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564 lines
23 KiB
564 lines
23 KiB
9 years ago
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/*
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*******************************************************************************
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* Copyright (C) 2007-2016, International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*
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* File DTPTNGEN.H
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*
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*******************************************************************************
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*/
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#ifndef __DTPTNGEN_H__
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#define __DTPTNGEN_H__
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#include "unicode/datefmt.h"
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#include "unicode/locid.h"
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#include "unicode/udat.h"
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#include "unicode/udatpg.h"
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U_NAMESPACE_BEGIN
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/**
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* \file
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* \brief C++ API: Date/Time Pattern Generator
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*/
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class Hashtable;
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class FormatParser;
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class DateTimeMatcher;
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class DistanceInfo;
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class PatternMap;
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class PtnSkeleton;
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class SharedDateTimePatternGenerator;
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/**
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* This class provides flexible generation of date format patterns, like "yy-MM-dd".
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* The user can build up the generator by adding successive patterns. Once that
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* is done, a query can be made using a "skeleton", which is a pattern which just
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* includes the desired fields and lengths. The generator will return the "best fit"
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* pattern corresponding to that skeleton.
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* <p>The main method people will use is getBestPattern(String skeleton),
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* since normally this class is pre-built with data from a particular locale.
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* However, generators can be built directly from other data as well.
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* <p><i>Issue: may be useful to also have a function that returns the list of
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* fields in a pattern, in order, since we have that internally.
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* That would be useful for getting the UI order of field elements.</i>
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* @stable ICU 3.8
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**/
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class U_I18N_API DateTimePatternGenerator : public UObject {
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public:
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/**
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* Construct a flexible generator according to default locale.
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @stable ICU 3.8
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*/
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static DateTimePatternGenerator* U_EXPORT2 createInstance(UErrorCode& status);
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/**
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* Construct a flexible generator according to data for a given locale.
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* @param uLocale
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @stable ICU 3.8
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*/
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static DateTimePatternGenerator* U_EXPORT2 createInstance(const Locale& uLocale, UErrorCode& status);
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#ifndef U_HIDE_INTERNAL_API
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/**
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* For ICU use only
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*
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* @internal
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*/
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static DateTimePatternGenerator* U_EXPORT2 internalMakeInstance(const Locale& uLocale, UErrorCode& status);
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#endif /* U_HIDE_INTERNAL_API */
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/**
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* Create an empty generator, to be constructed with addPattern(...) etc.
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @stable ICU 3.8
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*/
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static DateTimePatternGenerator* U_EXPORT2 createEmptyInstance(UErrorCode& status);
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/**
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* Destructor.
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* @stable ICU 3.8
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*/
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virtual ~DateTimePatternGenerator();
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/**
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* Clone DateTimePatternGenerator object. Clients are responsible for
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* deleting the DateTimePatternGenerator object cloned.
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* @stable ICU 3.8
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*/
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DateTimePatternGenerator* clone() const;
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/**
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* Return true if another object is semantically equal to this one.
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*
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* @param other the DateTimePatternGenerator object to be compared with.
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* @return true if other is semantically equal to this.
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* @stable ICU 3.8
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*/
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UBool operator==(const DateTimePatternGenerator& other) const;
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/**
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* Return true if another object is semantically unequal to this one.
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*
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* @param other the DateTimePatternGenerator object to be compared with.
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* @return true if other is semantically unequal to this.
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* @stable ICU 3.8
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*/
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UBool operator!=(const DateTimePatternGenerator& other) const;
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#ifndef U_HIDE_DRAFT_API
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/**
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* Utility to return a unique skeleton from a given pattern. For example,
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* both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
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*
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* @param pattern Input pattern, such as "dd/MMM"
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return skeleton such as "MMMdd"
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* @draft ICU 56
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*/
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static UnicodeString staticGetSkeleton(const UnicodeString& pattern, UErrorCode& status);
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#endif /* U_HIDE_DRAFT_API */
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/**
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* Utility to return a unique skeleton from a given pattern. For example,
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* both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
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* getSkeleton() works exactly like staticGetSkeleton().
