includes/parser/CoreParserFunctions.php

   1 <?php
   2 /**
   3  * Parser functions provided by MediaWiki core
   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  * Various core parser functions, registered in Parser::firstCallInit()
  26  * @ingroup Parser
  27  */
  28 class CoreParserFunctions {
  29         /**
  30          * @param $parser Parser
  31          * @return void
  32          */
  33         static function register( $parser ) {
  34                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
  35
  36                 # Syntax for arguments (see self::setFunctionHook):
  37                 #  "name for lookup in localized magic words array",
  38                 #  function callback,
  39                 #  optional SFH_NO_HASH to omit the hash from calls (e.g. {{int:...}}
  40                 #    instead of {{#int:...}})
  41
  42                 $parser->setFunctionHook( 'int',              array( __CLASS__, 'intFunction'      ), SFH_NO_HASH );
  43                 $parser->setFunctionHook( 'ns',               array( __CLASS__, 'ns'               ), SFH_NO_HASH );
  44                 $parser->setFunctionHook( 'nse',              array( __CLASS__, 'nse'              ), SFH_NO_HASH );
  45                 $parser->setFunctionHook( 'urlencode',        array( __CLASS__, 'urlencode'        ), SFH_NO_HASH );
  46                 $parser->setFunctionHook( 'lcfirst',          array( __CLASS__, 'lcfirst'          ), SFH_NO_HASH );
  47                 $parser->setFunctionHook( 'ucfirst',          array( __CLASS__, 'ucfirst'          ), SFH_NO_HASH );
  48                 $parser->setFunctionHook( 'lc',               array( __CLASS__, 'lc'               ), SFH_NO_HASH );
  49                 $parser->setFunctionHook( 'uc',               array( __CLASS__, 'uc'               ), SFH_NO_HASH );
  50                 $parser->setFunctionHook( 'localurl',         array( __CLASS__, 'localurl'         ), SFH_NO_HASH );
  51                 $parser->setFunctionHook( 'localurle',        array( __CLASS__, 'localurle'        ), SFH_NO_HASH );
  52                 $parser->setFunctionHook( 'fullurl',          array( __CLASS__, 'fullurl'          ), SFH_NO_HASH );
  53                 $parser->setFunctionHook( 'fullurle',         array( __CLASS__, 'fullurle'         ), SFH_NO_HASH );
  54                 $parser->setFunctionHook( 'canonicalurl',     array( __CLASS__, 'canonicalurl'     ), SFH_NO_HASH );
  55                 $parser->setFunctionHook( 'canonicalurle',    array( __CLASS__, 'canonicalurle'    ), SFH_NO_HASH );
  56                 $parser->setFunctionHook( 'formatnum',        array( __CLASS__, 'formatnum'        ), SFH_NO_HASH );
  57                 $parser->setFunctionHook( 'grammar',          array( __CLASS__, 'grammar'          ), SFH_NO_HASH );
  58                 $parser->setFunctionHook( 'gender',           array( __CLASS__, 'gender'           ), SFH_NO_HASH );
  59                 $parser->setFunctionHook( 'plural',           array( __CLASS__, 'plural'           ), SFH_NO_HASH );
  60                 $parser->setFunctionHook( 'numberofpages',    array( __CLASS__, 'numberofpages'    ), SFH_NO_HASH );
  61                 $parser->setFunctionHook( 'numberofusers',    array( __CLASS__, 'numberofusers'    ), SFH_NO_HASH );
  62                 $parser->setFunctionHook( 'numberofactiveusers', array( __CLASS__, 'numberofactiveusers' ), SFH_NO_HASH );
  63                 $parser->setFunctionHook( 'numberofarticles', array( __CLASS__, 'numberofarticles' ), SFH_NO_HASH );
  64                 $parser->setFunctionHook( 'numberoffiles',    array( __CLASS__, 'numberoffiles'    ), SFH_NO_HASH );
  65                 $parser->setFunctionHook( 'numberofadmins',   array( __CLASS__, 'numberofadmins'   ), SFH_NO_HASH );
  66                 $parser->setFunctionHook( 'numberingroup',    array( __CLASS__, 'numberingroup'    ), SFH_NO_HASH );
  67                 $parser->setFunctionHook( 'numberofedits',    array( __CLASS__, 'numberofedits'    ), SFH_NO_HASH );
  68                 $parser->setFunctionHook( 'numberofviews',    array( __CLASS__, 'numberofviews'    ), SFH_NO_HASH );
  69                 $parser->setFunctionHook( 'language',         array( __CLASS__, 'language'         ), SFH_NO_HASH );
  70                 $parser->setFunctionHook( 'padleft',          array( __CLASS__, 'padleft'          ), SFH_NO_HASH );
  71                 $parser->setFunctionHook( 'padright',         array( __CLASS__, 'padright'         ), SFH_NO_HASH );
  72                 $parser->setFunctionHook( 'anchorencode',     array( __CLASS__, 'anchorencode'     ), SFH_NO_HASH );
  73                 $parser->setFunctionHook( 'special',          array( __CLASS__, 'special'          ) );
  74                 $parser->setFunctionHook( 'speciale',         array( __CLASS__, 'speciale'         ) );
  75                 $parser->setFunctionHook( 'defaultsort',      array( __CLASS__, 'defaultsort'      ), SFH_NO_HASH );
