Add localization

src/greeter.rs

@@ -108,6 +108,8 @@ fn user_data_fallback() -> Vec<UserData> {
 }
 
 pub fn main() -> Result<(), Box<dyn Error>> {
+    crate::localize::localize();
+
     let mut user_datas = match futures::executor::block_on(async { user_data_dbus().await }) {
         Ok(ok) => ok,
         Err(err) => {

src/lib.rs

@@ -2,9 +2,11 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 pub mod greeter;
-mod image_container;
 pub mod locker;
 
+mod image_container;
+mod localize;
+
 #[cfg(feature = "logind")]
 mod logind;
 

src/localize.rs

@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+use std::sync::OnceLock;
+
+use i18n_embed::{
+    fluent::{fluent_language_loader, FluentLanguageLoader},
+    DefaultLocalizer, LanguageLoader, Localizer,
+};
+use rust_embed::RustEmbed;
+
+#[derive(RustEmbed)]
+#[folder = "i18n/"]
+struct Localizations;
+
+pub static LANGUAGE_LOADER: OnceLock<FluentLanguageLoader> = OnceLock::new();
+
+#[macro_export]
+macro_rules! fl {
+    ($message_id:literal) => {{
+        i18n_embed_fl::fl!($crate::localize::LANGUAGE_LOADER.get().unwrap(), $message_id)
+    }};
+
+    ($message_id:literal, $($args:expr),*) => {{
+        i18n_embed_fl::fl!($crate::localize::LANGUAGE_LOADER.get().unwrap(), $message_id, $($args), *)
+    }};
+}
+
+// Get the `Localizer` to be used for localizing this library.
+pub fn localizer() -> Box<dyn Localizer> {
+    LANGUAGE_LOADER.get_or_init(|| {
+        let loader: FluentLanguageLoader = fluent_language_loader!();
+
+        loader
+            .load_fallback_language(&Localizations)
+            .expect("Error while loading fallback language");
+
+        loader
+    });
+
+    Box::from(DefaultLocalizer::new(
+        LANGUAGE_LOADER.get().unwrap(),
+        &Localizations,
+    ))
+}
+
+pub fn localize() {
+    let localizer = localizer();
+    let requested_languages = i18n_embed::DesktopLanguageRequester::requested_languages();
+
+    if let Err(error) = localizer.select(&requested_languages) {
+        eprintln!("Error while loading language for App List {}", error);
+    }
+}

src/locker.rs

@@ -33,6 +33,8 @@ use tokio::{sync::mpsc, task, time};
 use wayland_client::{protocol::wl_output::WlOutput, Proxy};
 
 pub fn main(current_user: pwd::Passwd) -> Result<(), Box<dyn std::error::Error>> {
+    crate::localize::localize();
+
     //TODO: use accountsservice
     let icon_path = Path::new("/var/lib/AccountsService/icons").join(&current_user.name);
     let icon_opt = if icon_path.is_file() {