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* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Translation\Loader; /** * @copyright Copyright (c) 2010, Union of RAD https://github.com/UnionOfRAD/lithium * @copyright Copyright (c) 2012, Clemens Tolboom */ class PoFileLoader extends FileLoader { /** * Parses portable object (PO) format. * * From https://www.gnu.org/software/gettext/manual/gettext.html#PO-Files * we should be able to parse files having: * * white-space * # translator-comments * #. extracted-comments * #: reference... * #, flag... * #| msgid previous-untranslated-string * msgid untranslated-string * msgstr translated-string * * extra or different lines are: * * #| msgctxt previous-context * #| msgid previous-untranslated-string * msgctxt context * * #| msgid previous-untranslated-string-singular * #| msgid_plural previous-untranslated-string-plural * msgid untranslated-string-singular * msgid_plural untranslated-string-plural * msgstr[0] translated-string-case-0 * ... * msgstr[N] translated-string-case-n * * The definition states: * - white-space and comments are optional. * - msgid "" that an empty singleline defines a header. * * This parser sacrifices some features of the reference implementation the * differences to that implementation are as follows. * - No support for comments spanning multiple lines. * - Translator and extracted comments are treated as being the same type. * - Message IDs are allowed to have other encodings as just US-ASCII. * * Items with an empty id are ignored. * * {@inheritdoc} */ protected function loadResource(string $resource) { $stream = fopen($resource, 'r'); $defaults = [ 'ids' => [], 'translated' => null, ]; $messages = []; $item = $defaults; $flags = []; while ($line = fgets($stream)) { $line = trim($line); if ('' === $line) { // Whitespace indicated current item is done if (!\in_array('fuzzy', $flags)) { $this->addMessage($messages, $item); } $item = $defaults; $flags = []; } elseif ('#,' === substr($line, 0, 2)) { $flags = array_map('trim', explode(',', substr($line, 2))); } elseif ('msgid "' === substr($line, 0, 7)) { // We start a new msg so save previous // TODO: this fails when comments or contexts are added $this->addMessage($messages, $item); $item = $defaults; $item['ids']['singular'] = substr($line, 7, -1); } elseif ('msgstr "' === substr($line, 0, 8)) { $item['translated'] = substr($line, 8, -1); } elseif ('"' === $line[0]) { $continues = isset($item['translated']) ? 'translated' : 'ids'; if (\is_array($item[$continues])) { end($item[$continues]); $item[$continues][key($item[$continues])] .= substr($line, 1, -1); } else { $item[$continues] .= substr($line, 1, -1); } } elseif ('msgid_plural "' === substr($line, 0, 14)) { $item['ids']['plural'] = substr($line, 14, -1); } elseif ('msgstr[' === substr($line, 0, 7)) { $size = strpos($line, ']'); $item['translated'][(int) substr($line, 7, 1)] = substr($line, $size + 3, -1); } } // save last item if (!\in_array('fuzzy', $flags)) { $this->addMessage($messages, $item); } fclose($stream); return $messages; } /** * Save a translation item to the messages. * * A .po file could contain by error missing plural indexes. We need to * fix these before saving them. */ private function addMessage(array &$messages, array $item) { if (!empty($item['ids']['singular'])) { $id = stripcslashes($item['ids']['singular']); if (isset($item['ids']['plural'])) { $id .= '|'.stripcslashes($item['ids']['plural']); } $translated = (array) $item['translated']; // PO are by definition indexed so sort by index. ksort($translated); // Make sure every index is filled. end($translated); $count = key($translated); // Fill missing spots with '-'. $empties = array_fill(0, $count + 1, '-'); $translated += $empties; ksort($translated); $messages[$id] = stripcslashes(implode('|', $translated)); } } }