includes/parser/ParserOptions.php

   1 <?php
   2 /**
   3  * Options for the PHP parser
   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  * @file
  21  * @ingroup Parser
  22  */
  23
  24 /**
  25  * \brief Set options of the Parser
  26  *
  27  * All member variables are supposed to be private in theory, although in practise this is not the case.
  28  *
  29  * @ingroup Parser
  30  */
  31 class ParserOptions {
  32
  33         /**
  34          * Interlanguage links are removed and returned in an array
  35          */
  36         var $mInterwikiMagic;
  37
  38         /**
  39          * Allow external images inline?
  40          */
  41         var $mAllowExternalImages;
  42
  43         /**
  44          * If not, any exception?
  45          */
  46         var $mAllowExternalImagesFrom;
  47
  48         /**
  49          * If not or it doesn't match, should we check an on-wiki whitelist?
  50          */
  51         var $mEnableImageWhitelist;
  52
  53         /**
  54          * Date format index
  55          */
  56         var $mDateFormat = null;
  57
  58         /**
  59          * Create "edit section" links?
  60          */
  61         var $mEditSection = true;
  62
  63         /**
  64          * Allow inclusion of special pages?
  65          */
  66         var $mAllowSpecialInclusion;
  67
  68         /**
  69          * Use tidy to cleanup output HTML?
  70          */
  71         var $mTidy = false;
  72
  73         /**
  74          * Which lang to call for PLURAL and GRAMMAR
  75          */
  76         var $mInterfaceMessage = false;
  77
  78         /**
  79          * Overrides $mInterfaceMessage with arbitrary language
  80          */
  81         var $mTargetLanguage = null;
  82
  83         /**
  84          * Maximum size of template expansions, in bytes
  85          */
  86         var $mMaxIncludeSize;
  87
  88         /**
  89          * Maximum number of nodes touched by PPFrame::expand()
  90          */
  91         var $mMaxPPNodeCount;
  92
  93         /**
  94          * Maximum number of nodes generated by Preprocessor::preprocessToObj()
  95          */
  96         var $mMaxGeneratedPPNodeCount;
  97
  98         /**
  99          * Maximum recursion depth in PPFrame::expand()
 100          */
 101         var $mMaxPPExpandDepth;
 102
 103         /**
 104          * Maximum recursion depth for templates within templates
 105          */
 106         var $mMaxTemplateDepth;
 107
 108         /**
 109          * Maximum number of calls per parse to expensive parser functions
 110          */
 111         var $mExpensiveParserFunctionLimit;
 112
 113         /**
 114          * Remove HTML comments. ONLY APPLIES TO PREPROCESS OPERATIONS
 115          */
 116         var $mRemoveComments = true;
 117
 118         /**
 119          * Callback for template fetching. Used as first argument to call_user_func().
 120          */
 121         var $mTemplateCallback =
 122                 array( 'Parser', 'statelessFetchTemplate' );
 123
 124         /**
 125          * Enable limit report in an HTML comment on output
 126          */
 127         var $mEnableLimitReport = false;
 128
 129         /**
 130          * Timestamp used for {{CURRENTDAY}} etc.
 131          */
 132         var $mTimestamp;
 133
 134         /**
 135          * Target attribute for external links
 136          */
 137         var $mExternalLinkTarget;
 138
 139         /**
 140          * Clean up signature texts?
 141          *
 142          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures
 143          * 2) Substitute all transclusions
 144          */
 145         var $mCleanSignatures;
 146
 147         /**
 148          * Transform wiki markup when saving the page?
 149          */
 150         var $mPreSaveTransform = true;
 151
 152         /**
 153          * Whether content conversion should be disabled
 154          */
 155         var $mDisableContentConversion;
 156
 157         /**
 158          * Whether title conversion should be disabled
 159          */
 160         var $mDisableTitleConversion;
 161
 162         /**
 163          * Automatically number headings?
 164          */
 165         var $mNumberHeadings;
 166
 167         /**
 168          * User math preference (as integer). Not used (1.19)
 169          */
 170         var $mMath;
 171
 172         /**
 173          * Thumb size preferred by the user.
 174          */
 175         var $mThumbSize;
 176
 177         /**
 178          * Maximum article size of an article to be marked as "stub"
 179          */
 180         private $mStubThreshold;
 181
 182         /**
 183          * Language object of the User language.
