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/* -*- 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_layers_DragMetrics_h
#define mozilla_layers_DragMetrics_h
#include "mozilla/layers/ScrollableLayerGuid.h"
#include "LayersTypes.h"
#include "mozilla/Maybe.h"
namespace IPC {
template <typename T>
struct ParamTraits;
} // namespace IPC
namespace mozilla {
namespace layers {
class AsyncDragMetrics {
friend struct IPC::ParamTraits<mozilla::layers::AsyncDragMetrics>;
public:
// IPC constructor
AsyncDragMetrics()
: mViewId(0),
mPresShellId(0),
mDragStartSequenceNumber(0),
mScrollbarDragOffset(0) {}
AsyncDragMetrics(const ScrollableLayerGuid::ViewID& aViewId,
uint32_t aPresShellId, uint64_t aDragStartSequenceNumber,
CSSCoord aScrollbarDragOffset, ScrollDirection aDirection)
: mViewId(aViewId),
mPresShellId(aPresShellId),
mDragStartSequenceNumber(aDragStartSequenceNumber),
mScrollbarDragOffset(aScrollbarDragOffset),
mDirection(Some(aDirection)) {}
ScrollableLayerGuid::ViewID mViewId;
uint32_t mPresShellId;
uint64_t mDragStartSequenceNumber;
CSSCoord mScrollbarDragOffset; // relative to the thumb's start offset
Maybe<ScrollDirection> mDirection;
};
} // namespace layers
} // namespace mozilla
#endif