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1   /*
2    * $Id: Submit.java 651946 2008-04-27 13:41:38Z apetrelli $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.struts2.dojo.components;
23  
24  import java.io.Writer;
25  import java.util.Random;
26  
27  import javax.servlet.http.HttpServletRequest;
28  import javax.servlet.http.HttpServletResponse;
29  
30  import org.apache.struts2.components.Form;
31  import org.apache.struts2.components.FormButton;
32  import org.apache.struts2.views.annotations.StrutsTag;
33  import org.apache.struts2.views.annotations.StrutsTagAttribute;
34  import org.apache.struts2.views.annotations.StrutsTagSkipInheritance;
35  
36  import com.opensymphony.xwork2.util.ValueStack;
37  import com.opensymphony.xwork2.util.logging.Logger;
38  import com.opensymphony.xwork2.util.logging.LoggerFactory;
39  
40  /***
41   * <!-- START SNIPPET: javadoc -->
42   * Renders a submit button that can submit a form asynchronously.
43   * The submit can have three different types of rendering:
44   * <ul>
45   * <li>input: renders as html &lt;input type="submit"...&gt;</li>
46   * <li>image: renders as html &lt;input type="image"...&gt;</li>
47   * <li>button: renders as html &lt;button type="submit"...&gt;</li>
48   * </ul>
49   * Please note that the button type has advantages by adding the possibility to seperate the submitted value from the
50   * text shown on the button face, but has issues with Microsoft Internet Explorer at least up to 6.0
51   * <!-- END SNIPPET: javadoc -->
52   *
53   * <p>Examples</p>
54   * <!-- START SNIPPET: example1 -->
55   * &lt;sx:submit value="%{'Submit'}" /&gt;
56   * <!-- END SNIPPET: example1 -->
57   * 
58   * <!-- START SNIPPET: example2 -->
59   * &lt;sx:submit type="image" value="%{'Submit'}" label="Submit the form" src="submit.gif"/&gt;
60   * <!-- END SNIPPET: example2 -->
61  
62   * <!-- START SNIPPET: example3 -->
63   * &lt;sx:submit type="button" value="%{'Submit'}" label="Submit the form"/&gt;
64   * <!-- END SNIPPET: example3 -->
65   *
66   * <!-- START SNIPPET: example4 -->
67   * &lt;div id="div1"&gt;Div 1&lt;/div&gt;
68   * &lt;s:url id="ajaxTest" value="/AjaxTest.action"/&gt;
69   * 
70   * &lt;sx:submit id="link1" href="%{ajaxTest}" target="div1" /&gt;
71   * <!-- END SNIPPET: example4 -->
72   * 
73   * <!-- START SNIPPET: example5 -->
74   * &lt;s:form id="form" action="AjaxTest"&gt;
75   *      &lt;input type="textbox" name="data"&gt;
76   *      &lt;sx:submit /&gt;          
77   * &lt;/s:form&gt;
78   * <!-- END SNIPPET: example5 -->
79   * 
80   * <!-- START SNIPPET: example6 -->
81   * &lt;s:form id="form" action="AjaxTest"&gt;
82   *      &lt;input type="textbox" name="data"&gt;   
83   * &lt;/s:form&gt;
84   * 
85   * &lt;sx:submit formId="form" /&gt;
86   * <!-- END SNIPPET: example6 -->
87   * 
88   * <!-- START SNIPPET: example7 -->
89   * &lt;script type="text/javascript"&gt;
90   * dojo.event.topic.subscribe("/before", function(event, widget){
91   *     alert('inside a topic event. before request');
92   *     //event: set event.cancel = true, to cancel request
93   *     //widget: widget that published the topic
94   * });
95   * &lt;/script&gt;         
96   * 
97   * &lt;sx:submit beforeNotifyTopics="/before" /&gt;
98   * <!-- END SNIPPET: example7 -->
99   * 
100  * <!-- START SNIPPET: example8 -->
101  * &lt;script type="text/javascript"&gt;
102  * dojo.event.topic.subscribe("/after", function(data, request, widget){
103  *     alert('inside a topic event. after request');
104  *     //data : text returned from request(the html)
105  *     //request: XMLHttpRequest object
106  *     //widget: widget that published the topic
107  * });
108  * &lt;/script&gt;        
109  * 
110  * &lt;sx:submit afterNotifyTopics="/after" highlightColor="red" href="%{#ajaxTest}" /&gt;
111  * <!-- END SNIPPET: example8 -->
112  * 
113  * <!-- START SNIPPET: example9 -->
114  * &lt;script type="text/javascript"&gt;
115  * dojo.event.topic.subscribe("/error", function(error, request, widget){
116  *     alert('inside a topic event. on error');
117  *     //error : error object (error.message has the error message)
118  *     //request: XMLHttpRequest object
119  *     //widget: widget that published the topic
120  * });
121  * &lt;/script&gt;         
122  * 
123  * &lt;img id="ind1" src="${pageContext.request.contextPath}/images/indicator.gif" style="display:none"/&gt;
124  * &lt;sx:submit errorNotifyTopics="/error" indicator="ind1" href="%{#ajaxTest}" /&gt;
