CRM/Core/Resources.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.5                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2014                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
   9  |                                                                    |
  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  16  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  17  | See the GNU Affero General Public License for more details.        |
  18  |                                                                    |
  19  | You should have received a copy of the GNU Affero General Public   |
  20  | License and the CiviCRM Licensing Exception along                  |
  21  | with this program; if not, contact CiviCRM LLC                     |
  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
  23  | GNU Affero General Public License or the licensing of CiviCRM,     |
  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  25  +--------------------------------------------------------------------+
  26 */
  27
  28 /**
  29  * This class facilitates the loading of resources
  30  * such as JavaScript files and CSS files.
  31  *
  32  * Any URLs generated for resources may include a 'cache-code'. By resetting the
  33  * cache-code, one may force clients to re-download resource files (regardless of
  34  * any HTTP caching rules).
  35  *
  36  * TODO: This is currently a thin wrapper over CRM_Core_Region. We
  37  * should incorporte services for aggregation, minimization, etc.
  38  *
  39  * @package CRM
  40  * @copyright CiviCRM LLC (c) 2004-2014
  41  * $Id$
  42  *
  43  */
  44 class CRM_Core_Resources {
  45   const DEFAULT_WEIGHT = 0;
  46   const DEFAULT_REGION = 'page-footer';
  47
  48   /**
  49    * We don't have a container or dependency-injection, so use singleton instead
  50    *
  51    * @var object
  52    * @static
  53    */
  54   private static $_singleton = NULL;
  55
  56   /**
  57    * @var CRM_Extension_Mapper
  58    */
  59   private $extMapper = NULL;
  60
  61   /**
  62    * @var CRM_Utils_Cache_Interface
  63    */
  64   private $cache = NULL;
  65
  66   /**
  67    * @var array free-form data tree
  68    */
  69   protected $settings = array();
  70   protected $addedSettings = FALSE;
  71
  72   /**
  73    * @var array of callables
  74    */
  75   protected $settingsFactories = array();
  76
  77   /**
  78    * @var array ($regionName => bool)
  79    */
  80   protected $addedCoreResources = array();
  81
  82   /**
  83    * @var array ($regionName => bool)
  84    */
  85   protected $addedCoreStyles = array();
  86
  87   /**
  88    * @var string a value to append to JS/CSS URLs to coerce cache resets
  89    */
  90   protected $cacheCode = NULL;
  91
  92   /**
  93    * @var string the name of a setting which persistently stores the cacheCode
  94    */
  95   protected $cacheCodeKey = NULL;
  96
  97   /**
  98    * @var bool
  99    */
 100   public $ajaxPopupsEnabled;
 101
 102   /**
 103    * Get or set the single instance of CRM_Core_Resources
 104    *
 105    * @param $instance CRM_Core_Resources, new copy of the manager
 106    * @return CRM_Core_Resources
 107    */
 108   static public function singleton(CRM_Core_Resources $instance = NULL) {
 109     if ($instance !== NULL) {
 110       self::$_singleton = $instance;
 111     }
 112     if (self::$_singleton === NULL) {
 113       $sys = CRM_Extension_System::singleton();
 114       $cache = new CRM_Utils_Cache_SqlGroup(array(
 115         'group' => 'js-strings',
 116         'prefetch' => FALSE,
 117       ));
 118       self::$_singleton = new CRM_Core_Resources(
 119         $sys->getMapper(),
 120         $cache,
 121         CRM_Core_Config::isUpgradeMode() ? NULL : 'resCacheCode'
 122       );
 123     }
 124     return self::$_singleton;
 125   }
 126
 127   /**
 128    * Construct a resource manager
 129    *
 130    * @param CRM_Extension_Mapper $extMapper Map extension names to their base path or URLs.
 131    * @param CRM_Utils_Cache_Interface $cache JS-localization cache
 132    * @param string|null $cacheCodeKey Random code to append to resource URLs; changing the code forces clients to reload resources
 133    */
 134   public function __construct($extMapper, $cache, $cacheCodeKey = NULL) {
 135     $this->extMapper = $extMapper;
 136     $this->cache = $cache;
 137     $this->cacheCodeKey = $cacheCodeKey;
 138     if ($cacheCodeKey !== NULL) {
 139       $this->cacheCode = CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, $cacheCodeKey);
 140     }
 141     if (!$this->cacheCode) {
 142       $this->resetCacheCode();
 143     }
 144     $this->ajaxPopupsEnabled = (bool) CRM_Core_BAO_Setting::getItem(
 145       CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, 'ajaxPopupsEnabled', NULL, TRUE
 146     );
 147   }
 148
 149   /**
 150    * Add a JavaScript file to the current page using <SCRIPT SRC>.
