#ifndef FrameTree_h
#define FrameTree_h
#include <wtf/text/AtomicString.h>
namespace WebCore {
class Frame;
class TreeScope;
class FrameTree {
WTF_MAKE_NONCOPYABLE(FrameTree);
public:
const static unsigned invalidCount = static_cast<unsigned>(-1);
FrameTree(Frame& thisFrame, Frame* parentFrame)
: m_thisFrame(thisFrame)
, m_parent(parentFrame)
, m_previousSibling(nullptr)
, m_lastChild(nullptr)
, m_scopedChildCount(invalidCount)
{
}
~FrameTree();
const AtomicString& name() const { return m_name; }
const AtomicString& uniqueName() const { return m_uniqueName; }
WEBCORE_EXPORT void setName(const AtomicString&);
WEBCORE_EXPORT void clearName();
WEBCORE_EXPORT Frame* parent() const;
void setParent(Frame* parent) { m_parent = parent; }
Frame* nextSibling() const { return m_nextSibling.get(); }
Frame* previousSibling() const { return m_previousSibling; }
Frame* firstChild() const { return m_firstChild.get(); }
Frame* lastChild() const { return m_lastChild; }
Frame* firstRenderedChild() const;
Frame* nextRenderedSibling() const;
WEBCORE_EXPORT bool isDescendantOf(const Frame* ancestor) const;
WEBCORE_EXPORT Frame* traverseNext(const Frame* stayWithin = nullptr) const;
WEBCORE_EXPORT Frame* traverseNextRendered(const Frame* stayWithin = nullptr) const;
WEBCORE_EXPORT Frame* traverseNextWithWrap(bool) const;
WEBCORE_EXPORT Frame* traversePreviousWithWrap(bool) const;
WEBCORE_EXPORT void appendChild(PassRefPtr<Frame>);
bool transferChild(PassRefPtr<Frame>);
void detachFromParent() { m_parent = nullptr; }
void removeChild(Frame*);
Frame* child(unsigned index) const;
Frame* child(const AtomicString& name) const;
WEBCORE_EXPORT Frame* find(const AtomicString& name) const;
WEBCORE_EXPORT unsigned childCount() const;
AtomicString uniqueChildName(const AtomicString& requestedName) const;
WEBCORE_EXPORT Frame& top() const;
Frame* scopedChild(unsigned index) const;
Frame* scopedChild(const AtomicString& name) const;
unsigned scopedChildCount() const;
private:
Frame* deepLastChild() const;
void actuallyAppendChild(PassRefPtr<Frame>);
bool scopedBy(TreeScope*) const;
Frame* scopedChild(unsigned index, TreeScope*) const;
Frame* scopedChild(const AtomicString& name, TreeScope*) const;
unsigned scopedChildCount(TreeScope*) const;
Frame& m_thisFrame;
Frame* m_parent;
AtomicString m_name; AtomicString m_uniqueName;
RefPtr<Frame> m_nextSibling;
Frame* m_previousSibling;
RefPtr<Frame> m_firstChild;
Frame* m_lastChild;
mutable unsigned m_scopedChildCount;
};
}
#ifndef NDEBUG
WEBCORE_EXPORT void showFrameTree(const WebCore::Frame*);
#endif
#endif // FrameTree_h