| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2001 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef LiveNodeList_h |
| #define LiveNodeList_h |
| |
| #include "HTMLNames.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/NodeList.h" |
| #include "core/html/CollectionType.h" |
| #include "wtf/Forward.h" |
| #include "wtf/RefPtr.h" |
| |
| namespace WebCore { |
| |
| class Element; |
| |
| enum NodeListRootType { |
| NodeListIsRootedAtNode, |
| NodeListIsRootedAtDocument, |
| NodeListIsRootedAtDocumentIfOwnerHasItemrefAttr, |
| }; |
| |
| class LiveNodeListBase : public NodeList { |
| public: |
| enum ItemAfterOverrideType { |
| OverridesItemAfter, |
| DoesNotOverrideItemAfter, |
| }; |
| |
| LiveNodeListBase(Node* ownerNode, NodeListRootType rootType, NodeListInvalidationType invalidationType, |
| bool shouldOnlyIncludeDirectChildren, CollectionType collectionType, ItemAfterOverrideType itemAfterOverrideType) |
| : m_ownerNode(ownerNode) |
| , m_cachedItem(0) |
| , m_isLengthCacheValid(false) |
| , m_isItemCacheValid(false) |
| , m_rootType(rootType) |
| , m_invalidationType(invalidationType) |
| , m_shouldOnlyIncludeDirectChildren(shouldOnlyIncludeDirectChildren) |
| , m_isNameCacheValid(false) |
| , m_collectionType(collectionType) |
| , m_overridesItemAfter(itemAfterOverrideType == OverridesItemAfter) |
| , m_isItemRefElementsCacheValid(false) |
| { |
| ASSERT(m_rootType == static_cast<unsigned>(rootType)); |
| ASSERT(m_invalidationType == static_cast<unsigned>(invalidationType)); |
| ASSERT(m_collectionType == static_cast<unsigned>(collectionType)); |
| ASSERT(!m_overridesItemAfter || !isNodeList(collectionType)); |
| |
| if (collectionType != ChildNodeListType) |
| document()->registerNodeList(this); |
| } |
| |
| virtual ~LiveNodeListBase() |
| { |
| if (type() != ChildNodeListType) |
| document()->unregisterNodeList(this); |
| } |
| |
| // DOM API |
| virtual unsigned length() const OVERRIDE; |
| virtual Node* item(unsigned offset) const OVERRIDE; |
| |
| ALWAYS_INLINE bool hasIdNameCache() const { return !isNodeList(type()); } |
| ALWAYS_INLINE bool isRootedAtDocument() const { return m_rootType == NodeListIsRootedAtDocument || m_rootType == NodeListIsRootedAtDocumentIfOwnerHasItemrefAttr; } |
| ALWAYS_INLINE NodeListInvalidationType invalidationType() const { return static_cast<NodeListInvalidationType>(m_invalidationType); } |
| ALWAYS_INLINE CollectionType type() const { return static_cast<CollectionType>(m_collectionType); } |
| Node* ownerNode() const { return m_ownerNode.get(); } |
| ALWAYS_INLINE void invalidateCache(const QualifiedName* attrName) const |
| { |
| if (!attrName || shouldInvalidateTypeOnAttributeChange(invalidationType(), *attrName)) |
| invalidateCache(); |
| else if (hasIdNameCache() && (*attrName == HTMLNames::idAttr || *attrName == HTMLNames::nameAttr)) |
| invalidateIdNameCacheMaps(); |
| } |
| void invalidateCache() const; |
| void invalidateIdNameCacheMaps() const; |
| |
| static bool shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType, const QualifiedName&); |
| |
| protected: |
| Document* document() const { return m_ownerNode->document(); } |
| Node* rootNode() const; |
| ContainerNode* rootContainerNode() const; |
| bool overridesItemAfter() const { return m_overridesItemAfter; } |
| |
| ALWAYS_INLINE bool isItemCacheValid() const { return m_isItemCacheValid; } |
| ALWAYS_INLINE Node* cachedItem() const { return m_cachedItem; } |
| ALWAYS_INLINE unsigned cachedItemOffset() const { return m_cachedItemOffset; } |
| |
| ALWAYS_INLINE bool isLengthCacheValid() const { return m_isLengthCacheValid; } |
| ALWAYS_INLINE unsigned cachedLength() const { return m_cachedLength; } |
| ALWAYS_INLINE void setLengthCache(unsigned length) const |
| { |
| m_cachedLength = length; |
