numberrangeformatter.h

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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
 
#ifndef __NUMBERRANGEFORMATTER_H__
#define __NUMBERRANGEFORMATTER_H__
 
#include "unicode/utypes.h"
 
#if U_SHOW_CPLUSPLUS_API
 
#if !UCONFIG_NO_FORMATTING
 
#include <atomic>
#include "unicode/appendable.h"
#include "unicode/fieldpos.h"
#include "unicode/formattedvalue.h"
#include "unicode/fpositer.h"
#include "unicode/numberformatter.h"

 

typedef enum UNumberRangeCollapse {
    UNUM_RANGE_COLLAPSE_AUTO,

    UNUM_RANGE_COLLAPSE_NONE,

    UNUM_RANGE_COLLAPSE_UNIT,

    UNUM_RANGE_COLLAPSE_ALL
} UNumberRangeCollapse;

typedef enum UNumberRangeIdentityFallback {
    UNUM_IDENTITY_FALLBACK_SINGLE_VALUE,

    UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE,

    UNUM_IDENTITY_FALLBACK_APPROXIMATELY,

    UNUM_IDENTITY_FALLBACK_RANGE
} UNumberRangeIdentityFallback;

typedef enum UNumberRangeIdentityResult {
    UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING,

    UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING,

    UNUM_IDENTITY_RESULT_NOT_EQUAL,
 
#ifndef U_HIDE_INTERNAL_API
    UNUM_IDENTITY_RESULT_COUNT
#endif
 
} UNumberRangeIdentityResult;
 
U_NAMESPACE_BEGIN
 
namespace number {  // icu::number
 
// Forward declarations:
class UnlocalizedNumberRangeFormatter;
class LocalizedNumberRangeFormatter;
class FormattedNumberRange;
 
namespace impl {
 
// Forward declarations:
struct RangeMacroProps;
class DecimalQuantity;
class UFormattedNumberRangeData;
class NumberRangeFormatterImpl;
 
} // namespace impl

#if U_PLATFORM == U_PF_WINDOWS && !defined(U_IN_DOXYGEN)
} // namespace icu::number
U_NAMESPACE_END
 
template struct U_I18N_API std::atomic< U_NAMESPACE_QUALIFIER number::impl::NumberRangeFormatterImpl*>;
 
U_NAMESPACE_BEGIN
namespace number {  // icu::number
#endif
 
// Other helper classes would go here, but there are none.
 
namespace impl {  // icu::number::impl
 
// Do not enclose entire MacroProps with #ifndef U_HIDE_INTERNAL_API, needed for a protected field
struct U_I18N_API RangeMacroProps : public UMemory {
    UnlocalizedNumberFormatter formatter1; // = NumberFormatter::with();

    UnlocalizedNumberFormatter formatter2; // = NumberFormatter::with();

    bool singleFormatter = true;

    UNumberRangeCollapse collapse = UNUM_RANGE_COLLAPSE_AUTO;

    UNumberRangeIdentityFallback identityFallback = UNUM_IDENTITY_FALLBACK_APPROXIMATELY;

    Locale locale;
 
    // NOTE: Uses default copy and move constructors.

    bool copyErrorTo(UErrorCode &status) const {
        return formatter1.copyErrorTo(status) || formatter2.copyErrorTo(status);
    }
};
 
} // namespace impl

template<typename Derived>
class U_I18N_API NumberRangeFormatterSettings {
  public:
    Derived numberFormatterBoth(const UnlocalizedNumberFormatter &formatter) const &;

    Derived numberFormatterBoth(const UnlocalizedNumberFormatter &formatter) &&;

    Derived numberFormatterBoth(UnlocalizedNumberFormatter &&formatter) const &;

    Derived numberFormatterBoth(UnlocalizedNumberFormatter &&formatter) &&;

    Derived numberFormatterFirst(const UnlocalizedNumberFormatter &formatterFirst) const &;

    Derived numberFormatterFirst(const UnlocalizedNumberFormatter &formatterFirst) &&;

    Derived numberFormatterFirst(UnlocalizedNumberFormatter &&formatterFirst) const &;

    Derived numberFormatterFirst(UnlocalizedNumberFormatter &&formatterFirst) &&;

    Derived numberFormatterSecond(const UnlocalizedNumberFormatter &formatterSecond) const &;

    Derived numberFormatterSecond(const UnlocalizedNumberFormatter &formatterSecond) &&;

    Derived numberFormatterSecond(UnlocalizedNumberFormatter &&formatterSecond) const &;

    Derived numberFormatterSecond(UnlocalizedNumberFormatter &&formatterSecond) &&;

    Derived collapse(UNumberRangeCollapse collapse) const &;

    Derived collapse(UNumberRangeCollapse collapse) &&;

    Derived identityFallback(UNumberRangeIdentityFallback identityFallback) const &;

    Derived identityFallback(UNumberRangeIdentityFallback identityFallback) &&;

    LocalPointer<Derived> clone() const &;

    LocalPointer<Derived> clone() &&;

    UBool copyErrorTo(UErrorCode &outErrorCode) const {
        if (U_FAILURE(outErrorCode)) {
            // Do not overwrite the older error code
            return TRUE;
        }
        fMacros.copyErrorTo(outErrorCode);
        return U_FAILURE(outErrorCode);
    }
 
    // NOTE: Uses default copy and move constructors.
 
  private:
    impl::RangeMacroProps fMacros;
 
    // Don't construct me directly!  Use (Un)LocalizedNumberFormatter.
    NumberRangeFormatterSettings() = default;
 
    friend class LocalizedNumberRangeFormatter;
    friend class UnlocalizedNumberRangeFormatter;
};

class U_I18N_API UnlocalizedNumberRangeFormatter
        : public NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>, public UMemory {
 
  public:
    LocalizedNumberRangeFormatter locale(const icu::Locale &locale) const &;

