Move v0 things from ShadowRootRareData into ShadowRootRareDataV0

third_party/WebKit/Source/core/dom/shadow/ShadowRoot.cpp

 /*
  * 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
@@ skipping 18 matching lines @@
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/css/StyleSheetList.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/css/resolver/StyleSharingDepthScope.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/StyleEngine.h"
 #include "core/dom/Text.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/InsertionPoint.h"
 #include "core/dom/shadow/ShadowRootRareData.h"
+#include "core/dom/shadow/ShadowRootRareDataV0.h"
 #include "core/editing/serializers/Serialization.h"
 #include "core/html/HTMLShadowElement.h"
 #include "public/platform/Platform.h"
 
 namespace blink {
 
 struct SameSizeAsShadowRoot : public DocumentFragment, public TreeScope, public DoublyLinkedListNode<ShadowRoot> {
     char emptyClassFieldsDueToGCMixinMarker[1];
-    Member<void*> willbeMember[4];
+    Member<void*> willbeMember[5];
     unsigned countersAndFlags[1];
 };
 
 static_assert(sizeof(ShadowRoot) == sizeof(SameSizeAsShadowRoot), "ShadowRoot should stay small");
 
 ShadowRoot::ShadowRoot(Document& document, ShadowRootType type)
     : DocumentFragment(0, CreateShadowRoot)
     , TreeScope(*this, document)
     , m_prev(nullptr)
     , m_next(nullptr)
@@ skipping 129 matching lines @@
 
 ShadowRootRareData* ShadowRoot::ensureShadowRootRareData()
 {
     if (m_shadowRootRareData)
         return m_shadowRootRareData.get();
 
     m_shadowRootRareData = new ShadowRootRareData;
     return m_shadowRootRareData.get();
 }
 
+ShadowRootRareDataV0* ShadowRoot::ensureShadowRootRareDataV0()
+{
+    if (m_shadowRootRareDataV0)
+        return m_shadowRootRareDataV0.get();
+
+    m_shadowRootRareDataV0 = new ShadowRootRareDataV0;
+    return m_shadowRootRareDataV0.get();
+}
+
 bool ShadowRoot::containsShadowElements() const
 {
-    return m_shadowRootRareData ? m_shadowRootRareData->containsShadowElements() : 0;
+    return m_shadowRootRareDataV0 ? m_shadowRootRareDataV0->containsShadowElements() : false;
 }
 
 bool ShadowRoot::containsContentElements() const
 {
-    return m_shadowRootRareData ? m_shadowRootRareData->containsContentElements() : 0;
+    return m_shadowRootRareDataV0 ? m_shadowRootRareDataV0->containsContentElements() : false;
 }
 
 bool ShadowRoot::containsShadowRoots() const
 {
-    return m_shadowRootRareData ? m_shadowRootRareData->containsShadowRoots() : 0;
+    return m_shadowRootRareData ? m_shadowRootRareData->containsShadowRoots() : false;
 }
 
 unsigned ShadowRoot::descendantShadowElementCount() const
 {
-    return m_shadowRootRareData ? m_shadowRootRareData->descendantShadowElementCount() : 0;
+    return m_shadowRootRareDataV0 ? m_shadowRootRareDataV0->descendantShadowElementCount() : 0;
 }
 
 HTMLShadowElement* ShadowRoot::shadowInsertionPointOfYoungerShadowRoot() const
 {
-    return m_shadowRootRareData ? m_shadowRootRareData->shadowInsertionPointOfYoungerShadowRoot() : 0;
+    return m_shadowRootRareDataV0 ? m_shadowRootRareDataV0->shadowInsertionPointOfYoungerShadowRoot() : nullptr;
 }
 
 void ShadowRoot::setShadowInsertionPointOfYoungerShadowRoot(HTMLShadowElement* shadowInsertionPoint)
 {
-    if (!m_shadowRootRareData && !shadowInsertionPoint)
+    if (!m_shadowRootRareDataV0 && !shadowInsertionPoint)
         return;
-    ensureShadowRootRareData()->setShadowInsertionPointOfYoungerShadowRoot(shadowInsertionPoint);
+    ensureShadowRootRareDataV0()->setShadowInsertionPointOfYoungerShadowRoot(shadowInsertionPoint);
 }
 
