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1 | <?php |
de4d58cb |
2 | /** |
3 | * Template.class.php |
4 | * |
5 | * This file contains an abstract (PHP 4, so "abstract" is relative) |
6 | * class meant to define the basic template interface for the |
7 | * SquirrelMail core application. Subclasses should extend this |
8 | * class with any custom functionality needed to interface a target |
9 | * templating engine with SquirrelMail. |
10 | * |
11 | * @copyright © 2003-2006 The SquirrelMail Project Team |
12 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License |
13 | * @version $Id$ |
14 | * @package squirrelmail |
15 | * @subpackage Template |
16 | * @since 1.5.2 |
17 | * |
18 | */ |
19 | |
948be6d4 |
20 | /** load template functions */ |
d281e128 |
21 | require(SM_PATH . 'functions/template/general_util.php'); |
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22 | |
de4d58cb |
23 | /** |
24 | * The SquirrelMail Template class. |
25 | * |
26 | * Basic template class for capturing values and pluging them into a template. |
27 | * This class uses a similar API to Smarty. |
28 | * |
29 | * Methods that must be implemented by subclasses are as follows (see method |
30 | * stubs below for further information about expected behavior): |
31 | * |
32 | * assign() |
33 | * assign_by_ref() |
d4c2aa24 |
34 | * clear_all_assign() |
35 | * get_template_vars() |
de4d58cb |
36 | * append() |
37 | * append_by_ref() |
38 | * apply_template() |
39 | * |
01520835 |
40 | * @author Paul Lesniewski <paul at squirrelmail.org> |
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41 | * @package squirrelmail |
42 | * |
43 | */ |
44 | class Template |
45 | { |
46 | |
47 | /** |
48 | * The template ID |
49 | * |
50 | * @var string |
51 | * |
52 | */ |
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53 | var $template_set_id = ''; |
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54 | |
55 | /** |
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56 | * The template set base directory (relative path from |
57 | * the main SquirrelMail directory (SM_PATH)) |
de4d58cb |
58 | * |
59 | * @var string |
60 | * |
61 | */ |
62 | var $template_dir = ''; |
63 | |
64 | /** |
65 | * The template engine (please use constants defined in constants.php) |
66 | * |
67 | * @var string |
68 | * |
69 | */ |
70 | var $template_engine = ''; |
71 | |
72 | /** |
d4c2aa24 |
73 | * The fall-back template ID |
de4d58cb |
74 | * |
75 | * @var string |
76 | * |
77 | */ |
d4c2aa24 |
78 | var $fallback_template_set_id = ''; |
de4d58cb |
79 | |
80 | /** |
d4c2aa24 |
81 | * The fall-back template directory (relative |
82 | * path from the main SquirrelMail directory (SM_PATH)) |
de4d58cb |
83 | * |
84 | * @var string |
85 | * |
86 | */ |
d4c2aa24 |
87 | var $fallback_template_dir = ''; |
de4d58cb |
88 | |
89 | /** |
d4c2aa24 |
90 | * The fall-back template engine (please use |
91 | * constants defined in constants.php) |
de4d58cb |
92 | * |
93 | * @var string |
94 | * |
95 | */ |
d4c2aa24 |
96 | var $fallback_template_engine = ''; |
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97 | |
98 | /** |
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99 | * Template file cache. Structured as an array, whose keys |
100 | * are all the template file names (with path information relative |
101 | * to the template set's base directory, e.g., "css/style.css") |
102 | * found in all parent template sets including the ultimate fall-back |
103 | * template set. Array values are sub-arrays with the |
104 | * following key-value pairs: |
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105 | * |
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106 | * PATH -- file path, relative to SM_PATH |
107 | * SET_ID -- the ID of the template set that this file belongs to |
108 | * ENGINE -- the engine needed to render this template file |
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109 | * |
110 | */ |
d4c2aa24 |
111 | var $template_file_cache = array(); |
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112 | |
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113 | /** |
d4c2aa24 |
114 | * Extra template engine class objects for rendering templates |
115 | * that require a different engine than the one for the current |
116 | * template set. Keys should be the name of the template engine, |
117 | * values are the corresponding class objects. |
118 | * |
119 | * @var array |
120 | * |
121 | */ |
122 | var $other_template_engine_objects = array(); |
123 | |
de4d58cb |
124 | /** |
125 | * Constructor |
126 | * |
127 | * Please do not call directly. Use Template::construct_template(). |
128 | * |
d4c2aa24 |
129 | * @param string $template_set_id the template ID |
de4d58cb |
130 | * |
131 | */ |
d4c2aa24 |
132 | function Template($template_set_id) { |
de4d58cb |
133 | //FIXME: find a way to test that this is ONLY ever called |
134 | // from the construct_template() method (I doubt it |
135 | // is worth the trouble to parse the current stack trace) |
136 | // if (???) |
137 | // trigger_error('Please do not use default Template() constructor. Instead, use Template::construct_template().', E_USER_ERROR); |
138 | |
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139 | $this->set_up_template($template_set_id); |
de4d58cb |
140 | |
141 | } |
142 | |
143 | /** |
144 | * Construct Template |
145 | * |
146 | * This method should always be called instead of trying |
147 | * to get a Template object from the normal/default constructor, |
148 | * and is necessary in order to control the return value. |
149 | * |
d4c2aa24 |
150 | * @param string $template_set_id the template ID |
de4d58cb |
151 | * |
152 | * @return object The correct Template object for the given template set |
153 | * |
d4c2aa24 |
154 | * @static |
155 | * |
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156 | */ |
d4c2aa24 |
157 | function construct_template($template_set_id) { |
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158 | |
d4c2aa24 |
159 | $template = new Template($template_set_id); |
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160 | $template->override_plugins(); |
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161 | return $template->get_template_engine_subclass(); |
162 | |
163 | } |
164 | |
165 | /** |
166 | * Set up internal attributes |
167 | * |
168 | * This method does most of the work for setting up |
169 | * newly constructed objects. |
170 | * |
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171 | * @param string $template_set_id the template ID |
de4d58cb |
172 | * |
173 | */ |
d4c2aa24 |
174 | function set_up_template($template_set_id) { |
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175 | |
176 | // FIXME: do we want to place any restrictions on the ID like |
177 | // making sure no slashes included? |
178 | // get template ID |
179 | // |
d4c2aa24 |
180 | $this->template_set_id = $template_set_id; |
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181 | |
182 | |
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183 | $this->fallback_template_set_id = Template::get_fallback_template_set(); |
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184 | |
185 | |
186 | // set up template directories |