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* Use staticGetSkeleton() instead of getSkeleton().
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*
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* @param pattern Input pattern, such as "dd/MMM"
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return skeleton such as "MMMdd"
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* @stable ICU 3.8
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*/
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UnicodeString getSkeleton(const UnicodeString& pattern, UErrorCode& status); /* {
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The function is commented out because it is a stable API calling a draft API.
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After staticGetSkeleton becomes stable, staticGetSkeleton can be used and
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these comments and the definition of getSkeleton in dtptngen.cpp should be removed.
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return staticGetSkeleton(pattern, status);
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}*/
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#ifndef U_HIDE_DRAFT_API
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/**
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* Utility to return a unique base skeleton from a given pattern. This is
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* the same as the skeleton, except that differences in length are minimized
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* so as to only preserve the difference between string and numeric form. So
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* for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
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* (notice the single d).
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*
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* @param pattern Input pattern, such as "dd/MMM"
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return base skeleton, such as "MMMd"
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* @draft ICU 56
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*/
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static UnicodeString staticGetBaseSkeleton(const UnicodeString& pattern, UErrorCode& status);
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#endif /* U_HIDE_DRAFT_API */
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/**
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* Utility to return a unique base skeleton from a given pattern. This is
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* the same as the skeleton, except that differences in length are minimized
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* so as to only preserve the difference between string and numeric form. So
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* for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
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* (notice the single d).
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* getBaseSkeleton() works exactly like staticGetBaseSkeleton().
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* Use staticGetBaseSkeleton() instead of getBaseSkeleton().
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*
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* @param pattern Input pattern, such as "dd/MMM"
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return base skeleton, such as "MMMd"
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* @stable ICU 3.8
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*/
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UnicodeString getBaseSkeleton(const UnicodeString& pattern, UErrorCode& status); /* {
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The function is commented out because it is a stable API calling a draft API.
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After staticGetBaseSkeleton becomes stable, staticGetBaseSkeleton can be used and
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these comments and the definition of getBaseSkeleton in dtptngen.cpp should be removed.
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return staticGetBaseSkeleton(pattern, status);
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}*/
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/**
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* Adds a pattern to the generator. If the pattern has the same skeleton as
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* an existing pattern, and the override parameter is set, then the previous
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* value is overriden. Otherwise, the previous value is retained. In either
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* case, the conflicting status is set and previous vale is stored in
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* conflicting pattern.
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* <p>
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* Note that single-field patterns (like "MMM") are automatically added, and
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* don't need to be added explicitly!
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*
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* @param pattern Input pattern, such as "dd/MMM"
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* @param override When existing values are to be overridden use true,
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* otherwise use false.
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* @param conflictingPattern Previous pattern with the same skeleton.
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return conflicting status. The value could be UDATPG_NO_CONFLICT,
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* UDATPG_BASE_CONFLICT or UDATPG_CONFLICT.
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* @stable ICU 3.8
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* <p>
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* <h4>Sample code</h4>
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* \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample1
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* \snippet samples/dtptngsample/dtptngsample.cpp addPatternExample
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* <p>
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*/
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UDateTimePatternConflict addPattern(const UnicodeString& pattern,
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UBool override,
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UnicodeString& conflictingPattern,
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UErrorCode& status);
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/**
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* An AppendItem format is a pattern used to append a field if there is no
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* good match. For example, suppose that the input skeleton is "GyyyyMMMd",
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* and there is no matching pattern internally, but there is a pattern
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* matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the
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* G. The way these two are conjoined is by using the AppendItemFormat for G
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* (era). So if that value is, say "{0}, {1}" then the final resulting
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* pattern is "d-MM-yyyy, G".
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* <p>
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* There are actually three available variables: {0} is the pattern so far,
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* {1} is the element we are adding, and {2} is the name of the element.
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* <p>
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* This reflects the way that the CLDR data is organized.
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*
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* @param field such as UDATPG_ERA_FIELD.
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* @param value pattern, such as "{0}, {1}"
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* @stable ICU 3.8
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*/
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void setAppendItemFormat(UDateTimePatternField field, const UnicodeString& value);
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/**
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* Getter corresponding to setAppendItemFormat. Values below 0 or at or
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* above UDATPG_FIELD_COUNT are illegal arguments.
