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xajaxRequest.inc.php @ 259

Revision 259, 8.6 KB (checked in by exi, 15 years ago)
Including the xajax mod into svn

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1	<?php
2	/*
3	File: xajaxRequest.inc.php
4
5	Contains the xajaxRequest class
6
7	Title: xajaxRequest class
8
9	Please see <copyright.inc.php> for a detailed description, copyright
10	and license information.
11	*/
12
13	/*
14	@package xajax
15	@version $Id: xajaxRequest.inc.php 362 2007-05-29 15:32:24Z calltoconstruct $
16	@copyright Copyright (c) 2005-2006 by Jared White & J. Max Wilson
17	@license http://www.xajaxproject.org/bsd_license.txt BSD License
18	*/
19
20	/*
21	Constant: XAJAX_FORM_VALUES
22	Specifies that the parameter will consist of an array of form values.
23
24	Constant: XAJAX_INPUT_VALUE
25	Specifies that the parameter will contain the value of an input control.
26
27	Constant: XAJAX_CHECKED_VALUE
28	Specifies that the parameter will consist of a boolean value of a checkbox.
29
30	Constant: XAJAX_ELEMENT_INNERHTML
31	Specifies that the parameter value will be the innerHTML value of the element.
32
33	Constant: XAJAX_QUOTED_VALUE
34	Specifies that the parameter will be a quoted value (string).
35
36	Constant: XAJAX_JS_VALUE
37	Specifies that the parameter will be a non-quoted value (evaluated by the
38	browsers javascript engine at run time.
39	*/
40	if (!defined ('XAJAX_FORM_VALUES')) define ('XAJAX_FORM_VALUES', 'get form values');
41	if (!defined ('XAJAX_INPUT_VALUE')) define ('XAJAX_INPUT_VALUE', 'get input value');
42	if (!defined ('XAJAX_CHECKED_VALUE')) define ('XAJAX_CHECKED_VALUE', 'get checked value');
43	if (!defined ('XAJAX_ELEMENT_INNERHTML')) define ('XAJAX_ELEMENT_INNERHTML', 'get element innerHTML');
44	if (!defined ('XAJAX_QUOTED_VALUE')) define ('XAJAX_QUOTED_VALUE', 'quoted value');
45	if (!defined ('XAJAX_JS_VALUE')) define ('XAJAX_JS_VALUE', 'unquoted value');
46
47	/*
48	Class: xajaxRequest
49
50	Used to store and generate the client script necessary to invoke
51	a xajax request from the browser to the server script.
52
53	This object is typically generated by the <xajax->register> method
54	and can be used to quickly generate the javascript that is used
55	to initiate a xajax request to the registered function, object, event
56	or other xajax call.
57	*/
58	class xajaxRequest
59	{
60	/*
61	String: sName
62
63	The name of the function.
64	*/
65	var $sName;
66
67	/*
68	String: sQuoteCharacter
69
70	A string containing either a single or a double quote character
71	that will be used during the generation of the javascript for
72	this function. This can be set prior to calling <xajaxRequest->printScript>
73	*/
74	var $sQuoteCharacter;
75
76	/*
77	Array: aParameters
78
79	An array of parameters that will be used to populate the argument list
80	for this function when the javascript is output in <xajaxRequest->printScript>
81	*/
82	var $aParameters;
83
84	/*
85	Function: xajaxRequest
86
87	Construct and initialize this request.
88
89	sName - (string): The name of this request.
90	*/
91	function xajaxRequest($sName)
92	{
93	$this->aParameters = array();
94	$this->sQuoteCharacter = '"';
95	$this->sName = $sName;
96	}
97
98	/*
99	Function: useSingleQuote
100
101	Call this to instruct the request to use single quotes when generating
102	the javascript.
103	*/
104	function useSingleQuote()
105	{
106	$this->sQuoteCharacter = "'";
107	}
108
109	/*
110	Function: useDoubleQuote
111
112	Call this to instruct the request to use double quotes while generating
113	the javascript.
114	*/
115	function useDoubleQuote()
116	{
117	$this->sQuoteCharacter = '"';
118	}
119
120	/*
121	Function: clearParameters
122
123	Clears the parameter list associated with this request.
124	*/
125	function clearParameters()
126	{
127	$this->aParameters = array();
128	}
129
130	/*
131	Function: addParameter
132
133	Adds a parameter value to the parameter list for this request.
134
135	sType - (string): The type of the value to be used.
136	sValue - (string: The value to be used.
137
138	See <xajaxRequest->setParameter> for details.
139	*/
140	function addParameter()
141	{
142	$aArgs = func_get_args();
143
144	if (1 < count($aArgs))
145	$this->setParameter(
146	count($this->aParameters),
147	$aArgs[0],
148	$aArgs[1]);
149	}
150
151	/*
152	Function: setParameter
153
154	Sets a specific parameter value.
155
156	nParameter - (number): The index of the parameter to set
157	sType - (string): The type of value
158	sValue - (string): The value as it relates to the specified type
159
