languages/Language.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  * @subpackage Language
   5  */
   6
   7 if( !defined( 'MEDIAWIKI' ) ) {
   8         echo "This file is part of MediaWiki, it is not a valid entry point.\n";
   9         exit( 1 );
  10 }
  11
  12 #
  13 # In general you should not make customizations in these language files
  14 # directly, but should use the MediaWiki: special namespace to customize
  15 # user interface messages through the wiki.
  16 # See http://meta.wikipedia.org/wiki/MediaWiki_namespace
  17 #
  18 # NOTE TO TRANSLATORS: Do not copy this whole file when making translations!
  19 # A lot of common constants and a base class with inheritable methods are
  20 # defined here, which should not be redefined. See the other LanguageXx.php
  21 # files for examples.
  22 #
  23
  24 # Read language names
  25 global $wgLanguageNames;
  26 require_once( 'Names.php' );
  27
  28 global $wgInputEncoding, $wgOutputEncoding;
  29 global $wgDBname, $wgMemc;
  30
  31 /**
  32  * These are always UTF-8, they exist only for backwards compatibility
  33  */
  34 $wgInputEncoding    = "UTF-8";
  35 $wgOutputEncoding       = "UTF-8";
  36
  37 if( function_exists( 'mb_strtoupper' ) ) {
  38         mb_internal_encoding('UTF-8');
  39 }
  40
  41 /* a fake language converter */
  42 class FakeConverter {
  43         var $mLang;
  44         function FakeConverter($langobj) {$this->mLang = $langobj;}
  45         function convert($t, $i) {return $t;}
  46         function parserConvert($t, $p) {return $t;}
  47         function getVariants() { return array( $this->mLang->getCode() ); }
  48         function getPreferredVariant() {return $this->mLang->getCode(); }
  49         function findVariantLink(&$l, &$n) {}
  50         function getExtraHashOptions() {return '';}
  51         function getParsedTitle() {return '';}
  52         function markNoConversion($text, $noParse=false) {return $text;}
  53         function convertCategoryKey( $key ) {return $key; }
  54         function convertLinkToAllVariants($text){ return array( $this->mLang->getCode() => $text); }
  55         function setNoTitleConvert(){}
  56 }
  57
  58 #--------------------------------------------------------------------------
  59 # Internationalisation code
  60 #--------------------------------------------------------------------------
  61
  62 class Language {
  63         var $mConverter, $mVariants, $mCode, $mLoaded = false;
  64
  65         static public $mLocalisationKeys = array( 'fallback', 'namespaceNames',
  66                 'quickbarSettings', 'skinNames', 'mathNames',
  67                 'bookstoreList', 'magicWords', 'messages', 'rtl', 'digitTransformTable',
  68                 'separatorTransformTable', 'fallback8bitEncoding', 'linkPrefixExtension',
  69                 'defaultUserOptionOverrides', 'linkTrail', 'namespaceAliases',
  70                 'dateFormats', 'datePreferences', 'datePreferenceMigrationMap',
  71                 'defaultDateFormat', 'extraUserToggles' );
  72
  73         static public $mMergeableMapKeys = array( 'messages', 'namespaceNames', 'mathNames',
  74                 'dateFormats', 'defaultUserOptionOverrides', 'magicWords' );
  75
  76         static public $mMergeableListKeys = array( 'extraUserToggles' );
  77
  78         static public $mLocalisationCache = array();
  79
  80         static public $mWeekdayMsgs = array(
  81                 'sunday', 'monday', 'tuesday', 'wednesday', 'thursday',
  82                 'friday', 'saturday'
  83         );
  84
  85         static public $mWeekdayAbbrevMsgs = array(
  86                 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'
  87         );
  88
  89         static public $mMonthMsgs = array(
  90                 'january', 'february', 'march', 'april', 'may_long', 'june',
  91                 'july', 'august', 'september', 'october', 'november',
  92                 'december'
  93         );
  94         static public $mMonthGenMsgs = array(
  95                 'january-gen', 'february-gen', 'march-gen', 'april-gen', 'may-gen', 'june-gen',
  96                 'july-gen', 'august-gen', 'september-gen', 'october-gen', 'november-gen',
  97                 'december-gen'
  98         );
  99         static public $mMonthAbbrevMsgs = array(
 100                 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
 101                 'sep', 'oct', 'nov', 'dec'
 102         );
 103
 104         /**
 105          * Create a language object for a given language code
 106          */
 107         static function factory( $code ) {
 108                 global $IP;
 109                 static $recursionLevel = 0;
 110
 111                 if ( $code == 'en' ) {
 112                         $class = 'Language';
 113                 } else {
 114                         $class = 'Language' . str_replace( '-', '_', ucfirst( $code ) );
 115                         // Preload base classes to work around APC/PHP5 bug
 116                         if ( file_exists( "$IP/languages/$class.deps.php" ) ) {
 117                                 include_once("$IP/languages/$class.deps.php");
 118                         }
 119                         if ( file_exists( "$IP/languages/$class.php" ) ) {
 120                                 include_once("$IP/languages/$class.php");
 121                         }
 122                 }
 123
 124                 if ( $recursionLevel > 5 ) {
 125                         throw new MWException( "Language fallback loop detected when creating class $class\n" );
 126                 }
 127
 128                 if( ! class_exists( $class ) ) {
 129                         $fallback = Language::getFallbackFor( $code );
 130                         ++$recursionLevel;
 131                         $lang = Language::factory( $fallback );
 132                         --$recursionLevel;
 133                         $lang->setCode( $code );
 134                 } else {
 135                         $lang = new $class;
 136                 }
 137
 138                 return $lang;
 139         }
 140
 141         function __construct() {
 142                 $this->mConverter = new FakeConverter($this);
 143                 // Set the code to the name of the descendant
 144                 if ( get_class( $this ) == 'Language' ) {
 145                         $this->mCode = 'en';
 146                 } else {
 147                         $this->mCode = str_replace( '_', '-', strtolower( substr( get_class( $this ), 8 ) ) );
 148                 }
 149         }
 150
 151         /**
 152          * Hook which will be called if this is the content language.
 153          * Descendants can use this to register hook functions or modify globals
 154          */
 155         function initContLang() {}
 156
 157         /**
 158          * @deprecated
 159          * @return array
 160          */
 161         function getDefaultUserOptions() {
 162                 return User::getDefaultOptions();
 163         }
 164
 165         /**
 166          * Exports $wgBookstoreListEn
 167          * @return array
 168          */
 169         function getBookstoreList() {
 170                 $this->load();
 171                 return $this->bookstoreList;
 172         }
 173
 174         /**
 175          * @return array
 176          */
 177         function getNamespaces() {
 178                 $this->load();
 179                 return $this->namespaceNames;
 180         }
 181
 182         /**
 183          * A convenience function that returns the same thing as
 184          * getNamespaces() except with the array values changed to ' '
 185          * where it found '_', useful for producing output to be displayed
 186          * e.g. in <select> forms.
 187          *
 188          * @return array
 189          */
 190         function getFormattedNamespaces() {
 191                 $ns = $this->getNamespaces();
 192                 foreach($ns as $k => $v) {
 193                         $ns[$k] = strtr($v, '_', ' ');
 194                 }
 195                 return $ns;
 196         }
 197
 198         /**
 199          * Get a namespace value by key
 200          * <code>
 201          * $mw_ns = $wgContLang->getNsText( NS_MEDIAWIKI );
 202          * echo $mw_ns; // prints 'MediaWiki'
 203          * </code>
 204          *
 205          * @param int $index the array key of the namespace to return
 206          * @return mixed, string if the namespace value exists, otherwise false
 207          */
 208         function getNsText( $index ) {
 209                 $ns = $this->getNamespaces();
 210                 return isset( $ns[$index] ) ? $ns[$index] : false;
 211         }
 212
 213         /**
 214          * A convenience function that returns the same thing as
 215          * getNsText() except with '_' changed to ' ', useful for
 216          * producing output.
