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295f920116
I wrote a script to do this which is attached to the bug. TBR=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/736373003
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/*
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* Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_DOM_POSITIONITERATOR_H_
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#define SKY_ENGINE_CORE_DOM_POSITIONITERATOR_H_
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#include "sky/engine/core/dom/Node.h"
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#include "sky/engine/core/dom/NodeTraversal.h"
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#include "sky/engine/core/dom/Position.h"
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namespace blink {
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// A Position iterator with constant-time
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// increment, decrement, and several predicates on the Position it is at.
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// Conversion to/from Position is O(n) in the offset.
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class PositionIterator {
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STACK_ALLOCATED();
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public:
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PositionIterator()
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: m_anchorNode(nullptr)
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, m_nodeAfterPositionInAnchor(nullptr)
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, m_offsetInAnchor(0)
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{
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}
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PositionIterator(const Position& pos)
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: m_anchorNode(pos.anchorNode())
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, m_nodeAfterPositionInAnchor(NodeTraversal::childAt(*m_anchorNode, pos.deprecatedEditingOffset()))
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, m_offsetInAnchor(m_nodeAfterPositionInAnchor ? 0 : pos.deprecatedEditingOffset())
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{
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}
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operator Position() const;
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void increment();
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void decrement();
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Node* node() const { return m_anchorNode; }
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int offsetInLeafNode() const { return m_offsetInAnchor; }
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bool atStart() const;
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bool atEnd() const;
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bool atStartOfNode() const;
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bool atEndOfNode() const;
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bool isCandidate() const;
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private:
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RawPtr<Node> m_anchorNode;
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RawPtr<Node> m_nodeAfterPositionInAnchor; // If this is non-null, m_nodeAfterPositionInAnchor->parentNode() == m_anchorNode;
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int m_offsetInAnchor;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_DOM_POSITIONITERATOR_H_
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