127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
// © 2020 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#ifndef __NUMBER_USAGEPREFS_H__
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#define __NUMBER_USAGEPREFS_H__
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#include "cmemory.h"
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#include "number_types.h"
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#include "unicode/listformatter.h"
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#include "unicode/localpointer.h"
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#include "unicode/locid.h"
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#include "unicode/measunit.h"
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#include "unicode/stringpiece.h"
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#include "unicode/uobject.h"
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#include "units_converter.h"
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#include "units_router.h"
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U_NAMESPACE_BEGIN
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using ::icu::units::ComplexUnitsConverter;
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using ::icu::units::UnitsRouter;
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namespace number {
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namespace impl {
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/**
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* A MicroPropsGenerator which uses UnitsRouter to produce output converted to a
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* MeasureUnit appropriate for a particular localized usage: see
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* NumberFormatterSettings::usage().
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*/
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class U_I18N_API UsagePrefsHandler : public MicroPropsGenerator, public UMemory {
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public:
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UsagePrefsHandler(const Locale &locale, const MeasureUnit &inputUnit, const StringPiece usage,
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const MicroPropsGenerator *parent, UErrorCode &status);
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/**
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* Obtains the appropriate output value, MeasureUnit and
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* rounding/precision behaviour from the UnitsRouter.
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*
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* The output unit is passed on to the LongNameHandler via
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* micros.outputUnit.
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*/
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void processQuantity(DecimalQuantity &quantity, MicroProps µs,
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UErrorCode &status) const U_OVERRIDE;
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/**
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* Returns the list of possible output units, i.e. the full set of
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* preferences, for the localized, usage-specific unit preferences.
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*
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* The returned pointer should be valid for the lifetime of the
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* UsagePrefsHandler instance.
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*/
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const MaybeStackVector<MeasureUnit> *getOutputUnits() const {
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return fUnitsRouter.getOutputUnits();
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}
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private:
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UnitsRouter fUnitsRouter;
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const MicroPropsGenerator *fParent;
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};
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} // namespace impl
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} // namespace number
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// Export explicit template instantiations of LocalPointerBase and LocalPointer.
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// This is required when building DLLs for Windows. (See datefmt.h,
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// collationiterator.h, erarules.h and others for similar examples.)
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//
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// Note: These need to be outside of the number::impl namespace, or Clang will
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// generate a compile error.
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#if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
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#if defined(_MSC_VER)
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// Ignore warning 4661 as LocalPointerBase does not use operator== or operator!=
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#pragma warning(push)
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#pragma warning(disable: 4661)
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#endif
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template class U_I18N_API LocalPointerBase<ComplexUnitsConverter>;
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template class U_I18N_API LocalPointer<ComplexUnitsConverter>;
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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#endif
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namespace number {
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namespace impl {
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/**
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* A MicroPropsGenerator which converts a measurement from one MeasureUnit to
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* another. In particular, the output MeasureUnit may be a mixed unit. (The
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* input unit may not be a mixed unit.)
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*/
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class U_I18N_API UnitConversionHandler : public MicroPropsGenerator, public UMemory {
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public:
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/**
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* Constructor.
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*
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* @param targetUnit Specifies the output MeasureUnit. The input MeasureUnit
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* is derived from it: in case of a mixed unit, the biggest unit is
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* taken as the input unit. If not a mixed unit, the input unit will be
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* the same as the output unit and no unit conversion takes place.
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* @param parent The parent MicroPropsGenerator.
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* @param status Receives status.
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*/
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UnitConversionHandler(const MeasureUnit &targetUnit, const MicroPropsGenerator *parent,
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UErrorCode &status);
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/**
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* Obtains the appropriate output values from the Unit Converter.
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*/
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void processQuantity(DecimalQuantity &quantity, MicroProps µs,
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UErrorCode &status) const U_OVERRIDE;
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private:
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MeasureUnit fOutputUnit;
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LocalPointer<ComplexUnitsConverter> fUnitConverter;
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const MicroPropsGenerator *fParent;
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};
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} // namespace impl
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} // namespace number
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U_NAMESPACE_END
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#endif // __NUMBER_USAGEPREFS_H__
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#endif /* #if !UCONFIG_NO_FORMATTING */
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