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