 184          */
 185         var $mUserLang;
 186
 187         /**
 188          * @var User
 189          * Stored user object
 190          */
 191         var $mUser;
 192
 193         /**
 194          * Parsing the page for a "preview" operation?
 195          */
 196         var $mIsPreview = false;
 197
 198         /**
 199          * Parsing the page for a "preview" operation on a single section?
 200          */
 201         var $mIsSectionPreview = false;
 202
 203         /**
 204          * Parsing the printable version of the page?
 205          */
 206         var $mIsPrintable = false;
 207
 208         /**
 209          * Extra key that should be present in the caching key.
 210          */
 211         var $mExtraKey = '';
 212
 213         /**
 214          * Function to be called when an option is accessed.
 215          */
 216         protected $onAccessCallback = null;
 217
 218         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
 219         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
 220         function getAllowExternalImagesFrom()       { return $this->mAllowExternalImagesFrom; }
 221         function getEnableImageWhitelist()          { return $this->mEnableImageWhitelist; }
 222         function getEditSection()                   { return $this->mEditSection; }
 223         function getNumberHeadings()                { $this->optionUsed( 'numberheadings' );
 224                                                                                                   return $this->mNumberHeadings; }
 225         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
 226         function getTidy()                          { return $this->mTidy; }
 227         function getInterfaceMessage()              { return $this->mInterfaceMessage; }
 228         function getTargetLanguage()                { return $this->mTargetLanguage; }
 229         function getMaxIncludeSize()                { return $this->mMaxIncludeSize; }
 230         function getMaxPPNodeCount()                { return $this->mMaxPPNodeCount; }
 231         function getMaxGeneratedPPNodeCount()       { return $this->mMaxGeneratedPPNodeCount; }
 232         function getMaxPPExpandDepth()              { return $this->mMaxPPExpandDepth; }
 233         function getMaxTemplateDepth()              { return $this->mMaxTemplateDepth; }
 234         /* @since 1.20 */
 235         function getExpensiveParserFunctionLimit()  { return $this->mExpensiveParserFunctionLimit; }
 236         function getRemoveComments()                { return $this->mRemoveComments; }
 237         function getTemplateCallback()              { return $this->mTemplateCallback; }
 238         function getEnableLimitReport()             { return $this->mEnableLimitReport; }
 239         function getCleanSignatures()               { return $this->mCleanSignatures; }
 240         function getExternalLinkTarget()            { return $this->mExternalLinkTarget; }
 241         function getDisableContentConversion()      { return $this->mDisableContentConversion; }
 242         function getDisableTitleConversion()        { return $this->mDisableTitleConversion; }
 243         /** @deprecated since 1.22 use User::getOption('math') instead */
 244         function getMath()                          { $this->optionUsed( 'math' );
 245                                                                                                   return $this->mMath; }
 246         function getThumbSize()                     { $this->optionUsed( 'thumbsize' );
 247                                                                                                   return $this->mThumbSize; }
 248         function getStubThreshold()                 { $this->optionUsed( 'stubthreshold' );
 249                                                                                                   return $this->mStubThreshold; }
 250
 251         function getIsPreview()                     { return $this->mIsPreview; }
 252         function getIsSectionPreview()              { return $this->mIsSectionPreview; }
 253         function getIsPrintable()                   { $this->optionUsed( 'printable' );
 254                                                                                                   return $this->mIsPrintable; }
 255         function getUser()                          { return $this->mUser; }
 256         function getPreSaveTransform()              { return $this->mPreSaveTransform; }
 257
 258         /**
 259          * @param $title Title
 260          * @return Skin
 261          * @deprecated since 1.18 Use Linker::* instead
 262          */
 263         function getSkin( $title = null ) {
 264                 wfDeprecated( __METHOD__, '1.18' );
 265                 return new DummyLinker;
 266         }
 267
 268         function getDateFormat() {
 269                 $this->optionUsed( 'dateformat' );
 270                 if ( !isset( $this->mDateFormat ) ) {
 271                         $this->mDateFormat = $this->mUser->getDatePreference();
 272                 }
 273                 return $this->mDateFormat;
 274         }
 275
 276         function getTimestamp() {
 277                 if ( !isset( $this->mTimestamp ) ) {
 278                         $this->mTimestamp = wfTimestampNow();
 279                 }
 280                 return $this->mTimestamp;
 281         }
 282
 283         /**
 284          * Get the user language used by the parser for this page.
 285          *
 286          * You shouldn't use this. Really. $parser->getFunctionLang() is all you need.
