feat(clock): localization support

Cargo.lock

@@ -440,6 +440,7 @@ dependencies = [
  "iana-time-zone",
  "js-sys",
  "num-traits",
+ "pure-rust-locales",
  "time 0.1.45",
  "wasm-bindgen",
  "winapi",
@@ -2246,6 +2247,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "pure-rust-locales"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b45c49fc4f91f35bae654f85ebb3a44d60ac64f11b3166ffa609def390c732d8"
+
 [[package]]
 name = "quick-xml"
 version = "0.23.1"

Cargo.toml

@@ -110,7 +110,7 @@ reqwest = { version = "0.11.18", optional = true }
 nix = { version = "0.26.2", optional = true, features = ["event"] }
 
 # clock
-chrono = { version = "0.4.26", optional = true }
+chrono = { version = "0.4.26", optional = true, features = ["unstable-locales"] }
 
 # music
 mpd_client = { version = "1.2.0", optional = true }

docs/modules/Clock.md

@@ -9,9 +9,10 @@ Clicking on the widget opens a popup with the time and a calendar.
 > Type: `clock`
 
 | Name           | Type     | Default                            | Description                                                                         |
-|----------------|----------|------------------|---------------------------------------------------------|
+|----------------|----------|------------------------------------|-------------------------------------------------------------------------------------|
 | `format`       | `string` | `%d/%m/%Y %H:%M`                   | Date/time format string.                                                            |
 | `format_popup` | `string` | `%H:%M:%S`                         | Date/time format string to display in the popup header.                             |
+| `locale`       | `string` | `$LC_TIME` or `$LANG` or `'POSIX'` | Locale to use (eg `en_GB`). Defaults to the system language (reading from env var). |
 
 > Detail on available tokens can be found here: <https://docs.rs/chrono/latest/chrono/format/strftime/index.html>
 

src/modules/clock.rs

@@ -3,12 +3,13 @@ use crate::gtk_helpers::add_class;
 use crate::modules::{Module, ModuleInfo, ModuleUpdateEvent, ModuleWidget, WidgetContext};
 use crate::popup::Popup;
 use crate::{send_async, try_send};
-use chrono::{DateTime, Local};
+use chrono::{DateTime, Local, Locale};
 use color_eyre::Result;
 use glib::Continue;
 use gtk::prelude::*;
 use gtk::{Align, Button, Calendar, Label, Orientation};
 use serde::Deserialize;
+use std::env;
 use tokio::spawn;
 use tokio::sync::mpsc;
 use tokio::time::sleep;
@@ -26,6 +27,9 @@ pub struct ClockModule {
     #[serde(default = "default_popup_format")]
     format_popup: String,
 
+    #[serde(default = "default_locale")]
+    locale: String,
+
     #[serde(flatten)]
     pub common: Option<CommonConfig>,
 }
@@ -38,6 +42,20 @@ fn default_popup_format() -> String {
     String::from("%H:%M:%S")
 }
 
+fn default_locale() -> String {
+    env::var("LC_TIME")
+        .or_else(|_| env::var("LANG"))
+        .map(strip_tail)
+        .unwrap_or_else(|_| "POSIX".to_string())
+}
+
+fn strip_tail(string: String) -> String {
+    string
+        .split_once('.')
+        .map(|(head, _)| head.to_string())
+        .unwrap_or(string)
+}
+
 impl Module<Button> for ClockModule {
     type SendMessage = DateTime<Local>;
     type ReceiveMessage = ();
@@ -82,9 +100,10 @@ impl Module<Button> for ClockModule {
         });
 
         let format = self.format.clone();
+        let locale = Locale::try_from(self.locale.as_str()).unwrap_or(Locale::POSIX);
 
         context.widget_rx.attach(None, move |date| {
-            let date_string = format!("{}", date.format(&format));
+            let date_string = format!("{}", date.format_localized(&format, locale));
             label.set_label(&date_string);
             Continue(true)
         });
@@ -115,8 +134,10 @@ impl Module<Button> for ClockModule {
         container.add(&calendar);
 
         let format = self.format_popup;
+        let locale = Locale::try_from(self.locale.as_str()).unwrap_or(Locale::POSIX);
+
         rx.attach(None, move |date| {
-            let date_string = format!("{}", date.format(&format));
+            let date_string = format!("{}", date.format_localized(&format, locale));
             clock.set_label(&date_string);
             Continue(true)
         });