includes/ResourceLoaderModule.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @author Trevor Parscal
  20  * @author Roan Kattouw
  21  */
  22
  23 /**
  24  * Abstraction for resource loader modules, with name registration and maxage functionality.
  25  */
  26 abstract class ResourceLoaderModule {
  27         /* Protected Members */
  28
  29         protected $name = null;
  30
  31         /* Methods */
  32
  33         /**
  34          * Get this module's name. This is set when the module is registered
  35          * with ResourceLoader::register()
  36          *
  37          * @return Mixed: name (string) or null if no name was set
  38          */
  39         public function getName() {
  40                 return $this->name;
  41         }
  42
  43         /**
  44          * Set this module's name. This is called by ResourceLodaer::register()
  45          * when registering the module. Other code should not call this.
  46          *
  47          * @param $name String: name
  48          */
  49         public function setName( $name ) {
  50                 $this->name = $name;
  51         }
  52
  53         /**
  54          * Get whether CSS for this module should be flipped
  55          */
  56         public function getFlip( $context ) {
  57                 return $context->getDirection() === 'rtl';
  58         }
  59
  60         /**
  61          * Get all JS for this module for a given language and skin.
  62          * Includes all relevant JS except loader scripts.
  63          *
  64          * @param $context ResourceLoaderContext object
  65          * @return String: JS
  66          */
  67         public function getScript( ResourceLoaderContext $context ) {
  68                 // Stub, override expected
  69                 return '';
  70         }
  71
  72         /**
  73          * Get all CSS for this module for a given skin.
  74          *
  75          * @param $context ResourceLoaderContext object
  76          * @return array: strings of CSS keyed by media type
  77          */
  78         public function getStyles( ResourceLoaderContext $context ) {
  79                 // Stub, override expected
  80                 return '';
  81         }
  82
  83         /**
  84          * Get the messages needed for this module.
  85          *
  86          * To get a JSON blob with messages, use MessageBlobStore::get()
  87          *
  88          * @return array of message keys. Keys may occur more than once
  89          */
  90         public function getMessages() {
  91                 // Stub, override expected
  92                 return array();
  93         }
  94
  95         /**
  96          * Get the loader JS for this module, if set.
  97          *
  98          * @return Mixed: loader JS (string) or false if no custom loader set
  99          */
 100         public function getLoaderScript() {
 101                 // Stub, override expected
 102                 return '';
 103         }
 104
 105         /**
 106          * Get a list of modules this module depends on.
 107          *
 108          * Dependency information is taken into account when loading a module
 109          * on the client side. When adding a module on the server side,
 110          * dependency information is NOT taken into account and YOU are
 111          * responsible for adding dependent modules as well. If you don't do
 112          * this, the client side loader will send a second request back to the
 113          * server to fetch the missing modules, which kind of defeats the
 114          * purpose of the resource loader.
 115          *
 116          * To add dependencies dynamically on the client side, use a custom
 117          * loader script, see getLoaderScript()
 118          * @return Array of module names (strings)
 119          */
 120         public function getDependencies() {
 121                 // Stub, override expected
 122                 return array();
 123         }
 124
 125         /* Abstract Methods */
 126
 127         /**
 128          * Get this module's last modification timestamp for a given
 129          * combination of language, skin and debug mode flag. This is typically
 130          * the highest of each of the relevant components' modification
 131          * timestamps. Whenever anything happens that changes the module's
 132          * contents for these parameters, the mtime should increase.
 133          *
 134          * @param $context ResourceLoaderContext object
 135          * @return int UNIX timestamp
 136          */
 137         public abstract function getModifiedTime( ResourceLoaderContext $context );
 138 }
 139
 140 /**
 141  * Module based on local JS/CSS files. This is the most common type of module.
 142  */
 143 class ResourceLoaderFileModule extends ResourceLoaderModule {
 144         /* Protected Members */
 145
 146         protected $scripts = array();
 147         protected $styles = array();
 148         protected $messages = array();
 149         protected $dependencies = array();
 150         protected $debugScripts = array();
 151         protected $languageScripts = array();
 152         protected $skinScripts = array();
 153         protected $skinStyles = array();
 154         protected $loaders = array();
 155         protected $parameters = array();
 156
 157         // In-object cache for file dependencies
 158         protected $fileDeps = array();
 159         // In-object cache for mtime
 160         protected $modifiedTime = array();
 161
 162         /* Methods */
 163
 164         /**
 165          * Construct a new module from an options array.
 166          *
 167          * @param $options array Options array. If empty, an empty module will be constructed
 168          *
 169          * $options format:
 170          *      array(
 171          *              // Required module options (mutually exclusive)
 172          *              'scripts' => 'dir/script.js' | array( 'dir/script1.js', 'dir/script2.js' ... ),
 173          *
 174          *              // Optional module options
 175          *              'languageScripts' => array(
 176          *                      '[lang name]' => 'dir/lang.js' | '[lang name]' => array( 'dir/lang1.js', 'dir/lang2.js' ... )
 177          *                      ...
