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[ckeditor.git] / skins / ckeditor / ckeditor_php5.php
1 <?php
2 /*
3 * Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
4 * For licensing, see LICENSE.html or http://ckeditor.com/license
5 */
6
7 /**
8 * \brief CKEditor class that can be used to create editor
9 * instances in PHP pages on server side.
10 * @see http://ckeditor.com
11 *
12 * Sample usage:
13 * @code
14 * $CKEditor = new CKEditor();
15 * $CKEditor->editor("editor1", "<p>Initial value.</p>");
16 * @endcode
17 */
18 class CKEditor
19 {
20 /**
21 * The version of %CKEditor.
22 */
23 const version = '3.6.1';
24 /**
25 * A constant string unique for each release of %CKEditor.
26 */
27 const timestamp = 'B5GJ5GG';
28
29 /**
30 * URL to the %CKEditor installation directory (absolute or relative to document root).
31 * If not set, CKEditor will try to guess it's path.
32 *
33 * Example usage:
34 * @code
35 * $CKEditor->basePath = '/ckeditor/';
36 * @endcode
37 */
38 public $basePath;
39 /**
40 * An array that holds the global %CKEditor configuration.
41 * For the list of available options, see http://docs.cksource.com/ckeditor_api/symbols/CKEDITOR.config.html
42 *
43 * Example usage:
44 * @code
45 * $CKEditor->config['height'] = 400;
46 * // Use @@ at the beggining of a string to ouput it without surrounding quotes.
47 * $CKEditor->config['width'] = '@@screen.width * 0.8';
48 * @endcode
49 */
50 public $config = array();
51 /**
52 * A boolean variable indicating whether CKEditor has been initialized.
53 * Set it to true only if you have already included
54 * &lt;script&gt; tag loading ckeditor.js in your website.
55 */
56 public $initialized = false;
57 /**
58 * Boolean variable indicating whether created code should be printed out or returned by a function.
59 *
60 * Example 1: get the code creating %CKEditor instance and print it on a page with the "echo" function.
61 * @code
62 * $CKEditor = new CKEditor();
63 * $CKEditor->returnOutput = true;
64 * $code = $CKEditor->editor("editor1", "<p>Initial value.</p>");
65 * echo "<p>Editor 1:</p>";
66 * echo $code;
67 * @endcode
68 */
69 public $returnOutput = false;
70 /**
71 * An array with textarea attributes.
72 *
73 * When %CKEditor is created with the editor() method, a HTML &lt;textarea&gt; element is created,
74 * it will be displayed to anyone with JavaScript disabled or with incompatible browser.
75 */
76 public $textareaAttributes = array( "rows" => 8, "cols" => 60 );
77 /**
78 * A string indicating the creation date of %CKEditor.
79 * Do not change it unless you want to force browsers to not use previously cached version of %CKEditor.
80 */
81 public $timestamp = "B5GJ5GG";
82 /**
83 * An array that holds event listeners.
84 */
85 private $events = array();
86 /**
87 * An array that holds global event listeners.
88 */
89 private $globalEvents = array();
90
91 /**
92 * Main Constructor.
93 *
94 * @param $basePath (string) URL to the %CKEditor installation directory (optional).
95 */
96 function __construct($basePath = null) {
97 if (!empty($basePath)) {
98 $this->basePath = $basePath;
99 }
100 }
101
102 /**
103 * Creates a %CKEditor instance.
104 * In incompatible browsers %CKEditor will downgrade to plain HTML &lt;textarea&gt; element.
105 *
106 * @param $name (string) Name of the %CKEditor instance (this will be also the "name" attribute of textarea element).
107 * @param $value (string) Initial value (optional).
108 * @param $config (array) The specific configurations to apply to this editor instance (optional).
109 * @param $events (array) Event listeners for this editor instance (optional).
