feat: Add new "upower" module

Add a new module that shows the remaining battery power for *any* upower
supported device

bumblebee_status/modules/core/upower.py

@@ -0,0 +1,71 @@
+# pylint: disable=C0111,R0903
+
+"""Displays battery level for upower devices
+
+
+Requirements:
+    * dbus Python module
+    * dbus-compatible power devices
+
+Parameters:
+    * cpu.warning : Warning threshold in % of power remaining (defaults to 20%)
+    * cpu.critical: Critical threshold in % of power remaining (defaults to 10%)
+"""
+
+import core.module
+import core.widget
+import core.input
+
+import util.format
+
+import dbus
+
+
+class Module(core.module.Module):
+    def __init__(self, config, theme):
+        widgets = []
+        super().__init__(config, theme, widgets)
+
+        self._bus = dbus.SystemBus()
+        self._proxy = self._bus.get_object(
+            "org.freedesktop.UPower", "/org/freedesktop/UPower"
+        )
+        self._manager = dbus.Interface(self._proxy, "org.freedesktop.UPower")
+
+        self._update_widgets(widgets)
+
+        core.input.register(
+            self, button=core.input.LEFT_MOUSE, cmd="gnome-system-monitor"
+        )
+
+    def update(self):
+        self._update_widgets(self.widgets())
+
+    def _update_widgets(self, widgets):
+        self.clear_widgets()
+
+        for dev in self._manager.EnumerateDevices():
+            proxy = self._bus.get_object("org.freedesktop.UPower", dev)
+            props = dbus.Interface(proxy, "org.freedesktop.DBus.Properties")
+
+            try:
+                name = props.Get("org.freedesktop.UPower.Device", "Model")
+                perc = props.Get("org.freedesktop.UPower.Device", "Percentage")
+                widget = self.widget(name)
+                if not widget:
+                    widget = self.add_widget(name=name)
+                    widget.full_text("{} {:.0f}%".format(name, perc))
+                    widget.set("percentage", float(perc))
+            except Exception as e:
+                continue
+
+    def state(self, widget):
+        perc = widget.get("percentage", 0.0)
+        if perc < float(self.parameter("critical", 10)):
+            return ["critical"]
+        if perc < float(self.parameter("warning", 20)):
+            return ["warning"]
+        return []
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4