Seigo Nonaka | 44a1df2 | 2017-08-31 18:22:38 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 17 | #include <sys/mman.h> |
| 18 | #include <sys/types.h> |
| 19 | #include <sys/stat.h> |
| 20 | #include <unistd.h> |
| 21 | |
| 22 | #include <algorithm> |
| 23 | |
Seigo Nonaka | 44a1df2 | 2017-08-31 18:22:38 -0700 | [diff] [blame] | 24 | #include <core_jni_helpers.h> |
| 25 | #include <minikin/Hyphenator.h> |
Seigo Nonaka | 44a1df2 | 2017-08-31 18:22:38 -0700 | [diff] [blame] | 26 | |
| 27 | namespace android { |
| 28 | |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 29 | static std::string buildFileName(const std::string& locale) { |
| 30 | constexpr char SYSTEM_HYPHENATOR_PREFIX[] = "/system/usr/hyphen-data/hyph-"; |
| 31 | constexpr char SYSTEM_HYPHENATOR_SUFFIX[] = ".hyb"; |
| 32 | std::string lowerLocale; |
| 33 | lowerLocale.reserve(locale.size()); |
| 34 | std::transform(locale.begin(), locale.end(), std::back_inserter(lowerLocale), ::tolower); |
| 35 | return SYSTEM_HYPHENATOR_PREFIX + lowerLocale + SYSTEM_HYPHENATOR_SUFFIX; |
| 36 | } |
| 37 | |
| 38 | static const uint8_t* mmapPatternFile(const std::string& locale) { |
| 39 | const std::string hyFilePath = buildFileName(locale); |
| 40 | const int fd = open(hyFilePath.c_str(), O_RDONLY); |
| 41 | if (fd == -1) { |
| 42 | return nullptr; // Open failed. |
| 43 | } |
| 44 | |
| 45 | struct stat st = {}; |
| 46 | if (fstat(fd, &st) == -1) { // Unlikely to happen. |
| 47 | close(fd); |
| 48 | return nullptr; |
| 49 | } |
| 50 | |
| 51 | void* ptr = mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd, 0 /* offset */); |
| 52 | close(fd); |
| 53 | if (ptr == MAP_FAILED) { |
| 54 | return nullptr; |
| 55 | } |
| 56 | return reinterpret_cast<const uint8_t*>(ptr); |
| 57 | } |
| 58 | |
| 59 | static void addHyphenatorWithoutPatternFile(const std::string& locale, int minPrefix, |
| 60 | int minSuffix) { |
| 61 | minikin::addHyphenator(locale, minikin::Hyphenator::loadBinary( |
| 62 | nullptr, minPrefix, minSuffix, locale)); |
| 63 | } |
| 64 | |
| 65 | static void addHyphenator(const std::string& locale, int minPrefix, int minSuffix) { |
| 66 | const uint8_t* ptr = mmapPatternFile(locale); |
| 67 | if (ptr == nullptr) { |
| 68 | ALOGE("Unable to find pattern file or unable to map it for %s", locale.c_str()); |
| 69 | return; |
| 70 | } |
| 71 | minikin::addHyphenator(locale, minikin::Hyphenator::loadBinary( |
| 72 | ptr, minPrefix, minSuffix, locale)); |
| 73 | } |
| 74 | |
| 75 | static void addHyphenatorAlias(const std::string& from, const std::string& to) { |
| 76 | minikin::addHyphenatorAlias(from, to); |
| 77 | } |
| 78 | |
| 79 | static void init() { |
| 80 | // TODO: Confirm that these are the best values. Various sources suggest (1, 1), but that |
| 81 | // appears too small. |
| 82 | constexpr int INDIC_MIN_PREFIX = 2; |
| 83 | constexpr int INDIC_MIN_SUFFIX = 2; |
| 84 | |
Roozbeh Pournader | 28c5b4d | 2017-10-24 16:40:21 -0700 | [diff] [blame] | 85 | addHyphenator("as", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Assamese |
| 86 | addHyphenator("be", 2, 2); // Belarusian |
| 87 | addHyphenator("bg", 2, 2); // Bulgarian |
| 88 | addHyphenator("bn", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Bengali |
| 89 | addHyphenator("cu", 1, 2); // Church Slavonic |
