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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) 2004-2018 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.
*
*/
#pragma once
#include <WebCore/Node.h>
namespace WebCore {
class HTMLCollection;
class RadioNodeList;
class RenderElement;
struct SerializedNode;
enum class CollectionType : uint8_t;
class ContainerNode : public Node {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(ContainerNode);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(ContainerNode);
public:
virtual ~ContainerNode();
Node* firstChild() const { return m_firstChild.get(); }
RefPtr<Node> protectedFirstChild() const { return m_firstChild.get(); }
static constexpr ptrdiff_t firstChildMemoryOffset() { return OBJECT_OFFSETOF(ContainerNode, m_firstChild); }
Node* lastChild() const { return m_lastChild.get(); }
RefPtr<Node> protectedLastChild() const { return m_lastChild.get(); }
static constexpr ptrdiff_t lastChildMemoryOffset() { return OBJECT_OFFSETOF(ContainerNode, m_lastChild); }
bool hasChildNodes() const { return m_firstChild.get(); }
bool hasOneChild() const { return m_firstChild && m_firstChild == m_lastChild; }
bool directChildNeedsStyleRecalc() const { return hasStyleFlag(NodeStyleFlag::DirectChildNeedsStyleResolution); }
void setDirectChildNeedsStyleRecalc() { setStyleFlag(NodeStyleFlag::DirectChildNeedsStyleResolution); }
WEBCORE_EXPORT unsigned countChildNodes() const;
WEBCORE_EXPORT Node* traverseToChildAt(unsigned) const;
ExceptionOr<void> insertBefore(Node& newChild, RefPtr<Node>&& refChild);
ExceptionOr<void> replaceChild(Node& newChild, Node& oldChild);
WEBCORE_EXPORT ExceptionOr<void> removeChild(Node& child);
WEBCORE_EXPORT ExceptionOr<void> appendChild(Node& newChild);
void stringReplaceAll(String&&);
void replaceAll(Node*);
inline ContainerNode& rootNode() const; // Defined in ContainerNodeInlines.h
inline Ref<ContainerNode> protectedRootNode() const; // Defined in ContainerNodeInlines.h
ContainerNode& traverseToRootNode() const;
// These methods are only used during parsing.
// They don't send DOM mutation events or handle reparenting.
// However, arbitrary code may be run by beforeload handlers.
void parserAppendChild(Node&);
void parserAppendChildIntoIsolatedTree(Node&);
void parserNotifyChildrenChanged();
void parserRemoveChild(Node&);
void parserInsertBefore(Node& newChild, Node& refChild);
WEBCORE_EXPORT void removeChildren();
void takeAllChildrenFrom(ContainerNode*);
void cloneChildNodes(Document&, CustomElementRegistry*, ContainerNode& clone, size_t currentDepth = 0) const;
Vector<SerializedNode> serializeChildNodes(size_t currentDepth = 0) const;
enum class CanDelayNodeDeletion : uint8_t { No, Yes, Unknown };
struct ChildChange {
enum class Type : uint8_t { ElementInserted, ElementRemoved, TextInserted, TextRemoved, TextChanged, AllChildrenRemoved, NonContentsChildRemoved, NonContentsChildInserted, AllChildrenReplaced };
enum class Source : uint8_t { Parser, API, Clone };
enum class AffectsElements : uint8_t { Unknown, No, Yes };
ChildChange::Type type;
// Making these raw pointers RefPtr leads to a Speedometer 3 regression.
SUPPRESS_UNCOUNTED_MEMBER Element* siblingChanged;
SUPPRESS_UNCOUNTED_MEMBER Element* previousSiblingElement;
SUPPRESS_UNCOUNTED_MEMBER Element* nextSiblingElement;
ChildChange::Source source;
AffectsElements affectsElements;
bool isInsertion() const
{
switch (type) {
case ChildChange::Type::ElementInserted:
case ChildChange::Type::TextInserted:
case ChildChange::Type::NonContentsChildInserted:
case ChildChange::Type::AllChildrenReplaced:
return true;
case ChildChange::Type::ElementRemoved:
case ChildChange::Type::TextRemoved:
case ChildChange::Type::TextChanged:
case ChildChange::Type::AllChildrenRemoved:
case ChildChange::Type::NonContentsChildRemoved:
return false;
}
ASSERT_NOT_REACHED();
return false;
}
};
virtual void childrenChanged(const ChildChange&);
ExceptionOr<void> appendChild(ChildChange::Source, Node& newChild);
void disconnectDescendantFrames();
inline RenderElement* renderer() const; // Defined in ContainerNodeInlines.h.
inline CheckedPtr<RenderElement> checkedRenderer() const; // Defined in ContainerNodeInlines.h.
