includes/parser/ParserOutput.php

   1 <?php
   2
   3 /**
   4  * Output of the PHP parser.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @ingroup Parser
  23  */
  24 class ParserOutput extends CacheTime {
  25         /**
  26          * @var string $mText The output text
  27          */
  28         public $mText;
  29
  30         /**
  31          * @var array $mLanguageLinks List of the full text of language links,
  32          *  in the order they appear.
  33          */
  34         public $mLanguageLinks;
  35
  36         /**
  37          * @var array $mCategoriesMap of category names to sort keys
  38          */
  39         public $mCategories;
  40
  41         /**
  42          * @var array $mIndicators Page status indicators, usually displayed in top-right corner.
  43          */
  44         public $mIndicators = [];
  45
  46         /**
  47          * @var string $mTitleText Title text of the chosen language variant, as HTML.
  48          */
  49         public $mTitleText;
  50
  51         /**
  52          * @var array $mLinks 2-D map of NS/DBK to ID for the links in the document.
  53          *  ID=zero for broken.
  54          */
  55         public $mLinks = [];
  56
  57         /**
  58          * @var array $mTemplates 2-D map of NS/DBK to ID for the template references.
  59          *  ID=zero for broken.
  60          */
  61         public $mTemplates = [];
  62
  63         /**
  64          * @var array $mTemplateIds 2-D map of NS/DBK to rev ID for the template references.
  65          *  ID=zero for broken.
  66          */
  67         public $mTemplateIds = [];
  68
  69         /**
  70          * @var array $mImages DB keys of the images used, in the array key only
  71          */
  72         public $mImages = [];
  73
  74         /**
  75          * @var array $mFileSearchOptions DB keys of the images used mapped to sha1 and MW timestamp.
  76          */
  77         public $mFileSearchOptions = [];
  78
  79         /**
  80          * @var array $mExternalLinks External link URLs, in the key only.
  81          */
  82         public $mExternalLinks = [];
  83
  84         /**
  85          * @var array $mInterwikiLinks 2-D map of prefix/DBK (in keys only)
  86          *  for the inline interwiki links in the document.
  87          */
  88         public $mInterwikiLinks = [];
  89
  90         /**
  91          * @var bool $mNewSection Show a new section link?
  92          */
  93         public $mNewSection = false;
  94
  95         /**
  96          * @var bool $mHideNewSection Hide the new section link?
  97          */
  98         public $mHideNewSection = false;
  99
 100         /**
 101          * @var bool $mNoGallery No gallery on category page? (__NOGALLERY__).
 102          */
 103         public $mNoGallery = false;
 104
 105         /**
 106          * @var array $mHeadItems Items to put in the <head> section
 107          */
 108         public $mHeadItems = [];
 109
 110         /**
 111          * @var array $mModules Modules to be loaded by ResourceLoader
 112          */
 113         public $mModules = [];
 114
 115         /**
 116          * @var array $mModuleScripts Modules of which only the JS will be loaded by ResourceLoader.
 117          */
 118         public $mModuleScripts = [];
 119
 120         /**
 121          * @var array $mModuleStyles Modules of which only the CSSS will be loaded by ResourceLoader.
 122          */
 123         public $mModuleStyles = [];
 124
 125         /**
 126          * @var array $mJsConfigVars JavaScript config variable for mw.config combined with this page.
 127          */
 128         public $mJsConfigVars = [];
 129
 130         /**
 131          * @var array $mOutputHooks Hook tags as per $wgParserOutputHooks.
 132          */
 133         public $mOutputHooks = [];
 134
 135         /**
 136          * @var array $mWarnings Warning text to be returned to the user.
 137          *  Wikitext formatted, in the key only.
 138          */
 139         public $mWarnings = [];
 140
 141         /**
 142          * @var array $mSections Table of contents
 143          */
 144         public $mSections = [];
 145
 146         /**
 147          * @var bool $mEditSectionTokens prefix/suffix markers if edit sections were output as tokens.
 148          */
 149         public $mEditSectionTokens = false;
 150
 151         /**
 152          * @var array $mProperties Name/value pairs to be cached in the DB.
 153          */
 154         public $mProperties = [];
 155
 156         /**
 157          * @var string $mTOCHTML HTML of the TOC.
 158          */
 159         public $mTOCHTML = '';
 160
 161         /**
 162          * @var string $mTimestamp Timestamp of the revision.
 163          */
 164         public $mTimestamp;
 165
 166         /**
 167          * @var bool $mTOCEnabled Whether TOC should be shown, can't override __NOTOC__.
