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}