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    /*
023     * Created 09.03.2004 12:26:39.
024     * $Id: BoxRendererBase.java 1368577 2012-08-02 16:20:31Z lofwyr $
025     */
026    
027    
028    import org.apache.commons.logging.Log;
029    import org.apache.commons.logging.LogFactory;
030    import static org.apache.myfaces.tobago.TobagoConstants.ATTR_HEIGHT;
031    import org.apache.myfaces.tobago.component.ComponentUtil;
032    import org.apache.myfaces.tobago.component.UILayout;
033    import org.apache.myfaces.tobago.util.LayoutUtil;
034    
035    import javax.faces.component.UIComponent;
036    import javax.faces.context.FacesContext;
037    
038    public abstract class BoxRendererBase extends LayoutableRendererBase {
039    
040      private static final Log LOG = LogFactory.getLog(BoxRendererBase.class);
041    
042      public boolean getRendersChildren() {
043        return true;
044      }
045    
046      public int getFixedHeight(FacesContext facesContext, UIComponent component) {
047    
048        int height =
049            ComponentUtil.getIntAttribute(component, ATTR_HEIGHT, -1);
050        if (height != -1) {
051          return height;
052        }
053    
054        // ask layoutManager
055        UIComponent layout = UILayout.getLayout(component);
056        if (layout != null) {
057          LayoutInformationProvider renderer = ComponentUtil.getRenderer(facesContext, layout);
058          height = renderer.getFixedHeight(facesContext, component);
059          if (height > -1) {
060            return height;
061          }
062        }
063    
064        if (LOG.isInfoEnabled()) {
065          LOG.info("Can't calculate fixedHeight! "
066              + "using estimation by contained components. ");
067        }
068    
069        height = LayoutUtil.calculateFixedHeightForChildren(facesContext, component);
070        height += getHeaderHeight(facesContext, component);
071        height += getPaddingHeight(facesContext, component);
072        return height;
073      }
074    
075    }