 151    *
 152    * @param $ext string, extension name; use 'civicrm' for core
 153    * @param $file string, file path -- relative to the extension base dir
 154    * @param $weight int, relative weight within a given region
 155    * @param $region string, location within the file; 'html-header', 'page-header', 'page-footer'
 156    * @param $translate, whether to parse this file for strings enclosed in ts()
 157    *
 158    * @return CRM_Core_Resources
 159    */
 160   public function addScriptFile($ext, $file, $weight = self::DEFAULT_WEIGHT, $region = self::DEFAULT_REGION, $translate = TRUE) {
 161     if ($translate) {
 162       $this->translateScript($ext, $file);
 163     }
 164     // Look for non-minified version if we are in debug mode
 165     if (CRM_Core_Config::singleton()->debug && strpos($file, '.min.js') !== FALSE) {
 166       $nonMiniFile = str_replace('.min.js', '.js', $file);
 167       if ($this->getPath($ext, $nonMiniFile)) {
 168         $file = $nonMiniFile;
 169       }
 170     }
 171     return $this->addScriptUrl($this->getUrl($ext, $file, TRUE), $weight, $region);
 172   }
 173
 174   /**
 175    * Add a JavaScript file to the current page using <SCRIPT SRC>.
 176    *
 177    * @param $url string
 178    * @param $weight int, relative weight within a given region
 179    * @param $region string, location within the file; 'html-header', 'page-header', 'page-footer'
 180    * @return CRM_Core_Resources
 181    */
 182   public function addScriptUrl($url, $weight = self::DEFAULT_WEIGHT, $region = self::DEFAULT_REGION) {
 183     CRM_Core_Region::instance($region)->add(array(
 184       'name' => $url,
 185       'type' => 'scriptUrl',
 186       'scriptUrl' => $url,
 187       'weight' => $weight,
 188       'region' => $region,
 189     ));
 190     return $this;
 191   }
 192
 193   /**
 194    * Add a JavaScript file to the current page using <SCRIPT SRC>.
 195    *
 196    * @param $code string, JavaScript source code
 197    * @param $weight int, relative weight within a given region
 198    * @param $region string, location within the file; 'html-header', 'page-header', 'page-footer'
 199    * @return CRM_Core_Resources
 200    */
 201   public function addScript($code, $weight = self::DEFAULT_WEIGHT, $region = self::DEFAULT_REGION) {
 202     CRM_Core_Region::instance($region)->add(array(
 203       // 'name' => automatic
 204       'type' => 'script',
 205       'script' => $code,
 206       'weight' => $weight,
 207       'region' => $region,
 208     ));
 209     return $this;
 210   }
 211
 212   /**
 213    * Add JavaScript variables to CRM.vars
 214    *
 215    * Example:
 216    * From the server:
 217    * CRM_Core_Resources::singleton()->addVars('myNamespace', array('foo' => 'bar'));
 218    * Access var from javascript:
 219    * CRM.vars.myNamespace.foo // "bar"
 220    *
 221    * @see http://wiki.civicrm.org/confluence/display/CRMDOC/Javascript+Reference
 222    *
 223    * @param string $nameSpace - usually the name of your extension
 224    * @param array $vars
 225    * @return CRM_Core_Resources
 226    */
 227   public function addVars($nameSpace, $vars) {
 228     $existing = CRM_Utils_Array::value($nameSpace, CRM_Utils_Array::value('vars', $this->settings), array());
 229     $vars = $this->mergeSettings($existing, $vars);
 230     $this->addSetting(array('vars' => array($nameSpace => $vars)));
 231     return $this;
 232   }
 233
 234   /**
 235    * Add JavaScript variables to the root of the CRM object.
 236    * This function is usually reserved for low-level system use.
 237    * Extensions and components should generally use addVars instead.
