lang = Language::factory( 'en' ); } function getSortKey( $string ) { return $this->lang->uc( $string ); } function getFirstLetter( $string ) { if ( $string[0] == "\0" ) { $string = substr( $string, 1 ); } return $this->lang->ucfirst( $this->lang->firstChar( $string ) ); } } /** * Collation class that's essentially a no-op. * * Does sorting based on binary value of the string. * Like how things were pre 1.17. */ class IdentityCollation extends Collation { function getSortKey( $string ) { return $string; } function getFirstLetter( $string ) { global $wgContLang; // Copied from UppercaseCollation. // I'm kind of unclear on when this could happen... if ( $string[0] == "\0" ) { $string = substr( $string, 1 ); } return $wgContLang->firstChar( $string ); } } class IcuCollation extends Collation { const FIRST_LETTER_VERSION = 2; /** @var Collator */ private $primaryCollator; /** @var Collator */ private $mainCollator; /** @var string */ private $locale; /** @var Language */ protected $digitTransformLanguage; /** @var array */ private $firstLetterData; /** * Unified CJK blocks. * * The same definition of a CJK block must be used for both Collation and * generateCollationData.php. These blocks are omitted from the first * letter data, as an optimisation measure and because the default UCA table * is pretty useless for sorting Chinese text anyway. Japanese and Korean * blocks are not included here, because they are smaller and more useful. */ private static $cjkBlocks = array( array( 0x2E80, 0x2EFF ), // CJK Radicals Supplement array( 0x2F00, 0x2FDF ), // Kangxi Radicals array( 0x2FF0, 0x2FFF ), // Ideographic Description Characters array( 0x3000, 0x303F ), // CJK Symbols and Punctuation array( 0x31C0, 0x31EF ), // CJK Strokes array( 0x3200, 0x32FF ), // Enclosed CJK Letters and Months array( 0x3300, 0x33FF ), // CJK Compatibility array( 0x3400, 0x4DBF ), // CJK Unified Ideographs Extension A array( 0x4E00, 0x9FFF ), // CJK Unified Ideographs array( 0xF900, 0xFAFF ), // CJK Compatibility Ideographs array( 0xFE30, 0xFE4F ), // CJK Compatibility Forms array( 0x20000, 0x2A6DF ), // CJK Unified Ideographs Extension B array( 0x2A700, 0x2B73F ), // CJK Unified Ideographs Extension C array( 0x2B740, 0x2B81F ), // CJK Unified Ideographs Extension D array( 0x2F800, 0x2FA1F ), // CJK Compatibility Ideographs Supplement ); /** * Additional characters (or character groups) to be considered separate * letters for given languages, or to be removed from the list of such * letters (denoted by keys starting with '-'). * * These are additions to (or subtractions from) the data stored in the * first-letters-root.ser file (which among others includes full basic latin, * cyrillic and greek alphabets). * * "Separate letter" is a letter that would have a separate heading/section * for it in a dictionary or a phone book in this language. This data isn't * used for sorting (the ICU library handles that), only for deciding which * characters (or character groups) to use as headings. * * Initially generated based on the primary level of Unicode collation * tailorings available at http://developer.mimer.com/charts/tailorings.htm , * later modified. * * Empty arrays are intended; this signifies that the data for the language is * available and that there are, in fact, no additional letters to consider. */ private static $tailoringFirstLetters = array( // Verified by native speakers 'be' => array( "Ё" ), 'be-tarask' => array( "Ё" ), 'cy' => array( "Ch", "Dd", "Ff", "Ng", "Ll", "Ph", "Rh", "Th" ), 'en' => array(), 'fa' => array( "آ", "ء", "ه" ), 'fi' => array( "Å", "Ä", "Ö" ), 'fr' => array(), 'hu' => array( "Cs", "Dz", "Dzs", "Gy", "Ly", "Ny", "Ö", "Sz", "Ty", "Ü", "Zs" ), 'is' => array( "Á", "Ð", "É", "Í", "Ó", "Ú", "Ý", "Þ", "Æ", "Ö", "Å" ), 'it' => array(), 'lv' => array( "Č", "Ģ", "Ķ", "Ļ", "Ņ", "Š", "Ž" ), 'pl' => array( "Ą", "Ć", "Ę", "Ł", "Ń", "Ó", "Ś", "Ź", "Ż" ), 'pt' => array(), 'ru' => array(), 'sv' => array( "Å", "Ä", "Ö" ), 'sv@collation=standard' => array( "Å", "Ä", "Ö" ), 'uk' => array( "Ґ", "Ь" ), 