awesomewm/modules/volume/util.lua

local volume = {}
volume.commands = {}


-- 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

function volume.commands:up()
	awful.spawn("pamixer --increase 5" .. volume.pamixer_options, false)
end

function volume.commands:down()
	awful.spawn("pamixer --decrease 5" .. volume.pamixer_options, false)
end

function volume.commands:set(value)
	awful.spawn("pamixer --set_volume" .. tostring(value) .. " " .. volume.pamixer_options, false)
end

function volume.commands:mute()
	awful.spawn("pamixer --mute" .. volume.pamixer_options, false)
end

function volume.commands:unmute()
	awful.spawn("pamixer --unmute" .. volume.pamixer_options, false)
end

function volume.commands:get(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

			callback({
				mute = muted,
				value = value
			})
		end
	)
end

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



volume.hooks = {}
volume.add_hook = function(callback)
	volume.hooks[#volume.hooks + 1] = callback
end

volume.exec_hooks = function()
	volume.commands:get(function(status)
		for i=1, #volume.hooks do
			volume.hooks[i](status)
		end
	end)
end

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

	volume.commands:up()
	core.sound.play("volume_up")

	volume.exec_hooks()
end

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

	volume.commands:down()
	core.sound.play("volume_down")

	volume.exec_hooks()
end

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

	volume.exec_hooks()
end

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

	volume.exec_hooks()
end

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


return volume