1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CONTAINER_STATE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CONTAINER_STATE_H_
namespace blink {
// Enum classes that represents whether a sticky positioned element is stuck to
// a scroll container edge for a given axis. Used for evaluating stuck state
// container queries.
enum class ContainerStuckLogical {
// Not stuck
kNo,
// Stuck to inline-start, or block-start
kStart,
// Stuck to inline-end, or block-end
kEnd,
};
enum class ContainerStuckPhysical {
kNo,
kLeft,
kRight,
kTop,
kBottom,
};
inline ContainerStuckLogical Flip(ContainerStuckLogical stuck) {
switch (stuck) {
case ContainerStuckLogical::kNo:
return ContainerStuckLogical::kNo;
case ContainerStuckLogical::kStart:
return ContainerStuckLogical::kEnd;
case ContainerStuckLogical::kEnd:
return ContainerStuckLogical::kStart;
}
}
// Flags that represent whether a scroll-snapped query container is snapped to
// its scroll container in a given direction.
enum class ContainerSnapped {
kNone = 0,
kX = 1 << 0,
kY = 1 << 1,
};
using ContainerSnappedFlags = unsigned;
// Flags that represent whether a scroll-state query container has scrollable
// overflow in a given direction. For physical directions, kStart is used for
// left/top and kEnd is used for right/bottom.
enum class ContainerScrollable {
kNone = 0,
kStart = 1 << 0,
kEnd = 1 << 1,
};
using ContainerScrollableFlags = unsigned;
inline ContainerScrollableFlags Flip(ContainerScrollableFlags scrollable) {
if (scrollable ==
static_cast<ContainerScrollableFlags>(ContainerScrollable::kNone)) {
return scrollable;
}
ContainerScrollableFlags flipped =
static_cast<ContainerScrollableFlags>(ContainerScrollable::kNone);
if (scrollable &
static_cast<ContainerScrollableFlags>(ContainerScrollable::kStart)) {
flipped |= static_cast<ContainerScrollableFlags>(ContainerScrollable::kEnd);
}
if (scrollable &
static_cast<ContainerScrollableFlags>(ContainerScrollable::kEnd)) {
flipped |=
static_cast<ContainerScrollableFlags>(ContainerScrollable::kStart);
}
return flipped;
}
enum class ContainerScrollDirection {
kNone = 0,
kStart = 1 << 0,
kEnd = 1 << 1,
};
inline ContainerScrollDirection Flip(
ContainerScrollDirection scroll_direction) {
switch (scroll_direction) {
case ContainerScrollDirection::kNone:
return ContainerScrollDirection::kNone;
case ContainerScrollDirection::kStart:
return ContainerScrollDirection::kEnd;
case ContainerScrollDirection::kEnd:
return ContainerScrollDirection::kStart;
}
}
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CONTAINER_STATE_H_
|
