caps/NullPrincipalURI.h
author Gijs Kruitbosch <gijskruitbosch@gmail.com>
Thu, 10 Aug 2017 10:46:19 +0100
changeset 411621 647c08380cd302de2a5050ea9b7537cdf56b015a
parent 410107 81fbe7dc05a694e4e531d163b925e2830dd143d1
child 412143 a5f0bad7a33adbe4a0802a65977069dec6a002d5
permissions -rw-r--r--
Bug 776167 - allow going back to about:newtab, r=smaug,ursula MozReview-Commit-ID: 8FTPI30RqYL

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

/**
 * This wraps nsSimpleURI so that all calls to it are done on the main thread.
 */

#ifndef __NullPrincipalURI_h__
#define __NullPrincipalURI_h__

#include "nsIURI.h"
#include "nsISizeOf.h"
#include "nsString.h"
#include "mozilla/Attributes.h"
#include "nsIIPCSerializableURI.h"
#include "mozilla/MemoryReporting.h"
#include "NullPrincipal.h"
#include "nsID.h"

// {51fcd543-3b52-41f7-b91b-6b54102236e6}
#define NS_NULLPRINCIPALURI_IMPLEMENTATION_CID \
  {0x51fcd543, 0x3b52, 0x41f7, \
    {0xb9, 0x1b, 0x6b, 0x54, 0x10, 0x22, 0x36, 0xe6} }

class NullPrincipalURI final : public nsIURI
                             , public nsISizeOf
                             , public nsIIPCSerializableURI
{
public:
  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIURI
  NS_DECL_NSIIPCSERIALIZABLEURI

  // nsISizeOf
  virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
  virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;

  // NB: This constructor exists only for deserialization.  Everyone
  // else should call Create.
  NullPrincipalURI();

  // Returns null on failure.
  static already_AddRefed<NullPrincipalURI> Create();

private:
  NullPrincipalURI(const NullPrincipalURI& aOther);

  ~NullPrincipalURI() {}

  nsresult Init();

  char mPathBytes[NSID_LENGTH];
  nsFixedCString mPath;
};

#endif // __NullPrincipalURI_h__