  76                 $parser->setFunctionHook( 'filepath',         array( __CLASS__, 'filepath'         ), SFH_NO_HASH );
  77                 $parser->setFunctionHook( 'pagesincategory',  array( __CLASS__, 'pagesincategory'  ), SFH_NO_HASH );
  78                 $parser->setFunctionHook( 'pagesize',         array( __CLASS__, 'pagesize'         ), SFH_NO_HASH );
  79                 $parser->setFunctionHook( 'protectionlevel',  array( __CLASS__, 'protectionlevel'  ), SFH_NO_HASH );
  80                 $parser->setFunctionHook( 'namespace',        array( __CLASS__, 'mwnamespace'      ), SFH_NO_HASH );
  81                 $parser->setFunctionHook( 'namespacee',       array( __CLASS__, 'namespacee'       ), SFH_NO_HASH );
  82                 $parser->setFunctionHook( 'namespacenumber',  array( __CLASS__, 'namespacenumber'  ), SFH_NO_HASH );
  83                 $parser->setFunctionHook( 'talkspace',        array( __CLASS__, 'talkspace'        ), SFH_NO_HASH );
  84                 $parser->setFunctionHook( 'talkspacee',       array( __CLASS__, 'talkspacee'       ), SFH_NO_HASH );
  85                 $parser->setFunctionHook( 'subjectspace',     array( __CLASS__, 'subjectspace'     ), SFH_NO_HASH );
  86                 $parser->setFunctionHook( 'subjectspacee',    array( __CLASS__, 'subjectspacee'    ), SFH_NO_HASH );
  87                 $parser->setFunctionHook( 'pagename',         array( __CLASS__, 'pagename'         ), SFH_NO_HASH );
  88                 $parser->setFunctionHook( 'pagenamee',        array( __CLASS__, 'pagenamee'        ), SFH_NO_HASH );
  89                 $parser->setFunctionHook( 'fullpagename',     array( __CLASS__, 'fullpagename'     ), SFH_NO_HASH );
  90                 $parser->setFunctionHook( 'fullpagenamee',    array( __CLASS__, 'fullpagenamee'    ), SFH_NO_HASH );
  91                 $parser->setFunctionHook( 'basepagename',     array( __CLASS__, 'basepagename'     ), SFH_NO_HASH );
  92                 $parser->setFunctionHook( 'basepagenamee',    array( __CLASS__, 'basepagenamee'    ), SFH_NO_HASH );
  93                 $parser->setFunctionHook( 'subpagename',      array( __CLASS__, 'subpagename'      ), SFH_NO_HASH );
  94                 $parser->setFunctionHook( 'subpagenamee',     array( __CLASS__, 'subpagenamee'     ), SFH_NO_HASH );
  95                 $parser->setFunctionHook( 'talkpagename',     array( __CLASS__, 'talkpagename'     ), SFH_NO_HASH );
  96                 $parser->setFunctionHook( 'talkpagenamee',    array( __CLASS__, 'talkpagenamee'    ), SFH_NO_HASH );
  97                 $parser->setFunctionHook( 'subjectpagename',  array( __CLASS__, 'subjectpagename'  ), SFH_NO_HASH );
  98                 $parser->setFunctionHook( 'subjectpagenamee', array( __CLASS__, 'subjectpagenamee' ), SFH_NO_HASH );
  99                 $parser->setFunctionHook( 'tag',              array( __CLASS__, 'tagObj'           ), SFH_OBJECT_ARGS );
 100                 $parser->setFunctionHook( 'formatdate',       array( __CLASS__, 'formatDate'       ) );
 101
 102                 if ( $wgAllowDisplayTitle ) {
 103                         $parser->setFunctionHook( 'displaytitle', array( __CLASS__, 'displaytitle' ), SFH_NO_HASH );
 104                 }
 105                 if ( $wgAllowSlowParserFunctions ) {
 106                         $parser->setFunctionHook( 'pagesinnamespace', array( __CLASS__, 'pagesinnamespace' ), SFH_NO_HASH );
 107                 }
 108         }
 109
 110         /**
 111          * @param $parser Parser
 112          * @param string $part1
 113          * @return array
 114          */
 115         static function intFunction( $parser, $part1 = '' /*, ... */ ) {
 116                 if ( strval( $part1 ) !== '' ) {
 117                         $args = array_slice( func_get_args(), 2 );
 118                         $message = wfMessage( $part1, $args )->inLanguage( $parser->getOptions()->getUserLangObj() )->plain();
 119                         return array( $message, 'noparse' => false );
 120                 } else {
 121                         return array( 'found' => false );
 122                 }
 123         }
 124
 125         /**
 126          * @param $parser Parser
 127          * @param  $date
 128          * @param null $defaultPref
 129          * @return mixed|string
 130          */
 131         static function formatDate( $parser, $date, $defaultPref = null ) {
 132                 $df = DateFormatter::getInstance();
 133
 134                 $date = trim( $date );
 135
 136                 $pref = $parser->getOptions()->getDateFormat();
 137
 138                 // Specify a different default date format other than the the normal default
 139                 // iff the user has 'default' for their setting
 140                 if ( $pref == 'default' && $defaultPref )
 141                         $pref = $defaultPref;
 142
 143                 $date = $df->reformat( $pref, $date, array( 'match-whole' ) );
 144                 return $date;
 145         }
 146
 147         static function ns( $parser, $part1 = '' ) {
