LanguageEo.php

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<?php
class LanguageEo extends Language {
    function iconv( $in, $out, $string ) {
        if ( strcasecmp( $in, 'x' ) == 0 && strcasecmp( $out, 'utf-8' ) == 0 ) {
            return preg_replace_callback (
                '/([cghjsu]x?)((?:xx)*)(?!x)/i',
                array( $this, 'strrtxuCallback' ), $string );
        } elseif ( strcasecmp( $in, 'UTF-8' ) == 0 && strcasecmp( $out, 'x' ) == 0 ) {
            # Double Xs only if they follow cxapelutaj literoj.
            return preg_replace_callback(
                '/((?:[cghjsu]|\xc4[\x88\x89\x9c\x9d\xa4\xa5\xb4\xb5]|\xc5[\x9c\x9d\xac\xad])x*)/i',
                array( $this, 'strrtuxCallback' ), $string );
        }
        return parent::iconv( $in, $out, $string );
    }

    function strrtuxCallback( $matches ) {
        static $ux = array(
            'x' => 'xx', 'X' => 'Xx',
            "\xc4\x88" => "Cx", "\xc4\x89" => "cx",
            "\xc4\x9c" => "Gx", "\xc4\x9d" => "gx",
            "\xc4\xa4" => "Hx", "\xc4\xa5" => "hx",
            "\xc4\xb4" => "Jx", "\xc4\xb5" => "jx",
            "\xc5\x9c" => "Sx", "\xc5\x9d" => "sx",
            "\xc5\xac" => "Ux", "\xc5\xad" => "ux",
        );
        return strtr( $matches[1], $ux );
    }

    function strrtxuCallback( $matches ) {
        static $xu = array(
            'xx' => 'x', 'xX' => 'x',
            'Xx' => 'X', 'XX' => 'X',
            "Cx" => "\xc4\x88", "CX" => "\xc4\x88",
            "cx" => "\xc4\x89", "cX" => "\xc4\x89",
            "Gx" => "\xc4\x9c", "GX" => "\xc4\x9c",
            "gx" => "\xc4\x9d", "gX" => "\xc4\x9d",
            "Hx" => "\xc4\xa4", "HX" => "\xc4\xa4",
            "hx" => "\xc4\xa5", "hX" => "\xc4\xa5",
            "Jx" => "\xc4\xb4", "JX" => "\xc4\xb4",
            "jx" => "\xc4\xb5", "jX" => "\xc4\xb5",
            "Sx" => "\xc5\x9c", "SX" => "\xc5\x9c",
            "sx" => "\xc5\x9d", "sX" => "\xc5\x9d",
            "Ux" => "\xc5\xac", "UX" => "\xc5\xac",
            "ux" => "\xc5\xad", "uX" => "\xc5\xad",
        );
        return strtr( $matches[1], $xu ) . strtr( $matches[2], $xu );
    }

    function initEncoding() {
        global $wgEditEncoding;
        $wgEditEncoding = 'x';
    }
}