 178          *              ),
 179          *              'skinScripts' => 'dir/skin.js' | array( 'dir/skin1.js', 'dir/skin2.js' ... ),
 180          *              'debugScripts' => 'dir/debug.js' | array( 'dir/debug1.js', 'dir/debug2.js' ... ),
 181          *
 182          *              // Non-raw module options
 183          *              'dependencies' => 'module' | array( 'module1', 'module2' ... )
 184          *              'loaderScripts' => 'dir/loader.js' | array( 'dir/loader1.js', 'dir/loader2.js' ... ),
 185          *              'styles' => 'dir/file.css' | array( 'dir/file1.css', 'dir/file2.css' ... ), |
 186          *                      array( 'dir/file1.css' => array( 'media' => 'print' ) ),
 187          *              'skinStyles' => array(
 188          *                      '[skin name]' => 'dir/skin.css' |  array( 'dir/skin1.css', 'dir/skin2.css' ... ) |
 189          *                              array( 'dir/file1.css' => array( 'media' => 'print' )
 190          *                      ...
 191          *              ),
 192          *              'messages' => array( 'message1', 'message2' ... ),
 193          *      )
 194          */
 195         public function __construct( $options = array() ) {
 196                 foreach ( $options as $option => $value ) {
 197                         switch ( $option ) {
 198                                 case 'scripts':
 199                                         $this->scripts = (array)$value;
 200                                         break;
 201                                 case 'styles':
 202                                         $this->styles = (array)$value;
 203                                         break;
 204                                 case 'messages':
 205                                         $this->messages = (array)$value;
 206                                         break;
 207                                 case 'dependencies':
 208                                         $this->dependencies = (array)$value;
 209                                         break;
 210                                 case 'debugScripts':
 211                                         $this->debugScripts = (array)$value;
 212                                         break;
 213                                 case 'languageScripts':
 214                                         $this->languageScripts = (array)$value;
 215                                         break;
 216                                 case 'skinScripts':
 217                                         $this->skinScripts = (array)$value;
 218                                         break;
 219                                 case 'skinStyles':
 220                                         $this->skinStyles = (array)$value;
 221                                         break;
 222                                 case 'loaders':
 223                                         $this->loaders = (array)$value;
 224                                         break;
 225                         }
 226                 }
 227         }
 228
 229         /**
 230          * Add script files to this module. In order to be valid, a module
 231          * must contain at least one script file.
 232          *
 233          * @param $scripts Mixed: path to script file (string) or array of paths
 234          */
 235         public function addScripts( $scripts ) {
 236                 $this->scripts = array_merge( $this->scripts, (array)$scripts );
 237         }
 238
 239         /**
 240          * Add style (CSS) files to this module.
 241          *
 242          * @param $styles Mixed: path to CSS file (string) or array of paths
 243          */
 244         public function addStyles( $styles ) {
 245                 $this->styles = array_merge( $this->styles, (array)$styles );
 246         }
 247
 248         /**
 249          * Add messages to this module.
 250          *
 251          * @param $messages Mixed: message key (string) or array of message keys
 252          */
 253         public function addMessages( $messages ) {
 254                 $this->messages = array_merge( $this->messages, (array)$messages );
 255         }
 256
 257         /**
 258          * Add dependencies. Dependency information is taken into account when
 259          * loading a module on the client side. When adding a module on the
 260          * server side, dependency information is NOT taken into account and
 261          * YOU are responsible for adding dependent modules as well. If you
 262          * don't do this, the client side loader will send a second request
 263          * back to the server to fetch the missing modules, which kind of
 264          * defeats the point of using the resource loader in the first place.
 265          *
 266          * To add dependencies dynamically on the client side, use a custom
 267          * loader (see addLoaders())
 268          *
 269          * @param $dependencies Mixed: module name (string) or array of module names
 270          */
 271         public function addDependencies( $dependencies ) {
 272                 $this->dependencies = array_merge( $this->dependencies, (array)$dependencies );
 273         }
 274
 275         /**
 276          * Add debug scripts to the module. These scripts are only included
 277          * in debug mode.
 278          *
 279          * @param $scripts Mixed: path to script file (string) or array of paths
 280          */
 281         public function addDebugScripts( $scripts ) {
 282                 $this->debugScripts = array_merge( $this->debugScripts, (array)$scripts );
 283         }
 284
 285         /**
 286          * Add language-specific scripts. These scripts are only included for
 287          * a given language.
 288          *
 289          * @param $lang String: language code
 290          * @param $scripts Mixed: path to script file (string) or array of paths
 291          */
 292         public function addLanguageScripts( $lang, $scripts ) {
 293                 $this->languageScripts = array_merge_recursive(
 294                         $this->languageScripts,
 295                         array( $lang => $scripts )
 296                 );
 297         }
 298
 299         /**
 300          * Add skin-specific scripts. These scripts are only included for
 301          * a given skin.
