feat: project fluent i18n

Cargo.toml

@@ -31,6 +31,9 @@ cosmic-theme = { git = "https://github.com/pop-os/cosmic-theme" }
 xdg = "2.4.0"
 anyhow = "1.0.56"
 freedesktop-desktop-entry = "0.5.0"
+i18n-embed = { version = "0.13.4", features = ["fluent-system", "desktop-requester"] }
+i18n-embed-fl = "0.6.4"
+rust-embed = "6.3.0"
 
 [features]
 default = ["dev"]

data/com.System76.CosmicLauncher.metainfo.xml

@@ -3,8 +3,7 @@
 <component type="desktop-application">
   <id>com.system76.CosmicLauncher</id>
   <metadata_license>CC0</metadata_license>
-  <!-- Insert your license of choice here -->
-  <!-- <project_license>MIT</project_license> -->
+  <project_license>MPL</project_license>
   <name>Cosmic Launcher</name>
   <summary>Write a GTK + Rust application</summary>
   <description>

i18n.toml

@@ -0,0 +1,4 @@
+fallback_language = "en"
+
+[fluent]
+assets_dir = "i18n"

i18n/en/cosmic_launcher.ftl

@@ -0,0 +1 @@
+cosmic-launcher = Cosmic Launcher

src/application.rs

@@ -3,7 +3,7 @@
 use crate::search_result_object::SearchResultObject;
 use crate::utils::BoxedSearchResult;
 use gtk4::{gdk::Display, gio, glib, prelude::*, subclass::prelude::*, CssProvider, StyleContext};
-use log::debug;
+use log::{debug, info};
 use once_cell::sync::OnceCell;
 use tokio::{runtime::Runtime, sync::mpsc};
 use tokio_stream::StreamExt;
@@ -181,6 +181,8 @@ impl CosmicLauncherApplication {
 
     pub fn run(&self) {
         ApplicationExtManual::run(self);
+        info!("Cosmic Launcher ({})", config::APP_ID);
+        info!("Version: {}", config::VERSION);
     }
 }
 

src/localize.rs

@@ -0,0 +1,36 @@
+use i18n_embed::{
+    fluent::{fluent_language_loader, FluentLanguageLoader},
+    DefaultLocalizer, LanguageLoader, Localizer,
+};
+use once_cell::sync::Lazy;
+use rust_embed::RustEmbed;
+
+#[derive(RustEmbed)]
+#[folder = "i18n/"]
+struct Localizations;
+
+pub static LANGUAGE_LOADER: Lazy<FluentLanguageLoader> = Lazy::new(|| {
+    let loader: FluentLanguageLoader = fluent_language_loader!();
+
+    loader
+        .load_fallback_language(&Localizations)
+        .expect("Error while loading fallback language");
+
+    loader
+});
+
+#[macro_export]
+macro_rules! fl {
+    ($message_id:literal) => {{
+        i18n_embed_fl::fl!($crate::localize::LANGUAGE_LOADER, $message_id)
+    }};
+
+    ($message_id:literal, $($args:expr),*) => {{
+        i18n_embed_fl::fl!($crate::localize::LANGUAGE_LOADER, $message_id, $($args), *)
+    }};
+}
+
+// Get the `Localizer` to be used for localizing this library.
+pub fn localizer() -> Box<dyn Localizer> {
+    Box::from(DefaultLocalizer::new(&*LANGUAGE_LOADER, &Localizations))
+}

src/main.rs

@@ -6,6 +6,7 @@ mod desktop_entry_data;
 mod search_result_object;
 mod search_result_row;
 
+mod localize;
 mod utils;
 mod window;
 use gtk4::{gio, glib};
@@ -15,12 +16,25 @@ use self::config::RESOURCES_FILE;
 
 use self::application::CosmicLauncherApplication;
 
+pub fn localize() {
+    let localizer = crate::localize::localizer();
+    let requested_languages = i18n_embed::DesktopLanguageRequester::requested_languages();
+
+    if let Err(error) = localizer.select(&requested_languages) {
+        eprintln!(
+            "Error while loading language for pop-desktop-widget {}",
+            error
+        );
+    }
+}
+
 fn main() {
     // Initialize logger
     pretty_env_logger::init();
 
-    glib::set_application_name("Cosmic Launcher");
+    glib::set_application_name(config::APP_ID);
 
+    localize();
     let res = gio::Resource::load(RESOURCES_FILE).expect("Could not load gresource file");
     gio::resources_register(&res);
     let rt = Runtime::new().unwrap();

src/window.rs

@@ -2,10 +2,12 @@
 
 use crate::{
     application::{CosmicLauncherApplication, Event, TX},
+    fl,
     search_result_object::SearchResultObject,
     search_result_row::SearchResultRow,
     utils,
 };
+
 use cascade::cascade;
 use gdk4_x11::X11Display;
 use gtk4::{
@@ -69,7 +71,7 @@ impl CosmicLauncherWindow {
         cascade! {
             &self_;
             ..set_width_request(600);
-            ..set_title(Some("Cosmic Launcher"));
+            ..set_title(Some(&fl!("cosmic-launcher")));
             ..set_decorated(false);
             ..set_resizable(false);
             ..add_css_class("root_window");