includes/content/MessageContent.php

   1 <?php
   2 /**
   3  * Wrapper content object allowing to handle a system message as a Content object.
   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 1.21
  21  *
  22  * @file
  23  * @ingroup Content
  24  *
  25  * @author Daniel Kinzler
  26  */
  27
  28 /**
  29  * Wrapper allowing us to handle a system message as a Content object.
  30  * Note that this is generally *not* used to represent content from the
  31  * MediaWiki namespace, and that there is no MessageContentHandler.
  32  * MessageContent is just intended as glue for wrapping a message programmatically.
  33  *
  34  * @ingroup Content
  35  */
  36 class MessageContent extends AbstractContent {
  37
  38         /**
  39          * @var Message
  40          */
  41         protected $mMessage;
  42
  43         /**
  44          * @param Message|string $msg A Message object, or a message key.
  45          * @param string[] $params An optional array of message parameters.
  46          */
  47         public function __construct( $msg, $params = null ) {
  48                 # XXX: messages may be wikitext, html or plain text! and maybe even something else entirely.
  49                 parent::__construct( CONTENT_MODEL_WIKITEXT );
  50
  51                 if ( is_string( $msg ) ) {
  52                         $this->mMessage = wfMessage( $msg );
  53                 } else {
  54                         $this->mMessage = clone $msg;
  55                 }
  56
  57                 if ( $params ) {
  58                         $this->mMessage = $this->mMessage->params( $params );
  59                 }
  60         }
  61
  62         /**
  63          * Fully parse the text from wikitext to HTML.
  64          *
  65          * @return string Parsed HTML.
  66          */
  67         public function getHtml() {
  68                 return $this->mMessage->parse();
  69         }
  70
  71         /**
  72          * Returns the message text. {{-transformation is done.
  73          *
  74          * @return string Unescaped message text.
  75          */
  76         public function getWikitext() {
  77                 return $this->mMessage->text();
  78         }
  79
  80         /**
  81          * Returns the message object, with any parameters already substituted.
  82          *
  83          * @return Message The message object.
  84          */
  85         public function getNativeData() {
  86                 // NOTE: Message objects are mutable. Cloning here makes MessageContent immutable.
  87                 return clone $this->mMessage;
  88         }
  89
  90         /**
  91          * @return string
  92          *
  93          * @see Content::getTextForSearchIndex
  94          */
  95         public function getTextForSearchIndex() {
  96                 return $this->mMessage->plain();
  97         }
  98
  99         /**
 100          * @return string
 101          *
 102          * @see Content::getWikitextForTransclusion
 103          */
 104         public function getWikitextForTransclusion() {
 105                 return $this->getWikitext();
 106         }
 107
 108         /**
 109          * @param int $maxlength Maximum length of the summary text, defaults to 250.
 110          *
 111          * @return string The summary text.
 112          *
 113          * @see Content::getTextForSummary
 114          */
 115         public function getTextForSummary( $maxlength = 250 ) {
 116                 return substr( $this->mMessage->plain(), 0, $maxlength );
 117         }
 118
 119         /**
 120          * @return int
 121          *
 122          * @see Content::getSize
 123          */
 124         public function getSize() {
 125                 return strlen( $this->mMessage->plain() );
 126         }
 127
 128         /**
 129          * @return Content A copy of this object
 130          *
 131          * @see Content::copy
 132          */
 133         public function copy() {
 134                 // MessageContent is immutable (because getNativeData() returns a clone of the Message object)
 135                 return $this;
 136         }
 137
 138         /**
 139          * @param bool|null $hasLinks
 140          *
 141          * @return bool Always false.
 142          *
 143          * @see Content::isCountable
 144          */
 145         public function isCountable( $hasLinks = null ) {
 146                 return false;
 147         }
 148
 149         /**
 150          * @param Title $title Unused.
 151          * @param int $revId Unused.
 152          * @param ParserOptions $options Unused.
 153          * @param bool $generateHtml Whether to generate HTML (default: true).
 154          *
 155          * @return ParserOutput
 156          *
 157          * @see Content::getParserOutput
 158          */
 159         public function getParserOutput( Title $title, $revId = null,
 160                 ParserOptions $options = null, $generateHtml = true ) {
 161                 if ( $generateHtml ) {
 162                         $html = $this->getHtml();
 163                 } else {
 164                         $html = '';
 165                 }
 166
 167                 $po = new ParserOutput( $html );
 168                 // Message objects are in the user language.
 169                 $po->recordOption( 'userlang' );
 170
 171                 return $po;
 172         }
 173
 174 }