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
|
/*
* Copyright (C) 2011-2018 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.
*/
#include "config.h"
#include "CSSValuePool.h"
#include "CSSParser.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
namespace WebCore {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(CSSValuePool);
LazyNeverDestroyed<StaticCSSValuePool> staticCSSValuePool;
StaticCSSValuePool::StaticCSSValuePool()
{
m_implicitInitialValue.construct(CSSValue::StaticCSSValue, CSSPrimitiveValue::ImplicitInitialValue);
m_transparentColor.construct(CSSValue::StaticCSSValue, WebCore::Color::transparentBlack);
m_whiteColor.construct(CSSValue::StaticCSSValue, WebCore::Color::white);
m_blackColor.construct(CSSValue::StaticCSSValue, WebCore::Color::black);
for (auto keyword : allCSSValueKeywords())
m_identifierValues[enumToUnderlyingType(keyword)].construct(CSSValue::StaticCSSValue, keyword);
for (unsigned i = 0; i <= maximumCacheableIntegerValue; ++i) {
m_pixelValues[i].construct(CSSValue::StaticCSSValue, i, CSSUnitType::CSS_PX);
m_percentageValues[i].construct(CSSValue::StaticCSSValue, i, CSSUnitType::CSS_PERCENTAGE);
m_numberValues[i].construct(CSSValue::StaticCSSValue, i, CSSUnitType::CSS_NUMBER);
}
}
void StaticCSSValuePool::init()
{
static std::once_flag onceKey;
std::call_once(onceKey, []() {
staticCSSValuePool.construct();
});
}
CSSValuePool::CSSValuePool() = default;
// FIXME: This function needs a name that make it clear that this is not the one and only CSSValuePool, rather the one that can be used only on the main thread.
// FIXME: Consider a design where the value pool thread-local storage so callers don't have to deal directly with the value pool at all.
CSSValuePool& CSSValuePool::singleton()
{
static MainThreadNeverDestroyed<CSSValuePool> pool;
return pool;
}
Ref<CSSColorValue> CSSValuePool::createColorValue(const WebCore::Color& color)
{
// These are the empty and deleted values of the hash table.
if (color == WebCore::Color::transparentBlack)
return staticCSSValuePool->m_transparentColor.get();
if (color == WebCore::Color::white)
return staticCSSValuePool->m_whiteColor.get();
// Just because it is common.
if (color == WebCore::Color::black)
return staticCSSValuePool->m_blackColor.get();
// Remove one entry at random if the cache grows too large.
// FIXME: Use TinyLRUCache instead?
const int maximumColorCacheSize = 512;
if (m_colorValueCache.size() >= maximumColorCacheSize)
m_colorValueCache.remove(m_colorValueCache.random());
return m_colorValueCache.ensure(color, [&color] {
return CSSColorValue::create(color);
}).iterator->value;
}
Ref<CSSPrimitiveValue> CSSValuePool::createFontFamilyValue(const AtomString& familyName)
{
// Remove one entry at random if the cache grows too large.
// FIXME: Use TinyLRUCache instead?
const int maximumFontFamilyCacheSize = 128;
if (m_fontFamilyValueCache.size() >= maximumFontFamilyCacheSize)
m_fontFamilyValueCache.remove(m_fontFamilyValueCache.random());
return m_fontFamilyValueCache.ensure(familyName, [&familyName] {
return CSSPrimitiveValue::createFontFamily(familyName);
}).iterator->value;
}
RefPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomString& string)
{
// Remove one entry at random if the cache grows too large.
// FIXME: Use TinyLRUCache instead?
const int maximumFontFaceCacheSize = 128;
if (m_fontFaceValueCache.size() >= maximumFontFaceCacheSize)
m_fontFaceValueCache.remove(m_fontFaceValueCache.random());
return m_fontFaceValueCache.ensure(string, [&string]() -> RefPtr<CSSValueList> {
auto value = CSSParser::parseSingleValue(CSSPropertyFontFamily, string);
return dynamicDowncast<CSSValueList>(value.get());
}).iterator->value;
}
void CSSValuePool::drain()
{
m_colorValueCache.clear();
m_fontFaceValueCache.clear();
m_fontFamilyValueCache.clear();
}
}
|
