| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ******************************************************************************* |
| * Copyright (C) 2008-2016, International Business Machines Corporation and |
| * others. All Rights Reserved. |
| ******************************************************************************* |
| * |
| * File DTITVINF.H |
| * |
| ******************************************************************************* |
| */ |
| |
| #ifndef __DTITVINF_H__ |
| #define __DTITVINF_H__ |
| |
| #include "unicode/utypes.h" |
| |
| /** |
| * \file |
| * \brief C++ API: Date/Time interval patterns for formatting date/time interval |
| */ |
| |
| #if !UCONFIG_NO_FORMATTING |
| |
| #include "unicode/udat.h" |
| #include "unicode/locid.h" |
| #include "unicode/ucal.h" |
| #include "unicode/dtptngen.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| /** |
| * DateIntervalInfo is a public class for encapsulating localizable |
| * date time interval patterns. It is used by DateIntervalFormat. |
| * |
| * <P> |
| * For most users, ordinary use of DateIntervalFormat does not need to create |
| * DateIntervalInfo object directly. |
| * DateIntervalFormat will take care of it when creating a date interval |
| * formatter when user pass in skeleton and locale. |
| * |
| * <P> |
| * For power users, who want to create their own date interval patterns, |
| * or want to re-set date interval patterns, they could do so by |
| * directly creating DateIntervalInfo and manupulating it. |
| * |
| * <P> |
| * Logically, the interval patterns are mappings |
| * from (skeleton, the_largest_different_calendar_field) |
| * to (date_interval_pattern). |
| * |
| * <P> |
| * A skeleton |
| * <ol> |
| * <li> |
| * only keeps the field pattern letter and ignores all other parts |
| * in a pattern, such as space, punctuations, and string literals. |
| * <li> |
| * hides the order of fields. |
| * <li> |
| * might hide a field's pattern letter length. |
| * |
| * For those non-digit calendar fields, the pattern letter length is |
| * important, such as MMM, MMMM, and MMMMM; EEE and EEEE, |
| * and the field's pattern letter length is honored. |
| * |
| * For the digit calendar fields, such as M or MM, d or dd, yy or yyyy, |
| * the field pattern length is ignored and the best match, which is defined |
| * in date time patterns, will be returned without honor the field pattern |
| * letter length in skeleton. |
| * </ol> |
| * |
| * <P> |
| * The calendar fields we support for interval formatting are: |
| * year, month, date, day-of-week, am-pm, hour, hour-of-day, and minute. |
| * Those calendar fields can be defined in the following order: |
| * year > month > date > am-pm > hour > minute |
| * |
| * The largest different calendar fields between 2 calendars is the |
| * first different calendar field in above order. |
| * |
| * For example: the largest different calendar fields between "Jan 10, 2007" |
| * and "Feb 20, 2008" is year. |
| * |
| * <P> |
| * There is a set of pre-defined static skeleton strings. |
| * There are pre-defined interval patterns for those pre-defined skeletons |
| * in locales' resource files. |
| * For example, for a skeleton UDAT_YEAR_ABBR_MONTH_DAY, which is "yMMMd", |
| * in en_US, if the largest different calendar field between date1 and date2 |
| * is "year", the date interval pattern is "MMM d, yyyy - MMM d, yyyy", |
| * such as "Jan 10, 2007 - Jan 10, 2008". |
| * If the largest different calendar field between date1 and date2 is "month", |
| * the date interval pattern is "MMM d - MMM d, yyyy", |
| * such as "Jan 10 - Feb 10, 2007". |
| * If the largest different calendar field between date1 and date2 is "day", |
| * the date interval pattern is "MMM d-d, yyyy", such as "Jan 10-20, 2007". |
| * |
| * For date skeleton, the interval patterns when year, or month, or date is |
| * different are defined in resource files. |
| * For time skeleton, the interval patterns when am/pm, or hour, or minute is |
| * different are defined in resource files. |
| * |
| * |
| * <P> |
| * There are 2 dates in interval pattern. For most locales, the first date |
| * in an interval pattern is the earlier date. There might be a locale in which |
| * the first date in an interval pattern is the later date. |
| * We use fallback format for the default order for the locale. |
| * For example, if the fallback format is "{0} - {1}", it means |
| * the first date in the interval pattern for this locale is earlier date. |
