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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OMNIBOX_BROWSER_TAILORED_WORD_BREAK_ITERATOR_H_
#define COMPONENTS_OMNIBOX_BROWSER_TAILORED_WORD_BREAK_ITERATOR_H_
#include "base/i18n/break_iterator.h"
// Breaks on an underscore. Otherwise, it behaves like its parent class with
// BreakIterator::BREAK_WORD.
class TailoredWordBreakIterator : public base::i18n::BreakIterator {
public:
TailoredWordBreakIterator(const base::StringPiece16& str,
base::i18n::BreakIterator::BreakType break_type);
~TailoredWordBreakIterator();
bool Advance();
bool IsWord() const;
// Returns characters between |prev_| and |pos_| if |underscore_word_| is not
// empty. Otherwise returns the normal BreakIterator-determined current word.
base::StringPiece16 GetStringPiece() const;
base::string16 GetString() const;
size_t prev() const;
size_t pos() const;
private:
// Returns true if we processing a word with underscores (i.e., |pos| points
// to a valid position in |underscore_word_|).
bool HasUnderscoreWord() const;
// Updates |prev_| and |pos_| considering underscore.
void AdvanceInUnderscoreWord();
// |prev_| and |pos_| are indices to |underscore_word_|.
size_t prev_, pos_;
// Set if BreakIterator::GetStringPiece() contains '_', otherwise it's empty.
base::StringPiece16 underscore_word_;
DISALLOW_COPY_AND_ASSIGN(TailoredWordBreakIterator);
};
#endif // COMPONENTS_OMNIBOX_BROWSER_TAILORED_WORD_BREAK_ITERATOR_H_
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