 302          *
 303          * @param $skin String: skin name, or 'default'
 304          * @param $scripts Mixed: path to script file (string) or array of paths
 305          */
 306         public function addSkinScripts( $skin, $scripts ) {
 307                 $this->skinScripts = array_merge_recursive(
 308                         $this->skinScripts,
 309                         array( $skin => $scripts )
 310                 );
 311         }
 312
 313         /**
 314          * Add skin-specific CSS. These CSS files are only included for a
 315          * given skin. If there are no skin-specific CSS files for a skin,
 316          * the files defined for 'default' will be used, if any.
 317          *
 318          * @param $skin String: skin name, or 'default'
 319          * @param $scripts Mixed: path to CSS file (string) or array of paths
 320          */
 321         public function addSkinStyles( $skin, $scripts ) {
 322                 $this->skinStyles = array_merge_recursive(
 323                         $this->skinStyles,
 324                         array( $skin => $scripts )
 325                 );
 326         }
 327
 328         /**
 329          * Add loader scripts. These scripts are loaded on every page and are
 330          * responsible for registering this module using
 331          * mediaWiki.loader.register(). If there are no loader scripts defined,
 332          * the resource loader will register the module itself.
 333          *
 334          * Loader scripts are used to determine a module's dependencies
 335          * dynamically on the client side (e.g. based on browser type/version).
 336          * Note that loader scripts are included on every page, so they should
 337          * be lightweight and use mediaWiki.loader.register()'s callback
 338          * feature to defer dependency calculation.
 339          *
 340          * @param $scripts Mixed: path to script file (string) or array of paths
 341          */
 342         public function addLoaders( $scripts ) {
 343                 $this->loaders = array_merge( $this->loaders, (array)$scripts );
 344         }
 345
 346         public function getScript( ResourceLoaderContext $context ) {
 347                 $retval = $this->getPrimaryScript() . "\n" .
 348                         $this->getLanguageScript( $context->getLanguage() ) . "\n" .
 349                         $this->getSkinScript( $context->getSkin() );
 350
 351                 if ( $context->getDebug() ) {
 352                         $retval .= $this->getDebugScript();
 353                 }
 354
 355                 return $retval;
 356         }
 357
 358         public function getStyles( ResourceLoaderContext $context ) {
 359                 $styles = array();
 360                 foreach ( $this->getPrimaryStyles() as $media => $style ) {
 361                         if ( !isset( $styles[$media] ) ) {
 362                                 $styles[$media] = '';
 363                         }
 364                         $styles[$media] .= $style;
 365                 }
 366                 foreach ( $this->getSkinStyles( $context->getSkin() ) as $media => $style ) {
 367                         if ( !isset( $styles[$media] ) ) {
 368                                 $styles[$media] = '';
 369                         }
 370                         $styles[$media] .= $style;
 371                 }
 372
 373                 // Collect referenced files
 374                 $files = array();
 375                 foreach ( $styles as $media => $style ) {
 376                         // Extract and store the list of referenced files
 377                         $files = array_merge( $files, CSSMin::getLocalFileReferences( $style ) );
 378                 }
 379
 380                 // Only store if modified
 381                 if ( $files !== $this->getFileDependencies( $context->getSkin() ) ) {
 382                         $encFiles = FormatJson::encode( $files );
 383                         $dbw = wfGetDb( DB_MASTER );
 384                         $dbw->replace( 'module_deps',
 385                                 array( array( 'md_module', 'md_skin' ) ), array(
 386                                         'md_module' => $this->getName(),
 387                                         'md_skin' => $context->getSkin(),
 388                                         'md_deps' => $encFiles,
 389                                 )
 390                         );
 391
 392                         // Save into memcached
 393                         global $wgMemc;
 394
 395                         $key = wfMemcKey( 'resourceloader', 'module_deps', $this->getName(), $context->getSkin() );
 396                         $wgMemc->set( $key, $encFiles );
 397                 }
 398
 399                 return $styles;
 400         }
 401
 402         public function getMessages() {
 403                 return $this->messages;
 404         }
 405
 406         public function getDependencies() {
 407                 return $this->dependencies;
 408         }
 409
 410         public function getLoaderScript() {
 411                 if ( count( $this->loaders ) == 0 ) {
 412                         return false;
 413                 }
 414
 415                 return self::concatScripts( $this->loaders );
 416         }
 417
 418         /**
 419          * Get the last modified timestamp of this module, which is calculated
 420          * as the highest last modified timestamp of its constituent files and
 421          * the files it depends on (see getFileDependencies()). Only files
 422          * relevant to the given language and skin are taken into account, and
 423          * files only relevant in debug mode are not taken into account when
 424          * debug mode is off.