 217          *
 218          * @return array
 219          */
 220         function getFormattedNsText( $index ) {
 221                 $ns = $this->getNsText( $index );
 222                 return strtr($ns, '_', ' ');
 223         }
 224
 225         /**
 226          * Get a namespace key by value, case insensetive.
 227          *
 228          * @param string $text
 229          * @return mixed An integer if $text is a valid value otherwise false
 230          */
 231         function getNsIndex( $text ) {
 232                 $this->load();
 233                 $index = @$this->mNamespaceIds[$this->lc($text)];
 234                 if ( is_null( $index ) ) {
 235                         return false;
 236                 } else {
 237                         return $index;
 238                 }
 239         }
 240
 241         /**
 242          * short names for language variants used for language conversion links.
 243          *
 244          * @param string $code
 245          * @return string
 246          */
 247         function getVariantname( $code ) {
 248                 return $this->getMessageFromDB( "variantname-$code" );
 249         }
 250
 251         function specialPage( $name ) {
 252                 return $this->getNsText(NS_SPECIAL) . ':' . $name;
 253         }
 254
 255         function getQuickbarSettings() {
 256                 $this->load();
 257                 return $this->quickbarSettings;
 258         }
 259
 260         function getSkinNames() {
 261                 $this->load();
 262                 return $this->skinNames;
 263         }
 264
 265         function getMathNames() {
 266                 $this->load();
 267                 return $this->mathNames;
 268         }
 269
 270         function getDatePreferences() {
 271                 $this->load();
 272                 return $this->datePreferences;
 273         }
 274
 275         function getDateFormats() {
 276                 $this->load();
 277                 return $this->dateFormats;
 278         }
 279
 280         function getDefaultDateFormat() {
 281                 $this->load();
 282                 return $this->defaultDateFormat;
 283         }
 284
 285         function getDatePreferenceMigrationMap() {
 286                 $this->load();
 287                 return $this->datePreferenceMigrationMap;
 288         }
 289
 290         function getDefaultUserOptionOverrides() {
 291                 $this->load();
 292                 return $this->defaultUserOptionOverrides;
 293         }
 294
 295         function getExtraUserToggles() {
 296                 $this->load();
 297                 return $this->extraUserToggles;
 298         }
 299
 300         function getUserToggle( $tog ) {
 301                 return $this->getMessageFromDB( "tog-$tog" );
 302         }
 303
 304         /**
 305          * Get language names, indexed by code.
 306          * If $customisedOnly is true, only returns codes with a messages file
 307          */
 308         function getLanguageNames( $customisedOnly = false ) {
 309                 global $wgLanguageNames;
 310                 if ( !$customisedOnly ) {
 311                         return $wgLanguageNames;
 312                 }
 313
 314                 global $IP;
 315                 $messageFiles = glob( "$IP/languages/Messages*.php" );
 316                 $names = array();
 317                 foreach ( $messageFiles as $file ) {
 318                         if( preg_match( '/Messages([A-Z][a-z_]+)\.php$/', $file, $m ) ) {
 319                                 $code = str_replace( '_', '-', strtolower( $m[1] ) );
 320                                 if ( isset( $wgLanguageNames[$code] ) ) {
 321                                         $names[$code] = $wgLanguageNames[$code];
 322                                 }
 323                         }
 324                 }
 325                 return $names;
 326         }
 327
 328         /**
 329          * Ugly hack to get a message maybe from the MediaWiki namespace, if this
 330          * language object is the content or user language.
 331          */
 332         function getMessageFromDB( $msg ) {
 333                 global $wgContLang, $wgLang;
 334                 if ( $wgContLang->getCode() == $this->getCode() ) {
 335                         # Content language
 336                         return wfMsgForContent( $msg );
 337                 } elseif ( $wgLang->getCode() == $this->getCode() ) {
 338                         # User language
 339                         return wfMsg( $msg );
 340                 } else {
 341                         # Neither, get from localisation
 342                         return $this->getMessage( $msg );
 343                 }
 344         }
 345
 346         function getLanguageName( $code ) {
 347                 global $wgLanguageNames;
 348                 if ( ! array_key_exists( $code, $wgLanguageNames ) ) {
 349                         return '';
 350                 }
 351                 return $wgLanguageNames[$code];
 352         }
 353
 354         function getMonthName( $key ) {
 355                 return $this->getMessageFromDB( self::$mMonthMsgs[$key-1] );
 356         }
 357
 358         function getMonthNameGen( $key ) {
 359                 return $this->getMessageFromDB( self::$mMonthGenMsgs[$key-1] );
 360         }
 361
 362         function getMonthAbbreviation( $key ) {
 363                 return $this->getMessageFromDB( self::$mMonthAbbrevMsgs[$key-1] );
 364         }
 365
 366         function getWeekdayName( $key ) {
 367                 return $this->getMessageFromDB( self::$mWeekdayMsgs[$key-1] );
 368         }
 369
 370         function getWeekdayAbbreviation( $key ) {
 371                 return $this->getMessageFromDB( self::$mWeekdayAbbrevMsgs[$key-1] );
 372         }
 373
 374         /**
 375          * Used by date() and time() to adjust the time output.
 376          * @public
 377          * @param int   $ts the time in date('YmdHis') format
 378          * @param mixed $tz adjust the time by this amount (default false,
 379          *                  mean we get user timecorrection setting)
 380          * @return int
 381          */
 382         function userAdjust( $ts, $tz = false ) {
 383                 global $wgUser, $wgLocalTZoffset;
 384
 385                 if (!$tz) {
 386                         $tz = $wgUser->getOption( 'timecorrection' );
 387                 }
 388
 389                 # minutes and hours differences:
 390                 $minDiff = 0;
 391                 $hrDiff  = 0;
 392
 393                 if ( $tz === '' ) {
 394                         # Global offset in minutes.
 395                         if( isset($wgLocalTZoffset) ) {
 396                                 $hrDiff = $wgLocalTZoffset % 60;
 397                                 $minDiff = $wgLocalTZoffset - ($hrDiff * 60);
 398                         }
 399                 } elseif ( strpos( $tz, ':' ) !== false ) {
 400                         $tzArray = explode( ':', $tz );
 401                         $hrDiff = intval($tzArray[0]);
 402                         $minDiff = intval($hrDiff < 0 ? -$tzArray[1] : $tzArray[1]);
 403                 } else {
 404                         $hrDiff = intval( $tz );
 405                 }
 406
 407                 # No difference ? Return time unchanged
 408                 if ( 0 == $hrDiff && 0 == $minDiff ) { return $ts; }
 409
 410                 # Generate an adjusted date
 411                 $t = mktime( (
 412                   (int)substr( $ts, 8, 2) ) + $hrDiff, # Hours
 413                   (int)substr( $ts, 10, 2 ) + $minDiff, # Minutes
 414                   (int)substr( $ts, 12, 2 ), # Seconds
 415                   (int)substr( $ts, 4, 2 ), # Month
 416                   (int)substr( $ts, 6, 2 ), # Day
 417                   (int)substr( $ts, 0, 4 ) ); #Year
 418                 return date( 'YmdHis', $t );
 419         }
 420
 421         /**
 422          * This is a workalike of PHP's date() function, but with better
 423          * internationalisation, a reduced set of format characters, and a better
 424          * escaping format.
