/** * This is the "brain" of the number formatting pipeline. It ties all the pieces together, taking in a MacroProps and a * DecimalQuantity and outputting a properly formatted number string.
*/ class NumberFormatterImpl : public UMemory { public: /** * Builds a "safe" MicroPropsGenerator, which is thread-safe and can be used repeatedly. * The caller owns the returned NumberFormatterImpl.
*/
NumberFormatterImpl(const MacroProps ¯os, UErrorCode &status);
/** * Default constructor; leaves the NumberFormatterImpl in an undefined state. * Takes an error code to prevent the method from being called accidentally.
*/
NumberFormatterImpl(UErrorCode &) {}
/** * Builds and evaluates an "unsafe" MicroPropsGenerator, which is cheaper but can be used only once.
*/ static int32_t formatStatic(const MacroProps ¯os, UFormattedNumberData *results,
UErrorCode &status);
/** * Prints only the prefix and suffix; used for DecimalFormat getters. * * @return The index into the output at which the prefix ends and the suffix starts; in other words, * the prefix length.
*/ static int32_t getPrefixSuffixStatic(const MacroProps& macros, Signum signum,
StandardPlural::Form plural, FormattedStringBuilder& outString,
UErrorCode& status);
/** * Evaluates the "safe" MicroPropsGenerator created by "fromMacros".
*/
int32_t format(UFormattedNumberData *results, UErrorCode &status) const;
/** * Like format(), but saves the result into an output MicroProps without additional processing.
*/ void preProcess(DecimalQuantity& inValue, MicroProps& microsOut, UErrorCode& status) const;
/** * Like getPrefixSuffixStatic() but uses the safe compiled object.
*/
int32_t getPrefixSuffix(Signum signum, StandardPlural::Form plural, FormattedStringBuilder& outString,
UErrorCode& status) const;
/** * Synthesizes the output string from a MicroProps and DecimalQuantity. * This method formats only the main number, not affixes.
*/ static int32_t writeNumber( const SimpleMicroProps& micros,
DecimalQuantity& quantity,
FormattedStringBuilder& string,
int32_t index,
UErrorCode& status);
/** * Adds the affixes. Intended to be called immediately after formatNumber.
*/ static int32_t writeAffixes( const MicroProps& micros,
FormattedStringBuilder& string,
int32_t start,
int32_t end,
UErrorCode& status);
private: // Head of the MicroPropsGenerator linked list. Subclasses' processQuantity // methods process this list in a parent-first order, such that the last // item added, which this points to, typically has its logic executed last. const MicroPropsGenerator *fMicroPropsGenerator = nullptr;
// Tail of the list:
MicroProps fMicros;
// Other fields possibly used by the number formatting pipeline: // TODO: Convert more of these LocalPointers to value objects to reduce the number of news?
LocalPointer<const UsagePrefsHandler> fUsagePrefsHandler;
LocalPointer<const UnitConversionHandler> fUnitConversionHandler;
LocalPointer<const DecimalFormatSymbols> fSymbols;
LocalPointer<const PluralRules> fRules;
LocalPointer<const ParsedPatternInfo> fPatternInfo;
LocalPointer<const ScientificHandler> fScientificHandler;
LocalPointer<MutablePatternModifier> fPatternModifier;
LocalPointer<ImmutablePatternModifier> fImmutablePatternModifier;
LocalPointer<LongNameHandler> fLongNameHandler; // TODO: use a common base class that enables fLongNameHandler, // fLongNameMultiplexer, and fMixedUnitLongNameHandler to be merged into one // member?
LocalPointer<MixedUnitLongNameHandler> fMixedUnitLongNameHandler;
LocalPointer<const LongNameMultiplexer> fLongNameMultiplexer;
LocalPointer<const CompactHandler> fCompactHandler;
/** * If rulesPtr is non-null, return it. Otherwise, return a PluralRules owned by this object for the * specified locale, creating it if necessary.
*/ const PluralRules *
resolvePluralRules(const PluralRules *rulesPtr, const Locale &locale, UErrorCode &status);
/** * Synthesizes the MacroProps into a MicroPropsGenerator. All information, including the locale, is encoded into the * MicroPropsGenerator, except for the quantity itself, which is left abstract and must be provided to the returned * MicroPropsGenerator instance. * * @see MicroPropsGenerator * @param macros * The {@link MacroProps} to consume. This method does not mutate the MacroProps instance. * @param safe * If true, the returned MicroPropsGenerator will be thread-safe. If false, the returned value will * <em>not</em> be thread-safe, intended for a single "one-shot" use only. Building the thread-safe * object is more expensive.
*/ const MicroPropsGenerator *
macrosToMicroGenerator(const MacroProps ¯os, bool safe, UErrorCode &status);
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