function _icon_from_theme

Checks if the current theme provides an icon.

Do not call this function directly. Use icon() instead.

@private

Parameters

string $icon_name: The icon name to be located.

Return value

string|void: The path to the icon if found.

See also

icon()

File

core/includes/icon.inc, line 145

Provides the Backdrop API for placing icons.

Code

function _icon_from_theme($icon_name, $theme = NULL) {
  $theme = isset($theme) ? $theme : $GLOBALS['theme_key'];

  // Check if the theme provides a non-default icon path.
  $theme_icon_directory = theme_get_setting('icon_directory', $theme);

  // Otherwise just check in the theme "icons" directory.
  if (!$theme_icon_directory) {
    $theme_icon_directory = 'icons';
  }

  // Append the filename and extension, and check for a theme-provided icon.
  $theme_icon_path = backdrop_get_path('theme', $theme) . '/' . $theme_icon_directory . '/' . $icon_name . '.svg';

  // If the icon exists in this theme return it.
  if (file_exists($theme_icon_path)) {
    return $theme_icon_path;
  }

  // If icon does not exist in this theme, but this theme has a base theme,
  // check that location for an icon. Loop recursively through all base themes.
  $themes = list_themes();
  $theme_info = $themes[$theme];
  if (isset($theme_info->info['base theme'])) {
    return _icon_from_theme($icon_name, $theme_info->info['base theme']);
  }
}