includes/content/WikitextContent.php

   1 <?php
   2 /**
   3  * Content object for wiki text pages.
   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  * Content object for wiki text pages.
  30  *
  31  * @ingroup Content
  32  */
  33 class WikitextContent extends TextContent {
  34         private $redirectTargetAndText = null;
  35
  36         public function __construct( $text ) {
  37                 parent::__construct( $text, CONTENT_MODEL_WIKITEXT );
  38         }
  39
  40         /**
  41          * @param string|number $sectionId
  42          *
  43          * @return Content|bool|null
  44          *
  45          * @see Content::getSection()
  46          */
  47         public function getSection( $sectionId ) {
  48                 global $wgParser;
  49
  50                 $text = $this->getNativeData();
  51                 $sect = $wgParser->getSection( $text, $sectionId, false );
  52
  53                 if ( $sect === false ) {
  54                         return false;
  55                 } else {
  56                         return new static( $sect );
  57                 }
  58         }
  59
  60         /**
  61          * @param string|number|null|bool $sectionId
  62          * @param Content $with
  63          * @param string $sectionTitle
  64          *
  65          * @throws MWException
  66          * @return Content
  67          *
  68          * @see Content::replaceSection()
  69          */
  70         public function replaceSection( $sectionId, Content $with, $sectionTitle = '' ) {
  71
  72                 $myModelId = $this->getModel();
  73                 $sectionModelId = $with->getModel();
  74
  75                 if ( $sectionModelId != $myModelId ) {
  76                         throw new MWException( "Incompatible content model for section: " .
  77                                 "document uses $myModelId but " .
  78                                 "section uses $sectionModelId." );
  79                 }
  80
  81                 $oldtext = $this->getNativeData();
  82                 $text = $with->getNativeData();
  83
  84                 if ( strval( $sectionId ) === '' ) {
  85                         return $with; # XXX: copy first?
  86                 }
  87
  88                 if ( $sectionId === 'new' ) {
  89                         # Inserting a new section
  90                         $subject = $sectionTitle ? wfMessage( 'newsectionheaderdefaultlevel' )
  91                                         ->rawParams( $sectionTitle )->inContentLanguage()->text() . "\n\n" : '';
  92                         if ( Hooks::run( 'PlaceNewSection', array( $this, $oldtext, $subject, &$text ) ) ) {
  93                                 $text = strlen( trim( $oldtext ) ) > 0
  94                                         ? "{$oldtext}\n\n{$subject}{$text}"
  95                                         : "{$subject}{$text}";
  96                         }
  97                 } else {
  98                         # Replacing an existing section; roll out the big guns
  99                         global $wgParser;
 100
 101                         $text = $wgParser->replaceSection( $oldtext, $sectionId, $text );
 102                 }
 103
 104                 $newContent = new static( $text );
 105
 106                 return $newContent;
 107         }
 108
 109         /**
 110          * Returns a new WikitextContent object with the given section heading
 111          * prepended.
 112          *
 113          * @param string $header
 114          *
 115          * @return Content
 116          */
 117         public function addSectionHeader( $header ) {
 118                 $text = wfMessage( 'newsectionheaderdefaultlevel' )
 119                         ->rawParams( $header )->inContentLanguage()->text();
 120                 $text .= "\n\n";
 121                 $text .= $this->getNativeData();
 122
 123                 return new static( $text );
 124         }
 125
 126         /**
 127          * Returns a Content object with pre-save transformations applied using
 128          * Parser::preSaveTransform().
 129          *
 130          * @param Title $title
 131          * @param User $user
 132          * @param ParserOptions $popts
 133          *
 134          * @return Content
 135          */
 136         public function preSaveTransform( Title $title, User $user, ParserOptions $popts ) {
 137                 global $wgParser;
 138
 139                 $text = $this->getNativeData();
 140                 $pst = $wgParser->preSaveTransform( $text, $title, $user, $popts );
 141                 rtrim( $pst );
 142
 143                 return ( $text === $pst ) ? $this : new static( $pst );
 144         }
 145
 146         /**
 147          * Returns a Content object with preload transformations applied (or this
 148          * object if no transformations apply).
