includes/resourceloader/ResourceLoaderFileModule.php

   1 <?php
   2 /**
   3  * Resource loader module based on local JavaScript/CSS files.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @author Trevor Parscal
  22  * @author Roan Kattouw
  23  */
  24
  25 /**
  26  * ResourceLoader module based on local JavaScript/CSS files.
  27  */
  28 class ResourceLoaderFileModule extends ResourceLoaderModule {
  29         /* Protected Members */
  30
  31         /** @var string Local base path, see __construct() */
  32         protected $localBasePath = '';
  33
  34         /** @var string Remote base path, see __construct() */
  35         protected $remoteBasePath = '';
  36
  37         /**
  38          * @var array List of paths to JavaScript files to always include
  39          * @par Usage:
  40          * @code
  41          * array( [file-path], [file-path], ... )
  42          * @endcode
  43          */
  44         protected $scripts = array();
  45
  46         /**
  47          * @var array List of JavaScript files to include when using a specific language
  48          * @par Usage:
  49          * @code
  50          * array( [language-code] => array( [file-path], [file-path], ... ), ... )
  51          * @endcode
  52          */
  53         protected $languageScripts = array();
  54
  55         /**
  56          * @var array List of JavaScript files to include when using a specific skin
  57          * @par Usage:
  58          * @code
  59          * array( [skin-name] => array( [file-path], [file-path], ... ), ... )
  60          * @endcode
  61          */
  62         protected $skinScripts = array();
  63
  64         /**
  65          * @var array List of paths to JavaScript files to include in debug mode
  66          * @par Usage:
  67          * @code
  68          * array( [skin-name] => array( [file-path], [file-path], ... ), ... )
  69          * @endcode
  70          */
  71         protected $debugScripts = array();
  72
  73         /**
  74          * @var array List of paths to JavaScript files to include in the startup module
  75          * @par Usage:
  76          * @code
  77          * array( [file-path], [file-path], ... )
  78          * @endcode
  79          */
  80         protected $loaderScripts = array();
  81
  82         /**
  83          * @var array List of paths to CSS files to always include
  84          * @par Usage:
  85          * @code
  86          * array( [file-path], [file-path], ... )
  87          * @endcode
  88          */
  89         protected $styles = array();
  90
  91         /**
  92          * @var array List of paths to CSS files to include when using specific skins
  93          * @par Usage:
  94          * @code
  95          * array( [file-path], [file-path], ... )
  96          * @endcode
  97          */
  98         protected $skinStyles = array();
  99
 100         /**
 101          * @var array List of modules this module depends on
 102          * @par Usage:
 103          * @code
 104          * array( [file-path], [file-path], ... )
 105          * @endcode
 106          */
 107         protected $dependencies = array();
 108
 109         /**
 110          * @var string File name containing the body of the skip function
 111          */
 112         protected $skipFunction = null;
 113
 114         /**
 115          * @var array List of message keys used by this module
 116          * @par Usage:
 117          * @code
 118          * array( [message-key], [message-key], ... )
 119          * @endcode
 120          */
 121         protected $messages = array();
 122
 123         /** @var string Name of group to load this module in */
 124         protected $group;
 125
 126         /** @var string Position on the page to load this module at */
 127         protected $position = 'bottom';
 128
 129         /** @var bool Link to raw files in debug mode */
 130         protected $debugRaw = true;
 131
 132         /** @var bool Whether mw.loader.state() call should be omitted */
 133         protected $raw = false;
 134
 135         protected $targets = array( 'desktop' );
 136
 137         /**
 138          * @var bool Whether getStyleURLsForDebug should return raw file paths,
 139          * or return load.php urls
 140          */
 141         protected $hasGeneratedStyles = false;
 142
 143         /**
 144          * @var array Cache for mtime
 145          * @par Usage:
 146          * @code
 147          * array( [hash] => [mtime], [hash] => [mtime], ... )
 148          * @endcode
 149          */
 150         protected $modifiedTime = array();
 151
 152         /**
 153          * @var array Place where readStyleFile() tracks file dependencies
 154          * @par Usage:
 155          * @code
 156          * array( [file-path], [file-path], ... )
 157          * @endcode
 158          */
 159         protected $localFileRefs = array();
 160
 161         /* Methods */
 162
 163         /**
 164          * Constructs a new module from an options array.