 425          *
 426          * @param $context ResourceLoaderContext object
 427          * @return Integer: UNIX timestamp
 428          */
 429         public function getModifiedTime( ResourceLoaderContext $context ) {
 430                 if ( isset( $this->modifiedTime[$context->getHash()] ) ) {
 431                         return $this->modifiedTime[$context->getHash()];
 432                 }
 433
 434                 // Sort of nasty way we can get a flat list of files depended on by all styles
 435                 $styles = array();
 436                 foreach ( self::organizeFilesByOption( $this->styles, 'media', 'all' ) as $media => $styleFiles ) {
 437                         $styles = array_merge( $styles, $styleFiles );
 438                 }
 439                 $skinFiles = (array) self::getSkinFiles(
 440                         $context->getSkin(), self::organizeFilesByOption( $this->skinStyles, 'media', 'all' )
 441                 );
 442                 foreach ( $skinFiles as $media => $styleFiles ) {
 443                         $styles = array_merge( $styles, $styleFiles );
 444                 }
 445
 446                 // Final merge, this should result in a master list of dependent files
 447                 $files = array_merge(
 448                         $this->scripts,
 449                         $styles,
 450                         $context->getDebug() ? $this->debugScripts : array(),
 451                         isset( $this->languageScripts[$context->getLanguage()] ) ?
 452                                 (array) $this->languageScripts[$context->getLanguage()] : array(),
 453                         (array) self::getSkinFiles( $context->getSkin(), $this->skinScripts ),
 454                         $this->loaders,
 455                         $this->getFileDependencies( $context->getSkin() )
 456                 );
 457
 458                 $filesMtime = max( array_map( 'filemtime', array_map( array( __CLASS__, 'remapFilename' ), $files ) ) );
 459
 460                 // Get the mtime of the message blob
 461                 // TODO: This timestamp is queried a lot and queried separately for each module. Maybe it should be put in memcached?
 462                 $dbr = wfGetDb( DB_SLAVE );
 463                 $msgBlobMtime = $dbr->selectField( 'msg_resource', 'mr_timestamp', array(
 464                                 'mr_resource' => $this->getName(),
 465                                 'mr_lang' => $context->getLanguage()
 466                         ), __METHOD__
 467                 );
 468                 $msgBlobMtime = $msgBlobMtime ? wfTimestamp( TS_UNIX, $msgBlobMtime ) : 0;
 469
 470                 $this->modifiedTime[$context->getHash()] = max( $filesMtime, $msgBlobMtime );
 471                 return $this->modifiedTime[$context->getHash()];
 472         }
 473
 474         /* Protected Members */
 475
 476         /**
 477          * Get the primary JS for this module. This is pulled from the
 478          * script files added through addScripts()
 479          *
 480          * @return String: JS
 481          */
 482         protected function getPrimaryScript() {
 483                 return self::concatScripts( $this->scripts );
 484         }
 485
 486         /**
 487          * Get the primary CSS for this module. This is pulled from the CSS
 488          * files added through addStyles()
 489          *
 490          * @return String: JS
 491          */
 492         protected function getPrimaryStyles() {
 493                 return self::concatStyles( $this->styles );
 494         }
 495
 496         /**
 497          * Get the debug JS for this module. This is pulled from the script
 498          * files added through addDebugScripts()
 499          *
 500          * @return String: JS
 501          */
 502         protected function getDebugScript() {
 503                 return self::concatScripts( $this->debugScripts );
 504         }
 505
 506         /**
 507          * Get the language-specific JS for a given language. This is pulled
 508          * from the language-specific script files added through addLanguageScripts()
 509          *
 510          * @return String: JS
 511          */
 512         protected function getLanguageScript( $lang ) {
 513                 if ( !isset( $this->languageScripts[$lang] ) ) {
 514                         return '';
 515                 }
 516                 return self::concatScripts( $this->languageScripts[$lang] );
 517         }
 518
 519         /**
 520          * Get the skin-specific JS for a given skin. This is pulled from the
 521          * skin-specific JS files added through addSkinScripts()
 522          *
 523          * @return String: JS
 524          */
 525         protected function getSkinScript( $skin ) {
 526                 return self::concatScripts( self::getSkinFiles( $skin, $this->skinScripts ) );
 527         }
 528
 529         /**
 530          * Get the skin-specific CSS for a given skin. This is pulled from the
 531          * skin-specific CSS files added through addSkinStyles()
 532          *
 533          * @return Array: list of CSS strings keyed by media type
 534          */
 535         protected function getSkinStyles( $skin ) {
 536                 return self::concatStyles( self::getSkinFiles( $skin, $this->skinStyles ) );
 537         }
 538
 539         /**
 540          * Helper function to get skin-specific data from an array.
 541          *
 542          * @param $skin String: skin name
 543          * @param $map Array: map of skin names to arrays
 544          * @return $map[$skin] if set and non-empty, or $map['default'] if set, or an empty array
 545          */
 546         protected static function getSkinFiles( $skin, $map ) {
 547                 $retval = array();
 548
 549                 if ( isset( $map[$skin] ) && $map[$skin] ) {
 550                         $retval = $map[$skin];
 551                 } else if ( isset( $map['default'] ) ) {
 552                         $retval = $map['default'];
 553                 }
 554
 555                 return $retval;
 556         }
 557
 558         /**
 559          * Get the files this module depends on indirectly for a given skin.