| * If the fallback format is "{1} - {0}", it means the first date is the |
| * later date. |
| * For a particular interval pattern, the default order can be overriden |
| * by prefixing "latestFirst:" or "earliestFirst:" to the interval pattern. |
| * For example, if the fallback format is "{0}-{1}", |
| * but for skeleton "yMMMd", the interval pattern when day is different is |
| * "latestFirst:d-d MMM yy", it means by default, the first date in interval |
| * pattern is the earlier date. But for skeleton "yMMMd", when day is different, |
| * the first date in "d-d MMM yy" is the later date. |
| * |
| * <P> |
| * The recommended way to create a DateIntervalFormat object is to pass in |
| * the locale. |
| * By using a Locale parameter, the DateIntervalFormat object is |
| * initialized with the pre-defined interval patterns for a given or |
| * default locale. |
| * <P> |
| * Users can also create DateIntervalFormat object |
| * by supplying their own interval patterns. |
| * It provides flexibility for power users. |
| * |
| * <P> |
| * After a DateIntervalInfo object is created, clients may modify |
| * the interval patterns using setIntervalPattern function as so desired. |
| * Currently, users can only set interval patterns when the following |
| * calendar fields are different: ERA, YEAR, MONTH, DATE, DAY_OF_MONTH, |
| * DAY_OF_WEEK, AM_PM, HOUR, HOUR_OF_DAY, and MINUTE. |
| * Interval patterns when other calendar fields are different is not supported. |
| * <P> |
| * DateIntervalInfo objects are cloneable. |
| * When clients obtain a DateIntervalInfo object, |
| * they can feel free to modify it as necessary. |
| * <P> |
| * DateIntervalInfo are not expected to be subclassed. |
| * Data for a calendar is loaded out of resource bundles. |
| * Through ICU 4.4, date interval patterns are only supported in the Gregorian |
| * calendar; non-Gregorian calendars are supported from ICU 4.4.1. |
| * @stable ICU 4.0 |
| **/ |
| |
| class U_I18N_API DateIntervalInfo U_FINAL : public UObject { |
| public: |
| /** |
| * Default constructor. |
| * It does not initialize any interval patterns except |
| * that it initialize default fall-back pattern as "{0} - {1}", |
| * which can be reset by setFallbackIntervalPattern(). |
| * It should be followed by setFallbackIntervalPattern() and |
| * setIntervalPattern(), |
| * and is recommended to be used only for power users who |
| * wants to create their own interval patterns and use them to create |
| * date interval formatter. |
| * @param status output param set to success/failure code on exit |
| * @internal ICU 4.0 |
| */ |
| DateIntervalInfo(UErrorCode& status); |
| |
| |
| /** |
| * Construct DateIntervalInfo for the given locale, |
| * @param locale the interval patterns are loaded from the appropriate calendar |
| * data (specified calendar or default calendar) in this locale. |
| * @param status output param set to success/failure code on exit |
| * @stable ICU 4.0 |
| */ |
| DateIntervalInfo(const Locale& locale, UErrorCode& status); |
| |
| |
| /** |
| * Copy constructor. |
| * @stable ICU 4.0 |
| */ |
| DateIntervalInfo(const DateIntervalInfo&); |
| |
| /** |
| * Assignment operator |
| * @stable ICU 4.0 |
| */ |
| DateIntervalInfo& operator=(const DateIntervalInfo&); |
| |
| /** |
| * Clone this object polymorphically. |
| * The caller owns the result and should delete it when done. |
| * @return a copy of the object |
| * @stable ICU 4.0 |
| */ |
| virtual DateIntervalInfo* clone(void) const; |
| |
| /** |
| * Destructor. |
| * It is virtual to be safe, but it is not designed to be subclassed. |
| * @stable ICU 4.0 |
| */ |
| virtual ~DateIntervalInfo(); |
| |
| |
| /** |
| * Return true if another object is semantically equal to this one. |
| * |
| * @param other the DateIntervalInfo object to be compared with. |
| * @return true if other is semantically equal to this. |
| * @stable ICU 4.0 |
| */ |
| virtual UBool operator==(const DateIntervalInfo& other) const; |
| |
| /** |
| * Return true if another object is semantically unequal to this one. |
| * |
| * @param other the DateIntervalInfo object to be compared with. |
| * @return true if other is semantically unequal to this. |
| * @stable ICU 4.0 |
| */ |
| UBool operator!=(const DateIntervalInfo& other) const; |
| |
| |
| |
| /** |
| * Provides a way for client to build interval patterns. |
| * User could construct DateIntervalInfo by providing a list of skeletons |
| * and their patterns. |
| * <P> |
| * For example: |
