mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 14:45:29 +00:00
497 lines
19 KiB
C++
497 lines
19 KiB
C++
/*
|
|
********************************************************************************
|
|
* *
|
|
* COPYRIGHT: *
|
|
* (C) Copyright Taligent, Inc., 1997 *
|
|
* (C) Copyright International Business Machines Corporation, 1997 *
|
|
* Licensed Material - Program-Property of IBM - All Rights Reserved. *
|
|
* US Government Users Restricted Rights - Use, duplication, or disclosure *
|
|
* restricted by GSA ADP Schedule Contract with IBM Corp. *
|
|
* *
|
|
********************************************************************************
|
|
*
|
|
* File DATEFMT.H
|
|
*
|
|
* Modification History:
|
|
*
|
|
* Date Name Description
|
|
* 02/19/97 aliu Converted from java.
|
|
* 04/01/97 aliu Added support for centuries.
|
|
********************************************************************************
|
|
*/
|
|
|
|
#ifndef _DATEFMT
|
|
#define _DATEFMT
|
|
|
|
#include "ptypes.h"
|
|
#include "calendar.h"
|
|
#include "numfmt.h"
|
|
#include "format.h"
|
|
#include "locid.h"
|
|
class TimeZone;
|
|
|
|
/**
|
|
* DateFormat is an abstract class for a family of classes that convert dates and
|
|
* times from their internal representations to textual form and back again in a
|
|
* language-independent manner. Converting from the internal representation (milliseconds
|
|
* since midnight, January 1, 1970) to text is known as "formatting," and converting
|
|
* from text to millis is known as "parsing." We currently define only one concrete
|
|
* subclass of DateFormat: SimpleDateFormat, which can handle pretty much all normal
|
|
* date formatting and parsing actions.
|
|
* <P>
|
|
* DateFormat helps you to format and parse dates for any locale. Your code can
|
|
* be completely independent of the locale conventions for months, days of the
|
|
* week, or even the calendar format: lunar vs. solar.
|
|
* <P>
|
|
* To format a date for the current Locale, use one of the static factory
|
|
* methods:
|
|
* <pre>
|
|
* . UnicodeString myString;
|
|
* . DateFormat* df(DateFormat::createDateInstance());
|
|
* . df->format(myDate, myString);
|
|
* . delete df;
|
|
* </pre>
|
|
* If you are formatting multiple numbers, it is more efficient to get the
|
|
* format and use it multiple times so that the system doesn't have to fetch the
|
|
* information about the local language and country conventions multiple times.
|
|
* <pre>
|
|
* . Date a[a_length];
|
|
* . UnicodeString myString;
|
|
* . DateFormat* df(DateFormat::createDateInstance());
|
|
* . for (int i = 0; i < a_length; ++i) {
|
|
* . cout << df->format(myDate[i], myString) << "; ";
|
|
* . }
|
|
* . delete df;
|
|
* </pre>
|
|
* To format a date for a different Locale, specify it in the call to
|
|
* getDateInstance().
|
|
* <pre>
|
|
* . DateFormat* df(DateFormat::getDateInstance(Locale.FRANCE));
|
|
* </pre>
|
|
* You can use a DateFormat to parse also.
|
|
* <pre>
|
|
* . ErrorCode status = ZERO_ERROR;
|
|
* . Formattable* myDate = df.parse(myString, status);
|
|
* </pre>
|
|
* Use createDateInstance() to produce the normal date format for that country.
|
|
* There are other static factory methods available. Use createTimeInstance()
|
|
* to produce the normal time format for that country. Use createDateTimeInstance()
|
|
* to produce a DateFormat that formats both date and time. You can pass in
|
|
* different options to these factory methods to control the length of the
|
|
* result; from SHORT to MEDIUM to LONG to FULL. The exact result depends on the
|
|
* locale, but generally:
|
|
* <ul type=round>
|
|
* <li> SHORT is completely numeric, such as 12/13/52 or 3:30pm
|
|
* <li> MEDIUM is longer, such as Jan 12, 1952
|
|
* <li> LONG is longer, such as January 12, 1952 or 3:30:32pm
|
|
* <li> FULL is pretty completely specified, such as
|
|
* Tuesday, April 12, 1952 AD or 3:30:42pm PST.
|
|
* </ul>
|
|
* You can also set the time zone on the format if you wish. If you want even
|
|
* more control over the format or parsing, (or want to give your users more
|
|
* control), you can try casting the DateFormat you get from the factory methods
|
|
* to a SimpleDateFormat. This will work for the majority of countries; just
|
|
* remember to chck getDynamicClassID() before carrying out the cast.
