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/*
* 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 THIRD_PARTY_BLINK_RENDERER_CORE_DOM_LIVE_NODE_LIST_BASE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_LIVE_NODE_LIST_BASE_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/element_traversal.h"
#include "third_party/blink/renderer/core/html/collection_type.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
enum class NodeListSearchRoot {
kOwnerNode,
kTreeScope,
};
class CORE_EXPORT LiveNodeListBase : public GarbageCollectedMixin {
public:
LiveNodeListBase(ContainerNode& owner_node,
NodeListSearchRoot search_root,
NodeListInvalidationType invalidation_type,
CollectionType collection_type)
: owner_node_(owner_node),
search_root_(static_cast<unsigned>(search_root)),
invalidation_type_(invalidation_type),
collection_type_(collection_type) {
DCHECK_EQ(search_root_, static_cast<unsigned>(search_root));
DCHECK_EQ(invalidation_type_, static_cast<unsigned>(invalidation_type));
DCHECK_EQ(collection_type_, static_cast<unsigned>(collection_type));
}
virtual ~LiveNodeListBase() = default;
ContainerNode& RootNode() const;
void DidMoveToDocument(Document& old_document, Document& new_document);
ALWAYS_INLINE bool IsRootedAtTreeScope() const {
return search_root_ ==
static_cast<unsigned>(NodeListSearchRoot::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&);
void Trace(Visitor* visitor) const override { visitor->Trace(owner_node_); }
protected:
Document& GetDocument() const { return owner_node_->GetDocument(); }
ALWAYS_INLINE NodeListSearchRoot SearchRoot() const {
return static_cast<NodeListSearchRoot>(search_root_);
}
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);
private:
Member<ContainerNode> owner_node_; // Cannot be null.
const unsigned search_root_ : 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 == html_names::kClassAttr;
case kInvalidateOnNameAttrChange:
return attr_name == html_names::kNameAttr;
case kInvalidateOnIdNameAttrChange:
return attr_name == html_names::kIdAttr ||
attr_name == html_names::kNameAttr;
case kInvalidateOnForAttrChange:
return attr_name == html_names::kForAttr;
case kInvalidateForFormControls:
return attr_name == html_names::kNameAttr ||
attr_name == html_names::kIdAttr ||
attr_name == html_names::kForAttr ||
attr_name == html_names::kFormAttr ||
attr_name == html_names::kTypeAttr;
case kInvalidateOnHRefAttrChange:
return attr_name == html_names::kHrefAttr;
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 // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_LIVE_NODE_LIST_BASE_H_
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