зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.6 KiB
C++
93 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_SafeMode_h
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#define mozilla_SafeMode_h
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// NB: This code must be able to run apart from XPCOM
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#include "mozilla/CmdLineAndEnvUtils.h"
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#include "mozilla/Maybe.h"
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#if defined(XP_WIN)
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# include "mozilla/PolicyChecks.h"
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# include <windows.h>
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#endif // defined(XP_WIN)
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// Undo X11/X.h's definition of None
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#undef None
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namespace mozilla {
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enum class SafeModeFlag : uint32_t {
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None = 0,
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Unset = (1 << 0),
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NoKeyPressCheck = (1 << 1),
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};
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MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(SafeModeFlag)
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template <typename CharT>
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inline Maybe<bool> IsSafeModeRequested(
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int& aArgc, CharT* aArgv[],
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const SafeModeFlag aFlags = SafeModeFlag::Unset) {
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CheckArgFlag checkArgFlags = CheckArgFlag::None;
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if (aFlags & SafeModeFlag::Unset) {
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checkArgFlags |= CheckArgFlag::RemoveArg;
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}
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ArgResult ar =
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CheckArg(aArgc, aArgv, GetLiteral<CharT, FlagLiteral::safemode>(),
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static_cast<const CharT**>(nullptr), checkArgFlags);
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if (ar == ARG_BAD) {
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return Nothing();
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}
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bool result = ar == ARG_FOUND;
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#if defined(XP_WIN)
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// If the shift key is pressed and the ctrl and / or alt keys are not pressed
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// during startup, start in safe mode. GetKeyState returns a short and the
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// high order bit will be 1 if the key is pressed. By masking the returned
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// short with 0x8000 the result will be 0 if the key is not pressed and
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// non-zero otherwise.
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if (!(aFlags & SafeModeFlag::NoKeyPressCheck) &&
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(GetKeyState(VK_SHIFT) & 0x8000) && !(GetKeyState(VK_CONTROL) & 0x8000) &&
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!(GetKeyState(VK_MENU) & 0x8000) &&
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!EnvHasValue("MOZ_DISABLE_SAFE_MODE_KEY")) {
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result = true;
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}
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if (result && PolicyCheckBoolean(L"DisableSafeMode")) {
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result = false;
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}
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#endif // defined(XP_WIN)
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#if defined(XP_MACOSX)
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if (!(aFlags & SafeModeFlag::NoKeyPressCheck) &&
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(GetCurrentEventKeyModifiers() & optionKey) &&
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!EnvHasValue("MOZ_DISABLE_SAFE_MODE_KEY")) {
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result = true;
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}
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#endif // defined(XP_MACOSX)
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// The Safe Mode Policy should not be enforced for the env var case
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// (used by updater and crash-recovery).
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if (EnvHasValue("MOZ_SAFE_MODE_RESTART")) {
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result = true;
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if (aFlags & SafeModeFlag::Unset) {
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// unset the env variable
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SaveToEnv("MOZ_SAFE_MODE_RESTART=");
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}
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}
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return Some(result);
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}
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} // namespace mozilla
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#endif // mozilla_SafeMode_h
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