WinPointerEvents.h

Enable keyboard shortcuts

/* -*- 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 WinPointerEvents_h__

#define WinPointerEvents_h__

#include "mozilla/MouseEvents.h"

#include "touchinjection_sdk80.h"

#include <windef.h>

/******************************************************************************

 * WinPointerInfo

 * This is a helper class to handle WM_POINTER*. It only supports Win8 or later.

 ******************************************************************************/

class WinPointerInfo final : public mozilla::WidgetPointerHelper {

 public:

  WinPointerInfo() : WidgetPointerHelper(), mPressure(0), mButtons(0) {}

  WinPointerInfo(uint32_t aPointerId, uint32_t aTiltX, uint32_t aTiltY,

                 float aPressure, int16_t aButtons)

      : WidgetPointerHelper(aPointerId, aTiltX, aTiltY),

        mPressure(aPressure),

        mButtons(aButtons) {}

  float mPressure;

  int16_t mButtons;

};

class WinPointerEvents final {

 public:

  explicit WinPointerEvents();

 public:

  bool ShouldHandleWinPointerMessages(UINT aMsg, WPARAM aWParam);

  uint32_t GetPointerId(WPARAM aWParam) {

    return GET_POINTERID_WPARAM(aWParam);

  bool GetPointerType(uint32_t aPointerId, POINTER_INPUT_TYPE* aPointerType);

  POINTER_INPUT_TYPE GetPointerType(uint32_t aPointerId);

  bool GetPointerInfo(uint32_t aPointerId, POINTER_INFO* aPointerInfo);

  bool GetPointerPenInfo(uint32_t aPointerId, POINTER_PEN_INFO* aPenInfo);

  bool ShouldRollupOnPointerEvent(UINT aMsg, WPARAM aWParam);

  bool ShouldFirePointerEventByWinPointerMessages();

  WinPointerInfo* GetCachedPointerInfo(UINT aMsg, WPARAM aWParam);

  void ConvertAndCachePointerInfo(UINT aMsg, WPARAM aWParam);

  void ConvertAndCachePointerInfo(WPARAM aWParam, WinPointerInfo* aInfo);

 private:

  // Function prototypes

  typedef BOOL(WINAPI* GetPointerTypePtr)(uint32_t aPointerId,

                                          POINTER_INPUT_TYPE* aPointerType);

  typedef BOOL(WINAPI* GetPointerInfoPtr)(uint32_t aPointerId,

                                          POINTER_INFO* aPointerInfo);

  typedef BOOL(WINAPI* GetPointerPenInfoPtr)(uint32_t aPointerId,

                                             POINTER_PEN_INFO* aPenInfo);

  void InitLibrary();

  static HMODULE sLibraryHandle;

  static const wchar_t kPointerLibraryName[];

  // Static function pointers

  static GetPointerTypePtr getPointerType;

  static GetPointerInfoPtr getPointerInfo;

  static GetPointerPenInfoPtr getPointerPenInfo;

  WinPointerInfo mPenPointerDownInfo;

  WinPointerInfo mPenPointerUpInfo;

  WinPointerInfo mPenPointerUpdateInfo;

};

#endif  // #ifndef WinPointerEvents_h__