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function _panopoly_wysiwyg_process_caption_filter in Panopoly WYSIWYG 7

Filter process callback. Add image style class to caption wrapper div.

1 string reference to '_panopoly_wysiwyg_process_caption_filter'
panopoly_wysiwyg_filter_info in ./panopoly_wysiwyg.module
Implements hook_filter_info()

File

./panopoly_wysiwyg.module, line 385

Code

function _panopoly_wysiwyg_process_caption_filter($text, $filter, $format, $langcode, $cache, $cache_id) {

  // We are going to use DOMDocument to parse this which causes $text to default to Latin-1 unless there's
  // a charset meta tag because of course there is no server header here.
  $text = '<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><body>' . $text . '</body>';

  // Prevent parse errors from becoming PHP notices.
  if (function_exists('libxml_use_internal_errors')) {
    $use_errors = libxml_use_internal_errors(TRUE);
  }
  $doc = new DOMDocument();
  $doc
    ->loadHTML($text);
  $xpath = new DOMXpath($doc);

  // We need this crazy XPath query because a simple [@class=caption] will not
  // match if we have multiple classes and a "contains" query will match even
  // for classes like "mycaption". We want to match only if the actual "caption"
  // class is present, with or without other classes.
  // See http://pivotallabs.com/xpath-css-class-matching/
  $captions = $xpath
    ->query("//div[contains(concat(' ',normalize-space(@class),' '),' caption ')]");
  foreach ($captions as $caption) {
    $imgs = $caption
      ->getElementsByTagName("img");
    foreach ($imgs as $img) {
      $img_classes = $img
        ->getAttribute("class");
      $img_path = $img
        ->getAttribute("src");
      $server_path = str_replace('http://' . $_SERVER['HTTP_HOST'], $_SERVER['DOCUMENT_ROOT'], $img_path);
      $doc_path = explode('?', $server_path);
      $img_info = image_get_info($doc_path[0]);

      // We only do this for panopoly image styles; we don't mess with other
      // people's stuff.
      preg_match("/panopoly-image-[a-z]+/", $img_classes, $panopoly_image_class);
    }
    if (empty($panopoly_image_class)) {
      return $text;
    }
    $caption_classes = $caption
      ->getAttribute('class');
    if (!empty($caption_classes)) {
      $caption_classes = $caption_classes . ' ' . $panopoly_image_class[0];
    }
    $caption
      ->setAttribute('class', $caption_classes);
  }

  // Generate the HTML and remove everything except the body of the document.
  $text = $doc
    ->saveHTML();
  $text = preg_replace('/^.*?<body>/s', '', $text);
  $text = preg_replace('/<\\/body>.*$/s', '', $text);

  // Clear the error buffer and restore old error handling mode.
  if (function_exists('libxml_use_internal_errors')) {
    libxml_clear_errors();
    libxml_use_internal_errors($use_errors);
  }
  return $text;
}