includes/resourceloader/ResourceLoaderContext.php

   1 <?php
   2 /**
   3  * Context for resource loader modules.
   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  * Object passed around to modules which contains information about the state
  27  * of a specific loader request
  28  */
  29 class ResourceLoaderContext {
  30
  31         /* Protected Members */
  32
  33         protected $resourceLoader;
  34         protected $request;
  35         protected $modules;
  36         protected $language;
  37         protected $direction;
  38         protected $skin;
  39         protected $user;
  40         protected $debug;
  41         protected $only;
  42         protected $version;
  43         protected $hash;
  44         protected $raw;
  45
  46         /* Methods */
  47
  48         /**
  49          * @param $resourceLoader ResourceLoader
  50          * @param $request WebRequest
  51          */
  52         public function __construct( $resourceLoader, WebRequest $request ) {
  53                 global $wgDefaultSkin, $wgResourceLoaderDebug;
  54
  55                 $this->resourceLoader = $resourceLoader;
  56                 $this->request = $request;
  57
  58                 // Interpret request
  59                 // List of modules
  60                 $modules = $request->getVal( 'modules' );
  61                 $this->modules = $modules ? self::expandModuleNames( $modules ) : array();
  62                 // Various parameters
  63                 $this->skin = $request->getVal( 'skin' );
  64                 $this->user = $request->getVal( 'user' );
  65                 $this->debug = $request->getFuzzyBool( 'debug', $wgResourceLoaderDebug );
  66                 $this->only = $request->getVal( 'only' );
  67                 $this->version = $request->getVal( 'version' );
  68                 $this->raw = $request->getFuzzyBool( 'raw' );
  69
  70                 $skinnames = Skin::getSkinNames();
  71                 // If no skin is specified, or we don't recognize the skin, use the default skin
  72                 if ( !$this->skin || !isset( $skinnames[$this->skin] ) ) {
  73                         $this->skin = $wgDefaultSkin;
  74                 }
  75         }
  76
  77         /**
  78          * Expand a string of the form jquery.foo,bar|jquery.ui.baz,quux to
  79          * an array of module names like array( 'jquery.foo', 'jquery.bar',
  80          * 'jquery.ui.baz', 'jquery.ui.quux' )
  81          * @param string $modules Packed module name list
  82          * @return array of module names
  83          */
  84         public static function expandModuleNames( $modules ) {
  85                 $retval = array();
  86                 // For backwards compatibility with an earlier hack, replace ! with .
  87                 $modules = str_replace( '!', '.', $modules );
  88                 $exploded = explode( '|', $modules );
  89                 foreach ( $exploded as $group ) {
  90                         if ( strpos( $group, ',' ) === false ) {
  91                                 // This is not a set of modules in foo.bar,baz notation
  92                                 // but a single module
  93                                 $retval[] = $group;
  94                         } else {
  95                                 // This is a set of modules in foo.bar,baz notation
  96                                 $pos = strrpos( $group, '.' );
  97                                 if ( $pos === false ) {
  98                                         // Prefixless modules, i.e. without dots
  99                                         $retval = explode( ',', $group );
 100                                 } else {
 101                                         // We have a prefix and a bunch of suffixes
 102                                         $prefix = substr( $group, 0, $pos ); // 'foo'
 103                                         $suffixes = explode( ',', substr( $group, $pos + 1 ) ); // array( 'bar', 'baz' )
 104                                         foreach ( $suffixes as $suffix ) {
 105                                                 $retval[] = "$prefix.$suffix";
 106                                         }
 107                                 }
 108                         }
 109                 }
 110                 return $retval;
 111         }
 112
 113         /**
 114          * Return a dummy ResourceLoaderContext object suitable for passing into things that don't "really" need a context
 115          * @return ResourceLoaderContext
 116          */
 117         public static function newDummyContext() {
 118                 return new self( null, new FauxRequest( array() ) );
 119         }
 120
 121         /**
 122          * @return ResourceLoader
 123          */
 124         public function getResourceLoader() {
 125                 return $this->resourceLoader;
 126         }
 127
 128         /**
 129          * @return WebRequest
 130          */
 131         public function getRequest() {
 132                 return $this->request;
 133         }
 134
 135         /**
 136          * @return array
 137          */
 138         public function getModules() {
 139                 return $this->modules;
 140         }
 141
 142         /**
 143          * @return string
 144          */
 145         public function getLanguage() {
 146                 if ( $this->language === null ) {
 147                         global $wgLang;
 148                         $this->language = $this->request->getVal( 'lang' );
 149                         if ( !$this->language ) {
 150                                 $this->language = $wgLang->getCode();
 151                         }
 152                 }
 153                 return $this->language;
 154         }
 155
 156         /**
 157          * @return string
 158          */
 159         public function getDirection() {
 160                 if ( $this->direction === null ) {
 161                         $this->direction = $this->request->getVal( 'dir' );
 162                         if ( !$this->direction ) {
 163                                 # directionality based on user language (see bug 6100)
 164                                 $this->direction = Language::factory( $this->getLanguage() )->getDir();
 165                         }
 166                 }
 167                 return $this->direction;
 168         }
 169
 170         /**
 171          * @return string|null
 172          */
 173         public function getSkin() {
 174                 return $this->skin;
 175         }
 176
 177         /**
 178          * @return string|null
 179          */
 180         public function getUser() {
 181                 return $this->user;
 182         }
 183
 184         /**
 185          * @return bool
 186          */
 187         public function getDebug() {
 188                 return $this->debug;
 189         }
 190
 191         /**
 192          * @return String|null
 193          */
 194         public function getOnly() {
 195                 return $this->only;
 196         }
 197
 198         /**
 199          * @return String|null
 200          */
 201         public function getVersion() {
 202                 return $this->version;
 203         }
 204
 205         /**
 206          * @return bool
 207          */
 208         public function getRaw() {
 209                 return $this->raw;
 210         }
 211
 212         /**
 213          * @return bool
 214          */
 215         public function shouldIncludeScripts() {
 216                 return is_null( $this->only ) || $this->only === 'scripts';
 217         }
 218
 219         /**
 220          * @return bool
 221          */
 222         public function shouldIncludeStyles() {
 223                 return is_null( $this->only ) || $this->only === 'styles';
 224         }
 225
 226         /**
 227          * @return bool
 228          */
 229         public function shouldIncludeMessages() {
 230                 return is_null( $this->only ) || $this->only === 'messages';
 231         }
 232
 233         /**
 234          * @return string
 235          */
 236         public function getHash() {
 237                 if ( !isset( $this->hash ) ) {
 238                         $this->hash = implode( '|', array(
 239                                 $this->getLanguage(), $this->getDirection(), $this->skin, $this->user,
 240                                 $this->debug, $this->only, $this->version
 241                         ) );
 242                 }
 243                 return $this->hash;
 244         }
 245 }