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/*
* Copyright (C) 2008, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2008 David Smith <catfish.man@gmail.com>
*
* 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 NodeRareData_h
#define NodeRareData_h
#include "bindings/core/v8/TraceWrapperMember.h"
#include "core/dom/MutationObserverRegistration.h"
#include "core/dom/NodeListsNodeData.h"
#include "platform/heap/Handle.h"
#include "wtf/HashSet.h"
namespace blink {
class NodeMutationObserverData final
: public GarbageCollected<NodeMutationObserverData> {
WTF_MAKE_NONCOPYABLE(NodeMutationObserverData);
public:
static NodeMutationObserverData* create() {
return new NodeMutationObserverData;
}
const HeapVector<TraceWrapperMember<MutationObserverRegistration>>&
registry() {
return m_registry;
}
const HeapHashSet<TraceWrapperMember<MutationObserverRegistration>>&
transientRegistry() {
return m_transientRegistry;
}
void addTransientRegistration(MutationObserverRegistration* registration) {
m_transientRegistry.add(
TraceWrapperMember<MutationObserverRegistration>(this, registration));
}
void removeTransientRegistration(MutationObserverRegistration* registration) {
DCHECK(m_transientRegistry.contains(registration));
m_transientRegistry.remove(registration);
}
void addRegistration(MutationObserverRegistration* registration) {
m_registry.push_back(
TraceWrapperMember<MutationObserverRegistration>(this, registration));
}
void removeRegistration(MutationObserverRegistration* registration) {
DCHECK(m_registry.contains(registration));
m_registry.remove(m_registry.find(registration));
}
DEFINE_INLINE_TRACE() {
visitor->trace(m_registry);
visitor->trace(m_transientRegistry);
}
DECLARE_TRACE_WRAPPERS() {
for (auto registration : m_registry) {
visitor->traceWrappers(registration);
}
for (auto registration : m_transientRegistry) {
visitor->traceWrappers(registration);
}
}
private:
NodeMutationObserverData() {}
HeapVector<TraceWrapperMember<MutationObserverRegistration>> m_registry;
HeapHashSet<TraceWrapperMember<MutationObserverRegistration>>
m_transientRegistry;
};
class NodeRareData : public GarbageCollectedFinalized<NodeRareData>,
public NodeRareDataBase {
WTF_MAKE_NONCOPYABLE(NodeRareData);
public:
static NodeRareData* create(LayoutObject* layoutObject) {
return new NodeRareData(layoutObject);
}
void clearNodeLists() { m_nodeLists.clear(); }
NodeListsNodeData* nodeLists() const { return m_nodeLists.get(); }
// ensureNodeLists() and a following NodeListsNodeData functions must be
// wrapped with a ThreadState::GCForbiddenScope in order to avoid an
// initialized m_nodeLists is cleared by NodeRareData::traceAfterDispatch().
NodeListsNodeData& ensureNodeLists() {
DCHECK(ThreadState::current()->isGCForbidden());
if (!m_nodeLists) {
m_nodeLists = NodeListsNodeData::create();
ScriptWrappableVisitor::writeBarrier(this, m_nodeLists);
}
return *m_nodeLists;
}
NodeMutationObserverData* mutationObserverData() {
return m_mutationObserverData.get();
}
NodeMutationObserverData& ensureMutationObserverData() {
if (!m_mutationObserverData) {
m_mutationObserverData = NodeMutationObserverData::create();
ScriptWrappableVisitor::writeBarrier(this, m_mutationObserverData);
}
return *m_mutationObserverData;
}
unsigned connectedSubframeCount() const { return m_connectedFrameCount; }
void incrementConnectedSubframeCount();
void decrementConnectedSubframeCount() {
DCHECK(m_connectedFrameCount);
--m_connectedFrameCount;
}
bool hasElementFlag(ElementFlags mask) const { return m_elementFlags & mask; }
void setElementFlag(ElementFlags mask, bool value) {
m_elementFlags = (m_elementFlags & ~mask) | (-(int32_t)value & mask);
}
void clearElementFlag(ElementFlags mask) { m_elementFlags &= ~mask; }
bool hasRestyleFlag(DynamicRestyleFlags mask) const {
return m_restyleFlags & mask;
}
void setRestyleFlag(DynamicRestyleFlags mask) {
m_restyleFlags |= mask;
RELEASE_ASSERT(m_restyleFlags);
}
bool hasRestyleFlags() const { return m_restyleFlags; }
void clearRestyleFlags() { m_restyleFlags = 0; }
enum {
ConnectedFrameCountBits = 10, // Must fit Page::maxNumberOfFrames.
};
DECLARE_TRACE();
DECLARE_TRACE_AFTER_DISPATCH();
void finalizeGarbageCollectedObject();
DECLARE_TRACE_WRAPPERS();
DECLARE_TRACE_WRAPPERS_AFTER_DISPATCH();
protected:
explicit NodeRareData(LayoutObject* layoutObject)
: NodeRareDataBase(layoutObject),
m_connectedFrameCount(0),
m_elementFlags(0),
m_restyleFlags(0),
m_isElementRareData(false) {}
private:
Member<NodeListsNodeData> m_nodeLists;
Member<NodeMutationObserverData> m_mutationObserverData;
unsigned m_connectedFrameCount : ConnectedFrameCountBits;
unsigned m_elementFlags : NumberOfElementFlags;
unsigned m_restyleFlags : NumberOfDynamicRestyleFlags;
protected:
unsigned m_isElementRareData : 1;
};
} // namespace blink
#endif // NodeRareData_h
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