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function at_core_submit_fonts($values, $theme_name, $path) {

  // $font_styles_data holds all data for the stylesheet

  $font_styles_data = array();

  // Get the font elements array.

  $font_elements = font_elements();

  // Check if fontyourface is enabled, doing this in the loop will be expensive

  $font_your_face_enabled = font_your_face_fonts_enabled();

  // Find the right font for each element

  foreach ($font_elements as $key => $value) {

    // Each item in $font_elements has 3 key value pairs

    $element  = $value['element']  ? $value['element'] : '';  // a key to use later

    $selector = $value['selector'] ? $value['selector'] : ''; // the selector to use when building the CSS

    $setting  = $value['setting']  ? $value['setting'] : '';  // the theme setting used to retrieve the font values

    // Deal with the custom CSS selectors.

    if ($selector == 'custom_css' && !empty($values['selectors_css'])) {

      $selector = filter_xss($values['selectors_css']); // sanitize user entered data

    }

    if ($selector == 'custom_css' && empty($values['selectors_css'])) {

      $selector = 'ruby ruby'; // Valid but highly unlikely to ever match anything

    }

    // Get the font type if isset, not all font settings have a type

    if (isset($values[$setting . '_type'])) {

      $font_type = $values[$setting . '_type'];

    }

    else {

      $font_type = '<none>'; // this is an individual "in-content" heading

    }

    // Get the font size if isset, not all font settings have size

    if (isset($values[$setting . '_size'])) {

      $font_size = $values[$setting . '_size'];

    }

    else {

      $font_size = '<none>'; // this is a grouped "in-content" heading or custom selectors

    }

    // Get the font value (the font name or family) for the right font type if isset,

    // not all font settings have a value

    if (isset($values[$setting . (!empty($font_type) ? '_' . $font_type : '')])) {

      $font_value = $values[$setting . (!empty($font_type) ? '_' . $font_type : '')];

    }

    // Initialize the $font_values array variables

    $font_values['font_family'] = '';

    $font_values['font_size'] = '';

    $font_values['font_style'] = '';

    $font_values['font_weight'] = '';

    // Some Content Headings have no type or family, we add these first,

    // these are the h1 to h6 settings that only have a size

    if ($font_type === '<none>') {

      $font_values['font_size'] = $font_size;

      // Add styles to the array for printing into the stylsheet

      $font_styles_data[] = at_build_font_families($element, $selector, $font_values);

    }

    // Websafe Fonts

    if ($font_type === '') {

      // Get a list of websafe fonts

      $websafe_fonts = websafe_fonts_list($element);

      // Loop over the websafe fonts list and get a match

      foreach ($websafe_fonts as $k => $v) {

        if ($k == $font_value) {

          $font_family = $v;

        }

      $font_values['font_family'] = $font_family;

      $font_values['font_size']   = $font_size;

      // Add styles to the array for printing into the stylsheet

      $font_styles_data[] = at_build_font_families($element, $selector, $font_values);

    }

    // Custom Font stacks (user entered data)

    if ($font_type === 'cfs') {

      $font_values['font_family'] = drupal_strip_dangerous_protocols($font_value); // sanitize user entered data

      $font_values['font_size']   = $font_size;

      // Add styles to the array for printing into the stylsheet

      $font_styles_data[] = at_build_font_families($element, $selector, $font_values);

    }

    // Google Fonts (user entered data)

    if ($font_type === 'gwf') {

      $font_value = "'" . $font_value . "'";

      $font_values['font_family'] = filter_xss_admin($font_value); // sanitize user entered data

      $font_values['font_size']   = $font_size;

      // Add styles to the array for printing into the stylsheet

      $font_styles_data[] = at_build_font_families($element, $selector, $font_values);

    }

    // Font Your Face

    if ($font_your_face_enabled === TRUE) {

      if ($font_type === 'fyf') {

        // pull the font list, we need to iterate over it

        $fyf_fonts = font_your_face_fonts_list($element); // this is a keyed array

        // loop over fyf_fonts list and get a match and retrive the font name

        foreach ($fyf_fonts as $k => $v) {

          if ($k == $font_value) {

            $font_value = $v;

          }

        // Get the font objects from font-your-face, we need additional data out

        // of each object

        $enabled_fonts = fontyourface_get_fonts('enabled = 1');

        foreach ($enabled_fonts as $font) {

          // we need to know if the $font_value matches a $font->name

          if ($font_value == $font->name) {

            // Now we need a buch of variables to get the font family, style and weight

            $font_values['font_family'] = $font->css_family ? $font->css_family : '';

            $font_values['font_style']  = $font->css_style  ? $font->css_style  : '';

            $font_values['font_weight'] = $font->css_weight ? $font->css_weight : '';

          }

        // Load the font size

        $font_values['font_size'] = $font_size;

        // Add styles to the array for printing into the stylsheet

        $font_styles_data[] = at_build_font_families($element, $selector, $font_values);

  // Output data to file

  if (!empty($font_styles_data)) {

    $font_styles = implode("\n", $font_styles_data);

    $font_styles = preg_replace('/^[ \t]*[\r\n]+/m', '', $font_styles);

    $file_name = $theme_name . '.fonts.css';

    $filepath = "$path/$file_name";

    file_unmanaged_save_data($font_styles, $filepath, FILE_EXISTS_REPLACE);

  }