 238    *
 239    * @param $settings array
 240    * @return CRM_Core_Resources
 241    */
 242   public function addSetting($settings) {
 243     $this->settings = $this->mergeSettings($this->settings, $settings);
 244     if (!$this->addedSettings) {
 245       $region = self::isAjaxMode() ? 'ajax-snippet' : 'html-header';
 246       $resources = $this;
 247       CRM_Core_Region::instance($region)->add(array(
 248         'callback' => function(&$snippet, &$html) use ($resources) {
 249           $html .= "\n" . $resources->renderSetting();
 250         },
 251         'weight' => -100000,
 252       ));
 253       $this->addedSettings = TRUE;
 254     }
 255     return $this;
 256   }
 257
 258   /**
 259    * Add JavaScript variables to the global CRM object via a callback function.
 260    *
 261    * @param callable $callable
 262    * @return CRM_Core_Resources
 263    */
 264   public function addSettingsFactory($callable) {
 265     // Make sure our callback has been registered
 266     $this->addSetting(array());
 267     $this->settingsFactories[] = $callable;
 268     return $this;
 269   }
 270
 271   /**
 272    * Helper fn for addSettingsFactory
 273    */
 274   public function getSettings() {
 275     $result = $this->settings;
 276     foreach ($this->settingsFactories as $callable) {
 277       $result = $this->mergeSettings($result, $callable());
 278     }
 279     return $result;
 280   }
 281
 282   /**
 283    * @param array $settings
 284    * @param array $additions
 285    * @return array combination of $settings and $additions
 286    */
 287   protected function mergeSettings($settings, $additions) {
 288     foreach ($additions as $k => $v) {
 289       if (isset($settings[$k]) && is_array($settings[$k]) && is_array($v)) {
 290         $v += $settings[$k];
 291       }
 292       $settings[$k] = $v;
 293     }
 294     return $settings;
 295   }
 296
 297   /**
 298    * Helper fn for addSetting
 299    * Render JavaScript variables for the global CRM object.
 300    *
 301    * @return string
 302    */
 303   public function renderSetting() {
 304     // On a standard page request we construct the CRM object from scratch
 305     if (!self::isAjaxMode()) {
 306       $js = 'var CRM = ' . json_encode($this->getSettings()) . ';';
 307     }
 308     // For an ajax request we append to it
 309     else {
 310       $js = 'CRM.$.extend(true, CRM, ' . json_encode($this->getSettings()) . ');';
 311     }
 312     return sprintf("<script type=\"text/javascript\">\n%s\n</script>\n", $js);
 313   }
 314
 315   /**
 316    * Add translated string to the js CRM object.
 317    * It can then be retrived from the client-side ts() function
 318    * Variable substitutions can happen from client-side
 319    *
 320    * Note: this function rarely needs to be called directly and is mostly for internal use.
 321    * @see CRM_Core_Resources::addScriptFile which automatically adds translated strings from js files
 322    *
 323    * Simple example:
 324    * // From php:
 325    * CRM_Core_Resources::singleton()->addString('Hello');
 326    * // The string is now available to javascript code i.e.
 327    * ts('Hello');
 328    *
 329    * Example with client-side substitutions:
 330    * // From php:
 331    * CRM_Core_Resources::singleton()->addString('Your %1 has been %2');
 332    * // ts() in javascript works the same as in php, for example:
 333    * ts('Your %1 has been %2', {1: objectName, 2: actionTaken});
 334    *
 335    * NOTE: This function does not work with server-side substitutions
 336    * (as this might result in collisions and unwanted variable injections)
 337    * Instead, use code like:
 338    * CRM_Core_Resources::singleton()->addSetting(array('myNamespace' => array('myString' => ts('Your %1 has been %2', array(subs)))));
 339    * And from javascript access it at CRM.myNamespace.myString
 340    *
 341    * @param $text string|array
 342    * @return CRM_Core_Resources
 343    */
 344   public function addString($text) {
 345     foreach ((array) $text as $str) {
 346       $translated = ts($str);
 347       // We only need to push this string to client if the translation
 348       // is actually different from the original
 349       if ($translated != $str) {
 350         $this->addSetting(array('strings' => array($str => $translated)));
 351       }
 352     }
 353     return $this;
 354   }
 355
 356   /**
 357    * Add a CSS file to the current page using <LINK HREF>.
 358    *
 359    * @param $ext string, extension name; use 'civicrm' for core
 360    * @param $file string, file path -- relative to the extension base dir
 361    * @param $weight int, relative weight within a given region
 362    * @param $region string, location within the file; 'html-header', 'page-header', 'page-footer'
 363    * @return CRM_Core_Resources
 364    */
 365   public function addStyleFile($ext, $file, $weight = self::DEFAULT_WEIGHT, $region = self::DEFAULT_REGION) {
 366     return $this->addStyleUrl($this->getUrl($ext, $file, TRUE), $weight, $region);
 367   }
 368
 369   /**
 370    * Add a CSS file to the current page using <LINK HREF>.
