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Java > Open Source Codes > org > apache > beehive > netui > tags > rendering > OptionTag


1 /*
2  * Copyright 2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  * $Header:$
17  */

18 package org.apache.beehive.netui.tags.rendering;
19
20 import org.apache.beehive.netui.tags.html.HtmlConstants;
21
22 import java.util.HashMap JavaDoc;
23
24 /**
25  * Body, Start Tag: optional, End tag: optional
26  * Required href
27  */

28 public abstract class OptionTag extends TagHtmlBase implements HtmlConstants
29 {
30     public static void add(HashMap JavaDoc html, HashMap JavaDoc htmlQuirks, HashMap JavaDoc xhtml)
31     {
32         html.put(OPTION_TAG, new HtmlRendering());
33         htmlQuirks.put(OPTION_TAG, new HtmlRendering());
34         xhtml.put(OPTION_TAG, new XhtmlRendering());
35     }
36
37     public static class State extends AbstractHtmlState
38     {
39         public String JavaDoc value;
40         public boolean disabled;
41         public boolean selected;
42
43         public void clear()
44         {
45             super.clear();
46
47             value = null;
48             disabled = false;
49             selected = false;
50         }
51     }
52
53     public void doStartTag(AbstractRenderAppender sb, AbstractTagState renderState)
54     {
55         assert(sb != null) : "Parameter 'sb' must not be null";
56         assert(renderState != null) : "Parameter 'renderState' must not be null";
57         assert(renderState instanceof State) : "Paramater 'renderState' must be an instance of OptionTag.State";
58
59         State state = (State) renderState;
60
61         renderTag(sb, OPTION);
62         renderAttribute(sb, ID, state.id);
63         renderAttribute(sb, CLASS, state.styleClass);
64         renderAttribute(sb, VALUE, state.value);
65         renderDisabled(sb, state.disabled);
66         renderSelected(sb, state.selected);
67
68
69         renderAttributes(AbstractHtmlState.ATTR_GENERAL, sb, state);
70         renderAttribute(sb, STYLE, state.style);
71         renderAttributes(AbstractHtmlState.ATTR_JAVASCRIPT, sb, state);
72         sb.append(">");
73     }
74
75     public void doEndTag(AbstractRenderAppender sb)
76     {
77         renderEndTag(sb, OPTION);
78     }
79
80     abstract protected void renderDisabled(AbstractRenderAppender sb, boolean disabled);
81
82     abstract protected void renderSelected(AbstractRenderAppender sb, boolean selected);
83
84     private static class HtmlRendering extends OptionTag
85     {
86         protected void renderDisabled(AbstractRenderAppender sb, boolean disabled)
87         {
88             if (disabled)
89                 sb.append(" disabled");
90         }
91
92         protected void renderSelected(AbstractRenderAppender sb, boolean selected)
93         {
94             if (selected)
95                 sb.append(" selected");
96         }
97     }
98
99     private static class XhtmlRendering extends OptionTag
100     {
101         protected void renderDisabled(AbstractRenderAppender sb, boolean disabled)
102         {
103             if (disabled)
104                 renderAttribute(sb, "disabled", "disabled");
105         }
106
107         protected void renderSelected(AbstractRenderAppender sb, boolean selected)
108         {
109             if (selected)
110                 renderAttribute(sb, "selected", "selected");
111         }
112     }
113 }
114
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