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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 ).
#[diplomat::bridge]
pub mod ffi {
use crate::errors::ffi::ICU4XError;
use crate::provider::ffi::ICU4XDataProvider;
use alloc::boxed::Box;
use core::convert::TryFrom;
use icu_segmenter::{
GraphemeClusterBreakIteratorLatin1, GraphemeClusterBreakIteratorPotentiallyIllFormedUtf8,
GraphemeClusterBreakIteratorUtf16, GraphemeClusterSegmenter,
};
#[diplomat::opaque]
/// An ICU4X grapheme-cluster-break segmenter, capable of finding grapheme cluster breakpoints
/// in strings.
#[diplomat::rust_link(icu::segmenter::GraphemeClusterSegmenter, Struct)]
pub struct ICU4XGraphemeClusterSegmenter(GraphemeClusterSegmenter);
#[diplomat::opaque]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIterator, Struct)]
#[diplomat::rust_link(
icu::segmenter::GraphemeClusterBreakIteratorPotentiallyIllFormedUtf8,
Typedef,
hidden
)]
pub struct ICU4XGraphemeClusterBreakIteratorUtf8<'a>(
GraphemeClusterBreakIteratorPotentiallyIllFormedUtf8<'a, 'a>,
);
#[diplomat::opaque]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIterator, Struct)]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIteratorUtf16, Typedef, hidden)]
pub struct ICU4XGraphemeClusterBreakIteratorUtf16<'a>(
GraphemeClusterBreakIteratorUtf16<'a, 'a>,
);
#[diplomat::opaque]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIterator, Struct)]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIteratorLatin1, Typedef, hidden)]
pub struct ICU4XGraphemeClusterBreakIteratorLatin1<'a>(
GraphemeClusterBreakIteratorLatin1<'a, 'a>,
);
impl ICU4XGraphemeClusterSegmenter {
/// Construct an [`ICU4XGraphemeClusterSegmenter`].
#[diplomat::rust_link(icu::segmenter::GraphemeClusterSegmenter::new, FnInStruct)]
pub fn create(
provider: &ICU4XDataProvider,
) -> Result<Box<ICU4XGraphemeClusterSegmenter>, ICU4XError> {
Ok(Box::new(ICU4XGraphemeClusterSegmenter(call_constructor!(
GraphemeClusterSegmenter::new [r => Ok(r)],
GraphemeClusterSegmenter::try_new_with_any_provider,
GraphemeClusterSegmenter::try_new_with_buffer_provider,
provider,
)?)))
}
/// Segments a (potentially ill-formed) UTF-8 string.
#[diplomat::rust_link(
icu::segmenter::GraphemeClusterSegmenter::segment_str,
FnInStruct,
hidden
)]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterSegmenter::segment_utf8, FnInStruct)]
pub fn segment_utf8<'a>(
&'a self,
input: &'a str,
) -> Box<ICU4XGraphemeClusterBreakIteratorUtf8<'a>> {
let input = input.as_bytes(); // #2520
Box::new(ICU4XGraphemeClusterBreakIteratorUtf8(
self.0.segment_utf8(input),
))
}
/// Segments a UTF-16 string.
#[diplomat::rust_link(icu::segmenter::GraphemeClusterSegmenter::segment_utf16, FnInStruct)]
pub fn segment_utf16<'a>(
&'a self,
input: &'a [u16],
) -> Box<ICU4XGraphemeClusterBreakIteratorUtf16<'a>> {
Box::new(ICU4XGraphemeClusterBreakIteratorUtf16(
self.0.segment_utf16(input),
))
}
/// Segments a Latin-1 string.
#[diplomat::rust_link(icu::segmenter::GraphemeClusterSegmenter::segment_latin1, FnInStruct)]
pub fn segment_latin1<'a>(
&'a self,
input: &'a [u8],
) -> Box<ICU4XGraphemeClusterBreakIteratorLatin1<'a>> {
Box::new(ICU4XGraphemeClusterBreakIteratorLatin1(
self.0.segment_latin1(input),
))
}
}
impl<'a> ICU4XGraphemeClusterBreakIteratorUtf8<'a> {
/// Finds the next breakpoint. Returns -1 if at the end of the string or if the index is
/// out of range of a 32-bit signed integer.
#[allow(clippy::should_implement_trait)]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIterator::next, FnInStruct)]
#[diplomat::rust_link(
icu::segmenter::GraphemeClusterBreakIterator::Item,
AssociatedTypeInStruct,
hidden
)]
pub fn next(&mut self) -> i32 {
self.0
.next()
.and_then(|u| i32::try_from(u).ok())
.unwrap_or(-1)
}
}
impl<'a> ICU4XGraphemeClusterBreakIteratorUtf16<'a> {
/// Finds the next breakpoint. Returns -1 if at the end of the string or if the index is
/// out of range of a 32-bit signed integer.
#[allow(clippy::should_implement_trait)]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIterator::next, FnInStruct)]
#[diplomat::rust_link(
icu::segmenter::GraphemeClusterBreakIterator::Item,
AssociatedTypeInStruct,
hidden
)]
pub fn next(&mut self) -> i32 {
self.0
.next()
.and_then(|u| i32::try_from(u).ok())
.unwrap_or(-1)
}
}
impl<'a> ICU4XGraphemeClusterBreakIteratorLatin1<'a> {
/// Finds the next breakpoint. Returns -1 if at the end of the string or if the index is
/// out of range of a 32-bit signed integer.
#[allow(clippy::should_implement_trait)]
#[diplomat::rust_link(icu::segmenter::GraphemeClusterBreakIterator::next, FnInStruct)]
#[diplomat::rust_link(
icu::segmenter::GraphemeClusterBreakIterator::Item,
AssociatedTypeInStruct,
hidden
)]
pub fn next(&mut self) -> i32 {
self.0
.next()
.and_then(|u| i32::try_from(u).ok())
.unwrap_or(-1)
}
}
}
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