156 lines
5.5 KiB
C++
156 lines
5.5 KiB
C++
/*
|
|
* Copyright (C) 2015 Apple 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:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "RenderTreeUpdater.h"
|
|
#include "ShadowRoot.h"
|
|
#include <wtf/HashMap.h>
|
|
#include <wtf/HashSet.h>
|
|
#include <wtf/Vector.h>
|
|
#include <wtf/WeakPtr.h>
|
|
#include <wtf/text/AtomString.h>
|
|
#include <wtf/text/AtomStringHash.h>
|
|
|
|
namespace WebCore {
|
|
|
|
class Element;
|
|
class HTMLSlotElement;
|
|
class Node;
|
|
|
|
class SlotAssignment {
|
|
WTF_MAKE_NONCOPYABLE(SlotAssignment); WTF_MAKE_FAST_ALLOCATED;
|
|
public:
|
|
SlotAssignment();
|
|
virtual ~SlotAssignment();
|
|
|
|
static const AtomString& defaultSlotName() { return emptyAtom(); }
|
|
|
|
HTMLSlotElement* findAssignedSlot(const Node&, ShadowRoot&);
|
|
|
|
void renameSlotElement(HTMLSlotElement&, const AtomString& oldName, const AtomString& newName, ShadowRoot&);
|
|
void addSlotElementByName(const AtomString&, HTMLSlotElement&, ShadowRoot&);
|
|
void removeSlotElementByName(const AtomString&, HTMLSlotElement&, ContainerNode* oldParentOfRemovedTreeForRemoval, ShadowRoot&);
|
|
void slotFallbackDidChange(HTMLSlotElement&, ShadowRoot&);
|
|
void resolveSlotsBeforeNodeInsertionOrRemoval(ShadowRoot&);
|
|
void willRemoveAllChildren(ShadowRoot&);
|
|
|
|
void didChangeSlot(const AtomString&, ShadowRoot&);
|
|
|
|
const Vector<WeakPtr<Node>>* assignedNodesForSlot(const HTMLSlotElement&, ShadowRoot&);
|
|
void willRemoveAssignedNode(const Node&);
|
|
|
|
virtual void hostChildElementDidChange(const Element&, ShadowRoot&);
|
|
|
|
private:
|
|
struct Slot {
|
|
WTF_MAKE_FAST_ALLOCATED;
|
|
public:
|
|
Slot() { }
|
|
|
|
bool hasSlotElements() { return !!elementCount; }
|
|
bool hasDuplicatedSlotElements() { return elementCount > 1; }
|
|
bool shouldResolveSlotElement() { return !element && elementCount; }
|
|
|
|
WeakPtr<HTMLSlotElement> element;
|
|
WeakPtr<HTMLSlotElement> oldElement;
|
|
unsigned elementCount { 0 };
|
|
bool seenFirstElement { false };
|
|
Vector<WeakPtr<Node>> assignedNodes;
|
|
};
|
|
|
|
bool hasAssignedNodes(ShadowRoot&, Slot&);
|
|
enum class SlotMutationType { Insertion, Removal };
|
|
void resolveSlotsAfterSlotMutation(ShadowRoot&, SlotMutationType, ContainerNode* oldParentOfRemovedTree = nullptr);
|
|
|
|
virtual const AtomString& slotNameForHostChild(const Node&) const;
|
|
|
|
HTMLSlotElement* findFirstSlotElement(Slot&, ShadowRoot&);
|
|
void resolveAllSlotElements(ShadowRoot&);
|
|
|
|
void assignSlots(ShadowRoot&);
|
|
void assignToSlot(Node& child, const AtomString& slotName);
|
|
|
|
HashMap<AtomString, std::unique_ptr<Slot>> m_slots;
|
|
|
|
#if ASSERT_ENABLED
|
|
HashSet<HTMLSlotElement*> m_slotElementsForConsistencyCheck;
|
|
#endif
|
|
|
|
bool m_needsToResolveSlotElements { false };
|
|
bool m_slotAssignmentsIsValid { false };
|
|
bool m_willBeRemovingAllChildren { false };
|
|
unsigned m_slotMutationVersion { 0 };
|
|
unsigned m_slotResolutionVersion { 0 };
|
|
unsigned m_slotElementCount { 0 };
|
|
};
|
|
|
|
inline void ShadowRoot::resolveSlotsBeforeNodeInsertionOrRemoval()
|
|
{
|
|
if (UNLIKELY(shouldFireSlotchangeEvent() && m_slotAssignment))
|
|
m_slotAssignment->resolveSlotsBeforeNodeInsertionOrRemoval(*this);
|
|
}
|
|
|
|
inline void ShadowRoot::willRemoveAllChildren(ContainerNode&)
|
|
{
|
|
if (UNLIKELY(shouldFireSlotchangeEvent() && m_slotAssignment))
|
|
m_slotAssignment->willRemoveAllChildren(*this);
|
|
}
|
|
|
|
inline void ShadowRoot::didRemoveAllChildrenOfShadowHost()
|
|
{
|
|
if (m_slotAssignment) // FIXME: This is incorrect when there were no elements or text nodes removed.
|
|
m_slotAssignment->didChangeSlot(nullAtom(), *this);
|
|
}
|
|
|
|
inline void ShadowRoot::didChangeDefaultSlot()
|
|
{
|
|
if (m_slotAssignment)
|
|
m_slotAssignment->didChangeSlot(nullAtom(), *this);
|
|
}
|
|
|
|
inline void ShadowRoot::hostChildElementDidChange(const Element& childElement)
|
|
{
|
|
if (m_slotAssignment)
|
|
m_slotAssignment->hostChildElementDidChange(childElement, *this);
|
|
}
|
|
|
|
inline void ShadowRoot::hostChildElementDidChangeSlotAttribute(Element& element, const AtomString& oldValue, const AtomString& newValue)
|
|
{
|
|
if (!m_slotAssignment)
|
|
return;
|
|
m_slotAssignment->didChangeSlot(oldValue, *this);
|
|
m_slotAssignment->didChangeSlot(newValue, *this);
|
|
RenderTreeUpdater::tearDownRenderers(element);
|
|
}
|
|
|
|
inline void ShadowRoot::willRemoveAssignedNode(const Node& node)
|
|
{
|
|
if (m_slotAssignment)
|
|
m_slotAssignment->willRemoveAssignedNode(node);
|
|
}
|
|
|
|
} // namespace WebCore
|