/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_dom_CoalescedInputData_h
#define mozilla_dom_CoalescedInputData_h
#include "mozilla/UniquePtr.h"
#include "mozilla/layers/ScrollableLayerGuid.h"
#include "nsRefreshObservers.h"
class nsRefreshDriver;
namespace mozilla::dom {
class BrowserChild;
template <
class InputEventType>
class CoalescedInputData {
protected:
using ScrollableLayerGuid = mozilla::layers::ScrollableLayerGuid;
UniquePtr<InputEventType> mCoalescedInputEvent;
ScrollableLayerGuid mGuid;
uint64_t mInputBlockId;
public:
CoalescedInputData() : mInputBlockId(0) {}
void RetrieveDataFrom(CoalescedInputData& aSource) {
mCoalescedInputEvent = std::move(aSource.mCoalescedInputEvent);
mGuid = aSource.mGuid;
mInputBlockId = aSource.mInputBlockId;
}
bool IsEmpty() {
return !mCoalescedInputEvent; }
bool CanCoalesce(
const InputEventType& aEvent,
const ScrollableLayerGuid& aGuid,
const uint64_t& aInputBlockId);
UniquePtr<InputEventType> TakeCoalescedEvent() {
return std::move(mCoalescedInputEvent);
}
ScrollableLayerGuid GetScrollableLayerGuid() {
return mGuid; }
uint64_t GetInputBlockId() {
return mInputBlockId; }
};
class CoalescedInputFlusher :
public nsARefreshObserver {
public:
explicit CoalescedInputFlusher(BrowserChild* aBrowserChild);
virtual void WillRefresh(mozilla::TimeStamp aTime) override = 0;
NS_INLINE_DECL_REFCOUNTING(CoalescedInputFlusher, override)
void StartObserver();
void RemoveObserver();
protected:
virtual ~CoalescedInputFlusher();
nsRefreshDriver* GetRefreshDriver();
BrowserChild* mBrowserChild;
RefPtr<nsRefreshDriver> mRefreshDriver;
};
}
// namespace mozilla::dom
#endif // mozilla_dom_CoalescedInputData_h