 287          *
 288          * To avoid side-effects where the page will be rendered based on the language
 289          * of the user who last saved, this function will triger a cache fragmentation.
 290          * Usage of this method is discouraged for that reason.
 291          *
 292          * When saving, this will return the default language instead of the user's.
 293          *
 294          * {{int: }} uses this which used to produce inconsistent link tables (bug 14404).
 295          *
 296          * @return Language object
 297          * @since 1.19
 298          */
 299         function getUserLangObj() {
 300                 $this->optionUsed( 'userlang' );
 301                 return $this->mUserLang;
 302         }
 303
 304         /**
 305          * Same as getUserLangObj() but returns a string instead.
 306          *
 307          * @return String   Language code
 308          * @since 1.17
 309          */
 310         function getUserLang() {
 311                 return $this->getUserLangObj()->getCode();
 312         }
 313
 314         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
 315         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
 316         function setAllowExternalImagesFrom( $x )   { return wfSetVar( $this->mAllowExternalImagesFrom, $x ); }
 317         function setEnableImageWhitelist( $x )      { return wfSetVar( $this->mEnableImageWhitelist, $x ); }
 318         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
 319         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
 320         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
 321         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
 322         function setTidy( $x )                      { return wfSetVar( $this->mTidy, $x ); }
 323
 324         /** @deprecated in 1.19 */
 325         function setSkin( $x )                      { wfDeprecated( __METHOD__, '1.19' ); }
 326         function setInterfaceMessage( $x )          { return wfSetVar( $this->mInterfaceMessage, $x ); }
 327         function setTargetLanguage( $x )            { return wfSetVar( $this->mTargetLanguage, $x, true ); }
 328         function setMaxIncludeSize( $x )            { return wfSetVar( $this->mMaxIncludeSize, $x ); }
 329         function setMaxPPNodeCount( $x )            { return wfSetVar( $this->mMaxPPNodeCount, $x ); }
 330         function setMaxGeneratedPPNodeCount( $x )   { return wfSetVar( $this->mMaxGeneratedPPNodeCount, $x ); }
 331         function setMaxTemplateDepth( $x )          { return wfSetVar( $this->mMaxTemplateDepth, $x ); }
 332         /* @since 1.20 */
 333         function setExpensiveParserFunctionLimit( $x ) { return wfSetVar( $this->mExpensiveParserFunctionLimit, $x ); }
 334         function setRemoveComments( $x )            { return wfSetVar( $this->mRemoveComments, $x ); }
 335         function setTemplateCallback( $x )          { return wfSetVar( $this->mTemplateCallback, $x ); }
 336         function enableLimitReport( $x = true )     { return wfSetVar( $this->mEnableLimitReport, $x ); }
 337         function setTimestamp( $x )                 { return wfSetVar( $this->mTimestamp, $x ); }
 338         function setCleanSignatures( $x )           { return wfSetVar( $this->mCleanSignatures, $x ); }
 339         function setExternalLinkTarget( $x )        { return wfSetVar( $this->mExternalLinkTarget, $x ); }
 340         function disableContentConversion( $x = true ) { return wfSetVar( $this->mDisableContentConversion, $x ); }
 341         function disableTitleConversion( $x = true ) { return wfSetVar( $this->mDisableTitleConversion, $x ); }
 342         /** @deprecated since 1.22 */
 343         function setMath( $x )                      { return wfSetVar( $this->mMath, $x ); }
 344         function setUserLang( $x )                  {
 345                 if ( is_string( $x ) ) {
 346                         $x = Language::factory( $x );
 347                 }
 348                 return wfSetVar( $this->mUserLang, $x );
 349         }
 350         function setThumbSize( $x )                 { return wfSetVar( $this->mThumbSize, $x ); }
 351         function setStubThreshold( $x )             { return wfSetVar( $this->mStubThreshold, $x ); }
 352         function setPreSaveTransform( $x )          { return wfSetVar( $this->mPreSaveTransform, $x ); }
 353
 354         function setIsPreview( $x )                 { return wfSetVar( $this->mIsPreview, $x ); }
 355         function setIsSectionPreview( $x )          { return wfSetVar( $this->mIsSectionPreview, $x ); }
 356         function setIsPrintable( $x )               { return wfSetVar( $this->mIsPrintable, $x ); }
 357
 358         /**
 359          * Extra key that should be present in the parser cache key.
