001    // Copyright May 16, 2006 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 net.sf.tacos.components.dojo;
015    
016    import java.util.HashMap;
017    import java.util.Map;
018    import net.sf.tacos.util.JSONMarkupWriter;
019    import org.apache.tapestry.IMarkupWriter;
020    import org.apache.tapestry.IRequestCycle;
021    import org.apache.tapestry.IScript;
022    import org.apache.tapestry.TapestryUtils;
023    import org.apache.tapestry.json.JSONObject;
024    
025    /**
026     * Implementation of any dojo widget.
027     *
028     * @since 4.1.0
029     * 
030     * TODO: figure out the correct value for isContainer based on dojoType.
031     */
032    public abstract class DojoWidget extends GenericWidget
033    {
034        public abstract String getStyle();
035        
036        public abstract String getDojoType();
037        
038        /**
039         * {@inheritDoc}
040         */
041        public void renderWidget(IMarkupWriter writer, IRequestCycle cycle)
042        {
043            if (!cycle.isRewinding()) {
044                writer.begin(getTemplateTagName()); // use element specified
045                renderIdAttribute(writer, cycle); // render id="" client id
046                writer.attribute("style", getStyle());
047                //renderInformalParameters(writer, cycle);
048            }
049            
050            renderBody(writer, cycle);
051            
052            if (!cycle.isRewinding()) {
053                writer.end();
054            }
055            
056            if (!cycle.isRewinding()) {
057                JSONMarkupWriter jsonWriter = new JSONMarkupWriter();
058                renderInformalParameters(jsonWriter, cycle);
059                JSONObject json = jsonWriter.getAttributes();
060    
061                Map parms = new HashMap();
062                parms.put("component", this);
063                parms.put("type", getDojoType());
064                parms.put("props", json.toString());
065    
066                getScript().execute(this, cycle, TapestryUtils.getPageRenderSupport(cycle, this), parms);
067            }
068        }
069    
070        /** Injected script. */
071        public abstract IScript getScript();
072    }