Same name and namespace in other branches

1. 11.x core/modules/filter/src/Plugin/Filter/FilterAutoP.php \Drupal\filter\Plugin\Filter\FilterAutoP::process()
2. 10 core/modules/filter/src/Plugin/Filter/FilterAutoP.php \Drupal\filter\Plugin\Filter\FilterAutoP::process()
3. 9 core/modules/filter/src/Plugin/Filter/FilterAutoP.php \Drupal\filter\Plugin\Filter\FilterAutoP::process()
4. 8.9.x core/modules/filter/src/Plugin/Filter/FilterAutoP.php \Drupal\filter\Plugin\Filter\FilterAutoP::process()

Performs the filter processing.

Parameters

string $text: The text string to be filtered.

string $langcode: The language code of the text to be filtered.

Return value

\Drupal\filter\FilterProcessResult The filtered text, wrapped in a FilterProcessResult object, and possibly with associated assets, cacheability metadata and placeholders.

Overrides FilterInterface::process

File

core/modules/filter/src/Plugin/Filter/FilterAutoP.php, line 24

Class

FilterAutoP

Provides a filter to convert line breaks to HTML.

Namespace

Drupal\filter\Plugin\Filter

Code

public function process($text, $langcode) {
  // All block level tags.
  $block = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|input|p|h[1-6]|fieldset|legend|hr|article|aside|details|figcaption|figure|footer|header|hgroup|menu|nav|section|summary)';
  // Split at opening and closing PRE, SCRIPT, STYLE, OBJECT, IFRAME tags and
  // comments. We don't apply any processing to the contents of these tags to
  // avoid messing up code. We look for matched pairs and allow basic nesting.
  // For example,
  // "processed<pre>ignored<script>ignored</script>ignored</pre>processed".
  $chunks = preg_split('@(<!--.*?-->|</?(?:pre|script|style|object|iframe|drupal-media|svg|!--)[^>]*>)@i', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
  // Note: PHP ensures the array consists of alternating delimiters and
  // literals and begins and ends with a literal (inserting NULL as required).
  $ignore = FALSE;
  $ignore_tag = '';
  $output = '';
  foreach ($chunks as $i => $chunk) {
    if ($i % 2) {
      if (str_starts_with($chunk, '<!--')) {
        // Nothing to do, this is a comment.
        $output .= $chunk;
        continue;
      }
      // Opening or closing tag?
      $open = $chunk[1] != '/';
      [$tag] = preg_split('/[ >]/', substr($chunk, 2 - $open), 2);
      if (!$ignore) {
        if ($open) {
          $ignore = TRUE;
          $ignore_tag = $tag;
        }
      }
      elseif (!$open && $ignore_tag == $tag) {
        $ignore = FALSE;
        $ignore_tag = '';
      }
    }
    elseif (!$ignore) {
      // Skip if the next chunk starts with Twig theme debug.
      // @see twig_render_template()
      if (isset($chunks[$i + 1]) && $chunks[$i + 1] === '<!-- THEME DEBUG -->') {
        $chunk = rtrim($chunk, "\n");
        $output .= $chunk;
        continue;
      }
      // Skip if the preceding chunk was the end of a Twig theme debug.
      // @see \Drupal\Core\Template\TwigThemeEngine::renderTemplate()
      if (isset($chunks[$i - 1])) {
        if (str_starts_with($chunks[$i - 1], '<!-- BEGIN OUTPUT from ') || str_starts_with($chunks[$i - 1], '<!-- 💡 BEGIN CUSTOM TEMPLATE OUTPUT from ')) {
          $chunk = ltrim($chunk, "\n");
          $output .= $chunk;
          continue;
        }
      }
      // Just to make things a little easier, pad the end.
      $chunk = preg_replace('|\\n*$|', '', $chunk) . "\n\n";
      $chunk = preg_replace('|<br />\\s*<br />|', "\n\n", $chunk);
      // Space things out a little.
      $chunk = preg_replace('!(<' . $block . '[^>]*>)!', "\n\$1", $chunk);
      // Space things out a little.
      $chunk = preg_replace('!(</' . $block . '>)!', "\$1\n\n", $chunk);
      // Take care of duplicates.
      $chunk = preg_replace("/\n\n+/", "\n\n", $chunk);
      $chunk = preg_replace('/^\\n|\\n\\s*\\n$/', '', $chunk);
      // Make paragraphs, including one at the end.
      $chunk = '<p>' . preg_replace('/\\n\\s*\\n\\n?(.)/', "</p>\n<p>\$1", $chunk) . "</p>\n";
      // Problem with nested lists.
      $chunk = preg_replace("|<p>(<li.+?)</p>|", "\$1", $chunk);
      $chunk = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote\$1><p>", $chunk);
      $chunk = str_replace('</blockquote></p>', '</p></blockquote>', $chunk);
      // Under certain strange conditions it could create a P of entirely
      // whitespace.
      $chunk = preg_replace('|<p>\\s*</p>\\n?|', '', $chunk);
      $chunk = preg_replace('!<p>\\s*(</?' . $block . '[^>]*>)!', "\$1", $chunk);
      $chunk = preg_replace('!(</?' . $block . '[^>]*>)\\s*</p>!', "\$1", $chunk);
      // Make line breaks.
      $chunk = preg_replace('|(?<!<br />)\\s*\\n|', "<br />\n", $chunk);
      $chunk = preg_replace('!(</?' . $block . '[^>]*>)\\s*<br />!', "\$1", $chunk);
      $chunk = preg_replace('!<br />(\\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)>)!', '$1', $chunk);
      $chunk = preg_replace('/&([^#])(?![A-Za-z0-9]{1,8};)/', '&amp;$1', $chunk);
    }
    $output .= $chunk;
  }
  return new FilterProcessResult($output);
}

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