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      1 /*
      2  * Copyright (C) 2011,2012 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "platform/text/LocaleICU.h"
     33 
     34 #include <unicode/udatpg.h>
     35 #include <unicode/uloc.h>
     36 #include <limits>
     37 #include "wtf/DateMath.h"
     38 #include "wtf/PassOwnPtr.h"
     39 #include "wtf/text/StringBuffer.h"
     40 #include "wtf/text/StringBuilder.h"
     41 
     42 using namespace icu;
     43 using namespace std;
     44 
     45 namespace WebCore {
     46 
     47 PassOwnPtr<Locale> Locale::create(const String& locale)
     48 {
     49     return LocaleICU::create(locale.utf8().data());
     50 }
     51 
     52 LocaleICU::LocaleICU(const char* locale)
     53     : m_locale(locale)
     54     , m_numberFormat(0)
     55     , m_shortDateFormat(0)
     56     , m_didCreateDecimalFormat(false)
     57     , m_didCreateShortDateFormat(false)
     58     , m_firstDayOfWeek(0)
     59     , m_mediumTimeFormat(0)
     60     , m_shortTimeFormat(0)
     61     , m_didCreateTimeFormat(false)
     62 {
     63 }
     64 
     65 LocaleICU::~LocaleICU()
     66 {
     67     unum_close(m_numberFormat);
     68     udat_close(m_shortDateFormat);
     69     udat_close(m_mediumTimeFormat);
     70     udat_close(m_shortTimeFormat);
     71 }
     72 
     73 PassOwnPtr<LocaleICU> LocaleICU::create(const char* localeString)
     74 {
     75     return adoptPtr(new LocaleICU(localeString));
     76 }
     77 
     78 String LocaleICU::decimalSymbol(UNumberFormatSymbol symbol)
     79 {
     80     UErrorCode status = U_ZERO_ERROR;
     81     int32_t bufferLength = unum_getSymbol(m_numberFormat, symbol, 0, 0, &status);
     82     ASSERT(U_SUCCESS(status) || status == U_BUFFER_OVERFLOW_ERROR);
     83     if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
     84         return String();
     85     StringBuffer<UChar> buffer(bufferLength);
     86     status = U_ZERO_ERROR;
     87     unum_getSymbol(m_numberFormat, symbol, buffer.characters(), bufferLength, &status);
     88     if (U_FAILURE(status))
     89         return String();
     90     return String::adopt(buffer);
     91 }
     92 
     93 String LocaleICU::decimalTextAttribute(UNumberFormatTextAttribute tag)
     94 {
     95     UErrorCode status = U_ZERO_ERROR;
     96     int32_t bufferLength = unum_getTextAttribute(m_numberFormat, tag, 0, 0, &status);
     97     ASSERT(U_SUCCESS(status) || status == U_BUFFER_OVERFLOW_ERROR);
     98     if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
     99         return String();
    100     StringBuffer<UChar> buffer(bufferLength);
    101     status = U_ZERO_ERROR;
    102     unum_getTextAttribute(m_numberFormat, tag, buffer.characters(), bufferLength, &status);
    103     ASSERT(U_SUCCESS(status));
    104     if (U_FAILURE(status))
    105         return String();
    106     return String::adopt(buffer);
    107 }
    108 
    109 void LocaleICU::initializeLocaleData()
    110 {
    111     if (m_didCreateDecimalFormat)
    112         return;
    113     m_didCreateDecimalFormat = true;
    114     UErrorCode status = U_ZERO_ERROR;
    115     m_numberFormat = unum_open(UNUM_DECIMAL, 0, 0, m_locale.data(), 0, &status);
    116     if (!U_SUCCESS(status))
    117         return;
    118 
    119     Vector<String, DecimalSymbolsSize> symbols;
    120     symbols.append(decimalSymbol(UNUM_ZERO_DIGIT_SYMBOL));
    121     symbols.append(decimalSymbol(UNUM_ONE_DIGIT_SYMBOL));
    122     symbols.append(decimalSymbol(UNUM_TWO_DIGIT_SYMBOL));
    123     symbols.append(decimalSymbol(UNUM_THREE_DIGIT_SYMBOL));
    124     symbols.append(decimalSymbol(UNUM_FOUR_DIGIT_SYMBOL));
    125     symbols.append(decimalSymbol(UNUM_FIVE_DIGIT_SYMBOL));
    126     symbols.append(decimalSymbol(UNUM_SIX_DIGIT_SYMBOL));
    127     symbols.append(decimalSymbol(UNUM_SEVEN_DIGIT_SYMBOL));
    128     symbols.append(decimalSymbol(UNUM_EIGHT_DIGIT_SYMBOL));
    129     symbols.append(decimalSymbol(UNUM_NINE_DIGIT_SYMBOL));
    130     symbols.append(decimalSymbol(UNUM_DECIMAL_SEPARATOR_SYMBOL));
    131     symbols.append(decimalSymbol(UNUM_GROUPING_SEPARATOR_SYMBOL));
    132     ASSERT(symbols.size() == DecimalSymbolsSize);
    133     setLocaleData(symbols, decimalTextAttribute(UNUM_POSITIVE_PREFIX), decimalTextAttribute(UNUM_POSITIVE_SUFFIX), decimalTextAttribute(UNUM_NEGATIVE_PREFIX), decimalTextAttribute(UNUM_NEGATIVE_SUFFIX));