187 | // |
188 | $this->template_dir |
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189 | = Template::calculate_template_file_directory($this->template_set_id); |
190 | $this->fallback_template_dir |
191 | = Template::calculate_template_file_directory($this->fallback_template_set_id); |
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192 | |
193 | |
d4c2aa24 |
194 | // determine template engine |
195 | // FIXME: assuming PHP template engine may not necessarily be a good thing |
de4d58cb |
196 | // |
d4c2aa24 |
197 | $this->template_engine = Template::get_template_config($this->template_set_id, |
198 | 'template_engine', |
199 | SQ_PHP_TEMPLATE); |
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200 | |
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201 | |
d4c2aa24 |
202 | // get template file cache |
203 | // |
204 | $this->template_file_cache = Template::cache_template_file_hierarchy(); |
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205 | |
d4c2aa24 |
206 | } |
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207 | |
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208 | /** |
209 | * Determine what the ultimate fallback template set is. |
210 | * |
211 | * NOTE that if the fallback setting cannot be found in the |
212 | * main SquirrelMail configuration settings that the value |
213 | * of $default is returned. |
214 | * |
215 | * @param string $default The template set ID to use if |
216 | * the fallback setting cannot be |
217 | * found in SM config (optional; |
218 | * defaults to "default"). |
219 | * |
220 | * @return string The ID of the fallback template set. |
221 | * |
222 | * @static |
223 | * |
224 | */ |
225 | function get_fallback_template_set($default='default') { |
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226 | |
d4c2aa24 |
227 | // FIXME: do we want to place any restrictions on the ID such as |
228 | // making sure no slashes included? |
de4d58cb |
229 | |
d4c2aa24 |
230 | // values are in main SM config file |
de4d58cb |
231 | // |
d4c2aa24 |
232 | global $templateset_fallback, $aTemplateSet; |
233 | $aTemplateSet = (!isset($aTemplateSet) || !is_array($aTemplateSet) |
234 | ? array() : $aTemplateSet); |
235 | $templateset_fallback = (!isset($templateset_fallback) |
293906dd |
236 | ? $default : $templateset_fallback); |
d4c2aa24 |
237 | |
293906dd |
238 | // iterate through all template sets, is this a valid skin ID? |
239 | // |
240 | $found_it = FALSE; |
241 | foreach ($aTemplateSet as $aTemplate) { |
f4138e60 |
242 | if ($aTemplate['ID'] === $templateset_fallback) { |
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243 | $found_it = TRUE; |
244 | break; |
245 | } |
246 | } |
247 | |
248 | if ($found_it) |
249 | return $templateset_fallback; |
250 | |
251 | // FIXME: note that it is possible for $default to |
252 | // point to an invalid (nonexistent) template set |
253 | // and that error will not be caught here |
254 | // |
255 | return $default; |
d4c2aa24 |
256 | |
257 | } |
258 | |
259 | /** |
260 | * Determine what the default template set is. |
261 | * |
262 | * NOTE that if the default setting cannot be found in the |
263 | * main SquirrelMail configuration settings that the value |
264 | * of $default is returned. |
265 | * |
266 | * @param string $default The template set ID to use if |
267 | * the default setting cannot be |
268 | * found in SM config (optional; |
269 | * defaults to "default"). |
270 | * |
271 | * @return string The ID of the default template set. |
272 | * |
273 | * @static |
274 | * |
275 | */ |
276 | function get_default_template_set($default='default') { |
277 | |
278 | // FIXME: do we want to place any restrictions on the ID such as |
279 | // making sure no slashes included? |
280 | |
281 | // values are in main SM config file |
282 | // |
283 | global $templateset_default, $aTemplateSet; |
284 | $aTemplateSet = (!isset($aTemplateSet) || !is_array($aTemplateSet) |
285 | ? array() : $aTemplateSet); |
286 | $templateset_default = (!isset($templateset_default) |
293906dd |
287 | ? $default : $templateset_default); |
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288 | |
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289 | // iterate through all template sets, is this a valid skin ID? |
290 | // |
291 | $found_it = FALSE; |
292 | foreach ($aTemplateSet as $aTemplate) { |
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293 | if ($aTemplate['ID'] === $templateset_default) { |
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294 | $found_it = TRUE; |
295 | break; |
296 | } |
297 | } |
298 | |
299 | if ($found_it) |
300 | return $templateset_default; |
301 | |
302 | // FIXME: note that it is possible for $default to |
303 | // point to an invalid (nonexistent) template set |
304 | // and that error will not be caught here |
305 | // |
306 | return $default; |
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307 | |
308 | } |
309 | |
34904996 |
310 | /** |
311 | * Allow template set to override plugin configuration by either |
312 | * adding or removing plugins. |
313 | * |
314 | */ |
315 | function override_plugins() { |
316 | |
317 | global $disable_plugins, $plugins, $squirrelmail_plugin_hooks; |
318 | if ($disable_plugins) return; |
319 | |
320 | $add_plugins = Template::get_template_config($this->template_set_id, |
321 | 'add_plugins', array()); |
322 | $remove_plugins = Template::get_template_config($this->template_set_id, |
323 | 'remove_plugins', array()); |
324 | |
325 | //FIXME (?) we assume $add_plugins and $remove_plugins are arrays -- we could |
326 | // error check here, or just assume that template authors or admins |
327 | // won't screw up their config files |
328 | |
329 | |
330 | // disable all plugins? (can still add some by using $add_plugins) |
331 | // |
332 | if (in_array('*', $remove_plugins)) { |
333 | $plugins = array(); |
334 | $squirrelmail_plugin_hooks = array(); |
335 | $remove_plugins = array(); |
336 | } |
337 | |
338 | |
339 | foreach ($add_plugins as $plugin_name) { |
340 | // add plugin to global plugin array |
341 | // |
342 | $plugins[] = $plugin_name; |
343 | |
344 | |
345 | // enable plugin -- emulate code from use_plugin() function |
346 | // in SquirrelMail core, but also need to call the |
347 | // "squirrelmail_plugin_init_<plugin_name>" function, which |
348 | // in static configuration is not called (this inconsistency |
349 | // could be a source of anomalous-seeming bugs in poorly |
350 | // coded plugins) |
351 | // |
352 | if (file_exists(SM_PATH . "plugins/$plugin_name/setup.php")) { |
353 | include_once(SM_PATH . "plugins/$plugin_name/setup.php"); |
354 | |
355 | $function = "squirrelmail_plugin_init_$plugin_name"; |
356 | if (function_exists($function)) |
357 | $function(); |
358 | } |
359 | } |
360 | |
361 | foreach ($remove_plugins as $plugin_name) { |
362 | // remove plugin from both global plugin & plugin hook arrays |
363 | // |
364 | $plugin_key = array_search($plugin_name, $plugins); |
365 | if (!is_null($plugin_key) && $plugin_key !== FALSE) { |
366 | unset($plugins[$plugin_key]); |
367 | if (is_array($squirrelmail_plugin_hooks)) |
368 | foreach (array_keys($squirrelmail_plugin_hooks) as $hookName) { |
