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.client;
029
030import com.google.gwt.dom.client.Element;
031import com.google.gwt.user.client.ui.FlowPanel;
032import com.google.gwt.user.client.ui.HTML;
033
034/**
035 * Client side widget to display an OpenCms report.<p>
036 */
037public class CmsClientReportWidget extends FlowPanel {
038
039    /** The widget containing the report content HTML. */
040    private HTML m_reportContent = new HTML();
041
042    /**
043     * Creates a new instance.<p>
044     */
045    public CmsClientReportWidget() {
046
047        add(m_reportContent);
048        addStyleName("o-report");
049        m_reportContent.addStyleName("o-report-content");
050    }
051
052    /**
053     * Appends the given HTML to the report content.<p>
054     *
055     * Also scrolls to the bottom of the
056     *
057     * @param html the HTML to append
058     */
059    public void append(String html) {
060
061        if ((html != null) && (html.length() > 0)) {
062            appendHtmlInternal(m_reportContent.getElement(), html);
063            scrollToBottom(getElement(), m_reportContent.getElement());
064        }
065    }
066
067    /**
068     * Appends HTML to the content.<p>
069     *
070     * @param element the report content element
071     * @param html the HTML to append
072     */
073    private native void appendHtmlInternal(Element element, String html) /*-{
074        element.insertAdjacentHTML('beforeend', html);
075    }-*/;
076
077    /**
078     * Scrolls to the bottom.<p>
079     *
080     * @param element the report widget element
081     * @param content the report content element
082     */
083    private native void scrollToBottom(Element element, Element content) /*-{
084
085        element.scrollTop = content.offsetHeight;
086
087    }-*/;
088}