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f0599689e6
In Sky most elements with a ShadowRoot will have rare data since they'll have elements inside them with more ShadowRoots which would increment the m_childShadowRootCount field, or they'll contain a <content> element which would increment m_descendantContentElementCount. Only leaf elements that don't contain either will not get one, and everyone pays the price for the rare data ptr. This should be mostly net netural for memory usage and it makes the code simpler. We can add it back later if we realize there's lots of leaf widgets. R=abarth@chromium.org Review URL: https://codereview.chromium.org/862183003
108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright (C) 2011 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_DOM_SHADOW_SHADOWROOT_H_
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#define SKY_ENGINE_CORE_DOM_SHADOW_SHADOWROOT_H_
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#include "sky/engine/core/dom/ContainerNode.h"
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#include "sky/engine/core/dom/DocumentFragment.h"
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#include "sky/engine/core/dom/Element.h"
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#include "sky/engine/core/dom/TreeScope.h"
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namespace blink {
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class Document;
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class ElementShadow;
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class ExceptionState;
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class InsertionPoint;
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class ShadowRoot final : public DocumentFragment, public TreeScope {
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DEFINE_WRAPPERTYPEINFO();
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public:
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static PassRefPtr<ShadowRoot> create(Document& document)
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{
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return adoptRef(new ShadowRoot(document));
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}
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void recalcStyle(StyleRecalcChange);
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// Disambiguate between Node and TreeScope hierarchies; TreeScope's implementation is simpler.
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using TreeScope::document;
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using TreeScope::getElementById;
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Element* host() const { return toElement(parentOrShadowHostNode()); }
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ElementShadow* owner() const { return host() ? host()->shadow() : 0; }
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virtual void insertedInto(ContainerNode*) override;
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virtual void removedFrom(ContainerNode*) override;
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bool containsContentElements() const;
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bool containsShadowRoots() const;
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void didAddInsertionPoint();
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void didRemoveInsertionPoint();
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const Vector<RefPtr<InsertionPoint> >& descendantInsertionPoints();
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// Make protected methods from base class public here.
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using TreeScope::setDocument;
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using TreeScope::setParentTreeScope;
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Element* activeElement() const;
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PassRefPtr<Node> cloneNode(bool, ExceptionState&);
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PassRefPtr<Node> cloneNode(ExceptionState& exceptionState);
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private:
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explicit ShadowRoot(Document&);
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virtual ~ShadowRoot();
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virtual void dispose() override;
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void addChildShadowRoot();
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void removeChildShadowRoot();
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void invalidateDescendantInsertionPoints();
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virtual PassRefPtr<Node> cloneNode(bool) override;
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Vector<RefPtr<InsertionPoint> > m_descendantInsertionPoints;
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unsigned m_descendantContentElementCount;
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unsigned m_childShadowRootCount;
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unsigned m_descendantInsertionPointsIsValid : 1;
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};
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inline Element* ShadowRoot::activeElement() const
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{
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return adjustedFocusedElement();
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}
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DEFINE_NODE_TYPE_CASTS(ShadowRoot, isShadowRoot());
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DEFINE_TYPE_CASTS(ShadowRoot, TreeScope, treeScope, treeScope->rootNode().isShadowRoot(), treeScope.rootNode().isShadowRoot());
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} // namespace blink
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#endif // SKY_ENGINE_CORE_DOM_SHADOW_SHADOWROOT_H_
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