1 files changed, 54 insertions, 0 deletions
diff --git a/Scripts/volume-change.py b/Scripts/volume-change.py
new file mode 100755
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--- /dev/null
+++ b/Scripts/volume-change.py
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+#!/usr/bin/python3
+# By: Garrett Holbrook
+# Date: August 27th, 2015
+#
+# Usage: Changes the system volume through amixer and then 
+#        makes a dbus method call to the gnome shell to get the
+#        gnome volume OSD (On Screen Display)
+#
+# Requires: python3 and python-dbus (on Arch) or python3-dbus
+#           (on Debian) or equivalent
+import dbus
+import sys
+from subprocess import getoutput
+
+# Getting the dbus interface to communicate with gnome's OSD
+session_bus = dbus.SessionBus()
+proxy = session_bus.get_object('org.gnome.Shell', '/org/gnome/Shell')
+interface = dbus.Interface(proxy, 'org.gnome.Shell')
+
+# Interpreting how to affect the volume and by what percentage and
+# then creating a bash command that will reduce the stdout to the
+# new percentage volume. Vol = volume
+vol_action = sys.argv[1]
+vol_percent_change = sys.argv[2]
+
+command = 'amixer -D pulse sset Master ' + vol_percent_change + '%'
+
+if vol_action == 'increase':
+    command += '+ > /dev/null && amixer -D pulse set Master unmute'
+else:
+    command += '-'
+
+command += ' | grep -oP "\[\d*%\]" | head -n 1 | sed s:[][%]::g'
+
+current_vol_percentage = int(getoutput(command))
+# If it's 0 then add mute flag (tigger sub-action, keyboard ligth for example)
+if current_vol_percentage == 0:
+	getoutput('amixer -D pulse set Master mute');
+
+# Determining which logo to use based off of the percentage
+logo = 'audio-volume-'
+if current_vol_percentage == 0:
+	logo += 'muted'
+elif current_vol_percentage < 30:
+    logo += 'low'
+elif current_vol_percentage < 70:
+    logo += 'medium'
+else:
+    logo += 'high'
+logo += '-symbolic'
+
+# Make the dbus method call
+interface.ShowOSD({"icon":logo, "level":current_vol_percentage})
+