| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| #include <sys/mman.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #include <algorithm> |
| |
| #include <core_jni_helpers.h> |
| #include <minikin/Hyphenator.h> |
| |
| namespace android { |
| |
| static std::string buildFileName(const std::string& locale) { |
| constexpr char SYSTEM_HYPHENATOR_PREFIX[] = "/system/usr/hyphen-data/hyph-"; |
| constexpr char SYSTEM_HYPHENATOR_SUFFIX[] = ".hyb"; |
| std::string lowerLocale; |
| lowerLocale.reserve(locale.size()); |
| std::transform(locale.begin(), locale.end(), std::back_inserter(lowerLocale), ::tolower); |
| return SYSTEM_HYPHENATOR_PREFIX + lowerLocale + SYSTEM_HYPHENATOR_SUFFIX; |
| } |
| |
| static const uint8_t* mmapPatternFile(const std::string& locale) { |
| const std::string hyFilePath = buildFileName(locale); |
| const int fd = open(hyFilePath.c_str(), O_RDONLY | O_CLOEXEC); |
| if (fd == -1) { |
| return nullptr; // Open failed. |
| } |
| |
| struct stat st = {}; |
| if (fstat(fd, &st) == -1) { // Unlikely to happen. |
| close(fd); |
| return nullptr; |
| } |
| |
| void* ptr = mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd, 0 /* offset */); |
| close(fd); |
| if (ptr == MAP_FAILED) { |
| return nullptr; |
| } |
| return reinterpret_cast<const uint8_t*>(ptr); |
| } |
| |
| static void addHyphenatorWithoutPatternFile(const std::string& locale, int minPrefix, |
| int minSuffix) { |
| minikin::addHyphenator(locale, minikin::Hyphenator::loadBinary( |
| nullptr, minPrefix, minSuffix, locale)); |
| } |
| |
| static void addHyphenator(const std::string& locale, int minPrefix, int minSuffix) { |
| const uint8_t* ptr = mmapPatternFile(locale); |
| if (ptr == nullptr) { |
| ALOGE("Unable to find pattern file or unable to map it for %s", locale.c_str()); |
| return; |
| } |
| minikin::addHyphenator(locale, minikin::Hyphenator::loadBinary( |
| ptr, minPrefix, minSuffix, locale)); |
| } |
| |
| static void addHyphenatorAlias(const std::string& from, const std::string& to) { |
| minikin::addHyphenatorAlias(from, to); |
| } |
| |
| static void init() { |
| // TODO: Confirm that these are the best values. Various sources suggest (1, 1), but that |
| // appears too small. |
| constexpr int INDIC_MIN_PREFIX = 2; |
| constexpr int INDIC_MIN_SUFFIX = 2; |
| |
| addHyphenator("as", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Assamese |
| addHyphenator("be", 2, 2); // Belarusian |
| addHyphenator("bg", 2, 2); // Bulgarian |
| addHyphenator("bn", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Bengali |
| addHyphenator("cu", 1, 2); // Church Slavonic |
| addHyphenator("cy", 2, 3); // Welsh |
| addHyphenator("da", 2, 2); // Danish |
| addHyphenator("de-1901", 2, 2); // German 1901 orthography |
| addHyphenator("de-1996", 2, 2); // German 1996 orthography |
| addHyphenator("de-CH-1901", 2, 2); // Swiss High German 1901 orthography |
| addHyphenator("en-GB", 2, 3); // British English |
| addHyphenator("en-US", 2, 3); // American English |
| addHyphenator("es", 2, 2); // Spanish |
| addHyphenator("et", 2, 3); // Estonian |
| addHyphenator("eu", 2, 2); // Basque |
| addHyphenator("fr", 2, 3); // French |
| addHyphenator("ga", 2, 3); // Irish |
| addHyphenator("gu", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Gujarati |
| addHyphenator("hi", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Hindi |
| addHyphenator("hr", 2, 2); // Croatian |
| addHyphenator("hu", 2, 2); // Hungarian |
| // texhyphen sources say Armenian may be (1, 2); but that it needs confirmation. |
| // Going with a more conservative value of (2, 2) for now. |
| addHyphenator("hy", 2, 2); // Armenian |
| addHyphenator("kn", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Kannada |
| addHyphenator("la", 2, 2); // Latin |
| addHyphenator("ml", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Malayalam |