'vi' => array( "Ă", "Â", "Đ", "Ê", "Ô", "Ơ", "Ư" ), // Not verified, but likely correct 'af' => array(), 'ast' => array( "Ch", "Ll", "Ñ" ), 'az' => array( "Ç", "Ə", "Ğ", "İ", "Ö", "Ş", "Ü" ), 'bg' => array(), 'br' => array( "Ch", "C'h" ), 'bs' => array( "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ), 'ca' => array(), 'co' => array(), 'cs' => array( "Č", "Ch", "Ř", "Š", "Ž" ), 'da' => array( "Æ", "Ø", "Å" ), 'de' => array(), 'dsb' => array( "Č", "Ć", "Dź", "Ě", "Ch", "Ł", "Ń", "Ŕ", "Š", "Ś", "Ž", "Ź" ), 'el' => array(), 'eo' => array( "Ĉ", "Ĝ", "Ĥ", "Ĵ", "Ŝ", "Ŭ" ), 'es' => array( "Ñ" ), 'et' => array( "Š", "Ž", "Õ", "Ä", "Ö", "Ü", "W" ), // added W for CollationEt (xx-uca-et) 'eu' => array( "Ñ" ), 'fo' => array( "Á", "Ð", "Í", "Ó", "Ú", "Ý", "Æ", "Ø", "Å" ), 'fur' => array( "À", "Á", "Â", "È", "Ì", "Ò", "Ù" ), 'fy' => array(), 'ga' => array(), 'gd' => array(), 'gl' => array( "Ch", "Ll", "Ñ" ), 'hr' => array( "Č", "Ć", "Dž", "Đ", "Lj", "Nj", "Š", "Ž" ), 'hsb' => array( "Č", "Dź", "Ě", "Ch", "Ł", "Ń", "Ř", "Š", "Ć", "Ž" ), 'kk' => array( "Ү", "І" ), 'kl' => array( "Æ", "Ø", "Å" ), 'ku' => array( "Ç", "Ê", "Î", "Ş", "Û" ), 'ky' => array( "Ё" ), 'la' => array(), 'lb' => array(), 'lt' => array( "Č", "Š", "Ž" ), 'mk' => array(), 'mo' => array( "Ă", "Â", "Î", "Ş", "Ţ" ), 'mt' => array( "Ċ", "Ġ", "Għ", "Ħ", "Ż" ), 'nl' => array(), 'no' => array( "Æ", "Ø", "Å" ), 'oc' => array(), 'rm' => array(), 'ro' => array( "Ă", "Â", "Î", "Ş", "Ţ" ), 'rup' => array( "Ă", "Â", "Î", "Ľ", "Ń", "Ş", "Ţ" ), 'sco' => array(), 'sk' => array( "Ä", "Č", "Ch", "Ô", "Š", "Ž" ), 'sl' => array( "Č", "Š", "Ž" ), 'smn' => array( "Á", "Č", "Đ", "Ŋ", "Š", "Ŧ", "Ž", "Æ", "Ø", "Å", "Ä", "Ö" ), 'sq' => array( "Ç", "Dh", "Ë", "Gj", "Ll", "Nj", "Rr", "Sh", "Th", "Xh", "Zh" ), 'sr' => array(), 'tk' => array( "Ç", "Ä", "Ž", "Ň", "Ö", "Ş", "Ü", "Ý" ), 'tl' => array( "Ñ", "Ng" ), 'tr' => array( "Ç", "Ğ", "İ", "Ö", "Ş", "Ü" ), 'tt' => array( "Ә", "Ө", "Ү", "Җ", "Ң", "Һ" ), 'uz' => array( "Ch", "G'", "Ng", "O'", "Sh" ), ); const RECORD_LENGTH = 14; function __construct( $locale ) { if ( !extension_loaded( 'intl' ) ) { throw new MWException( 'An ICU collation was requested, ' . 'but the intl extension is not available.' ); } $this->locale = $locale; // Drop everything after the '@' in locale's name $localeParts = explode( '@', $locale ); $this->digitTransformLanguage = Language::factory( $locale === 'root' ? 'en' : $localeParts[0] ); $this->mainCollator = Collator::create( $locale ); if ( !$this->mainCollator ) { throw new MWException( "Invalid ICU locale specified for collation: $locale" ); } $this->primaryCollator = Collator::create( $locale ); $this->primaryCollator->setStrength( Collator::PRIMARY ); } function getSortKey( $string ) { // intl extension produces non null-terminated // strings. Appending '' fixes it so that it doesn't generate // a warning on each access in debug php. wfSuppressWarnings(); $key = $this->mainCollator->getSortKey( $string ) . ''; wfRestoreWarnings(); return $key; } function getPrimarySortKey( $string ) { wfSuppressWarnings(); $key = $this->primaryCollator->getSortKey( $string ) . ''; wfRestoreWarnings(); return $key; } function getFirstLetter( $string ) { $string = strval( $string ); if ( $string === '' ) { return ''; } // Check for CJK $firstChar = mb_substr( $string, 0, 1, 'UTF-8' ); if ( ord( $firstChar ) > 0x7f && self::isCjk( utf8ToCodepoint( $firstChar ) ) ) { return $firstChar; } $sortKey = $this->getPrimarySortKey( $string ); // Do a binary search to find the correct letter to sort under $min = ArrayUtils::findLowerBound( array( $this, 'getSortKeyByLetterIndex' ), $this->getFirstLetterCount(), 'strcmp', $sortKey ); if ( $min === false ) { // Before the first letter return ''; } return $this->getLetterByIndex( $min ); } function getFirstLetterData() { if ( $this->firstLetterData !