#include "config.h"
#include "CSSValuePool.h"
#include "CSSParser.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSStyleSheet.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
namespace WebCore {
CSSValuePool& CSSValuePool::singleton()
{
static NeverDestroyed<CSSValuePool> pool;
return pool;
}
CSSValuePool::CSSValuePool()
{
m_inheritedValue.construct();
m_implicitInitialValue.construct(true);
m_explicitInitialValue.construct(false);
m_unsetValue.construct();
m_revertValue.construct();
m_transparentColor.construct(Color::transparent);
m_whiteColor.construct(Color::white);
m_blackColor.construct(Color::black);
for (unsigned i = 0; i < numCSSValueKeywords; ++i)
m_identifierValues[i].construct(static_cast<CSSValueID>(i));
for (unsigned i = 0; i < (maximumCacheableIntegerValue + 1); ++i) {
m_pixelValues[i].construct(i, CSSPrimitiveValue::CSS_PX);
m_percentValues[i].construct(i, CSSPrimitiveValue::CSS_PERCENTAGE);
m_numberValues[i].construct(i, CSSPrimitiveValue::CSS_NUMBER);
}
}
Ref<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSValueID ident)
{
RELEASE_ASSERT(ident >= 0 && ident < numCSSValueKeywords);
return m_identifierValues[ident].get();
}
Ref<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSPropertyID ident)
{
return CSSPrimitiveValue::createIdentifier(ident);
}
Ref<CSSPrimitiveValue> CSSValuePool::createColorValue(unsigned rgbValue)
{
if (rgbValue == Color::transparent)
return m_transparentColor.get();
if (rgbValue == Color::white)
return m_whiteColor.get();
if (rgbValue == Color::black)
return m_blackColor.get();
const int maximumColorCacheSize = 512;
if (m_colorValueCache.size() >= maximumColorCacheSize)
m_colorValueCache.remove(m_colorValueCache.begin());
ColorValueCache::AddResult entry = m_colorValueCache.add(rgbValue, nullptr);
if (entry.isNewEntry)
entry.iterator->value = CSSPrimitiveValue::createColor(rgbValue);
return *entry.iterator->value;
}
Ref<CSSPrimitiveValue> CSSValuePool::createValue(double value, CSSPrimitiveValue::UnitTypes type)
{
ASSERT(std::isfinite(value));
if (value < 0 || value > maximumCacheableIntegerValue)
return CSSPrimitiveValue::create(value, type);
int intValue = static_cast<int>(value);
if (value != intValue)
return CSSPrimitiveValue::create(value, type);
switch (type) {
case CSSPrimitiveValue::CSS_PX:
return m_pixelValues[intValue].get();
case CSSPrimitiveValue::CSS_PERCENTAGE:
return m_percentValues[intValue].get();
case CSSPrimitiveValue::CSS_NUMBER:
return m_numberValues[intValue].get();
default:
return CSSPrimitiveValue::create(value, type);
}
}
Ref<CSSPrimitiveValue> CSSValuePool::createFontFamilyValue(const String& familyName, FromSystemFontID fromSystemFontID)
{
const int maximumFontFamilyCacheSize = 128;
if (m_fontFamilyValueCache.size() >= maximumFontFamilyCacheSize)
m_fontFamilyValueCache.remove(m_fontFamilyValueCache.begin());
bool isFromSystemID = fromSystemFontID == FromSystemFontID::Yes;
RefPtr<CSSPrimitiveValue>& value = m_fontFamilyValueCache.add({familyName, isFromSystemID}, nullptr).iterator->value;
if (!value)
value = CSSPrimitiveValue::create(CSSFontFamily{familyName, isFromSystemID});
return *value;
}
PassRefPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomicString& string)
{
const int maximumFontFaceCacheSize = 128;
if (m_fontFaceValueCache.size() >= maximumFontFaceCacheSize)
m_fontFaceValueCache.remove(m_fontFaceValueCache.begin());
RefPtr<CSSValueList>& value = m_fontFaceValueCache.add(string, nullptr).iterator->value;
if (!value)
value = CSSParser::parseFontFaceValue(string);
return value;
}
void CSSValuePool::drain()
{
m_colorValueCache.clear();
m_fontFaceValueCache.clear();
m_fontFamilyValueCache.clear();
}
}