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*
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* @param field such as UDATPG_ERA_FIELD.
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* @return append pattern for field
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* @stable ICU 3.8
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*/
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const UnicodeString& getAppendItemFormat(UDateTimePatternField field) const;
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/**
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* Sets the names of field, eg "era" in English for ERA. These are only
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* used if the corresponding AppendItemFormat is used, and if it contains a
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* {2} variable.
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* <p>
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* This reflects the way that the CLDR data is organized.
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*
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* @param field such as UDATPG_ERA_FIELD.
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* @param value name of the field
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* @stable ICU 3.8
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*/
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void setAppendItemName(UDateTimePatternField field, const UnicodeString& value);
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/**
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* Getter corresponding to setAppendItemNames. Values below 0 or at or above
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* UDATPG_FIELD_COUNT are illegal arguments.
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*
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* @param field such as UDATPG_ERA_FIELD.
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* @return name for field
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* @stable ICU 3.8
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*/
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const UnicodeString& getAppendItemName(UDateTimePatternField field) const;
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/**
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* The DateTimeFormat is a message format pattern used to compose date and
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* time patterns. The default pattern in the root locale is "{1} {0}", where
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* {1} will be replaced by the date pattern and {0} will be replaced by the
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* time pattern; however, other locales may specify patterns such as
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* "{1}, {0}" or "{1} 'at' {0}", etc.
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* <p>
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* This is used when the input skeleton contains both date and time fields,
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* but there is not a close match among the added patterns. For example,
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* suppose that this object was created by adding "dd-MMM" and "hh:mm", and
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* its datetimeFormat is the default "{1} {0}". Then if the input skeleton
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* is "MMMdhmm", there is not an exact match, so the input skeleton is
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* broken up into two components "MMMd" and "hmm". There are close matches
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* for those two skeletons, so the result is put together with this pattern,
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* resulting in "d-MMM h:mm".
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*
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* @param dateTimeFormat
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* message format pattern, here {1} will be replaced by the date
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* pattern and {0} will be replaced by the time pattern.
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* @stable ICU 3.8
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*/
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void setDateTimeFormat(const UnicodeString& dateTimeFormat);
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/**
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* Getter corresponding to setDateTimeFormat.
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* @return DateTimeFormat.
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* @stable ICU 3.8
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*/
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const UnicodeString& getDateTimeFormat() const;
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/**
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* Return the best pattern matching the input skeleton. It is guaranteed to
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* have all of the fields in the skeleton.
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*
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* @param skeleton
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* The skeleton is a pattern containing only the variable fields.
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* For example, "MMMdd" and "mmhh" are skeletons.
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* @param status Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return bestPattern
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* The best pattern found from the given skeleton.
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* @stable ICU 3.8
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* <p>
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* <h4>Sample code</h4>
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* \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample1
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* \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample
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* <p>
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*/
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UnicodeString getBestPattern(const UnicodeString& skeleton, UErrorCode& status);
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/**
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* Return the best pattern matching the input skeleton. It is guaranteed to
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* have all of the fields in the skeleton.
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*
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* @param skeleton
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* The skeleton is a pattern containing only the variable fields.
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* For example, "MMMdd" and "mmhh" are skeletons.
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* @param options
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* Options for forcing the length of specified fields in the
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* returned pattern to match those in the skeleton (when this
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* would not happen otherwise). For default behavior, use
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* UDATPG_MATCH_NO_OPTIONS.
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* @param status
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* Output param set to success/failure code on exit,
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* which must not indicate a failure before the function call.
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* @return bestPattern
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* The best pattern found from the given skeleton.