    134 }
    135 
    136 bool LocaleICU::initializeShortDateFormat()
    137 {
    138     if (m_didCreateShortDateFormat)
    139         return m_shortDateFormat;
    140     m_shortDateFormat = openDateFormat(UDAT_NONE, UDAT_SHORT);
    141     m_didCreateShortDateFormat = true;
    142     return m_shortDateFormat;
    143 }
    144 
    145 UDateFormat* LocaleICU::openDateFormat(UDateFormatStyle timeStyle, UDateFormatStyle dateStyle) const
    146 {
    147     const UChar gmtTimezone[3] = {'G', 'M', 'T'};
    148     UErrorCode status = U_ZERO_ERROR;
    149     return udat_open(timeStyle, dateStyle, m_locale.data(), gmtTimezone, WTF_ARRAY_LENGTH(gmtTimezone), 0, -1, &status);
    150 }
    151 
    152 static String getDateFormatPattern(const UDateFormat* dateFormat)
    153 {
    154     if (!dateFormat)
    155         return emptyString();
    156 
    157     UErrorCode status = U_ZERO_ERROR;
    158     int32_t length = udat_toPattern(dateFormat, TRUE, 0, 0, &status);
    159     if (status != U_BUFFER_OVERFLOW_ERROR || !length)
    160         return emptyString();
    161     StringBuffer<UChar> buffer(length);
    162     status = U_ZERO_ERROR;
    163     udat_toPattern(dateFormat, TRUE, buffer.characters(), length, &status);
    164     if (U_FAILURE(status))
    165         return emptyString();
    166     return String::adopt(buffer);
    167 }
    168 
    169 PassOwnPtr<Vector<String> > LocaleICU::createLabelVector(const UDateFormat* dateFormat, UDateFormatSymbolType type, int32_t startIndex, int32_t size)
    170 {
    171     if (!dateFormat)
    172         return PassOwnPtr<Vector<String> >();
    173     if (udat_countSymbols(dateFormat, type) != startIndex + size)
    174         return PassOwnPtr<Vector<String> >();
    175 
    176     OwnPtr<Vector<String> > labels = adoptPtr(new Vector<String>());
    177     labels->reserveCapacity(size);
    178     for (int32_t i = 0; i < size; ++i) {
    179         UErrorCode status = U_ZERO_ERROR;
    180         int32_t length = udat_getSymbols(dateFormat, type, startIndex + i, 0, 0, &status);
    181         if (status != U_BUFFER_OVERFLOW_ERROR)
    182             return PassOwnPtr<Vector<String> >();
    183         StringBuffer<UChar> buffer(length);
    184         status = U_ZERO_ERROR;
    185         udat_getSymbols(dateFormat, type, startIndex + i, buffer.characters(), length, &status);
    186         if (U_FAILURE(status))
    187             return PassOwnPtr<Vector<String> >();
    188         labels->append(String::adopt(buffer));
    189     }
    190     return labels.release();
    191 }
    192 
    193 static PassOwnPtr<Vector<String> > createFallbackWeekDayShortLabels()
    194 {
    195     OwnPtr<Vector<String> > labels = adoptPtr(new Vector<String>());
    196     labels->reserveCapacity(7);
    197     labels->append("Sun");
    198     labels->append("Mon");
    199     labels->append("Tue");
    200     labels->append("Wed");
    201     labels->append("Thu");
    202     labels->append("Fri");
    203     labels->append("Sat");
    204     return labels.release();
    205 }
    206 
    207 void LocaleICU::initializeCalendar()
    208 {
    209     if (m_weekDayShortLabels)
    210         return;
    211 
    212     if (!initializeShortDateFormat()) {
    213         m_firstDayOfWeek = 0;
    214         m_weekDayShortLabels = createFallbackWeekDayShortLabels();
    215         return;
    216     }
    217     m_firstDayOfWeek = ucal_getAttribute(udat_getCalendar(m_shortDateFormat), UCAL_FIRST_DAY_OF_WEEK) - UCAL_SUNDAY;
    218 
    219     m_weekDayShortLabels = createLabelVector(m_shortDateFormat, UDAT_SHORT_WEEKDAYS, UCAL_SUNDAY, 7);
    220     if (!m_weekDayShortLabels)
    221         m_weekDayShortLabels = createFallbackWeekDayShortLabels();
    222 }
    223 
    224 static PassOwnPtr<Vector<String> > createFallbackMonthLabels()
    225 {
    226     OwnPtr<Vector<String> > labels = adoptPtr(new Vector<String>());
    227     labels->reserveCapacity(WTF_ARRAY_LENGTH(WTF::monthFullName));
    228     for (unsigned i = 0; i < WTF_ARRAY_LENGTH(WTF::monthFullName); ++i)
    229         labels->append(WTF::monthFullName[i]);
    230     return labels.release();
    231 }
    232 
    233 const Vector<String>& LocaleICU::monthLabels()
    234 {
    235     if (m_monthLabels)
