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/*
* Copyright (C) 2011 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.
* * 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.
*/
#pragma once
#include "Document.h"
#include "DocumentFragment.h"
#include "Element.h"
#include "StyleScopeOrdinal.h"
#if ENABLE(PICTURE_IN_PICTURE_API)
#include "HTMLVideoElement.h"
#endif
#include "ShadowRootMode.h"
#include <wtf/HashMap.h>
namespace WebCore {
class HTMLSlotElement;
class SlotAssignment;
class StyleSheetList;
class WebAnimation;
class ShadowRoot final : public DocumentFragment, public TreeScope {
WTF_MAKE_ISO_ALLOCATED(ShadowRoot);
public:
enum class DelegatesFocus : uint8_t { Yes, No };
static Ref<ShadowRoot> create(Document& document, ShadowRootMode type, DelegatesFocus delegatesFocus = DelegatesFocus::No)
{
return adoptRef(*new ShadowRoot(document, type, delegatesFocus));
}
static Ref<ShadowRoot> create(Document& document, std::unique_ptr<SlotAssignment>&& assignment)
{
return adoptRef(*new ShadowRoot(document, WTFMove(assignment)));
}
virtual ~ShadowRoot();
using TreeScope::getElementById;
using TreeScope::rootNode;
WEBCORE_EXPORT Style::Scope& styleScope();
StyleSheetList& styleSheets();
bool resetStyleInheritance() const { return m_resetStyleInheritance; }
void setResetStyleInheritance(bool);
bool delegatesFocus() const { return m_delegatesFocus; }
bool containsFocusedElement() const { return m_containsFocusedElement; }
void setContainsFocusedElement(bool flag) { m_containsFocusedElement = flag; }
Element* host() const { return m_host.get(); }
void setHost(WeakPtr<Element>&& host) { m_host = WTFMove(host); }
String innerHTML() const;
ExceptionOr<void> setInnerHTML(const String&);
Element* activeElement() const;
ShadowRootMode mode() const { return m_type; }
bool shouldFireSlotchangeEvent() const { return m_type != ShadowRootMode::UserAgent && !m_hasBegunDeletingDetachedChildren; }
void removeAllEventListeners() override;
HTMLSlotElement* findAssignedSlot(const Node&);
void renameSlotElement(HTMLSlotElement&, const AtomString& oldName, const AtomString& newName);
void addSlotElementByName(const AtomString&, HTMLSlotElement&);
void removeSlotElementByName(const AtomString&, HTMLSlotElement&, ContainerNode& oldParentOfRemovedTree);
void slotFallbackDidChange(HTMLSlotElement&);
void resolveSlotsBeforeNodeInsertionOrRemoval();
void willRemoveAllChildren(ContainerNode&);
void willRemoveAssignedNode(const Node&);
void didRemoveAllChildrenOfShadowHost();
void didChangeDefaultSlot();
void hostChildElementDidChange(const Element&);
void hostChildElementDidChangeSlotAttribute(Element&, const AtomString& oldValue, const AtomString& newValue);
const Vector<WeakPtr<Node>>* assignedNodesForSlot(const HTMLSlotElement&);
void moveShadowRootToNewParentScope(TreeScope&, Document&);
void moveShadowRootToNewDocument(Document&);
using PartMappings = HashMap<AtomString, Vector<AtomString, 1>>;
const PartMappings& partMappings() const;
void invalidatePartMappings();
#if ENABLE(PICTURE_IN_PICTURE_API)
HTMLVideoElement* pictureInPictureElement() const;
#endif
Vector<RefPtr<WebAnimation>> getAnimations();
private:
ShadowRoot(Document&, ShadowRootMode, DelegatesFocus);
ShadowRoot(Document&, std::unique_ptr<SlotAssignment>&&);
bool childTypeAllowed(NodeType) const override;
Ref<Node> cloneNodeInternal(Document&, CloningOperation) override;
Node::InsertedIntoAncestorResult insertedIntoAncestor(InsertionType, ContainerNode&) override;
void removedFromAncestor(RemovalType, ContainerNode& insertionPoint) override;
void childrenChanged(const ChildChange&) override;
bool m_resetStyleInheritance { false };
bool m_hasBegunDeletingDetachedChildren { false };
bool m_delegatesFocus { false };
bool m_containsFocusedElement { false };
ShadowRootMode m_type { ShadowRootMode::UserAgent };
WeakPtr<Element> m_host;
RefPtr<StyleSheetList> m_styleSheetList;
std::unique_ptr<Style::Scope> m_styleScope;
std::unique_ptr<SlotAssignment> m_slotAssignment;
mutable std::optional<PartMappings> m_partMappings;
};
inline Element* ShadowRoot::activeElement() const
{
return treeScope().focusedElementInScope();
}
inline bool Node::isUserAgentShadowRoot() const
{
return isShadowRoot() && downcast<ShadowRoot>(*this).mode() == ShadowRootMode::UserAgent;
}
inline ContainerNode* Node::parentOrShadowHostNode() const
{
ASSERT(isMainThreadOrGCThread());
if (is<ShadowRoot>(*this))
return downcast<ShadowRoot>(*this).host();
return parentNode();
}
inline bool hasShadowRootParent(const Node& node)
{
return node.parentNode() && node.parentNode()->isShadowRoot();
}
Vector<ShadowRoot*> assignedShadowRootsIfSlotted(const Node&);
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ShadowRoot)
static bool isType(const WebCore::Node& node) { return node.isShadowRoot(); }
SPECIALIZE_TYPE_TRAITS_END()
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