widget/windows/WinPointerEvents.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WinPointerEvents_h__
   7 #define WinPointerEvents_h__
   8
   9 #include "mozilla/MouseEvents.h"
  10 #include "touchinjection_sdk80.h"
  11 #include <windef.h>
  12
  13 /******************************************************************************
  14  * WinPointerInfo
  15  *
  16  * This is a helper class to handle WM_POINTER*. It only supports Win8 or later.
  17  *
  18  ******************************************************************************/
  19 class WinPointerInfo final : public mozilla::WidgetPointerHelper {
  20  public:
  21   WinPointerInfo() : WidgetPointerHelper(), mPressure(0), mButtons(0) {}
  22
  23   WinPointerInfo(uint32_t aPointerId, uint32_t aTiltX, uint32_t aTiltY,
  24                  float aPressure, int16_t aButtons)
  25       : WidgetPointerHelper(aPointerId, aTiltX, aTiltY),
  26         mPressure(aPressure),
  27         mButtons(aButtons) {}
  28
  29   float mPressure;
  30   int16_t mButtons;
  31 };
  32
  33 class WinPointerEvents final {
  34  public:
  35   explicit WinPointerEvents();
  36
  37  public:
  38   bool ShouldHandleWinPointerMessages(UINT aMsg, WPARAM aWParam);
  39
  40   uint32_t GetPointerId(WPARAM aWParam) {
  41     return GET_POINTERID_WPARAM(aWParam);
  42   }
  43   bool GetPointerType(uint32_t aPointerId, POINTER_INPUT_TYPE* aPointerType);
  44   POINTER_INPUT_TYPE GetPointerType(uint32_t aPointerId);
  45   bool GetPointerInfo(uint32_t aPointerId, POINTER_INFO* aPointerInfo);
  46   bool GetPointerPenInfo(uint32_t aPointerId, POINTER_PEN_INFO* aPenInfo);
  47   bool ShouldRollupOnPointerEvent(UINT aMsg, WPARAM aWParam);
  48   bool ShouldFirePointerEventByWinPointerMessages();
  49   WinPointerInfo* GetCachedPointerInfo(UINT aMsg, WPARAM aWParam);
  50   void ConvertAndCachePointerInfo(UINT aMsg, WPARAM aWParam);
  51   void ConvertAndCachePointerInfo(WPARAM aWParam, WinPointerInfo* aInfo);
  52
  53  private:
  54   // Function prototypes
  55   typedef BOOL(WINAPI* GetPointerTypePtr)(uint32_t aPointerId,
  56                                           POINTER_INPUT_TYPE* aPointerType);
  57   typedef BOOL(WINAPI* GetPointerInfoPtr)(uint32_t aPointerId,
  58                                           POINTER_INFO* aPointerInfo);
  59   typedef BOOL(WINAPI* GetPointerPenInfoPtr)(uint32_t aPointerId,
  60                                              POINTER_PEN_INFO* aPenInfo);
  61
  62   void InitLibrary();
  63
  64   static HMODULE sLibraryHandle;
  65   static const wchar_t kPointerLibraryName[];
  66   // Static function pointers
  67   static GetPointerTypePtr getPointerType;
  68   static GetPointerInfoPtr getPointerInfo;
  69   static GetPointerPenInfoPtr getPointerPenInfo;
  70   WinPointerInfo mPenPointerDownInfo;
  71   WinPointerInfo mPenPointerUpInfo;
  72   WinPointerInfo mPenPointerUpdateInfo;
  73 };
  74
  75 #endif  // #ifndef WinPointerEvents_h__