|
|
* <P>
|
|
* You can also use forms of the parse and format methods with ParsePosition and
|
|
* FieldPosition to allow you to
|
|
* <ul type=round>
|
|
* <li> Progressively parse through pieces of a string.
|
|
* <li> Align any particular field, or find out where it is for selection
|
|
* on the screen.
|
|
* </ul>
|
|
*/
|
|
|
|
#ifdef NLS_MAC
|
|
#pragma export on
|
|
#endif
|
|
|
|
class T_FORMAT_API DateFormat : public Format {
|
|
public:
|
|
/**
|
|
* The following enum values are used in FieldPosition with date/time formatting.
|
|
* They are also used to index into DateFormatSymbols::fgPatternChars, which
|
|
* is the list of standard internal-representation pattern characters, and
|
|
* the resource bundle localPatternChars data. For this reason, this enum
|
|
* should be treated with care; don't change the order or contents of it
|
|
* unless you really know what you are doing. You'll probably have to change
|
|
* the code in DateFormatSymbols, SimpleDateFormat, and all the locale
|
|
* resource bundle data files.
|
|
*/
|
|
enum EField
|
|
{
|
|
ERA_FIELD, // ERA field alignment.
|
|
YEAR_FIELD, // YEAR field alignment.
|
|
MONTH_FIELD, // MONTH field alignment.
|
|
DATE_FIELD, // DATE field alignment.
|
|
HOUR_OF_DAY1_FIELD, // One-based HOUR_OF_DAY field alignment.
|
|
// HOUR_OF_DAY1_FIELD is used for the one-based 24-hour clock.
|
|
// For example, 23:59 + 01:00 results in 24:59.
|
|
HOUR_OF_DAY0_FIELD, // Zero-based HOUR_OF_DAY field alignment.
|
|
// HOUR_OF_DAY0_FIELD is used for the zero-based 24-hour clock.
|
|
// For example, 23:59 + 01:00 results in 00:59.
|
|
MINUTE_FIELD, // MINUTE field alignment.
|
|
SECOND_FIELD, // SECOND field alignment.
|
|
MILLISECOND_FIELD, // MILLISECOND field alignment.
|
|
DAY_OF_WEEK_FIELD, // DAY_OF_WEEK field alignment.
|
|
DAY_OF_YEAR_FIELD, // DAY_OF_YEAR field alignment.
|
|
DAY_OF_WEEK_IN_MONTH_FIELD,// DAY_OF_WEEK_IN_MONTH field alignment.
|
|
WEEK_OF_YEAR_FIELD, // WEEK_OF_YEAR field alignment.
|
|
WEEK_OF_MONTH_FIELD,// WEEK_OF_MONTH field alignment.
|
|
AM_PM_FIELD, // AM_PM field alignment.
|
|
HOUR1_FIELD, // One-based HOUR field alignment.
|
|
// HOUR1_FIELD is used for the one-based 12-hour clock.
|
|
// For example, 11:30 PM + 1 hour results in 12:30 AM.
|
|
HOUR0_FIELD, // Zero-based HOUR field alignment.
|
|
// HOUR0_FIELD is used for the zero-based 12-hour clock.
|
|
// For example, 11:30 PM + 1 hour results in 00:30 AM.
|
|
TIMEZONE_FIELD // TIMEZONE field alignment.
|
|
};
|
|
|
|
/**
|
|
* Constants for various style patterns. These reflect the order of items in
|
|
* the DateTimePatterns resource. There are 4 time patterns, 4 date patterns,
|
|
* and then the date-time pattern. Each block of 4 values in the resource occurs
|
|
* in the order full, long, medium, short.
|
|
*/
|
|
|
|
enum EStyle
|
|
{
|
|
FULL,
|
|
LONGG,
|
|
MEDIUM,
|
|
SHORT,
|
|
|
|
DEFAULT = MEDIUM,
|
|
DATE_OFFSET = 4,
|
|
NONE = -1,
|
|
DATE_TIME = 8
|
|
};
|
|
|
|
typedef enum EStyle EStyle;
|
|
/**
|
|
* Destructor.
|
|
*/
|
|
virtual ~DateFormat();
|
|
|
|
/**
|
|
* Equality operator. Returns true if the two formats have the same behavior.