 425          *
 426          * Supported format characters are dDjlFmMnYyHis. See the PHP manual for
 427          * definitions. There are a number of extensions, which start with "x":
 428          *
 429          *    xn   Do not translate digits of the next numeric format character
 430          *    xr   Use roman numerals for the next numeric format character
 431          *    xx   Literal x
 432          *    xg   Genitive month name
 433          *
 434          * Characters enclosed in double quotes will be considered literal (with
 435          * the quotes themselves removed). Unmatched quotes will be considered
 436          * literal quotes. Example:
 437          *
 438          * "The month is" F       => The month is January
 439          * i's"                   => 20'11"
 440          *
 441          * Backslash escaping is also supported.
 442          *
 443          * @param string $format
 444          * @param string $ts 14-character timestamp
 445          *      YYYYMMDDHHMMSS
 446          *      01234567890123
 447          */
 448         function sprintfDate( $format, $ts ) {
 449                 $s = '';
 450                 $raw = false;
 451                 $roman = false;
 452                 for ( $p = 0; $p < strlen( $format ); $p++ ) {
 453                         $num = false;
 454                         $code = $format[$p];
 455                         if ( $code == 'x' && $p < strlen( $format ) - 1 ) {
 456                                 $code .= $format[++$p];
 457                         }
 458
 459                         switch ( $code ) {
 460                                 case 'xx':
 461                                         $s .= 'x';
 462                                         break;
 463                                 case 'xn':
 464                                         $raw = true;
 465                                         break;
 466                                 case 'xr':
 467                                         $roman = true;
 468                                         break;
 469                                 case 'xg':
 470                                         $s .= $this->getMonthNameGen( substr( $ts, 4, 2 ) );
 471                                         break;
 472                                 case 'd':
 473                                         $num = substr( $ts, 6, 2 );
 474                                         break;
 475                                 case 'D':
 476                                         $s .= $this->getWeekdayAbbreviation( self::calculateWeekday( $ts ) );
 477                                         break;
 478                                 case 'j':
 479                                         $num = intval( substr( $ts, 6, 2 ) );
 480                                         break;
 481                                 case 'l':
 482                                         $s .= $this->getWeekdayName( self::calculateWeekday( $ts ) );
 483                                         break;
 484                                 case 'F':
 485                                         $s .= $this->getMonthName( substr( $ts, 4, 2 ) );
 486                                         break;
 487                                 case 'm':
 488                                         $num = substr( $ts, 4, 2 );
 489                                         break;
 490                                 case 'M':
 491                                         $s .= $this->getMonthAbbreviation( substr( $ts, 4, 2 ) );
 492                                         break;
 493                                 case 'n':
 494                                         $num = intval( substr( $ts, 4, 2 ) );
 495                                         break;
 496                                 case 'Y':
 497                                         $num = substr( $ts, 0, 4 );
 498                                         break;
 499                                 case 'y':
 500                                         $num = substr( $ts, 2, 2 );
 501                                         break;
 502                                 case 'H':
 503                                         $num = substr( $ts, 8, 2 );
 504                                         break;
 505                                 case 'G':
 506                                         $num = intval( substr( $ts, 8, 2 ) );
 507                                         break;
 508                                 case 'i':
 509                                         $num = substr( $ts, 10, 2 );
 510                                         break;
 511                                 case 's':
 512                                         $num = substr( $ts, 12, 2 );
 513                                         break;
 514                                 case '\\':
 515                                         # Backslash escaping
 516                                         if ( $p < strlen( $format ) - 1 ) {
 517                                                 $s .= $format[++$p];
 518                                         } else {
 519                                                 $s .= '\\';
 520                                         }
 521                                         break;
 522                                 case '"':
 523                                         # Quoted literal
 524                                         if ( $p < strlen( $format ) - 1 ) {
 525                                                 $endQuote = strpos( $format, '"', $p + 1 );
 526                                                 if ( $endQuote === false ) {
 527                                                         # No terminating quote, assume literal "
 528                                                         $s .= '"';
 529                                                 } else {
 530                                                         $s .= substr( $format, $p + 1, $endQuote - $p - 1 );
 531                                                         $p = $endQuote;
 532                                                 }
 533                                         } else {
 534                                                 # Quote at end of string, assume literal "
 535                                                 $s .= '"';
 536                                         }
 537                                         break;
 538                                 default:
 539                                         $s .= $format[$p];
 540                         }
 541                         if ( $num !== false ) {
 542                                 if ( $raw ) {
 543                                         $s .= $num;
 544                                         $raw = false;
 545                                 } elseif ( $roman ) {
 546                                         $s .= Language::romanNumeral( $num );
 547                                         $roman = false;
 548                                 } else {
 549                                         $s .= $this->formatNum( $num, true );
 550                                 }
 551                                 $num = false;
 552                         }
 553                 }
 554                 return $s;
 555         }
 556
 557         /**
 558          * Roman number formatting up to 100
 559          */
 560         static function romanNumeral( $num ) {
 561                 static $units = array( 0, 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX', 'X' );
 562                 static $decades = array( 0, 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC', 'C' );
 563                 $num = intval( $num );
 564                 if ( $num > 100 || $num <= 0 ) {
 565                         return $num;
 566                 }
 567                 $s = '';
 568                 if ( $num >= 10 ) {
 569                         $s .= $decades[floor( $num / 10 )];
 570                         $num = $num % 10;
 571                 }
 572                 if ( $num >= 1 ) {
 573                         $s .= $units[$num];
 574                 }
 575                 return $s;
 576         }
 577
 578         /**
 579          * Calculate the day of the week for a 14-character timestamp
 580          * 1 for Sunday through to 7 for Saturday
 581          * This takes about 100us on a slow computer
 582          */
 583         static function calculateWeekday( $ts ) {
 584                 return date( 'w', wfTimestamp( TS_UNIX, $ts ) ) + 1;
 585         }
 586
 587         /**
 588          * This is meant to be used by time(), date(), and timeanddate() to get
 589          * the date preference they're supposed to use, it should be used in
 590          * all children.
 591          *
 592          *<code>
 593          * function timeanddate([...], $format = true) {
 594          *      $datePreference = $this->dateFormat($format);
 595          * [...]
 596          * }
 597          *</code>
 598          *
 599          * @param mixed $usePrefs: if true, the user's preference is used
 600          *                         if false, the site/language default is used
 601          *                         if int/string, assumed to be a format.