 168          */
 169         public $mTOCEnabled = true;
 170
 171         /**
 172          * @var bool $mEnableOOUI Whether OOUI should be enabled.
 173          */
 174         public $mEnableOOUI = false;
 175
 176         /**
 177          * @var string $mIndexPolicy 'index' or 'noindex'?  Any other value will result in no change.
 178          */
 179         private $mIndexPolicy = '';
 180
 181         /**
 182          * @var array $mAccessedOptions List of ParserOptions (stored in the keys).
 183          */
 184         private $mAccessedOptions = [];
 185
 186         /**
 187          * @var array $mExtensionData extra data used by extensions.
 188          */
 189         private $mExtensionData = [];
 190
 191         /**
 192          * @var array $mLimitReportData Parser limit report data.
 193          */
 194         private $mLimitReportData = [];
 195
 196         /**
 197          * @var array $mParseStartTime Timestamps for getTimeSinceStart().
 198          */
 199         private $mParseStartTime = [];
 200
 201         /**
 202          * @var bool $mPreventClickjacking Whether to emit X-Frame-Options: DENY.
 203          */
 204         private $mPreventClickjacking = false;
 205
 206         /**
 207          * @var array $mFlags Generic flags.
 208          */
 209         private $mFlags = [];
 210
 211         /** @var integer|null Assumed rev ID for {{REVISIONID}} if no revision is set */
 212         private $mSpeculativeRevId;
 213
 214         const EDITSECTION_REGEX =
 215                 '#<(?:mw:)?editsection page="(.*?)" section="(.*?)"(?:/>|>(.*?)(</(?:mw:)?editsection>))#';
 216
 217         public function __construct( $text = '', $languageLinks = [], $categoryLinks = [],
 218                 $unused = false, $titletext = ''
 219         ) {
 220                 $this->mText = $text;
 221                 $this->mLanguageLinks = $languageLinks;
 222                 $this->mCategories = $categoryLinks;
 223                 $this->mTitleText = $titletext;
 224         }
 225
 226         /**
 227          * Get the cacheable text with <mw:editsection> markers still in it. The
 228          * return value is suitable for writing back via setText() but is not valid
 229          * for display to the user.
 230          *
 231          * @since 1.27
 232          */
 233         public function getRawText() {
 234                 return $this->mText;
 235         }
 236
 237         public function getText() {
 238                 $text = $this->mText;
 239                 if ( $this->mEditSectionTokens ) {
 240                         $text = preg_replace_callback(
 241                                 ParserOutput::EDITSECTION_REGEX,
 242                                 function ( $m ) {
 243                                         global $wgOut, $wgLang;
 244                                         $editsectionPage = Title::newFromText( htmlspecialchars_decode( $m[1] ) );
 245                                         $editsectionSection = htmlspecialchars_decode( $m[2] );
 246                                         $editsectionContent = isset( $m[4] ) ? $m[3] : null;
 247
 248                                         if ( !is_object( $editsectionPage ) ) {
 249                                                 throw new MWException( "Bad parser output text." );
 250                                         }
 251
 252                                         $skin = $wgOut->getSkin();
 253                                         return call_user_func_array(
 254                                                 [ $skin, 'doEditSectionLink' ],
 255                                                 [ $editsectionPage, $editsectionSection,
 256                                                         $editsectionContent, $wgLang->getCode() ]
 257                                         );
 258                                 },
 259                                 $text
 260                         );
 261                 } else {
 262                         $text = preg_replace( ParserOutput::EDITSECTION_REGEX, '', $text );
 263                 }
 264
 265                 // If you have an old cached version of this class - sorry, you can't disable the TOC
 266                 if ( isset( $this->mTOCEnabled ) && $this->mTOCEnabled ) {
 267                         $text = str_replace( [ Parser::TOC_START, Parser::TOC_END ], '', $text );
 268                 } else {
 269                         $text = preg_replace(
 270                                 '#' . preg_quote( Parser::TOC_START, '#' ) . '.*?' . preg_quote( Parser::TOC_END, '#' ) . '#s',
 271                                 '',
 272                                 $text
 273                         );
 274                 }
 275                 return $text;
 276         }
 277
 278         /**
 279          * @param integer $id
 280          * @since 1.28
 281          */
 282         public function setSpeculativeRevIdUsed( $id ) {
 283                 $this->mSpeculativeRevId = $id;
 284         }
 285
 286         /** @since 1.28 */
 287         public function getSpeculativeRevIdUsed() {
 288                 return $this->mSpeculativeRevId;
 289         }
 290
 291         public function &getLanguageLinks() {
 292                 return $this->mLanguageLinks;
 293         }
 294
 295         public function getInterwikiLinks() {
