Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : #include "base/basictypes.h"
       7             : 
       8             : #include "CoalescedWheelData.h"
       9             : #include "FrameMetrics.h"
      10             : 
      11             : using namespace mozilla;
      12             : using namespace mozilla::dom;
      13             : 
      14             : void
      15           0 : CoalescedWheelData::Coalesce(const WidgetWheelEvent& aEvent,
      16             :                              const ScrollableLayerGuid& aGuid,
      17             :                              const uint64_t& aInputBlockId)
      18             : {
      19           0 :   if (IsEmpty()) {
      20           0 :     mCoalescedWheelEvent = MakeUnique<WidgetWheelEvent>(aEvent);
      21           0 :     mGuid = aGuid;
      22           0 :     mInputBlockId = aInputBlockId;
      23             :   } else {
      24           0 :     MOZ_ASSERT(mGuid == aGuid);
      25           0 :     MOZ_ASSERT(mInputBlockId == aInputBlockId);
      26           0 :     MOZ_ASSERT(mCoalescedWheelEvent->mModifiers == aEvent.mModifiers);
      27           0 :     MOZ_ASSERT(mCoalescedWheelEvent->mDeltaMode == aEvent.mDeltaMode);
      28           0 :     MOZ_ASSERT(mCoalescedWheelEvent->mCanTriggerSwipe ==
      29             :                aEvent.mCanTriggerSwipe);
      30           0 :     mCoalescedWheelEvent->mDeltaX += aEvent.mDeltaX;
      31           0 :     mCoalescedWheelEvent->mDeltaY += aEvent.mDeltaY;
      32           0 :     mCoalescedWheelEvent->mDeltaZ += aEvent.mDeltaZ;
      33           0 :     mCoalescedWheelEvent->mLineOrPageDeltaX += aEvent.mLineOrPageDeltaX;
      34           0 :     mCoalescedWheelEvent->mLineOrPageDeltaY += aEvent.mLineOrPageDeltaY;
      35           0 :     mCoalescedWheelEvent->mTimeStamp = aEvent.mTimeStamp;
      36             :   }
      37           0 : }
      38             : 
      39             : bool
      40           0 : CoalescedWheelData::CanCoalesce(const WidgetWheelEvent& aEvent,
      41             :                                 const ScrollableLayerGuid& aGuid,
      42             :                                 const uint64_t& aInputBlockId)
      43             : {
      44           0 :   MOZ_ASSERT(!IsEmpty());
      45           0 :   return !mCoalescedWheelEvent ||
      46           0 :          (mCoalescedWheelEvent->mRefPoint == aEvent.mRefPoint &&
      47           0 :           mCoalescedWheelEvent->mModifiers == aEvent.mModifiers &&
      48           0 :           mCoalescedWheelEvent->mDeltaMode == aEvent.mDeltaMode &&
      49           0 :           mCoalescedWheelEvent->mCanTriggerSwipe == aEvent.mCanTriggerSwipe &&
      50           0 :           mGuid == aGuid &&
      51           0 :           mInputBlockId == aInputBlockId);
      52             : }