 165          *
 166          * @param array $options List of options; if not given or empty, an empty module will be
 167          *     constructed
 168          * @param string $localBasePath Base path to prepend to all local paths in $options. Defaults
 169          *     to $IP
 170          * @param string $remoteBasePath Base path to prepend to all remote paths in $options. Defaults
 171          *     to $wgScriptPath
 172          *
 173          * Below is a description for the $options array:
 174          * @throws MWException
 175          * @par Construction options:
 176          * @code
 177          *     array(
 178          *         // Base path to prepend to all local paths in $options. Defaults to $IP
 179          *         'localBasePath' => [base path],
 180          *         // Base path to prepend to all remote paths in $options. Defaults to $wgScriptPath
 181          *         'remoteBasePath' => [base path],
 182          *         // Equivalent of remoteBasePath, but relative to $wgExtensionAssetsPath
 183          *         'remoteExtPath' => [base path],
 184          *         // Equivalent of remoteBasePath, but relative to $wgStylePath
 185          *         'remoteSkinPath' => [base path],
 186          *         // Scripts to always include
 187          *         'scripts' => [file path string or array of file path strings],
 188          *         // Scripts to include in specific language contexts
 189          *         'languageScripts' => array(
 190          *             [language code] => [file path string or array of file path strings],
 191          *         ),
 192          *         // Scripts to include in specific skin contexts
 193          *         'skinScripts' => array(
 194          *             [skin name] => [file path string or array of file path strings],
 195          *         ),
 196          *         // Scripts to include in debug contexts
 197          *         'debugScripts' => [file path string or array of file path strings],
 198          *         // Scripts to include in the startup module
 199          *         'loaderScripts' => [file path string or array of file path strings],
 200          *         // Modules which must be loaded before this module
 201          *         'dependencies' => [module name string or array of module name strings],
 202          *         // Styles to always load
 203          *         'styles' => [file path string or array of file path strings],
 204          *         // Styles to include in specific skin contexts
 205          *         'skinStyles' => array(
 206          *             [skin name] => [file path string or array of file path strings],
 207          *         ),
 208          *         // Messages to always load
 209          *         'messages' => [array of message key strings],
 210          *         // Group which this module should be loaded together with
 211          *         'group' => [group name string],
 212          *         // Position on the page to load this module at
 213          *         'position' => ['bottom' (default) or 'top']
 214          *         // Function that, if it returns true, makes the loader skip this module.
 215          *         // The file must contain valid JavaScript for execution in a private function.
 216          *         // The file must not contain the "function () {" and "}" wrapper though.
 217          *         'skipFunction' => [file path]
 218          *     )
 219          * @endcode
 220          */
 221         public function __construct(
 222                 $options = array(),
 223                 $localBasePath = null,
 224                 $remoteBasePath = null
 225         ) {
 226                 // localBasePath and remoteBasePath both have unbelievably long fallback chains
 227                 // and need to be handled separately.
 228                 list( $this->localBasePath, $this->remoteBasePath ) =
 229                         self::extractBasePaths( $options, $localBasePath, $remoteBasePath );
 230
 231                 // Extract, validate and normalise remaining options
 232                 foreach ( $options as $member => $option ) {
 233                         switch ( $member ) {
 234                                 // Lists of file paths
 235                                 case 'scripts':
 236                                 case 'debugScripts':
 237                                 case 'loaderScripts':
 238                                 case 'styles':
 239                                         $this->{$member} = (array)$option;
 240                                         break;
 241                                 // Collated lists of file paths
 242                                 case 'languageScripts':
 243                                 case 'skinScripts':
 244                                 case 'skinStyles':
 245                                         if ( !is_array( $option ) ) {
 246                                                 throw new MWException(
 247                                                         "Invalid collated file path list error. " .
 248                                                         "'$option' given, array expected."
