AsyncDragMetrics.h

Enable keyboard shortcuts

/* -*- 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,

                   OuterCSSCoord aScrollbarDragOffset,

                   ScrollDirection aDirection)

      : mViewId(aViewId),

        mPresShellId(aPresShellId),

        mDragStartSequenceNumber(aDragStartSequenceNumber),

        mScrollbarDragOffset(aScrollbarDragOffset),

        mDirection(Some(aDirection)) {}

  ScrollableLayerGuid::ViewID mViewId;

  uint32_t mPresShellId;

  uint64_t mDragStartSequenceNumber;

  OuterCSSCoord mScrollbarDragOffset;  // relative to the thumb's start offset

  Maybe<ScrollDirection> mDirection;

};

}  // namespace layers

}  // namespace mozilla

#endif