1 files changed, 150 insertions, 0 deletions
diff --git a/widget/windows/WinPointerEvents.h b/widget/windows/WinPointerEvents.h
new file mode 100644
index 0000000000..db838c514f
--- /dev/null
+++ b/widget/windows/WinPointerEvents.h
@@ -0,0 +1,150 @@
+/* -*- 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 "nsWindow.h"
+
+// Define PointerEvent related macros and structures when building code on
+// Windows version before Win8.
+#if WINVER < 0x0602
+
+// These definitions are copied from WinUser.h. Some of them are not used but
+// keep them here for future usage.
+#  define WM_NCPOINTERUPDATE 0x0241
+#  define WM_NCPOINTERDOWN 0x0242
+#  define WM_NCPOINTERUP 0x0243
+#  define WM_POINTERUPDATE 0x0245
+#  define WM_POINTERDOWN 0x0246
+#  define WM_POINTERUP 0x0247
+#  define WM_POINTERENTER 0x0249
+#  define WM_POINTERLEAVE 0x024A
+#  define WM_POINTERACTIVATE 0x024B
+#  define WM_POINTERCAPTURECHANGED 0x024C
+#  define WM_TOUCHHITTESTING 0x024D
+#  define WM_POINTERWHEEL 0x024E
+#  define WM_POINTERHWHEEL 0x024F
+#  define DM_POINTERHITTEST 0x0250
+
+/*
+ * Flags that appear in pointer input message parameters
+ */
+#  define POINTER_MESSAGE_FLAG_NEW 0x00000001        // New pointer
+#  define POINTER_MESSAGE_FLAG_INRANGE 0x00000002    // Pointer has not departed
+#  define POINTER_MESSAGE_FLAG_INCONTACT 0x00000004  // Pointer is in contact
+#  define POINTER_MESSAGE_FLAG_FIRSTBUTTON 0x00000010   // Primary action
+#  define POINTER_MESSAGE_FLAG_SECONDBUTTON 0x00000020  // Secondary action
+#  define POINTER_MESSAGE_FLAG_THIRDBUTTON 0x00000040   // Third button
+#  define POINTER_MESSAGE_FLAG_FOURTHBUTTON 0x00000080  // Fourth button
+#  define POINTER_MESSAGE_FLAG_FIFTHBUTTON 0x00000100   // Fifth button
+#  define POINTER_MESSAGE_FLAG_PRIMARY 0x00002000       // Pointer is primary
+#  define POINTER_MESSAGE_FLAG_CONFIDENCE \
+    0x00004000  // Pointer is considered unlikely to be accidental
+#  define POINTER_MESSAGE_FLAG_CANCELED \
+    0x00008000  // Pointer is departing in an abnormal manner
+
+/*
+ * Macros to retrieve information from pointer input message parameters
+ */
+#  define GET_POINTERID_WPARAM(wParam) (LOWORD(wParam))
+#  define IS_POINTER_FLAG_SET_WPARAM(wParam, flag) \
+    (((DWORD)HIWORD(wParam) & (flag)) == (flag))
+#  define IS_POINTER_NEW_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_NEW)
+#  define IS_POINTER_INRANGE_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_INRANGE)
+#  define IS_POINTER_INCONTACT_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_INCONTACT)
+#  define IS_POINTER_FIRSTBUTTON_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_FIRSTBUTTON)
+#  define IS_POINTER_SECONDBUTTON_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_SECONDBUTTON)
+#  define IS_POINTER_THIRDBUTTON_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_THIRDBUTTON)
+#  define IS_POINTER_FOURTHBUTTON_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_FOURTHBUTTON)
+#  define IS_POINTER_FIFTHBUTTON_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_FIFTHBUTTON)
+#  define IS_POINTER_PRIMARY_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_PRIMARY)
+#  define HAS_POINTER_CONFIDENCE_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_CONFIDENCE)
+#  define IS_POINTER_CANCELED_WPARAM(wParam) \
+    IS_POINTER_FLAG_SET_WPARAM(wParam, POINTER_MESSAGE_FLAG_CANCELED)
+
+/*
+ * WM_POINTERACTIVATE return codes
+ */
+#  define PA_ACTIVATE MA_ACTIVATE
+#  define PA_NOACTIVATE MA_NOACTIVATE
+
+#endif  // WINVER < 0x0602
+
+/******************************************************************************
+ * 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 ShouldEnableInkCollector();
+  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__