125  * <!-- END SNIPPET: example9 -->
126  */
127 @StrutsTag(name="submit", tldTagClass="org.apache.struts2.dojo.views.jsp.ui.SubmitTag", description="Render a submit button")
128 public class Submit extends FormButton implements RemoteBean {
129     
130     private static final Logger LOG = LoggerFactory.getLogger(Submit.class);
131     private final static transient Random RANDOM = new Random();    
132     
133     final public static String TEMPLATE = "submit";
134 
135     protected String href;
136     protected String errorText;
137     protected String executeScripts;
138     protected String loadingText;
139     protected String listenTopics;
140     protected String handler;
141     protected String formId;
142     protected String formFilter;
143     protected String src;
144     protected String notifyTopics;
145     protected String showErrorTransportText;
146     protected String indicator;
147     protected String showLoadingText;
148     protected String targets;
149     protected String beforeNotifyTopics;
150     protected String afterNotifyTopics;
151     protected String errorNotifyTopics;
152     protected String highlightColor;
153     protected String highlightDuration;
154     protected String validate;
155     protected String ajaxAfterValidation;
156     protected String separateScripts;
157     protected String transport;
158     protected String parseContent;
159     
160     public Submit(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
161         super(stack, request, response);
162     }
163 
164     protected String getDefaultTemplate() {
165         return TEMPLATE;
166     }
167 
168     public void evaluateParams() {
169         if ((key == null) && (value == null)) {
170             value = "Submit";
171         }
172 
173         if (((key != null)) && (value == null)) {
174             this.value = "%{getText('"+key +"')}";
175         }
176 
177         super.evaluateParams();
178     }
179 
180     public void evaluateExtraParams() {
181         super.evaluateExtraParams();
182 
183         if (href != null)
184             addParameter("href", findString(href));
185         if (errorText != null)
186             addParameter("errorText", findString(errorText));
187         if (loadingText != null)
188             addParameter("loadingText", findString(loadingText));
189         if (executeScripts != null)
190             addParameter("executeScripts", findValue(executeScripts, Boolean.class));
191         if (listenTopics != null)
192             addParameter("listenTopics", findString(listenTopics));
193         if (notifyTopics != null)
194             addParameter("notifyTopics", findString(notifyTopics));
195         if (handler != null)
196             addParameter("handler", findString(handler));
197         if (formId != null)
198             addParameter("formId", findString(formId));
199         if (formFilter != null)
200             addParameter("formFilter", findString(formFilter));
201         if (src != null)
202             addParameter("src", findString(src));
203         if (indicator != null)
204             addParameter("indicator", findString(indicator));
205         if (targets != null)
206             addParameter("targets", findString(targets));
207         if (showLoadingText != null)
208             addParameter("showLoadingText", findString(showLoadingText));
209         if (showLoadingText != null)
210             addParameter("showLoadingText", findString(showLoadingText));
211         if (beforeNotifyTopics != null)
212             addParameter("beforeNotifyTopics", findString(beforeNotifyTopics));
213         if (afterNotifyTopics != null)
214             addParameter("afterNotifyTopics", findString(afterNotifyTopics));
215         if (errorNotifyTopics != null)
216             addParameter("errorNotifyTopics", findString(errorNotifyTopics));
217         if (highlightColor != null)
218             addParameter("highlightColor", findString(highlightColor));
219         if (highlightDuration != null)
220             addParameter("highlightDuration", findString(highlightDuration));
221         if (separateScripts != null)
222             addParameter("separateScripts", findValue(separateScripts, Boolean.class));
223         if (transport != null)
224             addParameter("transport", findString(transport));
225         if (parseContent != null)
226             addParameter("parseContent", findValue(parseContent, Boolean.class));
