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.ade.postupload.client.ui;
029
030import com.google.gwt.user.client.ui.FlowPanel;
031
032/**
033 * Allows using an 'a' element as a GWT panel.
034 */
035public class CmsPreviewLink extends FlowPanel {
036
037    /**
038     * Creates a new instance.
039     */
040    public CmsPreviewLink() {
041
042        super("a");
043    }
044
045    /**
046     * Sets the link URL.
047     *
048     * @param href the link URL
049     */
050    public void setHref(String href) {
051
052        setAttr("href", href);
053    }
054
055    /**
056     * Sets the 'target' attribute of the link.
057     *
058     * @param target the new value for the 'target' attribute
059     */
060    public void setTarget(String target) {
061
062        setAttr("target", target);
063    }
064
065    /**
066     * Helper method for setting/clearing an element attribute.
067     *
068     * <p>If the given value is null, the attribute is cleared, otherwise it is set to that value.
069     *
070     * @param name the attribute name
071     * @param value the attribute value
072     */
073    private void setAttr(String name, String value) {
074
075        if (value != null) {
076            getElement().setAttribute(name, value);
077        } else {
078            getElement().removeAttribute(name);
079        }
080    }
081
082}