function _geshifilter_prepare_callback in GeSHi Filter for syntax highlighting 6

Same name and namespace in other branches

1. 5.2 geshifilter.pages.inc \_geshifilter_prepare_callback()
2. 7 geshifilter.pages.inc \_geshifilter_prepare_callback()

_geshifilter_prepare callback for preparing input text. Replaces the code tags brackets with geshifilter specific ones to prevent possible messing up by other filters, e.g. '[python]foo[/python]' to '[geshifilter-python]foo[/geshifilter-python]'. Replaces newlines with "
" to prevent issues with the line break filter Escapes the tricky characters like angle brackets with check_plain() to prevent messing up by other filters like the HTML filter.

File

./geshifilter.pages.inc, line 155

Code

function _geshifilter_prepare_callback($match, $format) {

  // $match[0]: complete matched string
  // $match[1]: opening bracket ('<' or '[')
  // $match[2]: tag
  // $match[3] and $match[4]: attributes
  // $match[5]: closing bracket
  // $match[6]: source code
  // $match[7]: closing tag
  $tag_name = $match[2];
  $tag_attributes = $match[3];
  $content = $match[6];

  // get the default highlighting mode
  $lang = variable_get('geshifilter_default_highlighting', GESHIFILTER_DEFAULT_PLAINTEXT);
  if ($lang == GESHIFILTER_DEFAULT_DONOTHING) {

    // If the default highlighting mode is GESHIFILTER_DEFAULT_DONOTHING
    // and there is no language set (with language tag or language attribute),
    // we should not do any escaping in this prepare phase,
    // so that other filters can do their thing.
    $enabled_languages = _geshifilter_get_enabled_languages();

    // Usage of language tag?
    list($generic_code_tags, $language_tags, $tag_to_lang) = _geshifilter_get_tags($format);
    if (isset($tag_to_lang[$tag_name]) && isset($enabled_languages[$tag_to_lang[$tag_name]])) {
      $lang = $tag_to_lang[$tag_name];
    }
    else {

      // Get additional settings from the tag attributes.
      $settings = _geshifilter_parse_attributes($tag_attributes, $format);
      if ($settings['language'] && isset($enabled_languages[$settings['language']])) {
        $lang = $settings['language'];
      }
    }

    // If no language was set: prevent escaping and return original string
    if ($lang == GESHIFILTER_DEFAULT_DONOTHING) {
      return $match[0];
    }
  }

  // return escaped code block
  return '[geshifilter-' . $tag_name . $tag_attributes . ']' . str_replace(array(
    "\r",
    "\n",
  ), array(
    '',
    '&#10;',
  ), check_plain($content)) . '[/geshifilter-' . $tag_name . ']';
}