160	Types should be one of the following <XAJAX_FORM_VALUES>, <XAJAX_QUOTED_VALUE>,
161	<XAJAX_JS_VALUE>, <XAJAX_INPUT_VALUE>, <XAJAX_CHECKED_VALUE>.
162	The value should be as follows:
163	<XAJAX_FORM_VALUES> - Use the ID of the form you want to process.
164	<XAJAX_QUOTED_VALUE> - The string data to be passed.
165	<XAJAX_JS_VALUE> - A string containing valid javascript (either a javascript
166	variable name that will be in scope at the time of the call or a
167	javascript function call whose return value will become the parameter.
168
169	TODO: finish documenting the options.
170	*/
171	function setParameter()
172	{
173	$aArgs = func_get_args();
174
175	if (2 < count($aArgs))
176	{
177	$nParameter = $aArgs[0];
178	$sType = $aArgs[1];
179
180	if (XAJAX_FORM_VALUES == $sType)
181	{
182	$sFormID = $aArgs[2];
183	$this->aParameters[$nParameter] =
184	"xajax.getFormValues("
185	. $this->sQuoteCharacter
186	. $sFormID
187	. $this->sQuoteCharacter
188	. ")";
189	}
190	else if (XAJAX_INPUT_VALUE == $sType)
191	{
192	$sInputID = $aArgs[2];
193	$this->aParameters[$nParameter] =
194	"xajax.$("
195	. $this->sQuoteCharacter
196	. $sInputID
197	. $this->sQuoteCharacter
198	. ").value";
199	}
200	else if (XAJAX_CHECKED_VALUE == $sType)
201	{
202	$sCheckedID = $aArgs[2];
203	$this->aParameters[$nParameter] =
204	"xajax.$("
205	. $this->sQuoteCharacter
206	. $sCheckedID
207	. $this->sQuoteCharacter
208	. ").checked";
209	}
210	else if (XAJAX_ELEMENT_INNERHTML == $sType)
211	{
212	$sElementID = $aArgs[2];
213	$this->aParameters[$nParameter] =
214	"xajax.$("
215	. $this->sQuoteCharacter
216	. $sElementID
217	. $this->sQuoteCharacter
218	. ").innerHTML";
219	}
220	else if (XAJAX_QUOTED_VALUE == $sType)
221	{
222	$sValue = $aArgs[2];
223	$this->aParameters[$nParameter] =
224	$this->sQuoteCharacter
225	. $sValue
226	. $this->sQuoteCharacter;
227	}
228	else if (XAJAX_JS_VALUE == $sType)
229	{
230	$sValue = $aArgs[2];
231	$this->aParameters[$nParameter] = $sValue;
232	}
233	}
234	}
235
236	/*
237	Function: getScript
238
239	Returns a string representation of the script output (javascript) from
240	this request object. See also: <xajaxRequest::printScript>
241	*/
242	function getScript()
243	{
244	ob_start();
245	$this->printScript();
246	return ob_get_clean();
247	}
248
249	/*
250	Function: printScript
251
252	Generates a block of javascript code that can be used to invoke
253	the specified xajax request.
254	*/
255	function printScript()
256	{
257	$sOutput = $this->sName;
258	$sOutput .= "(";
259
260	$sSeparator = "";
261
262	foreach ($this->aParameters as $sParameter)
263	{
264	$sOutput .= $sSeparator;
265	$sOutput .= $sParameter;
266	$sSeparator = ", ";
267	}
268
269	$sOutput .= ")";
270
271	print $sOutput;
272	}
273	}
274
275	/*
276	Class: xajaxCustomRequest
277
278	This class extends the <xajaxRequest> class such that simple javascript
279	can be put in place of a xajax request to the server. The primary purpose
280	of this class is to provide simple scripting services to the <xajaxControl>
281	based objects, like <clsInput>, <clsTable> and <clsButton>.
282	*/
283	class xajaxCustomRequest extends xajaxRequest
284	{
285	/*
286	Array: aVariables;
287	*/
288	var $aVariables;
289
290	/*
291	String: sScript;
292	*/
293	var $sScript;
294
295	/*
296	Function: xajaxCustomRequest
297
298	Constructs and initializes an instance of the object.
299
300	sScript - (string): The javascript (template) that will be printed
301	upon request.
302	aVariables - (associative array, optional): An array of variable name,
303	value pairs that will be passed to <xajaxCustomRequest->setVariable>
304	*/
305	function xajaxCustomRequest($sScript)
306	{
307	$this->aVariables = array();
308	$this->sScript = $sScript;
309	}
310
311	/*
312	Function: clearVariables
313
314	Clears the array of variables that will be used to modify the script before
315	it is printed and sent to the client.
316	*/
317	function clearVariables()
318	{
319	$this->aVariables = array();
320	}
321
322	/*
323	Function: setVariable
324
325	Sets a value that will be used to modify the script before it is sent to
326	the browser. The <xajaxCustomRequest> object will perform a string
327	replace operation on each of the values set with this function.
328	*/
329	function setVariable($sName, $sValue)
330	{
331	$this->aVariables[$sName] = $sValue;
332	}
333
334	/*
335	Function: printScript
336	*/
337	function printScript()
338	{
339	$sScript = $this->sScript;
340	foreach ($this->aVariables as $sKey => $sValue)
341	$sScript = str_replace($sKey, $sValue, $sScript);
342	echo $sScript;
343	}
344	}

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