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21 package org.apache.struts2.components;
22
23 import javax.servlet.http.HttpServletRequest;
24 import javax.servlet.http.HttpServletResponse;
25
26 import org.apache.struts2.views.annotations.StrutsTag;
27 import org.apache.struts2.views.annotations.StrutsTagAttribute;
28
29 import com.opensymphony.xwork2.util.ValueStack;
30
31 /***
32 * <!-- START SNIPPET: javadoc -->
33 * The div tag when used on the ajax theme, provides a remote call
34 * from the current page to update a section of content without having to refresh the entire page.
35 * <p>
36 * It creates a HTML <DIV /> that obtains it's content via a remote XMLHttpRequest call via
37 * the dojo framework.
38 * </p>
39 * <div>
40 * <!-- START SNIPPET: ajaxJavadoc -->
41 * <B>THE FOLLOWING IS ONLY VALID WHEN AJAX IS CONFIGURED</B>
42 * <ul>
43 * <li>href</li>
44 * <li>errorText</li>
45 * <li>afterLoading</li>
46 * <li>executeScripts</li>
47 * <li>loadingText</li>
48 * <li>listenTopics</li>
49 * <li>handler</li>
50 * <li>formId</li>
51 * <li>formFilter</li>
52 * <li>targets</li>
53 * <li>notifyTopics</li>
54 * <li>showErrorTransportText</li>
55 * <li>indicator</li>
56 * </ul>
57 * 'targets' is a list of element ids whose content will be updated with the
58 * text returned from request.<p/>
59 * 'href' needs to be set as an url tag reference value.<p/>
60 * 'errorText' is the text that will be displayed when there is an error making the request.<p/>
61 * 'afterLoading' Deprecated. Use 'notifyTopics'.<p/>
62 * 'executeScripts' if set to true will execute javascript sections in the returned text.<p/>
63 * 'loadingText' is the text that will be displayed on the 'targets' elements while making the
64 * request.<p/>
65 * 'handler' is the name of the function that will take care of making the AJAX request. Dojo's widget
66 * and dom node are passed as parameters).<p/>
67 * 'formId' is the id of the html form whose fields will be seralized and passed as parameters
68 * in the request.<p/>
69 * 'formFilter' is the name of a function which will be used to filter the fields that will be
70 * seralized. This function takes as a parameter the element and returns true if the element
71 * should be included.<p/>
72 * 'updateFreq' sets(in milliseconds) the update interval.
73 * 'autoStart' if set to true(true by default) starts the timer automatically
74 * 'startTimerListenTopics' is a comma-separated list of topics used to start the timer
75 * 'stopTimerListenTopics' is a comma-separated list of topics used to stop the timer
76 * 'listenTopics' comma separated list of topics names, that will trigger a request
77 * 'indicator' element to be shown while the request executing
78 * 'showErrorTransportText': whether errors should be displayed (on 'targets')</p>
79 * 'notifyTopics' comma separated list of topics names, that will be published. Three parameters are passed:
80 * <ul>
81 * <li>data: html or json object when type='load' or type='error'</li>
82 * <li>type: 'before' before the request is made, 'load' when the request succeeds, or 'error' when it fails</li>
83 * <li>request: request javascript object, when type='load' or type='error'</li>
84 * </ul>
85 * <!-- END SNIPPET: javadoc -->
86 * </div><p> <b>Examples</b>
87 *
88 * <pre>
89 * <!-- START SNIPPET: example -->
90 * <s:url id="url" action="AjaxTest" />
91 * <s:div
92 * id="once"
93 * theme="ajax"
94 * href="%{url}"
95 * loadingText="Loading..."
96 * listenTopics="/refresh"
97 * updateFreq="3000"
98 * autoStart="true"
99 * formId="form"
100 *></s:div>
101 * <!-- END SNIPPET: example -->
102 * </pre>
103 * </p>
104 *
105 */
106 @StrutsTag(name="div", tldTagClass="org.apache.struts2.views.jsp.ui.DivTag", description="Render HTML div providing content from remote call via AJAX")
107 public class Div extends AbstractRemoteCallUIBean {
108
109 public static final String TEMPLATE = "div";
110 public static final String TEMPLATE_CLOSE = "div-close";
111 public static final String COMPONENT_NAME = Div.class.getName();
112
113 protected String updateFreq;
114 protected String autoStart;
115 protected String delay;
116 protected String startTimerListenTopics;
117 protected String stopTimerListenTopics;
118 protected String refreshOnShow;
119
120 public Div(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
121 super(stack, request, response);
122 }
123
124 public String getDefaultOpenTemplate() {
125 return TEMPLATE;
126 }
127
128 protected String getDefaultTemplate() {
129 return TEMPLATE_CLOSE;
130 }
131
132 public void evaluateExtraParams() {
133 super.evaluateExtraParams();
134
135 if (updateFreq != null)
136 addParameter("updateFreq", findValue(updateFreq, Integer.class));
137 if (autoStart != null)
138 addParameter("autoStart", findValue(autoStart, Boolean.class));
139 if (refreshOnShow != null)
140 addParameter("refreshOnShow", findValue(refreshOnShow, Boolean.class));
141 if (delay != null)
142 addParameter("delay", findValue(delay, Integer.class));
143 if (startTimerListenTopics != null)
144 addParameter("startTimerListenTopics", findString(startTimerListenTopics));
145 if (stopTimerListenTopics != null)
146 addParameter("stopTimerListenTopics", findString(stopTimerListenTopics));
147 }
148
149 @StrutsTagAttribute(description="Start timer automatically", type="Boolean", defaultValue="true")
150 public void setAutoStart(String autoStart) {
151 this.autoStart = autoStart;
152 }
153
154 @StrutsTagAttribute(description="How long to wait before fetching the content (in milliseconds)", type="Integer")
155 public void setDelay(String delay) {
156 this.delay = delay;
157 }
158
159 @StrutsTagAttribute(description="How often to reload the content (in milliseconds)", type="Integer")
160 public void setUpdateFreq(String updateInterval) {
161 this.updateFreq = updateInterval;
162 }
163
164 @StrutsTagAttribute(description="Topics that will start the timer (for autoupdate)")
165 public void setStartTimerListenTopics(String startTimerListenTopic) {
166 this.startTimerListenTopics = startTimerListenTopic;
167 }
168
169 @StrutsTagAttribute(description="Topics that will stop the timer (for autoupdate)")
170 public void setStopTimerListenTopics(String stopTimerListenTopic) {
171 this.stopTimerListenTopics = stopTimerListenTopic;
172 }
173
174 @StrutsTagAttribute(description="Content will be loaded when div becomes visible, used only inside tabbedPanel", type="Boolean", defaultValue="false")
175 public void setRefreshOnShow(String refreshOnShow) {
176 this.refreshOnShow = refreshOnShow;
177 }
178
179 @StrutsTagAttribute(description="Deprecated. Use 'notifyTopics'. Javascript code execute after reload")
180 public void setAfterLoading(String afterLoading) {
181 this.afterLoading = afterLoading;
182 }
183 }