1 files changed, 91 insertions, 0 deletions
diff --git a/widget/windows/nsWinGesture.h b/widget/windows/nsWinGesture.h
new file mode 100644
index 0000000000..040b460da9
--- /dev/null
+++ b/widget/windows/nsWinGesture.h
@@ -0,0 +1,91 @@
+/* -*- 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 WinGesture_h__
+#define WinGesture_h__
+
+/*
+ * nsWinGesture - Touch input handling for tablet displays.
+ */
+
+#include "nsdefs.h"
+#include <winuser.h>
+#include <tpcshrd.h>
+#include "nsPoint.h"
+#include "mozilla/EventForwards.h"
+#include "mozilla/TouchEvents.h"
+
+// WM_TABLET_QUERYSYSTEMGESTURESTATUS return values
+#define TABLET_ROTATE_GESTURE_ENABLE 0x02000000
+
+class nsPointWin : public nsIntPoint {
+ public:
+  nsPointWin& operator=(const POINTS& aPoint) {
+    x = aPoint.x;
+    y = aPoint.y;
+    return *this;
+  }
+  nsPointWin& operator=(const POINT& aPoint) {
+    x = aPoint.x;
+    y = aPoint.y;
+    return *this;
+  }
+  nsPointWin& operator=(int val) {
+    x = y = val;
+    return *this;
+  }
+  void ScreenToClient(HWND hWnd) {
+    POINT tmp;
+    tmp.x = x;
+    tmp.y = y;
+    ::ScreenToClient(hWnd, &tmp);
+    *this = tmp;
+  }
+};
+
+class nsWinGesture {
+ public:
+  nsWinGesture();
+
+ public:
+  bool SetWinGestureSupport(
+      HWND hWnd, mozilla::WidgetGestureNotifyEvent::PanDirection aDirection);
+  bool ShutdownWinGestureSupport();
+
+  // Simple gesture process
+  bool ProcessGestureMessage(HWND hWnd, WPARAM wParam, LPARAM lParam,
+                             mozilla::WidgetSimpleGestureEvent& evt);
+
+  // Pan processing
+  bool IsPanEvent(LPARAM lParam);
+  bool ProcessPanMessage(HWND hWnd, WPARAM wParam, LPARAM lParam);
+  bool PanDeltaToPixelScroll(mozilla::WidgetWheelEvent& aWheelEvent);
+  void UpdatePanFeedbackX(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
+  void UpdatePanFeedbackY(HWND hWnd, int32_t scrollOverflow, bool& endFeedback);
+  void PanFeedbackFinalize(HWND hWnd, bool endFeedback);
+
+ private:
+  // Delay load info
+  bool InitLibrary();
+
+  // Pan and feedback state
+  nsPointWin mPanIntermediate;
+  nsPointWin mPanRefPoint;
+  nsPointWin mPixelScrollDelta;
+  bool mPanActive;
+  bool mFeedbackActive;
+  bool mXAxisFeedback;
+  bool mYAxisFeedback;
+  bool mPanInertiaActive;
+  nsPointWin mPixelScrollOverflow;
+
+  // Zoom state
+  double mZoomIntermediate;
+
+  // Rotate state
+  double mRotateIntermediate;
+};
+
+#endif /* WinGesture_h__ */