== null ) { return $this->firstLetterData; } $cache = wfGetCache( CACHE_ANYTHING ); $cacheKey = wfMemcKey( 'first-letters', $this->locale, $this->digitTransformLanguage->getCode(), self::getICUVersion() ); $cacheEntry = $cache->get( $cacheKey ); if ( $cacheEntry && isset( $cacheEntry['version'] ) && $cacheEntry['version'] == self::FIRST_LETTER_VERSION ) { $this->firstLetterData = $cacheEntry; return $this->firstLetterData; } // Generate data from serialized data file if ( isset( self::$tailoringFirstLetters[$this->locale] ) ) { $letters = wfGetPrecompiledData( "first-letters-root.ser" ); // Append additional characters $letters = array_merge( $letters, self::$tailoringFirstLetters[$this->locale] ); // Remove unnecessary ones, if any if ( isset( self::$tailoringFirstLetters['-' . $this->locale] ) ) { $letters = array_diff( $letters, self::$tailoringFirstLetters['-' . $this->locale] ); } // Apply digit transforms $digits = array( '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' ); $letters = array_diff( $letters, $digits ); foreach ( $digits as $digit ) { $letters[] = $this->digitTransformLanguage->formatNum( $digit, true ); } } else { $letters = wfGetPrecompiledData( "first-letters-{$this->locale}.ser" ); if ( $letters === false ) { throw new MWException( "MediaWiki does not support ICU locale " . "\"{$this->locale}\"" ); } } // Sort the letters. // // It's impossible to have the precompiled data file properly sorted, // because the sort order changes depending on ICU version. If the // array is not properly sorted, the binary search will return random // results. // // We also take this opportunity to remove primary collisions. $letterMap = array(); foreach ( $letters as $letter ) { $key = $this->getPrimarySortKey( $letter ); if ( isset( $letterMap[$key] ) ) { // Primary collision // Keep whichever one sorts first in the main collator if ( $this->mainCollator->compare( $letter, $letterMap[$key] ) < 0 ) { $letterMap[$key] = $letter; } } else { $letterMap[$key] = $letter; } } ksort( $letterMap, SORT_STRING ); // Remove duplicate prefixes. Basically if something has a sortkey // which is a prefix of some other sortkey, then it is an // expansion and probably should not be considered a section // header. // // For example 'þ' is sometimes sorted as if it is the letters // 'th'. Other times it is its own primary element. Another // example is '₨'. Sometimes its a currency symbol. Sometimes it // is an 'R' followed by an 's'. // // Additionally an expanded element should always sort directly // after its first element due to they way sortkeys work. // // UCA sortkey elements are of variable length but no collation // element should be a prefix of some other element, so I think // this is safe. See: // * https://ssl.icu-project.org/repos/icu/icuhtml/trunk/design/collation/ICU_collation_design.htm // * http://site.icu-project.org/design/collation/uca-weight-allocation // // Additionally, there is something called primary compression to // worry about. Basically, if you have two primary elements that // are more than one byte and both start with the same byte then // the first byte is dropped on the second primary. Additionally // either \x03 or \xFF may be added to mean that the next primary // does not start with the first byte of the first primary. // // This shouldn't matter much, as the first primary is not // changed, and that is what we are comparing against. // // tl;dr: This makes some assumptions about how icu implements // collations. It seems incredibly unlikely these assumptions // will change, but nonetheless they are assumptions. $prev = false; $duplicatePrefixes = array(); foreach ( $letterMap as $key => $value ) { // Remove terminator byte. Otherwise the prefix // comparison will get hung up on that. $trimmedKey = rtrim( $key, "\0" ); if ( $prev === false || $prev === '' ) { $prev = $trimmedKey; // We don't yet have a collation element // to compare against, so continue. continue; } // Due to the fact the array is sorted, we only have // to compare with the element directly previous // to the current element (skipping expansions). // An element "X" will always sort directly // before "XZ" (Unless we have "XY", but we // do not update $prev in that case). if ( substr( $trimmedKey, 0, strlen( $prev ) ) === $prev ) { $duplicatePrefixes[] = $key; // If this is an expansion, we don't want to // compare the next element to this element, // but to what is currently $prev continue; } $prev = $trimmedKey; } foreach ( $duplicatePrefixes as $badKey ) { wfDebug( "Removing '{$letterMap[$badKey]}' from first letters.