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26 #ifndef PositionIterator_h
27 #define PositionIterator_h
29 #include "core/dom/Node.h"
30 #include "core/dom/Position.h"
34 // A Position iterator with constant-time
35 // increment, decrement, and several predicates on the Position it is at.
36 // Conversion to/from Position is O(n) in the offset.
37 class PositionIterator {
41 : m_anchorNode(nullptr)
42 , m_nodeAfterPositionInAnchor(nullptr)
47 PositionIterator(const Position& pos)
48 : m_anchorNode(pos.anchorNode())
49 , m_nodeAfterPositionInAnchor(m_anchorNode->traverseToChildAt(pos.deprecatedEditingOffset()))
50 , m_offsetInAnchor(m_nodeAfterPositionInAnchor ? 0 : pos.deprecatedEditingOffset())
53 operator Position() const;
58 Node* node() const { return m_anchorNode; }
59 int offsetInLeafNode() const { return m_offsetInAnchor; }
63 bool atStartOfNode() const;
64 bool atEndOfNode() const;
65 bool isCandidate() const;
68 RawPtrWillBeMember<Node> m_anchorNode;
69 RawPtrWillBeMember<Node> m_nodeAfterPositionInAnchor; // If this is non-null, m_nodeAfterPositionInAnchor->parentNode() == m_anchorNode;
73 } // namespace WebCore
75 #endif // PositionIterator_h