includes/context/ContextSource.php

   1 <?php
   2 /**
   3  * Request-dependant objects containers.
   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  * @since 1.18
  21  *
  22  * @author Happy-melon
  23  * @file
  24  */
  25
  26 /**
  27  * The simplest way of implementing IContextSource is to hold a RequestContext as a
  28  * member variable and provide accessors to it.
  29  */
  30 abstract class ContextSource implements IContextSource {
  31         /**
  32          * @var IContextSource
  33          */
  34         private $context;
  35
  36         /**
  37          * Get the base IContextSource object
  38          * @since 1.18
  39          * @return IContextSource
  40          */
  41         public function getContext() {
  42                 if ( $this->context === null ) {
  43                         $class = get_class( $this );
  44                         wfDebug( __METHOD__ . " ($class): called and \$context is null. " .
  45                                 "Using RequestContext::getMain() for sanity\n" );
  46                         $this->context = RequestContext::getMain();
  47                 }
  48
  49                 return $this->context;
  50         }
  51
  52         /**
  53          * Set the IContextSource object
  54          *
  55          * @since 1.18
  56          * @param IContextSource $context
  57          */
  58         public function setContext( IContextSource $context ) {
  59                 $this->context = $context;
  60         }
  61
  62         /**
  63          * Get the Config object
  64          *
  65          * @since 1.23
  66          * @return Config
  67          */
  68         public function getConfig() {
  69                 return $this->getContext()->getConfig();
  70         }
  71
  72         /**
  73          * Get the WebRequest object
  74          *
  75          * @since 1.18
  76          * @return WebRequest
  77          */
  78         public function getRequest() {
  79                 return $this->getContext()->getRequest();
  80         }
  81
  82         /**
  83          * Get the Title object
  84          *
  85          * @since 1.18
  86          * @return Title|null
  87          */
  88         public function getTitle() {
  89                 return $this->getContext()->getTitle();
  90         }
  91
  92         /**
  93          * Check whether a WikiPage object can be get with getWikiPage().
  94          * Callers should expect that an exception is thrown from getWikiPage()
  95          * if this method returns false.
  96          *
  97          * @since 1.19
  98          * @return bool
  99          */
 100         public function canUseWikiPage() {
 101                 return $this->getContext()->canUseWikiPage();
 102         }
 103
 104         /**
 105          * Get the WikiPage object.
 106          * May throw an exception if there's no Title object set or the Title object
 107          * belongs to a special namespace that doesn't have WikiPage, so use first
 108          * canUseWikiPage() to check whether this method can be called safely.
 109          *
 110          * @since 1.19
 111          * @return WikiPage
 112          */
 113         public function getWikiPage() {
 114                 return $this->getContext()->getWikiPage();
 115         }
 116
 117         /**
 118          * Get the OutputPage object
 119          *
 120          * @since 1.18
 121          * @return OutputPage
 122          */
 123         public function getOutput() {
 124                 return $this->getContext()->getOutput();
 125         }
 126
 127         /**
 128          * Get the User object
 129          *
 130          * @since 1.18
 131          * @return User
 132          */
 133         public function getUser() {
 134                 return $this->getContext()->getUser();
 135         }
 136
 137         /**
 138          * Get the Language object
 139          *
 140          * @since 1.19
 141          * @return Language
 142          */
 143         public function getLanguage() {
 144                 return $this->getContext()->getLanguage();
 145         }
 146
 147         /**
 148          * Get the Skin object
 149          *
 150          * @since 1.18
 151          * @return Skin
 152          */
 153         public function getSkin() {
 154                 return $this->getContext()->getSkin();
 155         }
 156
 157         /**
 158          * Get a Message object with context set
 159          * Parameters are the same as wfMessage()
 160          *
 161          * @since 1.18
 162          * @return Message
 163          */
 164         public function msg( /* $args */ ) {
 165                 $args = func_get_args();
 166
 167                 return call_user_func_array( array( $this->getContext(), 'msg' ), $args );
 168         }
 169
 170         /**
 171          * Export the resolved user IP, HTTP headers, user ID, and session ID.
 172          * The result will be reasonably sized to allow for serialization.
 173          *
 174          * @return array
 175          * @since 1.21
 176          */
 177         public function exportSession() {
 178                 return $this->getContext()->exportSession();
 179         }
 180 }