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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* A wrapper around ICU's line break iterator, that gives customized line
* break opportunities, as well as identifying words for the purpose of
* hyphenation.
*/
#ifndef MINIKIN_WORD_BREAKER_H
#define MINIKIN_WORD_BREAKER_H
#include "unicode/brkiter.h"
#include <memory>
namespace android {
class WordBreaker {
public:
~WordBreaker() {
finish();
}
void setLocale(const icu::Locale& locale);
void setText(const uint16_t* data, size_t size);
// Advance iterator to next word break. Return offset, or -1 if EOT
ssize_t next();
// Current offset of iterator, equal to 0 at BOT or last return from next()
ssize_t current() const;
// After calling next(), wordStart() and wordEnd() are offsets defining the previous
// word. If wordEnd <= wordStart, it's not a word for the purpose of hyphenation.
ssize_t wordStart() const;
ssize_t wordEnd() const;
void finish();
private:
std::unique_ptr<icu::BreakIterator> mBreakIterator;
UText mUText = UTEXT_INITIALIZER;
const uint16_t* mText = nullptr;
size_t mTextSize;
ssize_t mLast;
ssize_t mCurrent;
bool mIteratorWasReset;
// state for the email address / url detector
ssize_t mScanOffset;
bool mSuppressHyphen;
};
} // namespace
#endif // MINIKIN_WORD_BREAKER_H
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