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