1 | /* |
2 | * Copyright (C) 2016 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
23 | * THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #pragma once |
27 | |
28 | #include <wtf/Vector.h> |
29 | |
30 | namespace WebCore { |
31 | |
32 | template <typename T> |
33 | struct ScrollOffsetRange { |
34 | T start; |
35 | T end; |
36 | }; |
37 | |
38 | template <typename T> |
39 | struct ScrollSnapOffsetsInfo { |
40 | Vector<T> horizontalSnapOffsets; |
41 | Vector<T> verticalSnapOffsets; |
42 | |
43 | // Snap offset ranges represent non-empty ranges of scroll offsets in which scrolling may rest after scroll snapping. |
44 | // These are used in two cases: (1) for proximity scroll snapping, where portions of areas between adjacent snap offsets |
45 | // may emit snap offset ranges, and (2) in the case where the snap area is larger than the snap port, in which case areas |
46 | // where the snap port fits within the snap area are considered to be valid snap positions. |
47 | Vector<ScrollOffsetRange<T>> horizontalSnapOffsetRanges; |
48 | Vector<ScrollOffsetRange<T>> verticalSnapOffsetRanges; |
49 | }; |
50 | |
51 | }; // namespace WebCore |
52 | |