6 files changed, 310 insertions, 0 deletions
diff --git a/intl/locale/rust/fluent-langneg-ffi/Cargo.toml b/intl/locale/rust/fluent-langneg-ffi/Cargo.toml
new file mode 100644
index 0000000000..88d6bad4d4
--- /dev/null
+++ b/intl/locale/rust/fluent-langneg-ffi/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "fluent-langneg-ffi"
+version = "0.1.0"
+license = "MPL-2.0"
+authors = ["Zibi Braniecki <zibi@braniecki.net>"]
+edition = "2018"
+
+[dependencies]
+nsstring = { path = "../../../../xpcom/rust/nsstring" }
+thin-vec = { version = "0.2.1", features = ["gecko-ffi"] }
+fluent-langneg = { version = "0.13", features = ["cldr"] }
+unic-langid = "0.9"
+unic-langid-ffi = { path = "../unic-langid-ffi" }
diff --git a/intl/locale/rust/fluent-langneg-ffi/cbindgen.toml b/intl/locale/rust/fluent-langneg-ffi/cbindgen.toml
new file mode 100644
index 0000000000..98ec15d389
--- /dev/null
+++ b/intl/locale/rust/fluent-langneg-ffi/cbindgen.toml
@@ -0,0 +1,17 @@
+header = """/* 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/. */"""
+autogen_warning = """/* DO NOT MODIFY THIS MANUALLY! This file was generated using cbindgen. See RunCbindgen.py */
+#ifndef mozilla_intl_locale_MozLocaleBindings_h
+#error "Don't include this file directly, instead include MozLocaleBindings.h"
+#endif
+"""
+include_version = true
+braces = "SameLine"
+line_length = 100
+tab_width = 2
+language = "C++"
+namespaces = ["mozilla", "intl", "ffi"]
+
+[export.rename]
+"ThinVec" = "nsTArray"
diff --git a/intl/locale/rust/fluent-langneg-ffi/src/lib.rs b/intl/locale/rust/fluent-langneg-ffi/src/lib.rs
new file mode 100644
index 0000000000..591e9ef861
--- /dev/null
+++ b/intl/locale/rust/fluent-langneg-ffi/src/lib.rs
@@ -0,0 +1,79 @@
+/* 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());
+    }
+}
diff --git a/intl/locale/rust/unic-langid-ffi/Cargo.toml b/intl/locale/rust/unic-langid-ffi/Cargo.toml
new file mode 100644
index 0000000000..bd969437a6
--- /dev/null
+++ b/intl/locale/rust/unic-langid-ffi/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "unic-langid-ffi"
+version = "0.1.0"
+license = "MPL-2.0"
+authors = ["Zibi Braniecki <zibi@braniecki.net>"]
+edition = "2018"
+
+[dependencies]
+nsstring = { path = "../../../../xpcom/rust/nsstring" }
+thin-vec = { version = "0.2.1", features = ["gecko-ffi"] }
+unic-langid = { version = "0.9", features = ["likelysubtags"] }
diff --git a/intl/locale/rust/unic-langid-ffi/cbindgen.toml b/intl/locale/rust/unic-langid-ffi/cbindgen.toml
new file mode 100644
index 0000000000..3842e5183b
--- /dev/null
+++ b/intl/locale/rust/unic-langid-ffi/cbindgen.toml
@@ -0,0 +1,22 @@
+header = """/* 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/. */"""
+autogen_warning = """/* DO NOT MODIFY THIS MANUALLY! This file was generated using cbindgen. See RunCbindgen.py */
+#ifndef mozilla_intl_locale_MozLocaleBindings_h
+#error "Don't include this file directly, instead include MozLocaleBindings.h"
+#endif
+"""
+include_version = true
+braces = "SameLine"
+line_length = 100
+tab_width = 2
+language = "C++"
+namespaces = ["mozilla", "intl", "ffi"]
+
+[parse]
+parse_deps = true
+include = ["unic-langid", "unic-langid-impl"]
+
+[export.rename]
+"ThinVec" = "nsTArray"
+"nsCStr" = "nsDependentCSubstring"
diff --git a/intl/locale/rust/unic-langid-ffi/src/lib.rs b/intl/locale/rust/unic-langid-ffi/src/lib.rs
new file mode 100644
index 0000000000..804a4341e1
--- /dev/null
+++ b/intl/locale/rust/unic-langid-ffi/src/lib.rs
@@ -0,0 +1,168 @@
+/* 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 nsstring::{nsACString, nsCStr, nsCString};
+use thin_vec::ThinVec;
+pub use unic_langid::{subtags, CharacterDirection, LanguageIdentifier, LanguageIdentifierError};
+
+pub fn new_langid_for_mozilla(
+    name: &nsACString,
+) -> Result<LanguageIdentifier, LanguageIdentifierError> {
+    if name.eq_ignore_ascii_case(b"ja-jp-mac") {
+        "ja-JP-macos".parse()
+    } else {
+        // Cut out any `.FOO` like `en-US.POSIX`.
