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
  45         /* Methods */
  46
  47         /**
  48          * @param $resourceLoader ResourceLoader
  49          * @param $request WebRequest
  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
  68                 $skinnames = Skin::getSkinNames();
  69                 // If no skin is specified, or we don't recognize the skin, use the default skin
  70                 if ( !$this->skin || !isset( $skinnames[$this->skin] ) ) {
  71                         $this->skin = $wgDefaultSkin;
  72                 }
  73         }
  74
  75         /**
  76          * Expand a string of the form jquery.foo,bar|jquery.ui.baz,quux to
  77          * an array of module names like array( 'jquery.foo', 'jquery.bar',
  78          * 'jquery.ui.baz', 'jquery.ui.quux' )
  79          * @param $modules String Packed module name list
  80          * @return array of module names
  81          */
  82         public static function expandModuleNames( $modules ) {
  83                 $retval = array();
  84                 // For backwards compatibility with an earlier hack, replace ! with .
  85                 $modules = str_replace( '!', '.', $modules );
  86                 $exploded = explode( '|', $modules );
  87                 foreach ( $exploded as $group ) {
  88                         if ( strpos( $group, ',' ) === false ) {
  89                                 // This is not a set of modules in foo.bar,baz notation
  90                                 // but a single module
  91                                 $retval[] = $group;
  92                         } else {
  93                                 // This is a set of modules in foo.bar,baz notation
  94                                 $pos = strrpos( $group, '.' );
  95                                 if ( $pos === false ) {
  96                                         // Prefixless modules, i.e. without dots
  97                                         $retval = explode( ',', $group );
  98                                 } else {
  99                                         // We have a prefix and a bunch of suffixes
 100                                         $prefix = substr( $group, 0, $pos ); // 'foo'
 101                                         $suffixes = explode( ',', substr( $group, $pos + 1 ) ); // array( 'bar', 'baz' )
 102                                         foreach ( $suffixes as $suffix ) {
 103                                                 $retval[] = "$prefix.$suffix";
 104                                         }
 105                                 }
 106                         }
 107                 }
 108                 return $retval;
 109         }
 110
 111         /**
 112          * Return a dummy ResourceLoaderContext object suitable for passing into 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                         global $wgLang;
 146                         $this->language  = $this->request->getVal( 'lang' );
 147                         if ( !$this->language ) {
 148                                 $this->language = $wgLang->getCode();
 149                         }
 150                 }
 151                 return $this->language;
 152         }
 153
 154         /**
 155          * @return string
 156          */
 157         public function getDirection() {
 158                 if ( $this->direction === null ) {
 159                         $this->direction = $this->request->getVal( 'dir' );
 160                         if ( !$this->direction ) {
 161                                 # directionality based on user language (see bug 6100)
 162                                 $this->direction = Language::factory( $this->language )->getDir();
 163                         }
 164                 }
 165                 return $this->direction;
 166         }
 167
 168         /**
 169          * @return string|null
 170          */
 171         public function getSkin() {
 172                 return $this->skin;
 173         }
 174
 175         /**
 176          * @return string|null
 177          */
 178         public function getUser() {
 179                 return $this->user;
 180         }
 181
 182         /**
 183          * @return bool
 184          */
 185         public function getDebug() {
 186                 return $this->debug;
 187         }
 188
 189         /**
 190          * @return String|null
 191          */
 192         public function getOnly() {
 193                 return $this->only;
 194         }
 195
 196         /**
 197          * @return String|null
 198          */
 199         public function getVersion() {
 200                 return $this->version;
 201         }
 202
 203         /**
 204          * @return bool
 205          */
 206         public function shouldIncludeScripts() {
 207                 return is_null( $this->only ) || $this->only === 'scripts';
 208         }
 209
 210         /**
 211          * @return bool
 212          */
 213         public function shouldIncludeStyles() {
 214                 return is_null( $this->only ) || $this->only === 'styles';
 215         }
 216
 217         /**
 218          * @return bool
 219          */
 220         public function shouldIncludeMessages() {
 221                 return is_null( $this->only ) || $this->only === 'messages';
 222         }
 223
 224         /**
 225          * @return string
 226          */
 227         public function getHash() {
 228                 if ( !isset( $this->hash ) ) {
 229                         $this->hash = implode( '|', array(
 230                                 $this->getLanguage(), $this->getDirection(), $this->skin, $this->user,
 231                                 $this->debug, $this->only, $this->version
 232                         ) );
 233                 }
 234                 return $this->hash;
 235         }
 236 }