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1
4 package org.apache.myfaces.custom.jslistener;
5
6 import org.apache.myfaces.renderkit.RendererUtils;
7 import org.apache.myfaces.renderkit.html.HTML;
8 import org.apache.myfaces.renderkit.html.HtmlRenderer;
9 import org.apache.myfaces.custom.jsvalueset.HtmlJsValueSet;
10 import org.apache.myfaces.component.html.util.AddResource;
11 import org.apache.commons.logging.Log;
12 import org.apache.commons.logging.LogFactory;
13
14 import javax.faces.application.Application;
15 import javax.faces.component.UIComponent;
16 import javax.faces.component.UINamingContainer;
17 import javax.faces.context.FacesContext;
18 import javax.faces.context.ResponseWriter;
19 import java.io.IOException  ;
20 import java.util.Collection ;
21 import java.util.Iterator ;
22 import java.util.Map ;
23
24
36 public class JsValueChangeListenerRenderer
37 extends HtmlRenderer
38 {
39 private static Log log = LogFactory.getLog(JsValueChangeListenerRenderer.class);
40
41 public void encodeEnd(FacesContext facesContext, UIComponent component)
42 throws IOException
43 {
44 RendererUtils.checkParamValidity(facesContext, component, JsValueChangeListener.class);
45
46 UIComponent parent = component.getParent();
47
48 JsValueChangeListener jsValueChangeListener = (JsValueChangeListener) component;
49
50
51 String aFor = jsValueChangeListener.getFor();
52 String expressionValue = jsValueChangeListener.getExpressionValue();
53 String property = jsValueChangeListener.getProperty();
54
55 AddResource.addJavaScriptToHeader(
56 JsValueChangeListenerTag.class, "JSListener.js", false, getFacesContext());
57
58 if(aFor!=null)
59 {
60 UIComponent forComponent = component.findComponent(aFor);
61
62 String forComponentId = null;
63
64 if (forComponent == null)
65 {
66 if (log.isInfoEnabled())
67 {
68 log.info("Unable to find component '" + aFor + "' (calling findComponent on component '" + component.getClientId(getFacesContext()) + "') - will try to render component id based on the parent-id (on same level)");
69 }
70 if (aFor.length() > 0 && aFor.charAt(0) == UINamingContainer.SEPARATOR_CHAR)
71 {
72 forComponentId = aFor.substring(1);
74 }
75 else
76 {
77 String labelClientId = component.getClientId(getFacesContext());
79 int colon = labelClientId.lastIndexOf(UINamingContainer.SEPARATOR_CHAR);
80 if (colon == -1)
81 {
82 forComponentId = aFor;
83 }
84 else
85 {
86 forComponentId = labelClientId.substring(0, colon + 1) + aFor;
87 }
88 }
89 }
90 else
91 {
92 forComponentId = forComponent.getClientId(getFacesContext());
93 }
94
95 expressionValue = expressionValue.replaceAll("\\'","\\\\'");
96 expressionValue = expressionValue.replaceAll("\"","\\\"");
97
98
99 String methodCall = "orgApacheMyfacesJsListenerSetExpressionProperty('"+
100 parent.getClientId(getFacesContext())+"','"+
101 forComponentId+"',"+
102 (property==null?"null":"'"+property+"'")+
103 ",'"+expressionValue+"');";
104
105
106 callMethod(parent, "onchange",methodCall);
107
108 }
109 }
110
111 private void callMethod(UIComponent uiComponent, String propName, String value)
112 {
113 Object oldValue = uiComponent.getAttributes().get(propName);
114
115 if(oldValue != null)
116 {
117 String oldValueStr = oldValue.toString().trim();
118
119 if(oldValueStr.indexOf(value)!=-1)
121 return;
122
123 if(oldValueStr.length()>0 && !oldValueStr.endsWith(";"))
124 oldValueStr +=";";
125
126 value = oldValueStr + value;
127
128 }
129
130 uiComponent.getAttributes().put(propName, value);
131 }
132
133
134 protected Application getApplication()
135 {
136 return getFacesContext().getApplication();
137 }
138
139 protected FacesContext getFacesContext()
140 {
141 return FacesContext.getCurrentInstance();
142 }
143
144 }
145 |
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