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/*
* 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
* 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 ShadowRoot_h
#define ShadowRoot_h
#include "ContainerNode.h"
#include "ContentDistributor.h"
#include "Document.h"
#include "DocumentFragment.h"
#include "Element.h"
#include "ExceptionCode.h"
#include "TreeScope.h"
namespace WebCore {
class ShadowRoot final : public DocumentFragment, public TreeScope {
public:
// FIXME: We will support multiple shadow subtrees, however current implementation does not work well
// if a shadow root is dynamically created. So we prohibit multiple shadow subtrees
// in several elements for a while.
// See https://bugs.webkit.org/show_bug.cgi?id=77503 and related bugs.
enum ShadowRootType {
UserAgentShadowRoot = 0,
AuthorShadowRoot
};
static PassRefPtr<ShadowRoot> create(Document& document, ShadowRootType type)
{
return adoptRef(new ShadowRoot(document, type));
}
virtual ~ShadowRoot();
virtual bool applyAuthorStyles() const override { return m_applyAuthorStyles; }
void setApplyAuthorStyles(bool);
bool resetStyleInheritance() const { return m_resetStyleInheritance; }
void setResetStyleInheritance(bool);
Element* hostElement() const { return m_hostElement; }
void setHostElement(Element* hostElement) { m_hostElement = hostElement; }
String innerHTML() const;
void setInnerHTML(const String&, ExceptionCode&);
Element* activeElement() const;
ShadowRootType type() const { return static_cast<ShadowRootType>(m_type); }
PassRefPtr<Node> cloneNode(bool, ExceptionCode&);
ContentDistributor& distributor() { return m_distributor; }
void invalidateDistribution() { m_distributor.invalidateDistribution(hostElement()); }
virtual void removeAllEventListeners() override;
private:
ShadowRoot(Document&, ShadowRootType);
virtual void dropChildren() override;
virtual bool childTypeAllowed(NodeType) const override;
virtual void childrenChanged(const ChildChange&) override;
// ShadowRoots should never be cloned.
virtual PassRefPtr<Node> cloneNode(bool) override { return 0; }
// FIXME: This shouldn't happen. https://bugs.webkit.org/show_bug.cgi?id=88834
bool isOrphan() const { return !hostElement(); }
unsigned m_applyAuthorStyles : 1;
unsigned m_resetStyleInheritance : 1;
unsigned m_type : 1;
Element* m_hostElement;
ContentDistributor m_distributor;
};
inline Element* ShadowRoot::activeElement() const
{
return treeScope().focusedElement();
}
inline const ShadowRoot* toShadowRoot(const Node* node)
{
ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isShadowRoot());
return static_cast<const ShadowRoot*>(node);
}
inline ShadowRoot* toShadowRoot(Node* node)
{
return const_cast<ShadowRoot*>(toShadowRoot(static_cast<const Node*>(node)));
}
inline ShadowRoot* Node::shadowRoot() const
{
if (!isElementNode())
return 0;
return toElement(this)->shadowRoot();
}
inline ContainerNode* Node::parentOrShadowHostNode() const
{
ASSERT(isMainThreadOrGCThread());
if (isShadowRoot())
return toShadowRoot(this)->hostElement();
return parentNode();
}
inline bool hasShadowRootParent(const Node& node)
{
return node.parentNode() && node.parentNode()->isShadowRoot();
}
} // namespace
#endif
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