Initial commit

lib/lain/widget/alsa.lua

@@ -0,0 +1,57 @@
+--[[
+
+     Licensed under GNU General Public License v2
+      * (c) 2013, Luca CPZ
+      * (c) 2010, Adrian C. <anrxc@sysphere.org>
+
+--]]
+
+local helpers = require('lain.helpers')
+local shell = require('awful.util').shell
+local wibox = require('wibox')
+local string = string
+
+-- ALSA volume
+-- lain.widget.alsa
+
+local function factory(args)
+	args = args or {}
+	local alsa = { widget = args.widget or wibox.widget.textbox() }
+	local timeout = args.timeout or 5
+	local settings = args.settings or function() end
+
+	alsa.cmd = args.cmd or 'amixer'
+	alsa.channel = args.channel or 'Master'
+	alsa.togglechannel = args.togglechannel
+
+	local format_cmd = string.format('%s get %s', alsa.cmd, alsa.channel)
+
+	if alsa.togglechannel then
+		format_cmd = {
+			shell,
+			'-c',
+			string.format('%s get %s; %s get %s', alsa.cmd, alsa.channel, alsa.cmd, alsa.togglechannel),
+		}
+	end
+
+	alsa.last = {}
+
+	function alsa.update()
+		helpers.async(format_cmd, function(mixer)
+			local l, s = string.match(mixer, '([%d]+)%%.*%[([%l]*)')
+			l = tonumber(l)
+			if alsa.last.level ~= l or alsa.last.status ~= s then
+				volume_now = { level = l, status = s }
+				widget = alsa.widget
+				settings()
+				alsa.last = volume_now
+			end
+		end)
+	end
+
+	helpers.newtimer(string.format('alsa-%s-%s', alsa.cmd, alsa.channel), timeout, alsa.update)
+
+	return alsa
+end
+
+return factory