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