 602          * @return string
 603          */
 604         function dateFormat( $usePrefs = true ) {
 605                 global $wgUser;
 606
 607                 if( is_bool( $usePrefs ) ) {
 608                         if( $usePrefs ) {
 609                                 $datePreference = $wgUser->getDatePreference();
 610                         } else {
 611                                 $options = User::getDefaultOptions();
 612                                 $datePreference = (string)$options['date'];
 613                         }
 614                 } else {
 615                         $datePreference = (string)$usePrefs;
 616                 }
 617
 618                 // return int
 619                 if( $datePreference == '' ) {
 620                         return 'default';
 621                 }
 622
 623                 return $datePreference;
 624         }
 625
 626         /**
 627          * @public
 628          * @param mixed  $ts the time format which needs to be turned into a
 629          *               date('YmdHis') format with wfTimestamp(TS_MW,$ts)
 630          * @param bool   $adj whether to adjust the time output according to the
 631          *               user configured offset ($timecorrection)
 632          * @param mixed  $format true to use user's date format preference
 633          * @param string $timecorrection the time offset as returned by
 634          *               validateTimeZone() in Special:Preferences
 635          * @return string
 636          */
 637         function date( $ts, $adj = false, $format = true, $timecorrection = false ) {
 638                 $this->load();
 639                 if ( $adj ) {
 640                         $ts = $this->userAdjust( $ts, $timecorrection );
 641                 }
 642
 643                 $pref = $this->dateFormat( $format );
 644                 if( $pref == 'default' || !isset( $this->dateFormats["$pref date"] ) ) {
 645                         $pref = $this->defaultDateFormat;
 646                 }
 647                 return $this->sprintfDate( $this->dateFormats["$pref date"], $ts );
 648         }
 649
 650         /**
 651         * @public
 652         * @param mixed  $ts the time format which needs to be turned into a
 653         *               date('YmdHis') format with wfTimestamp(TS_MW,$ts)
 654         * @param bool   $adj whether to adjust the time output according to the
 655         *               user configured offset ($timecorrection)
 656         * @param mixed  $format true to use user's date format preference
 657         * @param string $timecorrection the time offset as returned by
 658         *               validateTimeZone() in Special:Preferences
 659         * @return string
 660         */
 661         function time( $ts, $adj = false, $format = true, $timecorrection = false ) {
 662                 $this->load();
 663                 if ( $adj ) {
 664                         $ts = $this->userAdjust( $ts, $timecorrection );
 665                 }
 666
 667                 $pref = $this->dateFormat( $format );
 668                 if( $pref == 'default' || !isset( $this->dateFormats["$pref time"] ) ) {
 669                         $pref = $this->defaultDateFormat;
 670                 }
 671                 return $this->sprintfDate( $this->dateFormats["$pref time"], $ts );
 672         }
 673
 674         /**
 675         * @public
 676         * @param mixed  $ts the time format which needs to be turned into a
 677         *               date('YmdHis') format with wfTimestamp(TS_MW,$ts)
 678         * @param bool   $adj whether to adjust the time output according to the
 679         *               user configured offset ($timecorrection)
 680
 681         * @param mixed  $format what format to return, if it's false output the
 682         *               default one (default true)
 683         * @param string $timecorrection the time offset as returned by
 684         *               validateTimeZone() in Special:Preferences
 685         * @return string
 686         */
 687         function timeanddate( $ts, $adj = false, $format = true, $timecorrection = false) {
 688                 $this->load();
 689                 if ( $adj ) {
 690                         $ts = $this->userAdjust( $ts, $timecorrection );
 691                 }
 692
 693                 $pref = $this->dateFormat( $format );
 694                 if( $pref == 'default' || !isset( $this->dateFormats["$pref both"] ) ) {
 695                         $pref = $this->defaultDateFormat;
 696                 }
 697
 698                 return $this->sprintfDate( $this->dateFormats["$pref both"], $ts );
 699         }
 700
 701         function getMessage( $key ) {
 702                 $this->load();
 703                 return @$this->messages[$key];
 704         }
 705
 706         function getAllMessages() {
 707                 $this->load();
 708                 return $this->messages;
 709         }
 710
 711         function iconv( $in, $out, $string ) {
 712                 # For most languages, this is a wrapper for iconv
 713                 return iconv( $in, $out, $string );
 714         }
 715
 716         // callback functions for uc(), lc(), ucwords(), ucwordbreaks()
 717         function ucwordbreaksCallbackAscii($matches){
 718                 return $this->ucfirst($matches[1]);
 719         }
 720
 721         function ucwordbreaksCallbackMB($matches){
 722                 return mb_strtoupper($matches[0]);
 723         }
 724
 725         function ucCallback($matches){
 726                 list( $wikiUpperChars ) = self::getCaseMaps();
 727                 return strtr( $matches[1], $wikiUpperChars );
 728         }
 729
 730         function lcCallback($matches){
 731                 list( , $wikiLowerChars ) = self::getCaseMaps();
 732                 return strtr( $matches[1], $wikiLowerChars );
 733         }
 734
 735         function ucwordsCallbackMB($matches){
 736                 return mb_strtoupper($matches[0]);
 737         }
 738
 739         function ucwordsCallbackWiki($matches){
 740                 list( $wikiUpperChars ) = self::getCaseMaps();
 741                 return strtr( $matches[0], $wikiUpperChars );
 742         }
 743
 744         function ucfirst( $str ) {
 745                 return self::uc( $str, true );
 746         }
 747
 748         function uc( $str, $first = false ) {
 749                 if ( function_exists( 'mb_strtoupper' ) )
 750                         if ( $first )
 751                                 if ( self::isMultibyte( $str ) )
 752                                         return mb_strtoupper( mb_substr( $str, 0, 1 ) ) . mb_substr( $str, 1 );
 753                                 else
 754                                         return ucfirst( $str );
 755                         else
 756                                 return self::isMultibyte( $str ) ? mb_strtoupper( $str ) : strtoupper( $str );
 757                 else
 758                         if ( self::isMultibyte( $str ) ) {
 759                                 list( $wikiUpperChars ) = $this->getCaseMaps();
 760                                 $x = $first ? '^' : '';
 761                                 return preg_replace_callback(
 762                                         "/$x([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/",
 763                                         array($this,"ucCallback"),
 764                                         $str
 765                                 );
 766                         } else
 767                                 return $first ? ucfirst( $str ) : strtoupper( $str );
 768         }
 769
 770         function lcfirst( $str ) {
 771                 return self::lc( $str, true );
 772         }
 773
 774         function lc( $str, $first = false ) {
 775                 if ( function_exists( 'mb_strtolower' ) )
 776                         if ( $first )
 777                                 if ( self::isMultibyte( $str ) )
 778                                         return mb_strtolower( mb_substr( $str, 0, 1 ) ) . mb_substr( $str, 1 );
 779                                 else
 780                                         return strtolower( substr( $str, 0, 1 ) ) . substr( $str, 1 );
 781                         else
 782                                 return self::isMultibyte( $str ) ? mb_strtolower( $str ) : strtolower( $str );
 783                 else
 784                         if ( self::isMultibyte( $str ) ) {
 785                                 list( , $wikiLowerChars ) = self::getCaseMaps();
 786                                 $x = $first ? '^' : '';
 787                                 return preg_replace_callback(
 788                                         "/$x([A-Z]|[\\xc0-\\xff][\\x80-\\xbf]*)/",
 789                                         array($this,"lcCallback"),
 790                                         $str
 791                                 );
 792                         } else
 793                                 return $first ? strtolower( substr( $str, 0, 1 ) ) . substr( $str, 1 ) : strtolower( $str );
 794         }
 795
 796         function isMultibyte( $str ) {
 797                 return (bool)preg_match( '/[\x80-\xff]/', $str );
 798         }
 799
 800         function ucwords($str) {
 801                 if ( self::isMultibyte( $str ) ) {
 802                         $str = self::lc($str);
 803
 804                         // regexp to find first letter in each word (i.e. after each space)
 805                         $replaceRegexp = "/^([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)| ([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/";
 806
 807                         // function to use to capitalize a single char
 808                         if ( function_exists( 'mb_strtoupper' ) )
 809                                 return preg_replace_callback(
 810                                         $replaceRegexp,
 811                                         array($this,"ucwordsCallbackMB"),
 812                                         $str
 813                                 );
 814                         else
 815                                 return preg_replace_callback(
 816                                         $replaceRegexp,
 817                                         array($this,"ucwordsCallbackWiki"),
 818                                         $str
 819                                 );
 820                 }
 821                 else
 822                         return ucwords( strtolower( $str ) );
 823         }
 824
 825   # capitalize words at word breaks
 826         function ucwordbreaks($str){
 827                 if (self::isMultibyte( $str ) ) {
 828                         $str = self::lc($str);
 829
 830                         // since \b doesn't work for UTF-8, we explicitely define word break chars
 831                         $breaks= "[ \-\(\)\}\{\.,\?!]";
 832
 833                         // find first letter after word break
 834                         $replaceRegexp = "/^([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)|$breaks([a-z]|[\\xc0-\\xff][\\x80-\\xbf]*)/";
 835
 836                         if ( function_exists( 'mb_strtoupper' ) )
 837                                 return preg_replace_callback(
 838                                         $replaceRegexp,
 839                                         array($this,"ucwordbreaksCallbackMB"),
 840                                         $str
 841                                 );
 842                         else
 843                                 return preg_replace_callback(
 844                                         $replaceRegexp,
 845                                         array($this,"ucwordsCallbackWiki"),
 846                                         $str
 847                                 );
 848                 }
 849                 else
 850                         return preg_replace_callback(
 851                         '/\b([\w\x80-\xff]+)\b/',
 852                         array($this,"ucwordbreaksCallbackAscii"),
 853                         $str );
 854         }
 855
 856         function checkTitleEncoding( $s ) {
 857                 if( is_array( $s ) ) {
 858                         wfDebugDieBacktrace( 'Given array to checkTitleEncoding.' );
 859                 }
 860                 # Check for non-UTF-8 URLs
 861                 $ishigh = preg_match( '/[\x80-\xff]/', $s);
 862                 if(!$ishigh) return $s;
 863
 864                 $isutf8 = preg_match( '/^([\x00-\x7f]|[\xc0-\xdf][\x80-\xbf]|' .