227         
228         Boolean validateValue = false;
229         if (validate != null) {
230             validateValue = (Boolean) findValue(validate, Boolean.class);
231             addParameter("validate", validateValue);
232         } 
233         
234         Form form = (Form) findAncestor(Form.class);
235         if (form != null) 
236             addParameter("parentTheme", form.getTheme());
237         
238         if (ajaxAfterValidation != null)
239             addParameter("ajaxAfterValidation", findValue(ajaxAfterValidation, Boolean.class));
240 
241         // generate a random ID if not explicitly set and not parsing the content 
242         Boolean parseContent = (Boolean)stack.getContext().get(Head.PARSE_CONTENT);
243         boolean generateId = (parseContent != null ? !parseContent : true);
244 
245         addParameter("pushId", generateId);
246         if ((this.id == null || this.id.length() == 0) && generateId) {
247             // resolves Math.abs(Integer.MIN_VALUE) issue reported by FindBugs 
248             // http://findbugs.sourceforge.net/bugDescriptions.html#RV_ABSOLUTE_VALUE_OF_RANDOM_INT
249             int nextInt = RANDOM.nextInt();
250             nextInt = nextInt == Integer.MIN_VALUE ? Integer.MAX_VALUE : Math.abs(nextInt);  
251             this.id = "widget_" + String.valueOf(nextInt);
252             addParameter("id", this.id);
253         }
254     }
255 
256     @Override
257     @StrutsTagSkipInheritance
258     public void setTheme(String theme) {
259         super.setTheme(theme);
260     }
261     
262     @Override
263     public String getTheme() {
264         return "ajax";
265     }
266     
267     /***
268      * Indicate whether the concrete button supports the type "image".
269      *
270      * @return <tt>true</tt> to indicate type image is supported.
271      */
272     protected boolean supportsImageType() {
273         return true;
274     }
275     
276     /***
277      * Overrides to be able to render body in a template rather than always before the template
278      */
279     public boolean end(Writer writer, String body) {
280         evaluateParams();
281         try {
282             addParameter("body", body);
283             
284             mergeTemplate(writer, buildTemplateName(template, getDefaultTemplate()));
285         } catch (Exception e) {
286             LOG.error("error when rendering", e);
287         }
288         finally {
289             popComponentStack();
290         }
291 
292         return false;
293     }
294 
295     @StrutsTagAttribute(description="Topic that will trigger the remote call")
296     public void setListenTopics(String listenTopics) {
297         this.listenTopics = listenTopics;
298     }
299 
300     @StrutsTagAttribute(description="The URL to call to obtain the content. Note: If used with ajax context, the value must be set as an url tag value.")
301     public void setHref(String href) {
302         this.href = href;
303     }
304 
305     @StrutsTagAttribute(description="The text to display to the user if the is an error fetching the content")
306     public void setErrorText(String errorText) {
307         this.errorText = errorText;
308     }
309 
310     @StrutsTagAttribute(description="Javascript code in the fetched content will be executed", type="Boolean", defaultValue="false")
311     public void setExecuteScripts(String executeScripts) {
312         this.executeScripts = executeScripts;
313     }
314 
315     @StrutsTagAttribute(description="Text to be shown while content is being fetched", defaultValue="Loading...")
316     public void setLoadingText(String loadingText) {
317         this.loadingText = loadingText;
318     }
319 
320     @StrutsTagAttribute(description="Javascript function name that will make the request")
321     public void setHandler(String handler) {
322         this.handler = handler;
323     }
324 
325     @StrutsTagAttribute(description="Function name used to filter the fields of the form.")
326     public void setFormFilter(String formFilter) {
327         this.formFilter = formFilter;
328     }
329 
330     @StrutsTagAttribute(description="Form id whose fields will be serialized and passed as parameters")
331     public void setFormId(String formId) {
332         this.formId = formId;
333     }
334 
335     @StrutsTagAttribute(description="Supply an image src for <i>image</i> type submit button. Will have no effect for types <i>input</i> and <i>button</i>.")