// Return a bounding box in absolute coordinates enclosing this node and all its descendants.
// This gives the area within which events may get handled by a hander registered on this node.
virtual LayoutRect absoluteEventHandlerBounds(bool& /* includesFixedPositionElements */);
WEBCORE_EXPORT ExceptionOr<Element*> querySelector(const String& selectors);
WEBCORE_EXPORT ExceptionOr<Ref<NodeList>> querySelectorAll(const String& selectors);
WEBCORE_EXPORT Ref<HTMLCollection> getElementsByTagName(const AtomString&);
WEBCORE_EXPORT Ref<HTMLCollection> getElementsByTagNameNS(const AtomString& namespaceURI, const AtomString& localName);
WEBCORE_EXPORT Ref<HTMLCollection> getElementsByClassName(const AtomString& classNames);
Ref<RadioNodeList> radioNodeList(const AtomString&);
// From the ParentNode interface - https://dom.spec.whatwg.org/#interface-parentnode
WEBCORE_EXPORT Ref<HTMLCollection> children();
WEBCORE_EXPORT Element* firstElementChild() const;
WEBCORE_EXPORT Element* lastElementChild() const;
WEBCORE_EXPORT unsigned childElementCount() const;
ExceptionOr<void> append(FixedVector<NodeOrString>&&);
ExceptionOr<void> prepend(FixedVector<NodeOrString>&&);
ExceptionOr<void> replaceChildren(FixedVector<NodeOrString>&&);
ExceptionOr<void> ensurePreInsertionValidity(Node& newChild, Node* refChild);
ExceptionOr<void> ensurePreInsertionValidityForPhantomDocumentFragment(NodeVector& newChildren, Node* refChild = nullptr);
ExceptionOr<void> insertChildrenBeforeWithoutPreInsertionValidityCheck(NodeVector&&, Node* nextChild = nullptr);
protected:
explicit ContainerNode(Document&, NodeType, OptionSet<TypeFlag> = { });
friend void removeDetachedChildrenInContainer(ContainerNode&);
void removeDetachedChildren();
void setFirstChild(Node* child) { m_firstChild = child; }
void setLastChild(Node* child) { m_lastChild = child; }
HTMLCollection* cachedHTMLCollection(CollectionType);
private:
friend struct SerializedNode;
void executePreparedChildrenRemoval();
enum class DeferChildrenChanged : bool { No, Yes };
enum class DidRemoveElements : bool { No, Yes };
struct RemoveAllChildrenResult {
unsigned subTreeSize;
DidRemoveElements didRemoveElements;
CanDelayNodeDeletion canBeDelayed;
};
RemoveAllChildrenResult removeAllChildrenWithScriptAssertionMaybeAsync(ChildChange::Source, NodeVector& children, DeferChildrenChanged = DeferChildrenChanged::No);
RemoveAllChildrenResult removeAllChildrenWithScriptAssertion(ChildChange::Source, NodeVector& children, DeferChildrenChanged = DeferChildrenChanged::No);
bool removeNodeWithScriptAssertion(Node&, ChildChange::Source);
ExceptionOr<void> removeSelfOrChildNodesForInsertion(Node&, NodeVector&);
void removeBetween(Node* previousChild, Node* nextChild, Node& oldChild);
ExceptionOr<void> appendChildWithoutPreInsertionValidityCheck(Node&);
void insertBeforeCommon(Node& nextChild, Node& oldChild);
void appendChildCommon(Node&);
void rebuildSVGExtensionsElementsIfNecessary();
bool isContainerNode() const = delete;
CheckedPtr<Node> m_firstChild;
CheckedPtr<Node> m_lastChild;
};
inline ContainerNode::ContainerNode(Document& document, NodeType type, OptionSet<TypeFlag> typeFlags)
: Node(document, type, typeFlags | TypeFlag::IsContainerNode)
{
ASSERT(!isCharacterDataNode());
}
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ContainerNode)
static bool isType(const WebCore::Node& node) { return node.isContainerNode(); }
SPECIALIZE_TYPE_TRAITS_END()
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