Initial commit

lib/lain/widget/alsabar.lua

@@ -0,0 +1,172 @@
+--[[
+
+     Licensed under GNU General Public License v2
+      * (c) 2013, Luca CPZ
+      * (c) 2013, Rman
+
+--]]
+
+local helpers = require('lain.helpers')
+local awful = require('awful')
+local naughty = require('naughty')
+local wibox = require('wibox')
+local math = math
+local string = string
+local type = type
+local tonumber = tonumber
+
+-- ALSA volume bar
+-- lain.widget.alsabar
+
+local function factory(args)
+	local alsabar = {
+		colors = {
+			background = '#000000',
+			mute = '#EB8F8F',
+			unmute = '#A4CE8A',
+		},
+
+		_current_level = 0,
+		_playback = 'off',
+	}
+
+	args = args or {}
+
+	local timeout = args.timeout or 5
+	local settings = args.settings or function() end
+	local width = args.width or 63
+	local height = args.height or 1
+	local margins = args.margins or 1
+	local ticks = args.ticks or false
+	local ticks_size = args.ticks_size or 7
+	local tick = args.tick or '|'
+	local tick_pre = args.tick_pre or '['
+	local tick_post = args.tick_post or ']'
+	local tick_none = args.tick_none or ' '
+
+	alsabar.cmd = args.cmd or 'amixer'
+	alsabar.channel = args.channel or 'Master'
+	alsabar.togglechannel = args.togglechannel
+	alsabar.colors = args.colors or alsabar.colors
+	alsabar.followtag = args.followtag or false
+	alsabar.notification_preset = args.notification_preset
+
+	if not alsabar.notification_preset then
+		alsabar.notification_preset = { font = 'Monospace 10' }
+	end
+
+	local format_cmd = string.format('%s get %s', alsabar.cmd, alsabar.channel)
+
+	if alsabar.togglechannel then
+		format_cmd = {
+			awful.util.shell,
+			'-c',
+			string.format('%s get %s; %s get %s', alsabar.cmd, alsabar.channel, alsabar.cmd, alsabar.togglechannel),
+		}
+	end
+
+	alsabar.bar = wibox.widget({
+		color = alsabar.colors.unmute,
+		background_color = alsabar.colors.background,
+		forced_height = height,
+		forced_width = width,
+		margins = margins,
+		paddings = margins,
+		ticks = ticks,
+		ticks_size = ticks_size,
+		widget = wibox.widget.progressbar,
+	})
+
+	alsabar.tooltip = awful.tooltip({ objects = { alsabar.bar } })
+
+	function alsabar.update(callback)
+		helpers.async(format_cmd, function(mixer)
+			local vol, playback = string.match(mixer, '([%d]+)%%.*%[([%l]*)')
+
+			if not vol or not playback then
+				return
+			end
+
+			if vol ~= alsabar._current_level or playback ~= alsabar._playback then
+				alsabar._current_level = tonumber(vol)
+				alsabar.bar:set_value(alsabar._current_level / 100)
+				if alsabar._current_level == 0 or playback == 'off' then
+					alsabar._playback = playback
+					alsabar.tooltip:set_text('[Muted]')
+					alsabar.bar.color = alsabar.colors.mute
+				else
+					alsabar._playback = 'on'
+					alsabar.tooltip:set_text(string.format('%s: %s', alsabar.channel, vol))
+					alsabar.bar.color = alsabar.colors.unmute
+				end
+
+				volume_now = {
+					level = alsabar._current_level,
+					status = alsabar._playback,
+				}
+
+				settings()
+
+				if type(callback) == 'function' then
+					callback()
+				end
+			end
+		end)
+	end
+
+	function alsabar.notify()
+		alsabar.update(function()
+			local preset = alsabar.notification_preset
+
+			preset.title = string.format('%s - %s%%', alsabar.channel, alsabar._current_level)
+
+			if alsabar._playback == 'off' then
+				preset.title = preset.title .. ' Muted'
+			end
+
+			-- tot is the maximum number of ticks to display in the notification
+			local tot = alsabar.notification_preset.max_ticks
+
+			if not tot then
+				local wib = awful.screen.focused().mywibox
+				-- if we can grab mywibox, tot is defined as its height if
+				-- horizontal, or width otherwise
+				if wib then
+					if wib.position == 'left' or wib.position == 'right' then
+						tot = wib.width
+					else
+						tot = wib.height
+					end
+				-- fallback: default horizontal wibox height
+				else
+					tot = 20
+				end
+			end
+
+			local int = math.modf((alsabar._current_level / 100) * tot)
+			preset.text =
+				string.format('%s%s%s%s', tick_pre, string.rep(tick, int), string.rep(tick_none, tot - int), tick_post)
+
+			if alsabar.followtag then
+				preset.screen = awful.screen.focused()
+			end
+
+			if not alsabar.notification then
+				alsabar.notification = naughty.notify({
+					preset = preset,
+					destroy = function()
+						alsabar.notification = nil
+					end,
+				})
+			else
+				naughty.replace_text(alsabar.notification, preset.title, preset.text)
+			end
+		end)
+	end
+
+	helpers.newtimer(string.format('alsabar-%s-%s', alsabar.cmd, alsabar.channel), timeout, alsabar.update)
+
+	return alsabar
+end
+
+return factory