position_iterator.h | Explore in Territory

/*
 * Copyright (C) 2007, 2008 Apple 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_POSITION_ITERATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_POSITION_ITERATOR_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/core/editing/editing_strategy.h"
#include "third_party/blink/renderer/core/editing/forward.h"

namespace blink {

// A Position iterator with nearly constant-time
// increment, decrement, and several predicates on the Position it is at.
// Conversion from Position is O(n) in the depth.
// Conversion to Position is O(1).
// PositionIteratorAlgorithm must be used without DOM tree change.
template <typename Strategy>
class SlowPositionIteratorAlgorithm { … };

extern template class CORE_EXTERN_TEMPLATE_EXPORT
    SlowPositionIteratorAlgorithm<EditingStrategy>;
extern template class CORE_EXTERN_TEMPLATE_EXPORT
    SlowPositionIteratorAlgorithm<EditingInFlatTreeStrategy>;

SlowPositionIterator;
SlowPositionIteratorInFlatTree;

// ----

// A Position iterator with nearly constant-time
// increment, decrement, and several predicates on the Position it is at.
// Conversion from Position is O(n) in the depth.
// Conversion to Position is O(1).
// PositionIteratorAlgorithm must be used without DOM tree change.
template <typename Strategy>
class FastPositionIteratorAlgorithm { … };

extern template class CORE_EXTERN_TEMPLATE_EXPORT
    FastPositionIteratorAlgorithm<EditingStrategy>;
extern template class CORE_EXTERN_TEMPLATE_EXPORT
    FastPositionIteratorAlgorithm<EditingInFlatTreeStrategy>;

FastPositionIterator;
FastPositionIteratorInFlatTree;

// --

// The switcher of `FastPositionIterator` and `SlowPositionIterator` based on
// `RuntimeEnabledFeatures::FastPositionItertorEnabled()`.
template <typename Strategy>
class PositionIteratorAlgorithm { … };

extern template class CORE_EXTERN_TEMPLATE_EXPORT
    PositionIteratorAlgorithm<EditingStrategy>;
extern template class CORE_EXTERN_TEMPLATE_EXPORT
    PositionIteratorAlgorithm<EditingInFlatTreeStrategy>;

PositionIterator;
PositionIteratorInFlatTree;

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_POSITION_ITERATOR_H_
chromium/third_party/blink/renderer/core/editing/position_iterator.h
