| /* |
| * Copyright (C) 2011, 2012 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 "sky/engine/core/css/CSSValuePool.h" |
| |
| #include "sky/engine/core/css/CSSValueList.h" |
| #include "sky/engine/core/css/parser/BisonCSSParser.h" |
| #include "sky/engine/core/rendering/style/RenderStyle.h" |
| |
| namespace blink { |
| |
| CSSValuePool& cssValuePool() |
| { |
| DEFINE_STATIC_LOCAL(OwnPtr<CSSValuePool>, pool, (adoptPtr(new CSSValuePool()))); |
| return *pool; |
| } |
| |
| CSSValuePool::CSSValuePool() |
| : m_inheritedValue(CSSInheritedValue::create()) |
| , m_implicitInitialValue(CSSInitialValue::createImplicit()) |
| , m_explicitInitialValue(CSSInitialValue::createExplicit()) |
| , m_colorTransparent(CSSPrimitiveValue::createColor(Color::transparent)) |
| , m_colorWhite(CSSPrimitiveValue::createColor(Color::white)) |
| , m_colorBlack(CSSPrimitiveValue::createColor(Color::black)) |
| { |
| m_identifierValueCache.resize(numCSSValueKeywords); |
| m_pixelValueCache.resize(maximumCacheableIntegerValue + 1); |
| m_percentValueCache.resize(maximumCacheableIntegerValue + 1); |
| m_numberValueCache.resize(maximumCacheableIntegerValue + 1); |
| } |
| |
| PassRefPtr<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSValueID ident) |
| { |
| if (ident <= 0) |
| return CSSPrimitiveValue::createIdentifier(ident); |
| |
| if (!m_identifierValueCache[ident]) |
| m_identifierValueCache[ident] = CSSPrimitiveValue::createIdentifier(ident); |
| return m_identifierValueCache[ident]; |
| } |
| |
| PassRefPtr<CSSPrimitiveValue> CSSValuePool::createIdentifierValue(CSSPropertyID ident) |
| { |
| return CSSPrimitiveValue::createIdentifier(ident); |
| } |
| |
| PassRefPtr<CSSPrimitiveValue> CSSValuePool::createColorValue(unsigned rgbValue) |
| { |
| // These are the empty and deleted values of the hash table. |
| if (rgbValue == Color::transparent) |
| return m_colorTransparent; |
| if (rgbValue == Color::white) |
| return m_colorWhite; |
| // Just because it is common. |
| if (rgbValue == Color::black) |
| return m_colorBlack; |
| |
| // Just wipe out the cache and start rebuilding if it gets too big. |
| const unsigned maximumColorCacheSize = 512; |
| if (m_colorValueCache.size() > maximumColorCacheSize) |
| m_colorValueCache.clear(); |
| |
| RefPtr<CSSPrimitiveValue> dummyValue = nullptr; |
| ColorValueCache::AddResult entry = m_colorValueCache.add(rgbValue, dummyValue); |
| if (entry.isNewEntry) |
| entry.storedValue->value = CSSPrimitiveValue::createColor(rgbValue); |
| return entry.storedValue->value; |
| } |
| |
| PassRefPtr<CSSPrimitiveValue> CSSValuePool::createValue(double value, CSSPrimitiveValue::UnitType type) |
| { |
| if (std::isinf(value)) |
| value = 0; |
| |
| 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: |
| if (!m_pixelValueCache[intValue]) |
| m_pixelValueCache[intValue] = CSSPrimitiveValue::create(value, type); |
| return m_pixelValueCache[intValue]; |
| case CSSPrimitiveValue::CSS_PERCENTAGE: |
| if (!m_percentValueCache[intValue]) |
| m_percentValueCache[intValue] = CSSPrimitiveValue::create(value, type); |
| return m_percentValueCache[intValue]; |
| case CSSPrimitiveValue::CSS_NUMBER: |
| if (!m_numberValueCache[intValue]) |
| m_numberValueCache[intValue] = CSSPrimitiveValue::create(value, type); |
| return m_numberValueCache[intValue]; |
| default: |
| return CSSPrimitiveValue::create(value, type); |
| } |
| } |
| |
| PassRefPtr<CSSPrimitiveValue> CSSValuePool::createValue(const Length& value, const RenderStyle& style) |
| { |
| return CSSPrimitiveValue::create(value); |
| } |
| |
| PassRefPtr<CSSPrimitiveValue> CSSValuePool::createFontFamilyValue(const String& familyName) |
| { |
| RefPtr<CSSPrimitiveValue>& value = m_fontFamilyValueCache.add(familyName, nullptr).storedValue->value; |
| if (!value) |
| value = CSSPrimitiveValue::create(familyName, CSSPrimitiveValue::CSS_STRING); |
| return value; |
| } |
| |
| PassRefPtr<CSSValueList> CSSValuePool::createFontFaceValue(const AtomicString& string) |
| { |
| // Just wipe out the cache and start rebuilding if it gets too big. |
| const unsigned maximumFontFaceCacheSize = 128; |
| if (m_fontFaceValueCache.size() > maximumFontFaceCacheSize) |
| m_fontFaceValueCache.clear(); |
| |
| RefPtr<CSSValueList>& value = m_fontFaceValueCache.add(string, nullptr).storedValue->value; |
| if (!value) |
| value = BisonCSSParser::parseFontFaceValue(string); |
| return value; |
| } |
| |
| } |