| * <pre> |
| * UErrorCode status = U_ZERO_ERROR; |
| * DateIntervalInfo dIntervalInfo = new DateIntervalInfo(); |
| * dIntervalInfo->setFallbackIntervalPattern("{0} ~ {1}"); |
| * dIntervalInfo->setIntervalPattern("yMd", UCAL_YEAR, "'from' yyyy-M-d 'to' yyyy-M-d", status); |
| * dIntervalInfo->setIntervalPattern("yMMMd", UCAL_MONTH, "'from' yyyy MMM d 'to' MMM d", status); |
| * dIntervalInfo->setIntervalPattern("yMMMd", UCAL_DAY, "yyyy MMM d-d", status, status); |
| * </pre> |
| * |
| * Restriction: |
| * Currently, users can only set interval patterns when the following |
| * calendar fields are different: ERA, YEAR, MONTH, DATE, DAY_OF_MONTH, |
| * DAY_OF_WEEK, AM_PM, HOUR, HOUR_OF_DAY, and MINUTE. |
| * Interval patterns when other calendar fields are different are |
| * not supported. |
| * |
| * @param skeleton the skeleton on which interval pattern based |
| * @param lrgDiffCalUnit the largest different calendar unit. |
| * @param intervalPattern the interval pattern on the largest different |
| * calendar unit. |
| * For example, if lrgDiffCalUnit is |
| * "year", the interval pattern for en_US when year |
| * is different could be "'from' yyyy 'to' yyyy". |
| * @param status output param set to success/failure code on exit |
| * @stable ICU 4.0 |
| */ |
| void setIntervalPattern(const UnicodeString& skeleton, |
| UCalendarDateFields lrgDiffCalUnit, |
| const UnicodeString& intervalPattern, |
| UErrorCode& status); |
| |
| /** |
| * Get the interval pattern given skeleton and |
| * the largest different calendar field. |
| * @param skeleton the skeleton |
| * @param field the largest different calendar field |
| * @param result output param to receive the pattern |
| * @param status output param set to success/failure code on exit |
| * @return a reference to 'result' |
| * @stable ICU 4.0 |
| */ |
| UnicodeString& getIntervalPattern(const UnicodeString& skeleton, |
| UCalendarDateFields field, |
| UnicodeString& result, |
| UErrorCode& status) const; |
| |
| /** |
| * Get the fallback interval pattern. |
| * @param result output param to receive the pattern |
| * @return a reference to 'result' |
| * @stable ICU 4.0 |
| */ |
| UnicodeString& getFallbackIntervalPattern(UnicodeString& result) const; |
| |
| |
| /** |
| * Re-set the fallback interval pattern. |
| * |
| * In construction, default fallback pattern is set as "{0} - {1}". |
| * And constructor taking locale as parameter will set the |
| * fallback pattern as what defined in the locale resource file. |
| * |
| * This method provides a way for user to replace the fallback pattern. |
| * |
| * @param fallbackPattern fall-back interval pattern. |
| * @param status output param set to success/failure code on exit |
| * @stable ICU 4.0 |
| */ |
| void setFallbackIntervalPattern(const UnicodeString& fallbackPattern, |
| UErrorCode& status); |
| |
| |
| /** Get default order -- whether the first date in pattern is later date |
| or not. |
| * return default date ordering in interval pattern. TRUE if the first date |
| * in pattern is later date, FALSE otherwise. |
| * @stable ICU 4.0 |
| */ |
| UBool getDefaultOrder() const; |
| |
| |
| /** |
| * ICU "poor man's RTTI", returns a UClassID for the actual class. |
| * |
| * @stable ICU 4.0 |
| */ |
| virtual UClassID getDynamicClassID() const; |
| |
| /** |
| * ICU "poor man's RTTI", returns a UClassID for this class. |
| * |
| * @stable ICU 4.0 |
| */ |
| static UClassID U_EXPORT2 getStaticClassID(); |
| |
| |
| private: |
| /** |
| * DateIntervalFormat will need access to |
| * getBestSkeleton(), parseSkeleton(), enum IntervalPatternIndex, |
| * and calendarFieldToPatternIndex(). |
| * |
| * Instead of making above public, |
| * make DateIntervalFormat a friend of DateIntervalInfo. |
| */ |
| friend class DateIntervalFormat; |
| |
| /** |
| * Internal struct used to load resource bundle data. |
| */ |
| struct DateIntervalSink; |
| |
| /** |
| * Following is for saving the interval patterns. |
| * We only support interval patterns on |
| * ERA, YEAR, MONTH, DAY, AM_PM, HOUR, and MINUTE |
| */ |
| enum IntervalPatternIndex |
| { |
| kIPI_ERA, |
| kIPI_YEAR, |
| kIPI_MONTH, |
| kIPI_DATE, |
| kIPI_AM_PM, |
| kIPI_HOUR, |
| kIPI_MINUTE, |
| kIPI_SECOND, |
| kIPI_MAX_INDEX |
| }; |
| public: |
| #ifndef U_HIDE_INTERNAL_API |
| /** |
| * Max index for stored interval patterns |
| * @internal ICU 4.4 |
| */ |
| enum { |
| kMaxIntervalPatternIndex = kIPI_MAX_INDEX |
| }; |
| #endif /* U_HIDE_INTERNAL_API */ |
| private: |
| |
| |