| 90 | addHyphenator("cy", 2, 3); // Welsh |
| 91 | addHyphenator("da", 2, 2); // Danish |
| 92 | addHyphenator("de-1901", 2, 2); // German 1901 orthography |
| 93 | addHyphenator("de-1996", 2, 2); // German 1996 orthography |
| 94 | addHyphenator("de-CH-1901", 2, 2); // Swiss High German 1901 orthography |
| 95 | addHyphenator("en-GB", 2, 3); // British English |
| 96 | addHyphenator("en-US", 2, 3); // American English |
| 97 | addHyphenator("es", 2, 2); // Spanish |
| 98 | addHyphenator("et", 2, 3); // Estonian |
| 99 | addHyphenator("eu", 2, 2); // Basque |
| 100 | addHyphenator("fr", 2, 3); // French |
| 101 | addHyphenator("ga", 2, 3); // Irish |
| 102 | addHyphenator("gu", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Gujarati |
| 103 | addHyphenator("hi", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Hindi |
| 104 | addHyphenator("hr", 2, 2); // Croatian |
| 105 | addHyphenator("hu", 2, 2); // Hungarian |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 106 | // texhyphen sources say Armenian may be (1, 2); but that it needs confirmation. |
| 107 | // Going with a more conservative value of (2, 2) for now. |
Roozbeh Pournader | 28c5b4d | 2017-10-24 16:40:21 -0700 | [diff] [blame] | 108 | addHyphenator("hy", 2, 2); // Armenian |
| 109 | addHyphenator("kn", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Kannada |
| 110 | addHyphenator("la", 2, 2); // Latin |
| 111 | addHyphenator("ml", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Malayalam |
| 112 | addHyphenator("mn-Cyrl", 2, 2); // Mongolian in Cyrillic script |
| 113 | addHyphenator("mr", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Marathi |
| 114 | addHyphenator("nb", 2, 2); // Norwegian Bokmål |
| 115 | addHyphenator("nn", 2, 2); // Norwegian Nynorsk |
| 116 | addHyphenator("or", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Oriya |
| 117 | addHyphenator("pa", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Punjabi |
| 118 | addHyphenator("pt", 2, 3); // Portuguese |
| 119 | addHyphenator("sl", 2, 2); // Slovenian |
| 120 | addHyphenator("ta", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Tamil |
| 121 | addHyphenator("te", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Telugu |
| 122 | addHyphenator("tk", 2, 2); // Turkmen |
| 123 | addHyphenator("und-Ethi", 1, 1); // Any language in Ethiopic script |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 124 | |
| 125 | // Following two hyphenators do not have pattern files but there is some special logic based on |
| 126 | // language. |
| 127 | addHyphenatorWithoutPatternFile("ca", 2, 2); // Catalan |
| 128 | addHyphenatorWithoutPatternFile("pl", 2, 2); // Polish |
| 129 | |
| 130 | // English locales that fall back to en-US. The data is from CLDR. It's all English locales, |
| 131 | // minus the locales whose parent is en-001 (from supplementalData.xml, under <parentLocales>). |
| 132 | // TODO: Figure out how to get this from ICU. |
Roozbeh Pournader | 28c5b4d | 2017-10-24 16:40:21 -0700 | [diff] [blame] | 133 | addHyphenatorAlias("en-AS", "en-US"); // English (American Samoa) |
| 134 | addHyphenatorAlias("en-GU", "en-US"); // English (Guam) |
| 135 | addHyphenatorAlias("en-MH", "en-US"); // English (Marshall Islands) |