 865                 '[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xf7][\x80-\xbf]{3})+$/', $s );
 866                 if( $isutf8 ) return $s;
 867
 868                 return $this->iconv( $this->fallback8bitEncoding(), "utf-8", $s );
 869         }
 870
 871         function fallback8bitEncoding() {
 872                 $this->load();
 873                 return $this->fallback8bitEncoding;
 874         }
 875
 876         /**
 877          * Some languages have special punctuation to strip out
 878          * or characters which need to be converted for MySQL's
 879          * indexing to grok it correctly. Make such changes here.
 880          *
 881          * @param string $in
 882          * @return string
 883          */
 884         function stripForSearch( $string ) {
 885                 # MySQL fulltext index doesn't grok utf-8, so we
 886                 # need to fold cases and convert to hex
 887
 888                 wfProfileIn( __METHOD__ );
 889                 if( function_exists( 'mb_strtolower' ) ) {
 890                         $out = preg_replace(
 891                                 "/([\\xc0-\\xff][\\x80-\\xbf]*)/e",
 892                                 "'U8' . bin2hex( \"$1\" )",
 893                                 mb_strtolower( $string ) );
 894                 } else {
 895                         list( , $wikiLowerChars ) = self::getCaseMaps();
 896                         $out = preg_replace(
 897                                 "/([\\xc0-\\xff][\\x80-\\xbf]*)/e",
 898                                 "'U8' . bin2hex( strtr( \"\$1\", \$wikiLowerChars ) )",
 899                                 $string );
 900                 }
 901                 wfProfileOut( __METHOD__ );
 902                 return $out;
 903         }
 904
 905         function convertForSearchResult( $termsArray ) {
 906                 # some languages, e.g. Chinese, need to do a conversion
 907                 # in order for search results to be displayed correctly
 908                 return $termsArray;
 909         }
 910
 911         /**
 912          * Get the first character of a string.
 913          *
 914          * @param string $s
 915          * @return string
 916          */
 917         function firstChar( $s ) {
 918                 preg_match( '/^([\x00-\x7f]|[\xc0-\xdf][\x80-\xbf]|' .
 919                 '[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xf7][\x80-\xbf]{3})/', $s, $matches);
 920
 921                 return isset( $matches[1] ) ? $matches[1] : "";
 922         }
 923
 924         function initEncoding() {
 925                 # Some languages may have an alternate char encoding option
 926                 # (Esperanto X-coding, Japanese furigana conversion, etc)
 927                 # If this language is used as the primary content language,
 928                 # an override to the defaults can be set here on startup.
 929         }
 930
 931         function recodeForEdit( $s ) {
 932                 # For some languages we'll want to explicitly specify
 933                 # which characters make it into the edit box raw
 934                 # or are converted in some way or another.
 935                 # Note that if wgOutputEncoding is different from
 936                 # wgInputEncoding, this text will be further converted
 937                 # to wgOutputEncoding.
 938                 global $wgEditEncoding;
 939                 if( $wgEditEncoding == '' or
 940                   $wgEditEncoding == 'UTF-8' ) {
 941                         return $s;
 942                 } else {
 943                         return $this->iconv( 'UTF-8', $wgEditEncoding, $s );
 944                 }
 945         }
 946
 947         function recodeInput( $s ) {
 948                 # Take the previous into account.
 949                 global $wgEditEncoding;
 950                 if($wgEditEncoding != "") {
 951                         $enc = $wgEditEncoding;
 952                 } else {
 953                         $enc = 'UTF-8';
 954                 }
 955                 if( $enc == 'UTF-8' ) {
 956                         return $s;
 957                 } else {
 958                         return $this->iconv( $enc, 'UTF-8', $s );
 959                 }
 960         }
 961
 962         /**
 963          * For right-to-left language support
 964          *
 965          * @return bool
 966          */
 967         function isRTL() {
 968                 $this->load();
 969                 return $this->rtl;
 970         }
 971
 972         /**
 973          * A hidden direction mark (LRM or RLM), depending on the language direction
 974          *
 975          * @return string
 976          */
 977         function getDirMark() {
 978                 return $this->isRTL() ? "\xE2\x80\x8F" : "\xE2\x80\x8E";
 979         }
 980
 981         /**
 982          * An arrow, depending on the language direction
 983          *
 984          * @return string
 985          */
 986         function getArrow() {
 987                 return $this->isRTL() ? '←' : '→';
 988         }
 989
 990         /**
 991          * To allow "foo[[bar]]" to extend the link over the whole word "foobar"
 992          *
 993          * @return bool
 994          */
 995         function linkPrefixExtension() {
 996                 $this->load();
 997                 return $this->linkPrefixExtension;
 998         }
 999
1000         function &getMagicWords() {
1001                 $this->load();
1002                 return $this->magicWords;
1003         }
1004
1005         # Fill a MagicWord object with data from here
1006         function getMagic( &$mw ) {
1007                 if ( !isset( $this->mMagicExtensions ) ) {
1008                         $this->mMagicExtensions = array();
1009                         wfRunHooks( 'LanguageGetMagic', array( &$this->mMagicExtensions, $this->getCode() ) );
1010                 }
1011                 if ( isset( $this->mMagicExtensions[$mw->mId] ) ) {
1012                         $rawEntry = $this->mMagicExtensions[$mw->mId];
1013                 } else {
1014                         $magicWords =& $this->getMagicWords();
1015                         if ( isset( $magicWords[$mw->mId] ) ) {
1016                                 $rawEntry = $magicWords[$mw->mId];
1017                         } else {
1018                                 # Fall back to English if local list is incomplete
1019                                 $magicWords =& Language::getMagicWords();
1020                                 $rawEntry = $magicWords[$mw->mId];
1021                         }
1022                 }
1023
1024                 if( !is_array( $rawEntry ) ) {
1025                         error_log( "\"$rawEntry\" is not a valid magic thingie for \"$mw->mId\"" );
1026                 }
1027                 $mw->mCaseSensitive = $rawEntry[0];
1028                 $mw->mSynonyms = array_slice( $rawEntry, 1 );
1029         }
1030
1031         /**
1032          * Italic is unsuitable for some languages
1033          *
1034          * @public
1035          *
1036          * @param string $text The text to be emphasized.