 249                                                 );
 250                                         }
 251                                         foreach ( $option as $key => $value ) {
 252                                                 if ( !is_string( $key ) ) {
 253                                                         throw new MWException(
 254                                                                 "Invalid collated file path list key error. " .
 255                                                                 "'$key' given, string expected."
 256                                                         );
 257                                                 }
 258                                                 $this->{$member}[$key] = (array)$value;
 259                                         }
 260                                         break;
 261                                 // Lists of strings
 262                                 case 'dependencies':
 263                                 case 'messages':
 264                                 case 'targets':
 265                                         // Normalise
 266                                         $option = array_values( array_unique( (array)$option ) );
 267                                         sort( $option );
 268
 269                                         $this->{$member} = $option;
 270                                         break;
 271                                 // Single strings
 272                                 case 'group':
 273                                 case 'position':
 274                                 case 'skipFunction':
 275                                         $this->{$member} = (string)$option;
 276                                         break;
 277                                 // Single booleans
 278                                 case 'debugRaw':
 279                                 case 'raw':
 280                                         $this->{$member} = (bool)$option;
 281                                         break;
 282                         }
 283                 }
 284         }
 285
 286         /**
 287          * Extract a pair of local and remote base paths from module definition information.
 288          * Implementation note: the amount of global state used in this function is staggering.
 289          *
 290          * @param array $options Module definition
 291          * @param string $localBasePath Path to use if not provided in module definition. Defaults
 292          *     to $IP
 293          * @param string $remoteBasePath Path to use if not provided in module definition. Defaults
 294          *     to $wgScriptPath
 295          * @return array Array( localBasePath, remoteBasePath )
 296          */
 297         public static function extractBasePaths(
 298                 $options = array(),
 299                 $localBasePath = null,
 300                 $remoteBasePath = null
 301         ) {
 302                 global $IP, $wgScriptPath, $wgResourceBasePath;
 303
 304                 // The different ways these checks are done, and their ordering, look very silly,
 305                 // but were preserved for backwards-compatibility just in case. Tread lightly.
 306
 307                 $localBasePath = $localBasePath === null ? $IP : $localBasePath;
 308                 if ( $remoteBasePath === null ) {
 309                         $remoteBasePath = $wgResourceBasePath === null ? $wgScriptPath : $wgResourceBasePath;
 310                 }
 311
 312                 if ( isset( $options['remoteExtPath'] ) ) {
 313                         global $wgExtensionAssetsPath;
 314                         $remoteBasePath = $wgExtensionAssetsPath . '/' . $options['remoteExtPath'];
 315                 }
 316
 317                 if ( isset( $options['remoteSkinPath'] ) ) {
 318                         global $wgStylePath;
 319                         $remoteBasePath = $wgStylePath . '/' . $options['remoteSkinPath'];
 320                 }
 321
 322                 if ( array_key_exists( 'localBasePath', $options ) ) {
 323                         $localBasePath = (string)$options['localBasePath'];
 324                 }
 325
 326                 if ( array_key_exists( 'remoteBasePath', $options ) ) {
 327                         $remoteBasePath = (string)$options['remoteBasePath'];
 328                 }
 329
 330                 // Make sure the remote base path is a complete valid URL,
 331                 // but possibly protocol-relative to avoid cache pollution
 332                 $remoteBasePath = wfExpandUrl( $remoteBasePath, PROTO_RELATIVE );
 333
 334                 return array( $localBasePath, $remoteBasePath );
 335         }
 336
 337         /**
 338          * Gets all scripts for a given context concatenated together.
 339          *
 340          * @param ResourceLoaderContext $context Context in which to generate script
 341          * @return string JavaScript code for $context
 342          */
 343         public function getScript( ResourceLoaderContext $context ) {
 344                 $files = $this->getScriptFiles( $context );
 345                 return $this->readScriptFiles( $files );
 346         }
 347
 348         /**
 349          * @param ResourceLoaderContext $context
 350          * @return array
 351          */
 352         public function getScriptURLsForDebug( ResourceLoaderContext $context ) {
 353                 $urls = array();
 354                 foreach ( $this->getScriptFiles( $context ) as $file ) {
 355                         $urls[] = $this->getRemotePath( $file );
 356                 }
 357                 return $urls;
 358         }
 359
 360         /**
 361          * @return bool
 362          */
 363         public function supportsURLLoading() {
 364                 return $this->debugRaw;
 365         }
 366
 367         /**
 368          * Get loader script.
