1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef MINIKIN_LAYOUT_UTILS_H
18#define MINIKIN_LAYOUT_UTILS_H
19
20#include <stdint.h>
21
22namespace minikin {
23
24/*
25 * Determine whether the code unit is a word space for the purposes of justification.
26 */
27bool isWordSpace(uint16_t code_unit);
28
29/**
30 * Return offset of previous word break. It is either < offset or == 0.
31 *
32 * For the purpose of layout, a word break is a boundary with no
33 * kerning or complex script processing. This is necessarily a
34 * heuristic, but should be accurate most of the time.
35 */
36size_t getPrevWordBreakForCache(
37        const uint16_t* chars, size_t offset, size_t len);
38
39/**
40 * Return offset of next word break. It is either > offset or == len.
41 *
42 * For the purpose of layout, a word break is a boundary with no
43 * kerning or complex script processing. This is necessarily a
44 * heuristic, but should be accurate most of the time.
45 */
46size_t getNextWordBreakForCache(
47        const uint16_t* chars, size_t offset, size_t len);
48
49}  // namespace minikin
50#endif  // MINIKIN_LAYOUT_UTILS_H
51