1037          * @return string
1038          */
1039         function emphasize( $text ) {
1040                 return "<em>$text</em>";
1041         }
1042
1043          /**
1044          * Normally we output all numbers in plain en_US style, that is
1045          * 293,291.235 for twohundredninetythreethousand-twohundredninetyone
1046          * point twohundredthirtyfive. However this is not sutable for all
1047          * languages, some such as Pakaran want ੨੯੩,੨੯੫.੨੩੫ and others such as
1048          * Icelandic just want to use commas instead of dots, and dots instead
1049          * of commas like "293.291,235".
1050          *
1051          * An example of this function being called:
1052          * <code>
1053          * wfMsg( 'message', $wgLang->formatNum( $num ) )
1054          * </code>
1055          *
1056          * See LanguageGu.php for the Gujarati implementation and
1057          * LanguageIs.php for the , => . and . => , implementation.
1058          *
1059          * @todo check if it's viable to use localeconv() for the decimal
1060          *       seperator thing.
1061          * @public
1062          * @param mixed $number the string to be formatted, should be an integer or
1063          *        a floating point number.
1064          * @param bool $nocommafy Set to true for special numbers like dates
1065          * @return string
1066          */
1067         function formatNum( $number, $nocommafy = false ) {
1068                 global $wgTranslateNumerals;
1069                 if (!$nocommafy) {
1070                         $number = $this->commafy($number);
1071                         $s = $this->separatorTransformTable();
1072                         if (!is_null($s)) { $number = strtr($number, $s); }
1073                 }
1074
1075                 if ($wgTranslateNumerals) {
1076                         $s = $this->digitTransformTable();
1077                         if (!is_null($s)) { $number = strtr($number, $s); }
1078                 }
1079
1080                 return $number;
1081         }
1082
1083         /**
1084          * Adds commas to a given number
1085          *
1086          * @param mixed $_
1087          * @return string
1088          */
1089         function commafy($_) {
1090                 return strrev((string)preg_replace('/(\d{3})(?=\d)(?!\d*\.)/','$1,',strrev($_)));
1091         }
1092
1093         function digitTransformTable() {
1094                 $this->load();
1095                 return $this->digitTransformTable;
1096         }
1097
1098         function separatorTransformTable() {
1099                 $this->load();
1100                 return $this->separatorTransformTable;
1101         }
1102
1103
1104         /**
1105          * For the credit list in includes/Credits.php (action=credits)
1106          *
1107          * @param array $l
1108          * @return string
1109          */
1110         function listToText( $l ) {
1111                 $s = '';
1112                 $m = count($l) - 1;
1113                 for ($i = $m; $i >= 0; $i--) {
1114                         if ($i == $m) {
1115                                 $s = $l[$i];
1116                         } else if ($i == $m - 1) {
1117                                 $s = $l[$i] . ' ' . $this->getMessageFromDB( 'and' ) . ' ' . $s;
1118                         } else {
1119                                 $s = $l[$i] . ', ' . $s;
1120                         }
1121                 }
1122                 return $s;
1123         }
1124
1125         # Crop a string from the beginning or end to a certain number of bytes.
1126         # (Bytes are used because our storage has limited byte lengths for some
1127         # columns in the database.) Multibyte charsets will need to make sure that
1128         # only whole characters are included!
1129         #
1130         # $length does not include the optional ellipsis.
1131         # If $length is negative, snip from the beginning
1132         function truncate( $string, $length, $ellipsis = "" ) {
1133                 if( $length == 0 ) {
1134                         return $ellipsis;
1135                 }
1136                 if ( strlen( $string ) <= abs( $length ) ) {
1137                         return $string;
1138                 }
1139                 if( $length > 0 ) {
1140                         $string = substr( $string, 0, $length );
1141                         $char = ord( $string[strlen( $string ) - 1] );
1142                         if ($char >= 0xc0) {
1143                                 # We got the first byte only of a multibyte char; remove it.
1144                                 $string = substr( $string, 0, -1 );
1145                         } elseif( $char >= 0x80 &&
1146                                   preg_match( '/^(.*)(?:[\xe0-\xef][\x80-\xbf]|' .
1147                                               '[\xf0-\xf7][\x80-\xbf]{1,2})$/', $string, $m ) ) {
1148                             # We chopped in the middle of a character; remove it
1149                                 $string = $m[1];
1150                         }
1151                         return $string . $ellipsis;
1152                 } else {
1153                         $string = substr( $string, $length );
1154                         $char = ord( $string[0] );
1155                         if( $char >= 0x80 && $char < 0xc0 ) {
1156                                 # We chopped in the middle of a character; remove the whole thing
1157                                 $string = preg_replace( '/^[\x80-\xbf]+/', '', $string );
1158                         }
1159                         return $ellipsis . $string;
1160                 }
1161         }
1162
1163         /**
1164          * Grammatical transformations, needed for inflected languages
1165          * Invoked by putting {{grammar:case|word}} in a message
1166          *
1167          * @param string $word
1168          * @param string $case
1169          * @return string
1170          */
1171         function convertGrammar( $word, $case ) {
1172                 global $wgGrammarForms;
1173                 if ( isset($wgGrammarForms['en'][$case][$word]) ) {
1174                         return $wgGrammarForms['en'][$case][$word];
1175                 }
1176                 return $word;
1177         }
1178
1179         /**
1180          * Plural form transformations, needed for some languages.
1181          * For example, where are 3 form of plural in Russian and Polish,
1182          * depending on "count mod 10". See [[w:Plural]]
1183          * For English it is pretty simple.
1184          *
1185          * Invoked by putting {{plural:count|wordform1|wordform2}}
1186          * or {{plural:count|wordform1|wordform2|wordform3}}
1187          *
1188          * Example: {{plural:{{NUMBEROFARTICLES}}|article|articles}}
1189          *
1190          * @param integer $count
1191          * @param string $wordform1
1192          * @param string $wordform2
1193          * @param string $wordform3 (optional)
1194          * @return string
1195          */
1196         function convertPlural( $count, $w1, $w2, $w3) {
1197                 return $count == '1' ? $w1 : $w2;
1198         }
1199
1200         /**
1201          * For translaing of expiry times
1202          * @param string The validated block time in English
1203          * @return Somehow translated block time
1204          * @see LanguageFi.php for example implementation
1205          */
1206         function translateBlockExpiry( $str ) {
1207
1208                 $scBlockExpiryOptions = $this->getMessageFromDB( 'ipboptions' );
1209
1210                 if ( $scBlockExpiryOptions == '-') {
1211                         return $str;
1212                 }
1213
1214                 foreach (explode(',', $scBlockExpiryOptions) as $option) {
1215                         if ( strpos($option, ":") === false )
1216                                 continue;
1217                         list($show, $value) = explode(":", $option);
1218                         if ( strcmp ( $str, $value) == 0 )
1219                                 return '<span title="' . htmlspecialchars($str). '">' .
1220                                         htmlspecialchars( trim( $show ) ) . '</span>';
1221                 }
1222
1223                 return $str;
1224         }
1225
1226         /**
1227          * languages like Chinese need to be segmented in order for the diff
1228          * to be of any use
1229          *
1230          * @param string $text
1231          * @return string
1232          */
1233         function segmentForDiff( $text ) {
1234                 return $text;
1235         }
1236
1237         /**
1238          * and unsegment to show the result
1239          *
1240          * @param string $text
1241          * @return string
1242          */
1243         function unsegmentForDiff( $text ) {
1244                 return $text;
1245         }
1246
1247         # convert text to different variants of a language.
1248         function convert( $text, $isTitle = false) {
1249                 return $this->mConverter->convert($text, $isTitle);
1250         }
1251
1252         # Convert text from within Parser
1253         function parserConvert( $text, &$parser ) {
1254                 return $this->mConverter->parserConvert( $text, $parser );
1255         }
1256
1257         # Tell the converter that it shouldn't convert titles
1258         function setNoTitleConvert(){
1259                 $this->mConverter->setNotitleConvert();
1260         }
1261
1262         # Check if this is a language with variants
1263         function hasVariants(){
1264                 return sizeof($this->getVariants())>1;
1265         }
1266
1267
1268         /**
1269          * Perform output conversion on a string, and encode for safe HTML output.