 369          *
 370          * @return string|bool JavaScript code to be added to startup module
 371          */
 372         public function getLoaderScript() {
 373                 if ( count( $this->loaderScripts ) === 0 ) {
 374                         return false;
 375                 }
 376                 return $this->readScriptFiles( $this->loaderScripts );
 377         }
 378
 379         /**
 380          * Get all styles for a given context.
 381          *
 382          * @param ResourceLoaderContext $context
 383          * @return array CSS code for $context as an associative array mapping media type to CSS text.
 384          */
 385         public function getStyles( ResourceLoaderContext $context ) {
 386                 $styles = $this->readStyleFiles(
 387                         $this->getStyleFiles( $context ),
 388                         $this->getFlip( $context )
 389                 );
 390                 // Collect referenced files
 391                 $this->localFileRefs = array_unique( $this->localFileRefs );
 392                 // If the list has been modified since last time we cached it, update the cache
 393                 try {
 394                         if ( $this->localFileRefs !== $this->getFileDependencies( $context->getSkin() ) ) {
 395                                 $dbw = wfGetDB( DB_MASTER );
 396                                 $dbw->replace( 'module_deps',
 397                                         array( array( 'md_module', 'md_skin' ) ), array(
 398                                                 'md_module' => $this->getName(),
 399                                                 'md_skin' => $context->getSkin(),
 400                                                 'md_deps' => FormatJson::encode( $this->localFileRefs ),
 401                                         )
 402                                 );
 403                         }
 404                 } catch ( Exception $e ) {
 405                         wfDebugLog( 'resourceloader', __METHOD__ . ": failed to update DB: $e" );
 406                 }
 407                 return $styles;
 408         }
 409
 410         /**
 411          * @param ResourceLoaderContext $context
 412          * @return array
 413          */
 414         public function getStyleURLsForDebug( ResourceLoaderContext $context ) {
 415                 if ( $this->hasGeneratedStyles ) {
 416                         // Do the default behaviour of returning a url back to load.php
 417                         // but with only=styles.
 418                         return parent::getStyleURLsForDebug( $context );
 419                 }
 420                 // Our module consists entirely of real css files,
 421                 // in debug mode we can load those directly.
 422                 $urls = array();
 423                 foreach ( $this->getStyleFiles( $context ) as $mediaType => $list ) {
 424                         $urls[$mediaType] = array();
 425                         foreach ( $list as $file ) {
 426                                 $urls[$mediaType][] = $this->getRemotePath( $file );
 427                         }
 428                 }
 429                 return $urls;
 430         }
 431
 432         /**
 433          * Gets list of message keys used by this module.
 434          *
 435          * @return array List of message keys
 436          */
 437         public function getMessages() {
 438                 return $this->messages;
 439         }
 440
 441         /**
 442          * Gets the name of the group this module should be loaded in.
 443          *
 444          * @return string Group name
 445          */
 446         public function getGroup() {
 447                 return $this->group;
 448         }
 449
 450         /**
 451          * @return string
 452          */
 453         public function getPosition() {
 454                 return $this->position;
 455         }
 456
 457         /**
 458          * Gets list of names of modules this module depends on.
 459          *
 460          * @return array List of module names
 461          */
 462         public function getDependencies() {
 463                 return $this->dependencies;
 464         }
 465
 466         /**
 467          * Get the skip function.