|
|
*/
|
|
virtual t_bool operator==(const Format&) const;
|
|
|
|
/**
|
|
* Format an object to produce a string. This method handles Formattable
|
|
* objects with a Date type. If a the Formattable object type is not a Date,
|
|
* then it returns a failing ErrorCode.
|
|
*
|
|
* @param obj The object to format. Must be a Date.
|
|
* @param toAppendTo The result of the formatting operation is appended to
|
|
* this string.
|
|
* @param pos On input: an alignment field, if desired.
|
|
* On output: the offsets of the alignment field.
|
|
* @param status Output param filled with success/failure status.
|
|
* @return The value passed in as toAppendTo (this allows chaining,
|
|
* as with UnicodeString::append())
|
|
*/
|
|
virtual UnicodeString& format(const Formattable& obj,
|
|
UnicodeString& toAppendTo,
|
|
FieldPosition& pos,
|
|
ErrorCode& status) const;
|
|
|
|
/**
|
|
* Formats a Date into a date/time string. This is an abstract method which
|
|
* concrete subclasses must implement.
|
|
* <P>
|
|
* On input, the FieldPosition parameter may have its "field" member filled with
|
|
* an enum value specifying a field. On output, the FieldPosition will be filled
|
|
* in with the text offsets for that field.
|
|
* <P> For example, given a time text
|
|
* "1996.07.10 AD at 15:08:56 PDT", if the given fieldPosition.field is
|
|
* DateFormat::YEAR_FIELD, the offsets fieldPosition.beginIndex and
|
|
* statfieldPositionus.getEndIndex will be set to 0 and 4, respectively.
|
|
* <P> Notice
|
|
* that if the same time field appears more than once in a pattern, the status will
|
|
* be set for the first occurence of that time field. For instance,
|
|
* formatting a Date to the time string "1 PM PDT (Pacific Daylight Time)"
|
|
* using the pattern "h a z (zzzz)" and the alignment field
|
|
* DateFormat::TIMEZONE_FIELD, the offsets fieldPosition.beginIndex and
|
|
* fieldPosition.getEndIndex will be set to 5 and 8, respectively, for the first
|
|
* occurence of the timezone pattern character 'z'.
|
|
*
|
|
* @param date a Date to be formatted into a date/time string.
|
|
* @param toAppendTo the result of the formatting operation is appended to
|
|
* the end of this string.
|
|
* @param fieldPosition On input: an alignment field, if desired (see examples above)
|
|
* On output: the offsets of the alignment field (see examples above)
|
|
* @return A reference to 'toAppendTo'.
|
|
*/
|
|
virtual UnicodeString& format( Date date,
|
|
UnicodeString& toAppendTo,
|
|
FieldPosition& fieldPosition) const = 0;
|
|
|
|
/**
|
|
* Formats a Date into a date/time string. If there is a problem, you won't
|
|
* know, using this method. Use the overloaded format() method which takes a
|
|
* FieldPosition& to detect formatting problems.
|
|
*
|
|
* @param date The Date value to be formatted into a string.
|
|
* @param result Output param which will receive the formatted date.
|
|
* @return A reference to 'result'.
|
|
*/
|
|
UnicodeString& format(Date date, UnicodeString& result) const;
|
|
|
|
/**
|
|
* Parse a date/time string.
|
|
*
|
|
* @param text The string to be parsed into a Date value.
|
|
* @param status Output param to be set to success/failure code. If
|
|
* 'text' cannot be parsed, it will be set to a failure
|
|
* code.
|
|
* @result The parsed Date value, if successful.
|
|
*/
|
|
virtual Date parse( const UnicodeString& text,
|
|
ErrorCode& status) const;
|
|
|
|
/**
|
|
* Parse a date/time string beginning at the given parse position. For
|
|
* example, a time text "07/10/96 4:5 PM, PDT" will be parsed into a Date
|
|
* that is equivalent to Date(837039928046).
|
|
* <P>
|
|
* By default, parsing is lenient: If the input is not in the form used by
|
|
* this object's format method but can still be parsed as a date, then the
|
|
* parse succeeds. Clients may insist on strict adherence to the format by
|
|
* calling setLenient(false).
|
|
*
|
|
* @see DateFormat::setLenient(boolean)
|
|
*
|
|
* @param text The date/time string to be parsed
|
|
* @param pos On input, the position at which to start parsing; on
|
|
* output, the position at which parsing terminated, or the
|
|
* start position if the parse failed.
|
|
* @return A valid Date if the input could be parsed.