 148                 global $wgContLang;
 149                 if ( intval( $part1 ) || $part1 == "0" ) {
 150                         $index = intval( $part1 );
 151                 } else {
 152                         $index = $wgContLang->getNsIndex( str_replace( ' ', '_', $part1 ) );
 153                 }
 154                 if ( $index !== false ) {
 155                         return $wgContLang->getFormattedNsText( $index );
 156                 } else {
 157                         return array( 'found' => false );
 158                 }
 159         }
 160
 161         static function nse( $parser, $part1 = '' ) {
 162                 $ret = self::ns( $parser, $part1 );
 163                 if ( is_string( $ret ) ) {
 164                         $ret = wfUrlencode( str_replace( ' ', '_', $ret ) );
 165                 }
 166                 return $ret;
 167         }
 168
 169         /**
 170          * urlencodes a string according to one of three patterns: (bug 22474)
 171          *
 172          * By default (for HTTP "query" strings), spaces are encoded as '+'.
 173          * Or to encode a value for the HTTP "path", spaces are encoded as '%20'.
 174          * For links to "wiki"s, or similar software, spaces are encoded as '_',
 175          *
 176          * @param $parser Parser object
 177          * @param $s String: The text to encode.
 178          * @param $arg String (optional): The type of encoding.
 179          * @return string
 180          */
 181         static function urlencode( $parser, $s = '', $arg = null ) {
 182                 static $magicWords = null;
 183                 if ( is_null( $magicWords ) ) {
 184                         $magicWords = new MagicWordArray( array( 'url_path', 'url_query', 'url_wiki' ) );
 185                 }
 186                 switch( $magicWords->matchStartToEnd( $arg ) ) {
 187
 188                         // Encode as though it's a wiki page, '_' for ' '.
 189                         case 'url_wiki':
 190                                 $func = 'wfUrlencode';
 191                                 $s = str_replace( ' ', '_', $s );
 192                                 break;
 193
 194                         // Encode for an HTTP Path, '%20' for ' '.
 195                         case 'url_path':
 196                                 $func = 'rawurlencode';
 197                                 break;
 198
 199                         // Encode for HTTP query, '+' for ' '.
 200                         case 'url_query':
 201                         default:
 202                                 $func = 'urlencode';
 203                 }
 204                 return $parser->markerSkipCallback( $s, $func );
 205         }
 206
 207         static function lcfirst( $parser, $s = '' ) {
 208                 global $wgContLang;
 209                 return $wgContLang->lcfirst( $s );
 210         }
 211
 212         static function ucfirst( $parser, $s = '' ) {
 213                 global $wgContLang;
 214                 return $wgContLang->ucfirst( $s );
 215         }
 216
 217         /**
 218          * @param $parser Parser
 219          * @param string $s
 220          * @return
 221          */
 222         static function lc( $parser, $s = '' ) {
 223                 global $wgContLang;
 224                 return $parser->markerSkipCallback( $s, array( $wgContLang, 'lc' ) );
 225         }
 226
 227         /**
 228          * @param $parser Parser
 229          * @param string $s
 230          * @return
 231          */
 232         static function uc( $parser, $s = '' ) {
 233                 global $wgContLang;
 234                 return $parser->markerSkipCallback( $s, array( $wgContLang, 'uc' ) );
 235         }
 236
 237         static function localurl( $parser, $s = '', $arg = null ) { return self::urlFunction( 'getLocalURL', $s, $arg ); }
 238         static function localurle( $parser, $s = '', $arg = null ) { return self::urlFunction( 'escapeLocalURL', $s, $arg ); }
 239         static function fullurl( $parser, $s = '', $arg = null ) { return self::urlFunction( 'getFullURL', $s, $arg ); }
 240         static function fullurle( $parser, $s = '', $arg = null ) { return self::urlFunction( 'escapeFullURL', $s, $arg ); }
 241         static function canonicalurl( $parser, $s = '', $arg = null ) { return self::urlFunction( 'getCanonicalURL', $s, $arg ); }
 242         static function canonicalurle( $parser, $s = '', $arg = null ) { return self::urlFunction( 'escapeCanonicalURL', $s, $arg ); }
 243
 244         static function urlFunction( $func, $s = '', $arg = null ) {
 245                 $title = Title::newFromText( $s );
 246                 # Due to order of execution of a lot of bits, the values might be encoded
 247                 # before arriving here; if that's true, then the title can't be created
 248                 # and the variable will fail. If we can't get a decent title from the first
 249                 # attempt, url-decode and try for a second.
