1 // © 2020 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 4 #include "unicode/utypes.h" 5 6 #if !UCONFIG_NO_FORMATTING 7 #ifndef __NUMBER_USAGEPREFS_H__ 8 #define __NUMBER_USAGEPREFS_H__ 9 10 #include "cmemory.h" 11 #include "number_types.h" 12 #include "unicode/listformatter.h" 13 #include "unicode/localpointer.h" 14 #include "unicode/locid.h" 15 #include "unicode/measunit.h" 16 #include "unicode/stringpiece.h" 17 #include "unicode/uobject.h" 18 #include "units_converter.h" 19 #include "units_router.h" 20 21 U_NAMESPACE_BEGIN 22 23 using ::icu::units::ComplexUnitsConverter; 24 using ::icu::units::UnitsRouter; 25 26 namespace number { 27 namespace impl { 28 29 /** 30 * A MicroPropsGenerator which uses UnitsRouter to produce output converted to a 31 * MeasureUnit appropriate for a particular localized usage: see 32 * NumberFormatterSettings::usage(). 33 */ 34 class U_I18N_API UsagePrefsHandler : public MicroPropsGenerator, public UMemory { 35 public: 36 UsagePrefsHandler(const Locale &locale, const MeasureUnit &inputUnit, const StringPiece usage, 37 const MicroPropsGenerator *parent, UErrorCode &status); 38 39 /** 40 * Obtains the appropriate output value, MeasureUnit and 41 * rounding/precision behaviour from the UnitsRouter. 42 * 43 * The output unit is passed on to the LongNameHandler via 44 * micros.outputUnit. 45 */ 46 void processQuantity(DecimalQuantity &quantity, MicroProps µs, 47 UErrorCode &status) const U_OVERRIDE; 48 49 /** 50 * Returns the list of possible output units, i.e. the full set of 51 * preferences, for the localized, usage-specific unit preferences. 52 * 53 * The returned pointer should be valid for the lifetime of the 54 * UsagePrefsHandler instance. 55 */ getOutputUnits()56 const MaybeStackVector<MeasureUnit> *getOutputUnits() const { 57 return fUnitsRouter.getOutputUnits(); 58 } 59 60 private: 61 UnitsRouter fUnitsRouter; 62 const MicroPropsGenerator *fParent; 63 }; 64 65 } // namespace impl 66 } // namespace number 67 68 // Export explicit template instantiations of LocalPointerBase and LocalPointer. 69 // This is required when building DLLs for Windows. (See datefmt.h, 70 // collationiterator.h, erarules.h and others for similar examples.) 71 // 72 // Note: These need to be outside of the number::impl namespace, or Clang will 73 // generate a compile error. 74 #if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN 75 #if defined(_MSC_VER) 76 // Ignore warning 4661 as LocalPointerBase does not use operator== or operator!= 77 #pragma warning(push) 78 #pragma warning(disable: 4661) 79 #endif 80 template class U_I18N_API LocalPointerBase<ComplexUnitsConverter>; 81 template class U_I18N_API LocalPointer<ComplexUnitsConverter>; 82 #if defined(_MSC_VER) 83 #pragma warning(pop) 84 #endif 85 #endif 86 87 namespace number { 88 namespace impl { 89 90 /** 91 * A MicroPropsGenerator which converts a measurement from one MeasureUnit to 92 * another. In particular, the output MeasureUnit may be a mixed unit. (The 93 * input unit may not be a mixed unit.) 94 */ 95 class U_I18N_API UnitConversionHandler : public MicroPropsGenerator, public UMemory { 96 public: 97 /** 98 * Constructor. 99 * 100 * @param inputUnit Specifies the input MeasureUnit. Mixed units are not 101 * supported as input (because input is just a single decimal quantity). 102 * @param outputUnit Specifies the output MeasureUnit. 103 * @param parent The parent MicroPropsGenerator. 104 * @param status Receives status. 105 */ 106 UnitConversionHandler(const MeasureUnit &inputUnit, const MeasureUnit &outputUnit, 107 const MicroPropsGenerator *parent, UErrorCode &status); 108 109 /** 110 * Obtains the appropriate output values from the Unit Converter. 111 */ 112 void processQuantity(DecimalQuantity &quantity, MicroProps µs, 113 UErrorCode &status) const U_OVERRIDE; 114 private: 115 MeasureUnit fOutputUnit; 116 LocalPointer<ComplexUnitsConverter> fUnitConverter; 117 const MicroPropsGenerator *fParent; 118 }; 119 120 } // namespace impl 121 } // namespace number 122 U_NAMESPACE_END 123 124 #endif // __NUMBER_USAGEPREFS_H__ 125 #endif /* #if !UCONFIG_NO_FORMATTING */ 126