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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
//! Experimental.
use fixed_decimal::SignedFixedDecimal;
use icu_decimal::{
options::FixedDecimalFormatterOptions, FixedDecimalFormatter, FixedDecimalFormatterPreferences,
};
use icu_locale_core::preferences::{
define_preferences, extensions::unicode::keywords::NumberingSystem, prefs_convert,
};
use icu_plurals::PluralRulesPreferences;
use icu_provider::prelude::*;
use super::super::provider::currency::CurrencyEssentialsV1Marker;
use super::format::FormattedCurrency;
use super::options::CurrencyFormatterOptions;
use super::CurrencyCode;
extern crate alloc;
define_preferences!(
/// The preferences for currency formatting.
[Copy]
CurrencyFormatterPreferences,
{
/// The user's preferred numbering system.
///
/// Corresponds to the `-u-nu` in Unicode Locale Identifier.
numbering_system: NumberingSystem
}
);
prefs_convert!(
CurrencyFormatterPreferences,
FixedDecimalFormatterPreferences,
{ numbering_system }
);
prefs_convert!(CurrencyFormatterPreferences, PluralRulesPreferences);
/// A formatter for monetary values.
///
/// [`CurrencyFormatter`] supports:
/// 1. Rendering in the locale's currency system.
/// 2. Locale-sensitive grouping separator positions.
///
/// Read more about the options in the [`super::options`] module.
pub struct CurrencyFormatter {
/// Options bag for the currency formatter to determine the behavior of the formatter.
/// for example: currency width.
options: CurrencyFormatterOptions,
/// Essential data for the currency formatter.
essential: DataPayload<CurrencyEssentialsV1Marker>,
/// A [`FixedDecimalFormatter`] to format the currency value.
fixed_decimal_formatter: FixedDecimalFormatter,
}
impl CurrencyFormatter {
icu_provider::gen_any_buffer_data_constructors!(
(prefs: CurrencyFormatterPreferences, options: super::options::CurrencyFormatterOptions) -> error: DataError,
functions: [
try_new: skip,
try_new_with_any_provider,
try_new_with_buffer_provider,
try_new_unstable,
Self
]
);
/// Creates a new [`CurrencyFormatter`] from compiled locale data and an options bag.
///
/// ✨ *Enabled with the `compiled_data` Cargo feature.*
///
/// [📚 Help choosing a constructor](icu_provider::constructors)
#[cfg(feature = "compiled_data")]
pub fn try_new(
prefs: CurrencyFormatterPreferences,
options: super::options::CurrencyFormatterOptions,
) -> Result<Self, DataError> {
let locale =
DataLocale::from_preferences_locale::<CurrencyEssentialsV1Marker>(prefs.locale_prefs);
let fixed_decimal_formatter = FixedDecimalFormatter::try_new(
(&prefs).into(),
FixedDecimalFormatterOptions::default(),
)?;
let essential = crate::provider::Baked
.load(DataRequest {
id: DataIdentifierBorrowed::for_locale(&locale),
..Default::default()
})?
.payload;
Ok(Self {
options,
essential,
fixed_decimal_formatter,
})
}
#[doc = icu_provider::gen_any_buffer_unstable_docs!(UNSTABLE, Self::try_new)]
pub fn try_new_unstable<D>(
provider: &D,
prefs: CurrencyFormatterPreferences,
options: super::options::CurrencyFormatterOptions,
) -> Result<Self, DataError>
where
D: ?Sized
+ DataProvider<super::super::provider::currency::CurrencyEssentialsV1Marker>
+ DataProvider<icu_decimal::provider::DecimalSymbolsV2Marker>
+ DataProvider<icu_decimal::provider::DecimalDigitsV1Marker>,
{
let locale =
DataLocale::from_preferences_locale::<CurrencyEssentialsV1Marker>(prefs.locale_prefs);
let fixed_decimal_formatter = FixedDecimalFormatter::try_new_unstable(
provider,
(&prefs).into(),
FixedDecimalFormatterOptions::default(),
)?;
let essential = provider
.load(DataRequest {
id: DataIdentifierBorrowed::for_locale(&locale),
..Default::default()
})?
.payload;
Ok(Self {
options,
essential,
fixed_decimal_formatter,
})
}
/// Formats a [`SignedFixedDecimal`] value for the given currency code.
///
/// # Examples
/// ```
/// use icu::experimental::dimension::currency::formatter::CurrencyFormatter;
/// use icu::experimental::dimension::currency::CurrencyCode;
/// use icu::locale::locale;
/// use tinystr::*;
/// use writeable::Writeable;
///
/// let locale = locale!("en-US").into();
/// let fmt = CurrencyFormatter::try_new(locale, Default::default()).unwrap();
/// let value = "12345.67".parse().unwrap();
/// let currency_code = CurrencyCode(tinystr!(3, "USD"));
/// let formatted_currency = fmt.format_fixed_decimal(&value, currency_code);
/// let mut sink = String::new();
/// formatted_currency.write_to(&mut sink).unwrap();
/// assert_eq!(sink.as_str(), "$12,345.67");
/// ```
pub fn format_fixed_decimal<'l>(
&'l self,
value: &'l SignedFixedDecimal,
currency_code: CurrencyCode,
) -> FormattedCurrency<'l> {
FormattedCurrency {
value,
currency_code,
options: &self.options,
essential: self.essential.get(),
fixed_decimal_formatter: &self.fixed_decimal_formatter,
}
}
}