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| -rw-r--r-- | intl/icu/source/i18n/unicode/measfmt.h | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/unicode/measfmt.h b/intl/icu/source/i18n/unicode/measfmt.h new file mode 100644 index 0000000000..59bf546a90 --- /dev/null +++ b/intl/icu/source/i18n/unicode/measfmt.h @@ -0,0 +1,398 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +********************************************************************** +* Copyright (c) 2004-2016, International Business Machines +* Corporation and others. All Rights Reserved. +********************************************************************** +* Author: Alan Liu +* Created: April 20, 2004 +* Since: ICU 3.0 +********************************************************************** +*/ +#ifndef MEASUREFORMAT_H +#define MEASUREFORMAT_H + +#include "unicode/utypes.h" + +#if U_SHOW_CPLUSPLUS_API + +#if !UCONFIG_NO_FORMATTING + +#include "unicode/format.h" +#include "unicode/udat.h" + +/** + * \file + * \brief C++ API: Compatibility APIs for measure formatting. + */ + +/** + * Constants for various widths. + * There are 4 widths: Wide, Short, Narrow, Numeric. + * For example, for English, when formatting "3 hours" + * Wide is "3 hours"; short is "3 hrs"; narrow is "3h"; + * formatting "3 hours 17 minutes" as numeric give "3:17" + * @stable ICU 53 + */ +enum UMeasureFormatWidth { + + // Wide, short, and narrow must be first and in this order. + /** + * Spell out measure units. + * @stable ICU 53 + */ + UMEASFMT_WIDTH_WIDE, + + /** + * Abbreviate measure units. + * @stable ICU 53 + */ + UMEASFMT_WIDTH_SHORT, + + /** + * Use symbols for measure units when possible. + * @stable ICU 53 + */ + UMEASFMT_WIDTH_NARROW, + + /** + * Completely omit measure units when possible. For example, format + * '5 hours, 37 minutes' as '5:37' + * @stable ICU 53 + */ + UMEASFMT_WIDTH_NUMERIC, + +#ifndef U_HIDE_DEPRECATED_API + /** + * One more than the highest normal UMeasureFormatWidth value. + * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420. + */ + UMEASFMT_WIDTH_COUNT = 4 +#endif // U_HIDE_DEPRECATED_API +}; +/** @stable ICU 53 */ +typedef enum UMeasureFormatWidth UMeasureFormatWidth; + +U_NAMESPACE_BEGIN + +class Measure; +class MeasureUnit; +class NumberFormat; +class PluralRules; +class MeasureFormatCacheData; +class SharedNumberFormat; +class SharedPluralRules; +class QuantityFormatter; +class SimpleFormatter; +class ListFormatter; +class DateFormat; + +/** + * <p><strong>IMPORTANT:</strong> New users are strongly encouraged to see if + * numberformatter.h fits their use case. Although not deprecated, this header + * is provided for backwards compatibility only, and has much more limited + * capabilities. + * + * @see Format + * @author Alan Liu + * @stable ICU 3.0 + */ +class U_I18N_API MeasureFormat : public Format { + public: + using Format::parseObject; + using Format::format; + + /** + * Constructor. + * <p> + * <strong>NOTE:</strong> New users are strongly encouraged to use + * {@link icu::number::NumberFormatter} instead of NumberFormat. + * @stable ICU 53 + */ + MeasureFormat( + const Locale &locale, UMeasureFormatWidth width, UErrorCode &status); + + /** + * Constructor. + * <p> + * <strong>NOTE:</strong> New users are strongly encouraged to use + * {@link icu::number::NumberFormatter} instead of NumberFormat. + * @stable ICU 53 + */ + MeasureFormat( + const Locale &locale, + UMeasureFormatWidth width, + NumberFormat *nfToAdopt, + UErrorCode &status); + + /** + * Copy constructor. + * @stable ICU 3.0 + */ + MeasureFormat(const MeasureFormat &other); + + /** + * Assignment operator. + * @stable ICU 3.0 + */ + MeasureFormat &operator=(const MeasureFormat &rhs); + + /** + * Destructor. + * @stable ICU 3.0 + */ + virtual ~MeasureFormat(); + + /** + * Return true if given Format objects are semantically equal. + * @stable ICU 53 + */ + virtual bool operator==(const Format &other) const override; + + /** + * Clones this object polymorphically. + * @stable ICU 53 + */ + virtual MeasureFormat *clone() const override; + + /** + * Formats object to produce a string. + * @stable ICU 53 + */ + virtual UnicodeString &format( + const Formattable &obj, + UnicodeString &appendTo, + FieldPosition &pos, + UErrorCode &status) const override; + +#ifndef U_FORCE_HIDE_DRAFT_API + /** + * Parse a string to produce an object. This implementation sets + * status to U_UNSUPPORTED_ERROR. + * + * @draft ICU 53 + */ + virtual void parseObject( + const UnicodeString &source, + Formattable &reslt, + ParsePosition &pos) const override; +#endif // U_FORCE_HIDE_DRAFT_API + + /** + * Formats measure objects to produce a string. An example of such a + * formatted string is 3 meters, 3.5 centimeters. Measure objects appear + * in the formatted string in the same order they appear in the "measures" + * array. The NumberFormat of this object is used only to format the amount + * of the very last measure. The other amounts are formatted with zero + * decimal places while rounding toward zero. + * @param measures array of measure objects. + * @param measureCount the number of measure objects. + * @param appendTo formatted string appended here. + * @param pos the field position. + * @param status the error. + * @return appendTo reference + * + * @stable ICU 53 + */ + UnicodeString &formatMeasures( + const Measure *measures, + int32_t measureCount, + UnicodeString &appendTo, + FieldPosition &pos, + UErrorCode &status) const; + + /** + * Formats a single measure per unit. An example of such a + * formatted string is 3.5 meters per second. + * @param measure The measure object. In above example, 3.5 meters. + * @param perUnit The per unit. In above example, it is + * `*%MeasureUnit::createSecond(status)`. + * @param appendTo formatted string appended here. + * @param pos the field position. + * @param status the error. + * @return appendTo reference + * + * @stable ICU 55 + */ + UnicodeString &formatMeasurePerUnit( + const Measure &measure, + const MeasureUnit &perUnit, + UnicodeString &appendTo, + FieldPosition &pos, + UErrorCode &status) const; + + /** + * Gets the display name of the specified {@link MeasureUnit} corresponding to the current + * locale and format width. + * @param unit The unit for which to get a display name. + * @param status the error. + * @return The display name in the locale and width specified in + * the MeasureFormat constructor, or null if there is no display name available + * for the specified unit. + * + * @stable ICU 58 + */ + UnicodeString getUnitDisplayName(const MeasureUnit& unit, UErrorCode &status) const; + + + /** + * Return a formatter for CurrencyAmount objects in the given + * locale. + * <p> + * <strong>NOTE:</strong> New users are strongly encouraged to use + * {@link icu::number::NumberFormatter} instead of NumberFormat. + * @param locale desired locale + * @param ec input-output error code + * @return a formatter object, or nullptr upon error + * @stable ICU 3.0 + */ + static MeasureFormat* U_EXPORT2 createCurrencyFormat(const Locale& locale, + UErrorCode& ec); + + /** + * Return a formatter for CurrencyAmount objects in the default + * locale. + * <p> + * <strong>NOTE:</strong> New users are strongly encouraged to use + * {@link icu::number::NumberFormatter} instead of NumberFormat. + * @param ec input-output error code + * @return a formatter object, or nullptr upon error + * @stable ICU 3.0 + */ + static MeasureFormat* U_EXPORT2 createCurrencyFormat(UErrorCode& ec); + + /** + * Return the class ID for this class. This is useful only for comparing to + * a return value from getDynamicClassID(). For example: + * <pre> + * . Base* polymorphic_pointer = createPolymorphicObject(); + * . if (polymorphic_pointer->getDynamicClassID() == + * . erived::getStaticClassID()) ... + * </pre> + * @return The class ID for all objects of this class. + * @stable ICU 53 + */ + static UClassID U_EXPORT2 getStaticClassID(void); + + /** + * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This + * method is to implement a simple version of RTTI, since not all C++ + * compilers support genuine RTTI. Polymorphic operator==() and clone() + * methods call this method. + * + * @return The class ID for this object. All objects of a + * given class have the same class ID. Objects of + * other classes have different class IDs. + * @stable ICU 53 + */ + virtual UClassID getDynamicClassID(void) const override; + + protected: + /** + * Default constructor. + * @stable ICU 3.0 + */ + MeasureFormat(); + +#ifndef U_HIDE_INTERNAL_API + + /** + * ICU use only. + * Initialize or change MeasureFormat class from subclass. + * @internal. + */ + void initMeasureFormat( + const Locale &locale, + UMeasureFormatWidth width, + NumberFormat *nfToAdopt, + UErrorCode &status); + /** + * ICU use only. + * Allows subclass to change locale. Note that this method also changes + * the NumberFormat object. Returns true if locale changed; false if no + * change was made. + * @internal. + */ + UBool setMeasureFormatLocale(const Locale &locale, UErrorCode &status); + + /** + * ICU use only. + * Let subclass change NumberFormat. + * @internal. + */ + void adoptNumberFormat(NumberFormat *nfToAdopt, UErrorCode &status); + + /** + * ICU use only. + * @internal. + */ + const NumberFormat &getNumberFormatInternal() const; + + /** + * ICU use only. + * Always returns the short form currency formatter. + * @internal. + */ + const NumberFormat& getCurrencyFormatInternal() const; + + /** + * ICU use only. + * @internal. + */ + const PluralRules &getPluralRules() const; + + /** + * ICU use only. + * @internal. + */ + Locale getLocale(UErrorCode &status) const; + + /** + * ICU use only. + * @internal. + */ + const char *getLocaleID(UErrorCode &status) const; + +#endif /* U_HIDE_INTERNAL_API */ + + private: + const MeasureFormatCacheData *cache; + const SharedNumberFormat *numberFormat; + const SharedPluralRules *pluralRules; + UMeasureFormatWidth fWidth; + + // Declared outside of MeasureFormatSharedData because ListFormatter + // objects are relatively cheap to copy; therefore, they don't need to be + // shared across instances. + ListFormatter *listFormatter; + + UnicodeString &formatMeasure( + const Measure &measure, + const NumberFormat &nf, + UnicodeString &appendTo, + FieldPosition &pos, + UErrorCode &status) const; + + UnicodeString &formatMeasuresSlowTrack( + const Measure *measures, + int32_t measureCount, + UnicodeString& appendTo, + FieldPosition& pos, + UErrorCode& status) const; + + UnicodeString &formatNumeric( + const Formattable *hms, // always length 3: [0] is hour; [1] is + // minute; [2] is second. + int32_t bitMap, // 1=hour set, 2=minute set, 4=second set + UnicodeString &appendTo, + UErrorCode &status) const; +}; + +U_NAMESPACE_END + +#endif // #if !UCONFIG_NO_FORMATTING + +#endif /* U_SHOW_CPLUSPLUS_API */ + +#endif // #ifndef MEASUREFORMAT_H |