function touch_icons_preprocess_html in Touch Icons 7.2

Same name and namespace in other branches

1. 7 touch_icons.module \touch_icons_preprocess_html()

Implement MODULENAME_preprocess_html().

@todo review http://api.drupal.org/api/function/drupal_add_html_head/7 shall we specify a $key as second argument?

File

./touch_icons.module, line 57

Adds a fieldset to theme settings form which allows site administrators to specify Apple Touch icons for Drupal websites. The Touch icon settings behave in a similar manner to the Site Logo and Favicon settings provided by Drupal core.

Code

function touch_icons_preprocess_html(&$vars) {

  // If no key is given, use the current theme if we can determine it.
  $theme = !empty($GLOBALS['theme_key']) ? $GLOBALS['theme_key'] : '';
  if ($theme) {
    $themes = list_themes();
    $theme_object = $themes[$theme];
  }

  // build apple-touch-icon URL
  $url_plain = '';
  if (theme_get_setting('toggle_touch_icon_plain')) {

    // include icon link
    if (theme_get_setting('default_touch_icon_plain')) {

      // use default icon from theme or module
      if (file_exists($touch_icon = dirname($theme_object->filename) . '/apple-touch-icon.png')) {

        // theme provides a default icon
        $url_plain = file_create_url($touch_icon);
      }
      else {

        // fallback to module-provided default icon
        $url_plain = file_create_url(drupal_get_path('module', 'touch_icons') . '/apple-touch-icon.png');
      }
    }
    elseif (theme_get_setting('touch_icon_path_plain')) {

      // custom icon
      $url_plain = file_create_url(theme_get_setting('touch_icon_path_plain'));
    }
  }

  // build apple-touch-icon URL
  $url_precomp = '';
  if (theme_get_setting('toggle_touch_icon_precomp')) {

    // include icon link
    if (theme_get_setting('default_touch_icon_precomp')) {

      // use default icon from theme or module
      if (file_exists($touch_icon = dirname($theme_object->filename) . '/apple-touch-icon-precomposed.png')) {

        // theme provides a default icon
        $url_precomp = file_create_url($touch_icon);
      }
      else {

        // fallback to module-provided default icon
        $url_precomp = file_create_url(drupal_get_path('module', 'touch_icons') . '/apple-touch-icon-precomposed.png');
      }
    }
    elseif (theme_get_setting('touch_icon_path_precomp')) {

      // custom icon
      $url_precomp = file_create_url(theme_get_setting('touch_icon_path_precomp'));
    }
  }

  // output links
  if (check_url($url_plain)) {

    // no output if $url_plain = ''
    drupal_add_html_head_link(array(
      'rel' => 'apple-touch-icon',
      'href' => $url_plain,
      'type' => file_get_mimetype($url_plain),
    ));
  }
  if (check_url($url_precomp)) {

    // no output if $url_precomp = ''
    drupal_add_html_head_link(array(
      'rel' => 'apple-touch-icon-precomposed',
      'href' => $url_precomp,
      'type' => file_get_mimetype($url_precomp),
    ));
  }
}