 468          *
 469          * @return string|null
 470          */
 471         public function getSkipFunction() {
 472                 if ( !$this->skipFunction ) {
 473                         return null;
 474                 }
 475
 476                 $localPath = $this->getLocalPath( $this->skipFunction );
 477                 if ( !file_exists( $localPath ) ) {
 478                         throw new MWException( __METHOD__ . ": skip function file not found: \"$localPath\"" );
 479                 }
 480                 $contents = file_get_contents( $localPath );
 481                 if ( $this->getConfig()->get( 'ResourceLoaderValidateStaticJS' ) ) {
 482                         $contents = $this->validateScriptFile( $localPath, $contents );
 483                 }
 484                 return $contents;
 485         }
 486
 487         /**
 488          * @return bool
 489          */
 490         public function isRaw() {
 491                 return $this->raw;
 492         }
 493
 494         /**
 495          * Get the last modified timestamp of this module.
 496          *
 497          * Last modified timestamps are calculated from the highest last modified
 498          * timestamp of this module's constituent files as well as the files it
 499          * depends on. This function is context-sensitive, only performing
 500          * calculations on files relevant to the given language, skin and debug
 501          * mode.
 502          *
 503          * @param ResourceLoaderContext $context Context in which to calculate
 504          *     the modified time
 505          * @return int UNIX timestamp
 506          * @see ResourceLoaderModule::getFileDependencies
 507          */
 508         public function getModifiedTime( ResourceLoaderContext $context ) {
 509                 if ( isset( $this->modifiedTime[$context->getHash()] ) ) {
 510                         return $this->modifiedTime[$context->getHash()];
 511                 }
 512                 wfProfileIn( __METHOD__ );
 513
 514                 $files = array();
 515
 516                 // Flatten style files into $files
 517                 $styles = self::collateFilePathListByOption( $this->styles, 'media', 'all' );
 518                 foreach ( $styles as $styleFiles ) {
 519                         $files = array_merge( $files, $styleFiles );
 520                 }
 521
 522                 $skinFiles = self::collateFilePathListByOption(
 523                         self::tryForKey( $this->skinStyles, $context->getSkin(), 'default' ),
 524                         'media',
 525                         'all'
 526                 );
 527                 foreach ( $skinFiles as $styleFiles ) {
 528                         $files = array_merge( $files, $styleFiles );
 529                 }
 530
 531                 // Final merge, this should result in a master list of dependent files
 532                 $files = array_merge(
 533                         $files,
 534                         $this->scripts,
 535                         $context->getDebug() ? $this->debugScripts : array(),
 536                         self::tryForKey( $this->languageScripts, $context->getLanguage() ),
 537                         self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' ),
 538                         $this->loaderScripts
 539                 );
 540                 if ( $this->skipFunction ) {
 541                         $files[] = $this->skipFunction;
 542                 }
 543                 $files = array_map( array( $this, 'getLocalPath' ), $files );
 544                 // File deps need to be treated separately because they're already prefixed
 545                 $files = array_merge( $files, $this->getFileDependencies( $context->getSkin() ) );
 546
 547                 // If a module is nothing but a list of dependencies, we need to avoid
 548                 // giving max() an empty array
 549                 if ( count( $files ) === 0 ) {
 550                         $this->modifiedTime[$context->getHash()] = 1;
 551                         wfProfileOut( __METHOD__ );
 552                         return $this->modifiedTime[$context->getHash()];
 553                 }
 554
 555                 wfProfileIn( __METHOD__ . '-filemtime' );
 556                 $filesMtime = max( array_map( array( __CLASS__, 'safeFilemtime' ), $files ) );
 557                 wfProfileOut( __METHOD__ . '-filemtime' );
 558
 559                 $this->modifiedTime[$context->getHash()] = max(
 560                         $filesMtime,
 561                         $this->getMsgBlobMtime( $context->getLanguage() ),
 562                         $this->getDefinitionMtime( $context )
 563                 );
 564
 565                 wfProfileOut( __METHOD__ );
 566                 return $this->modifiedTime[$context->getHash()];
 567         }
 568
 569         /**
 570          * Get the definition summary for this module.
