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/*
* Copyright (C) 2006 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef FrameTree_h
#define FrameTree_h
#include "wtf/text/AtomicString.h"
namespace WebCore {
class Frame;
class TreeScope;
class FrameTree {
WTF_MAKE_NONCOPYABLE(FrameTree);
public:
explicit FrameTree(Frame* thisFrame);
~FrameTree();
const AtomicString& name() const { return m_name; }
const AtomicString& uniqueName() const { return m_uniqueName; }
// If |name| is not empty, |fallbackName| is ignored. Otherwise,
// |fallbackName| is used as a source of uniqueName.
void setName(const AtomicString& name, const AtomicString& fallbackName = nullAtom);
Frame* parent() const;
Frame* top() const;
Frame* previousSibling() const;
Frame* nextSibling() const;
Frame* firstChild() const;
Frame* lastChild() const;
bool isDescendantOf(const Frame* ancestor) const;
Frame* traversePreviousWithWrap(bool) const;
Frame* traverseNext(const Frame* stayWithin = 0) const;
Frame* traverseNextWithWrap(bool) const;
Frame* child(const AtomicString& name) const;
Frame* find(const AtomicString& name) const;
unsigned childCount() const;
Frame* scopedChild(unsigned index) const;
Frame* scopedChild(const AtomicString& name) const;
unsigned scopedChildCount() const;
void invalidateScopedChildCount();
private:
Frame* deepLastChild() const;
AtomicString uniqueChildName(const AtomicString& requestedName) const;
bool uniqueNameExists(const AtomicString& name) const;
unsigned scopedChildCount(TreeScope*) const;
Frame* m_thisFrame;
AtomicString m_name; // The actual frame name (may be empty).
AtomicString m_uniqueName;
mutable unsigned m_scopedChildCount;
};
} // namespace WebCore
#ifndef NDEBUG
// Outside the WebCore namespace for ease of invocation from gdb.
void showFrameTree(const WebCore::Frame*);
#endif
#endif // FrameTree_h
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