    236         return *m_monthLabels;
    237     if (initializeShortDateFormat()) {
    238         m_monthLabels = createLabelVector(m_shortDateFormat, UDAT_MONTHS, UCAL_JANUARY, 12);
    239         if (m_monthLabels)
    240             return *m_monthLabels;
    241     }
    242     m_monthLabels = createFallbackMonthLabels();
    243     return *m_monthLabels;
    244 }
    245 
    246 const Vector<String>& LocaleICU::weekDayShortLabels()
    247 {
    248     initializeCalendar();
    249     return *m_weekDayShortLabels;
    250 }
    251 
    252 unsigned LocaleICU::firstDayOfWeek()
    253 {
    254     initializeCalendar();
    255     return m_firstDayOfWeek;
    256 }
    257 
    258 bool LocaleICU::isRTL()
    259 {
    260     UErrorCode status = U_ZERO_ERROR;
    261     return uloc_getCharacterOrientation(m_locale.data(), &status) == ULOC_LAYOUT_RTL;
    262 }
    263 
    264 static PassOwnPtr<Vector<String> > createFallbackAMPMLabels()
    265 {
    266     OwnPtr<Vector<String> > labels = adoptPtr(new Vector<String>());
    267     labels->reserveCapacity(2);
    268     labels->append("AM");
    269     labels->append("PM");
    270     return labels.release();
    271 }
    272 
    273 void LocaleICU::initializeDateTimeFormat()
    274 {
    275     if (m_didCreateTimeFormat)
    276         return;
    277 
    278     // We assume ICU medium time pattern and short time pattern are compatible
    279     // with LDML, because ICU specific pattern character "V" doesn't appear
    280     // in both medium and short time pattern.
    281     m_mediumTimeFormat = openDateFormat(UDAT_MEDIUM, UDAT_NONE);
    282     m_timeFormatWithSeconds = getDateFormatPattern(m_mediumTimeFormat);
    283 
    284     m_shortTimeFormat = openDateFormat(UDAT_SHORT, UDAT_NONE);
    285     m_timeFormatWithoutSeconds = getDateFormatPattern(m_shortTimeFormat);
    286 
    287     UDateFormat* dateTimeFormatWithSeconds = openDateFormat(UDAT_MEDIUM, UDAT_SHORT);
    288     m_dateTimeFormatWithSeconds = getDateFormatPattern(dateTimeFormatWithSeconds);
    289     udat_close(dateTimeFormatWithSeconds);
    290 
    291     UDateFormat* dateTimeFormatWithoutSeconds = openDateFormat(UDAT_SHORT, UDAT_SHORT);
    292     m_dateTimeFormatWithoutSeconds = getDateFormatPattern(dateTimeFormatWithoutSeconds);
    293     udat_close(dateTimeFormatWithoutSeconds);
    294 
    295     OwnPtr<Vector<String> > timeAMPMLabels = createLabelVector(m_mediumTimeFormat, UDAT_AM_PMS, UCAL_AM, 2);
    296     if (!timeAMPMLabels)
    297         timeAMPMLabels = createFallbackAMPMLabels();
    298     m_timeAMPMLabels = *timeAMPMLabels;
    299 
    300     m_didCreateTimeFormat = true;
    301 }
    302 
    303 String LocaleICU::dateFormat()
    304 {
    305     if (!m_dateFormat.isNull())
    306         return m_dateFormat;
    307     if (!initializeShortDateFormat())
    308         return "yyyy-MM-dd";
    309     m_dateFormat = getDateFormatPattern(m_shortDateFormat);
    310     return m_dateFormat;
    311 }
    312 
    313 static String getFormatForSkeleton(const char* locale, const String& skeleton)
    314 {
    315     String format = "yyyy-MM";
    316     UErrorCode status = U_ZERO_ERROR;
    317     UDateTimePatternGenerator* patternGenerator = udatpg_open(locale, &status);
    318     if (!patternGenerator)
    319         return format;
    320     status = U_ZERO_ERROR;
    321     Vector<UChar> skeletonCharacters;
    322     skeleton.appendTo(skeletonCharacters);
    323     int32_t length = udatpg_getBestPattern(patternGenerator, skeletonCharacters.data(), skeletonCharacters.size(), 0, 0, &status);
    324     if (status == U_BUFFER_OVERFLOW_ERROR && length) {
    325         StringBuffer<UChar> buffer(length);
    326         status = U_ZERO_ERROR;
    327         udatpg_getBestPattern(patternGenerator, skeletonCharacters.data(), skeletonCharacters.size(), buffer.characters(), length, &status);
    328         if (U_SUCCESS(status))
    329             format = String::adopt(buffer);
    330     }
    331     udatpg_close(patternGenerator);
    332     return format;
    333 }
    334 
    335 String LocaleICU::monthFormat()
    336 {
    337     if (!m_monthFormat.isNull())
    338         return m_monthFormat;
    339     // Gets a format for "MMMM" because Windows API always provides formats for
    340     // "MMMM" in some locales.