 149          *
 150          * @param Title $title
 151          * @param ParserOptions $popts
 152          * @param array $params
 153          *
 154          * @return Content
 155          */
 156         public function preloadTransform( Title $title, ParserOptions $popts, $params = array() ) {
 157                 global $wgParser;
 158
 159                 $text = $this->getNativeData();
 160                 $plt = $wgParser->getPreloadText( $text, $title, $popts, $params );
 161
 162                 return new static( $plt );
 163         }
 164
 165         /**
 166          * Extract the redirect target and the remaining text on the page.
 167          *
 168          * @note migrated here from Title::newFromRedirectInternal()
 169          *
 170          * @since 1.23
 171          *
 172          * @return array List of two elements: Title|null and string.
 173          */
 174         protected function getRedirectTargetAndText() {
 175                 global $wgMaxRedirects;
 176
 177                 if ( $this->redirectTargetAndText !== null ) {
 178                         return $this->redirectTargetAndText;
 179                 }
 180
 181                 if ( $wgMaxRedirects < 1 ) {
 182                         // redirects are disabled, so quit early
 183                         $this->redirectTargetAndText = array( null, $this->getNativeData() );
 184                         return $this->redirectTargetAndText;
 185                 }
 186
 187                 $redir = MagicWord::get( 'redirect' );
 188                 $text = ltrim( $this->getNativeData() );
 189                 if ( $redir->matchStartAndRemove( $text ) ) {
 190                         // Extract the first link and see if it's usable
 191                         // Ensure that it really does come directly after #REDIRECT
 192                         // Some older redirects included a colon, so don't freak about that!
 193                         $m = array();
 194                         if ( preg_match( '!^\s*:?\s*\[{2}(.*?)(?:\|.*?)?\]{2}\s*!', $text, $m ) ) {
 195                                 // Strip preceding colon used to "escape" categories, etc.
 196                                 // and URL-decode links
 197                                 if ( strpos( $m[1], '%' ) !== false ) {
 198                                         // Match behavior of inline link parsing here;
 199                                         $m[1] = rawurldecode( ltrim( $m[1], ':' ) );
 200                                 }
 201                                 $title = Title::newFromText( $m[1] );
 202                                 // If the title is a redirect to bad special pages or is invalid, return null
 203                                 if ( !$title instanceof Title || !$title->isValidRedirectTarget() ) {
 204                                         $this->redirectTargetAndText = array( null, $this->getNativeData() );
 205                                         return $this->redirectTargetAndText;
 206                                 }
 207
 208                                 $this->redirectTargetAndText = array( $title, substr( $text, strlen( $m[0] ) ) );
 209                                 return $this->redirectTargetAndText;
 210                         }
 211                 }
 212
 213                 $this->redirectTargetAndText = array( null, $this->getNativeData() );
 214                 return $this->redirectTargetAndText;
 215         }
 216
 217         /**
 218          * Implement redirect extraction for wikitext.
 219          *
 220          * @return Title|null
 221          *
 222          * @see Content::getRedirectTarget
 223          */
 224         public function getRedirectTarget() {
 225                 list( $title, ) = $this->getRedirectTargetAndText();
 226
 227                 return $title;
 228         }
 229
 230         /**
 231          * This implementation replaces the first link on the page with the given new target
 232          * if this Content object is a redirect. Otherwise, this method returns $this.
 233          *
 234          * @since 1.21
 235          *
 236          * @param Title $target
 237          *
 238          * @return Content
 239          *
 240          * @see Content::updateRedirect()
 241          */
 242         public function updateRedirect( Title $target ) {
 243                 if ( !$this->isRedirect() ) {
 244                         return $this;
 245                 }
 246
 247                 # Fix the text
 248                 # Remember that redirect pages can have categories, templates, etc.,
 249                 # so the regex has to be fairly general
 250                 $newText = preg_replace( '/ \[ \[  [^\]]*  \] \] /x',
 251                         '[[' . $target->getFullText() . ']]',
 252                         $this->getNativeData(), 1 );
 253
 254                 return new static( $newText );
 255         }
 256
 257         /**
 258          * Returns true if this content is not a redirect, and this content's text
 259          * is countable according to the criteria defined by $wgArticleCountMethod.