| /** |
| * Initialize the DateIntervalInfo from locale |
| * @param locale the given locale. |
| * @param status output param set to success/failure code on exit |
| */ |
| void initializeData(const Locale& locale, UErrorCode& status); |
| |
| |
| /* Set Interval pattern. |
| * |
| * It sets interval pattern into the hash map. |
| * |
| * @param skeleton skeleton on which the interval pattern based |
| * @param lrgDiffCalUnit the largest different calendar unit. |
| * @param intervalPattern the interval pattern on the largest different |
| * calendar unit. |
| * @param status output param set to success/failure code on exit |
| */ |
| void setIntervalPatternInternally(const UnicodeString& skeleton, |
| UCalendarDateFields lrgDiffCalUnit, |
| const UnicodeString& intervalPattern, |
| UErrorCode& status); |
| |
| |
| /**given an input skeleton, get the best match skeleton |
| * which has pre-defined interval pattern in resource file. |
| * Also return the difference between the input skeleton |
| * and the best match skeleton. |
| * |
| * TODO (xji): set field weight or |
| * isolate the funtionality in DateTimePatternGenerator |
| * @param skeleton input skeleton |
| * @param bestMatchDistanceInfo the difference between input skeleton |
| * and best match skeleton. |
| * 0, if there is exact match for input skeleton |
| * 1, if there is only field width difference between |
| * the best match and the input skeleton |
| * 2, the only field difference is 'v' and 'z' |
| * -1, if there is calendar field difference between |
| * the best match and the input skeleton |
| * @return best match skeleton |
| */ |
| const UnicodeString* getBestSkeleton(const UnicodeString& skeleton, |
| int8_t& bestMatchDistanceInfo) const; |
| |
| |
| /** |
| * Parse skeleton, save each field's width. |
| * It is used for looking for best match skeleton, |
| * and adjust pattern field width. |
| * @param skeleton skeleton to be parsed |
| * @param skeletonFieldWidth parsed skeleton field width |
| */ |
| static void U_EXPORT2 parseSkeleton(const UnicodeString& skeleton, |
| int32_t* skeletonFieldWidth); |
| |
| |
| /** |
| * Check whether one field width is numeric while the other is string. |
| * |
| * TODO (xji): make it general |
| * |
| * @param fieldWidth one field width |
| * @param anotherFieldWidth another field width |
| * @param patternLetter pattern letter char |
| * @return true if one field width is numeric and the other is string, |
| * false otherwise. |
| */ |
| static UBool U_EXPORT2 stringNumeric(int32_t fieldWidth, |
| int32_t anotherFieldWidth, |
| char patternLetter); |
| |
| |
| /** |
| * Convert calendar field to the interval pattern index in |
| * hash table. |
| * |
| * Since we only support the following calendar fields: |
| * ERA, YEAR, MONTH, DATE, DAY_OF_MONTH, DAY_OF_WEEK, |
| * AM_PM, HOUR, HOUR_OF_DAY, and MINUTE, |
| * We reserve only 4 interval patterns for a skeleton. |
| * |
| * @param field calendar field |
| * @param status output param set to success/failure code on exit |
| * @return interval pattern index in hash table |
| */ |
| static IntervalPatternIndex U_EXPORT2 calendarFieldToIntervalIndex( |
| UCalendarDateFields field, |
| UErrorCode& status); |
| |
| |
| /** |
| * delete hash table (of type fIntervalPatterns). |
| * |
| * @param hTable hash table to be deleted |
| */ |
| void deleteHash(Hashtable* hTable); |
| |
| |
| /** |
| * initialize hash table (of type fIntervalPatterns). |
| * |
| * @param status output param set to success/failure code on exit |
| * @return hash table initialized |
| */ |
| Hashtable* initHash(UErrorCode& status); |
| |
| |
| |
| /** |
| * copy hash table (of type fIntervalPatterns). |
| * |
| * @param source the source to copy from |
| * @param target the target to copy to |
| * @param status output param set to success/failure code on exit |
| */ |
| void copyHash(const Hashtable* source, Hashtable* target, UErrorCode& status); |
| |
| |
| // data members |
| // fallback interval pattern |
| UnicodeString fFallbackIntervalPattern; |
| // default order |
| UBool fFirstDateInPtnIsLaterDate; |
| |
| // HashMap<UnicodeString, UnicodeString[kIPI_MAX_INDEX]> |
| // HashMap( skeleton, pattern[largest_different_field] ) |
| Hashtable* fIntervalPatterns; |
| |
| };// end class DateIntervalInfo |
| |
| |
| inline UBool |
| DateIntervalInfo::operator!=(const DateIntervalInfo& other) const { |
| return !operator==(other); |
| } |
| |
| |
| U_NAMESPACE_END |
| |
| #endif |
| |
| #endif |
| |
