001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    package org.apache.tapestry.dojo.html;
015    
016    import org.apache.tapestry.AbstractComponent;
017    import org.apache.tapestry.IMarkupWriter;
018    import org.apache.tapestry.IRender;
019    import org.apache.tapestry.IRequestCycle;
020    import org.apache.tapestry.html.Shell;
021    
022    
023    /**
024     * This component that can be used <em>instead of</em> the {@link Shell}, mainly for 
025     * situations where you either don't use the {@link Shell} component or can't because
026     * you are writing portlets.
027     *
028     * @author jkuhnert
029     */
030    public abstract class ScriptIncludes extends AbstractComponent
031    {
032        public abstract IRender getAjaxDelegate();
033        
034        public abstract IRender getDelegate();
035        
036        protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
037        {
038            if (cycle.isRewinding())
039                return;
040            
041            IRender delegate = getDelegate();
042            
043            if (delegate != null)
044                delegate.render(writer, cycle);
045            
046            IRender ajaxDelegate = getAjaxDelegate();
047            
048            if (ajaxDelegate != null)
049                ajaxDelegate.render(writer, cycle);
050        }
051    }