 560          * Currently these are only image files referenced by the module's CSS.
 561          *
 562          * @param $skin String: skin name
 563          * @return array of files
 564          */
 565         protected function getFileDependencies( $skin ) {
 566                 // Try in-object cache first
 567                 if ( isset( $this->fileDeps[$skin] ) ) {
 568                         return $this->fileDeps[$skin];
 569                 }
 570
 571                 // Now try memcached
 572                 global $wgMemc;
 573
 574                 $key = wfMemcKey( 'resourceloader', 'module_deps', $this->getName(), $skin );
 575                 $deps = $wgMemc->get( $key );
 576
 577                 if ( !$deps ) {
 578                         $dbr = wfGetDb( DB_SLAVE );
 579                         $deps = $dbr->selectField( 'module_deps', 'md_deps', array(
 580                                         'md_module' => $this->getName(),
 581                                         'md_skin' => $skin,
 582                                 ), __METHOD__
 583                         );
 584                         if ( !$deps ) {
 585                                 $deps = '[]'; // Empty array so we can do negative caching
 586                         }
 587                         $wgMemc->set( $key, $deps );
 588                 }
 589
 590                 $this->fileDeps = FormatJson::decode( $deps, true );
 591
 592                 return $this->fileDeps;
 593         }
 594
 595         /**
 596          * Get the contents of a set of files and concatenate them, with
 597          * newlines in between. Each file is used only once.
 598          *
 599          * @param $files Array of file names
 600          * @return String: concatenated contents of $files
 601          */
 602         protected static function concatScripts( $files ) {
 603                 return implode( "\n", array_map( 'file_get_contents', array_map( array( __CLASS__, 'remapFilename' ), array_unique( (array) $files ) ) ) );
 604         }
 605
 606         protected static function organizeFilesByOption( $files, $option, $default ) {
 607                 $organizedFiles = array();
 608                 foreach ( (array) $files as $key => $value ) {
 609                         if ( is_int( $key ) ) {
 610                                 // File name as the value
 611                                 if ( !isset( $organizedFiles[$default] ) ) {
 612                                         $organizedFiles[$default] = array();
 613                                 }
 614                                 $organizedFiles[$default][] = $value;
 615                         } else if ( is_array( $value ) ) {
 616                                 // File name as the key, options array as the value
 617                                 $media = isset( $value[$option] ) ? $value[$option] : $default;
 618                                 if ( !isset( $organizedFiles[$media] ) ) {
 619                                         $organizedFiles[$media] = array();
 620                                 }
 621                                 $organizedFiles[$media][] = $key;
 622                         }
 623                 }
 624                 return $organizedFiles;
 625         }
 626
 627         /**
 628          * Get the contents of a set of CSS files, remap then and concatenate
 629          * them, with newlines in between. Each file is used only once.
 630          *
 631          * @param $files Array of file names
 632          * @return Array: list of concatenated and remapped contents of $files keyed by media type
 633          */
 634         protected static function concatStyles( $styles ) {
 635                 $styles = self::organizeFilesByOption( $styles, 'media', 'all' );
 636                 foreach ( $styles as $media => $files ) {
 637                         $styles[$media] =
 638                                 implode( "\n", array_map( array( __CLASS__, 'remapStyle' ), array_unique( (array) $files ) ) );
 639                 }
 640                 return $styles;
 641         }
 642
 643         /**
 644          * Remap a relative to $IP. Used as a callback for array_map()
 645          *
 646          * @param $file String: file name
 647          * @return string $IP/$file
 648          */
 649         protected static function remapFilename( $file ) {
 650                 global $IP;
 651
 652                 return "$IP/$file";
 653         }
 654
 655         /**
 656          * Get the contents of a CSS file and run it through CSSMin::remap().