110 *
111 * Example usage:
112 * @code
113 * $CKEditor = new CKEditor();
114 * $CKEditor->editor("field1", "<p>Initial value.</p>");
115 * @endcode
116 *
117 * Advanced example:
118 * @code
119 * $CKEditor = new CKEditor();
120 * $config = array();
121 * $config['toolbar'] = array(
122 * array( 'Source', '-', 'Bold', 'Italic', 'Underline', 'Strike' ),
123 * array( 'Image', 'Link', 'Unlink', 'Anchor' )
124 * );
125 * $events['instanceReady'] = 'function (ev) {
126 * alert("Loaded: " + ev.editor.name);
127 * }';
128 * $CKEditor->editor("field1", "<p>Initial value.</p>", $config, $events);
129 * @endcode
130 */
131 public function editor($name, $value = "", $config = array(), $events = array())
132 {
133 $attr = "";
134 foreach ($this->textareaAttributes as $key => $val) {
135 $attr.= " " . $key . '="' . str_replace('"', '&quot;', $val) . '"';
136 }
137 $out = "<textarea name=\"" . $name . "\"" . $attr . ">" . htmlspecialchars($value) . "</textarea>\n";
138 if (!$this->initialized) {
139 $out .= $this->init();
140 }
141
142 $_config = $this->configSettings($config, $events);
143
144 $js = $this->returnGlobalEvents();
145 if (!empty($_config))
146 $js .= "CKEDITOR.replace('".$name."', ".$this->jsEncode($_config).");";
147 else
148 $js .= "CKEDITOR.replace('".$name."');";
149
150 $out .= $this->script($js);
151
152 if (!$this->returnOutput) {
153 print $out;
154 $out = "";
155 }
156
157 return $out;
158 }
159
160 /**
161 * Replaces a &lt;textarea&gt; with a %CKEditor instance.
162 *
163 * @param $id (string) The id or name of textarea element.
164 * @param $config (array) The specific configurations to apply to this editor instance (optional).
165 * @param $events (array) Event listeners for this editor instance (optional).
166 *
167 * Example 1: adding %CKEditor to &lt;textarea name="article"&gt;&lt;/textarea&gt; element:
168 * @code
169 * $CKEditor = new CKEditor();
170 * $CKEditor->replace("article");
171 * @endcode
172 */
173 public function replace($id, $config = array(), $events = array())
174 {
175 $out = "";
176 if (!$this->initialized) {
177 $out .= $this->init();
178 }
179
180 $_config = $this->configSettings($config, $events);
181
182 $js = $this->returnGlobalEvents();
183 if (!empty($_config)) {
184 $js .= "CKEDITOR.replace('".$id."', ".$this->jsEncode($_config).");";
185 }
186 else {
187 $js .= "CKEDITOR.replace('".$id."');";
188 }
189 $out .= $this->script($js);
190
191 if (!$this->returnOutput) {
192 print $out;
193 $out = "";
194 }
195
196 return $out;
197 }
198
199 /**
200 * Replace all &lt;textarea&gt; elements available in the document with editor instances.
201 *
202 * @param $className (string) If set, replace all textareas with class className in the page.
203 *
204 * Example 1: replace all &lt;textarea&gt; elements in the page.
205 * @code
206 * $CKEditor = new CKEditor();
207 * $CKEditor->replaceAll();
208 * @endcode
209 *
210 * Example 2: replace all &lt;textarea class="myClassName"&gt; elements in the page.
211 * @code
212 * $CKEditor = new CKEditor();
213 * $CKEditor->replaceAll( 'myClassName' );
214 * @endcode
215 */
216 public function replaceAll($className = null)
217 {
218 $out = "";
219 if (!$this->initialized) {
220 $out .= $this->init();
221 }
222
223 $_config = $this->configSettings();
224
225 $js = $this->returnGlobalEvents();
226 if (empty($_config)) {
227 if (empty($className)) {
228 $js .= "CKEDITOR.replaceAll();";
229 }
230 else {
231 $js .= "CKEDITOR.replaceAll('".$className."');";
232 }
233 }
234 else {
235 $classDetection = "";
236 $js .= "CKEDITOR.replaceAll( function(textarea, config) {\n";
237 if (!empty($className)) {
238 $js .= " var classRegex = new RegExp('(?:^| )' + '". $className ."' + '(?:$| )');\n";
239 $js .= " if (!classRegex.test(textarea.className))\n";
240 $js .= " return false;\n";
241 }
242 $js .= " CKEDITOR.tools.extend(config, ". $this->jsEncode($_config) .", true);";
243 $js .= "} );";
244
245 }
246
247 $out .= $this->script($js);
248
249 if (!$this->returnOutput) {
250 print $out;
251 $out = "";
252 }
253
254 return $out;
255 }
256
257 /**
258 * Adds event listener.
259 * Events are fired by %CKEditor in various situations.
260 *
261 * @param $event (string) Event name.
262 * @param $javascriptCode (string) Javascript anonymous function or function name.
