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/usr/include/thunderbird/mozilla/dom/PermissionMessageUtils.h is in thunderbird-dev 1:52.8.0-1~deb8u1.

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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/. */

#ifndef mozilla_dom_permission_message_utils_h__
#define mozilla_dom_permission_message_utils_h__

#include "ipc/IPCMessageUtils.h"
#include "nsCOMPtr.h"
#include "nsIPrincipal.h"

namespace IPC {

class Principal
{
  friend struct ParamTraits<Principal>;

public:
  Principal()
    : mPrincipal(nullptr)
  {}

  explicit Principal(nsIPrincipal* aPrincipal)
    : mPrincipal(aPrincipal)
  {}

  operator nsIPrincipal*() const { return mPrincipal.get(); }

  Principal& operator=(const Principal& aOther)
  {
    mPrincipal = aOther.mPrincipal;
    return *this;
  }

private:
  nsCOMPtr<nsIPrincipal> mPrincipal;
};

template <>
struct ParamTraits<Principal>
{
  typedef Principal paramType;
  static void Write(Message* aMsg, const paramType& aParam);
  static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult);
};

} // namespace IPC

#endif // mozilla_dom_permission_message_utils_h__