FrameRenderer.java

/**
 * Copyright (c) 2014-2017 by the respective copyright holders.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.eclipse.smarthome.ui.basic.internal.render;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringEscapeUtils;
import org.apache.commons.lang.StringUtils;
import org.eclipse.emf.common.util.EList;
import org.eclipse.smarthome.model.sitemap.Frame;
import org.eclipse.smarthome.model.sitemap.Widget;
import org.eclipse.smarthome.ui.basic.render.RenderException;
import org.eclipse.smarthome.ui.basic.render.WidgetRenderer;

/**
 * This is an implementation of the {@link WidgetRenderer} interface, which
 * can produce HTML code for Frame widgets.
 *
 * @author Kai Kreuzer - Initial contribution and API
 * @author Vlad Ivanov - BasicUI changes
 *
 */
public class FrameRenderer extends AbstractWidgetRenderer {

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean canRender(Widget w) {
        return w instanceof Frame;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public EList<Widget> renderWidget(Widget w, StringBuilder sb) throws RenderException {
        String snippet = getSnippet("frame");
        String label = StringEscapeUtils.escapeHtml(itemUIRegistry.getLabel(w));
        List<String> frameClassList = new ArrayList<>();

        snippet = StringUtils.replace(snippet, "%label%", label);
        snippet = StringUtils.replace(snippet, "%widget_id%", itemUIRegistry.getWidgetId(w));

        if (label.isEmpty()) {
            frameClassList.add("mdl-form--no-label");
        }

        if (!itemUIRegistry.getVisiblity(w)) {
            frameClassList.add("mdl-form--hidden");
        }

        String frameClass = StringUtils.join(frameClassList, ' ');
        snippet = StringUtils.replace(snippet, "%frame_class%", frameClass);

        // Process the color tags
        snippet = processColor(w, snippet);

        sb.append(snippet);
        return itemUIRegistry.getChildren((Frame) w);
    }
}