awesomewm/modules/backlight/util.lua

local backlight = {}

-- The space at the end is important!
local script = conf_dir .. "modules/backlight/backlight.fish"
script = script .. " "

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

backlight.exec_hooks = function()
	backlight.read(function(status)
		for i=1, #backlight.hooks do
			backlight.hooks[i](status)
		end
	end)
end

backlight.read = function(callback)
	awful.spawn.easy_async(
		script .. "get",
		function(stdout, stderr, exitreason, exitcode)
			callback(tonumber(stdout))
		end
	)
end

backlight.set = function(value)
awful.spawn(script .. "set " .. value, false)
end

backlight.watch = function(timeout, callback, widget)
	awful.widget.watch(
		script .. "get",
		timeout,
		callback,
		widget
	)
end


backlight.backlight_up = function()
	awful.spawn(script .. "up", false)
	backlight.exec_hooks()
end

backlight.backlight_down = function()
	awful.spawn(script .. "down", false)
	backlight.exec_hooks()
end

backlight.redshift = function(temp)
	awful.spawn("redshift -O " .. tostring(temp), false)
end

backlight.reset_redshift = function()
	awful.spawn("redshift -x", false)
end


return backlight