1270          * @param string $text
1271          * @param bool $isTitle -- wtf?
1272          * @return string
1273          * @todo this should get integrated somewhere sane
1274          */
1275         function convertHtml( $text, $isTitle = false ) {
1276                 return htmlspecialchars( $this->convert( $text, $isTitle ) );
1277         }
1278
1279         function convertCategoryKey( $key ) {
1280                 return $this->mConverter->convertCategoryKey( $key );
1281         }
1282
1283         /**
1284          * get the list of variants supported by this langauge
1285          * see sample implementation in LanguageZh.php
1286          *
1287          * @return array an array of language codes
1288          */
1289         function getVariants() {
1290                 return $this->mConverter->getVariants();
1291         }
1292
1293
1294         function getPreferredVariant( $fromUser = true ) {
1295                 return $this->mConverter->getPreferredVariant( $fromUser );
1296         }
1297
1298         /**
1299          * if a language supports multiple variants, it is
1300          * possible that non-existing link in one variant
1301          * actually exists in another variant. this function
1302          * tries to find it. See e.g. LanguageZh.php
1303          *
1304          * @param string $link the name of the link
1305          * @param mixed $nt the title object of the link
1306          * @return null the input parameters may be modified upon return
1307          */
1308         function findVariantLink( &$link, &$nt ) {
1309                 $this->mConverter->findVariantLink($link, $nt);
1310         }
1311
1312         /**
1313          * If a language supports multiple variants, converts text
1314          * into an array of all possible variants of the text:
1315          *  'variant' => text in that variant
1316          */
1317
1318         function convertLinkToAllVariants($text){
1319                 return $this->mConverter->convertLinkToAllVariants($text);
1320         }
1321
1322
1323         /**
1324          * returns language specific options used by User::getPageRenderHash()
1325          * for example, the preferred language variant
1326          *
1327          * @return string
1328          * @public
1329          */
1330         function getExtraHashOptions() {
1331                 return $this->mConverter->getExtraHashOptions();
1332         }
1333
1334         /**
1335          * for languages that support multiple variants, the title of an
1336          * article may be displayed differently in different variants. this
1337          * function returns the apporiate title defined in the body of the article.
1338          *
1339          * @return string
1340          */
1341         function getParsedTitle() {
1342                 return $this->mConverter->getParsedTitle();
1343         }
1344
1345         /**
1346          * Enclose a string with the "no conversion" tag. This is used by
1347          * various functions in the Parser
1348          *
1349          * @param string $text text to be tagged for no conversion
1350          * @return string the tagged text
1351         */
1352         function markNoConversion( $text, $noParse=false ) {
1353                 return $this->mConverter->markNoConversion( $text, $noParse );
1354         }
1355
1356         /**
1357          * A regular expression to match legal word-trailing characters
1358          * which should be merged onto a link of the form [[foo]]bar.
1359          *
1360          * @return string
1361          * @public
1362          */
1363         function linkTrail() {
1364                 $this->load();
1365                 return $this->linkTrail;
1366         }
1367
1368         function getLangObj() {
1369                 return $this;
1370         }
1371
1372         /**
1373          * Get the RFC 3066 code for this language object
1374          */
1375         function getCode() {
1376                 return $this->mCode;
1377         }
1378
1379         function setCode( $code ) {
1380                 $this->mCode = $code;
1381         }
1382
1383         static function getFileName( $prefix = 'Language', $code, $suffix = '.php' ) {
1384                 return $prefix . str_replace( '-', '_', ucfirst( $code ) ) . $suffix;
1385         }
1386
1387         static function getLocalisationArray( $code, $disableCache = false ) {
1388                 self::loadLocalisation( $code, $disableCache );
1389                 return self::$mLocalisationCache[$code];
1390         }
1391
1392         /**
1393          * Load localisation data for a given code into the static cache
1394          *
1395          * @return array Dependencies, map of filenames to mtimes
1396          */
1397         static function loadLocalisation( $code, $disableCache = false ) {
1398                 static $recursionGuard = array();
1399                 global $wgMemc, $wgDBname, $IP;
1400
1401                 if ( !$code ) {
1402                         throw new MWException( "Invalid language code requested" );
1403                 }
1404
1405                 if ( !$disableCache ) {
1406                         # Try the per-process cache
1407                         if ( isset( self::$mLocalisationCache[$code] ) ) {
1408                                 return self::$mLocalisationCache[$code]['deps'];
1409                         }
1410
1411                         wfProfileIn( __METHOD__ );
1412
1413                         # Try the serialized directory
1414                         $cache = wfGetPrecompiledData( self::getFileName( "Messages", $code, '.ser' ) );
1415                         if ( $cache ) {
1416                                 self::$mLocalisationCache[$code] = $cache;
1417                                 wfDebug( "Got localisation for $code from precompiled data file\n" );
1418                                 wfProfileOut( __METHOD__ );
1419                                 return self::$mLocalisationCache[$code]['deps'];
1420                         }
1421
1422                         # Try the global cache
1423                         $memcKey = "$wgDBname:localisation:$code";
1424                         $cache = $wgMemc->get( $memcKey );
1425                         if ( $cache ) {
1426                                 $expired = false;
1427                                 # Check file modification times
1428                                 foreach ( $cache['deps'] as $file => $mtime ) {
1429                                         if ( filemtime( $file ) > $mtime ) {
1430                                                 $expired = true;
1431                                                 break;
1432                                         }
1433                                 }
1434                                 if ( self::isLocalisationOutOfDate( $cache ) ) {
1435                                         $wgMemc->delete( $memcKey );
1436                                         $cache = false;
1437                                         wfDebug( "Localisation cache for $code had expired due to update of $file\n" );
1438                                 } else {
1439                                         self::$mLocalisationCache[$code] = $cache;
1440                                         wfDebug( "Got localisation for $code from cache\n" );
1441                                         wfProfileOut( __METHOD__ );
1442                                         return $cache['deps'];
1443                                 }
1444                         }
1445                 } else {
1446                         wfProfileIn( __METHOD__ );
1447                 }
1448
1449                 if ( $code != 'en' ) {
1450                         $fallback = 'en';
1451                 } else {
1452                         $fallback = false;
1453                 }
1454
1455                 # Load the primary localisation from the source file
1456                 global $IP;
1457                 $filename = self::getFileName( "$IP/languages/Messages", $code, '.php' );
1458                 if ( !file_exists( $filename ) ) {
1459                         wfDebug( "No localisation file for $code, using implicit fallback to en\n" );
1460                         $cache = array();
1461                         $deps = array();
1462                 } else {
1463                         $deps = array( $filename => filemtime( $filename ) );
1464                         require( $filename );
1465                         $cache = compact( self::$mLocalisationKeys );
1466                         wfDebug( "Got localisation for $code from source\n" );
1467                 }
1468
1469                 if ( !empty( $fallback ) ) {
1470                         # Load the fallback localisation, with a circular reference guard
1471                         if ( isset( $recursionGuard[$code] ) ) {
1472                                 throw new MWException( "Error: Circular fallback reference in language code $code" );
1473                         }
1474                         $recursionGuard[$code] = true;
1475                         $newDeps = self::loadLocalisation( $fallback, $disableCache );
1476                         unset( $recursionGuard[$code] );
1477
1478                         $secondary = self::$mLocalisationCache[$fallback];
1479                         $deps = array_merge( $deps, $newDeps );
1480
1481                         # Merge the fallback localisation with the current localisation
1482                         foreach ( self::$mLocalisationKeys as $key ) {
1483                                 if ( isset( $cache[$key] ) ) {
1484                                         if ( isset( $secondary[$key] ) ) {
1485                                                 if ( in_array( $key, self::$mMergeableMapKeys ) ) {
1486                                                         $cache[$key] = $cache[$key] + $secondary[$key];
1487                                                 } elseif ( in_array( $key, self::$mMergeableListKeys ) ) {
1488                                                         $cache[$key] = array_merge( $secondary[$key], $cache[$key] );
1489                                                 }
1490                                         }
1491                                 } else {
1492                                         $cache[$key] = $secondary[$key];
1493                                 }
1494                         }
1495
1496                         # Merge bookstore lists if requested
1497                         if ( !empty( $cache['bookstoreList']['inherit'] ) ) {
1498                                 $cache['bookstoreList'] = array_merge( $cache['bookstoreList'], $secondary['bookstoreList'] );
1499                         }
1500                         if ( isset( $cache['bookstoreList']['inherit'] ) ) {
1501                                 unset( $cache['bookstoreList']['inherit'] );
1502                         }
1503                 }
1504
1505                 # Add dependencies to the cache entry
1506                 $cache['deps'] = $deps;
1507
1508                 # Replace spaces with underscores in namespace names
1509                 $cache['namespaceNames'] = str_replace( ' ', '_', $cache['namespaceNames'] );
1510
1511                 # Save to both caches
1512                 self::$mLocalisationCache[$code] = $cache;
1513                 if ( !$disableCache ) {
1514                         $wgMemc->set( $memcKey, $cache );
1515                 }
1516
1517                 wfProfileOut( __METHOD__ );
1518                 return $deps;
1519         }
1520
1521         /**
1522          * Test if a given localisation cache is out of date with respect to the
1523          * source Messages files. This is done automatically for the global cache
1524          * in $wgMemc, but is only done on certain occasions for the serialized
1525          * data file.