 void ShadowRoot::didAddInsertionPoint(InsertionPoint* insertionPoint)
 {
-    ensureShadowRootRareData()->didAddInsertionPoint(insertionPoint);
+    ensureShadowRootRareDataV0()->didAddInsertionPoint(insertionPoint);
     invalidateDescendantInsertionPoints();
 }
 
 void ShadowRoot::didRemoveInsertionPoint(InsertionPoint* insertionPoint)
 {
-    m_shadowRootRareData->didRemoveInsertionPoint(insertionPoint);
+    m_shadowRootRareDataV0->didRemoveInsertionPoint(insertionPoint);
     invalidateDescendantInsertionPoints();
 }
 
 void ShadowRoot::addChildShadowRoot()
 {
     ensureShadowRootRareData()->didAddChildShadowRoot();
 }
 
 void ShadowRoot::removeChildShadowRoot()
 {
     // FIXME: Why isn't this an ASSERT?
     if (!m_shadowRootRareData)
         return;
     m_shadowRootRareData->didRemoveChildShadowRoot();
 }
 
 unsigned ShadowRoot::childShadowRootCount() const
 {
     return m_shadowRootRareData ? m_shadowRootRareData->childShadowRootCount() : 0;
 }
 
 void ShadowRoot::invalidateDescendantInsertionPoints()
 {
     m_descendantInsertionPointsIsValid = false;
-    m_shadowRootRareData->clearDescendantInsertionPoints();
+    m_shadowRootRareDataV0->clearDescendantInsertionPoints();
 }
 
 const HeapVector<Member<InsertionPoint>>& ShadowRoot::descendantInsertionPoints()
 {
     DEFINE_STATIC_LOCAL(HeapVector<Member<InsertionPoint>>, emptyList, (new HeapVector<Member<InsertionPoint>>));
-    if (m_shadowRootRareData && m_descendantInsertionPointsIsValid)
-        return m_shadowRootRareData->descendantInsertionPoints();
+    if (m_shadowRootRareDataV0 && m_descendantInsertionPointsIsValid)
+        return m_shadowRootRareDataV0->descendantInsertionPoints();
 
     m_descendantInsertionPointsIsValid = true;
 
     if (!containsInsertionPoints())
         return emptyList;
 
     HeapVector<Member<InsertionPoint>> insertionPoints;
     for (InsertionPoint& insertionPoint : Traversal<InsertionPoint>::descendantsOf(*this))
         insertionPoints.append(&insertionPoint);
 
-    ensureShadowRootRareData()->setDescendantInsertionPoints(insertionPoints);
+    ensureShadowRootRareDataV0()->setDescendantInsertionPoints(insertionPoints);
 
-    return m_shadowRootRareData->descendantInsertionPoints();
+    return m_shadowRootRareDataV0->descendantInsertionPoints();
 }
 
 StyleSheetList* ShadowRoot::styleSheets()
 {
     if (!ensureShadowRootRareData()->styleSheets())
         m_shadowRootRareData->setStyleSheets(StyleSheetList::create(this));
 
     return m_shadowRootRareData->styleSheets();
 }
 
@@ skipping 46 matching lines @@
     if (!m_slotAssignment)
         m_slotAssignment = SlotAssignment::create();
     m_slotAssignment->resolveAssignment(*this);
 }
 
 DEFINE_TRACE(ShadowRoot)
 {
     visitor->trace(m_prev);
     visitor->trace(m_next);
     visitor->trace(m_shadowRootRareData);
+    visitor->trace(m_shadowRootRareDataV0);
     visitor->trace(m_slotAssignment);
     TreeScope::trace(visitor);
     DocumentFragment::trace(visitor);
 }
 
 } // namespace blink