001// Copyright 2004, 2005 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.tapestry.html; 016 017import org.apache.tapestry.AbstractComponent; 018import org.apache.tapestry.IMarkupWriter; 019import org.apache.tapestry.IRequestCycle; 020import org.apache.tapestry.engine.IEngineService; 021import org.apache.tapestry.engine.ILink; 022 023/** 024 * Implements a <frame> within a <frameset>. [ <a 025 * href="../../../../../ComponentReference/Frame.html">Component Reference </a>] 026 * 027 * @author Howard Lewis Ship 028 */ 029 030public abstract class Frame extends AbstractComponent 031{ 032 /** 033 * Injected engine service. 034 * 035 * @since 4.0 036 */ 037 public abstract IEngineService getPageService(); 038 039 protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) 040 { 041 IEngineService pageService = getPageService(); 042 ILink link = pageService.getLink(false, getTargetPage()); 043 044 writer.beginEmpty("frame"); 045 writer.attribute("src", link.getURL()); 046 047 renderInformalParameters(writer, cycle); 048 049 writer.closeTag(); 050 } 051 052 public abstract String getTargetPage(); 053 054 public abstract void setTargetPage(String targetPage); 055}