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Java > Open Source Codes > org > apache > tapestry > html > Frame


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.html;
16
17 import org.apache.tapestry.AbstractComponent;
18 import org.apache.tapestry.IEngine;
19 import org.apache.tapestry.IMarkupWriter;
20 import org.apache.tapestry.IRequestCycle;
21 import org.apache.tapestry.Tapestry;
22 import org.apache.tapestry.engine.IEngineService;
23 import org.apache.tapestry.engine.ILink;
24
25 /**
26  * Implements a &lt;frame&gt; within a &lt;frameset&gt;. [ <a
27  * HREF="../../../../../ComponentReference/Frame.html">Component Reference </a>]
28  *
29  * @author Howard Lewis Ship
30  */
31
32 public abstract class Frame extends AbstractComponent
33 {
34     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
35     {
36         if (cycle.isRewinding())
37             return;
38
39         IEngine engine = cycle.getEngine();
40         IEngineService pageService = engine.getService(Tapestry.PAGE_SERVICE);
41         ILink link = pageService.getLink(cycle, getTargetPage());
42
43         writer.beginEmpty("frame");
44         writer.attribute("src", link.getURL());
45
46         renderInformalParameters(writer, cycle);
47
48         writer.closeTag();
49     }
50
51     public abstract String JavaDoc getTargetPage();
52
53     public abstract void setTargetPage(String JavaDoc targetPage);
54 }
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