public static function TocFilter::parseOptions in TOC filter 8.2

Parse options from an attributes string.

Parameters

string $text: A string of options.

Return value

array An associative array of parsed name/value pairs.

2 calls to TocFilter::parseOptions()

TocFilter::process in src/Plugin/Filter/TocFilter.php

Performs the filter processing.

TocFilterOptionsTest::testParseOptions in tests/src/Unit/TocFilterOptionsTest.php

Tests converting string of options with TocFilter::parseOptions().

File

src/Plugin/Filter/TocFilter.php, line 193

Contains \Drupal\toc_filter\Plugin\Filter\TocFilter.

Class

TocFilter

Provides a filter to display a table of contents.

Namespace

Drupal\toc_filter\Plugin\Filter

Code

public static function parseOptions($text) {

  // Decode special characters.
  $text = html_entity_decode($text);

  // Convert decode   to expected ASCII code 32 character.
  // See: http://stackoverflow.com/questions/6275380
  $text = str_replace("", ' ', $text);

  // Create a DomElement so that we can parse its attributes as options.
  $html = Html::load('<div ' . $text . ' />');
  $dom_node = $html
    ->getElementsByTagName('div')
    ->item(0);
  $options = [];
  foreach ($dom_node->attributes as $name => $node) {

    // Empty attribute values (ie name="") and attributes with no defined
    // value (ie just name) both return empty strings.
    // See: http://stackoverflow.com/questions/6232412
    // So we are going to work-around this limitation and look at the
    // actually attribute to see if is assigned a value, if not then set it to
    // 'true'.
    $value = $node->nodeValue ?: (preg_match('/' . preg_quote($name) . '\\s*=/i', $text) ? '' : 'true');
    switch (strtolower($value)) {
      case 'true':
      case 'false':
        $value = strtolower($value) === 'true';
        break;
      default:
        if ($value !== '' && is_numeric($value)) {
          $value = floatval($value);
        }
        break;
    }

    // Prefix h1-6 tags with 'headers.' to map it to the correction
    // $option['headers'] array.
    if (preg_match('/h[1-6]/', $name)) {
      $name = 'headers.' . $name;
    }
    self::setOption($options, $name, $value);
  }
  return $options;
}