1 files changed, 103 insertions, 0 deletions
diff --git a/gfx/layers/apz/util/APZEventState.h b/gfx/layers/apz/util/APZEventState.h
new file mode 100644
index 000000000..44188eaa7
--- /dev/null
+++ b/gfx/layers/apz/util/APZEventState.h
@@ -0,0 +1,103 @@
+/* -*- 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 mozilla_layers_APZEventState_h
+#define mozilla_layers_APZEventState_h
+
+#include <stdint.h>
+
+#include "FrameMetrics.h"     // for ScrollableLayerGuid
+#include "Units.h"
+#include "mozilla/EventForwards.h"
+#include "mozilla/Function.h"
+#include "mozilla/layers/GeckoContentController.h"  // for APZStateChange
+#include "mozilla/RefPtr.h"
+#include "nsCOMPtr.h"
+#include "nsISupportsImpl.h"  // for NS_INLINE_DECL_REFCOUNTING
+#include "nsIWeakReferenceUtils.h"  // for nsWeakPtr
+
+template <class> class nsCOMPtr;
+class nsIDocument;
+class nsIPresShell;
+class nsIWidget;
+
+namespace mozilla {
+namespace layers {
+
+class ActiveElementManager;
+
+typedef function<void(const ScrollableLayerGuid&,
+                      uint64_t /* input block id */,
+                      bool /* prevent default */)>
+        ContentReceivedInputBlockCallback;
+
+/**
+ * A content-side component that keeps track of state for handling APZ
+ * gestures and sending APZ notifications.
+ */
+class APZEventState {
+  typedef GeckoContentController::APZStateChange APZStateChange;
+  typedef FrameMetrics::ViewID ViewID;
+public:
+  APZEventState(nsIWidget* aWidget,
+                ContentReceivedInputBlockCallback&& aCallback);
+
+  NS_INLINE_DECL_REFCOUNTING(APZEventState);
+
+  void ProcessSingleTap(const CSSPoint& aPoint,
+                        const CSSToLayoutDeviceScale& aScale,
+                        Modifiers aModifiers,
+                        const ScrollableLayerGuid& aGuid,
+                        int32_t aClickCount);
+  void ProcessLongTap(const nsCOMPtr<nsIPresShell>& aUtils,
+                      const CSSPoint& aPoint,
+                      const CSSToLayoutDeviceScale& aScale,
+                      Modifiers aModifiers,
+                      const ScrollableLayerGuid& aGuid,
+                      uint64_t aInputBlockId);
+  void ProcessLongTapUp(const nsCOMPtr<nsIPresShell>& aPresShell,
+                        const CSSPoint& aPoint,
+                        const CSSToLayoutDeviceScale& aScale,
+                        Modifiers aModifiers);
+  void ProcessTouchEvent(const WidgetTouchEvent& aEvent,
+                         const ScrollableLayerGuid& aGuid,
+                         uint64_t aInputBlockId,
+                         nsEventStatus aApzResponse,
+                         nsEventStatus aContentResponse);
+  void ProcessWheelEvent(const WidgetWheelEvent& aEvent,
+                         const ScrollableLayerGuid& aGuid,
+                         uint64_t aInputBlockId);
+  void ProcessMouseEvent(const WidgetMouseEvent& aEvent,
+                         const ScrollableLayerGuid& aGuid,
+                         uint64_t aInputBlockId);
+  void ProcessAPZStateChange(ViewID aViewId,
+                             APZStateChange aChange,
+                             int aArg);
+  void ProcessClusterHit();
+private:
+  ~APZEventState();
+  bool SendPendingTouchPreventedResponse(bool aPreventDefault);
+  bool FireContextmenuEvents(const nsCOMPtr<nsIPresShell>& aPresShell,
+                             const CSSPoint& aPoint,
+                             const CSSToLayoutDeviceScale& aScale,
+                             Modifiers aModifiers,
+                             const nsCOMPtr<nsIWidget>& aWidget);
+  already_AddRefed<nsIWidget> GetWidget() const;
+private:
+  nsWeakPtr mWidget;
+  RefPtr<ActiveElementManager> mActiveElementManager;
+  ContentReceivedInputBlockCallback mContentReceivedInputBlockCallback;
+  bool mPendingTouchPreventedResponse;
+  ScrollableLayerGuid mPendingTouchPreventedGuid;
+  uint64_t mPendingTouchPreventedBlockId;
+  bool mEndTouchIsClick;
+  bool mTouchEndCancelled;
+  int32_t mLastTouchIdentifier;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif /* mozilla_layers_APZEventState_h */