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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2007-2016, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*
* File DTPTNGEN.H
*
*******************************************************************************
*/
#ifndef __DTPTNGEN_H__
#define __DTPTNGEN_H__
#include "unicode/utypes.h"
#if U_SHOW_CPLUSPLUS_API
#include "unicode/datefmt.h"
#include "unicode/locid.h"
#include "unicode/udat.h"
#include "unicode/udatpg.h"
#include "unicode/unistr.h"
U_NAMESPACE_BEGIN
/**
* \file
* \brief C++ API: Date/Time Pattern Generator
*/
class CharString;
class Hashtable;
class FormatParser;
class DateTimeMatcher;
class DistanceInfo;
class PatternMap;
class PtnSkeleton;
class SharedDateTimePatternGenerator;
/**
* This class provides flexible generation of date format patterns, like "yy-MM-dd".
* The user can build up the generator by adding successive patterns. Once that
* is done, a query can be made using a "skeleton", which is a pattern which just
* includes the desired fields and lengths. The generator will return the "best fit"
* pattern corresponding to that skeleton.
* <p>The main method people will use is getBestPattern(String skeleton),
* since normally this class is pre-built with data from a particular locale.
* However, generators can be built directly from other data as well.
* <p><i>Issue: may be useful to also have a function that returns the list of
* fields in a pattern, in order, since we have that internally.
* That would be useful for getting the UI order of field elements.</i>
* @stable ICU 3.8
**/
class U_I18N_API DateTimePatternGenerator : public UObject {
public:
/**
* Construct a flexible generator according to default locale.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @stable ICU 3.8
*/
static DateTimePatternGenerator* U_EXPORT2 createInstance(UErrorCode& status);
/**
* Construct a flexible generator according to data for a given locale.
* @param uLocale
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @stable ICU 3.8
*/
static DateTimePatternGenerator* U_EXPORT2 createInstance(const Locale& uLocale, UErrorCode& status);
#ifndef U_HIDE_INTERNAL_API
/**
* For ICU use only. Skips loading the standard date/time patterns (which is done via DateFormat).
*
* @internal
*/
static DateTimePatternGenerator* U_EXPORT2 createInstanceNoStdPat(const Locale& uLocale, UErrorCode& status);
#endif /* U_HIDE_INTERNAL_API */
/**
* Create an empty generator, to be constructed with addPattern(...) etc.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @stable ICU 3.8
*/
static DateTimePatternGenerator* U_EXPORT2 createEmptyInstance(UErrorCode& status);
/**
* Destructor.
* @stable ICU 3.8
*/
virtual ~DateTimePatternGenerator();
/**
* Clone DateTimePatternGenerator object. Clients are responsible for
* deleting the DateTimePatternGenerator object cloned.
* @stable ICU 3.8
*/
DateTimePatternGenerator* clone() const;
/**
* Return true if another object is semantically equal to this one.
*
* @param other the DateTimePatternGenerator object to be compared with.
* @return true if other is semantically equal to this.
* @stable ICU 3.8
*/
bool operator==(const DateTimePatternGenerator& other) const;
/**
* Return true if another object is semantically unequal to this one.
*
* @param other the DateTimePatternGenerator object to be compared with.
* @return true if other is semantically unequal to this.
* @stable ICU 3.8
*/
bool operator!=(const DateTimePatternGenerator& other) const;
/**
* Utility to return a unique skeleton from a given pattern. For example,
* both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
*
* @param pattern Input pattern, such as "dd/MMM"
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return skeleton such as "MMMdd"
* @stable ICU 56
*/
static UnicodeString staticGetSkeleton(const UnicodeString& pattern, UErrorCode& status);
/**
* Utility to return a unique skeleton from a given pattern. For example,
* both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
* getSkeleton() works exactly like staticGetSkeleton().
* Use staticGetSkeleton() instead of getSkeleton().
*
* @param pattern Input pattern, such as "dd/MMM"
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return skeleton such as "MMMdd"
* @stable ICU 3.8
*/
UnicodeString getSkeleton(const UnicodeString& pattern, UErrorCode& status); /* {
The function is commented out because it is a stable API calling a draft API.
After staticGetSkeleton becomes stable, staticGetSkeleton can be used and
these comments and the definition of getSkeleton in dtptngen.cpp should be removed.
return staticGetSkeleton(pattern, status);
}*/
/**
* Utility to return a unique base skeleton from a given pattern. This is
* the same as the skeleton, except that differences in length are minimized
* so as to only preserve the difference between string and numeric form. So
* for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
* (notice the single d).
