Simplify tree scope tracking in StyleEngine.

sky/engine/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 11 matching lines @@
  * 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.
  */
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/dom/shadow/ShadowRoot.h"
 
 #include "sky/engine/bindings/core/v8/ExceptionState.h"
 #include "sky/engine/core/css/resolver/StyleResolver.h"
+#include "sky/engine/core/dom/Document.h"
 #include "sky/engine/core/dom/ElementTraversal.h"
 #include "sky/engine/core/dom/StyleEngine.h"
 #include "sky/engine/core/dom/Text.h"
 #include "sky/engine/core/dom/shadow/ElementShadow.h"
 #include "sky/engine/core/dom/shadow/InsertionPoint.h"
 #include "sky/engine/core/dom/shadow/ShadowRootRareData.h"
 #include "sky/engine/public/platform/Platform.h"
 
 namespace blink {
 
@@ skipping 63 matching lines @@
         }
     }
 
     clearChildNeedsStyleRecalc();
 }
 
 void ShadowRoot::insertedInto(ContainerNode* insertionPoint)
 {
     DocumentFragment::insertedInto(insertionPoint);
 
+    if (inActiveDocument())
+        document().styleEngine()->addTreeScope(*this);
+
     if (ShadowRoot* root = host()->containingShadowRoot())
         root->addChildShadowRoot();
 }
 
 void ShadowRoot::removedFrom(ContainerNode* insertionPoint)
 {
     ShadowRoot* root = host()->containingShadowRoot();
     if (!root)
         root = insertionPoint->containingShadowRoot();
     if (root)
         root->removeChildShadowRoot();
 
+    if (inActiveDocument())
+        document().styleEngine()->removeTreeScope(*this);
+
     DocumentFragment::removedFrom(insertionPoint);
 }
 
 ShadowRootRareData* ShadowRoot::ensureShadowRootRareData()
 {
     if (m_shadowRootRareData)
         return m_shadowRootRareData.get();
 
     m_shadowRootRareData = adoptPtr(new ShadowRootRareData);
     return m_shadowRootRareData.get();
@@ skipping 59 matching lines @@
     Vector<RefPtr<InsertionPoint> > insertionPoints;
     for (InsertionPoint* insertionPoint = Traversal<InsertionPoint>::firstWithin(*this); insertionPoint; insertionPoint = Traversal<InsertionPoint>::next(*insertionPoint, this))
         insertionPoints.append(insertionPoint);
 
     ensureShadowRootRareData()->setDescendantInsertionPoints(insertionPoints);
 
     return m_shadowRootRareData->descendantInsertionPoints();
 }
 
 }