function picture_picture_image_uri in Picture 7

Same name and namespace in other branches

1. 7.2 picture.module \picture_picture_image_uri()

Implements hook_picture_image_uri().

File

./picture.module, line 1353

Picture formatter.

Code

function picture_picture_image_uri($src) {
  global $base_path;
  $uri = '';

  // Prepare the src by removing http:// or https://.
  $src = parse_url($src, PHP_URL_PATH);

  // Remove leading or trailing slashes.
  $src = trim($src, '/');

  // List all visible stream wrappers. Make sure they're also local since the
  // getDirectoryPath method exists only for classes that extend
  // DrupalLocalStreamWrapper.
  $local_visible_stream_wrappers = array_intersect_key(file_get_stream_wrappers(STREAM_WRAPPERS_LOCAL), file_get_stream_wrappers(STREAM_WRAPPERS_VISIBLE));
  $needles = array();
  $matches = array();
  foreach ($local_visible_stream_wrappers as $scheme => $data) {
    $class = file_stream_wrapper_get_class($scheme);
    $stream_wrapper = new $class();

    // Trim leading or trailing slashes since the Directory could be root
    // relative.
    $needles[$scheme] = trim($base_path . $stream_wrapper
      ->getDirectoryPath(), '/');

    // Check whether the file stream directory is at the beginning of
    // the image src. Use === since strpos could return false.
    if (!empty($needles[$scheme]) && strpos($src, $needles[$scheme]) === 0) {
      $matches[$scheme] = $needles[$scheme];
    }
  }

  // No file stream wrapper is starting with the image src.
  // So it's not a public file.
  if (empty($matches)) {

    // Check for managed/private file with relative path like 'system/files/...'.
    $src_exploded = explode('/', $src);
    if ($src_exploded[0] == 'system' && $src_exploded[1] == 'files') {

      // Managed/private file recognized.
      // Check for image style derivatives.
      if ($src_exploded[2] == 'styles') {

        // Image style recognized.
        $unwanted_part = 'system/files/styles/' . $src_exploded[3] . '/private/';
        $uri = str_replace($unwanted_part, 'private://', $src);
        $uri = file_stream_wrapper_uri_normalize($uri);
        return urldecode($uri);
      }
      else {

        // No image style recognized; must be an original.
        $unwanted_part = 'system/files/';
        $uri = str_replace($unwanted_part, 'private://', $src);
        $uri = file_stream_wrapper_uri_normalize($uri);
        return urldecode($uri);
      }

      // It's not a managed/private file.
    }
    else {

      // Can't figure out the Drupal uri.
      return FALSE;
    }
  }

  // If one file scheme directory is a subdirectory of another file
  // scheme directory, choose the longer one. This issue is possible with
  // the following scenario:
  // public file dir: /sites/default/files/
  // private file dir: /sites/default/files/private/
  // image src: /sites/default/files/private/the-image.jpg
  // In this example, the intended scheme would be 'private'.
  // Find the length of each matching directory path.
  $lengths = array_map('strlen', $matches);

  // Determine the key of the longest one.
  $the_scheme = array_search(max($lengths), $lengths);

  // Construct the Drupal uri.
  $uri = $the_scheme . '://' . str_replace($matches[$the_scheme], '', $src);
  return $uri;
}