*
* @param pattern Input pattern, such as "dd/MMM"
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return base skeleton, such as "MMMd"
* @stable ICU 56
*/
static UnicodeString staticGetBaseSkeleton(const UnicodeString& pattern, UErrorCode& status);
/**
* Utility to return a unique base skeleton from a given pattern. This is
* the same as the skeleton, except that differences in length are minimized
* so as to only preserve the difference between string and numeric form. So
* for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
* (notice the single d).
* getBaseSkeleton() works exactly like staticGetBaseSkeleton().
* Use staticGetBaseSkeleton() instead of getBaseSkeleton().
*
* @param pattern Input pattern, such as "dd/MMM"
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return base skeleton, such as "MMMd"
* @stable ICU 3.8
*/
UnicodeString getBaseSkeleton(const UnicodeString& pattern, UErrorCode& status); /* {
The function is commented out because it is a stable API calling a draft API.
After staticGetBaseSkeleton becomes stable, staticGetBaseSkeleton can be used and
these comments and the definition of getBaseSkeleton in dtptngen.cpp should be removed.
return staticGetBaseSkeleton(pattern, status);
}*/
/**
* Adds a pattern to the generator. If the pattern has the same skeleton as
* an existing pattern, and the override parameter is set, then the previous
* value is overridden. Otherwise, the previous value is retained. In either
* case, the conflicting status is set and previous vale is stored in
* conflicting pattern.
* <p>
* Note that single-field patterns (like "MMM") are automatically added, and
* don't need to be added explicitly!
*
* @param pattern Input pattern, such as "dd/MMM"
* @param override When existing values are to be overridden use true,
* otherwise use false.
* @param conflictingPattern Previous pattern with the same skeleton.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return conflicting status. The value could be UDATPG_NO_CONFLICT,
* UDATPG_BASE_CONFLICT or UDATPG_CONFLICT.
* @stable ICU 3.8
*/
UDateTimePatternConflict addPattern(const UnicodeString& pattern,
UBool override,
UnicodeString& conflictingPattern,
UErrorCode& status);
/**
* An AppendItem format is a pattern used to append a field if there is no
* good match. For example, suppose that the input skeleton is "GyyyyMMMd",
* and there is no matching pattern internally, but there is a pattern
* matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the
* G. The way these two are conjoined is by using the AppendItemFormat for G
* (era). So if that value is, say "{0}, {1}" then the final resulting
* pattern is "d-MM-yyyy, G".
* <p>
* There are actually three available variables: {0} is the pattern so far,
* {1} is the element we are adding, and {2} is the name of the element.
* <p>
* This reflects the way that the CLDR data is organized.
*
* @param field such as UDATPG_ERA_FIELD.
* @param value pattern, such as "{0}, {1}"
* @stable ICU 3.8
*/
void setAppendItemFormat(UDateTimePatternField field, const UnicodeString& value);
/**
* Getter corresponding to setAppendItemFormat. Values below 0 or at or
* above UDATPG_FIELD_COUNT are illegal arguments.
*
* @param field such as UDATPG_ERA_FIELD.
* @return append pattern for field
* @stable ICU 3.8
*/
const UnicodeString& getAppendItemFormat(UDateTimePatternField field) const;
/**
* Sets the names of field, eg "era" in English for ERA. These are only
* used if the corresponding AppendItemFormat is used, and if it contains a
* {2} variable.
* <p>
* This reflects the way that the CLDR data is organized.
*
* @param field such as UDATPG_ERA_FIELD.
* @param value name of the field
* @stable ICU 3.8
*/
void setAppendItemName(UDateTimePatternField field, const UnicodeString& value);
/**
* Getter corresponding to setAppendItemNames. Values below 0 or at or above
* UDATPG_FIELD_COUNT are illegal arguments. Note: The more general method
* for getting date/time field display names is getFieldDisplayName.
*
* @param field such as UDATPG_ERA_FIELD.
* @return name for field
* @see getFieldDisplayName
* @stable ICU 3.8
*/
const UnicodeString& getAppendItemName(UDateTimePatternField field) const;
/**
* The general interface to get a display name for a particular date/time field,
* in one of several possible display widths.
*
* @param field The desired UDateTimePatternField, such as UDATPG_ERA_FIELD.
* @param width The desired UDateTimePGDisplayWidth, such as UDATPG_ABBREVIATED.
* @return The display name for field
* @stable ICU 61
*/
UnicodeString getFieldDisplayName(UDateTimePatternField field, UDateTimePGDisplayWidth width) const;
/**
* The DateTimeFormat is a message format pattern used to compose date and
* time patterns. The default pattern in the root locale is "{1} {0}", where
* {1} will be replaced by the date pattern and {0} will be replaced by the
* time pattern; however, other locales may specify patterns such as
* "{1}, {0}" or "{1} 'at' {0}", etc.
