1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "Hyphenation.h"
28
29#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
30
31#include "AtomicStringKeyedMRUCache.h"
32#include "TextBreakIteratorInternalICU.h"
33#include <wtf/ListHashSet.h>
34#include <wtf/RetainPtr.h>
35
36namespace WebCore {
37
38#if !PLATFORM(WIN) || (defined(MAC_OS_X_VERSION_10_7) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
39
40template<>
41RetainPtr<CFLocaleRef> AtomicStringKeyedMRUCache<RetainPtr<CFLocaleRef> >::createValueForNullKey()
42{
43    RetainPtr<CFLocaleRef> locale(AdoptCF, CFLocaleCopyCurrent());
44
45    return CFStringIsHyphenationAvailableForLocale(locale.get()) ? locale : 0;
46}
47
48template<>
49RetainPtr<CFLocaleRef> AtomicStringKeyedMRUCache<RetainPtr<CFLocaleRef> >::createValueForKey(const AtomicString& localeIdentifier)
50{
51    RetainPtr<CFStringRef> cfLocaleIdentifier(AdoptCF, localeIdentifier.createCFString());
52    RetainPtr<CFLocaleRef> locale(AdoptCF, CFLocaleCreate(kCFAllocatorDefault, cfLocaleIdentifier.get()));
53
54    return CFStringIsHyphenationAvailableForLocale(locale.get()) ? locale : 0;
55}
56
57static AtomicStringKeyedMRUCache<RetainPtr<CFLocaleRef> >& cfLocaleCache()
58{
59    DEFINE_STATIC_LOCAL(AtomicStringKeyedMRUCache<RetainPtr<CFLocaleRef> >, cache, ());
60    return cache;
61}
62
63bool canHyphenate(const AtomicString& localeIdentifier)
64{
65    return cfLocaleCache().get(localeIdentifier);
66}
67
68size_t lastHyphenLocation(const UChar* characters, size_t length, size_t beforeIndex, const AtomicString& localeIdentifier)
69{
70    RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, reinterpret_cast<const UniChar*>(characters), length, kCFAllocatorNull));
71
72    RetainPtr<CFLocaleRef> locale = cfLocaleCache().get(localeIdentifier);
73    ASSERT(locale);
74
75    CFIndex result = CFStringGetHyphenationLocationBeforeIndex(string.get(), beforeIndex, CFRangeMake(0, length), 0, locale.get(), 0);
76    return result == kCFNotFound ? 0 : result;
77}
78
79#else
80
81bool canHyphenate(const AtomicString&)
82{
83    return false;
84}
85
86size_t lastHyphenLocation(const UChar*, size_t, size_t, const AtomicString&)
87{
88    ASSERT_NOT_REACHED();
89    return 0;
90}
91
92#endif // PLATFORM(WIN) && (!defined(MAC_OS_X_VERSION_10_7) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7)
93
94} // namespace WebCore
95
96#endif // !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
97