 296                 return $this->mInterwikiLinks;
 297         }
 298
 299         public function getCategoryLinks() {
 300                 return array_keys( $this->mCategories );
 301         }
 302
 303         public function &getCategories() {
 304                 return $this->mCategories;
 305         }
 306
 307         /**
 308          * @since 1.25
 309          */
 310         public function getIndicators() {
 311                 return $this->mIndicators;
 312         }
 313
 314         public function getTitleText() {
 315                 return $this->mTitleText;
 316         }
 317
 318         public function getSections() {
 319                 return $this->mSections;
 320         }
 321
 322         public function getEditSectionTokens() {
 323                 return $this->mEditSectionTokens;
 324         }
 325
 326         public function &getLinks() {
 327                 return $this->mLinks;
 328         }
 329
 330         public function &getTemplates() {
 331                 return $this->mTemplates;
 332         }
 333
 334         public function &getTemplateIds() {
 335                 return $this->mTemplateIds;
 336         }
 337
 338         public function &getImages() {
 339                 return $this->mImages;
 340         }
 341
 342         public function &getFileSearchOptions() {
 343                 return $this->mFileSearchOptions;
 344         }
 345
 346         public function &getExternalLinks() {
 347                 return $this->mExternalLinks;
 348         }
 349
 350         public function getNoGallery() {
 351                 return $this->mNoGallery;
 352         }
 353
 354         public function getHeadItems() {
 355                 return $this->mHeadItems;
 356         }
 357
 358         public function getModules() {
 359                 return $this->mModules;
 360         }
 361
 362         public function getModuleScripts() {
 363                 return $this->mModuleScripts;
 364         }
 365
 366         public function getModuleStyles() {
 367                 return $this->mModuleStyles;
 368         }
 369
 370         /**
 371          * @deprecated since 1.26 Obsolete
 372          * @return array
 373          */
 374         public function getModuleMessages() {
 375                 wfDeprecated( __METHOD__, '1.26' );
 376                 return [];
 377         }
 378
 379         /** @since 1.23 */
 380         public function getJsConfigVars() {
 381                 return $this->mJsConfigVars;
 382         }
 383
 384         public function getOutputHooks() {
 385                 return (array)$this->mOutputHooks;
 386         }
 387
 388         public function getWarnings() {
 389                 return array_keys( $this->mWarnings );
 390         }
 391
 392         public function getIndexPolicy() {
 393                 return $this->mIndexPolicy;
 394         }
 395
 396         public function getTOCHTML() {
 397                 return $this->mTOCHTML;
 398         }
 399
 400         /**
 401          * @return string|null TS_MW timestamp of the revision content
 402          */
 403         public function getTimestamp() {
 404                 return $this->mTimestamp;
 405         }
 406
 407         public function getLimitReportData() {
 408                 return $this->mLimitReportData;
 409         }
 410
 411         public function getTOCEnabled() {
 412                 return $this->mTOCEnabled;
 413         }
 414
 415         public function getEnableOOUI() {
 416                 return $this->mEnableOOUI;
 417         }
 418
 419         public function setText( $text ) {
 420                 return wfSetVar( $this->mText, $text );
 421         }
 422
 423         public function setLanguageLinks( $ll ) {
 424                 return wfSetVar( $this->mLanguageLinks, $ll );
 425         }
 426
 427         public function setCategoryLinks( $cl ) {
 428                 return wfSetVar( $this->mCategories, $cl );
 429         }
 430
 431         public function setTitleText( $t ) {
 432                 return wfSetVar( $this->mTitleText, $t );
 433         }
 434
 435         public function setSections( $toc ) {
 436                 return wfSetVar( $this->mSections, $toc );
 437         }
 438
 439         public function setEditSectionTokens( $t ) {
 440                 return wfSetVar( $this->mEditSectionTokens, $t );
 441         }
 442
 443         public function setIndexPolicy( $policy ) {
 444                 return wfSetVar( $this->mIndexPolicy, $policy );
 445         }
 446
 447         public function setTOCHTML( $tochtml ) {
 448                 return wfSetVar( $this->mTOCHTML, $tochtml );
 449         }
 450
 451         public function setTimestamp( $timestamp ) {
 452                 return wfSetVar( $this->mTimestamp, $timestamp );
 453         }
 454
 455         public function setTOCEnabled( $flag ) {
 456                 return wfSetVar( $this->mTOCEnabled, $flag );
 457         }
 458
 459         public function addCategory( $c, $sort ) {
 460                 $this->mCategories[$c] = $sort;
 461         }
 462
 463         /**
 464          * @since 1.25
 465          */
 466         public function setIndicator( $id, $content ) {
 467                 $this->mIndicators[$id] = $content;
 468         }
 469
 470         /**
 471          * Enables OOUI, if true, in any OutputPage instance this ParserOutput
 472          * object is added to.
