function _field_ui_view_mode_menu_access

Menu access callback for the 'view mode display settings' pages.

File

modules/field_ui/field_ui.module, line 267

Code

function _field_ui_view_mode_menu_access($entity_type, $bundle, $view_mode, $access_callback) {
    // It's good practice to call func_get_args() at the beginning of a function
    // to avoid problems with function parameters being modified later. The
    // behavior of func_get_args() changed in PHP7.
    // @see https://www.php.net/manual/en/migration70.incompatible.php#migration70.incompatible.other.func-parameter-modified
    $all_args = func_get_args();
    // First, determine visibility according to the 'use custom display'
    // setting for the view mode.
    $bundle = field_extract_bundle($entity_type, $bundle);
    $view_mode_settings = field_view_mode_settings($entity_type, $bundle);
    $visibility = $view_mode == 'default' || !empty($view_mode_settings[$view_mode]['custom_settings']);
    // Then, determine access according to the $access parameter. This duplicates
    // part of _menu_check_access().
    if ($visibility) {
        // Grab the variable 'access arguments' part.
        $args = array_slice($all_args, 4);
        $callback = empty($access_callback) ? 0 : trim($access_callback);
        if (is_numeric($callback)) {
            return (bool) $callback;
        }
        else {
            // As call_user_func_array() is quite slow and user_access is a very
            // common callback, it is worth making a special case for it.
            if ($access_callback == 'user_access') {
                return count($args) == 1 ? user_access($args[0]) : user_access($args[0], $args[1]);
            }
            elseif (function_exists($access_callback)) {
                return call_user_func_array($access_callback, $args);
            }
        }
    }
}