From 22d656903563f75678f3634964731ccf93355dfd Mon Sep 17 00:00:00 2001
From: ache <ache@ache.one>
Date: Mon, 13 Mar 2017 23:17:19 +0100
Subject: Init commit

---
 lain/widgets/bat.lua | 149 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 lain/widgets/bat.lua

(limited to 'lain/widgets/bat.lua')

diff --git a/lain/widgets/bat.lua b/lain/widgets/bat.lua
new file mode 100644
index 0000000..572d099
--- /dev/null
+++ b/lain/widgets/bat.lua
@@ -0,0 +1,149 @@
+
+--[[
+                                                  
+     Licensed under GNU General Public License v2 
+      * (c) 2013,      Luke Bonham                
+      * (c) 2010-2012, Peter Hofmann              
+                                                  
+--]]
+
+local newtimer     = require("lain.helpers").newtimer
+local first_line   = require("lain.helpers").first_line
+
+local naughty      = require("naughty")
+local wibox        = require("wibox")
+
+local math         = { floor  = math.floor }
+local string       = { format = string.format }
+local tonumber     = tonumber
+
+local setmetatable = setmetatable
+
+-- Battery infos
+-- lain.widgets.bat
+local bat = {}
+
+local function worker(args)
+    local args = args or {}
+    local timeout = args.timeout or 30
+    local battery = args.battery or "BAT0"
+    local notify = args.notify or "on"
+    local settings = args.settings or function() end
+
+    bat.widget = wibox.widget.textbox('')
+
+    bat_notification_low_preset = {
+        title = "Battery low",
+        text = "Plug the cable!",
+        timeout = 15,
+        fg = "#202020",
+        bg = "#CDCDCD"
+    }
+
+    bat_notification_critical_preset = {
+        title = "Battery exhausted",
+        text = "Shutdown imminent",
+        timeout = 15,
+        fg = "#000000",
+        bg = "#FFFFFF"
+    }
+
+    function update()
+        bat_now = {
+            status = "Not present",
+            perc   = "N/A",
+            time   = "N/A",
+            watt   = "N/A"
+        }
+
+        local bstr  = "/sys/class/power_supply/" .. battery
+
+        local present = first_line(bstr .. "/present")
+
+        if present == "1"
+        then
+            local rate  = first_line(bstr .. "/power_now") or
+                          first_line(bstr .. "/current_now")
+
+            local ratev = first_line(bstr .. "/voltage_now")
+
+            local rem   = first_line(bstr .. "/energy_now") or
+                          first_line(bstr .. "/charge_now")
+
+            local tot   = first_line(bstr .. "/energy_full") or
+                          first_line(bstr .. "/charge_full")
+
+            bat_now.status = first_line(bstr .. "/status") or "N/A"
+
+            rate  = tonumber(rate) or 1
+            ratev = tonumber(ratev)
+            rem   = tonumber(rem)
+            tot   = tonumber(tot)
+
+            local time_rat = 0
+            if bat_now.status == "Charging"
+            then
+                time_rat = (tot - rem) / rate
+            elseif bat_now.status == "Discharging"
+            then
+                time_rat = rem / rate
+            end
+
+            local hrs = math.floor(time_rat)
+            if hrs < 0 then hrs = 0 elseif hrs > 23 then hrs = 23 end
+
+            local min = math.floor((time_rat - hrs) * 60)
+            if min < 0 then min = 0 elseif min > 59 then min = 59 end
+
+            bat_now.time = string.format("%02d:%02d", hrs, min)
+
+            bat_now.perc = first_line(bstr .. "/capacity")
+
+            if not bat_now.perc then
+                local perc = (rem / tot) * 100
+                if perc <= 100 then
+                    bat_now.perc = string.format("%d", perc)
+                elseif perc > 100 then
+                    bat_now.perc = "100"
+                elseif perc < 0 then
+                    bat_now.perc = "0"
+                end
+            end
+
+            if rate ~= nil and ratev ~= nil then
+                bat_now.watt = string.format("%.2fW", (rate * ratev) / 1e12)
+            else
+                bat_now.watt = "N/A"
+            end
+
+        end
+
+        widget = bat.widget
+        settings()
+
+        -- notifications for low and critical states
+        if bat_now.status == "Discharging" and notify == "on" and bat_now.perc ~= nil
+        then
+            local nperc = tonumber(bat_now.perc) or 100
+            if nperc <= 5
+            then
+                bat.id = naughty.notify({
+                    preset = bat_notification_critical_preset,
+                    replaces_id = bat.id,
+                }).id
+            elseif nperc <= 15
+            then
+                bat.id = naughty.notify({
+                    preset = bat_notification_low_preset,
+                    replaces_id = bat.id,
+                }).id
+            end
+        end
+    end
+
+    newtimer("bat", timeout, update)
+
+    return bat.widget
+end
+
+return setmetatable(bat, { __call = function(_, ...) return worker(...) end })
-- 
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