* <p>
* This is used when the input skeleton contains both date and time fields,
* but there is not a close match among the added patterns. For example,
* suppose that this object was created by adding "dd-MMM" and "hh:mm", and
* its datetimeFormat is the default "{1} {0}". Then if the input skeleton
* is "MMMdhmm", there is not an exact match, so the input skeleton is
* broken up into two components "MMMd" and "hmm". There are close matches
* for those two skeletons, so the result is put together with this pattern,
* resulting in "d-MMM h:mm".
*
* There are four DateTimeFormats in a DateTimePatternGenerator object,
* corresponding to date styles UDAT_FULL..UDAT_SHORT. This method sets
* all of them to the specified pattern. To set them individually, see
* setDateTimeFormat(UDateFormatStyle style, ...).
*
* @param dateTimeFormat
* message format pattern, here {1} will be replaced by the date
* pattern and {0} will be replaced by the time pattern.
* @stable ICU 3.8
*/
void setDateTimeFormat(const UnicodeString& dateTimeFormat);
/**
* Getter corresponding to setDateTimeFormat.
*
* There are four DateTimeFormats in a DateTimePatternGenerator object,
* corresponding to date styles UDAT_FULL..UDAT_SHORT. This method gets
* the style for UDAT_MEDIUM (the default). To get them individually, see
* getDateTimeFormat(UDateFormatStyle style).
*
* @return DateTimeFormat.
* @stable ICU 3.8
*/
const UnicodeString& getDateTimeFormat() const;
#if !UCONFIG_NO_FORMATTING
/**
* dateTimeFormats are message patterns used to compose combinations of date
* and time patterns. There are four length styles, corresponding to the
* inferred style of the date pattern; these are UDateFormatStyle values:
* - UDAT_FULL (for date pattern with weekday and long month), else
* - UDAT_LONG (for a date pattern with long month), else
* - UDAT_MEDIUM (for a date pattern with abbreviated month), else
* - UDAT_SHORT (for any other date pattern).
* For details on dateTimeFormats, see
* https://www.unicode.org/reports/tr35/tr35-dates.html#dateTimeFormats.
* The default pattern in the root locale for all styles is "{1} {0}".
*
* @param style
* one of DateFormat.FULL..DateFormat.SHORT. Error if out of range.
* @param dateTimeFormat
* the new dateTimeFormat to set for the the specified style
* @param status
* in/out parameter; if no failure status is already set,
* it will be set according to result of the function (e.g.
* U_ILLEGAL_ARGUMENT_ERROR for style out of range).
* @stable ICU 71
*/
void setDateTimeFormat(UDateFormatStyle style, const UnicodeString& dateTimeFormat,
UErrorCode& status);
/**
* Getter corresponding to setDateTimeFormat.
*
* @param style
* one of UDAT_FULL..UDAT_SHORT. Error if out of range.
* @param status
* in/out parameter; if no failure status is already set,
* it will be set according to result of the function (e.g.
* U_ILLEGAL_ARGUMENT_ERROR for style out of range).
* @return
* the current dateTimeFormat for the the specified style, or
* empty string in case of error. The UnicodeString reference,
* or the contents of the string, may no longer be valid if
* setDateTimeFormat is called, or the DateTimePatternGenerator
* object is deleted.
* @stable ICU 71
*/
const UnicodeString& getDateTimeFormat(UDateFormatStyle style,
UErrorCode& status) const;
#endif /* #if !UCONFIG_NO_FORMATTING */
/**
* Return the best pattern matching the input skeleton. It is guaranteed to
* have all of the fields in the skeleton.
*
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return bestPattern
* The best pattern found from the given skeleton.
* @stable ICU 3.8
*/
UnicodeString getBestPattern(const UnicodeString& skeleton, UErrorCode& status);
/**
* Return the best pattern matching the input skeleton. It is guaranteed to
* have all of the fields in the skeleton.
*
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param options
* Options for forcing the length of specified fields in the
* returned pattern to match those in the skeleton (when this
* would not happen otherwise). For default behavior, use
* UDATPG_MATCH_NO_OPTIONS.
* @param status
* Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return bestPattern
* The best pattern found from the given skeleton.
