Drupal investigation

PoFileLoader.php 5.3KB

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  1. <?php
  2. /*
  3. * This file is part of the Symfony package.
  4. *
  5. * (c) Fabien Potencier <fabien@symfony.com>
  6. *
  7. * For the full copyright and license information, please view the LICENSE
  8. * file that was distributed with this source code.
  9. */
  10. namespace Symfony\Component\Translation\Loader;
  11. /**
  12. * @copyright Copyright (c) 2010, Union of RAD http://union-of-rad.org (http://lithify.me/)
  13. * @copyright Copyright (c) 2012, Clemens Tolboom
  14. */
  15. class PoFileLoader extends FileLoader
  16. {
  17. /**
  18. * Parses portable object (PO) format.
  19. *
  20. * From http://www.gnu.org/software/gettext/manual/gettext.html#PO-Files
  21. * we should be able to parse files having:
  22. *
  23. * white-space
  24. * # translator-comments
  25. * #. extracted-comments
  26. * #: reference...
  27. * #, flag...
  28. * #| msgid previous-untranslated-string
  29. * msgid untranslated-string
  30. * msgstr translated-string
  31. *
  32. * extra or different lines are:
  33. *
  34. * #| msgctxt previous-context
  35. * #| msgid previous-untranslated-string
  36. * msgctxt context
  37. *
  38. * #| msgid previous-untranslated-string-singular
  39. * #| msgid_plural previous-untranslated-string-plural
  40. * msgid untranslated-string-singular
  41. * msgid_plural untranslated-string-plural
  42. * msgstr[0] translated-string-case-0
  43. * ...
  44. * msgstr[N] translated-string-case-n
  45. *
  46. * The definition states:
  47. * - white-space and comments are optional.
  48. * - msgid "" that an empty singleline defines a header.
  49. *
  50. * This parser sacrifices some features of the reference implementation the
  51. * differences to that implementation are as follows.
  52. * - No support for comments spanning multiple lines.
  53. * - Translator and extracted comments are treated as being the same type.
  54. * - Message IDs are allowed to have other encodings as just US-ASCII.
  55. *
  56. * Items with an empty id are ignored.
  57. *
  58. * {@inheritdoc}
  59. */
  60. protected function loadResource($resource)
  61. {
  62. $stream = fopen($resource, 'r');
  63. $defaults = array(
  64. 'ids' => array(),
  65. 'translated' => null,
  66. );
  67. $messages = array();
  68. $item = $defaults;
  69. $flags = array();
  70. while ($line = fgets($stream)) {
  71. $line = trim($line);
  72. if ($line === '') {
  73. // Whitespace indicated current item is done
  74. if (!in_array('fuzzy', $flags)) {
  75. $this->addMessage($messages, $item);
  76. }
  77. $item = $defaults;
  78. $flags = array();
  79. } elseif (substr($line, 0, 2) === '#,') {
  80. $flags = array_map('trim', explode(',', substr($line, 2)));
  81. } elseif (substr($line, 0, 7) === 'msgid "') {
  82. // We start a new msg so save previous
  83. // TODO: this fails when comments or contexts are added
  84. $this->addMessage($messages, $item);
  85. $item = $defaults;
  86. $item['ids']['singular'] = substr($line, 7, -1);
  87. } elseif (substr($line, 0, 8) === 'msgstr "') {
  88. $item['translated'] = substr($line, 8, -1);
  89. } elseif ($line[0] === '"') {
  90. $continues = isset($item['translated']) ? 'translated' : 'ids';
  91. if (is_array($item[$continues])) {
  92. end($item[$continues]);
  93. $item[$continues][key($item[$continues])] .= substr($line, 1, -1);
  94. } else {
  95. $item[$continues] .= substr($line, 1, -1);
  96. }
  97. } elseif (substr($line, 0, 14) === 'msgid_plural "') {
  98. $item['ids']['plural'] = substr($line, 14, -1);
  99. } elseif (substr($line, 0, 7) === 'msgstr[') {
  100. $size = strpos($line, ']');
  101. $item['translated'][(int) substr($line, 7, 1)] = substr($line, $size + 3, -1);
  102. }
  103. }
  104. // save last item
  105. if (!in_array('fuzzy', $flags)) {
  106. $this->addMessage($messages, $item);
  107. }
  108. fclose($stream);
  109. return $messages;
  110. }
  111. /**
  112. * Save a translation item to the messages.
  113. *
  114. * A .po file could contain by error missing plural indexes. We need to
  115. * fix these before saving them.
  116. *
  117. * @param array $messages
  118. * @param array $item
  119. */
  120. private function addMessage(array &$messages, array $item)
  121. {
  122. if (is_array($item['translated'])) {
  123. $messages[stripcslashes($item['ids']['singular'])] = stripcslashes($item['translated'][0]);
  124. if (isset($item['ids']['plural'])) {
  125. $plurals = $item['translated'];
  126. // PO are by definition indexed so sort by index.
  127. ksort($plurals);
  128. // Make sure every index is filled.
  129. end($plurals);
  130. $count = key($plurals);
  131. // Fill missing spots with '-'.
  132. $empties = array_fill(0, $count + 1, '-');
  133. $plurals += $empties;
  134. ksort($plurals);
  135. $messages[stripcslashes($item['ids']['plural'])] = stripcslashes(implode('|', $plurals));
  136. }
  137. } elseif (!empty($item['ids']['singular'])) {
  138. $messages[stripcslashes($item['ids']['singular'])] = stripcslashes($item['translated']);
  139. }
  140. }
  141. }