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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/css/css_numeric_literal_value.h"
#include "build/build_config.h"
#include "third_party/blink/renderer/core/css/css_to_length_conversion_data.h"
#include "third_party/blink/renderer/core/css/css_value_pool.h"
#include "third_party/blink/renderer/platform/wtf/size_assertions.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
namespace blink {
struct SameSizeAsCSSNumericLiteralValue : CSSPrimitiveValue {
double num;
};
ASSERT_SIZE(CSSNumericLiteralValue, SameSizeAsCSSNumericLiteralValue);
void CSSNumericLiteralValue::TraceAfterDispatch(blink::Visitor* visitor) {
CSSPrimitiveValue::TraceAfterDispatch(visitor);
}
CSSNumericLiteralValue::CSSNumericLiteralValue(double num, UnitType type)
: CSSPrimitiveValue(kNumericLiteralClass), num_(num) {
DCHECK(std::isfinite(num));
DCHECK_NE(UnitType::kUnknown, type);
numeric_literal_unit_type_ = static_cast<unsigned>(type);
}
// static
CSSNumericLiteralValue* CSSNumericLiteralValue::Create(double value,
UnitType type) {
// TODO(timloh): This looks wrong.
if (std::isinf(value))
value = 0;
if (value < 0 || value > CSSValuePool::kMaximumCacheableIntegerValue)
return MakeGarbageCollected<CSSNumericLiteralValue>(value, type);
int int_value = clampTo<int>(value);
if (value != int_value)
return MakeGarbageCollected<CSSNumericLiteralValue>(value, type);
CSSValuePool& pool = CssValuePool();
CSSNumericLiteralValue* result = nullptr;
switch (type) {
case CSSPrimitiveValue::UnitType::kPixels:
result = pool.PixelCacheValue(int_value);
if (!result) {
result = pool.SetPixelCacheValue(
int_value,
MakeGarbageCollected<CSSNumericLiteralValue>(value, type));
}
return result;
case CSSPrimitiveValue::UnitType::kPercentage:
result = pool.PercentCacheValue(int_value);
if (!result) {
result = pool.SetPercentCacheValue(
int_value,
MakeGarbageCollected<CSSNumericLiteralValue>(value, type));
}
return result;
case CSSPrimitiveValue::UnitType::kNumber:
case CSSPrimitiveValue::UnitType::kInteger:
result = pool.NumberCacheValue(int_value);
if (!result) {
result = pool.SetNumberCacheValue(
int_value, MakeGarbageCollected<CSSNumericLiteralValue>(
value, CSSPrimitiveValue::UnitType::kInteger));
}
return result;
default:
return MakeGarbageCollected<CSSNumericLiteralValue>(value, type);
}
}
double CSSNumericLiteralValue::ComputeSeconds() const {
DCHECK(IsTime());
UnitType current_type = GetType();
if (current_type == UnitType::kSeconds)
return num_;
if (current_type == UnitType::kMilliseconds)
return num_ / 1000;
NOTREACHED();
return 0;
}
double CSSNumericLiteralValue::ComputeDegrees() const {
DCHECK(IsAngle());
UnitType current_type = GetType();
switch (current_type) {
case UnitType::kDegrees:
return num_;
case UnitType::kRadians:
return rad2deg(num_);
case UnitType::kGradians:
return grad2deg(num_);
case UnitType::kTurns:
return turn2deg(num_);
default:
NOTREACHED();
return 0;
}
}
double CSSNumericLiteralValue::ComputeDotsPerPixel() const {
DCHECK(IsResolution());
return DoubleValue() * ConversionToCanonicalUnitsScaleFactor(GetType());
}
double CSSNumericLiteralValue::ComputeLengthPx(
const CSSToLengthConversionData& conversion_data) const {
DCHECK(IsLength());
return conversion_data.ZoomedComputedPixels(num_, GetType());
}
void CSSNumericLiteralValue::AccumulateLengthArray(CSSLengthArray& length_array,
double multiplier) const {
LengthUnitType length_type;
bool conversion_success = UnitTypeToLengthUnitType(GetType(), length_type);
DCHECK(conversion_success);