 371    *
 372    * @param $url string
 373    * @param $weight int, relative weight within a given region
 374    * @param $region string, location within the file; 'html-header', 'page-header', 'page-footer'
 375    * @return CRM_Core_Resources
 376    */
 377   public function addStyleUrl($url, $weight = self::DEFAULT_WEIGHT, $region = self::DEFAULT_REGION) {
 378     CRM_Core_Region::instance($region)->add(array(
 379       'name' => $url,
 380       'type' => 'styleUrl',
 381       'styleUrl' => $url,
 382       'weight' => $weight,
 383       'region' => $region,
 384     ));
 385     return $this;
 386   }
 387
 388   /**
 389    * Add a CSS content to the current page using <STYLE>.
 390    *
 391    * @param $code string, CSS source code
 392    * @param $weight int, relative weight within a given region
 393    * @param $region string, location within the file; 'html-header', 'page-header', 'page-footer'
 394    * @return CRM_Core_Resources
 395    */
 396   public function addStyle($code, $weight = self::DEFAULT_WEIGHT, $region = self::DEFAULT_REGION) {
 397     CRM_Core_Region::instance($region)->add(array(
 398       // 'name' => automatic
 399       'type' => 'style',
 400       'style' => $code,
 401       'weight' => $weight,
 402       'region' => $region,
 403     ));
 404     return $this;
 405   }
 406
 407   /**
 408    * Determine file path of a resource provided by an extension
 409    *
 410    * @param $ext string, extension name; use 'civicrm' for core
 411    * @param $file string, file path -- relative to the extension base dir
 412    *
 413    * @return bool|string (string|bool), full file path or FALSE if not found
 414    */
 415   public function getPath($ext, $file) {
 416     // TODO consider caching results
 417     $path = $this->extMapper->keyToBasePath($ext) . '/' . $file;
 418     if (is_file($path)) {
 419       return $path;
 420     }
 421     return FALSE;
 422   }
 423
 424   /**
 425    * Determine public URL of a resource provided by an extension
 426    *
 427    * @param $ext string, extension name; use 'civicrm' for core
 428    * @param $file string, file path -- relative to the extension base dir
 429    * @param bool $addCacheCode
 430    *
 431    * @return string, URL
 432    */
 433   public function getUrl($ext, $file = NULL, $addCacheCode = FALSE) {
 434     if ($file === NULL) {
 435       $file = '';
 436     }
 437     if ($addCacheCode) {
 438       $file .= '?r=' . $this->getCacheCode();
 439     }
 440     // TODO consider caching results
 441     return $this->extMapper->keyToUrl($ext) . '/' . $file;
 442   }
 443
 444   /**
 445    * @return string
 446    */
 447   public function getCacheCode() {
 448     return $this->cacheCode;
 449   }
 450
 451   /**
 452    * @param $value
 453    * @return CRM_Core_Resources
 454    */
 455   public function setCacheCode($value) {
 456     $this->cacheCode = $value;
 457     if ($this->cacheCodeKey) {
 458       CRM_Core_BAO_Setting::setItem($value, CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, $this->cacheCodeKey);
 459     }
 460     return $this;
 461   }
 462
 463   /**
 464    * @return CRM_Core_Resources
 465    */
 466   public function resetCacheCode() {
 467     $this->setCacheCode(CRM_Utils_String::createRandom(5, CRM_Utils_String::ALPHANUMERIC));
 468     // Also flush cms resource cache if needed
 469     CRM_Core_Config::singleton()->userSystem->clearResourceCache();
 470     return $this;
 471   }
 472
 473   /**
 474    * This adds CiviCRM's standard css and js to the specified region of the document.
 475    * It will only run once.
 476    *
 477    * TODO: Separate the functional code (like addStyle/addScript) from the policy code
 478    * (like addCoreResources/addCoreStyles).
