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Java > Open Source Codes > org > apache > tapestry > wml > Image


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.wml;
16
17 import org.apache.tapestry.AbstractComponent;
18 import org.apache.tapestry.IAsset;
19 import org.apache.tapestry.IMarkupWriter;
20 import org.apache.tapestry.IRequestCycle;
21
22 /**
23  * The Image component indicates that an image is to be included in the text flow. Image layout is done within the
24  * context of normal text layout.
25  *
26  * @author David Solis
27  * @since 3.0
28  *
29  **/
30
31 public abstract class Image extends AbstractComponent
32 {
33     /**
34      * @see org.apache.tapestry.AbstractComponent#renderComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle)
35      **/
36
37     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
38     {
39         boolean render = !cycle.isRewinding();
40
41         if (render)
42         {
43             writer.beginEmpty("img");
44
45             writer.attribute("src", getImage().buildURL(cycle));
46
47             writer.attribute("alt", getAlt());
48
49             renderInformalParameters(writer, cycle);
50
51             writer.closeTag();
52         }
53     }
54
55     public abstract IAsset getImage();
56
57     public abstract String JavaDoc getAlt();
58 }
59
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