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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ use MediaWiki\Language\Language; use MediaWiki\Languages\LanguageFactory; /** * Collation that orders text with numbers "naturally", so that 'Foo 1' < 'Foo 2' < 'Foo 12'. * * Note that this only works in terms of sequences of digits, and the behavior for decimal fractions * or pretty-formatted numbers may be unexpected. * * Digits will be based on the wiki's content language settings. If * you change the content language of a wiki you will need to run * updateCollation.php --force. Only English (ASCII 0-9) and the * localized version will be counted. Localized digits from other languages * or weird unicode digit equivalents (e.g. ４, 𝟜, ⓸ , ⁴, etc) will not count. * * @since 1.28 */ class NumericUppercaseCollation extends UppercaseCollation { /** * @var Language How to convert digits (usually the content language) */ private $digitTransformLang; /** * @param LanguageFactory $languageFactory * @param string|Language $digitTransformLang How to convert digits. * For example, if given language "my" than ၇ is treated like 7. * It is expected that usually this is given the content language. */ public function __construct( LanguageFactory $languageFactory, $digitTransformLang ) { $this->digitTransformLang = $digitTransformLang instanceof Language ? $digitTransformLang : $languageFactory->getLanguage( $digitTransformLang ); parent::__construct( $languageFactory ); } public function getSortKey( $string ) { $sortkey = parent::getSortKey( $string ); $sortkey = $this->convertDigits( $sortkey ); // For each sequence of digits, insert the digit '0' and then the length of the sequence // (encoded in two bytes) before it. That's all folks, it sorts correctly now! The '0' ensures // correct position (where digits would normally sort), then the length will be compared putting // shorter numbers before longer ones; if identical, then the characters will be compared, which // generates the correct results for numbers of equal length. $sortkey = preg_replace_callback( '/\d+/', static function ( $matches ) { // Strip any leading zeros $number = ltrim( $matches[0], '0' ); $len = strlen( $number ); // This allows sequences of up to 65536 numeric characters to be handled correctly. One byte // would allow only for 256, which doesn't feel future-proof. $prefix = chr( (int)floor( $len / 256 ) ) . chr( $len % 256 ); return '0' . $prefix . $number; }, $sortkey ); return $sortkey; } /** * Convert localized digits to english digits. * * based on Language::parseFormattedNumber but without commas. * * @param string $string sortkey to unlocalize digits of * @return string Sortkey with all localized digits replaced with ASCII digits. */ private function convertDigits( $string ) { $table = $this->digitTransformLang->digitTransformTable(); if ( $table ) { $table = array_filter( $table ); $flipped = array_flip( $table ); // Some languages seem to also have commas in this table. $flipped = array_filter( $flipped, 'is_numeric' ); $string = strtr( $string, $flipped ); } return $string; } public function getFirstLetter( $string ) { $convertedString = $this->convertDigits( $string ); if ( preg_match( '/^\d/', $convertedString ) ) { return wfMessage( 'category-header-numerals' ) ->numParams( 0, 9 ) ->text(); } else { return parent::getFirstLetter( $string ); } } }
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