Merge remote-tracking branch 'upstream/4.5' into 4.5-master-2015-02-09-11-44-07

[civicrm-core.git] / CRM / Utils / JS.php

<?php
/*
+--------------------------------------------------------------------+
| CiviCRM version 4.6                                                |
+--------------------------------------------------------------------+
| Copyright CiviCRM LLC (c) 2004-2014                                |
+--------------------------------------------------------------------+
| This file is a part of CiviCRM.                                    |
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| CiviCRM is free software; you can copy, modify, and distribute it  |
| under the terms of the GNU Affero General Public License           |
| Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
|                                                                    |
| CiviCRM is distributed in the hope that it will be useful, but     |
| WITHOUT ANY WARRANTY; without even the implied warranty of         |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
| See the GNU Affero General Public License for more details.        |
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| You should have received a copy of the GNU Affero General Public   |
| License and the CiviCRM Licensing Exception along                  |
| with this program; if not, contact CiviCRM LLC                     |
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 */

/**
 * Parse Javascript content and extract translatable strings.
 *
 * @package CRM
 * @copyright CiviCRM LLC (c) 2004-2014
 * $Id$
 *
 */
class CRM_Utils_JS {
  /**
   * Parse a javascript file for translatable strings.
   *
   * @param string $jsCode
   *   Raw Javascript code.
   * @return array
   *   Array of translatable strings
   */
  public static function parseStrings($jsCode) {
    $strings = array();
    // Match all calls to ts() in an array.
    // Note: \s also matches newlines with the 's' modifier.
    preg_match_all('~
      [^\w]ts\s*                                    # match "ts" with whitespace
      \(\s*                                         # match "(" argument list start
      ((?:(?:\'(?:\\\\\'|[^\'])*\'|"(?:\\\\"|[^"])*")(?:\s*\+\s*)?)+)\s*
      [,\)]                                         # match ")" or "," to finish
      ~sx', $jsCode, $matches);
    foreach ($matches[1] as $text) {
      $quote = $text[0];
      // Remove newlines
      $text = str_replace("\\\n", '', $text);
      // Unescape escaped quotes
      $text = str_replace('\\' . $quote, $quote, $text);
      // Remove end quotes
      $text = substr(ltrim($text, $quote), 0, -1);
      $strings[$text] = $text;
    }
    return array_values($strings);
  }

}