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 }