awesomewm/modules/volume/util.lua

local volume = {}



-- Create pamixer option string
volume.pamixer_options = ""
if (config.volume.pamixer_sink ~= "") then
	volume.pamixer_options = volume.pamixer_options .. " --sink " .. config.volume.pamixer_sink
end

volume.commands = {
	up = function(value, callback)
		awful.spawn.easy_async(
			"pamixer --increase " .. value .. " "
			.. volume.pamixer_options,
			function(stdout, stderr, exitreason, exitcode)
				awesome.emit_signal("module::volume:update_read")
				if (callback ~= nil) then
					callback()
				end
			end
		)
	end,

	down = function(value, callback)
		awful.spawn.easy_async(
			"pamixer --decrease " .. value .. " "
			.. volume.pamixer_options,
			function(stdout, stderr, exitreason, exitcode)
				awesome.emit_signal("module::volume:update_read")
				if (callback ~= nil) then
					callback()
				end
			end
		)
	end,

	set = function(value, callback)
		awful.spawn.easy_async(
			"pamixer --set_volume " .. tostring(value) .. " " .. volume.pamixer_options,
			function(stdout, stderr, exitreason, exitcode)
				awesome.emit_signal("module::volume:update_read")
				if (callback ~= nil) then
					callback()
				end
			end
		)
	end,

	mute = function(callback)
		awful.spawn.easy_async(
			"pamixer --mute " .. volume.pamixer_options,
			function(stdout, stderr, exitreason, exitcode)
				awesome.emit_signal("module::volume:update_read")
				if (callback ~= nil) then
					callback()
				end
			end
		)
	end,

	unmute = function(callback)
		awful.spawn.easy_async(
			"pamixer --unmute " .. volume.pamixer_options,
			function(stdout, stderr, exitreason, exitcode)
				awesome.emit_signal("module::volume:update_read")
				if (callback ~= nil) then
					callback()
				end
			end
		)
	end,

	watch = function(timeout, callback, widget)
		awful.widget.watch(
			"pamixer --get-mute --get-volume " .. volume.pamixer_options,
			timeout, callback, widget
		)
	end,

	get = function(callback)
		local muted
		local value

		awful.spawn.easy_async(
			"pamixer --get-mute --get-volume " .. volume.pamixer_options,
			function(stdout, stderr, exitreason, exitcode)
				muted = string.match(stdout, "(%w%w%w%w%w?) ") -- "true" or "false"
				muted = (muted == "true")

				value = string.match(stdout, "(%d?%d?%d)") -- (\d?\d?\d)\%)

				if (value == nil) then
					value = false
				else
					value = tonumber(string.format("% 3d", value))
				end

				-- Value will be "false" if audio not connected,
				-- needs to be handled gracefully
				callback({
					mute = muted,
					value = value
				})
			end
		)
	end
}

awesome.connect_signal("module::volume:update_read",
	function()
		volume.commands.get(
			function(status)
				awesome.emit_signal(
					"module::volume:update",
					status
				)
			end
		)
	end
)

volume.volume_up = function(value)
	if volume.muted then
		volume.unmute()
	end

	volume.commands.up(value, function()
		core.sound.play("volume_up")
	end)
end

volume.volume_down = function(value)
	if volume.muted then
		volume.unmute()
	end

	volume.commands.down(value, function()
		core.sound.play("volume_down")
	end)
end

volume.mute = function()
	volume.muted = true
	volume.commands.mute()
end

volume.unmute = function()
	volume.muted = false
	volume.commands.unmute()
end

volume.toggle_mute = function()
	volume.commands.get(function(status)
		if status.mute then
			volume.unmute()
		else
			volume.mute()
		end
	end)
end


return volume