waybar: heat-colour CPU/memory/wifi %/temperature values via pango

3 files changed, 60 insertions, 4 deletions

diff --git a/dot_config/waybar/config.jsonc b/dot_config/waybar/config.jsonc
index b4d03ab..585fa38 100644
--- a/dot_config/waybar/config.jsonc
+++ b/dot_config/waybar/config.jsonc
@@ -27,19 +27,40 @@
 
   "cpu": {
     "format": "CPU {usage}%",
+    "format-low": "CPU <span color='#b8bb26'>{usage}%</span>",
+    "format-medium": "CPU <span color='#fabd2f'>{usage}%</span>",
+    "format-high": "CPU <span color='#fe8019'>{usage}%</span>",
+    "format-critical": "CPU <span color='#fb4934'>{usage}%</span>",
+    "states": {
+      "low": 0,
+      "medium": 30,
+      "high": 60,
+      "critical": 80,
+    },
     "interval": 5,
     "tooltip": false,
   },
 
   "custom/memory": {
-    "exec": "awk '/^MemTotal:/{t=$2} /^MemAvailable:/{a=$2} END{u=t-a; printf \"MEM %.1fG (%d%%) / %.1fG (%d%%)\\n\", u/1048576, u*100/t, a/1048576, a*100/t}' /proc/meminfo",
+    "exec": "~/.config/waybar/memory-status.sh",
+    "return-type": "json",
     "interval": 10,
     "tooltip": false,
   },
 
   "temperature": {
     "format": "{temperatureC}°C",
-    "critical-threshold": 80,
+    "format-cool": "<span color='#b8bb26'>{temperatureC}°C</span>",
+    "format-warm": "<span color='#fabd2f'>{temperatureC}°C</span>",
+    "format-hot": "<span color='#fe8019'>{temperatureC}°C</span>",
+    "format-scorching": "<span color='#fb4934'>{temperatureC}°C</span>",
+    "states": {
+      "cool": 0,
+      "warm": 50,
+      "hot": 65,
+      "scorching": 80,
+    },
+    "interval": 5,
   },
 
   "custom/wifi": {
diff --git a/dot_config/waybar/executable_memory-status.sh b/dot_config/waybar/executable_memory-status.sh
new file mode 100755
index 0000000..c68f5a4
--- /dev/null
+++ b/dot_config/waybar/executable_memory-status.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Emit waybar JSON with memory usage. Used% uses a heat scale (green → red),
+# available% uses the inverse (red → green). Values embedded via Pango span.
+set -eu
+
+awk '
+function heat(p) {
+	if (p < 30) return "#b8bb26"
+	if (p < 60) return "#fabd2f"
+	if (p < 80) return "#fe8019"
+	return "#fb4934"
+}
+function cool(p) {
+	if (p < 20) return "#fb4934"
+	if (p < 40) return "#fe8019"
+	if (p < 70) return "#fabd2f"
+	return "#b8bb26"
+}
+/^MemTotal:/     { t = $2 }
+/^MemAvailable:/ { a = $2 }
+END {
+	u  = t - a
+	up = u * 100 / t
+	ap = a * 100 / t
+	printf "{\"text\":\"MEM %.1fG (<span color=\x27%s\x27>%d%%</span>) / %.1fG (<span color=\x27%s\x27>%d%%</span>)\"}\n", \
+		u / 1048576, heat(up), up, \
+		a / 1048576, cool(ap), ap
+}
+' /proc/meminfo
diff --git a/dot_config/waybar/executable_wifi-status.sh b/dot_config/waybar/executable_wifi-status.sh
index b93a28c..e69e5bb 100755
--- a/dot_config/waybar/executable_wifi-status.sh
+++ b/dot_config/waybar/executable_wifi-status.sh
@@ -22,6 +22,12 @@ rssi=$(printf '%s\n' "$out" |
   sed -n 's/^[[:space:]]*\*\{0,1\}[[:space:]]*AverageRSSI[[:space:]]\{2,\}//p' |
   awk '{print $1; exit}')
 pct=$(awk -v r="${rssi:-0}" 'BEGIN{p=2*(r+100); if(p>100)p=100; if(p<0)p=0; printf "%d",p}')
+color=$(awk -v p="$pct" 'BEGIN{
+	if (p < 20) print "#fb4934"
+	else if (p < 40) print "#fe8019"
+	else if (p < 70) print "#fabd2f"
+	else print "#b8bb26"
+}')
 
-printf '{"text":"%s %s%%","class":"up","tooltip":"%s · %s dBm"}\n' \
-  "$ssid" "$pct" "$iface" "$rssi"
+printf '{"text":"%s <span color=\x27%s\x27>%s%%</span>","class":"up","tooltip":"%s · %s dBm"}\n' \
+  "$ssid" "$color" "$pct" "$iface" "$rssi"