175 lines
6.6 KiB
C++
175 lines
6.6 KiB
C++
/*
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* Copyright (C) 2011-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CSSValuePool.h"
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#include "CSSParser.h"
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#include "CSSPrimitiveValueMappings.h"
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#include "CSSValueKeywords.h"
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#include "CSSValueList.h"
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#include <wtf/text/StringConcatenateNumbers.h>
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namespace WebCore {
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LazyNeverDestroyed<StaticCSSValuePool> staticCSSValuePool;
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StaticCSSValuePool::StaticCSSValuePool()
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{
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m_inheritedValue.construct(CSSValue::StaticCSSValue);
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m_implicitInitialValue.construct(CSSValue::StaticCSSValue, true);
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m_explicitInitialValue.construct(CSSValue::StaticCSSValue, false);
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m_unsetValue.construct(CSSValue::StaticCSSValue);
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m_revertValue.construct(CSSValue::StaticCSSValue);
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m_transparentColor.construct(CSSValue::StaticCSSValue, Color::transparentBlack);
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m_whiteColor.construct(CSSValue::StaticCSSValue, Color::white);
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m_blackColor.construct(CSSValue::StaticCSSValue, Color::black);
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for (unsigned i = firstCSSValueKeyword; i <= lastCSSValueKeyword; ++i)
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m_identifierValues[i].construct(CSSValue::StaticCSSValue, static_cast<CSSValueID>(i));
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for (unsigned i = 0; i < (maximumCacheableIntegerValue + 1); ++i) {
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m_pixelValues[i].construct(CSSValue::StaticCSSValue, i, CSSUnitType::CSS_PX);
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m_percentValues[i].construct(CSSValue::StaticCSSValue, i, CSSUnitType::CSS_PERCENTAGE);
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m_numberValues[i].construct(CSSValue::StaticCSSValue, i, CSSUnitType::CSS_NUMBER);
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}
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}
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void StaticCSSValuePool::init()
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{
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static std::once_flag onceKey;
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std::call_once(onceKey, []() {
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staticCSSValuePool.construct();
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});
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}
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CSSValuePool::CSSValuePool()
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{
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StaticCSSValuePool::init();
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}
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CSSValuePool& CSSValuePool::singleton()
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{
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static MainThreadNeverDestroyed<CSSValuePool> pool;
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return pool;
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}
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Ref<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSValueID ident)
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{
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RELEASE_ASSERT(ident >= firstCSSValueKeyword && ident <= lastCSSValueKeyword);
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return staticCSSValuePool->m_identifierValues[ident].get();
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}
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Ref<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSPropertyID ident)
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{
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return CSSPrimitiveValue::createIdentifier(ident);
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}
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Ref<CSSPrimitiveValue> CSSValuePool::createColorValue(const Color& color)
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{
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// These are the empty and deleted values of the hash table.
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if (color == Color::transparentBlack)
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return staticCSSValuePool->m_transparentColor.get();
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if (color == Color::white)
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return staticCSSValuePool->m_whiteColor.get();
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// Just because it is common.
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if (color == Color::black)
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return staticCSSValuePool->m_blackColor.get();
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// Remove one entry at random if the cache grows too large.
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// FIXME: Use TinyLRUCache instead?
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const int maximumColorCacheSize = 512;
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if (m_colorValueCache.size() >= maximumColorCacheSize)
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m_colorValueCache.remove(m_colorValueCache.random());
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return *m_colorValueCache.ensure(color, [&color] {
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return CSSPrimitiveValue::create(color);
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}).iterator->value;
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}
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Ref<CSSPrimitiveValue> CSSValuePool::createValue(double value, CSSUnitType type)
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{
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ASSERT(std::isfinite(value));
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if (value < 0 || value > StaticCSSValuePool::maximumCacheableIntegerValue)
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return CSSPrimitiveValue::create(value, type);
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int intValue = static_cast<int>(value);
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if (value != intValue)
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return CSSPrimitiveValue::create(value, type);
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switch (type) {
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case CSSUnitType::CSS_PX:
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return staticCSSValuePool->m_pixelValues[intValue].get();
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case CSSUnitType::CSS_PERCENTAGE:
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return staticCSSValuePool->m_percentValues[intValue].get();
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case CSSUnitType::CSS_NUMBER:
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return staticCSSValuePool->m_numberValues[intValue].get();
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default:
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return CSSPrimitiveValue::create(value, type);
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}
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}
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Ref<CSSPrimitiveValue> CSSValuePool::createFontFamilyValue(const String& familyName, FromSystemFontID fromSystemFontID)
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{
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// Remove one entry at random if the cache grows too large.
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// FIXME: Use TinyLRUCache instead?
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const int maximumFontFamilyCacheSize = 128;
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if (m_fontFamilyValueCache.size() >= maximumFontFamilyCacheSize)
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m_fontFamilyValueCache.remove(m_fontFamilyValueCache.random());
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bool isFromSystemID = fromSystemFontID == FromSystemFontID::Yes;
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return *m_fontFamilyValueCache.ensure({ familyName, isFromSystemID }, [&familyName, isFromSystemID] {
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return CSSPrimitiveValue::create(CSSFontFamily { familyName, isFromSystemID });
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}).iterator->value;
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}
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RefPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomString& string)
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{
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// Remove one entry at random if the cache grows too large.
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// FIXME: Use TinyLRUCache instead?
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const int maximumFontFaceCacheSize = 128;
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if (m_fontFaceValueCache.size() >= maximumFontFaceCacheSize)
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m_fontFaceValueCache.remove(m_fontFaceValueCache.random());
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return m_fontFaceValueCache.ensure(string, [&string] () -> RefPtr<CSSValueList> {
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auto result = CSSParser::parseSingleValue(CSSPropertyFontFamily, string);
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if (!is<CSSValueList>(result))
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return nullptr;
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// FIXME: Make downcast work on RefPtr, remove the get() below, and save one reference count churn.
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return downcast<CSSValueList>(result.get());
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}).iterator->value;
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}
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void CSSValuePool::drain()
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{
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m_colorValueCache.clear();
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m_fontFaceValueCache.clear();
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m_fontFamilyValueCache.clear();
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}
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}
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