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