+        let mut name: &[u8] = name.as_ref();
+        if let Some(ptr) = name.iter().position(|b| b == &b'.') {
+            name = &name[..ptr];
+        }
+        LanguageIdentifier::from_bytes(name)
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_canonicalize(name: &mut nsACString) -> bool {
+    let langid = new_langid_for_mozilla(name);
+
+    let result = langid.is_ok();
+
+    name.assign(&langid.unwrap_or_default().to_string());
+
+    result
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_new(
+    name: &nsACString,
+    ret_val: &mut bool,
+) -> *mut LanguageIdentifier {
+    let langid = new_langid_for_mozilla(name);
+
+    *ret_val = langid.is_ok();
+    Box::into_raw(Box::new(langid.unwrap_or_default()))
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn unic_langid_destroy(langid: *mut LanguageIdentifier) {
+    let _ = Box::from_raw(langid);
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_as_string(langid: &mut LanguageIdentifier, ret_val: &mut nsACString) {
+    ret_val.assign(&langid.to_string());
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_get_language<'a>(
+    langid: &'a LanguageIdentifier,
+    out: &mut nsCStr<'a>,
+) {
+    *out = nsCStr::from(langid.language.as_str());
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_set_language(
+    langid: &mut LanguageIdentifier,
+    string: &nsACString,
+) -> bool {
+    subtags::Language::from_bytes(string)
+        .map(|lang| langid.language = lang)
+        .is_ok()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_clear_language(langid: &mut LanguageIdentifier) {
+    langid.language.clear()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_get_script<'a>(langid: &'a LanguageIdentifier, out: &mut nsCStr<'a>) {
+    *out = nsCStr::from(langid.script.as_ref().map_or("", |s| s.as_str()));
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_set_script(
+    langid: &mut LanguageIdentifier,
+    string: &nsACString,
+) -> bool {
+    subtags::Script::from_bytes(string)
+        .map(|script| langid.script = Some(script))
+        .is_ok()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_clear_script(langid: &mut LanguageIdentifier) {
+    langid.script = None;
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_get_region<'a>(langid: &'a LanguageIdentifier, out: &mut nsCStr<'a>) {
+    *out = nsCStr::from(langid.region.as_ref().map_or("", |s| s.as_str()));
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_set_region(
+    langid: &mut LanguageIdentifier,
+    string: &nsACString,
+) -> bool {
+    subtags::Region::from_bytes(string)
+        .map(|region| langid.region = Some(region))
+        .is_ok()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_clear_region(langid: &mut LanguageIdentifier) {
+    langid.region = None;
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_get_variants(
+    langid: &LanguageIdentifier,
+    variants: &mut ThinVec<nsCString>,
+) {
+    for v in langid.variants() {
+        variants.push(v.as_str().into());
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_set_variants(
+    langid: &mut LanguageIdentifier,
+    variants: &ThinVec<nsCString>,
+) -> bool {
+    variants
+        .iter()
+        .map(|v| subtags::Variant::from_bytes(v))
+        .collect::<Result<Vec<_>, _>>()
+        .map(|variants| langid.set_variants(&variants))
+        .is_ok()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_clear_variants(langid: &mut LanguageIdentifier) {
+    langid.clear_variants()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_matches(
+    langid: &LanguageIdentifier,
+    other: &LanguageIdentifier,
+    self_as_range: bool,
+    other_as_range: bool,
+) -> bool {
+    langid.matches(other, self_as_range, other_as_range)
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_maximize(langid: &mut LanguageIdentifier) -> bool {
+    langid.maximize()
+}
+
+#[no_mangle]
+pub extern "C" fn unic_langid_is_rtl(name: &nsACString) -> bool {
+    match new_langid_for_mozilla(name) {
+        Ok(langid) => langid.character_direction() == CharacterDirection::RTL,
+        Err(_) => false,
+    }
+}