 473          *
 474          * @since 1.26
 475          * @param bool $enable If OOUI should be enabled or not
 476          */
 477         public function setEnableOOUI( $enable = false ) {
 478                 $this->mEnableOOUI = $enable;
 479         }
 480
 481         public function addLanguageLink( $t ) {
 482                 $this->mLanguageLinks[] = $t;
 483         }
 484
 485         public function addWarning( $s ) {
 486                 $this->mWarnings[$s] = 1;
 487         }
 488
 489         public function addOutputHook( $hook, $data = false ) {
 490                 $this->mOutputHooks[] = [ $hook, $data ];
 491         }
 492
 493         public function setNewSection( $value ) {
 494                 $this->mNewSection = (bool)$value;
 495         }
 496         public function hideNewSection( $value ) {
 497                 $this->mHideNewSection = (bool)$value;
 498         }
 499         public function getHideNewSection() {
 500                 return (bool)$this->mHideNewSection;
 501         }
 502         public function getNewSection() {
 503                 return (bool)$this->mNewSection;
 504         }
 505
 506         /**
 507          * Checks, if a url is pointing to the own server
 508          *
 509          * @param string $internal The server to check against
 510          * @param string $url The url to check
 511          * @return bool
 512          */
 513         public static function isLinkInternal( $internal, $url ) {
 514                 return (bool)preg_match( '/^' .
 515                         # If server is proto relative, check also for http/https links
 516                         ( substr( $internal, 0, 2 ) === '//' ? '(?:https?:)?' : '' ) .
 517                         preg_quote( $internal, '/' ) .
 518                         # check for query/path/anchor or end of link in each case
 519                         '(?:[\?\/\#]|$)/i',
 520                         $url
 521                 );
 522         }
 523
 524         public function addExternalLink( $url ) {
 525                 # We don't register links pointing to our own server, unless... :-)
 526                 global $wgServer, $wgRegisterInternalExternals;
 527
 528                 $registerExternalLink = true;
 529                 if ( !$wgRegisterInternalExternals ) {
 530                         $registerExternalLink = !self::isLinkInternal( $wgServer, $url );
 531                 }
 532                 if ( $registerExternalLink ) {
 533                         $this->mExternalLinks[$url] = 1;
 534                 }
 535         }
 536
 537         /**
 538          * Record a local or interwiki inline link for saving in future link tables.
 539          *
 540          * @param Title $title
 541          * @param int|null $id Optional known page_id so we can skip the lookup
 542          */
 543         public function addLink( Title $title, $id = null ) {
 544                 if ( $title->isExternal() ) {
 545                         // Don't record interwikis in pagelinks
 546                         $this->addInterwikiLink( $title );
 547                         return;
 548                 }
 549                 $ns = $title->getNamespace();
 550                 $dbk = $title->getDBkey();
 551                 if ( $ns == NS_MEDIA ) {
 552                         // Normalize this pseudo-alias if it makes it down here...
 553                         $ns = NS_FILE;
 554                 } elseif ( $ns == NS_SPECIAL ) {
 555                         // We don't record Special: links currently
 556                         // It might actually be wise to, but we'd need to do some normalization.
