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/*
* Copyright (C) 2012 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
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* 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.
*/
#ifndef ElementShadow_h
#define ElementShadow_h
#include "bindings/core/v8/ScriptWrappable.h"
#include "bindings/core/v8/TraceWrapperMember.h"
#include "core/CoreExport.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "platform/heap/Handle.h"
#include "wtf/Noncopyable.h"
namespace blink {
class ElementShadowV0;
class CORE_EXPORT ElementShadow final : public GarbageCollected<ElementShadow>,
public TraceWrapperBase {
WTF_MAKE_NONCOPYABLE(ElementShadow);
public:
static ElementShadow* create();
Element& host() const {
DCHECK(m_shadowRoot);
return m_shadowRoot->host();
}
// TODO(hayato): Remove youngestShadowRoot() and oldestShadowRoot() from
// ElementShadow
ShadowRoot& youngestShadowRoot() const;
ShadowRoot& oldestShadowRoot() const {
DCHECK(m_shadowRoot);
return *m_shadowRoot;
}
ElementShadow* containingShadow() const;
ShadowRoot& addShadowRoot(Element& shadowHost, ShadowRootType);
bool hasSameStyles(const ElementShadow&) const;
void attach(const Node::AttachContext&);
void detach(const Node::AttachContext&);
void distributeIfNeeded();
void setNeedsDistributionRecalc();
bool needsDistributionRecalc() const { return m_needsDistributionRecalc; }
bool isV1() const { return youngestShadowRoot().isV1(); }
bool isOpenOrV0() const { return youngestShadowRoot().isOpenOrV0(); }
ElementShadowV0& v0() const {
DCHECK(m_elementShadowV0);
return *m_elementShadowV0;
}
DECLARE_TRACE();
DECLARE_TRACE_WRAPPERS();
private:
ElementShadow();
void appendShadowRoot(ShadowRoot&);
void distribute();
TraceWrapperMember<ElementShadowV0> m_elementShadowV0;
TraceWrapperMember<ShadowRoot> m_shadowRoot;
bool m_needsDistributionRecalc;
};
inline ShadowRoot* Node::youngestShadowRoot() const {
if (!isElementNode())
return nullptr;
return toElement(this)->youngestShadowRoot();
}
inline ShadowRoot* Element::youngestShadowRoot() const {
if (ElementShadow* shadow = this->shadow())
return &shadow->youngestShadowRoot();
return nullptr;
}
inline ElementShadow* ElementShadow::containingShadow() const {
if (ShadowRoot* parentRoot = host().containingShadowRoot())
return parentRoot->owner();
return nullptr;
}
inline void ElementShadow::distributeIfNeeded() {
if (m_needsDistributionRecalc)
distribute();
m_needsDistributionRecalc = false;
}
} // namespace blink
#endif
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