Victor Chang | ce4bf3c | 2021-01-19 16:34:24 +0000 | [diff] [blame] | 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 | */ |
| 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 */ |