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
|
// Copyright 2019 The Chromium Authors
// 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/platform/geometry/calculation_value.h"
#include "base/memory/values_equivalent.h"
#include "third_party/blink/renderer/platform/geometry/blend.h"
#include "third_party/blink/renderer/platform/geometry/calculation_expression_node.h"
#include "third_party/blink/renderer/platform/wtf/size_assertions.h"
namespace blink {
// static
const CalculationValue* CalculationValue::CreateSimplified(
const CalculationExpressionNode* expression,
Length::ValueRange range) {
if (expression->IsPixelsAndPercent()) {
return MakeGarbageCollected<CalculationValue>(
To<CalculationExpressionPixelsAndPercentNode>(*expression)
.GetPixelsAndPercent(),
range);
}
return MakeGarbageCollected<CalculationValue>(PassKey(), expression, range);
}
CalculationValue::CalculationValue(PassKey,
const CalculationExpressionNode* expression,
Length::ValueRange range)
: expression_(expression),
is_non_negative_(range == Length::ValueRange::kNonNegative) {
CHECK(expression);
}
CalculationValue::~CalculationValue() = default;
void CalculationValue::Trace(Visitor* visitor) const {
visitor->Trace(expression_);
}
float CalculationValue::Evaluate(float max_value,
const EvaluationInput& input) const {
float value =
ClampTo<float>(expression_ ? expression_->Evaluate(max_value, input)
: Pixels() + Percent() / 100 * max_value);
return (IsNonNegative() && value < 0) ? 0 : value;
}
bool CalculationValue::operator==(const CalculationValue& other) const {
return value_.pixels == other.value_.pixels &&
value_.percent == other.value_.percent &&
base::ValuesEquivalent(expression_, other.expression_) &&
is_non_negative_ == other.is_non_negative_;
}
const CalculationExpressionNode* CalculationValue::GetOrCreateExpression()
const {
if (expression_) {
return expression_.Get();
}
return MakeGarbageCollected<CalculationExpressionPixelsAndPercentNode>(
GetPixelsAndPercent());
}
const CalculationValue* CalculationValue::Blend(
const CalculationValue& from,
double progress,
Length::ValueRange range) const {
if (!IsExpression() && !from.IsExpression()) {
PixelsAndPercent from_pixels_and_percent = from.GetPixelsAndPercent();
PixelsAndPercent to_pixels_and_percent = GetPixelsAndPercent();
const float pixels = blink::Blend(from_pixels_and_percent.pixels,
to_pixels_and_percent.pixels, progress);
const float percent = blink::Blend(from_pixels_and_percent.percent,
to_pixels_and_percent.percent, progress);
bool has_explicit_pixels = from_pixels_and_percent.has_explicit_pixels |
to_pixels_and_percent.has_explicit_pixels;
bool has_explicit_percent = from_pixels_and_percent.has_explicit_percent |
to_pixels_and_percent.has_explicit_percent;
return MakeGarbageCollected<CalculationValue>(
PixelsAndPercent(pixels, percent, has_explicit_pixels,
has_explicit_percent),
range);
}
const auto* blended_from =
CalculationExpressionOperationNode::CreateSimplified(
CalculationExpressionOperationNode::Children(
{from.GetOrCreateExpression(),
MakeGarbageCollected<CalculationExpressionNumberNode>(
1.0 - progress)}),
CalculationOperator::kMultiply);
const auto* blended_to = CalculationExpressionOperationNode::CreateSimplified(
CalculationExpressionOperationNode::Children(
{GetOrCreateExpression(),
MakeGarbageCollected<CalculationExpressionNumberNode>(progress)}),
CalculationOperator::kMultiply);
const auto* result_expression =
CalculationExpressionOperationNode::CreateSimplified(
{blended_from, blended_to}, CalculationOperator::kAdd);
return CreateSimplified(result_expression, range);
}
const CalculationValue* CalculationValue::SubtractFromOneHundredPercent()
const {
if (!IsExpression()) {
PixelsAndPercent result(-Pixels(), 100 - Percent(), HasExplicitPixels(),
/*has_explicit_percent=*/true);
return MakeGarbageCollected<CalculationValue>(result,
Length::ValueRange::kAll);
}
const auto* hundred_percent =
MakeGarbageCollected<CalculationExpressionPixelsAndPercentNode>(
PixelsAndPercent(0, 100, false, true));
const auto* result_expression =
CalculationExpressionOperationNode::CreateSimplified(
CalculationExpressionOperationNode::Children(
{hundred_percent, GetOrCreateExpression()}),
CalculationOperator::kSubtract);
return CreateSimplified(result_expression, Length::ValueRange::kAll);
}
const CalculationValue* CalculationValue::Add(
const CalculationValue& other) const {
const auto* result_expression =
CalculationExpressionOperationNode::CreateSimplified(
{GetOrCreateExpression(), other.GetOrCreateExpression()},
CalculationOperator::kAdd);
return CreateSimplified(result_expression, Length::ValueRange::kAll);
}
const CalculationValue* CalculationValue::Zoom(double factor) const {
if (expression_) {
return CreateSimplified(expression_->Zoom(factor), GetValueRange());
}
PixelsAndPercent result(Pixels() * factor, Percent(), HasExplicitPixels(),
HasExplicitPercent());
return MakeGarbageCollected<CalculationValue>(result, GetValueRange());
}
bool CalculationValue::HasAuto() const {
return expression_ && expression_->HasAuto();
}
bool CalculationValue::HasContentOrIntrinsicSize() const {
return expression_ && expression_->HasContentOrIntrinsicSize();
}
bool CalculationValue::HasAutoOrContentOrIntrinsicSize() const {
return expression_ && expression_->HasAutoOrContentOrIntrinsicSize();
}
bool CalculationValue::HasPercent() const {
if (expression_) {
return expression_->HasPercent();
}
return HasExplicitPercent();
}
bool CalculationValue::HasPercentOrStretch() const {
if (expression_) {
return expression_->HasPercentOrStretch();
}
return HasExplicitPercent();
}
bool CalculationValue::HasStretch() const {
return expression_ && expression_->HasStretch();
}
bool CalculationValue::HasMinContent() const {
// `HasContentOrIntrinsicSize` is comparatively faster than `HasMinContent`.
return expression_ && expression_->HasContentOrIntrinsicSize() &&
expression_->HasMinContent();
}
bool CalculationValue::HasMaxContent() const {
// `HasContentOrIntrinsicSize` is comparatively faster than `HasMaxContent`.
return expression_ && expression_->HasContentOrIntrinsicSize() &&
expression_->HasMaxContent();
}
bool CalculationValue::HasFitContent() const {
// `HasContentOrIntrinsicSize` is comparatively faster than `HasFitContent`.
return expression_ && expression_->HasContentOrIntrinsicSize() &&
expression_->HasFitContent();
}
bool CalculationValue::HasOnlyFixedAndPercent() const {
if (expression_) {
return !expression_->HasAutoOrContentOrIntrinsicSize() &&
!expression_->HasStretch();
}
return true;
}
} // namespace blink
|