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* @stable ICU 4.4
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*/
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UnicodeString getBestPattern(const UnicodeString& skeleton,
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UDateTimePatternMatchOptions options,
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UErrorCode& status);
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/**
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* Adjusts the field types (width and subtype) of a pattern to match what is
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* in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
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* skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
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|
|
* "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
|
||
|
|
* <p>
|
||
|
|
* <h4>Sample code</h4>
|
||
|
|
* \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample1
|
||
|
|
* \snippet samples/dtptngsample/dtptngsample.cpp replaceFieldTypesExample
|
||
|
|
* <p>
|
||
|
|
*/
|
||
|
|
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;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ICU "poor man's RTTI", returns a UClassID for the actual class.
|
||
|
|
*
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
virtual UClassID getDynamicClassID() const;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ICU "poor man's RTTI", returns a UClassID for this class.
|
||
|
|
*
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
static UClassID U_EXPORT2 getStaticClassID(void);
|
||
|
|
|
||
|
|
private:
|
||
|
|
/**
|
||
|
|
* Constructor.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
DateTimePatternGenerator(UErrorCode & status);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Constructor.
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
DateTimePatternGenerator(const Locale& locale, UErrorCode & status);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Copy constructor.
|
||
|
|
* @param other DateTimePatternGenerator to copy
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
DateTimePatternGenerator(const DateTimePatternGenerator& other);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Default assignment operator.
|
||
|
|
* @param other DateTimePatternGenerator to copy
|
||
|
|
* @stable ICU 3.8
|
||
|
|
*/
|
||
|
|
DateTimePatternGenerator& operator=(const DateTimePatternGenerator& other);
|
||
|
|
|
||
|
|
Locale pLocale; // pattern locale
|
||
|
|
FormatParser *fp;
|
||
|
|
DateTimeMatcher* dtMatcher;
|
||
|
|
DistanceInfo *distanceInfo;
|
||
|
|
PatternMap *patternMap;
|
||
|
|
UnicodeString appendItemFormats[UDATPG_FIELD_COUNT];
|
||
|
|
UnicodeString appendItemNames[UDATPG_FIELD_COUNT];
|
||
|
|
UnicodeString dateTimeFormat;
|
||
|
|
UnicodeString decimal;
|
||
|
|
DateTimeMatcher *skipMatcher;
|
||
|
|
Hashtable *fAvailableFormatKeyHash;
|
||
|
|
UnicodeString hackPattern;
|
||
|
|
UnicodeString emptyString;
|
||
|
|
UChar fDefaultHourFormatChar;
|
||
|
|
|
||
|
|
int32_t fAllowedHourFormats[7]; // Actually an array of AllowedHourFormat enum type, ending with UNKNOWN.
|
||
|
|
|
||
|
|
/* internal flags masks for adjustFieldTypes etc. */
|
||
|
|
enum {
|
||
|
|
kDTPGNoFlags = 0,
|
||
|
|
kDTPGFixFractionalSeconds = 1,
|
||
|
|
kDTPGSkeletonUsesCapJ = 2,
|
||
|
|
kDTPGSkeletonUsesLowB = 3,
|
||
|
|
kDTPGSkeletonUsesCapB = 4
|
||
|
|
};
|
||
|
|
|
||
|
|
void initData(const Locale &locale, UErrorCode &status);
|
||
|
|
void addCanonicalItems();
|
||
|
|
void addICUPatterns(const Locale& locale, UErrorCode& status);
|
||
|
|
void hackTimes(const UnicodeString& hackPattern, 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;
|
||
|
|
UDateTimePatternField getAppendNameNumber(const char* field) const;
|
||
|
|
void getAppendName(UDateTimePatternField field, UnicodeString& value);
|
||
|
|
int32_t getCanonicalIndex(const UnicodeString& field);
|
||
|
|
const UnicodeString* getBestRaw(DateTimeMatcher& source, int32_t includeMask, DistanceInfo* missingFields, const PtnSkeleton** specifiedSkeletonPtr = 0);
|
||
|
|
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, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
|
||
|
|
int32_t getTopBitNumber(int32_t foundMask);
|
||
|
|
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 loadAllowedHourFormatsData(UErrorCode &status);
|
||
|
|
void getAllowedHourFormats(const Locale &locale, UErrorCode &status);
|
||
|
|
} ;// end class DateTimePatternGenerator
|
||
|
|
|
||
|
|
U_NAMESPACE_END
|
||
|
|
|
||
|
|
#endif
|