 250                 if( is_null( $title ) )
 251                         $title = Title::newFromURL( urldecode( $s ) );
 252                 if( !is_null( $title ) ) {
 253                         # Convert NS_MEDIA -> NS_FILE
 254                         if( $title->getNamespace() == NS_MEDIA ) {
 255                                 $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 256                         }
 257                         if( !is_null( $arg ) ) {
 258                                 $text = $title->$func( $arg );
 259                         } else {
 260                                 $text = $title->$func();
 261                         }
 262                         return $text;
 263                 } else {
 264                         return array( 'found' => false );
 265                 }
 266         }
 267
 268         /**
 269          * @param $parser Parser
 270          * @param string $num
 271          * @param null $raw
 272          * @return
 273          */
 274         static function formatnum( $parser, $num = '', $raw = null) {
 275                 if ( self::isRaw( $raw ) ) {
 276                         $func = array( $parser->getFunctionLang(), 'parseFormattedNumber' );
 277                 } else {
 278                         $func = array( $parser->getFunctionLang(), 'formatNum' );
 279                 }
 280                 return $parser->markerSkipCallback( $num, $func );
 281         }
 282
 283         /**
 284          * @param $parser Parser
 285          * @param string $case
 286          * @param string $word
 287          * @return
 288          */
 289         static function grammar( $parser, $case = '', $word = '' ) {
 290                 $word = $parser->killMarkers( $word );
 291                 return $parser->getFunctionLang()->convertGrammar( $word, $case );
 292         }
 293
 294         /**
 295          * @param $parser Parser
 296          * @param $username string
 297          * @return
 298          */
 299         static function gender( $parser, $username ) {
 300                 wfProfileIn( __METHOD__ );
 301                 $forms = array_slice( func_get_args(), 2 );
 302
 303                 // Some shortcuts to avoid loading user data unnecessarily
 304                 if ( count( $forms ) === 0 ) {
 305                         wfProfileOut( __METHOD__ );
 306                         return '';
 307                 } elseif ( count( $forms ) === 1 ) {
 308                         wfProfileOut( __METHOD__ );
 309                         return $forms[0];
 310                 }
 311
 312                 $username = trim( $username );
 313
 314                 // default
 315                 $gender = User::getDefaultOption( 'gender' );
 316
 317                 // allow prefix.
 318                 $title = Title::newFromText( $username );
 319
 320                 if ( $title && $title->getNamespace() == NS_USER ) {
 321                         $username = $title->getText();
 322                 }
 323
 324                 // check parameter, or use the ParserOptions if in interface message
 325                 $user = User::newFromName( $username );
 326                 if ( $user ) {
 327                         $gender = GenderCache::singleton()->getGenderOf( $user, __METHOD__ );
 328                 } elseif ( $username === '' && $parser->getOptions()->getInterfaceMessage() ) {
 329                         $gender = GenderCache::singleton()->getGenderOf( $parser->getOptions()->getUser(), __METHOD__ );
 330                 }
 331                 $ret = $parser->getFunctionLang()->gender( $gender, $forms );
 332                 wfProfileOut( __METHOD__ );
 333                 return $ret;
 334         }
 335
 336         /**
 337          * @param $parser Parser
 338          * @param string $text
 339          * @return
 340          */
 341         static function plural( $parser, $text = '' ) {
 342                 $forms = array_slice( func_get_args(), 2 );
 343                 $text = $parser->getFunctionLang()->parseFormattedNumber( $text );
 344                 return $parser->getFunctionLang()->convertPlural( $text, $forms );
 345         }
 346
 347         /**
 348          * Override the title of the page when viewed, provided we've been given a
 349          * title which will normalise to the canonical title
 350          *
 351          * @param $parser Parser: parent parser
 352          * @param $text String: desired title text
 353          * @return String
 354          */
 355         static function displaytitle( $parser, $text = '' ) {
 356                 global $wgRestrictDisplayTitle;
 357
 358                 #parse a limited subset of wiki markup (just the single quote items)
 359                 $text = $parser->doQuotes( $text );
 360
 361                 #remove stripped text (e.g. the UNIQ-QINU stuff) that was generated by tag extensions/whatever
 362                 $text = preg_replace( '/' . preg_quote( $parser->uniqPrefix(), '/' ) . '.*?'