369 | unset($squirrelmail_plugin_hooks[$hookName][$plugin_name]); |
370 | } |
371 | } |
372 | } |
373 | |
374 | } |
375 | |
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376 | /** |
377 | * Instantiate and return correct subclass for this template |
378 | * set's templating engine. |
379 | * |
d4c2aa24 |
380 | * @param string $template_set_id The template set whose engine |
381 | * is to be used as an override |
382 | * (if not given, this template |
383 | * set's engine is used) (optional). |
384 | * |
de4d58cb |
385 | * @return object The Template subclass object for the template engine. |
386 | * |
387 | */ |
d4c2aa24 |
388 | function get_template_engine_subclass($template_set_id='') { |
389 | |
390 | if (empty($template_set_id)) $template_set_id = $this->template_set_id; |
391 | // FIXME: assuming PHP template engine may not necessarily be a good thing |
392 | $engine = Template::get_template_config($template_set_id, |
393 | 'template_engine', SQ_PHP_TEMPLATE); |
394 | |
de4d58cb |
395 | |
396 | $engine_class_file = SM_PATH . 'class/template/' |
d4c2aa24 |
397 | . $engine . 'Template.class.php'; |
de4d58cb |
398 | |
399 | if (!file_exists($engine_class_file)) { |
d4c2aa24 |
400 | trigger_error('Unknown template engine (' . $engine |
de4d58cb |
401 | . ') was specified in template configuration file', |
402 | E_USER_ERROR); |
403 | } |
404 | |
d4c2aa24 |
405 | $engine_class = $engine . 'Template'; |
406 | require_once($engine_class_file); |
407 | return new $engine_class($template_set_id); |
de4d58cb |
408 | |
409 | } |
410 | |
411 | /** |
412 | * Determine the relative template directory path for |
413 | * the given template ID. |
414 | * |
d4c2aa24 |
415 | * @param string $template_set_id The template ID from which to build |
416 | * the directory path |
de4d58cb |
417 | * |
418 | * @return string The relative template path (based off of SM_PATH) |
419 | * |
d4c2aa24 |
420 | * @static |
421 | * |
de4d58cb |
422 | */ |
d4c2aa24 |
423 | function calculate_template_file_directory($template_set_id) { |
de4d58cb |
424 | |
d4c2aa24 |
425 | return 'templates/' . $template_set_id . '/'; |
de4d58cb |
426 | |
427 | } |
428 | |
429 | /** |
430 | * Determine the relative images directory path for |
431 | * the given template ID. |
432 | * |
d4c2aa24 |
433 | * @param string $template_set_id The template ID from which to build |
434 | * the directory path |
de4d58cb |
435 | * |
436 | * @return string The relative images path (based off of SM_PATH) |
437 | * |
d4c2aa24 |
438 | * @static |
439 | * |
de4d58cb |
440 | */ |
d4c2aa24 |
441 | function calculate_template_images_directory($template_set_id) { |
de4d58cb |
442 | |
d4c2aa24 |
443 | return 'templates/' . $template_set_id . '/images/'; |
de4d58cb |
444 | |
445 | } |
446 | |
447 | /** |
448 | * Return the relative template directory path for this template set. |
449 | * |
450 | * @return string The relative path to the template directory based |
451 | * from the main SquirrelMail directory (SM_PATH). |
452 | * |
453 | */ |
454 | function get_template_file_directory() { |
455 | |
456 | return $this->template_dir; |
457 | |
458 | } |
459 | |
d4c2aa24 |
460 | /** |
461 | * Return the template ID for the fallback template set. |
462 | * |
463 | * @return string The ID of the fallback template set. |
464 | * |
465 | */ |
466 | function get_fallback_template_set_id() { |
467 | |
468 | return $this->fallback_template_set_id; |
469 | |
470 | } |
de4d58cb |
471 | |
472 | /** |
d4c2aa24 |
473 | * Return the relative template directory path for the |
474 | * fallback template set. |
de4d58cb |
475 | * |
d4c2aa24 |
476 | * @return string The relative path to the fallback template |
477 | * directory based from the main SquirrelMail |
478 | * directory (SM_PATH). |
479 | * |
480 | */ |
481 | function get_fallback_template_file_directory() { |
482 | |
483 | return $this->fallback_template_dir; |
484 | |
485 | } |
486 | |
487 | /** |
488 | * Get template set config setting |
489 | * |
490 | * Given a template set ID and setting name, returns the |
491 | * setting's value. Note that settings are cached in |
492 | * session, so "live" changes to template configuration |
493 | * won't be reflected until the user logs out and back |
494 | * in again. |
495 | * |
496 | * @param string $template_set_id The template set for which |
497 | * to look up the setting. |
498 | * @param string $setting The name of the setting to |
499 | * retrieve. |
500 | * @param mixed $default When the requested setting |
501 | * is not found, the contents |
502 | * of this value are returned |
503 | * instead (optional; default |
504 | * is NULL). |
505 | * NOTE that unlike sqGetGlobalVar(), |
506 | * this function will also return |
507 | * the default value if the |
508 | * requested setting is found |
509 | * but is empty. |
510 | * @param boolean $live_config When TRUE, the target template |
511 | * set's configuration file is |
512 | * reloaded every time this |
513 | * method is called. Default |
514 | * behavior is to only load the |
515 | * configuration file if it had |
516 | * never been loaded before, but |
517 | * not again after that (optional; |
518 | * default FALSE). Use with care! |
519 | * Should mostly be used for |
520 | * debugging. |
521 | * |
522 | * @return mixed The desired setting's value or if not found, |
523 | * the contents of $default are returned. |
524 | * |
525 | * @static |
526 | * |
527 | */ |
528 | function get_template_config($template_set_id, $setting, |
529 | $default=NULL, $live_config=FALSE) { |
530 | |
531 | sqGetGlobalVar('template_configuration_settings', |
532 | $template_configuration_settings, |
533 | SQ_SESSION, |
534 | array()); |
535 | |
536 | if ($live_config) unset($template_configuration_settings[$template_set_id]); |
537 | |
538 | |
539 | // NOTE: could use isset() instead of empty() below, but |
540 | // this function is designed to replace empty values |
541 | // as well as non-existing values with $default |
542 | // |
543 | if (!empty($template_configuration_settings[$template_set_id][$setting])) |
544 | return $template_configuration_settings[$template_set_id][$setting]; |
545 | |
546 | |
547 | // if template set configuration has been loaded, but this |
548 | // setting is not known, return $default |
549 | // |
550 | if (!empty($template_configuration_settings[$template_set_id])) |
551 | return $default; |
552 | |
553 | |
554 | // otherwise (template set configuration has not been loaded before), |
555 | // load it into session and return the desired setting after that |
556 | // |
557 | $template_config_file = SM_PATH |
558 | . Template::calculate_template_file_directory($template_set_id) |
559 | . 'config.php'; |
560 | |
561 | if (!file_exists($template_config_file)) { |
562 | |
563 | trigger_error('No template configuration file was found where expected: ("' |
564 | . $template_config_file . '")', E_USER_ERROR); |
565 | |
566 | } else { |
567 | |
568 | // we require() the file to let PHP do the variable value |
569 | // parsing for us, and read the file in manually so we can |
570 | // know what variable names are used in the config file |
571 | // (settings can be different depending on specific requirements |