 657          * This wrapper is needed so we can use array_map() in concatStyles()
 658          *
 659          * @param $file String: file name
 660          * @return string Remapped CSS
 661          */
 662         protected static function remapStyle( $file ) {
 663                 global $wgUseDataURLs, $wgScriptPath;
 664                 return CSSMin::remap(
 665                         file_get_contents( self::remapFilename( $file ) ),
 666                         dirname( $file ),
 667                         $wgScriptPath . '/' . dirname( $file ),
 668                         $wgUseDataURLs
 669                 );
 670         }
 671 }
 672
 673 /**
 674  * Abstraction for resource loader modules which pull from wiki pages
 675  */
 676 abstract class ResourceLoaderWikiModule extends ResourceLoaderModule {
 677
 678         /* Protected Members */
 679
 680         // In-object cache for modified time
 681         protected $modifiedTime = array();
 682
 683         /* Abstract Protected Methods */
 684
 685         abstract protected function getPages( ResourceLoaderContext $context );
 686
 687         /* Protected Methods */
 688
 689         protected function getContent( $page, $ns ) {
 690                 if ( $ns === NS_MEDIAWIKI ) {
 691                         return wfMsgExt( $page, 'content' );
 692                 }
 693                 if ( $title = Title::newFromText( $page, $ns ) ) {
 694                         if ( $title->isValidCssJsSubpage() && $revision = Revision::newFromTitle( $title ) ) {
 695                                 return $revision->getRawText();
 696                         }
 697                 }
 698                 return null;
 699         }
 700
 701         /* Methods */
 702
 703         public function getScript( ResourceLoaderContext $context ) {
 704                 global $wgCanonicalNamespaceNames;
 705
 706                 $scripts = '';
 707                 foreach ( $this->getPages( $context ) as $page => $options ) {
 708                         if ( $options['type'] === 'script' ) {
 709                                 if ( $script = $this->getContent( $page, $options['ns'] ) ) {
 710                                         $ns = $wgCanonicalNamespaceNames[$options['ns']];
 711                                         $scripts .= "/*$ns:$page */\n$script\n";
 712                                 }
 713                         }
 714                 }
 715                 return $scripts;
 716         }
 717
 718         public function getStyles( ResourceLoaderContext $context ) {
 719                 global $wgCanonicalNamespaceNames;
 720
 721                 $styles = array();
 722                 foreach ( $this->getPages( $context ) as $page => $options ) {
 723                         if ( $options['type'] === 'style' ) {
 724                                 $media = isset( $options['media'] ) ? $options['media'] : 'all';
 725                                 if ( $style = $this->getContent( $page, $options['ns'] ) ) {
 726                                         if ( !isset( $styles[$media] ) ) {
 727                                                 $styles[$media] = '';
 728                                         }
 729                                         $ns = $wgCanonicalNamespaceNames[$options['ns']];
 730                                         $styles[$media] .= "/* $ns:$page */\n$style\n";
 731                                 }
 732                         }
 733                 }
 734                 return $styles;
 735         }
 736
 737         public function getModifiedTime( ResourceLoaderContext $context ) {
 738                 $hash = $context->getHash();
 739                 if ( isset( $this->modifiedTime[$hash] ) ) {
 740                         return $this->modifiedTime[$hash];
 741                 }
 742                 $titles = array();
 743                 foreach ( $this->getPages( $context ) as $page => $options ) {
 744                         $titles[] = Title::makeTitle( $options['ns'], $page );
 745                 }
 746                 // Do batch existence check
 747                 // TODO: This would work better if page_touched were loaded by this as well
 748                 $lb = new LinkBatch( $titles );
 749                 $lb->execute();
 750                 $modifiedTime = 1; // wfTimestamp() interprets 0 as "now"
 751                 foreach ( $titles as $title ) {
 752                         if ( $title->exists() ) {
 753                                 $modifiedTime = max( $modifiedTime, wfTimestamp( TS_UNIX, $title->getTouched() ) );
 754                         }
 755                 }
 756                 return $this->modifiedTime[$hash] = $modifiedTime;
 757         }
 758 }
 759
 760 /**
 761  * Module for site customizations
 762  */
 763 class ResourceLoaderSiteModule extends ResourceLoaderWikiModule {
 764
 765         /* Protected Methods */
 766
 767         protected function getPages( ResourceLoaderContext $context ) {
 768                 global $wgHandheldStyle;
 769
 770                 $pages = array(
 771                         'Common.js' => array( 'ns' => NS_MEDIAWIKI, 'type' => 'script' ),
 772                         'Common.css' => array( 'ns' => NS_MEDIAWIKI, 'type' => 'style' ),
 773                         ucfirst( $context->getSkin() ) . '.js' => array( 'ns' => NS_MEDIAWIKI, 'type' => 'script' ),
 774                         ucfirst( $context->getSkin() ) . '.css' => array( 'ns' => NS_MEDIAWIKI, 'type' => 'style' ),
 775                         'Print.css' => array( 'ns' => NS_MEDIAWIKI, 'type' => 'style', 'media' => 'print' ),
 776                 );
 777                 if ( $wgHandheldStyle ) {
 778                         $pages['Handheld.css'] = array( 'ns' => NS_MEDIAWIKI, 'type' => 'style', 'media' => 'handheld' );
 779                 }