 360          */
 361         function addExtraKey( $key ) {
 362                 $this->mExtraKey .= '!' . $key;
 363         }
 364
 365         /**
 366          * Constructor
 367          * @param $user User object
 368          * @param $lang Language object
 369          */
 370         function __construct( $user = null, $lang = null ) {
 371                 if ( $user === null ) {
 372                         global $wgUser;
 373                         if ( $wgUser === null ) {
 374                                 $user = new User;
 375                         } else {
 376                                 $user = $wgUser;
 377                         }
 378                 }
 379                 if ( $lang === null ) {
 380                         global $wgLang;
 381                         if ( !StubObject::isRealObject( $wgLang ) ) {
 382                                 $wgLang->_unstub();
 383                         }
 384                         $lang = $wgLang;
 385                 }
 386                 $this->initialiseFromUser( $user, $lang );
 387         }
 388
 389         /**
 390          * Get a ParserOptions object from a given user.
 391          * Language will be taken from $wgLang.
 392          *
 393          * @param $user User object
 394          * @return ParserOptions object
 395          */
 396         public static function newFromUser( $user ) {
 397                 return new ParserOptions( $user );
 398         }
 399
 400         /**
 401          * Get a ParserOptions object from a given user and language
 402          *
 403          * @param $user User object
 404          * @param $lang Language object
 405          * @return ParserOptions object
 406          */
 407         public static function newFromUserAndLang( User $user, Language $lang ) {
 408                 return new ParserOptions( $user, $lang );
 409         }
 410
 411         /**
 412          * Get a ParserOptions object from a IContextSource object
 413          *
 414          * @param $context IContextSource object
 415          * @return ParserOptions object
 416          */
 417         public static function newFromContext( IContextSource $context ) {
 418                 return new ParserOptions( $context->getUser(), $context->getLanguage() );
 419         }
 420
 421         /**
 422          * Get user options
 423          *
 424          * @param $user User object
 425          * @param $lang Language object
 426          */
 427         private function initialiseFromUser( $user, $lang ) {
 428                 global $wgInterwikiMagic, $wgAllowExternalImages,
 429                         $wgAllowExternalImagesFrom, $wgEnableImageWhitelist, $wgAllowSpecialInclusion,
 430                         $wgMaxArticleSize, $wgMaxPPNodeCount, $wgMaxTemplateDepth, $wgMaxPPExpandDepth,
 431                         $wgCleanSignatures, $wgExternalLinkTarget, $wgExpensiveParserFunctionLimit,
 432                         $wgMaxGeneratedPPNodeCount, $wgDisableLangConversion, $wgDisableTitleConversion;
 433
 434                 wfProfileIn( __METHOD__ );
 435
 436                 $this->mInterwikiMagic = $wgInterwikiMagic;
 437                 $this->mAllowExternalImages = $wgAllowExternalImages;
 438                 $this->mAllowExternalImagesFrom = $wgAllowExternalImagesFrom;
 439                 $this->mEnableImageWhitelist = $wgEnableImageWhitelist;
 440                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
 441                 $this->mMaxIncludeSize = $wgMaxArticleSize * 1024;
 442                 $this->mMaxPPNodeCount = $wgMaxPPNodeCount;
 443                 $this->mMaxGeneratedPPNodeCount = $wgMaxGeneratedPPNodeCount;
 444                 $this->mMaxPPExpandDepth = $wgMaxPPExpandDepth;
 445                 $this->mMaxTemplateDepth = $wgMaxTemplateDepth;
 446                 $this->mExpensiveParserFunctionLimit = $wgExpensiveParserFunctionLimit;
 447                 $this->mCleanSignatures = $wgCleanSignatures;
 448                 $this->mExternalLinkTarget = $wgExternalLinkTarget;
 449                 $this->mDisableContentConversion = $wgDisableLangConversion;
 450                 $this->mDisableTitleConversion = $wgDisableLangConversion || $wgDisableTitleConversion;
 451
 452                 $this->mUser = $user;
 453                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
 454                 $this->mMath = $user->getOption( 'math' );
 455                 $this->mThumbSize = $user->getOption( 'thumbsize' );
 456                 $this->mStubThreshold = $user->getStubThreshold();
 457                 $this->mUserLang = $lang;
 458
 459                 wfProfileOut( __METHOD__ );
 460         }
 461
 462         /**
 463          * Registers a callback for tracking which ParserOptions which are used.