|
|
*/
|
|
virtual Date parse( const UnicodeString& text,
|
|
ParsePosition& pos) const = 0;
|
|
|
|
/**
|
|
* Parse a string to produce an object. This methods handles parsing of
|
|
* date/time strings into Formattable objects with Date types.
|
|
* <P>
|
|
* Before calling, set parse_pos.index to the offset you want to start
|
|
* parsing at in the source. After calling, parse_pos.index is the end of
|
|
* the text you parsed. If error occurs, index is unchanged.
|
|
* <P>
|
|
* When parsing, leading whitespace is discarded (with a successful parse),
|
|
* while trailing whitespace is left as is.
|
|
* <P>
|
|
* See Format::parseObject() for more.
|
|
*
|
|
* @param source The string to be parsed into an object.
|
|
* @param result Formattable to be set to the parse result.
|
|
* If parse fails, return contents are undefined.
|
|
* @param parse_pos The position to start parsing at. Upon return
|
|
* this param is set to the position after the
|
|
* last character successfully parsed. If the
|
|
* source is not parsed successfully, this param
|
|
* will remain unchanged.
|
|
* @return A newly created Formattable* object, or NULL
|
|
* on failure. The caller owns this and should
|
|
* delete it when done.
|
|
*/
|
|
virtual void parseObject(const UnicodeString& source,
|
|
Formattable& result,
|
|
ParsePosition& parse_pos) const;
|
|
|
|
/**
|
|
* Create a default date/time formatter that uses the SHORT style for both
|
|
* the date and the time.
|
|
*
|
|
* @return A date/time formatter which the caller owns.
|
|
*/
|
|
static DateFormat* createInstance();
|
|
|
|
/**
|
|
* Creates a time formatter with the given formatting style for the given
|
|
* locale.
|
|
*
|
|
* @param style The given formatting style. For example,
|
|
* SHORT for "h:mm a" in the US locale.
|
|
* @param aLocale The given locale.
|
|
* @return A time formatter which the caller owns.
|
|
*/
|
|
static DateFormat* createTimeInstance(EStyle style = DEFAULT,
|
|
const Locale& aLocale = Locale::getDefault());
|
|
|
|
/**
|
|
* Creates a date formatter with the given formatting style for the given
|
|
* const locale.
|
|
*
|
|
* @param style The given formatting style. For example,
|
|
* SHORT for "M/d/yy" in the US locale.
|
|
* @param aLocale The given locale.
|
|
* @return A date formatter which the caller owns.
|
|
*/
|
|
static DateFormat* createDateInstance(EStyle style = DEFAULT,
|
|
const Locale& aLocale = Locale::getDefault());
|
|
|
|
/**
|
|
* Creates a date/time formatter with the given formatting styles for the
|
|
* given locale.
|
|
*
|
|
* @param dateStyle The given formatting style for the date portion of the result.
|
|
* For example, SHORT for "M/d/yy" in the US locale.
|
|
* @param timeStyle The given formatting style for the time portion of the result.
|
|
* For example, SHORT for "h:mm a" in the US locale.
|
|
* @param aLocale The given locale.
|
|
* @return A date/time formatter which the caller owns.
|
|
*/
|
|
static DateFormat* createDateTimeInstance(EStyle dateStyle = DEFAULT,
|
|
EStyle timeStyle = DEFAULT,
|
|
const Locale& aLocale = Locale::getDefault());
|
|
|
|
/**
|
|
* Gets the set of locales for which DateFormats are installed.
|
|
* @param count Filled in with the number of locales in the list that is returned.
|
|
* @return the set of locales for which DateFormats are installed. The caller
|
|
* does NOT own this list and must not delete it.
|
|
*/
|
|
static const Locale* getAvailableLocales(t_int32& count);
|
|
|
|
/**
|
|
* Returns true if the formatter is set for lenient parsing.
|
|
*/
|
|
virtual t_bool isLenient() const;
|
|
|
|
/**
|
|
* Specify whether or not date/time parsing is to be lenient. With lenient
|
|
* parsing, the parser may use heuristics to interpret inputs that do not
|
|
* precisely match this object's format. With strict parsing, inputs must
|
|
* match this object's format.
|
|
* @see Calendar::setLenient
|
|
*/
|
|
virtual void setLenient(t_bool lenient);
|
|
|
|
/**
|
|
* Gets the calendar associated with this date/time formatter.
|
|
* @return the calendar associated with this date/time formatter.