* @stable ICU 4.4
*/
UnicodeString getBestPattern(const UnicodeString& skeleton,
UDateTimePatternMatchOptions options,
UErrorCode& status);
/**
* Adjusts the field types (width and subtype) of a pattern to match what is
* in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
* skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
* "dd-MMMM hh:mm". This is used internally to get the best match for the
* input skeleton, but can also be used externally.
*
* @param pattern Input pattern
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return pattern adjusted to match the skeleton fields widths and subtypes.
* @stable ICU 3.8
*/
UnicodeString replaceFieldTypes(const UnicodeString& pattern,
const UnicodeString& skeleton,
UErrorCode& status);
/**
* Adjusts the field types (width and subtype) of a pattern to match what is
* in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
* skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
* "dd-MMMM hh:mm". This is used internally to get the best match for the
* input skeleton, but can also be used externally.
*
* @param pattern Input pattern
* @param skeleton
* The skeleton is a pattern containing only the variable fields.
* For example, "MMMdd" and "mmhh" are skeletons.
* @param options
* Options controlling whether the length of specified fields in the
* pattern are adjusted to match those in the skeleton (when this
* would not happen otherwise). For default behavior, use
* UDATPG_MATCH_NO_OPTIONS.
* @param status
* Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return pattern adjusted to match the skeleton fields widths and subtypes.
* @stable ICU 4.4
*/
UnicodeString replaceFieldTypes(const UnicodeString& pattern,
const UnicodeString& skeleton,
UDateTimePatternMatchOptions options,
UErrorCode& status);
/**
* Return a list of all the skeletons (in canonical form) from this class.
*
* Call getPatternForSkeleton() to get the corresponding pattern.
*
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return StringEnumeration with the skeletons.
* The caller must delete the object.
* @stable ICU 3.8
*/
StringEnumeration* getSkeletons(UErrorCode& status) const;
/**
* Get the pattern corresponding to a given skeleton.
* @param skeleton
* @return pattern corresponding to a given skeleton.
* @stable ICU 3.8
*/
const UnicodeString& getPatternForSkeleton(const UnicodeString& skeleton) const;
/**
* Return a list of all the base skeletons (in canonical form) from this class.
*
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return a StringEnumeration with the base skeletons.
* The caller must delete the object.
* @stable ICU 3.8
*/
StringEnumeration* getBaseSkeletons(UErrorCode& status) const;
#ifndef U_HIDE_INTERNAL_API
/**
* Return a list of redundant patterns are those which if removed, make no
* difference in the resulting getBestPattern values. This method returns a
* list of them, to help check the consistency of the patterns used to build
* this generator.
*
* @param status Output param set to success/failure code on exit,
* which must not indicate a failure before the function call.
* @return a StringEnumeration with the redundant pattern.
* The caller must delete the object.
* @internal ICU 3.8
*/
StringEnumeration* getRedundants(UErrorCode& status);
#endif /* U_HIDE_INTERNAL_API */
/**
* The decimal value is used in formatting fractions of seconds. If the
* skeleton contains fractional seconds, then this is used with the
* fractional seconds. For example, suppose that the input pattern is
* "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and
* the decimal string is ",". Then the resulting pattern is modified to be
* "H:mm:ss,SSSS"
*
* @param decimal
* @stable ICU 3.8
*/
void setDecimal(const UnicodeString& decimal);
/**
* Getter corresponding to setDecimal.
* @return UnicodeString corresponding to the decimal point
* @stable ICU 3.8
*/
const UnicodeString& getDecimal() const;
#if !UCONFIG_NO_FORMATTING
/**
* Get the default hour cycle for a locale. Uses the locale that the
* DateTimePatternGenerator was initially created with.
*
* Cannot be used on an empty DateTimePatternGenerator instance.
*
* @param status Output param set to success/failure code on exit, which
* which must not indicate a failure before the function call.
* Set to U_UNSUPPORTED_ERROR if used on an empty instance.
* @return the default hour cycle.
* @stable ICU 67
*/
UDateFormatHourCycle getDefaultHourCycle(UErrorCode& status) const;
#endif /* #if !UCONFIG_NO_FORMATTING */
/**
* ICU "poor man's RTTI", returns a UClassID for the actual class.
*
* @stable ICU 3.8
*/
virtual UClassID getDynamicClassID() const override;
/**
* ICU "poor man's RTTI", returns a UClassID for this class.
*
* @stable ICU 3.8
*/
static UClassID U_EXPORT2 getStaticClassID();
private:
/**
* Constructor.
*/
DateTimePatternGenerator(UErrorCode & status);
/**
* Constructor.
*/
DateTimePatternGenerator(const Locale& locale, UErrorCode & status, UBool skipStdPatterns = false);
/**
* Copy constructor.
