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<?php /** * This file is part of the POMO package. * * @copyright 2014 POMO * @license GPL / namespace POMO\Translations; use POMO\Parser\PluralForms; /* * Class for a set of entries for translation and their associated headers. / class GettextTranslations extends Translations implements TranslationsInterface { /* * Number of plural forms. * * @var int / public $_nplurals; /* * Callback to retrieve the plural form. * * @var callable / public $_gettext_select_plural_form; /* * The gettext implementation of select_plural_form. * * It lives in this class, because there are more than one descendand, * which will use it and they can't share it effectively. * * @param int $count Items count * * @return mixed / public function gettext_select_plural_form($count) { if ( !isset($this->_gettext_select_plural_form) \|\| is_null($this->_gettext_select_plural_form) ) { list($nplurals, $expression) = $this->nplurals_and_expression_from_header($this->get_header('Plural-Forms')); $this->_nplurals = $nplurals; $this->_gettext_select_plural_form = $this->make_plural_form_function($nplurals, $expression); } return call_user_func($this->_gettext_select_plural_form, $count); } /* * @param $header * * @return array / public function nplurals_and_expression_from_header($header) { if (preg_match('/^\snplurals\s=\s(\d+)\s;\s+plural\s=\s(.+)$/', $header, $matches)) { $nplurals = (int) $matches[1]; $expression = trim($matches[2]); return array($nplurals, $expression); } else { return array(2, 'n != 1'); } } /* * Makes a function, which will return the right translation index, * according to the plural forms header. * * @param int $nplurals * @param string $expression * * @return callable The right translation index / public function make_plural_form_function($nplurals, $expression) { try { $handler = new PluralForms(rtrim($expression, ';')); return array($handler, 'get'); } catch (\Exception $e) { // Fall back to default plural-form function. return $this->make_plural_form_function(2, 'n != 1'); } } /* * Adds parentheses to the inner parts of ternary operators in * plural expressions, because PHP evaluates ternary operators * from left to right. * * @param string $expression the expression without parentheses * * @return string the expression with parentheses added / public function parenthesize_plural_exression($expression) { $expression .= ';'; $res = ''; $depth = 0; for ($i = 0; $i < strlen($expression); ++$i) { $char = $expression[$i]; switch ($char) { case '?': $res .= ' ? ('; $depth++; break; case ':': $res .= ') : ('; break; case ';': $res .= str_repeat(')', $depth) . ';'; $depth = 0; break; default: $res .= $char; } } return rtrim($res, ';'); } /* * @param string $translation * * @return array */ public function make_headers($translation) { $headers = array(); // sometimes \ns are used instead of real new lines $translation = str_replace('\n', "\n", $translation); $lines = explode("\n", $translation); foreach ($lines as $line) { $parts = explode(':', $line, 2); if (!isset($parts[1])) { continue; } $headers[trim($parts[0])] = trim($parts[1]); } return $headers; } public function set_header($header, $value) { parent::set_header($header, $value); if ('Plural-Forms' == $header) { list($nplurals, $expression) = $this->nplurals_and_expression_from_header($this->get_header('Plural-Forms')); $this->_nplurals = $nplurals; $this->_gettext_select_plural_form = $this->make_plural_form_function($nplurals, $expression); } } }

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