1 |
|
|
2 |
|
|
3 |
|
|
4 |
|
|
5 |
|
|
6 |
|
|
7 |
|
|
8 |
|
|
9 |
|
|
10 |
|
|
11 |
|
|
12 |
|
|
13 |
|
|
14 |
|
|
15 |
|
package org.apache.tapestry.contrib.link; |
16 |
|
|
17 |
|
import org.apache.hivemind.ApplicationRuntimeException; |
18 |
|
import org.apache.tapestry.IMarkupWriter; |
19 |
|
import org.apache.tapestry.IRequestCycle; |
20 |
|
import org.apache.tapestry.PageRenderSupport; |
21 |
|
import org.apache.tapestry.Tapestry; |
22 |
|
import org.apache.tapestry.TapestryUtils; |
23 |
|
import org.apache.tapestry.components.ILinkComponent; |
24 |
|
import org.apache.tapestry.engine.ILink; |
25 |
|
import org.apache.tapestry.link.DefaultLinkRenderer; |
26 |
|
import org.apache.tapestry.link.ILinkRenderer; |
27 |
|
|
28 |
|
|
29 |
|
|
30 |
|
|
31 |
|
|
32 |
|
|
33 |
|
|
34 |
|
|
35 |
|
|
36 |
|
|
37 |
|
|
38 |
|
|
39 |
|
|
40 |
|
|
41 |
|
|
42 |
|
|
43 |
|
|
44 |
|
|
45 |
|
|
46 |
|
|
47 |
|
|
48 |
|
|
49 |
|
|
50 |
|
|
51 |
0 |
public class FormLinkRenderer extends DefaultLinkRenderer |
52 |
|
{ |
53 |
|
|
54 |
|
|
55 |
|
|
56 |
|
|
57 |
|
|
58 |
|
|
59 |
|
|
60 |
0 |
public static final ILinkRenderer RENDERER = new FormLinkRenderer(); |
61 |
|
|
62 |
|
public void renderLink(IMarkupWriter writer, IRequestCycle cycle, |
63 |
|
ILinkComponent linkComponent) |
64 |
|
{ |
65 |
0 |
IMarkupWriter wrappedWriter = null; |
66 |
|
|
67 |
0 |
if (cycle.getAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME) != null) |
68 |
0 |
throw new ApplicationRuntimeException(Tapestry |
69 |
|
.getMessage("AbstractLinkComponent.no-nesting"), |
70 |
|
linkComponent, null, null); |
71 |
|
|
72 |
0 |
cycle.setAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME, |
73 |
|
linkComponent); |
74 |
|
|
75 |
0 |
String formName = cycle.getUniqueId("LinkForm"); |
76 |
|
|
77 |
0 |
boolean hasBody = getHasBody(); |
78 |
|
|
79 |
0 |
boolean disabled = linkComponent.isDisabled(); |
80 |
|
|
81 |
0 |
if (!disabled && !cycle.isRewinding()) |
82 |
|
{ |
83 |
0 |
ILink l = linkComponent.getLink(cycle); |
84 |
0 |
String anchor = linkComponent.getAnchor(); |
85 |
|
|
86 |
0 |
PageRenderSupport prs = TapestryUtils.getPageRenderSupport(cycle, linkComponent); |
87 |
|
|
88 |
0 |
String function = generateFormFunction(formName, l, anchor); |
89 |
0 |
prs.addBodyScript(linkComponent, function); |
90 |
|
|
91 |
0 |
if (hasBody) |
92 |
0 |
writer.begin(getElement()); |
93 |
|
else |
94 |
0 |
writer.beginEmpty(getElement()); |
95 |
|
|
96 |
0 |
writer.attribute(getUrlAttribute(), "javascript: document." |
97 |
|
+ formName + ".submit();"); |
98 |
|
|
99 |
0 |
beforeBodyRender(writer, cycle, linkComponent); |
100 |
|
|
101 |
|
|
102 |
|
|
103 |
|
|
104 |
|
|
105 |
0 |
wrappedWriter = writer.getNestedWriter(); |
106 |
0 |
} |
107 |
0 |
else wrappedWriter = writer; |
108 |
|
|
109 |
0 |
if (hasBody) linkComponent.renderBody(wrappedWriter, cycle); |
110 |
|
|
111 |
0 |
if (!disabled && !cycle.isRewinding()) |
112 |
|
{ |
113 |
0 |
afterBodyRender(writer, cycle, linkComponent); |
114 |
|
|
115 |
0 |
linkComponent.renderAdditionalAttributes(writer, cycle); |
116 |
|
|
117 |
0 |
if (hasBody) |
118 |
|
{ |
119 |
0 |
wrappedWriter.close(); |
120 |
|
|
121 |
|
|
122 |
|
|
123 |
0 |
writer.end(); |
124 |
|
} |
125 |
0 |
else writer.closeTag(); |
126 |
|
} |
127 |
|
|
128 |
0 |
cycle.removeAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME); |
129 |
|
|
130 |
0 |
} |
131 |
|
|
132 |
|
private String generateFormFunction(String formName, ILink link, |
133 |
|
String anchor) |
134 |
|
{ |
135 |
0 |
String[] parameterNames = link.getParameterNames(); |
136 |
|
|
137 |
0 |
StringBuffer buf = new StringBuffer(); |
138 |
0 |
buf.append("function prepare" + formName + "() {\n"); |
139 |
|
|
140 |
0 |
buf.append(" var html = \"\";\n"); |
141 |
0 |
buf.append(" html += \"<div style='position: absolute'>\";\n"); |
142 |
|
|
143 |
0 |
String url = link.getURL(anchor, false); |
144 |
0 |
buf.append(" html += \"<form name='" + formName |
145 |
|
+ "' method='post' action='" + url + "'>\";\n"); |
146 |
|
|
147 |
0 |
for(int i = 0; i < parameterNames.length; i++) |
148 |
|
{ |
149 |
0 |
String parameter = parameterNames[i]; |
150 |
0 |
String[] values = link.getParameterValues(parameter); |
151 |
0 |
if (values != null) { |
152 |
0 |
for (int j = 0; j < values.length; j++) { |
153 |
0 |
String value = values[j]; |
154 |
0 |
buf.append(" html += \"<input type='hidden' name='" + parameter + "' value='" + value + "'/>\";\n"); |
155 |
|
} |
156 |
|
} |
157 |
|
} |
158 |
0 |
buf.append(" html += \"<\" + \"/form>\";\n"); |
159 |
0 |
buf.append(" html += \"<\" + \"/div>\";\n"); |
160 |
0 |
buf.append(" document.write(html);\n"); |
161 |
0 |
buf.append("}\n"); |
162 |
|
|
163 |
0 |
buf.append("prepare" + formName + "();\n\n"); |
164 |
|
|
165 |
0 |
return buf.toString(); |
166 |
|
} |
167 |
|
|
168 |
|
} |