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/* 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 */
#ifndef mozilla_ScrollSnapTargetId_h_
#define mozilla_ScrollSnapTargetId_h_
#include <cstdint>
#include "nsPoint.h"
#include "nsTArray.h"
#include "Units.h"
namespace mozilla {
// The id for each scroll snap target element to track the last snapped element.
// 0 means it wasn't snapped on the last scroll operation.
enum class ScrollSnapTargetId : uintptr_t {
None = 0,
inline constexpr bool IsEnumCase(ScrollSnapTargetId) { return true; }
struct ScrollSnapTargetIds {
CopyableTArray<ScrollSnapTargetId> mIdsOnX;
CopyableTArray<ScrollSnapTargetId> mIdsOnY;
bool operator==(const ScrollSnapTargetIds& aOther) const {
return mIdsOnX == aOther.mIdsOnX && mIdsOnY == aOther.mIdsOnY;
struct SnapDestination {
nsPoint mPosition;
ScrollSnapTargetIds mTargetIds;
struct CSSSnapDestination {
CSSPoint mPosition;
ScrollSnapTargetIds mTargetIds;
} // namespace mozilla
#endif // mozilla_ScrollSnapTargetId_h_