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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
* Copyright (C) 2010-2017 Apple Inc. All rights reserved.
*
* 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 <unicode/uchar.h>
#include <wtf/Expected.h>
#include <wtf/text/StringView.h>
namespace WebCore {
class Decimal;
class QualifiedName;
template<typename CharacterType> bool isComma(CharacterType);
template<typename CharacterType> bool isHTMLSpaceOrComma(CharacterType);
bool isHTMLLineBreak(UChar);
bool isHTMLSpaceButNotLineBreak(UChar);
// 2147483647 is 2^31 - 1.
static const unsigned maxHTMLNonNegativeInteger = 2147483647;
// An implementation of the HTML specification's algorithm to convert a number to a string for number and range types.
String serializeForNumberType(const Decimal&);
String serializeForNumberType(double);
// Convert the specified string to a decimal/double. If the conversion fails, the return value is fallback value or NaN if not specified.
// Leading or trailing illegal characters cause failure, as does passing an empty string.
// The double* parameter may be 0 to check if the string can be parsed without getting the result.
Decimal parseToDecimalForNumberType(StringView);
Decimal parseToDecimalForNumberType(StringView, const Decimal& fallbackValue);
double parseToDoubleForNumberType(StringView);
double parseToDoubleForNumberType(StringView, double fallbackValue);
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-integers
enum class HTMLIntegerParsingError { NegativeOverflow, PositiveOverflow, Other };
WEBCORE_EXPORT Expected<int, HTMLIntegerParsingError> parseHTMLInteger(StringView);
// http://www.whatwg.org/specs/web-apps/current-work/#rules-for-parsing-non-negative-integers
WEBCORE_EXPORT Expected<unsigned, HTMLIntegerParsingError> parseHTMLNonNegativeInteger(StringView);
// https://html.spec.whatwg.org/#valid-non-negative-integer
std::optional<int> parseValidHTMLNonNegativeInteger(StringView);
// https://html.spec.whatwg.org/#valid-floating-point-number
std::optional<double> parseValidHTMLFloatingPointNumber(StringView);
// https://html.spec.whatwg.org/multipage/infrastructure.html#rules-for-parsing-floating-point-number-values
Vector<double> parseHTMLListOfOfFloatingPointNumberValues(StringView);
// https://html.spec.whatwg.org/multipage/semantics.html#attr-meta-http-equiv-refresh
bool parseMetaHTTPEquivRefresh(StringView, double& delay, String& url);
// https://html.spec.whatwg.org/multipage/infrastructure.html#cors-settings-attribute
String parseCORSSettingsAttribute(const AtomString&);
bool threadSafeMatch(const QualifiedName&, const QualifiedName&);
AtomString parseHTMLHashNameReference(StringView);
// https://html.spec.whatwg.org/#rules-for-parsing-dimension-values
struct HTMLDimension {
enum class Type : bool { Percentage, Pixel };
double number;
Type type;
};
std::optional<HTMLDimension> parseHTMLDimension(StringView);
std::optional<HTMLDimension> parseHTMLMultiLength(StringView);
// Inline implementations of some of the functions declared above.
inline bool isHTMLLineBreak(UChar character)
{
return character <= '\r' && (character == '\n' || character == '\r');
}
template<typename CharacterType> inline bool isComma(CharacterType character)
{
return character == ',';
}
template<typename CharacterType> inline bool isHTMLSpaceOrComma(CharacterType character)
{
return isComma(character) || isASCIIWhitespace(character);
}
inline bool isHTMLSpaceButNotLineBreak(UChar character)
{
return isASCIIWhitespace(character) && !isHTMLLineBreak(character);
}
// https://html.spec.whatwg.org/multipage/infrastructure.html#limited-to-only-non-negative-numbers-greater-than-zero
inline unsigned limitToOnlyHTMLNonNegativeNumbersGreaterThanZero(unsigned value, unsigned defaultValue = 1)
{
return (value > 0 && value <= maxHTMLNonNegativeInteger) ? value : defaultValue;
}
inline unsigned limitToOnlyHTMLNonNegativeNumbersGreaterThanZero(StringView stringValue, unsigned defaultValue = 1)
{
ASSERT(defaultValue > 0);
ASSERT(defaultValue <= maxHTMLNonNegativeInteger);
auto optionalValue = parseHTMLNonNegativeInteger(stringValue);
unsigned value = optionalValue && optionalValue.value() ? optionalValue.value() : defaultValue;
ASSERT(value > 0);
ASSERT(value <= maxHTMLNonNegativeInteger);
return value;
}
// https://html.spec.whatwg.org/#reflecting-content-attributes-in-idl-attributes:idl-unsigned-long
inline unsigned limitToOnlyHTMLNonNegative(unsigned value, unsigned defaultValue = 0)
{
ASSERT(defaultValue <= maxHTMLNonNegativeInteger);
return value <= maxHTMLNonNegativeInteger ? value : defaultValue;
}
inline unsigned limitToOnlyHTMLNonNegative(StringView stringValue, unsigned defaultValue = 0)
{
ASSERT(defaultValue <= maxHTMLNonNegativeInteger);
unsigned value = parseHTMLNonNegativeInteger(stringValue).value_or(defaultValue);
ASSERT(value <= maxHTMLNonNegativeInteger);
return value;
}
// https://html.spec.whatwg.org/#clamped-to-the-range
inline unsigned clampHTMLNonNegativeIntegerToRange(StringView stringValue, unsigned min, unsigned max, unsigned defaultValue = 0)
{
ASSERT(defaultValue >= min);
ASSERT(defaultValue <= max);
auto optionalValue = parseHTMLNonNegativeInteger(stringValue);
if (optionalValue)
return std::min(std::max(optionalValue.value(), min), max);
return optionalValue.error() == HTMLIntegerParsingError::PositiveOverflow ? max : defaultValue;
}
} // namespace WebCore
|
