[modules] Add redshift module

New module that shows the current state of redshift
(day/night/transition) and, if in transition, also shows
the day/night percentages.

fixes #40

bumblebee/modules/redshift.py

@@ -0,0 +1,46 @@
+# pylint: disable=C0111,R0903
+
+"""Displays the current color temperature of redshift
+
+Requires the following executable:
+    * redshift
+"""
+
+import bumblebee.input
+import bumblebee.output
+import bumblebee.engine
+
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine, config):
+        super(Module, self).__init__(engine, config,
+            bumblebee.output.Widget(full_text=self.text)
+        )
+        self._text = ""
+        self._state = "transition"
+
+    def text(self, widget):
+        return "{}".format(self._text)
+
+    def update(self, widgets):
+        result = bumblebee.util.execute("redshift -p")
+
+        temp = ""
+        transition = ""
+        for line in result.split("\n"):
+            if "temperature" in line.lower():
+                temp = line.split(" ")[2]
+            if "period" in line.lower():
+                state = line.split(" ")[1].lower()
+                if "day" in state:
+                    self._state = "day"
+                elif "night" in state:
+                    self._state = "night"
+                else:
+                    self._state = "transition"
+                    transition = " ".join(line.split(" ")[2:])
+        self._text = "{} {}".format(temp, transition)
+
+    def state(self, widget):
+        return self._state
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

themes/icons/ascii.json

@@ -52,5 +52,8 @@
 	},
 	"xrandr": {
 		"on": { "prefix": " off "}, "off": { "prefix": " on "}
+	},
+	"redshift": {
+		"day": { "prefix": "day" }, "night": { "prefix": "night" }, "transition": { "prefix": "trans" }
 	}
 }

themes/icons/awesome-fonts.json

@@ -63,6 +63,9 @@
 		"activated": {"prefix": " " }, "deactivated": { "prefix": " " }
 	},
 	"xrandr": {
-		"on": { "prefix": " "}, "off": { "prefix": " "}
+		"on": { "prefix": " "}, "off": { "prefix": " " }
+	},
+	"redshift": {
+		"day": { "prefix": "" }, "night": { "prefix": "" }, "transition": { "prefix": "" }
 	}
 }