 571          *
 572          * @param ResourceLoaderContext $context
 573          * @return array
 574          */
 575         public function getDefinitionSummary( ResourceLoaderContext $context ) {
 576                 $summary = array(
 577                         'class' => get_class( $this ),
 578                 );
 579                 foreach ( array(
 580                         'scripts',
 581                         'debugScripts',
 582                         'loaderScripts',
 583                         'styles',
 584                         'languageScripts',
 585                         'skinScripts',
 586                         'skinStyles',
 587                         'dependencies',
 588                         'messages',
 589                         'targets',
 590                         'group',
 591                         'position',
 592                         'skipFunction',
 593                         'localBasePath',
 594                         'remoteBasePath',
 595                         'debugRaw',
 596                         'raw',
 597                 ) as $member ) {
 598                         $summary[$member] = $this->{$member};
 599                 };
 600                 return $summary;
 601         }
 602
 603         /* Protected Methods */
 604
 605         /**
 606          * @param string|ResourceLoaderFilePath $path
 607          * @return string
 608          */
 609         protected function getLocalPath( $path ) {
 610                 if ( $path instanceof ResourceLoaderFilePath ) {
 611                         return $path->getLocalPath();
 612                 }
 613
 614                 return "{$this->localBasePath}/$path";
 615         }
 616
 617         /**
 618          * @param string|ResourceLoaderFilePath $path
 619          * @return string
 620          */
 621         protected function getRemotePath( $path ) {
 622                 if ( $path instanceof ResourceLoaderFilePath ) {
 623                         return $path->getRemotePath();
 624                 }
 625
 626                 return "{$this->remoteBasePath}/$path";
 627         }
 628
 629         /**
 630          * Infer the stylesheet language from a stylesheet file path.
 631          *
 632          * @since 1.22
 633          * @param string $path
 634          * @return string The stylesheet language name
 635          */
 636         public function getStyleSheetLang( $path ) {
 637                 return preg_match( '/\.less$/i', $path ) ? 'less' : 'css';
 638         }
 639
 640         /**
 641          * Collates file paths by option (where provided).
 642          *
 643          * @param array $list List of file paths in any combination of index/path
 644          *     or path/options pairs
 645          * @param string $option Option name
 646          * @param mixed $default Default value if the option isn't set
 647          * @return array List of file paths, collated by $option
 648          */
 649         protected static function collateFilePathListByOption( array $list, $option, $default ) {
 650                 $collatedFiles = array();
 651                 foreach ( (array)$list as $key => $value ) {
 652                         if ( is_int( $key ) ) {
 653                                 // File name as the value
 654                                 if ( !isset( $collatedFiles[$default] ) ) {
 655                                         $collatedFiles[$default] = array();
 656                                 }
 657                                 $collatedFiles[$default][] = $value;
 658                         } elseif ( is_array( $value ) ) {
 659                                 // File name as the key, options array as the value
 660                                 $optionValue = isset( $value[$option] ) ? $value[$option] : $default;
 661                                 if ( !isset( $collatedFiles[$optionValue] ) ) {
 662                                         $collatedFiles[$optionValue] = array();
 663                                 }
 664                                 $collatedFiles[$optionValue][] = $key;
 665                         }
 666                 }
 667                 return $collatedFiles;
 668         }
 669
 670         /**
 671          * Get a list of element that match a key, optionally using a fallback key.
 672          *
 673          * @param array $list List of lists to select from
 674          * @param string $key Key to look for in $map
 675          * @param string $fallback Key to look for in $list if $key doesn't exist
 676          * @return array List of elements from $map which matched $key or $fallback,
 677          *  or an empty list in case of no match
 678          */
 679         protected static function tryForKey( array $list, $key, $fallback = null ) {
 680                 if ( isset( $list[$key] ) && is_array( $list[$key] ) ) {
 681                         return $list[$key];
 682                 } elseif ( is_string( $fallback )
 683                         && isset( $list[$fallback] )
 684                         && is_array( $list[$fallback] )
 685                 ) {
 686                         return $list[$fallback];
 687                 }
 688                 return array();
 689         }
 690
 691         /**
 692          * Get a list of file paths for all scripts in this module, in order of proper execution.