| m_isLengthCacheValid = true; |
| } |
| ALWAYS_INLINE void setItemCache(Node* item, unsigned offset) const |
| { |
| ASSERT(item); |
| m_cachedItem = item; |
| m_cachedItemOffset = offset; |
| m_isItemCacheValid = true; |
| } |
| void setItemCache(Node* item, unsigned offset, unsigned elementsArrayOffset) const; |
| |
| ALWAYS_INLINE bool isItemRefElementsCacheValid() const { return m_isItemRefElementsCacheValid; } |
| ALWAYS_INLINE void setItemRefElementsCacheValid() const { m_isItemRefElementsCacheValid = true; } |
| |
| ALWAYS_INLINE NodeListRootType rootType() const { return static_cast<NodeListRootType>(m_rootType); } |
| |
| bool hasNameCache() const { return m_isNameCacheValid; } |
| void setHasNameCache() const { m_isNameCacheValid = true; } |
| |
| bool shouldOnlyIncludeDirectChildren() const { return m_shouldOnlyIncludeDirectChildren; } |
| |
| private: |
| Node* itemBeforeOrAfterCachedItem(unsigned offset, ContainerNode* root) const; |
| Node* traverseChildNodeListForwardToOffset(unsigned offset, Node* currentNode, unsigned& currentOffset) const; |
| Element* traverseLiveNodeListFirstElement(ContainerNode* root) const; |
| Element* traverseLiveNodeListForwardToOffset(unsigned offset, Element* currentElement, unsigned& currentOffset, ContainerNode* root) const; |
| bool isLastItemCloserThanLastOrCachedItem(unsigned offset) const; |
| bool isFirstItemCloserThanCachedItem(unsigned offset) const; |
| Node* iterateForPreviousNode(Node* current) const; |
| Node* itemBefore(Node* previousItem) const; |
| |
| RefPtr<Node> m_ownerNode; |
| mutable Node* m_cachedItem; |
| mutable unsigned m_cachedLength; |
| mutable unsigned m_cachedItemOffset; |
| mutable unsigned m_isLengthCacheValid : 1; |
| mutable unsigned m_isItemCacheValid : 1; |
| const unsigned m_rootType : 2; |
| const unsigned m_invalidationType : 4; |
| const unsigned m_shouldOnlyIncludeDirectChildren : 1; |
| |
| // From HTMLCollection |
| mutable unsigned m_isNameCacheValid : 1; |
| const unsigned m_collectionType : 5; |
| const unsigned m_overridesItemAfter : 1; |
| mutable unsigned m_isItemRefElementsCacheValid : 1; |
| }; |
| |
| ALWAYS_INLINE bool LiveNodeListBase::shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType type, const QualifiedName& attrName) |
| { |
| switch (type) { |
| case InvalidateOnClassAttrChange: |
| return attrName == HTMLNames::classAttr; |
| case InvalidateOnNameAttrChange: |
| return attrName == HTMLNames::nameAttr; |
| case InvalidateOnIdNameAttrChange: |
| return attrName == HTMLNames::idAttr || attrName == HTMLNames::nameAttr; |
| case InvalidateOnForAttrChange: |
| return attrName == HTMLNames::forAttr; |
| case InvalidateForFormControls: |
| return attrName == HTMLNames::nameAttr || attrName == HTMLNames::idAttr || attrName == HTMLNames::forAttr |
| || attrName == HTMLNames::formAttr || attrName == HTMLNames::typeAttr; |
| case InvalidateOnHRefAttrChange: |
| return attrName == HTMLNames::hrefAttr; |
| case InvalidateOnItemAttrChange: |
| case DoNotInvalidateOnAttributeChanges: |
| return false; |
| case InvalidateOnAnyAttrChange: |
| return true; |
| } |
| return false; |
| } |
| |
| class LiveNodeList : public LiveNodeListBase { |
| public: |
| LiveNodeList(PassRefPtr<Node> ownerNode, CollectionType collectionType, NodeListInvalidationType invalidationType, NodeListRootType rootType = NodeListIsRootedAtNode) |
| : LiveNodeListBase(ownerNode.get(), rootType, invalidationType, collectionType == ChildNodeListType, |
| collectionType, DoesNotOverrideItemAfter) |
| { } |
| |
| virtual Node* namedItem(const AtomicString&) const OVERRIDE; |
| virtual bool nodeMatches(Element*) const = 0; |
| |
| private: |
| virtual bool isLiveNodeList() const OVERRIDE { return true; } |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // LiveNodeList_h |