wtf/unicode/icu/CollatorICU.cpp

   1 /*
   2  * Copyright (C) 2008 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  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "config.h"
  30 #include "Collator.h"
  31
  32 #if USE(ICU_UNICODE) && !UCONFIG_NO_COLLATION
  33
  34 #include "Assertions.h"
  35 #include "Threading.h"
  36 #include <unicode/ucol.h>
  37 #include <string.h>
  38
  39 #if PLATFORM(DARWIN)
  40 #include <CoreFoundation/CoreFoundation.h>
  41 #endif
  42
  43 namespace WTF {
  44
  45 static UCollator* cachedCollator;
  46 static Mutex& cachedCollatorMutex()
  47 {
  48     AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
  49     return mutex;
  50 }
  51
  52 Collator::Collator(const char* locale)
  53     : m_collator(0)
  54     , m_locale(locale ? strdup(locale) : 0)
  55     , m_lowerFirst(false)
  56 {
  57 }
  58
  59 std::auto_ptr<Collator> Collator::userDefault()
  60 {
  61 #if PLATFORM(DARWIN) && PLATFORM(CF)
  62     // Mac OS X doesn't set UNIX locale to match user-selected one, so ICU default doesn't work.
  63     CFStringRef collationOrder = (CFStringRef)CFPreferencesCopyValue(CFSTR("AppleCollationOrder"), kCFPreferencesAnyApplication, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);
  64     char buf[256];
  65     if (collationOrder) {
  66         CFStringGetCString(collationOrder, buf, sizeof(buf), kCFStringEncodingASCII);
  67         CFRelease(collationOrder);
  68         return std::auto_ptr<Collator>(new Collator(buf));
  69     } else
  70         return std::auto_ptr<Collator>(new Collator(""));
  71 #else
  72     return std::auto_ptr<Collator>(new Collator(0));
  73 #endif
  74 }
  75
  76 Collator::~Collator()
  77 {
  78     releaseCollator();
  79     free(m_locale);
  80 }
  81
  82 void Collator::setOrderLowerFirst(bool lowerFirst)
  83 {
  84     m_lowerFirst = lowerFirst;
  85 }
  86
  87 Collator::Result Collator::collate(const UChar* lhs, size_t lhsLength, const UChar* rhs, size_t rhsLength) const
  88 {
  89     if (!m_collator)
  90         createCollator();
  91
  92     return static_cast<Result>(ucol_strcoll(m_collator, lhs, lhsLength, rhs, rhsLength));
  93 }
  94
  95 void Collator::createCollator() const
  96 {
  97     ASSERT(!m_collator);
  98     UErrorCode status = U_ZERO_ERROR;
  99
 100     {
 101         Locker<Mutex> lock(cachedCollatorMutex());
 102         if (cachedCollator) {
 103             const char* cachedCollatorLocale = ucol_getLocaleByType(cachedCollator, ULOC_REQUESTED_LOCALE, &status);
 104             ASSERT(U_SUCCESS(status));
 105             ASSERT(cachedCollatorLocale);
 106
 107             UColAttributeValue cachedCollatorLowerFirst = ucol_getAttribute(cachedCollator, UCOL_CASE_FIRST, &status);
 108             ASSERT(U_SUCCESS(status));
 109
 110             // FIXME: default locale is never matched, because ucol_getLocaleByType returns the actual one used, not 0.
 111             if (m_locale && 0 == strcmp(cachedCollatorLocale, m_locale)
 112                 && ((UCOL_LOWER_FIRST == cachedCollatorLowerFirst && m_lowerFirst) || (UCOL_UPPER_FIRST == cachedCollatorLowerFirst && !m_lowerFirst))) {
 113                 m_collator = cachedCollator;
 114                 cachedCollator = 0;
 115                 return;
 116             }
 117         }
 118     }
 119
 120     m_collator = ucol_open(m_locale, &status);
 121     if (U_FAILURE(status)) {
 122         status = U_ZERO_ERROR;
 123         m_collator = ucol_open("", &status); // Fallback to Unicode Collation Algorithm.
 124     }
 125     ASSERT(U_SUCCESS(status));
 126
 127     ucol_setAttribute(m_collator, UCOL_CASE_FIRST, m_lowerFirst ? UCOL_LOWER_FIRST : UCOL_UPPER_FIRST, &status);
 128     ASSERT(U_SUCCESS(status));
 129 }
 130
 131 void Collator::releaseCollator()
 132 {
 133     {
 134         Locker<Mutex> lock(cachedCollatorMutex());
 135         if (cachedCollator)
 136             ucol_close(cachedCollator);
 137         cachedCollator = m_collator;
 138         m_collator  = 0;
 139     }
 140 }
 141
 142 }
 143
 144 #endif