 557                         return;
 558                 } elseif ( $dbk === '' ) {
 559                         // Don't record self links -  [[#Foo]]
 560                         return;
 561                 }
 562                 if ( !isset( $this->mLinks[$ns] ) ) {
 563                         $this->mLinks[$ns] = [];
 564                 }
 565                 if ( is_null( $id ) ) {
 566                         $id = $title->getArticleID();
 567                 }
 568                 $this->mLinks[$ns][$dbk] = $id;
 569         }
 570
 571         /**
 572          * Register a file dependency for this output
 573          * @param string $name Title dbKey
 574          * @param string $timestamp MW timestamp of file creation (or false if non-existing)
 575          * @param string $sha1 Base 36 SHA-1 of file (or false if non-existing)
 576          * @return void
 577          */
 578         public function addImage( $name, $timestamp = null, $sha1 = null ) {
 579                 $this->mImages[$name] = 1;
 580                 if ( $timestamp !== null && $sha1 !== null ) {
 581                         $this->mFileSearchOptions[$name] = [ 'time' => $timestamp, 'sha1' => $sha1 ];
 582                 }
 583         }
 584
 585         /**
 586          * Register a template dependency for this output
 587          * @param Title $title
 588          * @param int $page_id
 589          * @param int $rev_id
 590          * @return void
 591          */
 592         public function addTemplate( $title, $page_id, $rev_id ) {
 593                 $ns = $title->getNamespace();
 594                 $dbk = $title->getDBkey();
 595                 if ( !isset( $this->mTemplates[$ns] ) ) {
 596                         $this->mTemplates[$ns] = [];
 597                 }
 598                 $this->mTemplates[$ns][$dbk] = $page_id;
 599                 if ( !isset( $this->mTemplateIds[$ns] ) ) {
 600                         $this->mTemplateIds[$ns] = [];
 601                 }
 602                 $this->mTemplateIds[$ns][$dbk] = $rev_id; // For versioning
 603         }
 604
 605         /**
 606          * @param Title $title Title object, must be an interwiki link
 607          * @throws MWException If given invalid input
 608          */
 609         public function addInterwikiLink( $title ) {
 610                 if ( !$title->isExternal() ) {
 611                         throw new MWException( 'Non-interwiki link passed, internal parser error.' );
 612                 }
 613                 $prefix = $title->getInterwiki();
 614                 if ( !isset( $this->mInterwikiLinks[$prefix] ) ) {
 615                         $this->mInterwikiLinks[$prefix] = [];
 616                 }
 617                 $this->mInterwikiLinks[$prefix][$title->getDBkey()] = 1;
 618         }
 619
 620         /**
 621          * Add some text to the "<head>".
 622          * If $tag is set, the section with that tag will only be included once
 623          * in a given page.
 624          * @param string $section
 625          * @param string|bool $tag
 626          */
 627         public function addHeadItem( $section, $tag = false ) {
 628                 if ( $tag !== false ) {
 629                         $this->mHeadItems[$tag] = $section;
 630                 } else {
 631                         $this->mHeadItems[] = $section;
 632                 }
 633         }
 634
 635         public function addModules( $modules ) {
 636                 $this->mModules = array_merge( $this->mModules, (array)$modules );
 637         }
 638
 639         public function addModuleScripts( $modules ) {
 640                 $this->mModuleScripts = array_merge( $this->mModuleScripts, (array)$modules );
 641         }
 642
 643         public function addModuleStyles( $modules ) {
 644                 $this->mModuleStyles = array_merge( $this->mModuleStyles, (array)$modules );
 645         }
 646
 647         /**
 648          * @deprecated since 1.26 Use addModules() instead
 649          * @param string|array $modules
 650          */
 651         public function addModuleMessages( $modules ) {
 652                 wfDeprecated( __METHOD__, '1.26' );
 653         }
 654
 655         /**
 656          * Add one or more variables to be set in mw.config in JavaScript.
 657          *
 658          * @param string|array $keys Key or array of key/value pairs.
 659          * @param mixed $value [optional] Value of the configuration variable.
 660          * @since 1.23
 661          */
 662         public function addJsConfigVars( $keys, $value = null ) {
 663                 if ( is_array( $keys ) ) {
 664                         foreach ( $keys as $key => $value ) {
 665                                 $this->mJsConfigVars[$key] = $value;
 666                         }
 667                         return;
 668                 }
 669
 670                 $this->mJsConfigVars[$keys] = $value;
 671         }
 672
 673         /**
 674          * Copy items from the OutputPage object into this one
 675          *
 676          * @param OutputPage $out
 677          */
 678         public function addOutputPageMetadata( OutputPage $out ) {
 679                 $this->addModules( $out->getModules() );
 680                 $this->addModuleScripts( $out->getModuleScripts() );
 681                 $this->addModuleStyles( $out->getModuleStyles() );
 682                 $this->addJsConfigVars( $out->getJsConfigVars() );
 683
 684                 $this->mHeadItems = array_merge( $this->mHeadItems, $out->getHeadItemsArray() );
 685                 $this->mPreventClickjacking = $this->mPreventClickjacking || $out->getPreventClickjacking();
 686         }
 687
 688         /**
 689          * Add a tracking category, getting the title from a system message,
 690          * or print a debug message if the title is invalid.