    341     m_monthFormat = getFormatForSkeleton(m_locale.data(), "yyyyMMMM");
    342     return m_monthFormat;
    343 }
    344 
    345 String LocaleICU::shortMonthFormat()
    346 {
    347     if (!m_shortMonthFormat.isNull())
    348         return m_shortMonthFormat;
    349     m_shortMonthFormat = getFormatForSkeleton(m_locale.data(), "yyyyMMM");
    350     return m_shortMonthFormat;
    351 }
    352 
    353 String LocaleICU::timeFormat()
    354 {
    355     initializeDateTimeFormat();
    356     return m_timeFormatWithSeconds;
    357 }
    358 
    359 String LocaleICU::shortTimeFormat()
    360 {
    361     initializeDateTimeFormat();
    362     return m_timeFormatWithoutSeconds;
    363 }
    364 
    365 String LocaleICU::dateTimeFormatWithSeconds()
    366 {
    367     initializeDateTimeFormat();
    368     return m_dateTimeFormatWithSeconds;
    369 }
    370 
    371 String LocaleICU::dateTimeFormatWithoutSeconds()
    372 {
    373     initializeDateTimeFormat();
    374     return m_dateTimeFormatWithoutSeconds;
    375 }
    376 
    377 const Vector<String>& LocaleICU::shortMonthLabels()
    378 {
    379     if (!m_shortMonthLabels.isEmpty())
    380         return m_shortMonthLabels;
    381     if (initializeShortDateFormat()) {
    382         if (OwnPtr<Vector<String> > labels = createLabelVector(m_shortDateFormat, UDAT_SHORT_MONTHS, UCAL_JANUARY, 12)) {
    383             m_shortMonthLabels = *labels;
    384             return m_shortMonthLabels;
    385         }
    386     }
    387     m_shortMonthLabels.reserveCapacity(WTF_ARRAY_LENGTH(WTF::monthName));
    388     for (unsigned i = 0; i < WTF_ARRAY_LENGTH(WTF::monthName); ++i)
    389         m_shortMonthLabels.append(WTF::monthName[i]);
    390     return m_shortMonthLabels;
    391 }
    392 
    393 const Vector<String>& LocaleICU::standAloneMonthLabels()
    394 {
    395     if (!m_standAloneMonthLabels.isEmpty())
    396         return m_standAloneMonthLabels;
    397     if (initializeShortDateFormat()) {
    398         if (OwnPtr<Vector<String> > labels = createLabelVector(m_shortDateFormat, UDAT_STANDALONE_MONTHS, UCAL_JANUARY, 12)) {
    399             m_standAloneMonthLabels = *labels;
    400             return m_standAloneMonthLabels;
    401         }
    402     }
    403     m_standAloneMonthLabels = monthLabels();
    404     return m_standAloneMonthLabels;
    405 }
    406 
    407 const Vector<String>& LocaleICU::shortStandAloneMonthLabels()
    408 {
    409     if (!m_shortStandAloneMonthLabels.isEmpty())
    410         return m_shortStandAloneMonthLabels;
    411     if (initializeShortDateFormat()) {
    412         if (OwnPtr<Vector<String> > labels = createLabelVector(m_shortDateFormat, UDAT_STANDALONE_SHORT_MONTHS, UCAL_JANUARY, 12)) {
    413             m_shortStandAloneMonthLabels = *labels;
    414             return m_shortStandAloneMonthLabels;
    415         }
    416     }
    417     m_shortStandAloneMonthLabels = shortMonthLabels();
    418     return m_shortStandAloneMonthLabels;
    419 }
    420 
    421 const Vector<String>& LocaleICU::timeAMPMLabels()
    422 {
    423     initializeDateTimeFormat();
    424     return m_timeAMPMLabels;
    425 }
    426 
    427 } // namespace WebCore
    428 
    429