 479    *
 480    * @param string $region
 481    * @return CRM_Core_Resources
 482    * @access public
 483    */
 484   public function addCoreResources($region = 'html-header') {
 485     if (!isset($this->addedCoreResources[$region]) && !self::isAjaxMode()) {
 486       $this->addedCoreResources[$region] = TRUE;
 487       $config = CRM_Core_Config::singleton();
 488
 489       // Add resources from coreResourceList
 490       $jsWeight = -9999;
 491       foreach ($this->coreResourceList() as $file) {
 492         if (substr($file, -2) == 'js') {
 493           // Don't bother  looking for ts() calls in packages, there aren't any
 494           $translate = (substr($file, 0, 9) != 'packages/');
 495           $this->addScriptFile('civicrm', $file, $jsWeight++, $region, $translate);
 496         }
 497         else {
 498           $this->addStyleFile('civicrm', $file, -100, $region);
 499         }
 500       }
 501
 502       // Dynamic localization script
 503       $this->addScriptUrl(CRM_Utils_System::url('civicrm/ajax/l10n-js/' . $config->lcMessages, array('r' => $this->getCacheCode())), $jsWeight++, $region);
 504
 505       // Add global settings
 506       $settings = array('config' => array(
 507         'ajaxPopupsEnabled' => $this->ajaxPopupsEnabled,
 508         'isFrontend' => $config->userFrameworkFrontend,
 509       ));
 510       // Disable profile creation if user lacks permission
 511       if (!CRM_Core_Permission::check('edit all contacts') && !CRM_Core_Permission::check('add contacts')) {
 512         $settings['profileCreate'] = FALSE;
 513       }
 514       $this->addSetting($settings);
 515
 516       // Give control of jQuery and _ back to the CMS - this loads last
 517       $this->addScriptFile('civicrm', 'js/noconflict.js', 9999, $region, FALSE);
 518
 519       $this->addCoreStyles($region);
 520     }
 521     return $this;
 522   }
 523
 524   /**
 525    * This will add CiviCRM's standard CSS
 526    *
 527    * TODO: Separate the functional code (like addStyle/addScript) from the policy code
 528    * (like addCoreResources/addCoreStyles).
 529    *
 530    * @param string $region
 531    * @return CRM_Core_Resources
 532    */
 533   public function addCoreStyles($region = 'html-header') {
 534     if (!isset($this->addedCoreStyles[$region])) {
 535       $this->addedCoreStyles[$region] = TRUE;
 536
 537       // Load custom or core css
 538       $config = CRM_Core_Config::singleton();
 539       if (!empty($config->customCSSURL)) {
 540         $this->addStyleUrl($config->customCSSURL, 99, $region);
 541       }
 542       if (!CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, 'disable_core_css')) {
 543         $this->addStyleFile('civicrm', 'css/civicrm.css', -99, $region);
 544       }
 545     }
 546     return $this;
 547   }
 548
 549   /**
 550    * Flushes cached translated strings
 551    * @return CRM_Core_Resources
 552    */
 553   public function flushStrings() {
 554     $this->cache->flush();
 555     return $this;
 556   }
 557
 558   /**
 559    * Translate strings in a javascript file
 560    *
 561    * @param $ext string, extension name
 562    * @param $file string, file path
 563    * @return void
 564    */
 565   private function translateScript($ext, $file) {
 566     // For each extension, maintain one cache record which
 567     // includes parsed (translatable) strings for all its JS files.
 568     $stringsByFile = $this->cache->get($ext); // array($file => array(...strings...))
