/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MINIKIN_LAYOUT_UTILS_H
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#define MINIKIN_LAYOUT_UTILS_H
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#include <cstdint>
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#include "minikin/U16StringPiece.h"
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namespace minikin {
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/*
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* Determine whether the code unit is a word space for the purposes of justification.
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*/
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bool isWordSpace(uint16_t code_unit);
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/**
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* Return offset of previous word break. It is either < offset or == 0.
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*
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* For the purpose of layout, a word break is a boundary with no
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* kerning or complex script processing. This is necessarily a
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* heuristic, but should be accurate most of the time.
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*/
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uint32_t getPrevWordBreakForCache(const U16StringPiece& textBuf, uint32_t offset);
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/**
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* Return offset of next word break. It is either > offset or == len.
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*
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* For the purpose of layout, a word break is a boundary with no
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* kerning or complex script processing. This is necessarily a
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* heuristic, but should be accurate most of the time.
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*/
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uint32_t getNextWordBreakForCache(const U16StringPiece& textBuf, uint32_t offset);
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} // namespace minikin
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#endif // MINIKIN_LAYOUT_UTILS_H
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