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-rw-r--r--layout/generic/ScrollSnapTargetId.h41
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diff --git a/layout/generic/ScrollSnapTargetId.h b/layout/generic/ScrollSnapTargetId.h
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+++ b/layout/generic/ScrollSnapTargetId.h
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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 http://mozilla.org/MPL/2.0/. */
+
+#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,
+};
+
+struct ScrollSnapTargetIds {
+ CopyableTArray<ScrollSnapTargetId> mIdsOnX;
+ CopyableTArray<ScrollSnapTargetId> mIdsOnY;
+ bool operator==(const ScrollSnapTargetIds& aOther) const {
+ return mIdsOnX == aOther.mIdsOnX && mIdsOnY == aOther.mIdsOnY;
+ }
+};
+
+struct SnapTarget {
+ nsPoint mPosition;
+ ScrollSnapTargetIds mTargetIds;
+};
+
+struct CSSSnapTarget {
+ CSSPoint mPosition;
+ ScrollSnapTargetIds mTargetIds;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_ScrollSnapTargetId_h_