includes/resourceloader/ResourceLoaderStartUpModule.php

   1 <?php
   2 /**
   3  * Module for resource loader initialization.
   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 class ResourceLoaderStartUpModule extends ResourceLoaderModule {
  26
  27         /* Protected Members */
  28
  29         protected $modifiedTime = array();
  30         protected $targets = array( 'desktop', 'mobile' );
  31
  32         /* Protected Methods */
  33
  34         /**
  35          * @param $context ResourceLoaderContext
  36          * @return array
  37          */
  38         protected function getConfig( $context ) {
  39                 global $wgLoadScript, $wgScript, $wgStylePath, $wgScriptExtension,
  40                         $wgArticlePath, $wgScriptPath, $wgServer, $wgContLang,
  41                         $wgVariantArticlePath, $wgActionPaths, $wgVersion,
  42                         $wgEnableAPI, $wgEnableWriteAPI, $wgDBname,
  43                         $wgSitename, $wgFileExtensions, $wgExtensionAssetsPath,
  44                         $wgCookiePrefix, $wgResourceLoaderMaxQueryLength,
  45                         $wgResourceLoaderStorageEnabled, $wgResourceLoaderStorageVersion,
  46                         $wgSearchType;
  47
  48                 $mainPage = Title::newMainPage();
  49
  50                 /**
  51                  * Namespace related preparation
  52                  * - wgNamespaceIds: Key-value pairs of all localized, canonical and aliases for namespaces.
  53                  * - wgCaseSensitiveNamespaces: Array of namespaces that are case-sensitive.
  54                  */
  55                 $namespaceIds = $wgContLang->getNamespaceIds();
  56                 $caseSensitiveNamespaces = array();
  57                 foreach ( MWNamespace::getCanonicalNamespaces() as $index => $name ) {
  58                         $namespaceIds[$wgContLang->lc( $name )] = $index;
  59                         if ( !MWNamespace::isCapitalized( $index ) ) {
  60                                 $caseSensitiveNamespaces[] = $index;
  61                         }
  62                 }
  63
  64                 // Build list of variables
  65                 $vars = array(
  66                         'wgLoadScript' => $wgLoadScript,
  67                         'debug' => $context->getDebug(),
  68                         'skin' => $context->getSkin(),
  69                         'stylepath' => $wgStylePath,
  70                         'wgUrlProtocols' => wfUrlProtocols(),
  71                         'wgArticlePath' => $wgArticlePath,
  72                         'wgScriptPath' => $wgScriptPath,
  73                         'wgScriptExtension' => $wgScriptExtension,
  74                         'wgScript' => $wgScript,
  75                         'wgSearchType' => $wgSearchType,
  76                         'wgVariantArticlePath' => $wgVariantArticlePath,
  77                         // Force object to avoid "empty" associative array from
  78                         // becoming [] instead of {} in JS (bug 34604)
  79                         'wgActionPaths' => (object)$wgActionPaths,
  80                         'wgServer' => $wgServer,
  81                         'wgUserLanguage' => $context->getLanguage(),
  82                         'wgContentLanguage' => $wgContLang->getCode(),
  83                         'wgVersion' => $wgVersion,
  84                         'wgEnableAPI' => $wgEnableAPI,
  85                         'wgEnableWriteAPI' => $wgEnableWriteAPI,
  86                         'wgMainPageTitle' => $mainPage->getPrefixedText(),
  87                         'wgFormattedNamespaces' => $wgContLang->getFormattedNamespaces(),
  88                         'wgNamespaceIds' => $namespaceIds,
  89                         'wgContentNamespaces' => MWNamespace::getContentNamespaces(),
  90                         'wgSiteName' => $wgSitename,
  91                         'wgFileExtensions' => array_values( array_unique( $wgFileExtensions ) ),
  92                         'wgDBname' => $wgDBname,
  93                         // This sucks, it is only needed on Special:Upload, but I could
  94                         // not find a way to add vars only for a certain module
  95                         'wgFileCanRotate' => BitmapHandler::canRotate(),
  96                         'wgAvailableSkins' => Skin::getSkinNames(),
  97                         'wgExtensionAssetsPath' => $wgExtensionAssetsPath,
  98                         // MediaWiki sets cookies to have this prefix by default
  99                         'wgCookiePrefix' => $wgCookiePrefix,
 100                         'wgResourceLoaderMaxQueryLength' => $wgResourceLoaderMaxQueryLength,
 101                         'wgCaseSensitiveNamespaces' => $caseSensitiveNamespaces,
 102                         'wgLegalTitleChars' => Title::convertByteClassToUnicodeClass( Title::legalChars() ),
