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<?php namespace Nextend\Framework\Localization\Joomla\Pomo; class Gettext_Translations extends Translations { /** * 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 $count */ function gettext_select_plural_form($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 string $header * * @return array */ function nplurals_and_expression_from_header($header) { if (preg_match('/^\s*nplurals\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 $expression */ function make_plural_form_function($nplurals, $expression) { try { $handler = new Plural_Forms(rtrim($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 oerators from left to right * * @param string $expression the expression without parentheses * * @return string the expression with parentheses added */ function parenthesize_plural_exression($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 $translation * * @return array */ function make_headers($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; } /** * @param string $header * @param string $value */ function set_header($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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