    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    }