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// © 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