001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *   http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package org.apache.myfaces.tobago.renderkit;
021    
022    import org.apache.commons.logging.Log;
023    import org.apache.commons.logging.LogFactory;
024    import org.apache.myfaces.tobago.component.ComponentUtil;
025    import org.apache.myfaces.tobago.util.LayoutUtil;
026    
027    import javax.faces.component.UIComponent;
028    import javax.faces.context.FacesContext;
029    import java.io.IOException;
030    
031    
032    /*
033     * User: weber
034     * Date: Feb 22, 2005
035     * Time: 3:05:58 PM
036     */
037    public abstract class LayoutRenderer extends LayoutableRendererBase {
038    
039      private static final Log LOG = LogFactory.getLog(LayoutRenderer.class);
040    
041      public abstract void prepareRender(FacesContext facesContext, UIComponent component);
042    
043    
044      public void encodeChildrenOfComponent(FacesContext facesContext, UIComponent component)
045          throws IOException {
046        // use renderer of component
047        LayoutableRendererBase renderer = ComponentUtil.getRenderer(facesContext, component);
048        renderer.encodeChildren(facesContext, component);
049      }
050    
051      @Override
052      public int getFixedHeight(FacesContext facesContext, UIComponent component) {
053        int height = 0;
054    
055        if (LOG.isInfoEnabled() && component.getChildCount() > 1) {
056          LOG.info("Can't calculate fixedHeight! "
057              + "using estimation by contained components. ");
058        }
059        height += LayoutUtil.calculateFixedHeightForChildren(facesContext, component);
060    
061        LayoutInformationProvider containerRenderer =
062            ComponentUtil.getRenderer(facesContext, component);
063        if (containerRenderer != null) {
064          height += containerRenderer.getHeaderHeight(facesContext, component);
065          height += containerRenderer.getPaddingHeight(facesContext, component);
066        }
067    
068        return height;
069      }
070    
071    }