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. 014 015 package org.apache.tapestry.html; 016 017 import org.apache.tapestry.AbstractComponent; 018 import org.apache.tapestry.IEngine; 019 import org.apache.tapestry.IMarkupWriter; 020 import org.apache.tapestry.IRequestCycle; 021 import org.apache.tapestry.Tapestry; 022 import org.apache.tapestry.engine.IEngineService; 023 import org.apache.tapestry.engine.ILink; 024 025 /** 026 * Implements a <frame> within a <frameset>. [ <a 027 * href="../../../../../ComponentReference/Frame.html">Component Reference </a>] 028 * 029 * @author Howard Lewis Ship 030 */ 031 032 public abstract class Frame extends AbstractComponent 033 { 034 protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) 035 { 036 if (cycle.isRewinding()) 037 return; 038 039 IEngine engine = cycle.getEngine(); 040 IEngineService pageService = engine.getService(Tapestry.PAGE_SERVICE); 041 ILink link = pageService.getLink(cycle, false, getTargetPage()); 042 043 writer.beginEmpty("frame"); 044 writer.attribute("src", link.getURL()); 045 046 renderInformalParameters(writer, cycle); 047 048 writer.closeTag(); 049 } 050 051 public abstract String getTargetPage(); 052 053 public abstract void setTargetPage(String targetPage); 054 }