third_party/WebKit/Source/core/dom/NodeRareData.h

   1 /*
   2  * Copyright (C) 2008, 2010 Apple Inc. All rights reserved.
   3  * Copyright (C) 2008 David Smith <catfish.man@gmail.com>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #ifndef NodeRareData_h
  23 #define NodeRareData_h
  24
  25 #include "core/dom/MutationObserverRegistration.h"
  26 #include "core/dom/NodeListsNodeData.h"
  27 #include "platform/heap/Handle.h"
  28 #include "wtf/HashSet.h"
  29 #include "wtf/OwnPtr.h"
  30 #include "wtf/PassOwnPtr.h"
  31
  32 namespace blink {
  33
  34 class NodeMutationObserverData final : public NoBaseWillBeGarbageCollected<NodeMutationObserverData> {
  35     WTF_MAKE_NONCOPYABLE(NodeMutationObserverData);
  36     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(NodeMutationObserverData);
  37 public:
  38     WillBeHeapVector<OwnPtrWillBeMember<MutationObserverRegistration>> registry;
  39     WillBeHeapHashSet<RawPtrWillBeMember<MutationObserverRegistration>> transientRegistry;
  40
  41     static PassOwnPtrWillBeRawPtr<NodeMutationObserverData> create()
  42     {
  43         return adoptPtrWillBeNoop(new NodeMutationObserverData);
  44     }
  45
  46     DEFINE_INLINE_TRACE()
  47     {
  48 #if ENABLE(OILPAN)
  49         visitor->trace(registry);
  50         visitor->trace(transientRegistry);
  51 #endif
  52     }
  53
  54 private:
  55     NodeMutationObserverData() { }
  56 };
  57
  58 class NodeRareData : public NoBaseWillBeGarbageCollectedFinalized<NodeRareData>, public NodeRareDataBase {
  59     WTF_MAKE_NONCOPYABLE(NodeRareData);
  60     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(NodeRareData);
  61 public:
  62     static NodeRareData* create(LayoutObject* layoutObject)
  63     {
  64         return new NodeRareData(layoutObject);
  65     }
  66
  67     void clearNodeLists() { m_nodeLists.clear(); }
  68     NodeListsNodeData* nodeLists() const { return m_nodeLists.get(); }
  69     NodeListsNodeData& ensureNodeLists()
  70     {
  71         if (!m_nodeLists)
  72             m_nodeLists = NodeListsNodeData::create();
  73         return *m_nodeLists;
  74     }
  75
  76     NodeMutationObserverData* mutationObserverData() { return m_mutationObserverData.get(); }
  77     NodeMutationObserverData& ensureMutationObserverData()
  78     {
  79         if (!m_mutationObserverData)
  80             m_mutationObserverData = NodeMutationObserverData::create();
  81         return *m_mutationObserverData;
  82     }
  83
  84     unsigned connectedSubframeCount() const { return m_connectedFrameCount; }
  85     void incrementConnectedSubframeCount(unsigned amount);
  86     void decrementConnectedSubframeCount(unsigned amount)
  87     {
  88         ASSERT(m_connectedFrameCount);
  89         ASSERT(amount <= m_connectedFrameCount);
  90         m_connectedFrameCount -= amount;
  91     }
  92
  93     bool hasElementFlag(ElementFlags mask) const { return m_elementFlags & mask; }
  94     void setElementFlag(ElementFlags mask, bool value) { m_elementFlags = (m_elementFlags & ~mask) | (-(int32_t)value & mask); }
  95     void clearElementFlag(ElementFlags mask) { m_elementFlags &= ~mask; }
  96
  97     bool hasRestyleFlag(DynamicRestyleFlags mask) const { return m_restyleFlags & mask; }
  98     void setRestyleFlag(DynamicRestyleFlags mask) { m_restyleFlags |= mask; RELEASE_ASSERT(m_restyleFlags); }
  99     bool hasRestyleFlags() const { return m_restyleFlags; }
 100     void clearRestyleFlags() { m_restyleFlags = 0; }
 101
 102     enum {
 103         ConnectedFrameCountBits = 10, // Must fit Page::maxNumberOfFrames.
 104     };
 105
 106     DECLARE_TRACE();
 107
 108     DECLARE_TRACE_AFTER_DISPATCH();
 109     void finalizeGarbageCollectedObject();
 110
 111 protected:
 112     explicit NodeRareData(LayoutObject* layoutObject)
 113         : NodeRareDataBase(layoutObject)
 114         , m_connectedFrameCount(0)
 115         , m_elementFlags(0)
 116         , m_restyleFlags(0)
 117         , m_isElementRareData(false)
 118     { }
 119
 120 private:
 121     OwnPtrWillBeMember<NodeListsNodeData> m_nodeLists;
 122     OwnPtrWillBeMember<NodeMutationObserverData> m_mutationObserverData;
 123
 124     unsigned m_connectedFrameCount : ConnectedFrameCountBits;
 125     unsigned m_elementFlags : NumberOfElementFlags;
 126     unsigned m_restyleFlags : NumberOfDynamicRestyleFlags;
 127 protected:
 128     unsigned m_isElementRareData : 1;
 129 };
 130
 131 } // namespace blink
 132
 133 #endif // NodeRareData_h