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    /*
021     * Created 09.03.2004 12:26:39.
022     * $Id: BoxRendererBase.java 534812 2007-05-03 12:12:23Z bommel $
023     */
024    
025    
026    import org.apache.commons.logging.Log;
027    import org.apache.commons.logging.LogFactory;
028    import static org.apache.myfaces.tobago.TobagoConstants.ATTR_HEIGHT;
029    import org.apache.myfaces.tobago.component.ComponentUtil;
030    import org.apache.myfaces.tobago.component.UILayout;
031    import org.apache.myfaces.tobago.util.LayoutUtil;
032    
033    import javax.faces.component.UIComponent;
034    import javax.faces.context.FacesContext;
035    
036    public abstract class BoxRendererBase extends LayoutableRendererBase {
037    
038      private static final Log LOG = LogFactory.getLog(BoxRendererBase.class);
039    
040      public boolean getRendersChildren() {
041        return true;
042      }
043    
044      public int getFixedHeight(FacesContext facesContext, UIComponent component) {
045    
046        int height =
047            ComponentUtil.getIntAttribute(component, ATTR_HEIGHT, -1);
048        if (height != -1) {
049          return height;
050        }
051    
052        // ask layoutManager
053        UIComponent layout = UILayout.getLayout(component);
054        if (layout != null) {
055          LayoutInformationProvider renderer = ComponentUtil.getRenderer(facesContext, layout);
056          height = renderer.getFixedHeight(facesContext, component);
057          if (height > -1) {
058            return height;
059          }
060        }
061    
062        if (LOG.isInfoEnabled()) {
063          LOG.info("Can't calculate fixedHeight! "
064              + "using estimation by contained components. ");
065        }
066    
067        height = LayoutUtil.calculateFixedHeightForChildren(facesContext, component);
068        height += getHeaderHeight(facesContext, component);
069        height += getPaddingHeight(facesContext, component);
070        return height;
071      }
072    
073    }