 363                         . preg_quote( Parser::MARKER_SUFFIX, '/' ) . '/', '', $text );
 364
 365                 #list of disallowed tags for DISPLAYTITLE
 366                 #these will be escaped even though they are allowed in normal wiki text
 367                 $bad = array( 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'div', 'blockquote', 'ol', 'ul', 'li', 'hr',
 368                         'table', 'tr', 'th', 'td', 'dl', 'dd', 'caption', 'p', 'ruby', 'rb', 'rt', 'rp', 'br' );
 369
 370                 #only requested titles that normalize to the actual title are allowed through
 371                 #if $wgRestrictDisplayTitle is true (it is by default)
 372                 #mimic the escaping process that occurs in OutputPage::setPageTitle
 373                 $text = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $text, null, array(), array(), $bad ) );
 374                 $title = Title::newFromText( Sanitizer::stripAllTags( $text ) );
 375
 376                 if( !$wgRestrictDisplayTitle ) {
 377                         $parser->mOutput->setDisplayTitle( $text );
 378                 } else {
 379                         if ( $title instanceof Title && $title->getFragment() == '' && $title->equals( $parser->mTitle ) ) {
 380                                 $parser->mOutput->setDisplayTitle( $text );
 381                         }
 382                 }
 383
 384                 return '';
 385         }
 386
 387         static function isRaw( $param ) {
 388                 static $mwRaw;
 389                 if ( !$mwRaw ) {
 390                         $mwRaw =& MagicWord::get( 'rawsuffix' );
 391                 }
 392                 if ( is_null( $param ) ) {
 393                         return false;
 394                 } else {
 395                         return $mwRaw->match( $param );
 396                 }
 397         }
 398
 399         static function formatRaw( $num, $raw ) {
 400                 if( self::isRaw( $raw ) ) {
 401                         return $num;
 402                 } else {
 403                         global $wgContLang;
 404                         return $wgContLang->formatNum( $num );
 405                 }
 406         }
 407         static function numberofpages( $parser, $raw = null ) {
 408                 return self::formatRaw( SiteStats::pages(), $raw );
 409         }
 410         static function numberofusers( $parser, $raw = null ) {
 411                 return self::formatRaw( SiteStats::users(), $raw );
 412         }
 413         static function numberofactiveusers( $parser, $raw = null ) {
 414                 return self::formatRaw( SiteStats::activeUsers(), $raw );
 415         }
 416         static function numberofarticles( $parser, $raw = null ) {
 417                 return self::formatRaw( SiteStats::articles(), $raw );
 418         }
 419         static function numberoffiles( $parser, $raw = null ) {
 420                 return self::formatRaw( SiteStats::images(), $raw );
 421         }
 422         static function numberofadmins( $parser, $raw = null ) {
 423                 return self::formatRaw( SiteStats::numberingroup('sysop'), $raw );
 424         }
 425         static function numberofedits( $parser, $raw = null ) {
 426                 return self::formatRaw( SiteStats::edits(), $raw );
 427         }
 428         static function numberofviews( $parser, $raw = null ) {
 429                 return self::formatRaw( SiteStats::views(), $raw );
 430         }
 431         static function pagesinnamespace( $parser, $namespace = 0, $raw = null ) {
 432                 return self::formatRaw( SiteStats::pagesInNs( intval( $namespace ) ), $raw );
 433         }
 434         static function numberingroup( $parser, $name = '', $raw = null) {
 435                 return self::formatRaw( SiteStats::numberingroup( strtolower( $name ) ), $raw );
 436         }
 437
 438
 439         /**
 440          * Given a title, return the namespace name that would be given by the
 441          * corresponding magic word
 442          * Note: function name changed to "mwnamespace" rather than "namespace"
 443          * to not break PHP 5.3
 444          * @return mixed|string
 445          */
 446         static function mwnamespace( $parser, $title = null ) {
 447                 $t = Title::newFromText( $title );
 448                 if ( is_null( $t ) )
 449                         return '';
 450                 return str_replace( '_', ' ', $t->getNsText() );
 451         }
 452         static function namespacee( $parser, $title = null ) {
 453                 $t = Title::newFromText( $title );
 454                 if ( is_null( $t ) )
 455                         return '';
 456                 return wfUrlencode( $t->getNsText() );
 457         }
 458         static function namespacenumber( $parser, $title = null ) {
 459                 $t = Title::newFromText( $title );
 460                 if ( is_null( $t ) )
 461                         return '';
 462                 return $t->getNamespace();
 463         }
 464         static function talkspace( $parser, $title = null ) {
 465                 $t = Title::newFromText( $title );
 466                 if ( is_null( $t ) || !$t->canTalk() )
 467                         return '';
 468                 return str_replace( '_', ' ', $t->getTalkNsText() );
 469         }
 470         static function talkspacee( $parser, $title = null ) {
 471                 $t = Title::newFromText( $title );
 472                 if ( is_null( $t ) || !$t->canTalk() )
 473                         return '';
 474                 return wfUrlencode( $t->getTalkNsText() );
 475         }
 476         static function subjectspace( $parser, $title = null ) {
 477                 $t = Title::newFromText( $title );
