1 files changed, 128 insertions, 0 deletions
diff --git a/battery-bar.sh b/battery-bar.sh
new file mode 100755
index 0000000..df34643
--- /dev/null
+++ b/battery-bar.sh
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+#!/bin/sh
+# Battery status display script for systems with /sys/class/power_supply
+
+SYS_BASE="/sys/class/power_supply"
+
+# Read battery energy values
+# Returns: "energy_now energy_full" or exits with error
+read_battery() {
+    bat="$1"
+    base="$SYS_BASE/$bat"
+    
+    [ -r "$base/energy_now" ] || return 1
+    [ -r "$base/energy_full" ] || return 1
+    
+    energy_now=$(cat "$base/energy_now" 2>/dev/null) || return 1
+    energy_full=$(cat "$base/energy_full" 2>/dev/null) || return 1
+    
+    # Validate numeric values
+    case "$energy_now" in
+        ''|*[!0-9]*) return 1 ;;
+    esac
+    case "$energy_full" in
+        ''|*[!0-9]*) return 1 ;;
+    esac
+    
+    echo "$energy_now $energy_full"
+}
+
+# Determine battery state symbol based on status of all batteries
+battery_state_symbol() {
+    charging=0
+    discharging=0
+    full=0
+    not_charging=0
+    bat_found=0
+    
+    for bat in BAT0 BAT1; do
+        status_path="$SYS_BASE/$bat/status"
+        [ -r "$status_path" ] || continue
+        
+        bat_found=1
+        status=$(cat "$status_path" 2>/dev/null | tr -d '\n')
+        case "$status" in
+            Charging)
+                charging=1
+                ;;
+            Discharging)
+                discharging=1
+                ;;
+            Full)
+                full=1
+                ;;
+            "Not charging")
+                not_charging=1
+                ;;
+        esac
+    done
+    
+    # No batteries found
+    [ "$bat_found" -eq 0 ] && echo " " && return 1
+    
+    # Priority: charging > discharging > not_charging > full
+    # If any battery is charging, show charging
+    [ "$charging" -eq 1 ] && echo "⁺" && return 0
+    # If any battery is discharging, show discharging
+    [ "$discharging" -eq 1 ] && echo "⁻" && return 0
+    # If any battery is not charging (plugged but not charging)
+    [ "$not_charging" -eq 1 ] && echo "˜" && return 0
+    # All batteries full
+    [ "$full" -eq 1 ] && echo "=" && return 0
+    
+    # Unknown status
+    echo " "
+    return 1
+}
+
+battery_bar() {
+    percent="$1"
+    
+    [ "$percent" -lt 0 ] && percent=0
+    [ "$percent" -gt 100 ] && percent=100
+    
+    filled=$((percent / 10))
+    empty=$((10 - filled))
+    
+    bar=""
+    i=0
+    while [ "$i" -lt "$filled" ]; do
+        bar="${bar}█"
+        i=$((i + 1))
+    done
+    
+    i=0
+    while [ "$i" -lt "$empty" ]; do
+        bar="${bar}░"
+        i=$((i + 1))
+    done
+    
+    echo "$bar"
+}
+
+battery_summary() {
+    total_now=0
+    total_full=0
+    bat_count=0
+    
+    for bat in BAT0 BAT1; do
+        vals=$(read_battery "$bat") || continue
+        set -- $vals
+        total_now=$((total_now + $1))
+        total_full=$((total_full + $2))
+        bat_count=$((bat_count + 1))
+    done
+    
+    if [ "$bat_count" -eq 0 ] || [ "$total_full" -eq 0 ]; then
+        echo "No battery"
+        return 1
+    fi
+    
+    percent=$(( (total_now * 100 + total_full / 2) / total_full ))
+    
+    bar=$(battery_bar "$percent")
+    symbol=$(battery_state_symbol)
+    
+    echo "▕${bar}▏${percent}${symbol}"
+}
+
+battery_summary