awesomewm/modules/battery/widget.lua

local battery = req_rel(..., "util")
local widget = {}
local dotgrid = require("widgets.dotgrid")

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

widget.warninglog = {}

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


widget.dots = dotgrid:new();
widget.dots.on_color = {1, 0, 0}
widget.dots.off_color = {0.5, 0, 0}
widget.dots.spacing = beautiful.dpi(2)

widget.widget = wibox.widget {
	{
		widget.dots,
		top = beautiful.dpi(2),
		bottom = beautiful.dpi(2),
		left = beautiful.dpi(2),
		right = beautiful.dpi(2),
		layout = wibox.container.margin,
	},
	layout = wibox.container.background,
}


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

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

widget.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, #widget.warnings do
			v = widget.warnings[i]
			if (batpec <= v) and (not widget.warninglog[i]) then
				widget.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, #widget.warnings do
			if (batpec >= widget.warnings[i]) then
				widget.warninglog[i] = false
			end
		end
	end

	widget.dots.value = batpec

	if discharging then
		widget.dots.on_color = {1, 0, 0}
		widget.dots.off_color = {0.5, 0, 0}
	else
		widget.dots.on_color = {1, 1, 0}
		widget.dots.off_color = {0.5, 0.5, 0}
	end

	widget.dots:emit_signal("widget::redraw_needed")
end

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


widget.widget:connect_signal("button::press",
	function(_, _, _, button, mods)
		if (button == 1) then
			battery.status(
				function(stdout, stderr, exitreason, exitcode)
					local batpec = string.match(stdout, "(%d?%d?%d)%%")
					batpec = tonumber(string.format("% 3d", batpec))

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

					debug_message(batpec)

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

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

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

battery.watch(
	2,
	function(_, stdout)
		widget.update(stdout)
	end,
	widget.widget
)

return widget