LanguageSr.php

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<?php
class SrConverter extends LanguageConverter {
    public $mToLatin = [
        'а' => 'a', 'б' => 'b', 'в' => 'v', 'г' => 'g', 'д' => 'd',
        'ђ' => 'đ', 'е' => 'e', 'ж' => 'ž', 'з' => 'z', 'и' => 'i',
        'ј' => 'j', 'к' => 'k', 'л' => 'l', 'љ' => 'lj', 'м' => 'm',
        'н' => 'n', 'њ' => 'nj', 'о' => 'o', 'п' => 'p', 'р' => 'r',
        'с' => 's', 'т' => 't', 'ћ' => 'ć', 'у' => 'u', 'ф' => 'f',
        'х' => 'h', 'ц' => 'c', 'ч' => 'č', 'џ' => 'dž', 'ш' => 'š',

        'А' => 'A', 'Б' => 'B', 'В' => 'V', 'Г' => 'G', 'Д' => 'D',
        'Ђ' => 'Đ', 'Е' => 'E', 'Ж' => 'Ž', 'З' => 'Z', 'И' => 'I',
        'Ј' => 'J', 'К' => 'K', 'Л' => 'L', 'Љ' => 'Lj', 'М' => 'M',
        'Н' => 'N', 'Њ' => 'Nj', 'О' => 'O', 'П' => 'P', 'Р' => 'R',
        'С' => 'S', 'Т' => 'T', 'Ћ' => 'Ć', 'У' => 'U', 'Ф' => 'F',
        'Х' => 'H', 'Ц' => 'C', 'Ч' => 'Č', 'Џ' => 'Dž', 'Ш' => 'Š',
    ];

    public $mToCyrillics = [
        'a' => 'а', 'b' => 'б', 'c' => 'ц', 'č' => 'ч', 'ć' => 'ћ',
        'd' => 'д', 'dž' => 'џ', 'đ' => 'ђ', 'e' => 'е', 'f' => 'ф',
        'g' => 'г', 'h' => 'х', 'i' => 'и', 'j' => 'ј', 'k' => 'к',
        'l' => 'л', 'lj' => 'љ', 'm' => 'м', 'n' => 'н', 'nj' => 'њ',
        'o' => 'о', 'p' => 'п', 'r' => 'р', 's' => 'с', 'š' => 'ш',
        't' => 'т', 'u' => 'у', 'v' => 'в', 'z' => 'з', 'ž' => 'ж',

        'A' => 'А', 'B' => 'Б', 'C' => 'Ц', 'Č' => 'Ч', 'Ć' => 'Ћ',
        'D' => 'Д', 'Dž' => 'Џ', 'Đ' => 'Ђ', 'E' => 'Е', 'F' => 'Ф',
        'G' => 'Г', 'H' => 'Х', 'I' => 'И', 'J' => 'Ј', 'K' => 'К',
        'L' => 'Л', 'LJ' => 'Љ', 'M' => 'М', 'N' => 'Н', 'NJ' => 'Њ',
        'O' => 'О', 'P' => 'П', 'R' => 'Р', 'S' => 'С', 'Š' => 'Ш',
        'T' => 'Т', 'U' => 'У', 'V' => 'В', 'Z' => 'З', 'Ž' => 'Ж',

        'DŽ' => 'Џ', 'd!ž' => 'дж', 'D!ž' => 'Дж', 'D!Ž' => 'ДЖ',
        'Lj' => 'Љ', 'l!j' => 'лј', 'L!j' => 'Лј', 'L!J' => 'ЛЈ',
        'Nj' => 'Њ', 'n!j' => 'нј', 'N!j' => 'Нј', 'N!J' => 'НЈ'
    ];

    function loadDefaultTables() {
        $this->mTables = [
            'sr-ec' => new ReplacementArray( $this->mToCyrillics ),
            'sr-el' => new ReplacementArray( $this->mToLatin ),
            'sr' => new ReplacementArray()
        ];
    }

    function parseManualRule( $rule, $flags = [] ) {
        if ( in_array( 'T', $flags ) ) {
            return parent::parseManualRule( $rule, $flags );
        }

        $carray = [];
        // otherwise ignore all formatting
        foreach ( $this->mVariants as $v ) {
            $carray[$v] = $rule;
        }

        return $carray;
    }

    function findVariantLink( &$link, &$nt, $ignoreOtherCond = false ) {
        // check for user namespace
        if ( is_object( $nt ) ) {
            $ns = $nt->getNamespace();
            if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
                return;
            }
        }

        $oldlink = $link;
        parent::findVariantLink( $link, $nt, $ignoreOtherCond );
        if ( $this->getPreferredVariant() == $this->mMainLanguageCode ) {
            $link = $oldlink;
        }
    }

    function translate( $text, $toVariant ) {
        $breaks = '[^\w\x80-\xff]';

        // regexp for roman numbers
        $roman = 'M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})';

        $reg = '/^' . $roman . '$|^' . $roman . $breaks . '|' . $breaks
            . $roman . '$|' . $breaks . $roman . $breaks . '/';

        $matches = preg_split( $reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE );

        $m = array_shift( $matches );
        $this->loadTables();
        if ( !isset( $this->mTables[$toVariant] ) ) {
            throw new MWException( "Broken variant table: "
                . implode( ',', array_keys( $this->mTables ) ) );
        }
        $ret = $this->mTables[$toVariant]->replace( $m[0] );
        $mstart = $m[1] + strlen( $m[0] );
        foreach ( $matches as $m ) {
            $ret .= substr( $text, $mstart, $m[1] -$mstart );
            $ret .= parent::translate( $m[0], $toVariant );
            $mstart = $m[1] + strlen( $m[0] );
        }

        return $ret;
    }

    public function guessVariant( $text, $variant ) {
        $numCyrillic = preg_match_all( "/[шђчћжШЂЧЋЖ]/u", $text, $dummy );
        $numLatin = preg_match_all( "/[šđč枊ĐČĆŽ]/u", $text, $dummy );

        if ( $variant == 'sr-ec' ) {
            return $numCyrillic > $numLatin;
        } elseif ( $variant == 'sr-el' ) {
            return $numLatin > $numCyrillic;
        } else {
            return false;
        }

    }

}

class LanguageSr extends Language {
    function __construct() {
        parent::__construct();

        $variants = [ 'sr', 'sr-ec', 'sr-el' ];
        $variantfallbacks = [
            'sr' => 'sr-ec',
            'sr-ec' => 'sr',
            'sr-el' => 'sr',
        ];

        $flags = [
            'S' => 'S', 'писмо' => 'S', 'pismo' => 'S',
            'W' => 'W', 'реч' => 'W', 'reč' => 'W', 'ријеч' => 'W', 'riječ' => 'W'
        ];
        $this->mConverter = new SrConverter( $this, 'sr', $variants, $variantfallbacks, $flags );
    }
}