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
|
/*
* Copyright (C) 2024 Apple Inc. All rights reserved.
* Copyright (C) 2024 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/Forward.h>
namespace WebCore {
class CSSParserTokenRange;
class CSSValue;
enum CSSValueID : uint16_t;
namespace CSS {
struct PropertyParserState;
}
namespace CSSPropertyParserHelpers {
enum class ValueType {
Specified,
Computed
};
// Take two keywords that make up a <position-area> and build a CSSValue that
// minimizes the serialization of position-area. The minimization done depends on
// the context where the value is used.
//
// For all contexts:
// * If one keyword is explicit about its axis, and the other keyword is span-all,
// only keep the first keyword.
// * If returning a pair of keywords, order the block/X axis keyword before
// the inline/Y axis keyword.
//
// For context where the computed value is used:
// * If one keyword is explicitly on the block/inline axis, and the other keyword
// is explicitly on the opposite axis or axisless, remove the explicit-ness.
// (e.g "block-start inline-end" becomes "start end")
//
// Returns null if the keywords aren't valid/compatible. Otherwise, return a
// CSSPrimitiveValue or CSSValuePair depending on if the keywords can be collapsed.
RefPtr<CSSValue> valueForPositionArea(CSSValueID, CSSValueID, ValueType);
// MARK: <'position-area'>
// https://drafts.csswg.org/css-anchor-position-1/#propdef-position-area
RefPtr<CSSValue> consumePositionArea(CSSParserTokenRange&, CSS::PropertyParserState&);
} // namespace CSSPropertyParserHelpers
} // namespace WebCore
|
