toolkit/xre/LauncherRegistryInfo.h
author Aaron Klotz <aklotz@mozilla.com>
Wed, 16 Jan 2019 00:22:19 +0000
changeset 514031 447687e20dac74b338c8955ebb2d35ddfebd1fc7
parent 513986 73e3a031b232f16866c02598fb72c951d998a211
child 514504 9916e7d6e32720362fd18ed03f1acff4884b86df
permissions -rw-r--r--
Bug 1517636: Add launcher process state to about:support; r=Felipe,flod Differential Revision: https://phabricator.services.mozilla.com/D15759

/* -*- 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 https://mozilla.org/MPL/2.0/. */

#ifndef mozilla_LauncherRegistryInfo_h
#define mozilla_LauncherRegistryInfo_h

#include "mozilla/CmdLineAndEnvUtils.h"
#include "mozilla/LauncherResult.h"
#include "mozilla/Maybe.h"
#include "mozilla/UniquePtr.h"
#include "nsWindowsHelpers.h"

#include <string>

/**
 * We use std::wstring here because this code must be usable within both the
 * launcher process and Gecko itself.
 */

namespace mozilla {

class LauncherRegistryInfo final {
 public:
  enum class ProcessType { Launcher, Browser };

  enum class EnabledState : uint32_t {
    Enabled = 0,
    FailDisabled = 1,
    ForceDisabled = 2,
  };

  LauncherRegistryInfo() : mBinPath(GetFullBinaryPath().get()) {}

  LauncherVoidResult ReflectPrefToRegistry(const bool aEnable);
  LauncherResult<EnabledState> IsEnabled();
  LauncherResult<ProcessType> Check(const ProcessType aDesiredType);
  LauncherVoidResult DisableDueToFailure();

 private:
  enum class Disposition { CreatedNew, OpenedExisting };

 private:
  LauncherResult<Disposition> Open();
  LauncherVoidResult WriteStartTimestamp(ProcessType aProcessType,
                                         const Maybe<uint64_t>& aValue = Nothing());
  LauncherResult<DWORD> GetCurrentImageTimestamp();
  LauncherVoidResult WriteImageTimestamp(DWORD aTimestamp);
  LauncherResult<bool> ClearStartTimestamp(ProcessType aProcessType);
  LauncherVoidResult ClearStartTimestamps();
  LauncherResult<DWORD> GetSavedImageTimestamp();
  LauncherResult<uint64_t> GetStartTimestamp(ProcessType aProcessType);

  LauncherResult<std::wstring> ResolveValueName(ProcessType aProcessType);
  std::wstring ResolveImageTimestampValueName();

 private:
  nsAutoRegKey mRegKey;
  std::wstring mBinPath;
  std::wstring mImageValueName;
  std::wstring mBrowserValueName;
  std::wstring mLauncherValueName;

  static const wchar_t kLauncherSubKeyPath[];
  static const wchar_t kLauncherSuffix[];
  static const wchar_t kBrowserSuffix[];
  static const wchar_t kImageTimestampSuffix[];
};

}  // namespace mozilla

#endif  // mozilla_LauncherRegistryInfo_h