You are here

Home » API reference » Advanced CSS/JS Aggregation 7.2 » advagg_mod.module

function advagg_mod_xpath_script_wrapper in Advanced CSS/JS Aggregation 7.2

Use DOMDocument's loadHTML along with DOMXPath's query to find script tags.

Once found, it will also wrap them in a javascript loader function.

Parameters

string $html: HTML fragments.

Return value

string The HTML fragment with less markup errors and script tags wrapped.

1 call to advagg_mod_xpath_script_wrapper()
advagg_mod_js_inline_processor in advagg_mod/advagg_mod.module
Given html, do some processing on the script tags included inside it.

File

advagg_mod/advagg_mod.module, line 2788
Advanced aggregation modifier module.

Code

function advagg_mod_xpath_script_wrapper($html) {

  // Do not throw errors when parsing the html.
  libxml_use_internal_errors(TRUE);
  $dom = new DOMDocument();

  // Load html with full tags all around.
  $dom
    ->loadHTML('<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body>' . $html . '</body></html>');
  $xpath = new DOMXPath($dom);

  // Get all script tags that
  // are not inside of a textarea
  // do not contain a src attribute
  // and the type is empty or has the type of javascript.
  $nodes = $xpath
    ->query("//script[not(@src)][not(ancestor::textarea)][contains(translate(@type, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'javascript') or not(@type)]");
  foreach ($nodes as $node) {
    $matches[2] = $node->nodeValue;

    // $matches[0] = $dom->saveHTML($node);
    $matches[0] = $node->nodeValue;
    $new_html = advagg_mod_wrap_inline_js($matches);
    $advagg = $dom
      ->createElement('script');
    $advagg
      ->appendchild($dom
      ->createTextNode($new_html));
    $node->parentNode
      ->replaceChild($advagg, $node);
  }

  // Render to HTML.
  $output = $dom
    ->saveHTML();

  // Remove the tags we added.
  $output = str_replace(array(
    '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body>',
    '</body></html>',
  ), array(
    '',
    '',
  ), $output);

  // Clear any errors.
  libxml_clear_errors();
  return $output;
}