 691          *
 692          * Any message used with this function should be registered so it will
 693          * show up on Special:TrackingCategories. Core messages should be added
 694          * to SpecialTrackingCategories::$coreTrackingCategories, and extensions
 695          * should add to "TrackingCategories" in their extension.json.
 696          *
 697          * @param string $msg Message key
 698          * @param Title $title title of the page which is being tracked
 699          * @return bool Whether the addition was successful
 700          * @since 1.25
 701          */
 702         public function addTrackingCategory( $msg, $title ) {
 703                 if ( $title->getNamespace() === NS_SPECIAL ) {
 704                         wfDebug( __METHOD__ . ": Not adding tracking category $msg to special page!\n" );
 705                         return false;
 706                 }
 707
 708                 // Important to parse with correct title (bug 31469)
 709                 $cat = wfMessage( $msg )
 710                         ->title( $title )
 711                         ->inContentLanguage()
 712                         ->text();
 713
 714                 # Allow tracking categories to be disabled by setting them to "-"
 715                 if ( $cat === '-' ) {
 716                         return false;
 717                 }
 718
 719                 $containerCategory = Title::makeTitleSafe( NS_CATEGORY, $cat );
 720                 if ( $containerCategory ) {
 721                         $this->addCategory( $containerCategory->getDBkey(), $this->getProperty( 'defaultsort' ) ?: '' );
 722                         return true;
 723                 } else {
 724                         wfDebug( __METHOD__ . ": [[MediaWiki:$msg]] is not a valid title!\n" );
 725                         return false;
 726                 }
 727         }
 728
 729         /**
 730          * Override the title to be used for display
 731          *
 732          * @note this is assumed to have been validated
 733          * (check equal normalisation, etc.)
 734          *
 735          * @note this is expected to be safe HTML,
 736          * ready to be served to the client.
 737          *
 738          * @param string $text Desired title text
 739          */
 740         public function setDisplayTitle( $text ) {
 741                 $this->setTitleText( $text );
 742                 $this->setProperty( 'displaytitle', $text );
 743         }
 744
 745         /**
 746          * Get the title to be used for display.
 747          *
 748          * As per the contract of setDisplayTitle(), this is safe HTML,
 749          * ready to be served to the client.
 750          *
 751          * @return string HTML
 752          */
 753         public function getDisplayTitle() {
 754                 $t = $this->getTitleText();
 755                 if ( $t === '' ) {
 756                         return false;
 757                 }
 758                 return $t;
 759         }
 760
 761         /**
 762          * Fairly generic flag setter thingy.
 763          * @param string $flag
 764          */
 765         public function setFlag( $flag ) {
 766                 $this->mFlags[$flag] = true;
 767         }
 768
 769         public function getFlag( $flag ) {
 770                 return isset( $this->mFlags[$flag] );
 771         }
 772
 773         /**
 774          * Set a property to be stored in the page_props database table.
 775          *
 776          * page_props is a key value store indexed by the page ID. This allows
 777          * the parser to set a property on a page which can then be quickly
 778          * retrieved given the page ID or via a DB join when given the page
 779          * title.
 780          *
 781          * Since 1.23, page_props are also indexed by numeric value, to allow
 782          * for efficient "top k" queries of pages wrt a given property.
 783          *
 784          * setProperty() is thus used to propagate properties from the parsed
 785          * page to request contexts other than a page view of the currently parsed
 786          * article.
 787          *
 788          * Some applications examples:
 789          *
 790          *   * To implement hidden categories, hiding pages from category listings
 791          *     by storing a property.
 792          *
 793          *   * Overriding the displayed article title.
 794          *   @see ParserOutput::setDisplayTitle()
 795          *
 796          *   * To implement image tagging, for example displaying an icon on an
 797          *     image thumbnail to indicate that it is listed for deletion on
 798          *     Wikimedia Commons.
 799          *     This is not actually implemented, yet but would be pretty cool.
 800          *
 801          * @note Do not use setProperty() to set a property which is only used
 802          * in a context where the ParserOutput object itself is already available,
 803          * for example a normal page view. There is no need to save such a property
 804          * in the database since the text is already parsed. You can just hook
 805          * OutputPageParserOutput and get your data out of the ParserOutput object.
 806          *
 807          * If you are writing an extension where you want to set a property in the
 808          * parser which is used by an OutputPageParserOutput hook, you have to
 809          * associate the extension data directly with the ParserOutput object.
