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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 "Document.h"
#include "DocumentFragment.h"
#include "Element.h"
#include "ExceptionCode.h"
#include "TreeScope.h"
#include <wtf/DoublyLinkedList.h>
namespace WebCore {
class Document;
class DOMSelection;
class ElementShadow;
class InsertionPoint;
class ShadowRootContentDistributionData;
class ShadowRoot : public DocumentFragment, public TreeScope, public DoublyLinkedListNode<ShadowRoot> {
friend class WTF::DoublyLinkedListNode<ShadowRoot>;
public:
static PassRefPtr<ShadowRoot> create(Element*, ExceptionCode&);
// 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,
AuthorShadowRoot
};
static PassRefPtr<ShadowRoot> create(Element*, ShadowRootType, ExceptionCode& = ASSERT_NO_EXCEPTION);
void recalcShadowTreeStyle(StyleChange);
virtual bool applyAuthorStyles() const OVERRIDE;
void setApplyAuthorStyles(bool);
virtual bool resetStyleInheritance() const OVERRIDE;
void setResetStyleInheritance(bool);
Element* host() const;
void setHost(Element*);
ElementShadow* owner() const;
String innerHTML() const;
void setInnerHTML(const String&, ExceptionCode&);
Element* activeElement() const;
ShadowRoot* youngerShadowRoot() const { return prev(); }
ShadowRoot* olderShadowRoot() const { return next(); }
bool isYoungest() const { return !youngerShadowRoot(); }
bool isOldest() const { return !olderShadowRoot(); }
bool hasInsertionPoint() const;
virtual void attach();
virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
virtual void removedFrom(ContainerNode*) OVERRIDE;
bool isUsedForRendering() const;
InsertionPoint* assignedTo() const;
void setAssignedTo(InsertionPoint*);
void registerShadowElement();
void unregisterShadowElement();
bool hasShadowInsertionPoint() const;
void registerContentElement();
void unregisterContentElement();
bool hasContentElement() const;
void registerElementShadow();
void unregisterElementShadow();
bool hasElementShadow() const;
unsigned countElementShadow() const;
const Vector<InsertionPoint*>& insertionPointList();
virtual void registerScopedHTMLStyleChild() OVERRIDE;
virtual void unregisterScopedHTMLStyleChild() OVERRIDE;
ShadowRootType type() const { return m_isAuthorShadowRoot ? AuthorShadowRoot : UserAgentShadowRoot; }
PassRefPtr<Node> cloneNode(bool, ExceptionCode&);
virtual void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE;
private:
explicit ShadowRoot(Document*);
virtual ~ShadowRoot();
virtual String nodeName() const;
virtual PassRefPtr<Node> cloneNode(bool deep);
virtual bool childTypeAllowed(NodeType) const;
virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE;
virtual bool documentFragmentIsShadowRoot() const OVERRIDE { return true; }
void setType(ShadowRootType type) { m_isAuthorShadowRoot = type == AuthorShadowRoot; }
ShadowRootContentDistributionData* distributionData() { return m_distributionData.get(); }
const ShadowRootContentDistributionData* distributionData() const { return m_distributionData.get(); }
ShadowRootContentDistributionData* ensureDistributionData();
ShadowRoot* m_prev;
ShadowRoot* m_next;
OwnPtr<ShadowRootContentDistributionData> m_distributionData;
unsigned m_numberOfStyles : 28;
unsigned m_applyAuthorStyles : 1;
unsigned m_resetStyleInheritance : 1;
unsigned m_isAuthorShadowRoot : 1;
unsigned m_registeredWithParentShadowRoot : 1;
};
inline Element* ShadowRoot::host() const
{
return toElement(parentOrHostNode());
}
inline void ShadowRoot::setHost(Element* host)
{
setParentOrHostNode(host);
}
inline bool ShadowRoot::isUsedForRendering() const
{
return isYoungest() || assignedTo();
}
inline Element* ShadowRoot::activeElement() const
{
if (Node* node = treeScope()->focusedNode())
return node->isElementNode() ? toElement(node) : 0;
return 0;
}
inline const ShadowRoot* toShadowRoot(const Node* node)
{
ASSERT(!node || node->isShadowRoot());
return static_cast<const ShadowRoot*>(node);
}
inline ShadowRoot* toShadowRoot(Node* node)
{
return const_cast<ShadowRoot*>(toShadowRoot(static_cast<const Node*>(node)));
}
} // namespace
#endif
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