| /* |
| * Copyright (C) 2013 Google 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| * OWNER OR 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/dom/ElementData.h" |
| |
| #include "sky/engine/core/css/StylePropertySet.h" |
| #include "sky/engine/core/dom/QualifiedName.h" |
| #include "sky/engine/wtf/Vector.h" |
| |
| namespace blink { |
| |
| struct SameSizeAsElementData : public RefCounted<SameSizeAsElementData> { |
| unsigned bitfield; |
| void* pointers[3]; |
| }; |
| |
| COMPILE_ASSERT(sizeof(ElementData) == sizeof(SameSizeAsElementData), element_attribute_data_should_stay_small); |
| |
| static size_t sizeForShareableElementDataWithAttributeCount(unsigned count) |
| { |
| return sizeof(ShareableElementData) + sizeof(Attribute) * count; |
| } |
| |
| ElementData::ElementData() |
| : m_isUnique(true) |
| , m_arraySize(0) |
| , m_styleAttributeIsDirty(false) |
| { |
| } |
| |
| ElementData::ElementData(unsigned arraySize) |
| : m_isUnique(false) |
| , m_arraySize(arraySize) |
| , m_styleAttributeIsDirty(false) |
| { |
| } |
| |
| ElementData::ElementData(const ElementData& other, bool isUnique) |
| : m_isUnique(isUnique) |
| , m_arraySize(isUnique ? 0 : other.attributes().size()) |
| , m_styleAttributeIsDirty(other.m_styleAttributeIsDirty) |
| , m_classNames(other.m_classNames) |
| , m_idForStyleResolution(other.m_idForStyleResolution) |
| { |
| // NOTE: The inline style is copied by the subclass copy constructor since we don't know what to do with it here. |
| } |
| |
| void ElementData::destroy() |
| { |
| if (m_isUnique) |
| delete toUniqueElementData(this); |
| else |
| delete toShareableElementData(this); |
| } |
| |
| PassRefPtr<UniqueElementData> ElementData::makeUniqueCopy() const |
| { |
| if (isUnique()) |
| return adoptRef(new UniqueElementData(toUniqueElementData(*this))); |
| return adoptRef(new UniqueElementData(toShareableElementData(*this))); |
| } |
| |
| bool ElementData::isEquivalent(const ElementData* other) const |
| { |
| AttributeCollection attributes = this->attributes(); |
| if (!other) |
| return attributes.isEmpty(); |
| |
| AttributeCollection otherAttributes = other->attributes(); |
| if (attributes.size() != otherAttributes.size()) |
| return false; |
| |
| AttributeCollection::iterator end = attributes.end(); |
| for (AttributeCollection::iterator it = attributes.begin(); it != end; ++it) { |
| const Attribute* otherAttr = otherAttributes.find(it->name()); |
| if (!otherAttr || it->value() != otherAttr->value()) |
| return false; |
| } |
| return true; |
| } |
| |
| ShareableElementData::ShareableElementData(const Vector<Attribute>& attributes) |
| : ElementData(attributes.size()) |
| { |
| for (unsigned i = 0; i < m_arraySize; ++i) |
| new (&m_attributeArray[i]) Attribute(attributes[i]); |
| } |
| |
| ShareableElementData::~ShareableElementData() |
| { |
| for (unsigned i = 0; i < m_arraySize; ++i) |
| m_attributeArray[i].~Attribute(); |
| } |
| |
| ShareableElementData::ShareableElementData(const UniqueElementData& other) |
| : ElementData(other, false) |
| { |
| if (other.m_inlineStyle) { |
| m_inlineStyle = other.m_inlineStyle->immutableCopyIfNeeded(); |
| } |
| |
| for (unsigned i = 0; i < m_arraySize; ++i) |
| new (&m_attributeArray[i]) Attribute(other.m_attributeVector.at(i)); |
| } |
| |
| PassRefPtr<ShareableElementData> ShareableElementData::createWithAttributes(const Vector<Attribute>& attributes) |
| { |
| void* slot = WTF::fastMalloc(sizeForShareableElementDataWithAttributeCount(attributes.size())); |
| return adoptRef(new (slot) ShareableElementData(attributes)); |
| } |
| |
| UniqueElementData::UniqueElementData() |
| { |
| } |
| |
| UniqueElementData::UniqueElementData(const UniqueElementData& other) |
| : ElementData(other, true) |
| , m_attributeVector(other.m_attributeVector) |
| { |
| m_inlineStyle = other.m_inlineStyle ? other.m_inlineStyle->mutableCopy() : nullptr; |
| } |
| |
| UniqueElementData::UniqueElementData(const ShareableElementData& other) |
| : ElementData(other, true) |
| { |
| // An ShareableElementData should never have a mutable inline StylePropertySet attached. |
| ASSERT(!other.m_inlineStyle || !other.m_inlineStyle->isMutable()); |
| m_inlineStyle = other.m_inlineStyle; |
| |
| unsigned length = other.attributes().size(); |
| m_attributeVector.reserveCapacity(length); |
| for (unsigned i = 0; i < length; ++i) |
| m_attributeVector.uncheckedAppend(other.m_attributeArray[i]); |
| } |
| |
| PassRefPtr<UniqueElementData> UniqueElementData::create() |
| { |
| return adoptRef(new UniqueElementData); |
| } |
| |
| PassRefPtr<ShareableElementData> UniqueElementData::makeShareableCopy() const |
| { |
| void* slot = WTF::fastMalloc(sizeForShareableElementDataWithAttributeCount(m_attributeVector.size())); |
| return adoptRef(new (slot) ShareableElementData(*this)); |
| } |
| |
| } // namespace blink |