263 *
264 * Example usage:
265 * @code
266 * $CKEditor->addEventHandler('instanceReady', 'function (ev) {
267 * alert("Loaded: " + ev.editor.name);
268 * }');
269 * @endcode
270 */
271 public function addEventHandler($event, $javascriptCode)
272 {
273 if (!isset($this->events[$event])) {
274 $this->events[$event] = array();
275 }
276 // Avoid duplicates.
277 if (!in_array($javascriptCode, $this->events[$event])) {
278 $this->events[$event][] = $javascriptCode;
279 }
280 }
281
282 /**
283 * Clear registered event handlers.
284 * Note: this function will have no effect on already created editor instances.
285 *
286 * @param $event (string) Event name, if not set all event handlers will be removed (optional).
287 */
288 public function clearEventHandlers($event = null)
289 {
290 if (!empty($event)) {
291 $this->events[$event] = array();
292 }
293 else {
294 $this->events = array();
295 }
296 }
297
298 /**
299 * Adds global event listener.
300 *
301 * @param $event (string) Event name.
302 * @param $javascriptCode (string) Javascript anonymous function or function name.
303 *
304 * Example usage:
305 * @code
306 * $CKEditor->addGlobalEventHandler('dialogDefinition', 'function (ev) {
307 * alert("Loading dialog: " + ev.data.name);
308 * }');
309 * @endcode
310 */
311 public function addGlobalEventHandler($event, $javascriptCode)
312 {
313 if (!isset($this->globalEvents[$event])) {
314 $this->globalEvents[$event] = array();
315 }
316 // Avoid duplicates.
317 if (!in_array($javascriptCode, $this->globalEvents[$event])) {
318 $this->globalEvents[$event][] = $javascriptCode;
319 }
320 }
321
322 /**
323 * Clear registered global event handlers.
324 * Note: this function will have no effect if the event handler has been already printed/returned.
325 *
326 * @param $event (string) Event name, if not set all event handlers will be removed (optional).
327 */
328 public function clearGlobalEventHandlers($event = null)
329 {
330 if (!empty($event)) {
331 $this->globalEvents[$event] = array();
332 }
333 else {
334 $this->globalEvents = array();
335 }
336 }
337
338 /**
339 * Prints javascript code.
340 *
341 * @param string $js
342 */
343 private function script($js)
344 {
345 $out = "<script type=\"text/javascript\">";
346 $out .= "//<![CDATA[\n";
347 $out .= $js;
348 $out .= "\n//]]>";
349 $out .= "</script>\n";
350
351 return $out;
352 }
353
354 /**
355 * Returns the configuration array (global and instance specific settings are merged into one array).
356 *
357 * @param $config (array) The specific configurations to apply to editor instance.
358 * @param $events (array) Event listeners for editor instance.
359 */
360 private function configSettings($config = array(), $events = array())
361 {
362 $_config = $this->config;
363 $_events = $this->events;
364
365 if (is_array($config) && !empty($config)) {
366 $_config = array_merge($_config, $config);
367 }
368
369 if (is_array($events) && !empty($events)) {
370 foreach ($events as $eventName => $code) {
371 if (!isset($_events[$eventName])) {
372 $_events[$eventName] = array();
373 }
374 if (!in_array($code, $_events[$eventName])) {
375 $_events[$eventName][] = $code;
376 }
377 }
378 }
379
380 if (!empty($_events)) {
381 foreach($_events as $eventName => $handlers) {
382 if (empty($handlers)) {
383 continue;
384 }
385 else if (count($handlers) == 1) {
386 $_config['on'][$eventName] = '@@'.$handlers[0];
387 }
388 else {
389 $_config['on'][$eventName] = '@@function (ev){';
390 foreach ($handlers as $handler => $code) {
391 $_config['on'][$eventName] .= '('.$code.')(ev);';
392 }
393 $_config['on'][$eventName] .= '}';
394 }
395 }
396 }
397
398 return $_config;
399 }
400
401 /**
402 * Return global event handlers.
403 */
404 private function returnGlobalEvents()
405 {
406 static $returnedEvents;
407 $out = "";
408
409 if (!isset($returnedEvents)) {
410 $returnedEvents = array();
411 }
412
413 if (!empty($this->globalEvents)) {
414 foreach ($this->globalEvents as $eventName => $handlers) {
415 foreach ($handlers as $handler => $code) {
416 if (!isset($returnedEvents[$eventName])) {
417 $returnedEvents[$eventName] = array();
418 }
419 // Return only new events
420 if (!in_array($code, $returnedEvents[$eventName])) {
421 $out .= ($code ? "\n" : "") . "CKEDITOR.on('". $eventName ."', $code);";
422 $returnedEvents[$eventName][] = $code;
423 }
424 }
425 }
426 }
427
428 return $out;
429 }
430
431 /**
432 * Initializes CKEditor (executed only once).