1526          *
1527          * @param $cache mixed Either a language code or a cache array
1528          */
1529         static function isLocalisationOutOfDate( $cache ) {
1530                 if ( !is_array( $cache ) ) {
1531                         self::loadLocalisation( $cache );
1532                         $cache = self::$mLocalisationCache[$cache];
1533                 }
1534                 $expired = false;
1535                 foreach ( $cache['deps'] as $file => $mtime ) {
1536                         if ( filemtime( $file ) > $mtime ) {
1537                                 $expired = true;
1538                                 break;
1539                         }
1540                 }
1541                 return $expired;
1542         }
1543
1544         /**
1545          * Get the fallback for a given language
1546          */
1547         static function getFallbackFor( $code ) {
1548                 self::loadLocalisation( $code );
1549                 return self::$mLocalisationCache[$code]['fallback'];
1550         }
1551
1552         /**
1553          * Get all messages for a given language
1554          */
1555         static function getMessagesFor( $code ) {
1556                 self::loadLocalisation( $code );
1557                 return self::$mLocalisationCache[$code]['messages'];
1558         }
1559
1560         /**
1561          * Get a message for a given language
1562          */
1563         static function getMessageFor( $key, $code ) {
1564                 self::loadLocalisation( $code );
1565                 return @self::$mLocalisationCache[$code]['messages'][$key];
1566         }
1567
1568         /**
1569          * Load localisation data for this object
1570          */
1571         function load() {
1572                 if ( !$this->mLoaded ) {
1573                         self::loadLocalisation( $this->getCode() );
1574                         $cache =& self::$mLocalisationCache[$this->getCode()];
1575                         foreach ( self::$mLocalisationKeys as $key ) {
1576                                 $this->$key = $cache[$key];
1577                         }
1578                         $this->mLoaded = true;
1579
1580                         $this->fixUpSettings();
1581                 }
1582         }
1583
1584         /**
1585          * Do any necessary post-cache-load settings adjustment
1586          */
1587         function fixUpSettings() {
1588                 global $wgExtraNamespaces, $wgMetaNamespace, $wgMetaNamespaceTalk, $wgMessageCache,
1589                         $wgNamespaceAliases, $wgAmericanDates;
1590                 wfProfileIn( __METHOD__ );
1591                 if ( $wgExtraNamespaces ) {
1592                         $this->namespaceNames = $wgExtraNamespaces + $this->namespaceNames;
1593                 }
1594
1595                 $this->namespaceNames[NS_PROJECT] = $wgMetaNamespace;
1596                 if ( $wgMetaNamespaceTalk ) {
1597                         $this->namespaceNames[NS_PROJECT_TALK] = $wgMetaNamespaceTalk;
1598                 } else {
1599                         $talk = $this->namespaceNames[NS_PROJECT_TALK];
1600                         $talk = str_replace( '$1', $wgMetaNamespace, $talk );
1601
1602                         # Allow grammar transformations
1603                         # Allowing full message-style parsing would make simple requests
1604                         # such as action=raw much more expensive than they need to be.
1605                         # This will hopefully cover most cases.
1606                         $talk = preg_replace_callback( '/{{grammar:(.*?)\|(.*?)}}/i',
1607                                 array( &$this, 'replaceGrammarInNamespace' ), $talk );
1608                         $talk = str_replace( ' ', '_', $talk );
1609                         $this->namespaceNames[NS_PROJECT_TALK] = $talk;
1610                 }
1611
1612                 # The above mixing may leave namespaces out of canonical order.
1613                 # Re-order by namespace ID number...
1614                 ksort( $this->namespaceNames );
1615
1616                 # Put namespace names and aliases into a hashtable.
1617                 # If this is too slow, then we should arrange it so that it is done
1618                 # before caching. The catch is that at pre-cache time, the above
1619                 # class-specific fixup hasn't been done.
1620                 $this->mNamespaceIds = array();
1621                 foreach ( $this->namespaceNames as $index => $name ) {
1622                         $this->mNamespaceIds[$this->lc($name)] = $index;
1623                 }
1624                 if ( $this->namespaceAliases ) {
1625                         foreach ( $this->namespaceAliases as $name => $index ) {
1626                                 $this->mNamespaceIds[$this->lc($name)] = $index;
1627                         }
1628                 }
1629                 if ( $wgNamespaceAliases ) {
1630                         foreach ( $wgNamespaceAliases as $name => $index ) {
1631                                 $this->mNamespaceIds[$this->lc($name)] = $index;
1632                         }
1633                 }
1634
1635                 if ( $this->defaultDateFormat == 'dmy or mdy' ) {
1636                         $this->defaultDateFormat = $wgAmericanDates ? 'mdy' : 'dmy';
1637                 }
1638                 wfProfileOut( __METHOD__ );
1639         }
1640
1641         function replaceGrammarInNamespace( $m ) {
1642                 return $this->convertGrammar( trim( $m[2] ), trim( $m[1] ) );
1643         }
1644
1645         static function getCaseMaps() {
1646                 static $wikiUpperChars, $wikiLowerChars;
1647                 global $IP;
1648                 if ( isset( $wikiUpperChars ) ) {
1649                         return array( $wikiUpperChars, $wikiLowerChars );
1650                 }
1651
1652                 wfProfileIn( __METHOD__ );
1653                 $arr = wfGetPrecompiledData( 'Utf8Case.ser' );
1654                 if ( $arr === false ) {
1655                         throw new MWException(
1656                                 "Utf8Case.ser is missing, please run \"make\" in the serialized directory\n" );
1657                 }
1658                 extract( $arr );
1659                 wfProfileOut( __METHOD__ );
1660                 return array( $wikiUpperChars, $wikiLowerChars );
1661         }
1662 }
1663
1664 ?>