572 | // of different template engines)... the other way this may |
573 | // be accomplished is to somehow diff the symbol table |
574 | // before/after the require(), but anyway, this code should |
575 | // only run once for this template set... |
576 | // |
577 | require($template_config_file); |
578 | $file_contents = implode("\n", file($template_config_file)); |
579 | |
580 | |
581 | // note that this assumes no template settings have |
582 | // a string in them that looks like a variable name like $x |
583 | // also note that this will attempt to grab things like |
584 | // $Id found in CVS headers, so we try to adjust for that |
585 | // by checking that the variable is actually set |
586 | // |
587 | preg_match_all('/\$(\w+)/', $file_contents, $variables, PREG_PATTERN_ORDER); |
588 | foreach ($variables[1] as $variable) { |
589 | if (isset($$variable)) |
590 | $template_configuration_settings[$template_set_id][$variable] |
591 | = $$variable; |
592 | } |
593 | |
594 | sqsession_register($template_configuration_settings, |
595 | 'template_configuration_settings'); |
596 | |
597 | // NOTE: could use isset() instead of empty() below, but |
598 | // this function is designed to replace empty values |
599 | // as well as non-existing values with $default |
600 | // |
601 | if (!empty($template_configuration_settings[$template_set_id][$setting])) |
602 | return $template_configuration_settings[$template_set_id][$setting]; |
603 | else |
604 | return $default; |
605 | |
606 | } |
607 | |
608 | } |
609 | |
610 | /** |
611 | * Obtain template file hierarchy from cache. |
612 | * |
613 | * If the file hierarchy does not exist in session, it is |
614 | * constructed and stored in session before being returned |
615 | * to the caller. |
616 | * |
617 | * @param boolean $regenerate_cache When TRUE, the file hierarchy |
618 | * is reloaded and stored fresh |
619 | * (optional; default FALSE). |
620 | * @param array $additional_files Must be in same form as the |
621 | * files in the file hierarchy |
622 | * cache. These are then added |
623 | * to the cache (optional; default |
624 | * empty - no additional files). |
625 | * |
626 | * @return array Template file hierarchy array, whose keys |
627 | * are all the template file names (with path |
628 | * information relative to the template set's |
629 | * base directory, e.g., "css/style.css") |
630 | * found in all parent template sets including |
631 | * the ultimate fall-back template set. |
632 | * Array values are sub-arrays with the |
633 | * following key-value pairs: |
634 | * |
635 | * PATH -- file path, relative to SM_PATH |
636 | * SET_ID -- the ID of the template set that this file belongs to |
637 | * ENGINE -- the engine needed to render this template file |
638 | * |
639 | * @static |
de4d58cb |
640 | * |
641 | */ |
d4c2aa24 |
642 | function cache_template_file_hierarchy($regenerate_cache=FALSE, |
643 | $additional_files=array()) { |
644 | |
645 | sqGetGlobalVar('template_file_hierarchy', $template_file_hierarchy, |
646 | SQ_SESSION, array()); |
647 | |
648 | |
649 | if ($regenerate_cache) unset($template_file_hierarchy); |
650 | |
d4c2aa24 |
651 | if (!empty($template_file_hierarchy)) { |
652 | |
653 | // have to add additional files if given before returning |
654 | // |
655 | if (!empty($additional_files)) { |
656 | $template_file_hierarchy = array_merge($template_file_hierarchy, |
657 | $additional_files); |
658 | sqsession_register($template_file_hierarchy, |
659 | 'template_file_hierarchy'); |
660 | } |
661 | |
662 | return $template_file_hierarchy; |
663 | } |
664 | |
665 | |
666 | // nothing in cache apparently, so go build it now |
667 | // |
668 | // FIXME: not sure if there is any possibility that |
669 | // this could be called when $sTemplateID has |
670 | // yet to be defined... throw error for now, |
671 | // but if the error occurs, it's a coding error |
672 | // rather than a configuration error |
673 | // |
674 | global $sTemplateID; |
675 | if (empty($sTemplateID)) { |
676 | |
677 | trigger_error('Template set ID unknown', E_USER_ERROR); |
678 | |
679 | } else { |
680 | |
681 | $template_file_hierarchy = Template::catalog_template_files($sTemplateID); |
682 | |
683 | // additional files, if any |
684 | // |
685 | if (!empty($additional_files)) { |
686 | $template_file_hierarchy = array_merge($template_file_hierarchy, |
687 | $additional_files); |
688 | } |
689 | |
690 | sqsession_register($template_file_hierarchy, |
691 | 'template_file_hierarchy'); |
692 | |
693 | return $template_file_hierarchy; |
694 | |
695 | } |
696 | |
697 | } |
698 | |
699 | /** |
700 | * Traverse template hierarchy and catalogue all template |
701 | * files (for storing in cache). |
702 | * |
703 | * Paths to all files in all parent, grand-parent, great grand |
704 | * parent, etc. template sets (including the fallback template) |
705 | * are catalogued; for identically named files, the file earlier |
706 | * in the hierarchy (closest to this template set) is used. |
707 | * |
708 | * @param string $template_set_id The template set in which to |
709 | * search for files |
710 | * @param array $file_list The file list so far to be added |
711 | * to (allows recursive behavior) |
712 | * (optional; default empty array). |
713 | * @param string $directory The directory in which to search for |
714 | * files (must be given as full path). |
715 | * If empty, starts at top-level template |
716 | * set directory (optional; default empty). |
717 | * NOTE! Use with care, as behavior is |
718 | * unpredictable if directory given is not |
719 | * part of correct template set. |
720 | * |
721 | * @return mixed The top-level caller will have an array of template |
722 | * files returned to it; recursive calls to this function |
723 | * do not receive any return value at all. The format |
724 | * of the template file array is as described for the |
725 | * Template class attribute $template_file_cache |
726 | * |
727 | * @static |
728 | * |
729 | */ |
730 | function catalog_template_files($template_set_id, $file_list=array(), $directory='') { |
731 | |
732 | $template_base_dir = SM_PATH |
733 | . Template::calculate_template_file_directory($template_set_id); |
734 | |
735 | if (empty($directory)) { |
736 | $directory = $template_base_dir; |
737 | } |
738 | |
739 | $files_and_dirs = list_files($directory, '', FALSE, TRUE, FALSE, TRUE); |
de4d58cb |
740 | |
d4c2aa24 |
741 | // recurse for all the subdirectories in the template set |
742 | // |
743 | foreach ($files_and_dirs['DIRECTORIES'] as $dir) { |
744 | $file_list = Template::catalog_template_files($template_set_id, $file_list, $dir); |
745 | } |
746 | |
747 | // place all found files in the cache |
748 | // FIXME: assuming PHP template engine may not necessarily be a good thing |
749 | // |
750 | $engine = Template::get_template_config($template_set_id, |
751 | 'template_engine', SQ_PHP_TEMPLATE); |
752 | foreach ($files_and_dirs['FILES'] as $file) { |
753 | |
754 | // remove the part of the file path corresponding to the |
755 | // template set's base directory |
756 | // |
757 | $relative_file = substr($file, strlen($template_base_dir)); |
758 | |
948be6d4 |
759 | /** |
760 | * only put file in cache if not already found in earlier template |