 693          *
 694          * @param ResourceLoaderContext $context
 695          * @return array List of file paths
 696          */
 697         protected function getScriptFiles( ResourceLoaderContext $context ) {
 698                 $files = array_merge(
 699                         $this->scripts,
 700                         self::tryForKey( $this->languageScripts, $context->getLanguage() ),
 701                         self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' )
 702                 );
 703                 if ( $context->getDebug() ) {
 704                         $files = array_merge( $files, $this->debugScripts );
 705                 }
 706
 707                 return array_unique( $files, SORT_REGULAR );
 708         }
 709
 710         /**
 711          * Get a list of file paths for all styles in this module, in order of proper inclusion.
 712          *
 713          * @param ResourceLoaderContext $context
 714          * @return array List of file paths
 715          */
 716         public function getStyleFiles( ResourceLoaderContext $context ) {
 717                 return array_merge_recursive(
 718                         self::collateFilePathListByOption( $this->styles, 'media', 'all' ),
 719                         self::collateFilePathListByOption(
 720                                 self::tryForKey( $this->skinStyles, $context->getSkin(), 'default' ),
 721                                 'media',
 722                                 'all'
 723                         )
 724                 );
 725         }
 726
 727         /**
 728          * Gets a list of file paths for all skin styles in the module used by
 729          * the skin.
 730          *
 731          * @param string $skinName The name of the skin
 732          * @return array A list of file paths collated by media type
 733          */
 734         protected function getSkinStyleFiles( $skinName ) {
 735                 return self::collateFilePathListByOption(
 736                         self::tryForKey( $this->skinStyles, $skinName ),
 737                         'media',
 738                         'all'
 739                 );
 740         }
 741
 742         /**
 743          * Gets a list of file paths for all skin style files in the module,
 744          * for all available skins.
 745          *
 746          * @return array A list of file paths collated by media type
 747          */
 748         protected function getAllSkinStyleFiles() {
 749                 $styleFiles = array();
 750                 $internalSkinNames = array_keys( Skin::getSkinNames() );
 751                 $internalSkinNames[] = 'default';
 752
 753                 foreach ( $internalSkinNames as $internalSkinName ) {
 754                         $styleFiles = array_merge_recursive(
 755                                 $styleFiles,
 756                                 $this->getSkinStyleFiles( $internalSkinName )
 757                         );
 758                 }
 759
 760                 return $styleFiles;
 761         }
 762
 763         /**
 764          * Returns all style files and all skin style files used by this module.
 765          *
 766          * @return array
 767          */
 768         public function getAllStyleFiles() {
 769                 $collatedStyleFiles = array_merge_recursive(
 770                         self::collateFilePathListByOption( $this->styles, 'media', 'all' ),
 771                         $this->getAllSkinStyleFiles()
 772                 );
 773
 774                 $result = array();
 775
 776                 foreach ( $collatedStyleFiles as $media => $styleFiles ) {
 777                         foreach ( $styleFiles as $styleFile ) {
 778                                 $result[] = $this->getLocalPath( $styleFile );
 779                         }
 780                 }
 781
 782                 return $result;
 783         }
 784
 785         /**
 786          * Gets the contents of a list of JavaScript files.
 787          *
 788          * @param array $scripts List of file paths to scripts to read, remap and concetenate
 789          * @throws MWException
 790          * @return string Concatenated and remapped JavaScript data from $scripts
 791          */
 792         protected function readScriptFiles( array $scripts ) {
 793                 if ( empty( $scripts ) ) {
 794                         return '';
 795                 }
 796                 $js = '';
 797                 foreach ( array_unique( $scripts, SORT_REGULAR ) as $fileName ) {
 798                         $localPath = $this->getLocalPath( $fileName );
 799                         if ( !file_exists( $localPath ) ) {
 800                                 throw new MWException( __METHOD__ . ": script file not found: \"$localPath\"" );
 801                         }
 802                         $contents = file_get_contents( $localPath );
 803                         if ( $this->getConfig()->get( 'ResourceLoaderValidateStaticJS' ) ) {
 804                                 // Static files don't really need to be checked as often; unlike
 805                                 // on-wiki module they shouldn't change unexpectedly without
 806                                 // admin interference.
