/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set tw=80 expandtab softtabstop=2 ts=2 sw=2: */

/* 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 "nsIDOMMozBrowserFrame.idl"

interface nsITabParent;

[scriptable, builtinclass, uuid(0c0a862c-1a47-43c0-ae9e-d51835e3e1a6)]
interface nsIMozBrowserFrame : nsIDOMMozBrowserFrame
{
  /**
   * Gets whether this frame really is a browser or app frame.
   *
   * In order to really be a browser frame, this frame's
   * nsIDOMMozBrowserFrame::mozbrowser attribute must be true, and the frame
   * may have to pass various security checks.
   */
  [infallible] readonly attribute boolean reallyIsBrowserOrApp;

  /**
   * Gets whether this frame really is an app frame.
   *
   * In order to really be an app frame, this frame must really be a browser
   * frame (this requirement will go away eventually), and must satisfy one
   * and only one of the following conditions:
   * 1. the frame's mozapp attribute must point to the manifest of a valid app
   * 2. the frame's mozwidget attribute must point to the manifest of a valid
   * app, and the src should be in the |widgetPages| specified by the manifest.
   */
  [infallible] readonly attribute boolean reallyIsApp;

  /**
   * Gets whether this frame really is a widget frame.
   *
   * In order to really be a frame, this frame must really be a browser
   * frame (this requirement will go away eventually), the frame's mozwidget
   * attribute must point to the manifest of a valid app, and the src should
   * be in the |widgetPages| specified by the manifest.
   */
  [infallible] readonly attribute boolean reallyIsWidget;

  /**
   * This corresponds to the expecting-system-message attribute, which tells us
   * whether we should expect that this frame will receive a system message once
   * it starts up.
   *
   * It's the embedder's job to set this attribute on a frame.  Its presence
   * might cause us to increase the priority of the frame's process.
   */
  [infallible] readonly attribute boolean isExpectingSystemMessage;

  /**
   * Gets this frame's app manifest URL or widget manifest URL, if the frame
   * really is an app frame.
   * Otherwise, returns the empty string.
   *
   * This method is guaranteed not to fail.
   */
  readonly attribute AString appManifestURL;

  /**
   * Normally, a frame tries to create its frame loader when its src is
   * modified, or its contentWindow is accessed.
   *
   * disallowCreateFrameLoader prevents the frame element from creating its
   * frame loader (in the same way that not being inside a document prevents the
   * creation of a frame loader).  allowCreateFrameLoader lifts this restriction.
   *
   * These methods are not re-entrant -- it is an error to call
   * disallowCreateFrameLoader twice without first calling allowFrameLoader.
   *
   * It's also an error to call either method if we already have a frame loader.
   */
  void disallowCreateFrameLoader();
  void allowCreateFrameLoader();

  /**
   * Create a remote (i.e., out-of-process) frame loader attached to the given
   * tab parent.
   *
   * It is an error to call this method if we already have a frame loader.
   */
  void createRemoteFrameLoader(in nsITabParent aTabParent);

  /**
   * Initialize the API, and add frame message listener to listen to API
   * invocations.
   */
  [noscript] void initializeBrowserAPI();
};