761 | * PATH should be relative to SquirrelMail top directory |
762 | */ |
d4c2aa24 |
763 | if (!isset($file_list[$relative_file])) { |
764 | $file_list[$relative_file] = array( |
948be6d4 |
765 | 'PATH' => substr($file,strlen(SM_PATH)), |
d4c2aa24 |
766 | 'SET_ID' => $template_set_id, |
767 | 'ENGINE' => $engine, |
768 | ); |
769 | } |
770 | |
771 | } |
772 | |
773 | |
774 | // now if we are currently at the top-level of the template |
775 | // set base directory, we need to move on to the parent |
776 | // template set, if any |
777 | // |
778 | if ($directory == $template_base_dir) { |
779 | |
780 | // use fallback when we run out of parents |
781 | // |
782 | $fallback_id = Template::get_fallback_template_set(); |
783 | $parent_id = Template::get_template_config($template_set_id, |
784 | 'parent_template_set', |
785 | $fallback_id); |
786 | |
787 | // were we already all the way to the last level? just exit |
788 | // |
789 | // note that this code allows the fallback set to have |
790 | // a parent, too, but can result in endless loops |
791 | // if ($parent_id == $template_set_id) { |
792 | // |
793 | if ($fallback_id == $template_set_id) { |
794 | return $file_list; |
795 | } |
796 | |
797 | $file_list = Template::catalog_template_files($parent_id, $file_list); |
798 | |
799 | } |
800 | |
801 | return $file_list; |
de4d58cb |
802 | |
803 | } |
804 | |
d4c2aa24 |
805 | /** |
806 | * Look for a template file in a plugin; add to template |
807 | * file cache if found. |
808 | * |
809 | * The file is searched for in the following order: |
810 | * |
811 | * - A directory for the current template set within the plugin: |
812 | * SM_PATH/plugins/<plugin name>/templates/<template name>/ |
813 | * - In a directory for one of the current template set's ancestor |
814 | * (inherited) template sets within the plugin: |
815 | * SM_PATH/plugins/<plugin name>/templates/<parent template name>/ |
816 | * - In a directory for the fallback template set within the plugin: |
817 | * SM_PATH/plugins/<plugin name>/templates/<fallback template name>/ |
818 | * |
819 | * @param string $plugin The name of the plugin |
820 | * @param string $file The name of the template file |
821 | * @param string $template_set_id The ID of the template for which |
822 | * to start looking for the file |
823 | * (optional; default is current |
824 | * template set ID). |
825 | * |
826 | * @return boolean TRUE if the template file was found, FALSE otherwise. |
827 | * |
828 | */ |
829 | function find_and_cache_plugin_template_file($plugin, $file, $template_set_id='') { |
830 | |
831 | if (empty($template_set_id)) |
832 | $template_set_id = $this->template_set_id; |
833 | |
834 | $file_path = SM_PATH . 'plugins/' . $plugin . '/' |
835 | . $this->calculate_template_file_directory($template_set_id) |
836 | . $file; |
837 | |
838 | if (file_exists($file_path)) { |
839 | // FIXME: assuming PHP template engine may not necessarily be a good thing |
840 | $engine = $this->get_template_config($template_set_id, |
841 | 'template_engine', SQ_PHP_TEMPLATE); |
842 | $file_list = array('plugins/' . $plugin . '/' . $file => array( |
eb2425ec |
843 | 'PATH' => substr($file_path, strlen(SM_PATH)), |
844 | 'SET_ID' => $template_set_id, |
845 | 'ENGINE' => $engine, |
d4c2aa24 |
846 | ) |
847 | ); |
848 | $this->template_file_cache |
849 | = $this->cache_template_file_hierarchy(FALSE, $file_list); |
850 | return TRUE; |
851 | } |
852 | |
853 | |
854 | // not found yet, try parent template set |
855 | // (use fallback when we run out of parents) |
856 | // |
857 | $fallback_id = $this->get_fallback_template_set(); |
858 | $parent_id = $this->get_template_config($template_set_id, |
859 | 'parent_template_set', |
860 | $fallback_id); |
861 | |
862 | // were we already all the way to the last level? just exit |
863 | // |
864 | // note that this code allows the fallback set to have |
865 | // a parent, too, but can result in endless loops |
866 | // if ($parent_id == $template_set_id) { |
867 | // |
868 | if ($fallback_id == $template_set_id) { |
869 | return FALSE; |
870 | } |
871 | |
872 | return $this->find_and_cache_plugin_template_file($plugin, $file, $parent_id); |
873 | |
874 | } |
de4d58cb |
875 | |
876 | /** |
877 | * Find the right template file. |
878 | * |
d4c2aa24 |
879 | * The template file is taken from the template file cache, thus |
880 | * the file is taken from the current template, one of its |
881 | * ancestors or the fallback template. |
882 | * |
883 | * Note that it is perfectly acceptable to load template files from |
884 | * template subdirectories. For example, JavaScript templates found |
885 | * in the js/ subdirectory would be loaded by passing |
886 | * "js/<javascript file name>" as the $filename. |
887 | * |
888 | * Note that the caller can also ask for ALL files in a directory |
889 | * (and those in the same directory for all ancestor template sets) |
890 | * by giving a $filename that is a directory name (ending with a |
891 | * slash). |
892 | * |
893 | * If not found and the file is a plugin template file (indicated |
894 | * by the presence of "plugins/" on the beginning of $filename), |
895 | * the target plugin is searched for a substitue template file |
896 | * before just returning nothing. |
de4d58cb |
897 | * |
898 | * Plugin authors must note that the $filename MUST be prefaced |
899 | * with "plugins/<plugin name>/" in order to correctly resolve the |
900 | * template file. |
901 | * |
de4d58cb |
902 | * @param string $filename The name of the template file, |
903 | * possibly prefaced with |
904 | * "plugins/<plugin name>/" |
905 | * indicating that it is a plugin |
d4c2aa24 |
906 | * template, or ending with a |
907 | * slash, indicating that all files |
908 | * for that directory name should |
909 | * be returned. |
e5d57179 |
910 | * @param boolean $directories_ok When TRUE, directory names |
911 | * are acceptable search values, |
912 | * and when returning a list of |
913 | * directory contents, sub-directory |
914 | * names will also be included |
915 | * (optional; default FALSE). |
916 | * NOTE that empty directories |
917 | * are NOT included in the cache! |
918 | * @param boolean $directories_only When TRUE, only directory names |
919 | * are included in the returned |
920 | * results. (optional; default |
921 | * FALSE). Setting this argument |
922 | * to TRUE forces $directories_ok |
923 | * to TRUE as well. |
924 | * NOTE that empty directories |
925 | * are NOT included in the cache! |
d4c2aa24 |
926 | * |
927 | * @return mixed The full path to the template file or a list |
928 | * of all files in the given directory if $filename |
929 | * ends with a slash; if not found, an empty string |
930 | * is returned. The caller is responsible for |
931 | * throwing errors or other actions if template |
932 | * file is not found. |
de4d58cb |
933 | * |
934 | */ |
e5d57179 |
935 | function get_template_file_path($filename, |
936 | $directories_ok=FALSE, |
937 | $directories_only=FALSE) { |
de4d58cb |
938 | |
e5d57179 |
939 | if ($directories_only) $directories_ok = TRUE; |
940 | |
941 | |
942 | // only looking for directory listing first... |
943 | // |
d4c2aa24 |
