widget/windows/WinModifierKeyState.h
author David Major <dmajor@mozilla.com>
Mon, 09 Jul 2018 18:22:45 -0400
changeset 425566 827519f9d0326f76f524061cddff306a56f51255
parent 423599 c2e17337f8b84e8c921007347698d49fb4290bf6
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1463190 - Add forced-MSVC builds to CI to keep that platform green. r=ted

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_widget_WinModifierKeyState_h_
#define mozilla_widget_WinModifierKeyState_h_

#include "mozilla/RefPtr.h"
#include "mozilla/EventForwards.h"
#include "nsStringFwd.h"
#include <windows.h>

namespace mozilla {
namespace widget {

class MOZ_STACK_CLASS ModifierKeyState final
{
public:
  ModifierKeyState();
  explicit ModifierKeyState(Modifiers aModifiers);

  void Update();

  void Unset(Modifiers aRemovingModifiers);
  void Set(Modifiers aAddingModifiers);

  void InitInputEvent(WidgetInputEvent& aInputEvent) const;

  // Do not create IsAltGr() because it's unclear whether:
  // - AltGr key is actually pressed.
  // - Both Ctrl and Alt keys are pressed when a keyboard layout which
  //   has AltGr key.
  // - Both Ctrl and Alt keys are pressed when a keyboard layout which
  //   does not have AltGr key.
  bool IsShift() const;
  bool IsControl() const;
  bool IsAlt() const;
  bool IsWin() const;

  bool MaybeMatchShortcutKey() const;

  bool IsCapsLocked() const;
  bool IsNumLocked() const;
  bool IsScrollLocked() const;

  MOZ_ALWAYS_INLINE Modifiers GetModifiers() const
  {
    return mModifiers;
  }

private:
  Modifiers mModifiers;

  void InitMouseEvent(WidgetInputEvent& aMouseEvent) const;
};

const nsCString ToString(const ModifierKeyState& aModifierKeyState);

} // namespace widget
} // namespace mozilla

#endif // #ifndef mozilla_widget_WinModifierKeyState_h_