Use refresh_interval from (default) Config; battery module improvements

src/bar.rs

@@ -27,6 +27,8 @@ pub fn start() {
     env_logger::Builder::from_env(Env::default().default_filter_or("warn"))
         .init();
 
+    let config = config::Config::default();
+
     thread::spawn(handle_input);
     let mods: Vec<Box<dyn BarModuleFn>> = vec![
         module::window::BarModuleWindow::create(
@@ -42,14 +44,14 @@ pub fn start() {
             module::date::BarModuleDate::default_config("0".to_owned()),
         ),
     ];
-    generate_status(&mods);
+    generate_status(&mods, config.refresh_interval);
 }
 
 pub fn handle_input() {
     // TODO: Read stdin and react to click events.
 }
 
-pub fn generate_status(mods: &[Box<dyn BarModuleFn>]) {
+pub fn generate_status(mods: &[Box<dyn BarModuleFn>], refresh_interval: u64) {
     println!("{{\"version\": 1}}");
     // status_command should output an infinite array meaning we emit an
     // opening [ and never the closing bracket.
@@ -63,6 +65,6 @@ pub fn generate_status(mods: &[Box<dyn BarModuleFn>]) {
         let json = serde_json::to_string_pretty(&blocks)
             .unwrap_or_else(|_| "".to_string());
         println!("{},", json);
-        thread::sleep(std::time::Duration::from_secs(1));
+        thread::sleep(std::time::Duration::from_millis(refresh_interval));
     }
 }

src/bar/config.rs

@@ -19,7 +19,10 @@ use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Config {
-    pub refresh_interval: f32,
+    /// The status is refreshed every `refresh_interval` milliseconds.
+    pub refresh_interval: u64,
+    /// The list of modules to display in the given order, each one specified
+    /// as `"<module_type>/<instance>"`.
     pub modules: Vec<String>,
     pub module_configs: Vec<ModuleConfig>,
 }
@@ -35,7 +38,7 @@ pub struct ModuleConfig {
 impl Default for Config {
     fn default() -> Self {
         Config {
-            refresh_interval: 1.0,
+            refresh_interval: 1000,
             modules: vec!["date/0".to_owned()],
             module_configs: vec![],
         }

src/bar/module/battery.rs

@@ -20,6 +20,7 @@ use crate::bar::module::BarModuleFn;
 use crate::fmt_replace::fmt_replace;
 use battery as bat;
 use std::cell::RefCell;
+use std::collections::HashSet;
 use swaybar_types as s;
 
 pub struct BarModuleBattery {
@@ -49,6 +50,9 @@ fn get_text(
 ) -> String {
     match get_refreshed_batteries(manager) {
         Ok(bats) => {
+            if bats.is_empty() {
+                return String::new();
+            }
             fmt_replace!(&cfg.format, cfg.html_escape, {
                 "state_of_charge" => bats.iter()
                     .map(|b| b.state_of_charge().value)
@@ -58,10 +62,28 @@ fn get_text(
                     .map(|b| b.state_of_health().value)
                     .sum::<f32>()
                     / bats.len() as f32 * 100_f32,
-                "state" => bats.iter()
-                    .map(|b| format!("{:?}", b.state()))
-                    .next()
-                    .unwrap_or_default(),
+                "state" => {
+                    let states = bats.iter()
+                        .map(|b| format!("{:?}", b.state()))
+                        .collect::<HashSet<String>>();
+                    if states.len() == 1 {
+                        states.iter().next().unwrap().to_owned()
+                    } else {
+                        let mut comma_sep_string = String::from("[");
+                        let mut first = true;
+                        for state in states {
+                            if first {
+                                comma_sep_string = comma_sep_string + &state;
+                                first = false;
+                            } else {
+                                comma_sep_string = comma_sep_string
+                                    + ", " + &state;
+                            }
+                        }
+                        comma_sep_string += "]";
+                        comma_sep_string
+                    }
+                },
             })
         }
         Err(err) => format!("{}", err),