| /* |
| * 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. |
| * Copyright (C) 2014 Samsung Electronics. 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 LiveNodeListBase_h |
| #define LiveNodeListBase_h |
| |
| #include "core/CoreExport.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/ElementTraversal.h" |
| #include "core/html/CollectionType.h" |
| #include "core/html_names.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| enum class NodeListRootType { |
| kNode, |
| kTreeScope, |
| }; |
| |
| class CORE_EXPORT LiveNodeListBase : public GarbageCollectedMixin { |
| public: |
| LiveNodeListBase(ContainerNode& owner_node, |
| NodeListRootType root_type, |
| NodeListInvalidationType invalidation_type, |
| CollectionType collection_type) |
| : owner_node_(owner_node), |
| root_type_(static_cast<unsigned>(root_type)), |
| invalidation_type_(invalidation_type), |
| collection_type_(collection_type) { |
| DCHECK_EQ(root_type_, static_cast<unsigned>(root_type)); |
| DCHECK_EQ(invalidation_type_, static_cast<unsigned>(invalidation_type)); |
| DCHECK_EQ(collection_type_, static_cast<unsigned>(collection_type)); |
| } |
| |
| virtual ~LiveNodeListBase() {} |
| |
| ContainerNode& RootNode() const; |
| |
| void DidMoveToDocument(Document& old_document, Document& new_document); |
| ALWAYS_INLINE bool IsRootedAtTreeScope() const { |
| return root_type_ == static_cast<unsigned>(NodeListRootType::kTreeScope); |
| } |
| ALWAYS_INLINE NodeListInvalidationType InvalidationType() const { |
| return static_cast<NodeListInvalidationType>(invalidation_type_); |
| } |
| ALWAYS_INLINE CollectionType GetType() const { |
| return static_cast<CollectionType>(collection_type_); |
| } |
| ContainerNode& ownerNode() const { return *owner_node_; } |
| |
| virtual void InvalidateCache(Document* old_document = nullptr) const = 0; |
| void InvalidateCacheForAttribute(const QualifiedName*) const; |
| |
| static bool ShouldInvalidateTypeOnAttributeChange(NodeListInvalidationType, |
| const QualifiedName&); |
| |
| protected: |
| Document& GetDocument() const { return owner_node_->GetDocument(); } |
| |
| ALWAYS_INLINE NodeListRootType RootType() const { |
| return static_cast<NodeListRootType>(root_type_); |
| } |
| |
| template <typename MatchFunc> |
| static Element* TraverseMatchingElementsForwardToOffset( |
| Element& current_element, |
| const ContainerNode* stay_within, |
| unsigned offset, |
| unsigned& current_offset, |
| MatchFunc); |
| template <typename MatchFunc> |
| static Element* TraverseMatchingElementsBackwardToOffset( |
| Element& current_element, |
| const ContainerNode* stay_within, |
| unsigned offset, |
| unsigned& current_offset, |
| MatchFunc); |
| |
| virtual void Trace(blink::Visitor* visitor) { visitor->Trace(owner_node_); } |
| |
| private: |
| Member<ContainerNode> owner_node_; // Cannot be null. |
| const unsigned root_type_ : 1; |
| const unsigned invalidation_type_ : 4; |
| const unsigned collection_type_ : 5; |
| }; |
| |
| ALWAYS_INLINE bool LiveNodeListBase::ShouldInvalidateTypeOnAttributeChange( |
| NodeListInvalidationType type, |
| const QualifiedName& attr_name) { |
| switch (type) { |
| case kInvalidateOnClassAttrChange: |
| return attr_name == HTMLNames::classAttr; |
| case kInvalidateOnNameAttrChange: |
| return attr_name == HTMLNames::nameAttr; |
| case kInvalidateOnIdNameAttrChange: |
| return attr_name == HTMLNames::idAttr || attr_name == HTMLNames::nameAttr; |
| case kInvalidateOnForAttrChange: |
| return attr_name == HTMLNames::forAttr; |
| case kInvalidateForFormControls: |
| return attr_name == HTMLNames::nameAttr || |
| attr_name == HTMLNames::idAttr || |
| attr_name == HTMLNames::forAttr || |
| attr_name == HTMLNames::formAttr || |
| attr_name == HTMLNames::typeAttr; |
| case kInvalidateOnHRefAttrChange: |
| return attr_name == HTMLNames::hrefAttr; |
| case kDoNotInvalidateOnAttributeChanges: |
| return false; |
| case kInvalidateOnAnyAttrChange: |
| return true; |
| } |
| return false; |
| } |
| |
| template <typename MatchFunc> |
| Element* LiveNodeListBase::TraverseMatchingElementsForwardToOffset( |
| Element& current_element, |
| const ContainerNode* stay_within, |
| unsigned offset, |
| unsigned& current_offset, |
| MatchFunc is_match) { |
| DCHECK_LT(current_offset, offset); |
| for (Element* next = |
| ElementTraversal::Next(current_element, stay_within, is_match); |
| next; next = ElementTraversal::Next(*next, stay_within, is_match)) { |
| if (++current_offset == offset) |
| return next; |
| } |
| return nullptr; |
| } |
| |
| template <typename MatchFunc> |
| Element* LiveNodeListBase::TraverseMatchingElementsBackwardToOffset( |
| Element& current_element, |
| const ContainerNode* stay_within, |
| unsigned offset, |
| unsigned& current_offset, |
| MatchFunc is_match) { |
| DCHECK_GT(current_offset, offset); |
| for (Element* previous = |
| ElementTraversal::Previous(current_element, stay_within, is_match); |
| previous; previous = ElementTraversal::Previous(*previous, stay_within, |
| is_match)) { |
| if (--current_offset == offset) |
| return previous; |
| } |
| return nullptr; |
| } |
| |
| } // namespace blink |
| |
| #endif // LiveNodeListBase_h |