 780                 return $pages;
 781         }
 782 }
 783
 784 /**
 785  * Module for user customizations
 786  */
 787 class ResourceLoaderUserModule extends ResourceLoaderWikiModule {
 788
 789         /* Protected Methods */
 790
 791         protected function getPages( ResourceLoaderContext $context ) {
 792                 global $wgAllowUserCss;
 793
 794                 if ( $context->getUser() && $wgAllowUserCss ) {
 795                         $username = $context->getUser();
 796                         return array(
 797                                 "$username/common.js" => array( 'ns' => NS_USER, 'type' => 'script' ),
 798                                 "$username/" . $context->getSkin() . '.js' => array( 'ns' => NS_USER, 'type' => 'script' ),
 799                                 "$username/common.css" => array( 'ns' => NS_USER, 'type' => 'style' ),
 800                                 "$username/" . $context->getSkin() . '.css' => array( 'ns' => NS_USER, 'type' => 'style' ),
 801                         );
 802                 }
 803                 return array();
 804         }
 805 }
 806
 807 /**
 808  * Module for user preference customizations
 809  */
 810 class ResourceLoaderUserPreferencesModule extends ResourceLoaderModule {
 811
 812         /* Protected Members */
 813
 814         protected $modifiedTime = array();
 815
 816         /* Methods */
 817
 818         public function getModifiedTime( ResourceLoaderContext $context ) {
 819                 $hash = $context->getHash();
 820                 if ( isset( $this->modifiedTime[$hash] ) ) {
 821                         return $this->modifiedTime[$hash];
 822                 }
 823                 if ( $context->getUser() && $user = User::newFromName( $context->getUser() ) ) {
 824                         return $this->modifiedTime[$hash] = $user->getTouched();
 825                 } else {
 826                         return 0;
 827                 }
 828         }
 829
 830         public function getStyles( ResourceLoaderContext $context ) {
 831                 global $wgAllowUserCssPrefs;
 832                 if ( $wgAllowUserCssPrefs ) {
 833                         $user = User::newFromName( $context->getUser() );
 834                         if ( $user === false ) {
 835                                 $user = User::newFromId( 0 );
 836                         }
 837
 838                         $rules = array();
 839                         if ( ( $underline = $user->getOption( 'underline' ) ) < 2 ) {
 840                                 $rules[] = "a { text-decoration: " . ( $underline ? 'underline' : 'none' ) . "; }";
 841                         }
 842                         if ( $user->getOption( 'highlightbroken' ) ) {
 843                                 $rules[] = "a.new, #quickbar a.new { color: #CC2200; }\n";
 844                         } else {
 845                                 $rules[] = "a.new, #quickbar a.new, a.stub, #quickbar a.stub { color: inherit; }";
 846                                 $rules[] = "a.new:after, #quickbar a.new:after { content: '?'; color: #CC2200; }";
 847                                 $rules[] = "a.stub:after, #quickbar a.stub:after { content: '!'; color: #772233; }";
 848                         }
 849                         if ( $user->getOption( 'justify' ) ) {
 850                                 $rules[] = "#article, #bodyContent, #mw_content { text-align: justify; }\n";
 851                         }
 852                         if ( !$user->getOption( 'showtoc' ) ) {
 853                                 $rules[] = "#toc { display: none; }\n";
 854                         }
 855                         if ( !$user->getOption( 'editsection' ) ) {
 856                                 $rules[] = ".editsection { display: none; }\n";
 857                         }
 858                         if ( ( $fontstyle = $user->getOption( 'editfont' ) ) !== 'default' ) {
 859                                 $rules[] = "textarea { font-family: $fontstyle; }\n";
 860                         }
 861                         return array( 'all' => implode( "\n", $rules ) );
 862                 }
 863                 return array();
 864         }
 865
 866         public function getFlip( $context ) {
 867                 global $wgContLang;
 868
 869                 return $wgContLang->getDir() !== $context->getDirection();
 870         }
 871 }
 872
 873 class ResourceLoaderStartUpModule extends ResourceLoaderModule {
 874         /* Protected Members */
 875
 876         protected $modifiedTime = array();
 877
 878         /* Protected Methods */
 879
 880         protected function getConfig( $context ) {
 881                 global $wgLoadScript, $wgScript, $wgStylePath, $wgScriptExtension, $wgArticlePath, $wgScriptPath, $wgServer,
 882                         $wgContLang, $wgBreakFrames, $wgVariantArticlePath, $wgActionPaths, $wgUseAjax, $wgVersion,
 883                         $wgEnableAPI, $wgEnableWriteAPI, $wgDBname, $wgEnableMWSuggest, $wgSitename, $wgFileExtensions;
 884
 885                 // Pre-process information
 886                 $separatorTransTable = $wgContLang->separatorTransformTable();
 887                 $separatorTransTable = $separatorTransTable ? $separatorTransTable : array();
 888                 $compactSeparatorTransTable = array(
 889                         implode( "\t", array_keys( $separatorTransTable ) ),
 890                         implode( "\t", $separatorTransTable ),
 891                 );
 892                 $digitTransTable = $wgContLang->digitTransformTable();
 893                 $digitTransTable = $digitTransTable ? $digitTransTable : array();
 894                 $compactDigitTransTable = array(
 895                         implode( "\t", array_keys( $digitTransTable ) ),
