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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /intl/locale/rust/fluent-langneg-ffi/src/lib.rs
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'intl/locale/rust/fluent-langneg-ffi/src/lib.rs')
-rw-r--r--intl/locale/rust/fluent-langneg-ffi/src/lib.rs79
1 files changed, 79 insertions, 0 deletions
diff --git a/intl/locale/rust/fluent-langneg-ffi/src/lib.rs b/intl/locale/rust/fluent-langneg-ffi/src/lib.rs
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+++ b/intl/locale/rust/fluent-langneg-ffi/src/lib.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use fluent_langneg::negotiate::NegotiationStrategy as LangNegNegotiationStrategy;
+use fluent_langneg::negotiate_languages;
+use nsstring::nsACString;
+use nsstring::nsCString;
+use thin_vec::ThinVec;
+use unic_langid::{LanguageIdentifier, LanguageIdentifierError};
+use unic_langid_ffi::new_langid_for_mozilla;
+
+/// We want to return the exact strings that were passed to us out of the
+/// available and default pool. Since for the negotiation we canonicalize them
+/// in `LanguageIdentifier`, this struct will preserve the original, non-canonicalized
+/// string, and then use it to populate return array.
+#[derive(Debug, PartialEq)]
+struct LangIdString<'l> {
+ pub source: &'l nsCString,
+ pub langid: LanguageIdentifier,
+}
+
+impl<'l> LangIdString<'l> {
+ pub fn try_new(s: &'l nsCString) -> Result<Self, LanguageIdentifierError> {
+ new_langid_for_mozilla(s).map(|l| LangIdString {
+ source: s,
+ langid: l,
+ })
+ }
+}
+
+impl<'l> AsRef<LanguageIdentifier> for LangIdString<'l> {
+ fn as_ref(&self) -> &LanguageIdentifier {
+ &self.langid
+ }
+}
+
+#[repr(C)]
+pub enum NegotiationStrategy {
+ Filtering,
+ Matching,
+ Lookup,
+}
+
+fn get_strategy(input: NegotiationStrategy) -> LangNegNegotiationStrategy {
+ match input {
+ NegotiationStrategy::Filtering => LangNegNegotiationStrategy::Filtering,
+ NegotiationStrategy::Matching => LangNegNegotiationStrategy::Matching,
+ NegotiationStrategy::Lookup => LangNegNegotiationStrategy::Lookup,
+ }
+}
+
+#[no_mangle]
+pub extern "C" fn fluent_langneg_negotiate_languages(
+ requested: &ThinVec<nsCString>,
+ available: &ThinVec<nsCString>,
+ default: &nsACString,
+ strategy: NegotiationStrategy,
+ result: &mut ThinVec<nsCString>,
+) {
+ let requested = requested
+ .iter()
+ .filter_map(|s| new_langid_for_mozilla(s).ok())
+ .collect::<Vec<_>>();
+
+ let available = available
+ .iter()
+ .filter_map(|s| LangIdString::try_new(s).ok())
+ .collect::<Vec<_>>();
+
+ let d: nsCString = default.into();
+ let default = LangIdString::try_new(&d).ok();
+
+ let strategy = get_strategy(strategy);
+
+ for l in negotiate_languages(&requested, &available, default.as_ref(), strategy) {
+ result.push(l.source.clone());
+ }
+}