433 */
434 private function init()
435 {
436 static $initComplete;
437 $out = "";
438
439 if (!empty($initComplete)) {
440 return "";
441 }
442
443 if ($this->initialized) {
444 $initComplete = true;
445 return "";
446 }
447
448 $args = "";
449 $ckeditorPath = $this->ckeditorPath();
450
451 if (!empty($this->timestamp) && $this->timestamp != "%"."TIMESTAMP%") {
452 $args = '?t=' . $this->timestamp;
453 }
454
455 // Skip relative paths...
456 if (strpos($ckeditorPath, '..') !== 0) {
457 $out .= $this->script("window.CKEDITOR_BASEPATH='". $ckeditorPath ."';");
458 }
459
460 $out .= "<script type=\"text/javascript\" src=\"" . $ckeditorPath . 'ckeditor.js' . $args . "\"></script>\n";
461
462 $extraCode = "";
463 if ($this->timestamp != self::timestamp) {
464 $extraCode .= ($extraCode ? "\n" : "") . "CKEDITOR.timestamp = '". $this->timestamp ."';";
465 }
466 if ($extraCode) {
467 $out .= $this->script($extraCode);
468 }
469
470 $initComplete = $this->initialized = true;
471
472 return $out;
473 }
474
475 /**
476 * Return path to ckeditor.js.
477 */
478 private function ckeditorPath()
479 {
480 if (!empty($this->basePath)) {
481 return $this->basePath;
482 }
483
484 /**
485 * The absolute pathname of the currently executing script.
486 * Note: If a script is executed with the CLI, as a relative path, such as file.php or ../file.php,
487 * $_SERVER['SCRIPT_FILENAME'] will contain the relative path specified by the user.
488 */
489 if (isset($_SERVER['SCRIPT_FILENAME'])) {
490 $realPath = dirname($_SERVER['SCRIPT_FILENAME']);
491 }
492 else {
493 /**
494 * realpath - Returns canonicalized absolute pathname
495 */
496 $realPath = realpath( './' ) ;
497 }
498
499 /**
500 * The filename of the currently executing script, relative to the document root.
501 * For instance, $_SERVER['PHP_SELF'] in a script at the address http://example.com/test.php/foo.bar
502 * would be /test.php/foo.bar.
503 */
504 $selfPath = dirname($_SERVER['PHP_SELF']);
505 $file = str_replace("\\", "/", __FILE__);
506
507 if (!$selfPath || !$realPath || !$file) {
508 return "/ckeditor/";
509 }
510
511 $documentRoot = substr($realPath, 0, strlen($realPath) - strlen($selfPath));
512 $fileUrl = substr($file, strlen($documentRoot));
513 $ckeditorUrl = str_replace("ckeditor_php5.php", "", $fileUrl);
514
515 return $ckeditorUrl;
516 }
517
518 /**
519 * This little function provides a basic JSON support.
520 *
521 * @param mixed $val
522 * @return string
523 */
524 private function jsEncode($val)
525 {
526 if (is_null($val)) {
527 return 'null';
528 }
529 if (is_bool($val)) {
530 return $val ? 'true' : 'false';
531 }
532 if (is_int($val)) {
533 return $val;
534 }
535 if (is_float($val)) {
536 return str_replace(',', '.', $val);
537 }
538 if (is_array($val) || is_object($val)) {
539 if (is_array($val) && (array_keys($val) === range(0,count($val)-1))) {
540 return '[' . implode(',', array_map(array($this, 'jsEncode'), $val)) . ']';
541 }
542 $temp = array();
543 foreach ($val as $k => $v){
544 $temp[] = $this->jsEncode("{$k}") . ':' . $this->jsEncode($v);
545 }
546 return '{' . implode(',', $temp) . '}';
547 }
548 // String otherwise
549 if (strpos($val, '@@') === 0)
550 return substr($val, 2);
551 if (strtoupper(substr($val, 0, 9)) == 'CKEDITOR.')
552 return $val;
553
554 return '"' . str_replace(array("\\", "/", "\n", "\t", "\r", "\x08", "\x0c", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'), $val) . '"';
555 }
556 }