feat(noctalia): add portable status widgets and idle monitoring

2026-08-03 16:57:19 +02:00
parent ba9c351589
commit 67004150dc
12 changed files with 694 additions and 2 deletions
@@ -0,0 +1,119 @@
+-- Compact, two-line network throughput widget.  It samples the interface used
+-- by the default route so virtual and physical interfaces are not double-counted.
+local command = [[
+iface=$(ip route show default 2>/dev/null | awk '$1 == "default" { for (i = 1; i <= NF; i++) if ($i == "dev") { print $(i + 1); exit } }')
+
+if [ -z "$iface" ]; then
+  for path in /sys/class/net/*; do
+    candidate=${path##*/}
+    [ "$candidate" = "lo" ] && continue
+    [ "$(cat "$path/carrier" 2>/dev/null)" = "1" ] || continue
+    iface=$candidate
+    break
+  done
+fi
+
+[ -n "$iface" ] || exit 1
+awk -v iface="$iface" '$1 ~ ("^" iface ":") { sub(":", "", $1); print iface "\t" $2 "\t" $10; exit }' /proc/net/dev
+]]
+
+local previous = nil
+local request_in_flight = false
+-- 82px accommodates the longest fixed field ("1023 KiB/s") at 10px while
+-- removing the excess side padding from the original 112px capsule.
+local label_width = 82
+
+local function formatRate(bytes_per_second)
+  local units = { "B/s", "KiB/s", "MiB/s", "GiB/s" }
+  local value = bytes_per_second
+  local unit_index = 1
+
+  while value >= 1024 and unit_index < #units do
+    value = value / 1024
+    unit_index = unit_index + 1
+  end
+
+  if unit_index == 1 then
+    return string.format("%d %s", math.floor(value + 0.5), units[unit_index])
+  end
+
+  if value >= 100 then
+    return string.format("%.0f %s", value, units[unit_index])
+  end
+
+  return string.format("%.1f %s", value, units[unit_index])
+end
+
+local function renderLines(download, upload)
+  -- The explicit minimum width and fixed ten-character value field keep the
+  -- capsule width stable while inheriting the bar font used by other modules.
+  barWidget.render(ui.column({ gap = 0, align = "center", minWidth = label_width }, {
+    ui.label({
+      text = string.format("↓ %10s", download),
+      maxLines = 1,
+      fontSize = 10,
+    }),
+    ui.label({
+      text = string.format("↑ %10s", upload),
+      maxLines = 1,
+      fontSize = 10,
+    }),
+  }))
+end
+
+function update()
+  noctalia.setUpdateInterval(2000)
+
+  if request_in_flight then
+    return
+  end
+
+  request_in_flight = true
+  noctalia.runAsync(command, function(result)
+    request_in_flight = false
+
+    if result.exitCode ~= 0 then
+      previous = nil
+      renderLines("—", "—")
+      barWidget.setTooltip("Network throughput unavailable: no active interface")
+      return
+    end
+
+    local iface, received, sent = string.match(
+      result.stdout,
+      "^([^\t]+)\t(%d+)\t(%d+)"
+    )
+    received = tonumber(received)
+    sent = tonumber(sent)
+
+    if iface == nil or received == nil or sent == nil then
+      previous = nil
+      renderLines("—", "—")
+      barWidget.setTooltip("Network throughput unavailable")
+      return
+    end
+
+    local now = os.time()
+    if previous == nil or previous.iface ~= iface or now <= previous.time then
+      previous = { iface = iface, received = received, sent = sent, time = now }
+      renderLines("Sampling…", "Sampling…")
+      barWidget.setTooltip("Sampling network throughput on " .. iface)
+      return
+    end
+
+    local elapsed = now - previous.time
+    local download = math.max(0, (received - previous.received) / elapsed)
+    local upload = math.max(0, (sent - previous.sent) / elapsed)
+    previous = { iface = iface, received = received, sent = sent, time = now }
+
+    renderLines(formatRate(download), formatRate(upload))
+    barWidget.setTooltip(
+      string.format(
+        "%s · Download %s · Upload %s",
+        iface,
+        formatRate(download),
+        formatRate(upload)
+      )
+    )
+  end)
+end