 260          *
 261          * @param bool $hasLinks If it is known whether this content contains
 262          *    links, provide this information here, to avoid redundant parsing to
 263          *    find out (default: null).
 264          * @param Title $title Optional title, defaults to the title from the current main request.
 265          *
 266          * @return bool
 267          */
 268         public function isCountable( $hasLinks = null, Title $title = null ) {
 269                 global $wgArticleCountMethod;
 270
 271                 if ( $this->isRedirect() ) {
 272                         return false;
 273                 }
 274
 275                 switch ( $wgArticleCountMethod ) {
 276                         case 'any':
 277                                 return true;
 278                         case 'comma':
 279                                 $text = $this->getNativeData();
 280                                 return strpos( $text, ',' ) !== false;
 281                         case 'link':
 282                                 if ( $hasLinks === null ) { # not known, find out
 283                                         if ( !$title ) {
 284                                                 $context = RequestContext::getMain();
 285                                                 $title = $context->getTitle();
 286                                         }
 287
 288                                         $po = $this->getParserOutput( $title, null, null, false );
 289                                         $links = $po->getLinks();
 290                                         $hasLinks = !empty( $links );
 291                                 }
 292
 293                                 return $hasLinks;
 294                 }
 295
 296                 return false;
 297         }
 298
 299         /**
 300          * @param int $maxlength
 301          * @return string
 302          */
 303         public function getTextForSummary( $maxlength = 250 ) {
 304                 $truncatedtext = parent::getTextForSummary( $maxlength );
 305
 306                 # clean up unfinished links
 307                 # XXX: make this optional? wasn't there in autosummary, but required for
 308                 # deletion summary.
 309                 $truncatedtext = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $truncatedtext );
 310
 311                 return $truncatedtext;
 312         }
 313
 314         /**
 315          * Returns a ParserOutput object resulting from parsing the content's text
 316          * using $wgParser.
 317          *
 318          * @param Title $title
 319          * @param int $revId Revision to pass to the parser (default: null)
 320          * @param ParserOptions $options (default: null)
 321          * @param bool $generateHtml (default: true)
 322          * @param ParserOutput &$output ParserOutput representing the HTML form of the text,
 323          *           may be manipulated or replaced.
 324          */
 325         protected function fillParserOutput( Title $title, $revId,
 326                         ParserOptions $options, $generateHtml, ParserOutput &$output
 327         ) {
 328                 global $wgParser;
 329
 330                 list( $redir, $text ) = $this->getRedirectTargetAndText();
 331                 $output = $wgParser->parse( $text, $title, $options, true, true, $revId );
 332
 333                 // Add redirect indicator at the top
 334                 if ( $redir ) {
 335                         // Make sure to include the redirect link in pagelinks
 336                         $output->addLink( $redir );
 337                         if ( $generateHtml ) {
 338                                 $chain = $this->getRedirectChain();
 339                                 $output->setText(
 340                                         Article::getRedirectHeaderHtml( $title->getPageLanguage(), $chain, false ) .
 341                                         $output->getText()
 342                                 );
 343                                 $output->addModuleStyles( 'mediawiki.action.view.redirectPage' );
 344                         }
 345                 }
 346         }
 347
 348         /**
 349          * @throws MWException
 350          */
 351         protected function getHtml() {
 352                 throw new MWException(
 353                         "getHtml() not implemented for wikitext. "
 354                                 . "Use getParserOutput()->getText()."
 355                 );
 356         }
 357
 358         /**
 359          * This implementation calls $word->match() on the this TextContent object's text.
 360          *
 361          * @param MagicWord $word
 362          *
 363          * @return bool
 364          *
 365          * @see Content::matchMagicWord()
 366          */
 367         public function matchMagicWord( MagicWord $word ) {
 368                 return $word->match( $this->getNativeData() );
 369         }
 370
 371 }