| addHyphenator("mn-Cyrl", 2, 2); // Mongolian in Cyrillic script |
| addHyphenator("mr", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Marathi |
| addHyphenator("nb", 2, 2); // Norwegian Bokmål |
| addHyphenator("nn", 2, 2); // Norwegian Nynorsk |
| addHyphenator("or", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Oriya |
| addHyphenator("pa", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Punjabi |
| addHyphenator("pt", 2, 3); // Portuguese |
| addHyphenator("sl", 2, 2); // Slovenian |
| addHyphenator("ta", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Tamil |
| addHyphenator("te", INDIC_MIN_PREFIX, INDIC_MIN_SUFFIX); // Telugu |
| addHyphenator("tk", 2, 2); // Turkmen |
| addHyphenator("und-Ethi", 1, 1); // Any language in Ethiopic script |
| |
| // Following two hyphenators do not have pattern files but there is some special logic based on |
| // language. |
| addHyphenatorWithoutPatternFile("ca", 2, 2); // Catalan |
| addHyphenatorWithoutPatternFile("pl", 2, 2); // Polish |
| |
| // English locales that fall back to en-US. The data is from CLDR. It's all English locales, |
| // minus the locales whose parent is en-001 (from supplementalData.xml, under <parentLocales>). |
| // TODO: Figure out how to get this from ICU. |
| addHyphenatorAlias("en-AS", "en-US"); // English (American Samoa) |
| addHyphenatorAlias("en-GU", "en-US"); // English (Guam) |
| addHyphenatorAlias("en-MH", "en-US"); // English (Marshall Islands) |
| addHyphenatorAlias("en-MP", "en-US"); // English (Northern Mariana Islands) |
| addHyphenatorAlias("en-PR", "en-US"); // English (Puerto Rico) |
| addHyphenatorAlias("en-UM", "en-US"); // English (United States Minor Outlying Islands) |
| addHyphenatorAlias("en-VI", "en-US"); // English (Virgin Islands) |
| |
| // All English locales other than those falling back to en-US are mapped to en-GB. |
| addHyphenatorAlias("en", "en-GB"); |
| |
| // For German, we're assuming the 1996 (and later) orthography by default. |
| addHyphenatorAlias("de", "de-1996"); |
| // Liechtenstein uses the Swiss hyphenation rules for the 1901 orthography. |
| addHyphenatorAlias("de-LI-1901", "de-CH-1901"); |
| |
| // Norwegian is very probably Norwegian Bokmål. |
| addHyphenatorAlias("no", "nb"); |
| |
| // Use mn-Cyrl. According to CLDR's likelySubtags.xml, mn is most likely to be mn-Cyrl. |
| addHyphenatorAlias("mn", "mn-Cyrl"); // Mongolian |
| |
| // Fall back to Ethiopic script for languages likely to be written in Ethiopic. |
| // Data is from CLDR's likelySubtags.xml. |
| // TODO: Convert this to a mechanism using ICU4J's ULocale#addLikelySubtags(). |
| addHyphenatorAlias("am", "und-Ethi"); // Amharic |
| addHyphenatorAlias("byn", "und-Ethi"); // Blin |
| addHyphenatorAlias("gez", "und-Ethi"); // Geʻez |
| addHyphenatorAlias("ti", "und-Ethi"); // Tigrinya |
| addHyphenatorAlias("wal", "und-Ethi"); // Wolaytta |
| |
| // Use Hindi as a fallback hyphenator for all languages written in Devanagari, etc. This makes |
| // sense because our Indic patterns are not really linguistic, but script-based. |
| addHyphenatorAlias("und-Beng", "bn"); // Bengali |
| addHyphenatorAlias("und-Deva", "hi"); // Devanagari -> Hindi |
| addHyphenatorAlias("und-Gujr", "gu"); // Gujarati |
| addHyphenatorAlias("und-Guru", "pa"); // Gurmukhi -> Punjabi |
| addHyphenatorAlias("und-Knda", "kn"); // Kannada |
| addHyphenatorAlias("und-Mlym", "ml"); // Malayalam |
| addHyphenatorAlias("und-Orya", "or"); // Oriya |
| addHyphenatorAlias("und-Taml", "ta"); // Tamil |
| addHyphenatorAlias("und-Telu", "te"); // Telugu |
| } |
| |
| static const JNINativeMethod gMethods[] = { |
| {"nInit", "()V", (void*) init}, |
| }; |
| |
| int register_android_text_Hyphenator(JNIEnv* env) { |
| return RegisterMethodsOrDie(env, "android/text/Hyphenator", gMethods, NELEM(gMethods)); |
| } |
| |
| } // namespace android |