length_array.values[length_type] +=
num_ * ConversionToCanonicalUnitsScaleFactor(GetType()) * multiplier;
length_array.type_flags.set(length_type);
}
bool CSSNumericLiteralValue::IsComputationallyIndependent() const {
if (!IsLength())
return true;
if (IsViewportPercentageLength())
return true;
return !IsRelativeUnit(GetType());
}
static String FormatNumber(double number, const char* suffix) {
#if defined(OS_WIN) && _MSC_VER < 1900
unsigned oldFormat = _set_output_format(_TWO_DIGIT_EXPONENT);
#endif
String result = String::Format("%.6g%s", number, suffix);
#if defined(OS_WIN) && _MSC_VER < 1900
_set_output_format(oldFormat);
#endif
return result;
}
String CSSNumericLiteralValue::CustomCSSText() const {
String text;
switch (GetType()) {
case UnitType::kUnknown:
// FIXME
break;
case UnitType::kInteger:
text = String::Number(GetIntValue());
break;
case UnitType::kNumber:
case UnitType::kPercentage:
case UnitType::kEms:
case UnitType::kQuirkyEms:
case UnitType::kExs:
case UnitType::kRems:
case UnitType::kChs:
case UnitType::kPixels:
case UnitType::kCentimeters:
case UnitType::kDotsPerPixel:
case UnitType::kDotsPerInch:
case UnitType::kDotsPerCentimeter:
case UnitType::kMillimeters:
case UnitType::kQuarterMillimeters:
case UnitType::kInches:
case UnitType::kPoints:
case UnitType::kPicas:
case UnitType::kUserUnits:
case UnitType::kDegrees:
case UnitType::kRadians:
case UnitType::kGradians:
case UnitType::kMilliseconds:
case UnitType::kSeconds:
case UnitType::kHertz:
case UnitType::kKilohertz:
case UnitType::kTurns:
case UnitType::kFraction:
case UnitType::kViewportWidth:
case UnitType::kViewportHeight:
case UnitType::kViewportMin:
case UnitType::kViewportMax: {
// The following integers are minimal and maximum integers which can
// be represented in non-exponential format with 6 digit precision.
constexpr int kMinInteger = -999999;
constexpr int kMaxInteger = 999999;
double value = To<CSSNumericLiteralValue>(this)->DoubleValue();
// If the value is small integer, go the fast path.
if (value < kMinInteger || value > kMaxInteger ||
std::trunc(value) != value) {
text = FormatNumber(value, UnitTypeToString(GetType()));
} else {
StringBuilder builder;
int int_value = value;
const char* unit_type = UnitTypeToString(GetType());
builder.AppendNumber(int_value);
builder.Append(unit_type, strlen(unit_type));
text = builder.ToString();
}
} break;
default:
NOTREACHED();
break;
}
return text;
}
bool CSSNumericLiteralValue::Equals(const CSSNumericLiteralValue& other) const {
if (GetType() != other.GetType())
return false;
switch (GetType()) {
case UnitType::kUnknown:
return false;
case UnitType::kNumber:
case UnitType::kInteger:
case UnitType::kPercentage:
case UnitType::kEms:
case UnitType::kExs:
case UnitType::kRems:
case UnitType::kPixels:
case UnitType::kCentimeters:
case UnitType::kDotsPerPixel:
case UnitType::kDotsPerInch:
case UnitType::kDotsPerCentimeter:
case UnitType::kMillimeters:
case UnitType::kQuarterMillimeters:
case UnitType::kInches:
case UnitType::kPoints:
case UnitType::kPicas:
case UnitType::kUserUnits:
case UnitType::kDegrees:
case UnitType::kRadians:
case UnitType::kGradians:
case UnitType::kMilliseconds:
case UnitType::kSeconds:
case UnitType::kHertz:
case UnitType::kKilohertz:
case UnitType::kTurns:
case UnitType::kViewportWidth:
case UnitType::kViewportHeight:
case UnitType::kViewportMin:
case UnitType::kViewportMax:
case UnitType::kFraction:
return num_ == other.num_;
case UnitType::kQuirkyEms:
return false;
default:
return false;
}
}
} // namespace blink
|
