1 files changed, 75 insertions, 0 deletions
diff --git a/widget/windows/WinPointerEvents.h b/widget/windows/WinPointerEvents.h
new file mode 100644
index 0000000000..94179e7b4e
--- /dev/null
+++ b/widget/windows/WinPointerEvents.h
@@ -0,0 +1,75 @@
+/* -*- 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__