awesomewm/desktop/widgets/battery.lua

local battery = {}

-- Percentages to warn at
-- (must be in order least -> greatest)
battery.warnings = {
	5, 10, 25, 50
}

battery.warninglog = {}

for i=1, #battery.warnings do
	battery.warninglog[i] = false
end

battery.image_path = beautiful.icons.battery.missing
battery.icon = wibox.widget {
	image = beautiful.icons.battery.missing,
	resize = true,
	widget = wibox.widget.imagebox,
}


battery.progressbar = wibox.widget {
	max_value = 100,
	widget = wibox.widget.progressbar,
	paddings = beautiful.dpi(2),
	color = beautiful.color.bar.active,
	background_color = beautiful.color.transparent,
	border_color = beautiful.color.bar.active,
	border_width = beautiful.dpi(1),
	margins = beautiful.dpi(3)
}

battery.arc = wibox.widget {
	{
		battery.icon,
		top = beautiful.dpi(1),
		bottom = beautiful.dpi(1),
		layout = wibox.container.margin,
	},
	max_value = 100,
	thickness = beautiful.dpi(4),
	start_angle = 4.71238898, -- 2pi*3/4
	--forced_height = beautiful.dpi(16),
	--forced_width = beautiful.dpi(16),
	colors = {"#27D4CC", "#00446B"},
	bg = "#FFFFFF30",
	paddings = beautiful.dpi(2),
	widget = wibox.container.arcchart
}


battery.rotator = wibox.widget {
	battery.progressbar,
	forced_width = beautiful.dpi(15),
	direction = "east",
	layout = wibox.container.rotate,
}


battery.widget = wibox.widget {
	{
		{   -- Right space
			widget = wibox.widget.separator,
			color = beautiful.color.transparent,
			forced_width = beautiful.dpi(3)
		},
		{
			battery.arc,
			top = beautiful.dpi(2),
			bottom = beautiful.dpi(2),
			layout = wibox.container.margin,
		},
		{   -- Left space
			widget = wibox.widget.separator,
			color = beautiful.color.transparent,
			forced_width = beautiful.dpi(3)
		},

		layout = wibox.layout.align.horizontal,
	},
	layout = wibox.container.background,
}

battery.widget:connect_signal("mouse::enter", function(result)
	battery.widget.bg = beautiful.color.bar.hover_bg
end)

battery.widget:connect_signal("mouse::leave", function(result)
	battery.widget.bg = beautiful.color.transparent
end)

battery.update = function(stdout)
	local batpec = string.match(stdout, "(%d?%d?%d)%%")
	batpec = tonumber(string.format("% 3d", batpec))

	local discharging = string.match(stdout, "discharging") or false

	-- Handle low power notifications
	if discharging then
		for i=1, #battery.warnings do
			v = battery.warnings[i]
			if (batpec <= v) and (not battery.warninglog[i]) then
				battery.warninglog[i] = true

				naughty.notify({
					title = "Low power",
					text = "Battery is at " .. tostring(batpec) .. "%",
					icon = beautiful.icons.battery.caution,

					timeout = 5,
					ignore_suspend = true,

					border_color = beautiful.color.battery.danger,
					preset = beautiful.notification_templates.bottom_right
				})
				break
			end
		end
	else
		for i=1, #battery.warnings do
			if (batpec >= battery.warnings[i]) then
				battery.warninglog[i] = false
			end
		end
	end


	battery.progressbar.value = batpec
	battery.arc.value = batpec

	if batpec > 60 then
		battery.progressbar.color = beautiful.color.battery.good
	elseif batpec > 40 then
		battery.progressbar.color = beautiful.color.battery.low
	elseif batpec <= 40 then
		battery.progressbar.color = beautiful.color.battery.danger
	end


	battery.image_path = beautiful.icons.battery.missing
	-- Set current battery icon
	if (not discharging) then
		if batpec > 80 then battery.image_path = beautiful.icons.battery.charging.full
		elseif batpec > 60 then battery.image_path = beautiful.icons.battery.charging.good
		elseif batpec > 40 then battery.image_path = beautiful.icons.battery.charging.low
		elseif batpec > 20 then battery.image_path = beautiful.icons.battery.charging.caution
		elseif batpec <= 20 then battery.image_path = beautiful.icons.battery.charging.empty end
	else
		if batpec > 80 then battery.image_path = beautiful.icons.battery.full
		elseif batpec > 60 then battery.image_path = beautiful.icons.battery.good
		elseif batpec > 40 then battery.image_path = beautiful.icons.battery.low
		elseif batpec > 20 then battery.image_path = beautiful.icons.battery.caution
		elseif batpec <= 20 then battery.image_path = beautiful.icons.battery.empty end
	end
	battery.icon.image = battery.image_path

	if (not discharging) and (batpec > 90) then
		battery.progressbar.border_color = beautiful.color.battery.good
	elseif (discharging) and (batpec <= 25) then
		battery.progressbar.border_color = beautiful.color.battery.danger
	else
		battery.progressbar.border_color = beautiful.color.bar.active
	end

	if discharging then
		battery.rotator.direction = "east"
	else
		battery.rotator.direction = "west"
	end
end

battery.readupdate = function()
	bin.battery.status(
		function(stdout, stderr, exitreason, exitcode)
			battery.update(stdout)
		end
	)
end


battery.widget:connect_signal("button::press",
	function(_, _, _, button, mods)
		if (button == 1) then
			bin.battery.status(
				function(stdout, stderr, exitreason, exitcode)
					local batpec = string.match(stdout, "(%d?%d?%d)%%") -- (\d?\d?\d)\%)
					local batstat = string.match(stdout, "discharging") or false

					if batstat then
						batstat = "Discharging, "
					else
						batstat = "Charging, "
					end

					local out = naughty.notify({
						title = "Battery:",
						text = batstat .. batpec .. "%",
						icon = battery.image_path,
						replaces_id = battery.notid,
						ignore_suspend = true,

						preset = beautiful.notification_templates.bottom_right
					})
					battery.notid = out.id
				end
			)
		end
	end
)

bin.battery.watch(10, function(_, stdout) battery.update(stdout) end, battery.widget)

return battery.widget