    LocalizedNumberRangeFormatter locale(const icu::Locale &locale) &&;

    UnlocalizedNumberRangeFormatter() = default;

    UnlocalizedNumberRangeFormatter(const UnlocalizedNumberRangeFormatter &other);

    UnlocalizedNumberRangeFormatter(UnlocalizedNumberRangeFormatter&& src) U_NOEXCEPT;

    UnlocalizedNumberRangeFormatter& operator=(const UnlocalizedNumberRangeFormatter& other);

    UnlocalizedNumberRangeFormatter& operator=(UnlocalizedNumberRangeFormatter&& src) U_NOEXCEPT;
 
  private:
    explicit UnlocalizedNumberRangeFormatter(
            const NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>& other);
 
    explicit UnlocalizedNumberRangeFormatter(
            NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>&& src) U_NOEXCEPT;
 
    // To give the fluent setters access to this class's constructor:
    friend class NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>;
 
    // To give NumberRangeFormatter::with() access to this class's constructor:
    friend class NumberRangeFormatter;
};

class U_I18N_API LocalizedNumberRangeFormatter
        : public NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>, public UMemory {
  public:
    FormattedNumberRange formatFormattableRange(
        const Formattable& first, const Formattable& second, UErrorCode& status) const;

    LocalizedNumberRangeFormatter() = default;

    LocalizedNumberRangeFormatter(const LocalizedNumberRangeFormatter &other);

    LocalizedNumberRangeFormatter(LocalizedNumberRangeFormatter&& src) U_NOEXCEPT;

    LocalizedNumberRangeFormatter& operator=(const LocalizedNumberRangeFormatter& other);

    LocalizedNumberRangeFormatter& operator=(LocalizedNumberRangeFormatter&& src) U_NOEXCEPT;
 
#ifndef U_HIDE_INTERNAL_API

    void formatImpl(impl::UFormattedNumberRangeData& results, bool equalBeforeRounding,
                    UErrorCode& status) const;
 
#endif  /* U_HIDE_INTERNAL_API */

    ~LocalizedNumberRangeFormatter();
 
  private:
    std::atomic<impl::NumberRangeFormatterImpl*> fAtomicFormatter = {};
 
    const impl::NumberRangeFormatterImpl* getFormatter(UErrorCode& stauts) const;
 
    explicit LocalizedNumberRangeFormatter(
        const NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>& other);
 
    explicit LocalizedNumberRangeFormatter(
        NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>&& src) U_NOEXCEPT;
 
    LocalizedNumberRangeFormatter(const impl::RangeMacroProps &macros, const Locale &locale);
 
    LocalizedNumberRangeFormatter(impl::RangeMacroProps &&macros, const Locale &locale);
 
    void clear();
 
    // To give the fluent setters access to this class's constructor:
    friend class NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>;
    friend class NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>;
 
    // To give UnlocalizedNumberRangeFormatter::locale() access to this class's constructor:
    friend class UnlocalizedNumberRangeFormatter;
};

class U_I18N_API FormattedNumberRange : public UMemory, public FormattedValue {
  public:
    // Copybrief: this method is older than the parent method
    UnicodeString toString(UErrorCode& status) const U_OVERRIDE;
 
    // Copydoc: this method is new in ICU 64
    UnicodeString toTempString(UErrorCode& status) const U_OVERRIDE;
 
    // Copybrief: this method is older than the parent method
    Appendable &appendTo(Appendable &appendable, UErrorCode& status) const U_OVERRIDE;
 
    // Copydoc: this method is new in ICU 64
    UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const U_OVERRIDE;
 
#ifndef U_HIDE_DRAFT_API
    UnicodeString getFirstDecimal(UErrorCode& status) const;

    UnicodeString getSecondDecimal(UErrorCode& status) const;
#endif // U_HIDE_DRAFT_API

    UNumberRangeIdentityResult getIdentityResult(UErrorCode& status) const;

    FormattedNumberRange(const FormattedNumberRange&) = delete;

    FormattedNumberRange& operator=(const FormattedNumberRange&) = delete;

    FormattedNumberRange(FormattedNumberRange&& src) U_NOEXCEPT;

    FormattedNumberRange& operator=(FormattedNumberRange&& src) U_NOEXCEPT;

    ~FormattedNumberRange();
 
  private:
    // Can't use LocalPointer because UFormattedNumberRangeData is forward-declared
    const impl::UFormattedNumberRangeData *fData;
 
    // Error code for the terminal methods
    UErrorCode fErrorCode;

    explicit FormattedNumberRange(impl::UFormattedNumberRangeData *results)
        : fData(results), fErrorCode(U_ZERO_ERROR) {}
 
    explicit FormattedNumberRange(UErrorCode errorCode)
        : fData(nullptr), fErrorCode(errorCode) {}
 
    void getAllFieldPositionsImpl(FieldPositionIteratorHandler& fpih, UErrorCode& status) const;
 
    // To give LocalizedNumberRangeFormatter format methods access to this class's constructor:
    friend class LocalizedNumberRangeFormatter;
};

class U_I18N_API NumberRangeFormatter final {
  public:
    static UnlocalizedNumberRangeFormatter with();

    static LocalizedNumberRangeFormatter withLocale(const Locale &locale);

    NumberRangeFormatter() = delete;
};
 
}  // namespace number
U_NAMESPACE_END
 
#endif /* #if !UCONFIG_NO_FORMATTING */
 
#endif /* U_SHOW_CPLUSPLUS_API */
 
#endif // __NUMBERRANGEFORMATTER_H__