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