battery: Add symbol

src/config.rs

@@ -73,6 +73,8 @@ pub struct BatteryConfig {
     #[serde(deserialize_with = "deserialize_duration")]
     #[default(_code = "Duration::from_secs(30)")]
     pub update: Duration,
+    #[default(true)]
+    pub use_symbols: bool,
 }
 
 #[derive(SmartDefault, Deserialize, Clone, Debug)]

src/formatting.rs

@@ -0,0 +1,36 @@
+static BATTERY_DISCHARGING_SYMBOLS: &[char] = &[
+    '\u{f008e}', // nf-md-battery_outline (󰂎)
+    '\u{f007a}', // nf-md-battery_10 (󰁺)
+    '\u{f007b}', // nf-md-battery_20 (󰁻)
+    '\u{f007c}', // nf-md-battery_30 (󰁼)
+    '\u{f007d}', // nf-md-battery_40 (󰁽)
+    '\u{f007e}', // nf-md-battery_50 (󰁾)
+    '\u{f007f}', // nf-md-battery_60 (󰁿)
+    '\u{f0080}', // nf-md-battery_70 (󰂀)
+    '\u{f0081}', // nf-md-battery_80 (󰂁)
+    '\u{f0082}', // nf-md-battery_90 (󰂂)
+    '\u{f0079}', // nf-md-battery (󰁹)
+];
+
+static BATTERY_CHARGING_SYMBOLS: &[char] = &[
+    '\u{f089f}', // nf-md-battery_charging_outline (󰢟)
+    '\u{f089c}', // nf-md-battery_charging_10 (󰢜)
+    '\u{f0086}', // nf-md-battery_charging_20 (󰂆)
+    '\u{f0087}', // nf-md-battery_charging_30 (󰂇)
+    '\u{f0088}', // nf-md-battery_charging_40 (󰂈)
+    '\u{f089d}', // nf-md-battery_charging_50 (󰢝)
+    '\u{f0089}', // nf-md-battery_charging_60 (󰂉)
+    '\u{f089e}', // nf-md-battery_charging_70 (󰢞)
+    '\u{f008a}', // nf-md-battery_charging_80 (󰂊)
+    '\u{f008b}', // nf-md-battery_charging_90 (󰂋)
+    '\u{f0085}', // nf-md-battery_charging_100 (󰂅)
+];
+
+pub fn charging_symbol(percentage: f64, charging: bool) -> char {
+    let index = (percentage.clamp(0.0, 100.0) / 10.0).round() as usize;
+    if charging {
+        BATTERY_CHARGING_SYMBOLS[index]
+    } else {
+        BATTERY_DISCHARGING_SYMBOLS[index]
+    }
+}

src/main.rs

@@ -1,4 +1,5 @@
 mod config;
+mod formatting;
 mod generated;
 mod output;
 mod tile;

src/tiles/battery.rs

@@ -1,9 +1,11 @@
 use crate::config::BatteryConfig;
+use crate::formatting::charging_symbol;
 use crate::output::OutputChannel;
 use crate::tile::Block;
 
 use std::convert::Infallible;
 use std::path::Path;
+use std::str::FromStr;
 use tokio::fs::try_exists;
 use tokio::try_join;
 
@@ -22,21 +24,34 @@ pub async fn battery(config: BatteryConfig, output: OutputChannel) -> eyre::Resu
     loop {
         interval.tick().await;
 
-        async fn read_file_to_string(path: &Path) -> eyre::Result<u32> {
+        async fn read_and_parse<T: FromStr + Sync>(path: &Path) -> eyre::Result<T>
+        where
+            <T as FromStr>::Err: Send + Sync + std::error::Error + 'static,
+        {
             Ok(tokio::fs::read_to_string(path).await?.trim_end().parse()?)
         }
 
-        let charge_now = read_file_to_string(&now_path);
-        let charge_total = read_file_to_string(&full_path);
-        let status = read_file_to_string(&status_path);
+        let charge_now = read_and_parse::<f64>(&now_path);
+        let charge_total = read_and_parse::<f64>(&full_path);
+        let status = read_and_parse::<String>(&status_path);
         let (charge_now, charge_total, status) = try_join!(charge_now, charge_total, status)?;
-        let percentage = charge_now * 100 / charge_total;
-        output
-            .send(Block {
-                full_text: format!("{}% {}", percentage, status).into(),
-                short_text: format!("{}%", percentage).into_boxed_str().into(),
+
+        let percentage = charge_now * 100.0 / charge_total;
+        let is_charging = status != "Discharging";
+        let block = if config.use_symbols {
+            let symbol = charging_symbol(percentage, is_charging);
+            Block {
+                full_text: format!("{} {:.0}%", symbol, percentage).into(),
+                short_text: symbol.to_string().into_boxed_str().into(),
                 ..Default::default()
-            })
-            .await?;
+            }
+        } else {
+            Block {
+                full_text: format!("{:.0}% {}", percentage, status).into(),
+                short_text: format!("{:.0}%", percentage).into_boxed_str().into(),
+                ..Default::default()
+            }
+        };
+        output.send(block).await?;
     }
 }