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 org.opencms.gwt.client.util.CmsDomUtil;
031import org.opencms.ui.components.CmsRichTextArea;
032
033import com.google.gwt.dom.client.Element;
034import com.google.gwt.dom.client.IFrameElement;
035import com.google.gwt.dom.client.Style;
036import com.vaadin.client.ui.VRichTextArea;
037import com.vaadin.client.ui.richtextarea.RichTextAreaConnector;
038import com.vaadin.shared.ui.Connect;
039import com.vaadin.shared.ui.Connect.LoadStyle;
040
041/**
042 * Special connector for CmsRichTextArea which adds some styles to the iframe body used in the editor.
043 */
044@Connect(value = CmsRichTextArea.class, loadStyle = LoadStyle.LAZY)
045public class CmsRichTextAreaConnector extends RichTextAreaConnector {
046
047    /** Serial version id. */
048    private static final long serialVersionUID = 1L;
049
050    /**
051     * @see com.vaadin.client.ui.AbstractComponentConnector#createWidget()
052     */
053    @Override
054    public VRichTextArea createWidget() {
055
056        VRichTextArea result = (VRichTextArea)super.createWidget();
057        // We can't just add the style here, we have to wait until the iframe is loaded
058        result.rta.addInitializeHandler(event -> {
059            Element element = result.getElement();
060            IFrameElement iframeElement = IFrameElement.as(
061                CmsDomUtil.nodeListToList(element.getElementsByTagName("iframe")).get(0));
062            String[][] styles = new String[][] {
063                {"lineHeight", "1.55"},
064                {"fontSize", "14px"},
065                {"fontFamily", "\"Open sans\", sans-serif"}};
066            Style styleObj = iframeElement.getContentDocument().getBody().getStyle();
067            for (String[] styleEntry : styles) {
068                styleObj.setProperty(styleEntry[0], styleEntry[1]);
069            }
070        });
071        return result;
072    }
073
074}