 478                 if ( is_null( $t ) )
 479                         return '';
 480                 return str_replace( '_', ' ', $t->getSubjectNsText() );
 481         }
 482         static function subjectspacee( $parser, $title = null ) {
 483                 $t = Title::newFromText( $title );
 484                 if ( is_null( $t ) )
 485                         return '';
 486                 return wfUrlencode( $t->getSubjectNsText() );
 487         }
 488
 489         /**
 490          * Functions to get and normalize pagenames, corresponding to the magic words
 491          * of the same names
 492          * @return String
 493          */
 494         static function pagename( $parser, $title = null ) {
 495                 $t = Title::newFromText( $title );
 496                 if ( is_null( $t ) )
 497                         return '';
 498                 return wfEscapeWikiText( $t->getText() );
 499         }
 500         static function pagenamee( $parser, $title = null ) {
 501                 $t = Title::newFromText( $title );
 502                 if ( is_null( $t ) )
 503                         return '';
 504                 return wfEscapeWikiText( $t->getPartialURL() );
 505         }
 506         static function fullpagename( $parser, $title = null ) {
 507                 $t = Title::newFromText( $title );
 508                 if ( is_null( $t ) || !$t->canTalk() )
 509                         return '';
 510                 return wfEscapeWikiText( $t->getPrefixedText() );
 511         }
 512         static function fullpagenamee( $parser, $title = null ) {
 513                 $t = Title::newFromText( $title );
 514                 if ( is_null( $t ) || !$t->canTalk() )
 515                         return '';
 516                 return wfEscapeWikiText( $t->getPrefixedURL() );
 517         }
 518         static function subpagename( $parser, $title = null ) {
 519                 $t = Title::newFromText( $title );
 520                 if ( is_null( $t ) )
 521                         return '';
 522                 return wfEscapeWikiText( $t->getSubpageText() );
 523         }
 524         static function subpagenamee( $parser, $title = null ) {
 525                 $t = Title::newFromText( $title );
 526                 if ( is_null( $t ) )
 527                         return '';
 528                 return wfEscapeWikiText( $t->getSubpageUrlForm() );
 529         }
 530         static function basepagename( $parser, $title = null ) {
 531                 $t = Title::newFromText( $title );
 532                 if ( is_null( $t ) )
 533                         return '';
 534                 return wfEscapeWikiText( $t->getBaseText() );
 535         }
 536         static function basepagenamee( $parser, $title = null ) {
 537                 $t = Title::newFromText( $title );
 538                 if ( is_null( $t ) )
 539                         return '';
 540                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getBaseText() ) ) );
 541         }
 542         static function talkpagename( $parser, $title = null ) {
 543                 $t = Title::newFromText( $title );
 544                 if ( is_null( $t ) || !$t->canTalk() )
 545                         return '';
 546                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedText() );
 547         }
 548         static function talkpagenamee( $parser, $title = null ) {
 549                 $t = Title::newFromText( $title );
 550                 if ( is_null( $t ) || !$t->canTalk() )
 551                         return '';
 552                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedUrl() );
 553         }
 554         static function subjectpagename( $parser, $title = null ) {
 555                 $t = Title::newFromText( $title );
 556                 if ( is_null( $t ) )
 557                         return '';
 558                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedText() );
 559         }
 560         static function subjectpagenamee( $parser, $title = null ) {
 561                 $t = Title::newFromText( $title );
 562                 if ( is_null( $t ) )
 563                         return '';
 564                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedUrl() );
 565         }
 566
 567         /**
 568          * Return the number of pages in the given category, or 0 if it's nonexis-
 569          * tent.  This is an expensive parser function and can't be called too many
 570          * times per page.
 571          * @return string
 572          */
 573         static function pagesincategory( $parser, $name = '', $raw = null ) {
 574                 static $cache = array();
 575                 $category = Category::newFromName( $name );
 576
 577                 if( !is_object( $category ) ) {
 578                         $cache[$name] = 0;
 579                         return self::formatRaw( 0, $raw );
 580                 }
 581
 582                 # Normalize name for cache
 583                 $name = $category->getName();
 584
 585                 $count = 0;
 586                 if( isset( $cache[$name] ) ) {
 587                         $count = $cache[$name];
 588                 } elseif( $parser->incrementExpensiveFunctionCount() ) {
 589                         $count = $cache[$name] = (int)$category->getPageCount();
 590                 }
 591                 return self::formatRaw( $count, $raw );
 592         }
 593
 594         /**
 595          * Return the size of the given page, or 0 if it's nonexistent.  This is an
 596          * expensive parser function and can't be called too many times per page.
 597          *
 598          * @todo FIXME: This doesn't work correctly on preview for getting the size
 599          *   of the current page.