| 136 | addHyphenatorAlias("en-MP", "en-US"); // English (Northern Mariana Islands) |
| 137 | addHyphenatorAlias("en-PR", "en-US"); // English (Puerto Rico) |
| 138 | addHyphenatorAlias("en-UM", "en-US"); // English (United States Minor Outlying Islands) |
| 139 | addHyphenatorAlias("en-VI", "en-US"); // English (Virgin Islands) |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 140 | |
| 141 | // All English locales other than those falling back to en-US are mapped to en-GB. |
| 142 | addHyphenatorAlias("en", "en-GB"); |
| 143 | |
| 144 | // For German, we're assuming the 1996 (and later) orthography by default. |
| 145 | addHyphenatorAlias("de", "de-1996"); |
| 146 | // Liechtenstein uses the Swiss hyphenation rules for the 1901 orthography. |
| 147 | addHyphenatorAlias("de-LI-1901", "de-CH-1901"); |
| 148 | |
| 149 | // Norwegian is very probably Norwegian Bokmål. |
| 150 | addHyphenatorAlias("no", "nb"); |
| 151 | |
| 152 | // Use mn-Cyrl. According to CLDR's likelySubtags.xml, mn is most likely to be mn-Cyrl. |
Roozbeh Pournader | 28c5b4d | 2017-10-24 16:40:21 -0700 | [diff] [blame] | 153 | addHyphenatorAlias("mn", "mn-Cyrl"); // Mongolian |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 154 | |
| 155 | // Fall back to Ethiopic script for languages likely to be written in Ethiopic. |
| 156 | // Data is from CLDR's likelySubtags.xml. |
| 157 | // TODO: Convert this to a mechanism using ICU4J's ULocale#addLikelySubtags(). |
Roozbeh Pournader | 28c5b4d | 2017-10-24 16:40:21 -0700 | [diff] [blame] | 158 | addHyphenatorAlias("am", "und-Ethi"); // Amharic |
| 159 | addHyphenatorAlias("byn", "und-Ethi"); // Blin |
| 160 | addHyphenatorAlias("gez", "und-Ethi"); // Geʻez |
| 161 | addHyphenatorAlias("ti", "und-Ethi"); // Tigrinya |
| 162 | addHyphenatorAlias("wal", "und-Ethi"); // Wolaytta |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 163 | |
Roozbeh Pournader | 28c5b4d | 2017-10-24 16:40:21 -0700 | [diff] [blame] | 164 | // Use Hindi as a fallback hyphenator for all languages written in Devanagari, etc. This makes |
| 165 | // sense because our Indic patterns are not really linguistic, but script-based. |
| 166 | addHyphenatorAlias("und-Beng", "bn"); // Bengali |
| 167 | addHyphenatorAlias("und-Deva", "hi"); // Devanagari -> Hindi |
| 168 | addHyphenatorAlias("und-Gujr", "gu"); // Gujarati |
| 169 | addHyphenatorAlias("und-Guru", "pa"); // Gurmukhi -> Punjabi |
| 170 | addHyphenatorAlias("und-Knda", "kn"); // Kannada |
| 171 | addHyphenatorAlias("und-Mlym", "ml"); // Malayalam |
| 172 | addHyphenatorAlias("und-Orya", "or"); // Oriya |
| 173 | addHyphenatorAlias("und-Taml", "ta"); // Tamil |
| 174 | addHyphenatorAlias("und-Telu", "te"); // Telugu |
Seigo Nonaka | 44a1df2 | 2017-08-31 18:22:38 -0700 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | static const JNINativeMethod gMethods[] = { |
Seigo Nonaka | f90c9b6 | 2017-10-09 11:10:24 -0700 | [diff] [blame] | 178 | {"nInit", "()V", (void*) init}, |
Seigo Nonaka | 44a1df2 | 2017-08-31 18:22:38 -0700 | [diff] [blame] | 179 | }; |
| 180 | |
| 181 | int register_android_text_Hyphenator(JNIEnv* env) { |
| 182 | return RegisterMethodsOrDie(env, "android/text/Hyphenator", gMethods, NELEM(gMethods)); |
| 183 | } |
| 184 | |
| 185 | } // namespace android |