 810          * Since MediaWiki 1.21, you can use setExtensionData() to do this:
 811          *
 812          * @par Example:
 813          * @code
 814          *    $parser->getOutput()->setExtensionData( 'my_ext_foo', '...' );
 815          * @endcode
 816          *
 817          * And then later, in OutputPageParserOutput or similar:
 818          *
 819          * @par Example:
 820          * @code
 821          *    $output->getExtensionData( 'my_ext_foo' );
 822          * @endcode
 823          *
 824          * In MediaWiki 1.20 and older, you have to use a custom member variable
 825          * within the ParserOutput object:
 826          *
 827          * @par Example:
 828          * @code
 829          *    $parser->getOutput()->my_ext_foo = '...';
 830          * @endcode
 831          *
 832          */
 833         public function setProperty( $name, $value ) {
 834                 $this->mProperties[$name] = $value;
 835         }
 836
 837         /**
 838          * @param string $name The property name to look up.
 839          *
 840          * @return mixed|bool The value previously set using setProperty(). False if null or no value
 841          * was set for the given property name.
 842          *
 843          * @note You need to use getProperties() to check for boolean and null properties.
 844          */
 845         public function getProperty( $name ) {
 846                 return isset( $this->mProperties[$name] ) ? $this->mProperties[$name] : false;
 847         }
 848
 849         public function unsetProperty( $name ) {
 850                 unset( $this->mProperties[$name] );
 851         }
 852
 853         public function getProperties() {
 854                 if ( !isset( $this->mProperties ) ) {
 855                         $this->mProperties = [];
 856                 }
 857                 return $this->mProperties;
 858         }
 859
 860         /**
 861          * Returns the options from its ParserOptions which have been taken
 862          * into account to produce this output or false if not available.
 863          * @return array
 864          */
 865         public function getUsedOptions() {
 866                 if ( !isset( $this->mAccessedOptions ) ) {
 867                         return [];
 868                 }
 869                 return array_keys( $this->mAccessedOptions );
 870         }
 871
 872         /**
 873          * Tags a parser option for use in the cache key for this parser output.
 874          * Registered as a watcher at ParserOptions::registerWatcher() by Parser::clearState().
 875          * The information gathered here is available via getUsedOptions(),
 876          * and is used by ParserCache::save().
 877          *
 878          * @see ParserCache::getKey
 879          * @see ParserCache::save
 880          * @see ParserOptions::addExtraKey
 881          * @see ParserOptions::optionsHash
 882          * @param string $option
 883          */
 884         public function recordOption( $option ) {
 885                 $this->mAccessedOptions[$option] = true;
 886         }
 887
 888         /**
 889          * Attaches arbitrary data to this ParserObject. This can be used to store some information in
 890          * the ParserOutput object for later use during page output. The data will be cached along with
 891          * the ParserOutput object, but unlike data set using setProperty(), it is not recorded in the
 892          * database.
 893          *
 894          * This method is provided to overcome the unsafe practice of attaching extra information to a
 895          * ParserObject by directly assigning member variables.
 896          *
 897          * To use setExtensionData() to pass extension information from a hook inside the parser to a
 898          * hook in the page output, use this in the parser hook:
 899          *
 900          * @par Example:
 901          * @code
 902          *    $parser->getOutput()->setExtensionData( 'my_ext_foo', '...' );
 903          * @endcode
 904          *
 905          * And then later, in OutputPageParserOutput or similar:
 906          *
 907          * @par Example:
 908          * @code
 909          *    $output->getExtensionData( 'my_ext_foo' );
 910          * @endcode
 911          *
 912          * In MediaWiki 1.20 and older, you have to use a custom member variable
 913          * within the ParserOutput object:
 914          *
 915          * @par Example:
 916          * @code
 917          *    $parser->getOutput()->my_ext_foo = '...';
 918          * @endcode
 919          *
 920          * @since 1.21
 921          *
 922          * @param string $key The key for accessing the data. Extensions should take care to avoid
 923          *   conflicts in naming keys. It is suggested to use the extension's name as a prefix.
 924          *
 925          * @param mixed $value The value to set. Setting a value to null is equivalent to removing
 926          *   the value.
 927          */
 928         public function setExtensionData( $key, $value ) {
 929                 if ( $value === null ) {
 930                         unset( $this->mExtensionData[$key] );
 931                 } else {
 932                         $this->mExtensionData[$key] = $value;
 933                 }
 934         }
 935
 936         /**
 937          * Gets extensions data previously attached to this ParserOutput using setExtensionData().