 600          * @todo FIXME: Title::getLength() documentation claims that it adds things
 601          *   to the link cache, so the local cache here should be unnecessary, but
 602          *   in fact calling getLength() repeatedly for the same $page does seem to
 603          *   run one query for each call?
 604          * @todo Document parameters
 605          *
 606          * @param $parser Parser
 607          * @param $page String TODO DOCUMENT (Default: empty string)
 608          * @param $raw TODO DOCUMENT (Default: null)
 609          * @return string
 610          */
 611         static function pagesize( $parser, $page = '', $raw = null ) {
 612                 static $cache = array();
 613                 $title = Title::newFromText( $page );
 614
 615                 if( !is_object( $title ) ) {
 616                         $cache[$page] = 0;
 617                         return self::formatRaw( 0, $raw );
 618                 }
 619
 620                 # Normalize name for cache
 621                 $page = $title->getPrefixedText();
 622
 623                 $length = 0;
 624                 if( isset( $cache[$page] ) ) {
 625                         $length = $cache[$page];
 626                 } elseif( $parser->incrementExpensiveFunctionCount() ) {
 627                         $rev = Revision::newFromTitle( $title );
 628                         $id = $rev ? $rev->getPage() : 0;
 629                         $length = $cache[$page] = $rev ? $rev->getSize() : 0;
 630
 631                         // Register dependency in templatelinks
 632                         $parser->mOutput->addTemplate( $title, $id, $rev ? $rev->getId() : 0 );
 633                 }
 634                 return self::formatRaw( $length, $raw );
 635         }
 636
 637         /**
 638         * Returns the requested protection level for the current page
 639          * @return string
 640          */
 641         static function protectionlevel( $parser, $type = '' ) {
 642                 $restrictions = $parser->mTitle->getRestrictions( strtolower( $type ) );
 643                 # Title::getRestrictions returns an array, its possible it may have
 644                 # multiple values in the future
 645                 return implode( $restrictions, ',' );
 646         }
 647
 648         /**
 649          * Gives language names.
 650          * @param $parser Parser
 651          * @param $code String  Language code (of which to get name)
 652          * @param $inLanguage String  Language code (in which to get name)
 653          * @return String
 654          */
 655         static function language( $parser, $code = '', $inLanguage = '' ) {
 656                 $code = strtolower( $code );
 657                 $inLanguage = strtolower( $inLanguage );
 658                 $lang = Language::fetchLanguageName( $code, $inLanguage );
 659                 return $lang !== '' ? $lang : wfBCP47( $code );
 660         }
 661
 662         /**
 663          * Unicode-safe str_pad with the restriction that $length is forced to be <= 500
 664          * @return string
 665          */
 666         static function pad( $parser, $string, $length, $padding = '0', $direction = STR_PAD_RIGHT ) {
 667                 $padding = $parser->killMarkers( $padding );
 668                 $lengthOfPadding = mb_strlen( $padding );
 669                 if ( $lengthOfPadding == 0 ) return $string;
 670
 671                 # The remaining length to add counts down to 0 as padding is added
 672                 $length = min( $length, 500 ) - mb_strlen( $string );
 673                 # $finalPadding is just $padding repeated enough times so that
 674                 # mb_strlen( $string ) + mb_strlen( $finalPadding ) == $length
 675                 $finalPadding = '';
 676                 while ( $length > 0 ) {
 677                         # If $length < $lengthofPadding, truncate $padding so we get the
 678                         # exact length desired.
 679                         $finalPadding .= mb_substr( $padding, 0, $length );
 680                         $length -= $lengthOfPadding;
 681                 }
 682
 683                 if ( $direction == STR_PAD_LEFT ) {
 684                         return $finalPadding . $string;
 685                 } else {
 686                         return $string . $finalPadding;
 687                 }
 688         }
 689
 690         static function padleft( $parser, $string = '', $length = 0, $padding = '0' ) {
 691                 return self::pad( $parser, $string, $length, $padding, STR_PAD_LEFT );
 692         }
 693
 694         static function padright( $parser, $string = '', $length = 0, $padding = '0' ) {
 695                 return self::pad( $parser, $string, $length, $padding );
 696         }
 697
 698         /**
 699          * @param $parser Parser
 700          * @param  $text
 701          * @return string
 702          */
 703         static function anchorencode( $parser, $text ) {
 704                 $text = $parser->killMarkers( $text );
 705                 return substr( $parser->guessSectionNameFromWikiText( $text ), 1);
 706         }
 707
 708         static function special( $parser, $text ) {
 709                 list( $page, $subpage ) = SpecialPageFactory::resolveAlias( $text );
 710                 if ( $page ) {
 711                         $title = SpecialPage::getTitleFor( $page, $subpage );
 712                         return $title->getPrefixedText();
 713                 } else {
 714                         return wfMsgForContent( 'nosuchspecialpage' );
 715                 }
 716         }
 717
 718         static function speciale( $parser, $text ) {
 719                 return wfUrlencode( str_replace( ' ', '_', self::special( $parser, $text ) ) );
 720         }
 721
 722         /**
 723          * @param $parser Parser
 724          * @param $text String The sortkey to use
 725          * @param $uarg String Either "noreplace" or "noerror" (in en)
 726          *   both suppress errors, and noreplace does nothing if
 727          *   a default sortkey already exists.
