tor-browser

The Tor Browser
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measure_unit_parser.rs (3053B)

      1 // This file is part of ICU4X. For terms of use, please see the file
      2 // called LICENSE at the top level of the ICU4X source tree
      3 // (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
      4 
      5 #[diplomat::bridge]
      6 #[diplomat::abi_rename = "icu4x_{0}_mv1"]
      7 #[diplomat::attr(auto, namespace = "icu4x")]
      8 pub mod ffi {
      9    use alloc::boxed::Box;
     10 
     11    #[cfg(feature = "buffer_provider")]
     12    use crate::unstable::errors::ffi::DataError;
     13    #[cfg(feature = "buffer_provider")]
     14    use crate::unstable::provider::ffi::DataProvider;
     15 
     16    #[diplomat::opaque]
     17    /// An ICU4X Measurement Unit object which represents a single unit of measurement
     18    /// such as `meter`, `second`, `kilometer-per-hour`, `square-meter`, etc.
     19    ///
     20    /// You can create an instance of this object using [`MeasureUnitParser`] by calling the `parse` method.
     21    #[diplomat::rust_link(icu::experimental::measure::measureunit::MeasureUnit, Struct)]
     22    pub struct MeasureUnit(pub icu_experimental::measure::measureunit::MeasureUnit);
     23 
     24    #[diplomat::opaque]
     25    /// An ICU4X Measure Unit Parser object, capable of parsing the CLDR unit identifier (e.g. `meter-per-square-second`) and get the [`MeasureUnit`].
     26    #[diplomat::rust_link(icu::experimental::measure::parser::MeasureUnitParser, Struct)]
     27    pub struct MeasureUnitParser(pub icu_experimental::measure::parser::MeasureUnitParser);
     28 
     29    impl MeasureUnitParser {
     30        /// Construct a new [`MeasureUnitParser`] instance using compiled data.
     31        #[diplomat::rust_link(
     32            icu::experimental::measure::parser::MeasureUnitParser::new,
     33            FnInStruct
     34        )]
     35        #[diplomat::attr(auto, constructor)]
     36        #[cfg(feature = "compiled_data")]
     37        pub fn create() -> Box<MeasureUnitParser> {
     38            Box::new(MeasureUnitParser(
     39                icu_experimental::measure::parser::MeasureUnitParser::default(),
     40            ))
     41        }
     42        /// Construct a new [`MeasureUnitParser`] instance using a particular data source.
     43        #[diplomat::rust_link(
     44            icu::experimental::measure::parser::MeasureUnitParser::new,
     45            FnInStruct
     46        )]
     47        #[diplomat::attr(all(supports = fallible_constructors, supports = named_constructors), named_constructor = "with_provider")]
     48        #[cfg(feature = "buffer_provider")]
     49        pub fn create_with_provider(
     50            provider: &DataProvider,
     51        ) -> Result<Box<MeasureUnitParser>, DataError> {
     52            Ok(Box::new(MeasureUnitParser(
     53                icu_experimental::measure::parser::MeasureUnitParser::try_new_with_buffer_provider(
     54                    provider.get()?,
     55                )?,
     56            )))
     57        }
     58 
     59        #[diplomat::rust_link(
     60            icu::experimental::measure::parser::MeasureUnitParser::parse,
     61            FnInStruct
     62        )]
     63        pub fn parse(&self, unit_id: &DiplomatStr) -> Option<Box<MeasureUnit>> {
     64            self.0
     65                .try_from_utf8(unit_id)
     66                .ok()
     67                .map(MeasureUnit)
     68                .map(Box::new)
     69        }
     70    }
     71 }