feat: add localization for internal widget

Cargo.toml

@@ -8,7 +8,7 @@ rust-version = "1.71"
 name = "cosmic"
 
 [features]
-default = ["clipboard"]
+default = ["clipboard", "localization"]
 # Accessibility support
 a11y = ["iced/a11y", "iced_accessibility"]
 # Builds support for animated images
@@ -70,6 +70,7 @@ winit_tokio = ["winit", "tokio"]
 winit_wgpu = ["winit", "wgpu"]
 # Enables XDG portal integrations
 xdg-portal = ["ashpd"]
+localization = ["i18n-embed", "rust-embed", "i18n-embed-fl"]
 
 [dependencies]
 apply = "0.3.0"
@@ -84,11 +85,14 @@ derive_setters = "0.1.5"
 fraction = "0.15.3"
 image = { version = "0.25.1", optional = true }
 lazy_static = "1.4.0"
-libc = { version = "0.2.155", optional  = true }
+libc = { version = "0.2.155", optional = true }
 mime = { version = "0.3.17", optional = true }
 palette = "0.7.3"
 rfd = { version = "0.14.0", optional = true }
-rustix = { version = "0.38.34", features = ["pipe", "process"], optional = true }
+rustix = { version = "0.38.34", features = [
+    "pipe",
+    "process",
+], optional = true }
 serde = { version = "1.0.180", features = ["derive"] }
 slotmap = "1.0.6"
 smol = { version = "2.0.0", optional = true }
@@ -99,6 +103,12 @@ tracing = "0.1"
 unicode-segmentation = "1.6"
 url = "2.4.0"
 zbus = { version = "4.2.1", default-features = false, optional = true }
+i18n-embed = { version = "0.14", features = [
+    "fluent-system",
+    "desktop-requester",
+], optional = true }
+rust-embed = { version = "8.0", optional = true }
+i18n-embed-fl = { version = "0.8", optional = true }
 
 [target.'cfg(unix)'.dependencies]
 freedesktop-icons = "0.2.5"

i18n.toml

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

i18n/en/libcosmic.ftl

@@ -0,0 +1 @@
+close = Close

i18n/fr/libcosmic.ftl

@@ -0,0 +1 @@
+close = Fermer

src/app/mod.rs

@@ -161,6 +161,9 @@ pub(crate) fn iced_settings<App: Application>(
 pub fn run<App: Application>(settings: Settings, flags: App::Flags) -> iced::Result {
     let settings = iced_settings::<App>(settings, flags);
 
+    #[cfg(feature = "localization")]
+    crate::localize::localize();
+
     cosmic::Cosmic::<App>::run(settings)
 }
 

src/lib.rs

@@ -91,6 +91,10 @@ pub use cctk;
 
 pub mod theme;
 
+#[cfg(feature = "localization")]
+#[macro_use]
+pub mod localize;
+
 #[doc(inline)]
 pub use theme::{style, Theme};
 

src/localize.rs

@@ -0,0 +1,46 @@
+use i18n_embed::{
+    fluent::{fluent_language_loader, FluentLanguageLoader},
+    DefaultLocalizer, LanguageLoader, Localizer,
+};
+use rust_embed::RustEmbed;
+
+#[derive(RustEmbed)]
+#[folder = "./i18n/"]
+struct Localizations;
+
+lazy_static::lazy_static! {
+    pub static ref LANGUAGE_LOADER: FluentLanguageLoader = {
+        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.
+fn localizer() -> Box<dyn Localizer> {
+    Box::from(DefaultLocalizer::new(&*LANGUAGE_LOADER, &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 {}", error);
+    }
+}

src/widget/context_drawer/widget.rs

@@ -54,15 +54,20 @@ impl<'a, Message: Clone + 'static> ContextDrawer<'a, Message> {
                     .vertical_alignment(alignment::Vertical::Center),
             )
             .push(
-                button::text("Close")
+                button::text(
-                    .trailing_icon(icon::from_name("go-next-symbolic"))
+                    #[cfg(feature = "localization")]
-                    .on_press(on_close)
+                    fl!("close"),
-                    .style(crate::theme::Button::Link)
+                    #[cfg(not(feature = "localization"))]
-                    .apply(container)
+                    "Close",
-                    .width(Length::FillPortion(1))
+                )
-                    .height(Length::Fill)
+                .trailing_icon(icon::from_name("go-next-symbolic"))
-                    .align_x(alignment::Horizontal::Right)
+                .on_press(on_close)
-                    .center_y(),
+                .style(crate::theme::Button::Link)
+                .apply(container)
+                .width(Length::FillPortion(1))
+                .height(Length::Fill)
+                .align_x(alignment::Horizontal::Right)
+                .center_y(),
             )
             // XXX must be done after pushing elements or it may be overwritten by size hints from contents
             .height(Length::Fixed(80.0))