 569     if (!$stringsByFile) {
 570       $stringsByFile = array();
 571     }
 572     if (!isset($stringsByFile[$file])) {
 573       $filePath = $this->getPath($ext, $file);
 574       if ($filePath && is_readable($filePath)) {
 575         $stringsByFile[$file] = CRM_Utils_JS::parseStrings(file_get_contents($filePath));
 576       } else {
 577         $stringsByFile[$file] = array();
 578       }
 579       $this->cache->set($ext, $stringsByFile);
 580     }
 581     $this->addString($stringsByFile[$file]);
 582   }
 583
 584   /**
 585    * Create dynamic script for localizing js widgets
 586    *
 587    * @return string javascript content
 588    */
 589   static function outputLocalizationJS() {
 590     CRM_Core_Page_AJAX::setJsHeaders();
 591     $config = CRM_Core_Config::singleton();
 592     $vars = array(
 593       'moneyFormat' => json_encode(CRM_Utils_Money::format(1234.56)),
 594       'contactSearch' => json_encode($config->includeEmailInName ? ts('Start typing a name or email...') : ts('Start typing a name...')),
 595       'otherSearch' => json_encode(ts('Enter search term...')),
 596       'contactCreate' => CRM_Core_BAO_UFGroup::getCreateLinks(),
 597     );
 598     print CRM_Core_Smarty::singleton()->fetchWith('CRM/common/l10n.js.tpl', $vars);
 599     CRM_Utils_System::civiExit();
 600   }
 601
 602   /**
 603    * List of core resources we add to every CiviCRM page
 604    *
 605    * @return array
 606    */
 607   public function coreResourceList() {
 608     $config = CRM_Core_Config::singleton();
 609     // Use minified files for production, uncompressed in debug mode
 610     // Note, $this->addScriptFile would automatically search for the non-minified file in debug mode but this is probably faster
 611     $min = $config->debug ? '' : '.min';
 612
 613     // Scripts needed by everyone, everywhere
 614     // FIXME: This is too long; list needs finer-grained segmentation
 615     $items = array(
 616       "packages/jquery/jquery-1.11.1$min.js",
 617       "packages/jquery/jquery-ui/jquery-ui$min.js",
 618       "packages/jquery/jquery-ui/jquery-ui$min.css",
 619
 620       "packages/backbone/lodash.compat$min.js",
 621
 622       "packages/jquery/plugins/jquery.mousewheel$min.js",
 623
 624       "packages/jquery/plugins/select2/select2$min.js",
 625       "packages/jquery/plugins/select2/select2.css",
 626
 627       "packages/jquery/plugins/jquery.tableHeader.js",
 628
 629       "packages/jquery/plugins/jquery.textarearesizer.js",
 630
 631       "packages/jquery/plugins/jquery.form$min.js",
 632
 633       "packages/jquery/plugins/jquery.timeentry$min.js",
 634
 635       "packages/jquery/plugins/jquery.blockUI$min.js",
 636
 637       "packages/jquery/plugins/DataTables/media/js/jquery.dataTables$min.js",
 638       "packages/jquery/plugins/DataTables/media/css/jquery.dataTables$min.css",
 639
 640       "packages/jquery/plugins/jquery.validate$min.js",
 641       "packages/jquery/plugins/jquery.ui.datepicker.validation.pack.js",
 642
 643       "js/Common.js",
 644       "js/crm.ajax.js",
 645     );
 646
 647     // These scripts are only needed by back-office users
 648     if (CRM_Core_Permission::check('access CiviCRM')) {
 649       $items[] = "packages/jquery/plugins/jquery.menu$min.js";
 650       $items[] = "packages/jquery/css/menu.css";
 651       $items[] = "packages/jquery/plugins/jquery.jeditable$min.js";
 652       $items[] = "packages/jquery/plugins/jquery.notify$min.js";
 653       $items[] = "js/jquery/jquery.crmeditable.js";
 654     }
 655
 656     // JS for multilingual installations
 657     if (!empty($config->languageLimit) && count($config->languageLimit) > 1 && CRM_Core_Permission::check('translate CiviCRM')) {
 658       $items[] = "js/crm.multilingual.js";
 659     }
 660
 661     // Enable administrators to edit option lists in a dialog
 662     if (CRM_Core_Permission::check('administer CiviCRM') && $this->ajaxPopupsEnabled) {
 663       $items[] = "js/crm.optionEdit.js";
 664     }
 665
 666     // Add localized jQuery UI files
 667     if ($config->lcMessages && $config->lcMessages != 'en_US') {
 668       // Search for i18n file in order of specificity (try fr-CA, then fr)
 669       list($lang) = explode('_', $config->lcMessages);
 670       $path = "packages/jquery/jquery-ui/i18n";
 671       foreach (array(str_replace('_', '-', $config->lcMessages), $lang) as $language) {
 672         $localizationFile = "$path/datepicker-{$language}.js";
 673         if ($this->getPath('civicrm', $localizationFile)) {
 674           $items[] = $localizationFile;
 675           break;
 676         }
 677       }
 678     }
 679
 680     // CMS-specific resources
 681     $config->userSystem->appendCoreResources($items);
 682
 683     return $items;
 684   }
 685
 686   /**
 687    * @return bool - is this page request an ajax snippet?
 688    */
 689   static function isAjaxMode() {
 690     return in_array(CRM_Utils_Array::value('snippet', $_REQUEST), array(CRM_Core_Smarty::PRINT_SNIPPET, CRM_Core_Smarty::PRINT_NOFORM, CRM_Core_Smarty::PRINT_JSON));
 691   }
 692 }