1/*
2 * Copyright (C) 2014-2016 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#if ENABLE(CSS_SCROLL_SNAP)
29
30#include "LengthBox.h"
31#include "LengthSize.h"
32#include "RenderStyleConstants.h"
33#include <wtf/RefCounted.h>
34#include <wtf/Vector.h>
35
36namespace WebCore {
37
38struct ScrollSnapType {
39 ScrollSnapAxis axis { ScrollSnapAxis::Both };
40 ScrollSnapStrictness strictness { ScrollSnapStrictness::None };
41};
42
43inline bool operator==(const ScrollSnapType& a, const ScrollSnapType& b)
44{
45 return a.axis == b.axis && a.strictness == b.strictness;
46}
47
48inline bool operator!=(const ScrollSnapType& a, const ScrollSnapType& b) { return !(a == b); }
49
50class StyleScrollSnapPort : public RefCounted<StyleScrollSnapPort> {
51public:
52 static Ref<StyleScrollSnapPort> create() { return adoptRef(*new StyleScrollSnapPort); }
53 Ref<StyleScrollSnapPort> copy() const;
54
55 ScrollSnapType type;
56 LengthBox scrollPadding { 0, 0, 0, 0 };
57
58private:
59 StyleScrollSnapPort();
60 StyleScrollSnapPort(const StyleScrollSnapPort&);
61};
62
63inline bool operator==(const StyleScrollSnapPort& a, const StyleScrollSnapPort& b)
64{
65 return a.type == b.type && a.scrollPadding == b.scrollPadding;
66}
67
68inline bool operator!=(const StyleScrollSnapPort& a, const StyleScrollSnapPort& b) { return !(a == b); }
69
70struct ScrollSnapAlign {
71 ScrollSnapAxisAlignType x { ScrollSnapAxisAlignType::None };
72 ScrollSnapAxisAlignType y { ScrollSnapAxisAlignType::None };
73};
74
75inline bool operator==(const ScrollSnapAlign& a, const ScrollSnapAlign& b)
76{
77 return a.x == b.x && a.y == b.y;
78}
79
80inline bool operator!=(const ScrollSnapAlign& a, const ScrollSnapAlign& b) { return !(a == b); }
81
82class StyleScrollSnapArea : public RefCounted<StyleScrollSnapArea> {
83public:
84 static Ref<StyleScrollSnapArea> create() { return adoptRef(*new StyleScrollSnapArea); }
85 Ref<StyleScrollSnapArea> copy() const;
86 bool hasSnapPosition() const { return alignment.x != ScrollSnapAxisAlignType::None || alignment.y != ScrollSnapAxisAlignType::None; }
87
88 ScrollSnapAlign alignment;
89 LengthBox scrollSnapMargin { 0, 0, 0, 0 };
90
91private:
92 StyleScrollSnapArea();
93 StyleScrollSnapArea(const StyleScrollSnapArea&);
94};
95
96inline bool operator==(const StyleScrollSnapArea& a, const StyleScrollSnapArea& b)
97{
98 return a.alignment == b.alignment && a.scrollSnapMargin == b.scrollSnapMargin;
99}
100
101inline bool operator!=(const StyleScrollSnapArea& a, const StyleScrollSnapArea& b) { return !(a == b); }
102
103} // namespace WebCore
104
105#endif // ENABLE(CSS_SCROLL_SNAP)
106