[modules/brightness] Re-import brightness module

modules/core/brightness.py

@@ -0,0 +1,63 @@
+# pylint: disable=C0111,R0903
+
+"""Displays the brightness of a display
+
+Parameters:
+    * brightness.step: The amount of increase/decrease on scroll in % (defaults to 2)
+    * brightness.device_path: The device path (defaults to /sys/class/backlight/intel_backlight), can contain wildcards (in this case, the first matching path will be used)
+
+"""
+
+import bumblebee.util
+import bumblebee.input
+import bumblebee.output
+import bumblebee.engine
+
+import glob
+
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine, config):
+        super(Module, self).__init__(engine, config,
+                                     bumblebee.output.Widget(full_text=self.brightness))
+        self._brightness = 0
+
+        self._device_path = self.find_device(self.parameter("device_path", "/sys/class/backlight/intel_backlight"))
+        step = self.parameter("step", 2)
+
+        if bumblebee.util.which("light"):
+            self.register_cmd(engine, "light -A {}%".format(step),
+                              "light -U {}%".format(step))
+        elif bumblebee.util.which("brightnessctl"):
+            self.register_cmd(engine, "brightnessctl s {}%+".format(step),
+                              "brightnessctl s {}%-".format(step))
+        else:
+            self.register_cmd(engine, "xbacklight +{}%".format(step),
+                              "xbacklight -{}%".format(step))
+
+    def find_device(self, device_path):
+        res = glob.glob(device_path)
+        if len(res) == 0:
+            return device_path
+        return res[0]
+
+    def register_cmd(self, engine, upCmd, downCmd):
+        engine.input.register_callback(self, button=bumblebee.input.WHEEL_UP, cmd=upCmd)
+        engine.input.register_callback(self, button=bumblebee.input.WHEEL_DOWN, cmd=downCmd)
+
+    def brightness(self, widget):
+        if isinstance(self._brightness, float):
+            return "{:3.0f}%".format(self._brightness).strip()
+        else:
+            return "n/a"
+
+    def update(self, widgets):
+        try:
+            with open("{}/brightness".format(self._device_path)) as f:
+                backlight = int(f.readline())
+            with open("{}/max_brightness".format(self._device_path)) as f:
+                max_brightness = int(f.readline())
+                self._brightness = float(backlight * 100 / max_brightness)
+        except:
+            return "Error"
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4