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
015package org.apache.tapestry5.corelib.components;
016
017import org.apache.tapestry5.ComponentResources;
018import org.apache.tapestry5.MarkupWriter;
019import org.apache.tapestry5.annotations.Environmental;
020import org.apache.tapestry5.annotations.SupportsInformalParameters;
021import org.apache.tapestry5.corelib.internal.AjaxFormLoopContext;
022import org.apache.tapestry5.ioc.annotations.Inject;
023import 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
033public 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}