336     public void setSrc(String src) {
337         this.src = src;
338     }
339 
340     @StrutsTagAttribute(description="Comma delimited list of ids of the elements whose content will be updated")
341     public void setTargets(String targets) {
342         this.targets = targets;
343     }
344 
345     @StrutsTagAttribute(description="Comma delimmited list of topics that will published before and after the request, and on errors")
346     public void setNotifyTopics(String notifyTopics) {
347         this.notifyTopics = notifyTopics;
348     }
349 
350     @StrutsTagAttribute(description="Set whether errors will be shown or not", type="Boolean", defaultValue="true")
351     public void setShowErrorTransportText(String showErrorTransportText) {
352         this.showErrorTransportText = showErrorTransportText;
353     }
354 
355     @StrutsTagAttribute(description="Set indicator")
356     public void setIndicator(String indicator) {
357         this.indicator = indicator;
358     }
359 
360     @StrutsTagAttribute(description="Show loading text on targets", type="Boolean", defaultValue="false")
361     public void setShowLoadingText(String showLoadingText) {
362         this.showLoadingText = showLoadingText;
363     }
364     
365     @StrutsTagAttribute(description="The css class to use for element")
366     public void setCssClass(String cssClass) {
367         super.setCssClass(cssClass);
368     }
369 
370     @StrutsTagAttribute(description="The css style to use for element")
371     public void setCssStyle(String cssStyle) {
372         super.setCssStyle(cssStyle);
373     }
374 
375     @StrutsTagAttribute(description="The id to use for the element")
376     public void setId(String id) {
377         super.setId(id);
378     }
379 
380     @StrutsTagAttribute(description="The name to set for element")
381     public void setName(String name) {
382         super.setName(name);
383     }
384 
385     @StrutsTagAttribute(description="The type of submit to use. Valid values are <i>input</i>, " +
386         "<i>button</i> and <i>image</i>.", defaultValue="input")
387     public void setType(String type) {
388         super.setType(type);
389     }
390 
391     @StrutsTagAttribute(description="Preset the value of input element.")
392     public void setValue(String value) {
393         super.setValue(value);
394     }
395 
396     @StrutsTagAttribute(description="Label expression used for rendering a element specific label")
397     public void setLabel(String label) {
398         super.setLabel(label);
399     }
400     
401     @StrutsTagAttribute(description="Comma delimmited list of topics that will published after the request(if the request succeeds)")
402     public void setAfterNotifyTopics(String afterNotifyTopics) {
403         this.afterNotifyTopics = afterNotifyTopics;
404     }
405 
406     @StrutsTagAttribute(description="Comma delimmited list of topics that will published before the request")
407     public void setBeforeNotifyTopics(String beforeNotifyTopics) {
408         this.beforeNotifyTopics = beforeNotifyTopics;
409     }
410 
411     @StrutsTagAttribute(description="Comma delimmited list of topics that will published after the request(if the request fails)")
412     public void setErrorNotifyTopics(String errorNotifyTopics) {
413         this.errorNotifyTopics = errorNotifyTopics;
414     }
415     
416     @StrutsTagAttribute(description = "Color used to perform a highlight effect on the elements specified in the 'targets' attribute", 
417         defaultValue = "none")
418     public void setHighlightColor(String highlightColor) {
419         this.highlightColor = highlightColor;
420     }
421 
422     @StrutsTagAttribute(description = "Duration of highlight effect in milliseconds. Only valid if 'highlightColor' attribute is set", 
423         defaultValue = "1000")
424     public void setHighlightDuration(String highlightDuration) {
425         this.highlightDuration = highlightDuration;
426     }
427 
428     @StrutsTagAttribute(description = "Perform Ajax calidation. 'ajaxValidation' interceptor must be applied to action", type="Boolean", 
429         defaultValue = "false")
430     public void setValidate(String validate) {
431         this.validate = validate;
432     }
433 
434     @StrutsTagAttribute(description = "Make an asynchronous request if validation succeeds. Only valid if 'validate' is 'true'", type="Boolean", 
435         defaultValue = "false")
436     public void setAjaxAfterValidation(String ajaxAfterValidation) {
437         this.ajaxAfterValidation = ajaxAfterValidation;
438     }
439 
440     @StrutsTagSkipInheritance
441     public void setAction(String action) {
442         super.setAction(action);
443     }
444     
445     @StrutsTagAttribute(description="Run scripts in a separate scope, unique for each tag", defaultValue="true")
446     public void setSeparateScripts(String separateScripts) {
447         this.separateScripts = separateScripts;
448     }
449     
450     @StrutsTagAttribute(description="Transport used by Dojo to make the request", defaultValue="XMLHTTPTransport")
451     public void setTransport(String transport) {
452         this.transport = transport;
453     }
454     
455     @StrutsTagAttribute(description="Parse returned HTML for Dojo widgets", defaultValue="true", type="Boolean")
456     public void setParseContent(String parseContent) {
457         this.parseContent = parseContent;
458     }
459 }