 938          * Typically, such data would be set while parsing the page, e.g. by a parser function.
 939          *
 940          * @since 1.21
 941          *
 942          * @param string $key The key to look up.
 943          *
 944          * @return mixed|null The value previously set for the given key using setExtensionData()
 945          *         or null if no value was set for this key.
 946          */
 947         public function getExtensionData( $key ) {
 948                 if ( isset( $this->mExtensionData[$key] ) ) {
 949                         return $this->mExtensionData[$key];
 950                 }
 951
 952                 return null;
 953         }
 954
 955         private static function getTimes( $clock = null ) {
 956                 $ret = [];
 957                 if ( !$clock || $clock === 'wall' ) {
 958                         $ret['wall'] = microtime( true );
 959                 }
 960                 if ( !$clock || $clock === 'cpu' ) {
 961                         $ru = wfGetRusage();
 962                         if ( $ru ) {
 963                                 $ret['cpu'] = $ru['ru_utime.tv_sec'] + $ru['ru_utime.tv_usec'] / 1e6;
 964                                 $ret['cpu'] += $ru['ru_stime.tv_sec'] + $ru['ru_stime.tv_usec'] / 1e6;
 965                         }
 966                 }
 967                 return $ret;
 968         }
 969
 970         /**
 971          * Resets the parse start timestamps for future calls to getTimeSinceStart()
 972          * @since 1.22
 973          */
 974         public function resetParseStartTime() {
 975                 $this->mParseStartTime = self::getTimes();
 976         }
 977
 978         /**
 979          * Returns the time since resetParseStartTime() was last called
 980          *
 981          * Clocks available are:
 982          *  - wall: Wall clock time
 983          *  - cpu: CPU time (requires getrusage)
 984          *
 985          * @since 1.22
 986          * @param string $clock
 987          * @return float|null
 988          */
 989         public function getTimeSinceStart( $clock ) {
 990                 if ( !isset( $this->mParseStartTime[$clock] ) ) {
 991                         return null;
 992                 }
 993
 994                 $end = self::getTimes( $clock );
 995                 return $end[$clock] - $this->mParseStartTime[$clock];
 996         }
 997
 998         /**
 999          * Sets parser limit report data for a key
1000          *
1001          * The key is used as the prefix for various messages used for formatting:
1002          *  - $key: The label for the field in the limit report
1003          *  - $key-value-text: Message used to format the value in the "NewPP limit
1004          *      report" HTML comment. If missing, uses $key-format.
1005          *  - $key-value-html: Message used to format the value in the preview
1006          *      limit report table. If missing, uses $key-format.
1007          *  - $key-value: Message used to format the value. If missing, uses "$1".
1008          *
1009          * Note that all values are interpreted as wikitext, and so should be
1010          * encoded with htmlspecialchars() as necessary, but should avoid complex
1011          * HTML for sanity of display in the "NewPP limit report" comment.
1012          *
1013          * @since 1.22
1014          * @param string $key Message key
1015          * @param mixed $value Appropriate for Message::params()
1016          */
1017         public function setLimitReportData( $key, $value ) {
1018                 $this->mLimitReportData[$key] = $value;
1019         }
1020
1021         /**
1022          * Check whether the cache TTL was lowered due to dynamic content
1023          *
1024          * When content is determined by more than hard state (e.g. page edits),
1025          * such as template/file transclusions based on the current timestamp or
1026          * extension tags that generate lists based on queries, this return true.
1027          *
1028          * @return bool
1029          * @since 1.25
1030          */
1031         public function hasDynamicContent() {
1032                 global $wgParserCacheExpireTime;
1033
1034                 return $this->getCacheExpiry() < $wgParserCacheExpireTime;
1035         }
1036
1037         /**
1038          * Get or set the prevent-clickjacking flag
1039          *
1040          * @since 1.24
1041          * @param bool|null $flag New flag value, or null to leave it unchanged
1042          * @return bool Old flag value
1043          */
1044         public function preventClickjacking( $flag = null ) {
1045                 return wfSetVar( $this->mPreventClickjacking, $flag );
1046         }
1047
1048         /**
1049          * Save space for serialization by removing useless values
1050          * @return array
1051          */
1052         public function __sleep() {
1053                 return array_diff(
1054                         array_keys( get_object_vars( $this ) ),
1055                         [ 'mParseStartTime' ]
1056                 );
1057         }
1058 }