944 | // return list of all files in a directory (and that |
945 | // of any ancestors) |
de4d58cb |
946 | // |
d4c2aa24 |
947 | if ($filename{strlen($filename) - 1} == '/') { |
948 | |
949 | $return_array = array(); |
950 | foreach ($this->template_file_cache as $file => $file_info) { |
951 | |
952 | // only want files in the requested directory |
953 | // (AND not in a subdirectory!) |
954 | // |
e5d57179 |
955 | if (!$directories_only && strpos($file, $filename) === 0 |
d4c2aa24 |
956 | && strpos($file, '/', strlen($filename)) === FALSE) |
948be6d4 |
957 | $return_array[] = SM_PATH . $file_info['PATH']; |
de4d58cb |
958 | |
e5d57179 |
959 | // directories too? detect by finding any |
960 | // array key that matches a file in a sub-directory |
961 | // of the directory being processed |
962 | // |
963 | if ($directories_ok && strpos($file, $filename) === 0 |
964 | && ($pos = strpos($file, '/', strlen($filename))) !== FALSE |
965 | && strpos($file, '/', $pos + 1) === FALSE) { |
966 | $directory_name = SM_PATH |
967 | . substr($file_info['PATH'], |
968 | 0, |
969 | strrpos($file_info['PATH'], '/')); |
970 | if (!in_array($directory_name, $return_array)) |
971 | $return_array[] = $directory_name; |
972 | } |
973 | |
d4c2aa24 |
974 | } |
975 | return $return_array; |
976 | |
977 | } |
978 | |
e5d57179 |
979 | |
980 | // just looking for singular file or directory below... |
981 | // |
d4c2aa24 |
982 | // figure out what to do with files not found |
983 | // |
e5d57179 |
984 | if ($directories_only || empty($this->template_file_cache[$filename]['PATH'])) { |
985 | |
986 | // if looking for directories... |
987 | // have to iterate through cache and detect |
988 | // directory by matching any file inside of it |
989 | // |
990 | if ($directories_ok) { |
991 | foreach ($this->template_file_cache as $file => $file_info) { |
992 | if (strpos($file, $filename) === 0 |
993 | && ($pos = strpos($file, '/', strlen($filename))) !== FALSE |
994 | && strpos($file, '/', $pos + 1) === FALSE) { |
995 | return SM_PATH . substr($file_info['PATH'], |
996 | 0, |
997 | strrpos($file_info['PATH'], '/')); |
998 | } |
999 | } |
1000 | |
1001 | if ($directories_only) return ''; |
1002 | } |
d4c2aa24 |
1003 | |
e5d57179 |
1004 | // plugins get one more chance |
de4d58cb |
1005 | // |
e5d57179 |
1006 | if (strpos($filename, 'plugins/') === 0) { |
1007 | |
1008 | $plugin_name = substr($filename, 8, strpos($filename, '/', 8) - 8); |
1009 | $file = substr($filename, strlen($plugin_name) + 9); |
1010 | |
1011 | if (!$this->find_and_cache_plugin_template_file($plugin_name, $file)) |
1012 | return ''; |
1013 | //FIXME: technically I guess we should check for directories |
1014 | // here too, but that's overkill (no need) presently |
1015 | // (plugin-provided alternate stylesheet dirs?!? bah.) |
de4d58cb |
1016 | |
e5d57179 |
1017 | } |
de4d58cb |
1018 | |
e5d57179 |
1019 | // nothing... return empty string (yes, the else is intentional!) |
1020 | // |
1021 | else return ''; |
de4d58cb |
1022 | |
d4c2aa24 |
1023 | } |
de4d58cb |
1024 | |
948be6d4 |
1025 | return SM_PATH . $this->template_file_cache[$filename]['PATH']; |
de4d58cb |
1026 | |
d4c2aa24 |
1027 | } |
de4d58cb |
1028 | |
d4c2aa24 |
1029 | /** |
1030 | * Get template engine needed to render given template file. |
1031 | * |
1032 | * If at all possible, just returns a reference to $this, but |
1033 | * some template files may require a different engine, thus |
1034 | * an object for that engine (which will subsequently be kept |
1035 | * in this object for future use) is returned. |
1036 | * |
1037 | * @param string $filename The name of the template file, |
1038 | * |
1039 | * @return object The needed template object to render the template. |
1040 | * |
1041 | */ |
1042 | function get_rendering_template_engine_object($filename) { |
1043 | |
1044 | // for files that we cannot find engine info for, |
1045 | // just return $this |
1046 | // |
1047 | if (empty($this->template_file_cache[$filename]['ENGINE'])) |
1048 | return $this; |
1049 | |
1050 | |
1051 | // otherwise, compare $this' engine to the file's engine |
1052 | // |
1053 | $engine = $this->template_file_cache[$filename]['ENGINE']; |
1054 | if ($this->template_engine == $engine) |
1055 | return $this; |
1056 | |
1057 | |
1058 | // need to load another engine... if already instantiated, |
1059 | // and stored herein, return that |
1060 | // FIXME: this assumes same engine setup in all template |
1061 | // set config files that have same engine in common |
1062 | // (but keeping a separate class object for every |
1063 | // template set seems like overkill... for now we |
1064 | // won't do that unless it becomes a problem) |
1065 | // |
1066 | if (!empty($this->other_template_engine_objects[$engine])) { |
1067 | $rendering_engine = $this->other_template_engine_objects[$engine]; |
de4d58cb |
1068 | |
de4d58cb |
1069 | |
d4c2aa24 |
1070 | // otherwise, instantiate new engine object, add to cache |
1071 | // and return it |
1072 | // |
1073 | } else { |
1074 | $template_set_id = $this->template_file_cache[$filename]['SET_ID']; |
1075 | $this->other_template_engine_objects[$engine] |
1076 | = $this->get_template_engine_subclass($template_set_id); |
1077 | $rendering_engine = $this->other_template_engine_objects[$engine]; |
1078 | } |
de4d58cb |
1079 | |
de4d58cb |
1080 | |
d4c2aa24 |
1081 | // now, need to copy over all the assigned variables |
1082 | // from $this to the rendering engine (YUCK! -- we need |
1083 | // to discourage template authors from creating |
1084 | // situations where engine changes occur) |
1085 | // |
1086 | $rendering_engine->clear_all_assign(); |
1087 | $rendering_engine->assign($this->get_template_vars()); |
de4d58cb |
1088 | |
de4d58cb |
1089 | |
d4c2aa24 |
1090 | // finally ready to go |
1091 | // |
1092 | return $rendering_engine; |
de4d58cb |
1093 | |
d4c2aa24 |
1094 | } |
de4d58cb |
1095 | |
d4c2aa24 |
1096 | /** |
1097 | * Return all JavaScript files provided by the template. |
1098 | * |
1099 | * All files found in the template set's "js" directory (and |
1100 | * that of its ancestors) with the extension ".js" are returned. |
1101 | * |
1102 | * @param boolean $full_path When FALSE, only the file names |
1103 | * are included in the return array; |
1104 | * otherwise, path information is |
1105 | * included (relative to SM_PATH) |
1106 | * (OPTIONAL; default only file names) |
1107 | * |
1108 | * @return array The required file names/paths. |
1109 | * |
1110 | */ |
1111 | function get_javascript_includes($full_path=FALSE) { |
de4d58cb |
1112 | |
d4c2aa24 |
1113 | // since any page from a parent template set |
1114 | // could end up being loaded, we have to load |
1115 | // all js files from ancestor template sets, |
1116 | // not just this set |
1117 | // |
1118 | //$directory = SM_PATH . $this->get_template_file_directory() . 'js'; |
1119 | //$js_files = list_files($directory, '.js', !$full_path); |
1120 | // |
1121 | $js_files = $this->get_template_file_path('js/'); |
1122 | |
1123 | |
1124 | // parse out .js files only |
1125 | // |
1126 | $return_array = array(); |
1127 | foreach ($js_files as $file) { |
1128 | |
1129 | if (substr($file, strlen($file) - 3) != '.js') continue; |
de4d58cb |
1130 | |