* @param other DateTimePatternGenerator to copy
*/
DateTimePatternGenerator(const DateTimePatternGenerator& other);
/**
* Default assignment operator.
* @param other DateTimePatternGenerator to copy
*/
DateTimePatternGenerator& operator=(const DateTimePatternGenerator& other);
static const int32_t UDATPG_WIDTH_COUNT = UDATPG_NARROW + 1;
Locale pLocale; // pattern locale
FormatParser *fp;
DateTimeMatcher* dtMatcher;
DistanceInfo *distanceInfo;
PatternMap *patternMap;
UnicodeString appendItemFormats[UDATPG_FIELD_COUNT];
UnicodeString fieldDisplayNames[UDATPG_FIELD_COUNT][UDATPG_WIDTH_COUNT];
UnicodeString dateTimeFormat[4];
UnicodeString decimal;
DateTimeMatcher *skipMatcher;
Hashtable *fAvailableFormatKeyHash;
UnicodeString emptyString;
char16_t fDefaultHourFormatChar;
int32_t fAllowedHourFormats[7]; // Actually an array of AllowedHourFormat enum type, ending with UNKNOWN.
// Internal error code used for recording/reporting errors that occur during methods that do not
// have a UErrorCode parameter. For example: the Copy Constructor, or the ::clone() method.
// When this is set to an error the object is in an invalid state.
UErrorCode internalErrorCode;
/* internal flags masks for adjustFieldTypes etc. */
enum {
kDTPGNoFlags = 0,
kDTPGFixFractionalSeconds = 1,
kDTPGSkeletonUsesCapJ = 2
// with #13183, no longer need flags for b, B
};
void initData(const Locale &locale, UErrorCode &status, UBool skipStdPatterns = false);
void addCanonicalItems(UErrorCode &status);
void addICUPatterns(const Locale& locale, UErrorCode& status);
void hackTimes(const UnicodeString& hackPattern, UErrorCode& status);
void getCalendarTypeToUse(const Locale& locale, CharString& destination, UErrorCode& err);
void consumeShortTimePattern(const UnicodeString& shortTimePattern, UErrorCode& status);
void addCLDRData(const Locale& locale, UErrorCode& status);
UDateTimePatternConflict addPatternWithSkeleton(const UnicodeString& pattern, const UnicodeString * skeletonToUse, UBool override, UnicodeString& conflictingPattern, UErrorCode& status);
void initHashtable(UErrorCode& status);
void setDateTimeFromCalendar(const Locale& locale, UErrorCode& status);
void setDecimalSymbols(const Locale& locale, UErrorCode& status);
UDateTimePatternField getAppendFormatNumber(const char* field) const;
// Note for the next 3: UDateTimePGDisplayWidth is now stable ICU 61
UDateTimePatternField getFieldAndWidthIndices(const char* key, UDateTimePGDisplayWidth* widthP) const;
void setFieldDisplayName(UDateTimePatternField field, UDateTimePGDisplayWidth width, const UnicodeString& value);
UnicodeString& getMutableFieldDisplayName(UDateTimePatternField field, UDateTimePGDisplayWidth width);
void getAppendName(UDateTimePatternField field, UnicodeString& value);
UnicodeString mapSkeletonMetacharacters(const UnicodeString& patternForm, int32_t* flags, UErrorCode& status);
const UnicodeString* getBestRaw(DateTimeMatcher& source, int32_t includeMask, DistanceInfo* missingFields, UErrorCode& status, const PtnSkeleton** specifiedSkeletonPtr = nullptr);
UnicodeString adjustFieldTypes(const UnicodeString& pattern, const PtnSkeleton* specifiedSkeleton, int32_t flags, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
UnicodeString getBestAppending(int32_t missingFields, int32_t flags, UErrorCode& status, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
int32_t getTopBitNumber(int32_t foundMask) const;
void setAvailableFormat(const UnicodeString &key, UErrorCode& status);
UBool isAvailableFormatSet(const UnicodeString &key) const;
void copyHashtable(Hashtable *other, UErrorCode &status);
UBool isCanonicalItem(const UnicodeString& item) const;
static void U_CALLCONV loadAllowedHourFormatsData(UErrorCode &status);
void getAllowedHourFormats(const Locale &locale, UErrorCode &status);
struct U_HIDDEN AppendItemFormatsSink;
struct U_HIDDEN AppendItemNamesSink;
struct U_HIDDEN AvailableFormatsSink;
} ;// end class DateTimePatternGenerator
U_NAMESPACE_END
#endif /* U_SHOW_CPLUSPLUS_API */
#endif
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