 896                         implode( "\t", $digitTransTable ),
 897                 );
 898                 $mainPage = Title::newMainPage();
 899
 900                 // Build list of variables
 901                 $vars = array(
 902                         'wgLoadScript' => $wgLoadScript,
 903                         'debug' => $context->getDebug(),
 904                         'skin' => $context->getSkin(),
 905                         'stylepath' => $wgStylePath,
 906                         'wgUrlProtocols' => wfUrlProtocols(),
 907                         'wgArticlePath' => $wgArticlePath,
 908                         'wgScriptPath' => $wgScriptPath,
 909                         'wgScriptExtension' => $wgScriptExtension,
 910                         'wgScript' => $wgScript,
 911                         'wgVariantArticlePath' => $wgVariantArticlePath,
 912                         'wgActionPaths' => $wgActionPaths,
 913                         'wgServer' => $wgServer,
 914                         'wgUserLanguage' => $context->getLanguage(),
 915                         'wgContentLanguage' => $wgContLang->getCode(),
 916                         'wgBreakFrames' => $wgBreakFrames,
 917                         'wgVersion' => $wgVersion,
 918                         'wgEnableAPI' => $wgEnableAPI,
 919                         'wgEnableWriteAPI' => $wgEnableWriteAPI,
 920                         'wgSeparatorTransformTable' => $compactSeparatorTransTable,
 921                         'wgDigitTransformTable' => $compactDigitTransTable,
 922                         'wgMainPageTitle' => $mainPage ? $mainPage->getPrefixedText() : null,
 923                         'wgFormattedNamespaces' => $wgContLang->getFormattedNamespaces(),
 924                         'wgNamespaceIds' => $wgContLang->getNamespaceIds(),
 925                         'wgSiteName' => $wgSitename,
 926                         'wgFileExtensions' => $wgFileExtensions,
 927                 );
 928                 if ( $wgContLang->hasVariants() ) {
 929                         $vars['wgUserVariant'] = $wgContLang->getPreferredVariant();
 930                 }
 931                 if ( $wgUseAjax && $wgEnableMWSuggest ) {
 932                         $vars['wgMWSuggestTemplate'] = SearchEngine::getMWSuggestTemplate();
 933                         $vars['wgDBname'] = $wgDBname;
 934                 }
 935
 936                 return $vars;
 937         }
 938
 939         /* Methods */
 940
 941         public function getScript( ResourceLoaderContext $context ) {
 942                 global $IP, $wgLoadScript;
 943
 944                 $scripts = file_get_contents( "$IP/resources/startup.js" );
 945
 946                 if ( $context->getOnly() === 'scripts' ) {
 947                         // Get all module registrations
 948                         $registration = ResourceLoader::getModuleRegistrations( $context );
 949                         // Build configuration
 950                         $config = FormatJson::encode( $this->getConfig( $context ) );
 951                         // Add a well-known start-up function
 952                         $scripts .= "window.startUp = function() { $registration mediaWiki.config.set( $config ); };";
 953                         // Build load query for jquery and mediawiki modules
 954                         $query = array(
 955                                 'modules' => implode( '|', array( 'jquery', 'mediawiki' ) ),
 956                                 'only' => 'scripts',
 957                                 'lang' => $context->getLanguage(),
 958                                 'skin' => $context->getSkin(),
 959                                 'debug' => $context->getDebug() ? 'true' : 'false',
 960                                 'version' => wfTimestamp( TS_ISO_8601, round( max(
 961                                         ResourceLoader::getModule( 'jquery' )->getModifiedTime( $context ),
 962                                         ResourceLoader::getModule( 'mediawiki' )->getModifiedTime( $context )
 963                                 ), -2 ) )
 964                         );
 965                         // Uniform query order
 966                         ksort( $query );
 967                         // Build HTML code for loading jquery and mediawiki modules
 968                         $loadScript = Html::linkedScript( $wgLoadScript . '?' . wfArrayToCGI( $query ) );
 969                         // Add code to add jquery and mediawiki loading code; only if the current client is compatible
 970                         $scripts .= "if ( isCompatible() ) { document.write( '$loadScript' ); }";
 971                         // Delete the compatible function - it's not needed anymore
 972                         $scripts .= "delete window['isCompatible'];";
 973                 }
 974
 975                 return $scripts;
 976         }
 977
 978         public function getModifiedTime( ResourceLoaderContext $context ) {
 979                 global $IP;
 980
 981                 $hash = $context->getHash();
 982                 if ( isset( $this->modifiedTime[$hash] ) ) {
 983                         return $this->modifiedTime[$hash];
 984                 }
 985                 $this->modifiedTime[$hash] = filemtime( "$IP/resources/startup.js" );
 986                 // ATTENTION!: Because of the line above, this is not going to cause infinite recursion - think carefully
 987                 // before making changes to this code!
 988                 $this->modifiedTime[$hash] = ResourceLoader::getHighestModifiedTime( $context );
 989                 return $this->modifiedTime[$hash];
 990         }
 991
 992         public function getFlip( $context ) {
 993                 global $wgContLang;
 994
 995                 return $wgContLang->getDir() !== $context->getDirection();
 996         }
 997 }