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 17 #include <sys/mman.h> 18 #include <sys/types.h> 19 #include <sys/stat.h> 20 #include <unistd.h> 21 22 #include <algorithm> 23 24 #include <core_jni_helpers.h> 25 #include <minikin/Hyphenator.h> 26 27 namespace android { 28 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 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 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. 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 Bokml 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 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. 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) 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 Bokml. 150 addHyphenatorAlias("no", "nb"); 151 152 // Use mn-Cyrl. According to CLDR's likelySubtags.xml, mn is most likely to be mn-Cyrl. 153 addHyphenatorAlias("mn", "mn-Cyrl"); // Mongolian 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(). 158 addHyphenatorAlias("am", "und-Ethi"); // Amharic 159 addHyphenatorAlias("byn", "und-Ethi"); // Blin 160 addHyphenatorAlias("gez", "und-Ethi"); // Geez 161 addHyphenatorAlias("ti", "und-Ethi"); // Tigrinya 162 addHyphenatorAlias("wal", "und-Ethi"); // Wolaytta 163 164 // 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 175 } 176 177 static const JNINativeMethod gMethods[] = { 178 {"nInit", "()V", (void*) init}, 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 186
