttonClick(ClickEvent event) {
076
077                String v1Param = version.getVersion().getVersionNumber() != null
078                ? "" + version.getVersion().getVersionNumber()
079                : "" + CmsHistoryResourceHandler.PROJECT_OFFLINE_VERSION;
080                String link = CmsHistoryListUtil.getHistoryLink(cms, version.getStructureId(), v1Param);
081                link = OpenCms.getLinkManager().substituteLinkForUnknownTarget(cms, link);
082                A_CmsUI.get().openPageOrWarn(link, "_blank");
083            }
084
085        });
086        return result;
087    }
088
089    /**
090     * @see org.opencms.ui.dialogs.history.diff.I_CmsDiffProvider#diff(org.opencms.file.CmsObject, org.opencms.gwt.shared.CmsHistoryResourceBean, org.opencms.gwt.shared.CmsHistoryResourceBean)
091     */
092    public Optional<Component> diff(CmsObject cms, CmsHistoryResourceBean v1, CmsHistoryResourceBean v2) {
093
094        Panel panel = new Panel("");
095        panel.addStyleName(ValoTheme.PANEL_BORDERLESS);
096        HorizontalLayout hl = new HorizontalLayout();
097        panel.setContent(hl);
098        hl.addComponent(createButton(cms, v1));
099        hl.addComponent(createButton(cms, v2));
100        VerticalLayout outerContainer = new VerticalLayout();
101        outerContainer.addComponent(hl);
102        outerContainer.setComponentAlignment(hl, Alignment.MIDDLE_RIGHT);
103        outerContainer.setMargin(true);
104        hl.setSpacing(true);
105        return Optional.fromNullable((Component)outerContainer);
106    }
107
108}