 103                         'wgResourceLoaderStorageVersion' => $wgResourceLoaderStorageVersion,
 104                         'wgResourceLoaderStorageEnabled' => $wgResourceLoaderStorageEnabled,
 105                 );
 106
 107                 wfRunHooks( 'ResourceLoaderGetConfigVars', array( &$vars ) );
 108
 109                 return $vars;
 110         }
 111
 112         /**
 113          * Gets registration code for all modules
 114          *
 115          * @param $context ResourceLoaderContext object
 116          * @return String: JavaScript code for registering all modules with the client loader
 117          */
 118         public static function getModuleRegistrations( ResourceLoaderContext $context ) {
 119                 global $wgCacheEpoch;
 120                 wfProfileIn( __METHOD__ );
 121
 122                 $out = '';
 123                 $registrations = array();
 124                 $resourceLoader = $context->getResourceLoader();
 125                 $target = $context->getRequest()->getVal( 'target', 'desktop' );
 126
 127                 // Register sources
 128                 $out .= ResourceLoader::makeLoaderSourcesScript( $resourceLoader->getSources() );
 129
 130                 // Register modules
 131                 foreach ( $resourceLoader->getModuleNames() as $name ) {
 132                         $module = $resourceLoader->getModule( $name );
 133                         $moduleTargets = $module->getTargets();
 134                         if ( !in_array( $target, $moduleTargets ) ) {
 135                                 continue;
 136                         }
 137                         $deps = $module->getDependencies();
 138                         $group = $module->getGroup();
 139                         $source = $module->getSource();
 140                         // Support module loader scripts
 141                         $loader = $module->getLoaderScript();
 142                         if ( $loader !== false ) {
 143                                 $version = wfTimestamp( TS_ISO_8601_BASIC,
 144                                         $module->getModifiedTime( $context ) );
 145                                 $out .= ResourceLoader::makeCustomLoaderScript( $name, $version, $deps, $group, $source, $loader );
 146                                 continue;
 147                         }
 148
 149                         // Automatically register module
 150                         // getModifiedTime() is supposed to return a UNIX timestamp, but it doesn't always
 151                         // seem to do that, and custom implementations might forget. Coerce it to TS_UNIX
 152                         $moduleMtime = wfTimestamp( TS_UNIX, $module->getModifiedTime( $context ) );
 153                         $mtime = max( $moduleMtime, wfTimestamp( TS_UNIX, $wgCacheEpoch ) );
 154
 155                         if ( !count( $deps ) && $group === null && $source === 'local' ) {
 156                                 // Modules without dependencies, a group or a foreign source pass two arguments (name, timestamp) to
 157                                 // mw.loader.register()
 158                                 $registrations[] = array( $name, $mtime );
 159                         } elseif ( $group === null && $source === 'local' ) {
 160                                 // Modules with dependencies but no group or foreign source pass three arguments
 161                                 // (name, timestamp, dependencies) to mw.loader.register()
 162                                 $registrations[] = array( $name, $mtime, $deps );
 163                         } elseif ( $source === 'local' ) {
 164                                 // Modules with a group but no foreign source pass four arguments (name, timestamp, dependencies, group)
 165                                 // to mw.loader.register()
 166                                 $registrations[] = array( $name, $mtime, $deps, $group );
 167                         } else {
 168                                 // Modules with a foreign source pass five arguments (name, timestamp, dependencies, group, source)
 169                                 // to mw.loader.register()
 170                                 $registrations[] = array( $name, $mtime, $deps, $group, $source );
 171                         }
 172                 }
 173                 $out .= ResourceLoader::makeLoaderRegisterScript( $registrations );
 174
 175                 wfProfileOut( __METHOD__ );
 176                 return $out;
 177         }
 178
 179         /* Methods */
 180
 181         /**
 182          * @return bool
 183          */
 184         public function isRaw() {
 185                 return true;
 186         }
 187
 188         /**
 189          * Get the load URL of the startup modules.
 190          *
 191          * This is a helper for getScript(), but can also be called standalone, such
 192          * as when generating an AppCache manifest.