|
|
*/
|
|
virtual const Calendar* getCalendar() const;
|
|
|
|
/**
|
|
* Set the calendar to be used by this date format. Initially, the default
|
|
* calendar for the specified or default locale is used. The caller should
|
|
* not delete the Calendar object after it is adopted by this call.
|
|
*/
|
|
virtual void adoptCalendar(Calendar* calendarToAdopt);
|
|
|
|
/**
|
|
* Set the calendar to be used by this date format. Initially, the default
|
|
* calendar for the specified or default locale is used.
|
|
*/
|
|
virtual void setCalendar(const Calendar& newCalendar);
|
|
|
|
|
|
/**
|
|
* Gets the number formatter which this date/time formatter uses to format
|
|
* and parse the numeric portions of the pattern.
|
|
* @return the number formatter which this date/time formatter uses.
|
|
*/
|
|
virtual const NumberFormat* getNumberFormat() const;
|
|
|
|
/**
|
|
* Allows you to set the number formatter. The caller should
|
|
* not delete the NumberFormat object after it is adopted by this call.
|
|
* @param formatToAdopt NumberFormat object to be adopted.
|
|
*/
|
|
virtual void adoptNumberFormat(NumberFormat* formatToAdopt);
|
|
|
|
/**
|
|
* Allows you to set the number formatter.
|
|
* @param formatToAdopt NumberFormat object to be adopted.
|
|
*/
|
|
virtual void setNumberFormat(const NumberFormat& newNumberFormat);
|
|
|
|
/**
|
|
* Returns a reference to the TimeZone used by this DateFormat's calendar.
|
|
* @return the time zone associated with the calendar of DateFormat.
|
|
*/
|
|
virtual const TimeZone& getTimeZone() const;
|
|
|
|
/**
|
|
* Sets the time zone for the calendar of this DateFormat object. The caller
|
|
* no longer owns the TimeZone object and should not delete it after this call.
|
|
* @param zone the new time zone.
|
|
*/
|
|
virtual void adoptTimeZone(TimeZone* zoneToAdopt);
|
|
|
|
/**
|
|
* Sets the time zone for the calendar of this DateFormat object.
|
|
* @param zone the new time zone.
|
|
*/
|
|
virtual void setTimeZone(const TimeZone& zone);
|
|
|
|
|
|
protected:
|
|
/**
|
|
* Default constructor. Creates a DateFormat with no Calendar or NumberFormat
|
|
* associated with it. This constructor depends on the subclasses to fill in
|
|
* the calendar and numberFormat fields.
|
|
*/
|
|
DateFormat();
|
|
|
|
/**
|
|
* Copy constructor.
|
|
*/
|
|
DateFormat(const DateFormat&);
|
|
|
|
/**
|
|
* Default assignment operator.
|
|
*/
|
|
DateFormat& operator=(const DateFormat&);
|
|
|
|
/**
|
|
* The calendar that DateFormat uses to produce the time field values needed
|
|
* to implement date/time formatting. Subclasses should generally initialize
|
|
* this to the default calendar for the locale associated with this DateFormat.
|
|
*/
|
|
Calendar* fCalendar;
|
|
|
|
/**
|
|
* The number formatter that DateFormat uses to format numbers in dates and
|
|
* times. Subclasses should generally initialize this to the default number
|
|
* format for the locale associated with this DateFormat.
|
|
*/
|
|
NumberFormat* fNumberFormat;
|
|
|
|
private:
|
|
/**
|
|
* Gets the date/time formatter with the given formatting styles for the
|
|
* given locale.
|
|
* @param dateStyle the given date formatting style.
|
|
* @param timeStyle the given time formatting style.
|
|
* @param inLocale the given locale.
|
|
* @return a date/time formatter, or 0 on failure.
|
|
*/
|
|
static DateFormat* create(EStyle timeStyle, EStyle dateStyle, const Locale&);
|
|
|
|
/**
|
|
* fgLocales and fgLocalesCount cache the available locales array that is returned
|
|
* by getAvailableLocales().
|
|
*/
|
|
static t_int32 fgLocalesCount;
|
|
|
|
/**
|
|
* fgLocales and fgLocalesCount cache the available locales array that is returned
|
|
* by getAvailableLocales().
|
|
*/
|
|
static const Locale* fgLocales;
|
|
};
|
|
|
|
#ifdef NLS_MAC
|
|
#pragma export off
|
|
#endif
|
|
|
|
|
|
#endif // _DATEFMT
|
|
//eof
|