 728          * @return string
 729          */
 730         public static function defaultsort( $parser, $text, $uarg = '' ) {
 731                 static $magicWords = null;
 732                 if ( is_null( $magicWords ) ) {
 733                         $magicWords = new MagicWordArray( array( 'defaultsort_noerror', 'defaultsort_noreplace' ) );
 734                 }
 735                 $arg = $magicWords->matchStartToEnd( $uarg );
 736
 737                 $text = trim( $text );
 738                 if( strlen( $text ) == 0 )
 739                         return '';
 740                 $old = $parser->getCustomDefaultSort();
 741                 if ( $old === false || $arg !== 'defaultsort_noreplace' ) {
 742                         $parser->setDefaultSort( $text );
 743                 }
 744
 745                 if( $old === false || $old == $text || $arg ) {
 746                         return '';
 747                 } else {
 748                         return( '<span class="error">' .
 749                                 wfMsgForContent( 'duplicate-defaultsort',
 750                                                  htmlspecialchars( $old ),
 751                                                  htmlspecialchars( $text ) ) .
 752                                 '</span>' );
 753                 }
 754         }
 755
 756         // Usage {{filepath|300}}, {{filepath|nowiki}}, {{filepath|nowiki|300}} or {{filepath|300|nowiki}}
 757         public static function filepath( $parser, $name='', $argA='', $argB='' ) {
 758                 $file = wfFindFile( $name );
 759                 $size = '';
 760                 $argA_int = intval( $argA );
 761                 $argB_int = intval( $argB );
 762
 763                 if ( $argB_int > 0 ) {
 764                         // {{filepath: | option | size }}
 765                         $size = $argB_int;
 766                         $option = $argA;
 767
 768                 } elseif ( $argA_int > 0 ) {
 769                         // {{filepath: | size [|option] }}
 770                         $size = $argA_int;
 771                         $option = $argB;
 772
 773                 } else {
 774                         // {{filepath: [|option] }}
 775                         $option = $argA;
 776                 }
 777
 778                 if ( $file ) {
 779                         $url = $file->getFullUrl();
 780
 781                         // If a size is requested...
 782                         if ( is_integer( $size ) ) {
 783                                 $mto = $file->transform( array( 'width' => $size ) );
 784                                 // ... and we can
 785                                 if ( $mto && !$mto->isError() ) {
 786                                         // ... change the URL to point to a thumbnail.
 787                                         $url = wfExpandUrl( $mto->getUrl(), PROTO_RELATIVE );
 788                                 }
 789                         }
 790                         if ( $option == 'nowiki' ) {
 791                                 return array( $url, 'nowiki' => true );
 792                         }
 793                         return $url;
 794                 } else {
 795                         return '';
 796                 }
 797         }
 798
 799         /**
 800          * Parser function to extension tag adaptor
 801          * @return string
 802          */
 803         public static function tagObj( $parser, $frame, $args ) {
 804                 if ( !count( $args ) ) {
 805                         return '';
 806                 }
 807                 $tagName = strtolower( trim( $frame->expand( array_shift( $args ) ) ) );
 808
 809                 if ( count( $args ) ) {
 810                         $inner = $frame->expand( array_shift( $args ) );
 811                 } else {
 812                         $inner = null;
 813                 }
 814
 815                 $stripList = $parser->getStripList();
 816                 if ( !in_array( $tagName, $stripList ) ) {
 817                         return '<span class="error">' .
 818                                 wfMsgForContent( 'unknown_extension_tag', $tagName ) .
 819                                 '</span>';
 820                 }
 821
 822                 $attributes = array();
 823                 foreach ( $args as $arg ) {
 824                         $bits = $arg->splitArg();
 825                         if ( strval( $bits['index'] ) === '' ) {
 826                                 $name = trim( $frame->expand( $bits['name'], PPFrame::STRIP_COMMENTS ) );
 827                                 $value = trim( $frame->expand( $bits['value'] ) );
 828                                 if ( preg_match( '/^(?:["\'](.+)["\']|""|\'\')$/s', $value, $m ) ) {
 829                                         $value = isset( $m[1] ) ? $m[1] : '';
 830                                 }
 831                                 $attributes[$name] = $value;
 832                         }
 833                 }
 834
 835                 $params = array(
 836                         'name' => $tagName,
 837                         'inner' => $inner,
 838                         'attributes' => $attributes,
 839                         'close' => "</$tagName>",
 840                 );
 841                 return $parser->extensionSubstitution( $params, $frame );
 842         }
 843 }