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      1 /*
      2  * Copyright (C) 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
      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'' AND
     14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
     17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     20  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
     23  * DAMAGE.
     24  */
     25 
     26 #ifndef DateTimeFormat_h
     27 #define DateTimeFormat_h
     28 
     29 #include "wtf/Forward.h"
     30 
     31 namespace WebCore {
     32 
     33 // DateTimeFormat parses date time format defined in Unicode Technical
     34 // standard 35, Locale Data Markup Language (LDML)[1].
     35 // [1] LDML http://unicode.org/reports/tr35/tr35-6.html#Date_Format_Patterns
     36 class DateTimeFormat {
     37 public:
     38     enum FieldType {
     39         FieldTypeInvalid,
     40         FieldTypeLiteral,
     41 
     42         // Era: AD
     43         FieldTypeEra = 'G',
     44 
     45         // Year: 1996
     46         FieldTypeYear = 'y',
     47         FieldTypeYearOfWeekOfYear = 'Y',
     48         FieldTypeExtendedYear = 'u',
     49 
     50         // Quater: Q2
     51         FieldTypeQuater = 'Q',
     52         FieldTypeQuaterStandAlone = 'q',
     53 
     54         // Month: September
     55         FieldTypeMonth = 'M',
     56         FieldTypeMonthStandAlone = 'L',
     57 
     58         // Week: 42
     59         FieldTypeWeekOfYear = 'w',
     60         FieldTypeWeekOfMonth = 'W',
     61 
     62         // Day: 12
     63         FieldTypeDayOfMonth = 'd',
     64         FieldTypeDayOfYear = 'D',
     65         FieldTypeDayOfWeekInMonth = 'F',
     66         FieldTypeModifiedJulianDay = 'g',
     67 
     68         // Week Day: Tuesday
     69         FieldTypeDayOfWeek = 'E',
     70         FieldTypeLocalDayOfWeek = 'e',
     71         FieldTypeLocalDayOfWeekStandAlon = 'c',
     72 
     73         // Period: AM or PM
     74         FieldTypePeriod = 'a',
     75 
     76         // Hour: 7
     77         FieldTypeHour12 = 'h',
     78         FieldTypeHour23 = 'H',
     79         FieldTypeHour11 = 'K',
     80         FieldTypeHour24 = 'k',
     81 
     82         // Minute: 59
     83         FieldTypeMinute = 'm',
     84 
     85         // Second: 12
     86         FieldTypeSecond = 's',
     87         FieldTypeFractionalSecond = 'S',
     88         FieldTypeMillisecondsInDay = 'A',
     89 
     90         // Zone: PDT
     91         FieldTypeZone = 'z',
     92         FieldTypeRFC822Zone = 'Z',
     93         FieldTypeNonLocationZone = 'v',
     94     };
     95 
     96     class TokenHandler {
     97     public:
     98         virtual ~TokenHandler() { }
     99         virtual void visitField(FieldType, int numberOfPatternCharacters) = 0;
    100         virtual void visitLiteral(const String&) = 0;
    101     };
    102 
    103     // Returns true if succeeded, false if failed.
    104     static bool parse(const String&, TokenHandler&);
    105     static void quoteAndAppendLiteral(const String&, StringBuilder&);
    106 };
    107 
    108 } // namespace WebCore
    109 
    110 #endif // DateTimeFormat_h
    111