 464          * This is a private API with the parser.
 465          */
 466         function registerWatcher( $callback ) {
 467                 $this->onAccessCallback = $callback;
 468         }
 469
 470         /**
 471          * Called when an option is accessed.
 472          */
 473         protected function optionUsed( $optionName ) {
 474                 if ( $this->onAccessCallback ) {
 475                         call_user_func( $this->onAccessCallback, $optionName );
 476                 }
 477         }
 478
 479         /**
 480          * Returns the full array of options that would have been used by
 481          * in 1.16.
 482          * Used to get the old parser cache entries when available.
 483          * @return array
 484          */
 485         public static function legacyOptions() {
 486                 return array( 'math', 'stubthreshold', 'numberheadings', 'userlang', 'thumbsize', 'editsection', 'printable' );
 487         }
 488
 489         /**
 490          * Generate a hash string with the values set on these ParserOptions
 491          * for the keys given in the array.
 492          * This will be used as part of the hash key for the parser cache,
 493          * so users sharign the options with vary for the same page share
 494          * the same cached data safely.
 495          *
 496          * Replaces User::getPageRenderingHash()
 497          *
 498          * Extensions which require it should install 'PageRenderingHash' hook,
 499          * which will give them a chance to modify this key based on their own
 500          * settings.
 501          *
 502          * @since 1.17
 503          * @param $forOptions Array
 504          * @param $title Title: used to get the content language of the page (since r97636)
 505          * @return string Page rendering hash
 506          */
 507         public function optionsHash( $forOptions, $title = null ) {
 508                 global $wgRenderHashAppend;
 509
 510                 $confstr = '';
 511
 512                 if ( in_array( 'math', $forOptions ) ) {
 513                         $confstr .= $this->mMath;
 514                 } else {
 515                         $confstr .= '*';
 516                 }
 517
 518                 // Space assigned for the stubthreshold but unused
 519                 // since it disables the parser cache, its value will always
 520                 // be 0 when this function is called by parsercache.
 521                 if ( in_array( 'stubthreshold', $forOptions ) ) {
 522                         $confstr .= '!' . $this->mStubThreshold;
 523                 } else {
 524                         $confstr .= '!*';
 525                 }
 526
 527                 if ( in_array( 'dateformat', $forOptions ) ) {
 528                         $confstr .= '!' . $this->getDateFormat();
 529                 }
 530
 531                 if ( in_array( 'numberheadings', $forOptions ) ) {
 532                         $confstr .= '!' . ( $this->mNumberHeadings ? '1' : '' );
 533                 } else {
 534                         $confstr .= '!*';
 535                 }
 536
 537                 if ( in_array( 'userlang', $forOptions ) ) {
 538                         $confstr .= '!' . $this->mUserLang->getCode();
 539                 } else {
 540                         $confstr .= '!*';
 541                 }
 542
 543                 if ( in_array( 'thumbsize', $forOptions ) ) {
 544                         $confstr .= '!' . $this->mThumbSize;
 545                 } else {
 546                         $confstr .= '!*';
 547                 }
 548
 549                 // add in language specific options, if any
 550                 // @todo FIXME: This is just a way of retrieving the url/user preferred variant
 551                 if ( !is_null( $title ) ) {
 552                         $confstr .= $title->getPageLanguage()->getExtraHashOptions();
 553                 } else {
 554                         global $wgContLang;
 555                         $confstr .= $wgContLang->getExtraHashOptions();
 556                 }
 557
 558                 $confstr .= $wgRenderHashAppend;
 559
 560                 if ( !in_array( 'editsection', $forOptions ) ) {
 561                         $confstr .= '!*';
 562                 } elseif ( !$this->mEditSection ) {
 563                         $confstr .= '!edit=0';
 564                 }
 565
 566                 if ( $this->mIsPrintable && in_array( 'printable', $forOptions ) ) {
 567                         $confstr .= '!printable=1';
 568                 }
 569
 570                 if ( $this->mExtraKey != '' ) {
 571                         $confstr .= $this->mExtraKey;
 572                 }
 573
 574                 // Give a chance for extensions to modify the hash, if they have
 575                 // extra options or other effects on the parser cache.
 576                 wfRunHooks( 'PageRenderingHash', array( &$confstr ) );
 577
 578                 // Make it a valid memcached key fragment
 579                 $confstr = str_replace( ' ', '_', $confstr );
 580
 581                 return $confstr;
 582         }
 583 }