/*
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* Copyright (C) 2017 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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#include "HyphenatorMap.h"
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#include "LocaleListCache.h"
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#include "MinikinInternal.h"
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namespace minikin {
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namespace {
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constexpr SubtagBits LANGUAGE = SubtagBits::LANGUAGE;
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constexpr SubtagBits SCRIPT = SubtagBits::SCRIPT;
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constexpr SubtagBits REGION = SubtagBits::REGION;
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constexpr SubtagBits VARIANT = SubtagBits::VARIANT;
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constexpr int DEFAULT_MIN_PREFIX = 2;
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constexpr int DEFAULT_MAX_PREFIX = 2;
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} // namespace
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// Following two function's implementations are here since Hyphenator.cpp can't include
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// HyphenatorMap.h due to harfbuzz dependency on the host binary.
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void addHyphenator(const std::string& localeStr, const Hyphenator* hyphenator) {
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HyphenatorMap::add(localeStr, hyphenator);
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}
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void addHyphenatorAlias(const std::string& fromLocaleStr, const std::string& toLocaleStr) {
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HyphenatorMap::addAlias(fromLocaleStr, toLocaleStr);
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}
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HyphenatorMap::HyphenatorMap()
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: mSoftHyphenOnlyHyphenator(
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Hyphenator::loadBinary(nullptr, DEFAULT_MIN_PREFIX, DEFAULT_MAX_PREFIX, "")) {}
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void HyphenatorMap::addInternal(const std::string& localeStr, const Hyphenator* hyphenator) {
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const Locale locale(localeStr);
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std::lock_guard<std::mutex> lock(mMutex);
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// Overwrite even if there is already a fallback entry.
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mMap[locale.getIdentifier()] = hyphenator;
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}
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void HyphenatorMap::clearInternal() {
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std::lock_guard<std::mutex> lock(mMutex);
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mMap.clear();
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}
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void HyphenatorMap::addAliasInternal(const std::string& fromLocaleStr,
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const std::string& toLocaleStr) {
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const Locale fromLocale(fromLocaleStr);
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const Locale toLocale(toLocaleStr);
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std::lock_guard<std::mutex> lock(mMutex);
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auto it = mMap.find(toLocale.getIdentifier());
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if (it == mMap.end()) {
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ALOGE("Target Hyphenator not found.");
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return;
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}
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// Overwrite even if there is already a fallback entry.
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mMap[fromLocale.getIdentifier()] = it->second;
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}
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const Hyphenator* HyphenatorMap::lookupInternal(const Locale& locale) {
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const uint64_t id = locale.getIdentifier();
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std::lock_guard<std::mutex> lock(mMutex);
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const Hyphenator* result = lookupByIdentifier(id);
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if (result != nullptr) {
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return result; // Found with exact match.
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}
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// First, try with dropping emoji extensions.
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result = lookupBySubtag(locale, LANGUAGE | REGION | SCRIPT | VARIANT);
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if (result != nullptr) {
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goto insert_result_and_return;
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}
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// If not found, try with dropping script.
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result = lookupBySubtag(locale, LANGUAGE | REGION | VARIANT);
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if (result != nullptr) {
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goto insert_result_and_return;
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}
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// If not found, try with dropping script and region code.
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result = lookupBySubtag(locale, LANGUAGE | VARIANT);
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if (result != nullptr) {
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goto insert_result_and_return;
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}
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// If not found, try only with language code.
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result = lookupBySubtag(locale, LANGUAGE);
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if (result != nullptr) {
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goto insert_result_and_return;
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}
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// Still not found, try only with script.
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result = lookupBySubtag(locale, SCRIPT);
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if (result != nullptr) {
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goto insert_result_and_return;
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}
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// If not found, use soft hyphen only hyphenator.
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result = mSoftHyphenOnlyHyphenator;
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insert_result_and_return:
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mMap.insert(std::make_pair(id, result));
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return result;
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}
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const Hyphenator* HyphenatorMap::lookupByIdentifier(uint64_t id) const {
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auto it = mMap.find(id);
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return it == mMap.end() ? nullptr : it->second;
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}
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const Hyphenator* HyphenatorMap::lookupBySubtag(const Locale& locale, SubtagBits bits) const {
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const Locale partialLocale = locale.getPartialLocale(bits);
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if (!partialLocale.isSupported() || partialLocale == locale) {
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return nullptr; // Skip the partial locale result in the same locale or not supported.
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}
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return lookupByIdentifier(partialLocale.getIdentifier());
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}
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} // namespace minikin
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