 807                                 $contents = $this->validateScriptFile( $fileName, $contents );
 808                         }
 809                         $js .= $contents . "\n";
 810                 }
 811                 return $js;
 812         }
 813
 814         /**
 815          * Gets the contents of a list of CSS files.
 816          *
 817          * @param array $styles List of media type/list of file paths pairs, to read, remap and
 818          * concetenate
 819          *
 820          * @param bool $flip
 821          *
 822          * @throws MWException
 823          * @return array List of concatenated and remapped CSS data from $styles,
 824          *     keyed by media type
 825          */
 826         public function readStyleFiles( array $styles, $flip ) {
 827                 if ( empty( $styles ) ) {
 828                         return array();
 829                 }
 830                 foreach ( $styles as $media => $files ) {
 831                         $uniqueFiles = array_unique( $files, SORT_REGULAR );
 832                         $styleFiles = array();
 833                         foreach ( $uniqueFiles as $file ) {
 834                                 $styleFiles[] = $this->readStyleFile( $file, $flip );
 835                         }
 836                         $styles[$media] = implode( "\n", $styleFiles );
 837                 }
 838                 return $styles;
 839         }
 840
 841         /**
 842          * Reads a style file.
 843          *
 844          * This method can be used as a callback for array_map()
 845          *
 846          * @param string $path File path of style file to read
 847          * @param bool $flip
 848          *
 849          * @return string CSS data in script file
 850          * @throws MWException If the file doesn't exist
 851          */
 852         protected function readStyleFile( $path, $flip ) {
 853                 $localPath = $this->getLocalPath( $path );
 854                 $remotePath = $this->getRemotePath( $path );
 855                 if ( !file_exists( $localPath ) ) {
 856                         $msg = __METHOD__ . ": style file not found: \"$localPath\"";
 857                         wfDebugLog( 'resourceloader', $msg );
 858                         throw new MWException( $msg );
 859                 }
 860
 861                 if ( $this->getStyleSheetLang( $localPath ) === 'less' ) {
 862                         $style = $this->compileLessFile( $localPath );
 863                         $this->hasGeneratedStyles = true;
 864                 } else {
 865                         $style = file_get_contents( $localPath );
 866                 }
 867
 868                 if ( $flip ) {
 869                         $style = CSSJanus::transform( $style, true, false );
 870                 } else {
 871                         $style = CSSJanus::nullTransform( $style );
 872                 }
 873                 $localDir = dirname( $localPath );
 874                 $remoteDir = dirname( $remotePath );
 875                 // Get and register local file references
 876                 $this->localFileRefs = array_merge(
 877                         $this->localFileRefs,
 878                         CSSMin::getLocalFileReferences( $style, $localDir )
 879                 );
 880                 return CSSMin::remap(
 881                         $style, $localDir, $remoteDir, true
 882                 );
 883         }
 884
 885         /**
 886          * Get whether CSS for this module should be flipped
 887          * @param ResourceLoaderContext $context
 888          * @return bool
 889          */
 890         public function getFlip( $context ) {
 891                 return $context->getDirection() === 'rtl';
 892         }
 893
 894         /**
 895          * Get target(s) for the module, eg ['desktop'] or ['desktop', 'mobile']
 896          *
 897          * @return array Array of strings
 898          */
 899         public function getTargets() {
 900                 return $this->targets;
 901         }
 902
 903         /**
 904          * Compile a LESS file into CSS.
 905          *
 906          * Keeps track of all used files and adds them to localFileRefs.
 907          *
 908          * @since 1.22
 909          * @throws Exception If lessc encounters a parse error
 910          * @param string $fileName File path of LESS source
 911          * @return string CSS source
 912          */
 913         protected function compileLessFile( $fileName ) {
 914                 $compiler = ResourceLoader::getLessCompiler( $this->getConfig() );
 915                 $result = $compiler->compileFile( $fileName );
 916                 $this->localFileRefs += array_keys( $compiler->allParsedFiles() );
 917                 return $result;
 918         }
 919 }