d4c2aa24 |
1131 | if ($full_path) { |
1132 | $return_array[] = $file; |
1133 | } else { |
1134 | $return_array[] = basename($file); |
de4d58cb |
1135 | } |
1136 | |
1137 | } |
1138 | |
d4c2aa24 |
1139 | return $return_array; |
de4d58cb |
1140 | |
1141 | } |
1142 | |
1143 | /** |
d4c2aa24 |
1144 | * Return all alternate stylesheets provided by template. |
1145 | * |
e5d57179 |
1146 | * All (non-empty) directories found in the template set's |
1147 | * "css/alternates" directory (and that of its ancestors) |
1148 | * are returned. |
d4c2aa24 |
1149 | * |
1150 | * Note that prettified names are constructed herein by |
e5d57179 |
1151 | * taking the directory name, changing underscores to spaces |
1152 | * and capitalizing each word in the resultant name. |
de4d58cb |
1153 | * |
1154 | * @param boolean $full_path When FALSE, only the file names |
1155 | * are included in the return array; |
1156 | * otherwise, path information is |
1157 | * included (relative to SM_PATH) |
1158 | * (OPTIONAL; default only file names) |
1159 | * |
d4c2aa24 |
1160 | * @return array A list of the available alternate stylesheets, |
1161 | * where the keys are the file names (formatted |
1162 | * according to $full_path) for the stylesheets, |
1163 | * and the values are the prettified version of |
1164 | * the file names for display to the user. |
1165 | * |
de4d58cb |
1166 | */ |
d4c2aa24 |
1167 | function get_alternative_stylesheets($full_path=FALSE) { |
de4d58cb |
1168 | |
d4c2aa24 |
1169 | // since any page from a parent template set |
1170 | // could end up being loaded, we will load |
1171 | // all alternate css files from ancestor |
1172 | // template sets, not just this set |
1173 | // |
e5d57179 |
1174 | $css_directories = $this->get_template_file_path('css/alternates/', TRUE, TRUE); |
d4c2aa24 |
1175 | |
1176 | |
e5d57179 |
1177 | // prettify names |
d4c2aa24 |
1178 | // |
1179 | $return_array = array(); |
e5d57179 |
1180 | foreach ($css_directories as $directory) { |
d4c2aa24 |
1181 | |
e5d57179 |
1182 | // CVS directories are not wanted |
1183 | // |
1184 | if (strpos($directory, '/CVS') === strlen($directory) - 4) continue; |
d4c2aa24 |
1185 | |
e5d57179 |
1186 | $pretty_name = ucwords(str_replace('_', ' ', basename($directory))); |
d4c2aa24 |
1187 | |
1188 | if ($full_path) { |
e5d57179 |
1189 | $return_array[$directory] = $pretty_name; |
d4c2aa24 |
1190 | } else { |
e5d57179 |
1191 | $return_array[basename($directory)] = $pretty_name; |
de4d58cb |
1192 | } |
d4c2aa24 |
1193 | |
de4d58cb |
1194 | } |
1195 | |
d4c2aa24 |
1196 | return $return_array; |
de4d58cb |
1197 | |
1198 | } |
1199 | |
1200 | /** |
1201 | * Return all standard stylsheets provided by the template. |
1202 | * |
d4c2aa24 |
1203 | * All files found in the template set's "css" directory (and |
1204 | * that of its ancestors) with the extension ".css" except |
1205 | * "rtl.css" (which is dealt with separately) are returned. |
de4d58cb |
1206 | * |
1207 | * @param boolean $full_path When FALSE, only the file names |
1208 | * are included in the return array; |
1209 | * otherwise, path information is |
1210 | * included (relative to SM_PATH) |
1211 | * (OPTIONAL; default only file names) |
1212 | * |
1213 | * @return array The required file names/paths. |
1214 | * |
1215 | */ |
1216 | function get_stylesheets($full_path=FALSE) { |
1217 | |
d4c2aa24 |
1218 | // since any page from a parent template set |
1219 | // could end up being loaded, we have to load |
1220 | // all css files from ancestor template sets, |
1221 | // not just this set |
1222 | // |
1223 | //$directory = SM_PATH . $this->get_template_file_directory() . 'css'; |
1224 | //$css_files = list_files($directory, '.css', !$full_path); |
1225 | // |
1226 | $css_files = $this->get_template_file_path('css/'); |
1227 | |
de4d58cb |
1228 | |
1229 | // need to leave out "rtl.css" |
d4c2aa24 |
1230 | // |
de4d58cb |
1231 | $return_array = array(); |
d4c2aa24 |
1232 | foreach ($css_files as $file) { |
de4d58cb |
1233 | |
d4c2aa24 |
1234 | if (substr($file, strlen($file) - 4) != '.css') continue; |
1235 | if (strtolower(basename($file)) == 'rtl.css') continue; |
de4d58cb |
1236 | |
d4c2aa24 |
1237 | if ($full_path) { |
1238 | $return_array[] = $file; |
1239 | } else { |
1240 | $return_array[] = basename($file); |
1241 | } |
de4d58cb |
1242 | |
1243 | } |
1244 | |
c404d448 |
1245 | |
1246 | // return sheets for the current template set |
1247 | // last so we can enable any custom overrides |
1248 | // of styles in ancestor sheets |
1249 | // |
1250 | return array_reverse($return_array); |
de4d58cb |
1251 | |
1252 | } |
1253 | |
1254 | /** |
1255 | * Generate links to all this template set's standard stylesheets |
1256 | * |
1257 | * Subclasses can override this function if stylesheets are |
1258 | * created differently for the template set's target output |
1259 | * interface. |
1260 | * |
1261 | * @return string The stylesheet links as they should be sent |
1262 | * to the browser. |
1263 | * |
1264 | */ |
1265 | function fetch_standard_stylesheet_links() |
1266 | { |
1267 | |
1268 | $sheets = $this->get_stylesheets(TRUE); |
1269 | return $this->fetch_external_stylesheet_links($sheets); |
1270 | |
1271 | } |
1272 | |
1273 | /** |
1274 | * Push out any other stylesheet links as provided (for |
1275 | * stylesheets not included with the current template set) |
1276 | * |
1277 | * Subclasses can override this function if stylesheets are |
1278 | * created differently for the template set's target output |
1279 | * interface. |
1280 | * |
1281 | * @param mixed $sheets List of the desired stylesheets |
1282 | * (file path to be used in stylesheet |
1283 | * href attribute) to output (or single |
1284 | * stylesheet file path). |
1285 | FIXME: We could make the incoming array more complex so it can |
1286 | also contain the other parameters for create_css_link() |
1287 | such as $name, $alt, $mtype, and $xhtml_end |
1288 | But do we need to? |
1289 | * |
1290 | * @return string The stylesheet links as they should be sent |
1291 | * to the browser. |
1292 | * |
1293 | */ |
1294 | function fetch_external_stylesheet_links($sheets) |
1295 | { |
1296 | |
1297 | if (!is_array($sheets)) $sheets = array($sheets); |
1298 | $output = ''; |
1299 | |
1300 | foreach ($sheets as $sheet) { |
1301 | $output .= create_css_link($sheet); |
1302 | } |
1303 | |
1304 | return $output; |
1305 | |
1306 | } |
1307 | |
1308 | /** |
1309 | * Send HTTP header(s) to browser. |
1310 | * |
1311 | * Subclasses can override this function if headers are |
1312 | * managed differently in the template set's target output |
1313 | * interface. |
1314 | * |
1315 | * @param mixed $headers A list of (or a single) header |
1316 | * text to be sent. |
1317 | * |
1318 | */ |
1319 | function header($headers) |
1320 | { |
1321 | |
1322 | if (!is_array($headers)) $headers = array($headers); |
1323 | |
1324 | foreach ($headers as $header) { |
1325 | header($header); |
1326 | } |
1327 | |
1328 | } |
1329 | |
1330 | /** |
1331 | * Generate a link to the right-to-left stylesheet for |
d4c2aa24 |
1332 | * this template set by getting the "rtl.css" file from |
1333 | * this template set, its parent (or grandparent, etc.) |
1334 | * template set, the fall-back template set, or finally, |