\n" ); unset( $letterMap[$badKey] ); // This code assumes that unsetting does not change sort order. } $data = array( 'chars' => array_values( $letterMap ), 'keys' => array_keys( $letterMap ), 'version' => self::FIRST_LETTER_VERSION, ); // Reduce memory usage before caching unset( $letterMap ); // Save to cache $this->firstLetterData = $data; $cache->set( $cacheKey, $data, 86400 * 7 /* 1 week */ ); return $data; } function getLetterByIndex( $index ) { if ( $this->firstLetterData === null ) { $this->getFirstLetterData(); } return $this->firstLetterData['chars'][$index]; } function getSortKeyByLetterIndex( $index ) { if ( $this->firstLetterData === null ) { $this->getFirstLetterData(); } return $this->firstLetterData['keys'][$index]; } function getFirstLetterCount() { if ( $this->firstLetterData === null ) { $this->getFirstLetterData(); } return count( $this->firstLetterData['chars'] ); } static function isCjk( $codepoint ) { foreach ( self::$cjkBlocks as $block ) { if ( $codepoint >= $block[0] && $codepoint <= $block[1] ) { return true; } } return false; } /** * Return the version of ICU library used by PHP's intl extension, * or false when the extension is not installed of the version * can't be determined. * * The constant INTL_ICU_VERSION this function refers to isn't really * documented. It is available since PHP 5.3.7 (see PHP bug 54561). * This function will return false on older PHPs. * * @since 1.21 * @return string|bool */ static function getICUVersion() { return defined( 'INTL_ICU_VERSION' ) ? INTL_ICU_VERSION : false; } /** * Return the version of Unicode appropriate for the version of ICU library * currently in use, or false when it can't be determined. * * @since 1.21 * @return string|bool */ static function getUnicodeVersionForICU() { $icuVersion = IcuCollation::getICUVersion(); if ( !$icuVersion ) { return false; } $versionPrefix = substr( $icuVersion, 0, 3 ); // Source: http://site.icu-project.org/download $map = array( '50.' => '6.2', '49.' => '6.1', '4.8' => '6.0', '4.6' => '6.0', '4.4' => '5.2', '4.2' => '5.1', '4.0' => '5.1', '3.8' => '5.0', '3.6' => '5.0', '3.4' => '4.1', ); if ( isset( $map[$versionPrefix] ) ) { return $map[$versionPrefix]; } else { return false; } } } /** * Workaround for the lack of support of Sorani Kurdish / Central Kurdish language ('ckb') in ICU. * * Uses the same collation rules as Persian / Farsi ('fa'), but different characters for digits. */ class CollationCkb extends IcuCollation { function __construct() { // This will set $locale and collators, which affect the actual sorting order parent::__construct( 'fa' ); // Override the 'fa' language set by parent constructor, which affects #getFirstLetterData() $this->digitTransformLanguage = Language::factory( 'ckb' ); } } /** * Workaround for incorrect collation of Estonian language ('et') in ICU (bug 54168). * * 'W' and 'V' should not be considered the same letter for the purposes of collation in modern * Estonian. We work around this by replacing 'W' and 'w' with 'ᴡ' U+1D21 'LATIN LETTER SMALL * CAPITAL W' for sortkey generation, which is collated like 'W' and is not tailored to have the * same primary weight as 'V' in Estonian. */ class CollationEt extends IcuCollation { function __construct() { parent::__construct( 'et' ); } private static function mangle( $string ) { return str_replace( array( 'w', 'W' ), 'ᴡ', // U+1D21 'LATIN LETTER SMALL CAPITAL W' $string ); } private static function unmangle( $string ) { // Casing data is lost… return str_replace( 'ᴡ', // U+1D21 'LATIN LETTER SMALL CAPITAL W' 'W', $string ); } function getSortKey( $string ) { return parent::getSortKey( self::mangle( $string ) ); } function getFirstLetter( $string ) { return self::unmangle( parent::getFirstLetter( self::mangle( $string ) ) ); } }