/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * 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;
interface nsIURI;

/**
 * C++ exposed interface for the `E10SUtils` object from the
 * `resource://gre/modules/E10SUtils.jsm` module.
 */
[scriptable, uuid(1e18680e-052d-4509-a17e-678f5c495e02)]
interface nsIE10SUtils : nsISupports {
  /**
   * Determine what remote type should be used to load a document with the given
   * principal.
   *
   * @param aPrincipal  The result principal for the document being loaded.
   * @param aChannelOriginalURI. The original URI being loaded
   *                             (which isn't always the same as the Principal's
   *                              URI)
   * @param aMultiProcess  Does the browser have remote tabs enabled.
   * @param aRemoteSubframes  Does the browser have remote subframes enabled.
   * @param aPreferredRemoteType  If multiple remote types are compatible with
   *                              the load, prefer staying in this remote type.
   * @param aCurrentPrincipal  The principal of the currently loaded document.
   * @param aIsSubframe  Is the process switch occuring in a subframe.
   *
   * @return  The remote type to complete this load in.
   */
  AString getRemoteTypeForPrincipal(in nsIPrincipal aPrincipal,
                                    in nsIURI aChannelOriginalURI,
                                    in boolean aMultiProcess,
                                    in boolean aRemoteSubframes,
                                    in AString aPreferredRemoteType,
                                    in nsIPrincipal aCurrentPrincipal,
                                    in boolean aIsSubframe);
};