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         /* Protected Members */
  31
  32         protected $resourceLoader;
  33         protected $request;
  34         protected $modules;
  35         protected $language;
  36         protected $direction;
  37         protected $skin;
  38         protected $user;
  39         protected $debug;
  40         protected $only;
  41         protected $version;
  42         protected $hash;
  43         protected $raw;
  44
  45         /* Methods */
  46
  47         /**
  48          * @param ResourceLoader $resourceLoader
  49          * @param WebRequest $request
  50          */
  51         public function __construct( $resourceLoader, WebRequest $request ) {
  52                 global $wgDefaultSkin, $wgResourceLoaderDebug;
  53
  54                 $this->resourceLoader = $resourceLoader;
  55                 $this->request = $request;
  56
  57                 // Interpret request
  58                 // List of modules
  59                 $modules = $request->getVal( 'modules' );
  60                 $this->modules = $modules ? self::expandModuleNames( $modules ) : array();
  61                 // Various parameters
  62                 $this->skin = $request->getVal( 'skin' );
  63                 $this->user = $request->getVal( 'user' );
  64                 $this->debug = $request->getFuzzyBool( 'debug', $wgResourceLoaderDebug );
  65                 $this->only = $request->getVal( 'only' );
  66                 $this->version = $request->getVal( 'version' );
  67                 $this->raw = $request->getFuzzyBool( 'raw' );
  68
  69                 $skinnames = Skin::getSkinNames();
  70                 // If no skin is specified, or we don't recognize the skin, use the default skin
  71                 if ( !$this->skin || !isset( $skinnames[$this->skin] ) ) {
  72                         $this->skin = $wgDefaultSkin;
  73                 }
  74         }
  75
  76         /**
  77          * Expand a string of the form jquery.foo,bar|jquery.ui.baz,quux to
  78          * an array of module names like array( 'jquery.foo', 'jquery.bar',
  79          * 'jquery.ui.baz', 'jquery.ui.quux' )
  80          * @param string $modules Packed module name list
  81          * @return array Array of module names
  82          */
  83         public static function expandModuleNames( $modules ) {
  84                 $retval = array();
  85                 $exploded = explode( '|', $modules );
  86                 foreach ( $exploded as $group ) {
  87                         if ( strpos( $group, ',' ) === false ) {
  88                                 // This is not a set of modules in foo.bar,baz notation
  89                                 // but a single module
  90                                 $retval[] = $group;
  91                         } else {
  92                                 // This is a set of modules in foo.bar,baz notation
  93                                 $pos = strrpos( $group, '.' );
  94                                 if ( $pos === false ) {
  95                                         // Prefixless modules, i.e. without dots
  96                                         $retval = array_merge( $retval, explode( ',', $group ) );
  97                                 } else {
  98                                         // We have a prefix and a bunch of suffixes
  99                                         $prefix = substr( $group, 0, $pos ); // 'foo'
 100                                         $suffixes = explode( ',', substr( $group, $pos + 1 ) ); // array( 'bar', 'baz' )
 101                                         foreach ( $suffixes as $suffix ) {
 102                                                 $retval[] = "$prefix.$suffix";
 103                                         }
 104                                 }
 105                         }
 106                 }
 107                 return $retval;
 108         }
 109
 110         /**
 111          * Return a dummy ResourceLoaderContext object suitable for passing into
 112          * things that don't "really" need a context.
 113          * @return ResourceLoaderContext
 114          */
 115         public static function newDummyContext() {
 116                 return new self( null, new FauxRequest( array() ) );
 117         }
 118
 119         /**
 120          * @return ResourceLoader
 121          */
 122         public function getResourceLoader() {
 123                 return $this->resourceLoader;
 124         }
 125
 126         /**
 127          * @return WebRequest
 128          */
 129         public function getRequest() {
 130                 return $this->request;
 131         }
 132
 133         /**
 134          * @return array
 135          */
 136         public function getModules() {
 137                 return $this->modules;
 138         }
 139
 140         /**
 141          * @return string
 142          */
 143         public function getLanguage() {
 144                 if ( $this->language === null ) {
 145                         // Must be a valid language code after this point (bug 62849)
 146                         $this->language = RequestContext::sanitizeLangCode( $this->request->getVal( 'lang' ) );
 147                 }
 148                 return $this->language;
 149         }
 150
 151         /**
 152          * @return string
 153          */
 154         public function getDirection() {
 155                 if ( $this->direction === null ) {
 156                         $this->direction = $this->request->getVal( 'dir' );
 157                         if ( !$this->direction ) {
 158                                 // Determine directionality based on user language (bug 6100)
 159                                 $this->direction = Language::factory( $this->getLanguage() )->getDir();
 160                         }
 161                 }
 162                 return $this->direction;
 163         }
 164
 165         /**
 166          * @return string|null
 167          */
 168         public function getSkin() {
 169                 return $this->skin;
 170         }
 171
 172         /**
 173          * @return string|null
 174          */
 175         public function getUser() {
 176                 return $this->user;
 177         }
 178
 179         /**
 180          * @return bool
 181          */
 182         public function getDebug() {
 183                 return $this->debug;
 184         }
 185
 186         /**
 187          * @return string|null
 188          */
 189         public function getOnly() {
 190                 return $this->only;
 191         }
 192
 193         /**
 194          * @return string|null
 195          */
 196         public function getVersion() {
 197                 return $this->version;
 198         }
 199
 200         /**
 201          * @return bool
 202          */
 203         public function getRaw() {
 204                 return $this->raw;
 205         }
 206
 207         /**
 208          * @return bool
 209          */
 210         public function shouldIncludeScripts() {
 211                 return is_null( $this->only ) || $this->only === 'scripts';
 212         }
 213
 214         /**
 215          * @return bool
 216          */
 217         public function shouldIncludeStyles() {
 218                 return is_null( $this->only ) || $this->only === 'styles';
 219         }
 220
 221         /**
 222          * @return bool
 223          */
 224         public function shouldIncludeMessages() {
 225                 return is_null( $this->only ) || $this->only === 'messages';
 226         }
 227
 228         /**
 229          * @return string
 230          */
 231         public function getHash() {
 232                 if ( !isset( $this->hash ) ) {
 233                         $this->hash = implode( '|', array(
 234                                 $this->getLanguage(), $this->getDirection(), $this->skin, $this->user,
 235                                 $this->debug, $this->only, $this->version
 236                         ) );
 237                 }
 238                 return $this->hash;
 239         }
 240 }