| /* |
| * Copyright (C) 2010 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "Hyphenation.h" |
| |
| #include <wtf/Language.h> |
| #include <wtf/RetainPtr.h> |
| #include <wtf/TinyLRUCache.h> |
| #include <wtf/text/StringView.h> |
| #include <wtf/text/TextBreakIteratorInternalICU.h> |
| |
| namespace WTF { |
| |
| template<> |
| class TinyLRUCachePolicy<AtomString, RetainPtr<CFLocaleRef>> |
| { |
| public: |
| static TinyLRUCache<AtomString, RetainPtr<CFLocaleRef>>& cache() |
| { |
| static NeverDestroyed<TinyLRUCache<AtomString, RetainPtr<CFLocaleRef>>> cache; |
| return cache; |
| } |
| |
| static bool isKeyNull(const AtomString& localeIdentifier) |
| { |
| return localeIdentifier.isNull(); |
| } |
| |
| static RetainPtr<CFLocaleRef> createValueForNullKey() |
| { |
| // CF hyphenation functions use locale (regional formats) language, which doesn't necessarily match primary UI language, |
| // so we can't use default locale here. See <rdar://problem/14897664>. |
| RetainPtr<CFLocaleRef> locale = adoptCF(CFLocaleCreate(kCFAllocatorDefault, defaultLanguage().createCFString().get())); |
| return CFStringIsHyphenationAvailableForLocale(locale.get()) ? locale : nullptr; |
| } |
| |
| static RetainPtr<CFLocaleRef> createValueForKey(const AtomString& localeIdentifier) |
| { |
| RetainPtr<CFLocaleRef> locale = adoptCF(CFLocaleCreate(kCFAllocatorDefault, localeIdentifier.string().createCFString().get())); |
| |
| return CFStringIsHyphenationAvailableForLocale(locale.get()) ? locale : nullptr; |
| } |
| }; |
| } |
| |
| namespace WebCore { |
| |
| bool canHyphenate(const AtomString& localeIdentifier) |
| { |
| return TinyLRUCachePolicy<AtomString, RetainPtr<CFLocaleRef>>::cache().get(localeIdentifier); |
| } |
| |
| size_t lastHyphenLocation(StringView text, size_t beforeIndex, const AtomString& localeIdentifier) |
| { |
| RetainPtr<CFLocaleRef> locale = TinyLRUCachePolicy<AtomString, RetainPtr<CFLocaleRef>>::cache().get(localeIdentifier); |
| |
| CFOptionFlags searchAcrossWordBoundaries = 1; |
| CFIndex result = CFStringGetHyphenationLocationBeforeIndex(text.createCFStringWithoutCopying().get(), beforeIndex, CFRangeMake(0, text.length()), searchAcrossWordBoundaries, locale.get(), nullptr); |
| return result == kCFNotFound ? 0 : result; |
| } |
| |
| } // namespace WebCore |