001    // Copyright 2008, 2010, 2011 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    
015    package org.apache.tapestry5.corelib.components;
016    
017    import org.apache.tapestry5.ComponentResources;
018    import org.apache.tapestry5.MarkupWriter;
019    import org.apache.tapestry5.annotations.Environmental;
020    import org.apache.tapestry5.annotations.SupportsInformalParameters;
021    import org.apache.tapestry5.corelib.internal.AjaxFormLoopContext;
022    import org.apache.tapestry5.ioc.annotations.Inject;
023    import org.apache.tapestry5.services.javascript.JavaScriptSupport;
024    
025    /**
026     * Used inside a {@link org.apache.tapestry5.corelib.components.AjaxFormLoop} to remove the current row from the loop.
027     * This fires a server-side event (from the AjaxFormLoop component); the event context is the object to be removed. On
028     * the client-side, the element for the row is hidden, then removed altogether.
029     * 
030     * @tapestrydoc
031     */
032    @SupportsInformalParameters
033    public class RemoveRowLink
034    {
035        @Inject
036        private ComponentResources resources;
037    
038        @Environmental
039        private AjaxFormLoopContext context;
040    
041        @Environmental
042        private JavaScriptSupport jsSupport;
043    
044        void beginRender(MarkupWriter writer)
045        {
046            String clientId = jsSupport.allocateClientId(resources);
047    
048            writer.element("a",
049    
050            "href", "#",
051    
052            "id", clientId);
053    
054            resources.renderInformalParameters(writer);
055    
056            context.addRemoveRowTrigger(clientId);
057        }
058    
059        void afterRender(MarkupWriter writer)
060        {
061            writer.end();
062        }
063    }