 193          *
 194          * @param $context ResourceLoaderContext
 195          * @return string
 196          */
 197         public static function getStartupModulesUrl( ResourceLoaderContext $context ) {
 198                 // The core modules:
 199                 $moduleNames = array( 'jquery', 'mediawiki' );
 200                 wfRunHooks( 'ResourceLoaderGetStartupModules', array( &$moduleNames ) );
 201
 202                 // Get the latest version
 203                 $loader = $context->getResourceLoader();
 204                 $version = 0;
 205                 foreach ( $moduleNames as $moduleName ) {
 206                         $version = max( $version,
 207                                 $loader->getModule( $moduleName )->getModifiedTime( $context )
 208                         );
 209                 }
 210
 211                 $query = array(
 212                         'modules' => ResourceLoader::makePackedModulesString( $moduleNames ),
 213                         'only' => 'scripts',
 214                         'lang' => $context->getLanguage(),
 215                         'skin' => $context->getSkin(),
 216                         'debug' => $context->getDebug() ? 'true' : 'false',
 217                         'version' => wfTimestamp( TS_ISO_8601_BASIC, $version )
 218                 );
 219                 // Ensure uniform query order
 220                 ksort( $query );
 221                 return  wfAppendQuery( wfScript( 'load' ), $query );
 222         }
 223
 224         /**
 225          * @param $context ResourceLoaderContext
 226          * @return string
 227          */
 228         public function getScript( ResourceLoaderContext $context ) {
 229                 global $IP, $wgLegacyJavaScriptGlobals;
 230
 231                 $out = file_get_contents( "$IP/resources/startup.js" );
 232                 if ( $context->getOnly() === 'scripts' ) {
 233
 234                         // Startup function
 235                         $configuration = $this->getConfig( $context );
 236                         $registrations = self::getModuleRegistrations( $context );
 237                         $registrations = str_replace( "\n", "\n\t", trim( $registrations ) ); // fix indentation
 238                         $out .= "var startUp = function() {\n" .
 239                                 "\tmw.config = new " . Xml::encodeJsCall( 'mw.Map', array( $wgLegacyJavaScriptGlobals ) ) . "\n" .
 240                                 "\t$registrations\n" .
 241                                 "\t" . Xml::encodeJsCall( 'mw.config.set', array( $configuration ) ) .
 242                                 "};\n";
 243
 244                         // Conditional script injection
 245                         $scriptTag = Html::linkedScript( self::getStartupModulesUrl( $context ) );
 246                         $out .= "if ( isCompatible() ) {\n" .
 247                                 "\t" . Xml::encodeJsCall( 'document.write', array( $scriptTag ) ) .
 248                                 "}\n" .
 249                                 "delete isCompatible;";
 250                 }
 251
 252                 return $out;
 253         }
 254
 255         /**
 256          * @return bool
 257          */
 258         public function supportsURLLoading() {
 259                 return false;
 260         }
 261
 262         /**
 263          * @param $context ResourceLoaderContext
 264          * @return array|mixed
 265          */
 266         public function getModifiedTime( ResourceLoaderContext $context ) {
 267                 global $IP, $wgCacheEpoch;
 268
 269                 $hash = $context->getHash();
 270                 if ( isset( $this->modifiedTime[$hash] ) ) {
 271                         return $this->modifiedTime[$hash];
 272                 }
 273
 274                 // Call preloadModuleInfo() on ALL modules as we're about
 275                 // to call getModifiedTime() on all of them
 276                 $loader = $context->getResourceLoader();
 277                 $loader->preloadModuleInfo( $loader->getModuleNames(), $context );
 278
 279                 $this->modifiedTime[$hash] = filemtime( "$IP/resources/startup.js" );
 280                 // ATTENTION!: Because of the line above, this is not going to cause
 281                 // infinite recursion - think carefully before making changes to this
 282                 // code!
 283                 $time = wfTimestamp( TS_UNIX, $wgCacheEpoch );
 284                 foreach ( $loader->getModuleNames() as $name ) {
 285                         $module = $loader->getModule( $name );
 286                         $time = max( $time, $module->getModifiedTime( $context ) );
 287                 }
 288                 $this->modifiedTime[$hash] = $time;
 289                 return $this->modifiedTime[$hash];
 290         }
 291
 292         /* Methods */
 293
 294         /**
 295          * @return string
 296          */
 297         public function getGroup() {
 298                 return 'startup';
 299         }
 300 }