1335 | * fall back to SquirrelMail's own "rtl.css" if need be. |
de4d58cb |
1336 | * |
1337 | * Subclasses can override this function if stylesheets are |
1338 | * created differently for the template set's target output |
1339 | * interface. |
1340 | * |
1341 | * @return string The stylesheet link as it should be sent |
1342 | * to the browser. |
1343 | * |
1344 | */ |
1345 | function fetch_right_to_left_stylesheet_link() |
1346 | { |
1347 | |
1348 | // get right template file |
1349 | // |
1350 | $sheet = $this->get_template_file_path('css/rtl.css'); |
1351 | |
1352 | // fall back to SquirrelMail's own default stylesheet |
1353 | // |
1354 | if (empty($sheet)) { |
1355 | $sheet = SM_PATH . 'css/rtl.css'; |
1356 | } |
1357 | |
1358 | return create_css_link($sheet); |
1359 | |
1360 | } |
1361 | |
1362 | /** |
1363 | * Display the template |
1364 | * |
1365 | * @param string $file The template file to use |
1366 | * |
1367 | */ |
1368 | function display($file) |
1369 | { |
1370 | |
1371 | echo $this->fetch($file); |
1372 | |
1373 | } |
1374 | |
1375 | /** |
1376 | * Applies the template and returns the resultant content string. |
1377 | * |
1378 | * @param string $file The template file to use |
1379 | * |
1380 | * @return string The template contents after applying the given template |
1381 | * |
1382 | */ |
1383 | function fetch($file) { |
1384 | |
1385 | // get right template file |
1386 | // |
1387 | $template = $this->get_template_file_path($file); |
1388 | |
d4c2aa24 |
1389 | |
de4d58cb |
1390 | // special case stylesheet.tpl falls back to SquirrelMail's |
1391 | // own default stylesheet |
1392 | // |
1393 | if (empty($template) && $file == 'css/stylesheet.tpl') { |
1394 | $template = SM_PATH . 'css/default.css'; |
1395 | } |
1396 | |
d4c2aa24 |
1397 | |
de4d58cb |
1398 | if (empty($template)) { |
1399 | |
1400 | trigger_error('The template "' . htmlspecialchars($file) |
1401 | . '" could not be fetched!', E_USER_ERROR); |
1402 | |
1403 | } else { |
1404 | |
1405 | $aPluginOutput = array(); |
1406 | $aPluginOutput = concat_hook_function('template_construct_' . $file, |
d849b570 |
1407 | $temp=array(&$aPluginOutput, &$this)); |
de4d58cb |
1408 | $this->assign('plugin_output', $aPluginOutput); |
1409 | |
d4c2aa24 |
1410 | //$output = $this->apply_template($template); |
1411 | $rendering_engine = $this->get_rendering_template_engine_object($file); |
1412 | $output = $rendering_engine->apply_template($template); |
de4d58cb |
1413 | |
1414 | // CAUTION: USE OF THIS HOOK IS HIGHLY DISCOURAGED AND CAN |
1415 | // RESULT IN NOTICABLE PERFORMANCE DEGREDATION. Plugins |
1416 | // using this hook will probably be rejected by the |
1417 | // SquirrelMail team. |
1418 | // |
d849b570 |
1419 | do_hook('template_output', $output); |
de4d58cb |
1420 | |
1421 | return $output; |
1422 | |
1423 | } |
1424 | |
1425 | } |
1426 | |
1427 | /** |
1428 | * Assigns values to template variables |
1429 | * |
1430 | * Note: this is an abstract method that must be implemented by subclass. |
1431 | * |
1432 | * @param array|string $tpl_var the template variable name(s) |
1433 | * @param mixed $value the value to assign |
1434 | * |
1435 | */ |
1436 | function assign($tpl_var, $value = NULL) { |
1437 | |
1438 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the assign() method.', E_USER_ERROR); |
1439 | |
1440 | } |
1441 | |
1442 | /** |
1443 | * Assigns values to template variables by reference |
1444 | * |
1445 | * Note: this is an abstract method that must be implemented by subclass. |
1446 | * |
1447 | * @param string $tpl_var the template variable name |
1448 | * @param mixed $value the referenced value to assign |
1449 | * |
1450 | */ |
1451 | function assign_by_ref($tpl_var, &$value) { |
1452 | |
1453 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the assign_by_ref() method.', E_USER_ERROR); |
1454 | |
1455 | } |
1456 | |
d4c2aa24 |
1457 | /** |
1458 | * Clears the values of all assigned varaiables. |
1459 | * |
1460 | */ |
1461 | function clear_all_assign() { |
1462 | |
1463 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the clear_all_assign() method.', E_USER_ERROR); |
1464 | |
1465 | } |
1466 | |
1467 | /** |
1468 | * Returns assigned variable value(s). |
1469 | * |
1470 | * @param string $varname If given, the value of that variable |
1471 | * is returned, assuming it has been |
1472 | * previously assigned. If not specified |
1473 | * an array of all assigned variables is |
1474 | * returned. (optional) |
1475 | * |
1476 | * @return mixed Desired single variable value or list of all |
1477 | * assigned variable values. |
1478 | * |
1479 | */ |
1480 | function get_template_vars($varname=NULL) { |
1481 | |
1482 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the get_template_vars() method.', E_USER_ERROR); |
1483 | |
1484 | } |
1485 | |
de4d58cb |
1486 | /** |
1487 | * Appends values to template variables |
1488 | * |
1489 | * Note: this is an abstract method that must be implemented by subclass. |
1490 | * |
1491 | * @param array|string $tpl_var the template variable name(s) |
1492 | * @param mixed $value the value to append |
1493 | * @param boolean $merge when $value is given as an array, |
1494 | * this indicates whether or not that |
1495 | * array itself should be appended as |
1496 | * a new template variable value or if |
1497 | * that array's values should be merged |
1498 | * into the existing array of template |
1499 | * variable values |
1500 | * |
1501 | */ |
1502 | function append($tpl_var, $value = NULL, $merge = FALSE) { |
1503 | |
1504 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the append() method.', E_USER_ERROR); |
1505 | |
1506 | } |
1507 | |
1508 | /** |
1509 | * Appends values to template variables by reference |
1510 | * |
1511 | * Note: this is an abstract method that must be implemented by subclass. |
1512 | * |
1513 | * @param string $tpl_var the template variable name |
1514 | * @param mixed $value the referenced value to append |
1515 | * @param boolean $merge when $value is given as an array, |
1516 | * this indicates whether or not that |
1517 | * array itself should be appended as |
1518 | * a new template variable value or if |
1519 | * that array's values should be merged |
1520 | * into the existing array of template |
1521 | * variable values |
1522 | * |
1523 | */ |
1524 | function append_by_ref($tpl_var, &$value, $merge = FALSE) { |
1525 | |
1526 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the append_by_ref() method.', E_USER_ERROR); |
1527 | |
1528 | } |
1529 | |
1530 | /** |
1531 | * Applys the template and generates final output destined |
1532 | * for the user's browser |
1533 | * |
1534 | * Note: this is an abstract method that must be implemented by subclass. |
1535 | * |
1536 | * @param string $filepath The full file path to the template to be applied |
1537 | * |
1538 | * @return string The output for the given template |
1539 | * |
1540 | */ |
1541 | function apply_template($filepath) { |
1542 | |
1543 | trigger_error('Template subclass (' . $this->template_engine . 'Template.class.php) needs to implement the apply_template() method.', E_USER_ERROR); |
1544 | |
1545 | } |
1546 | |
1547 | } |
1548 | |