/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIPrincipal;

/**
 * Methods specific to LocalStorage, see nsIDOMStorageManager for methods shared
 * with SessionStorage.  Methods may migrate there as SessionStorage is
 * overhauled.
 */
[scriptable, builtinclass, uuid(d4f534da-2744-4db3-8774-8b187c64ade9)]
interface nsILocalStorageManager : nsISupports
{
  readonly attribute boolean nextGenLocalStorageEnabled;

  /**
   * Trigger preload of LocalStorage for the given principal.  For use by
   * ContentParent::AboutToLoadHttpFtpDocumentForChild to maximize the
   * amount of time we have to load the data off disk before the page might
   * attempt to touch LocalStorage.
   *
   * This method will not create a QuotaManager-managed directory on disk if
   * one does not already exist for the principal.
   */
  [implicit_jscontext]
  Promise preload(in nsIPrincipal aPrincipal);

  [implicit_jscontext]
  Promise isPreloaded(in nsIPrincipal aPrincipal);
};