]> git.madduck.net Git - etc/awesome.git/blob - widgets/bat.lua

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

#199 #203 fix attempt 4
[etc/awesome.git] / widgets / bat.lua
1
2 --[[
3                                                                                                                         
4          Licensed under GNU General Public License v2 
5           * (c) 2013,      Luke Bonham                
6           * (c) 2010-2012, Peter Hofmann              
7                                                                                                                         
8 --]]
9
10 local newtimer     = require("lain.helpers").newtimer
11 local first_line   = require("lain.helpers").first_line
12
13 local naughty      = require("naughty")
14 local wibox        = require("wibox")
15
16 local math         = { floor  = math.floor, min = math.min }
17 local string       = { format = string.format }
18 local tonumber     = tonumber
19
20 local setmetatable = setmetatable
21
22 -- Battery infos
23 -- lain.widgets.bat
24
25 local function worker(args)
26     local bat       = {}
27     local args      = args or {}
28     local timeout   = args.timeout or 30
29     local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
30     local ac        = args.ac or "AC0"
31     local notify    = args.notify or "on"
32     local settings  = args.settings or function() end
33
34     bat.widget = wibox.widget.textbox('')
35
36     bat_notification_low_preset = {
37         title   = "Battery low",
38         text    = "Plug the cable!",
39         timeout = 15,
40         fg      = "#202020",
41         bg      = "#CDCDCD"
42     }
43
44     bat_notification_critical_preset = {
45         title   = "Battery exhausted",
46         text    = "Shutdown imminent",
47         timeout = 15,
48         fg      = "#000000",
49         bg      = "#FFFFFF"
50     }
51
52     bat_now = {
53         status    = "N/A",
54         ac_status = "N/A",
55         perc      = "N/A",
56         time      = "N/A",
57         watt      = "N/A"
58     }
59
60     bat_now.n_status = {}
61     for i = 1, #batteries do
62         bat_now.n_status[i] = "N/A"
63     end
64
65     function update()
66         local sum_rate_current      = 0
67         local sum_rate_voltage      = 0
68         local sum_rate_power        = 0
69         local sum_energy_now        = 0
70         local sum_energy_full       = 0
71         local sum_energy_percentage = 0
72         local pspath                = "/sys/class/power_supply/"
73   --      local pspath = "/home/luke/Download/"
74
75         for i, battery in ipairs(batteries) do
76             local bstr    = pspath .. battery
77             local present = first_line(bstr .. "/present")
78
79             if tonumber(present) == 1 then
80                 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
81                 local rate_current      = tonumber(first_line(bstr .. "/current_now"))
82                 local rate_voltage      = tonumber(first_line(bstr .. "/voltage_now"))
83                 local rate_power        = tonumber(first_line(bstr .. "/power_now"))
84
85                 -- energy_now(P)[uWh], charge_now(I)[uAh]
86                 local energy_now        = tonumber(first_line(bstr .. "/energy_now") or
87                                           first_line(bstr .. "/charge_now"))
88
89                 -- energy_full(P)[uWh], charge_full(I)[uAh]
90                 local energy_full       = tonumber(first_line(bstr .. "/energy_full") or
91                                           first_line(bstr .. "/charge_full"))
92
93                 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
94                                           math.floor((energy_now / energy_full) * 100)
95
96                 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
97
98                 sum_rate_current      = sum_rate_current + (rate_current or 0)
99                 sum_rate_voltage      = sum_rate_voltage + rate_voltage
100                 sum_rate_power        = sum_rate_power + (rate_power or ((rate_voltage * rate_current) / 1e6))
101                 sum_energy_now        = sum_energy_now + (energy_now or 0)
102                 sum_energy_full       = sum_energy_full + energy_full
103                 sum_energy_percentage = sum_energy_percentage + energy_percentage
104             end
105         end
106
107         bat_now.status = bat_now.n_status[1]
108         bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
109
110         if bat_now.status ~= "N/A" then
111             -- update {perc,time,watt} iff battery not full and rate > 0
112             if bat_now.status ~= "Full" and (sum_rate_current > 0 or sum_rate_power > 0) then
113                 local rate_time = 0
114                 local sum_rpc   = sum_rate_power or sum_rate_current
115                 if sum_rpc >= 1e8 then sum_rpc = sum_rpc / 10 end
116
117                 if bat_now.status == "Charging" then
118                     rate_time = (sum_energy_full - sum_energy_now) / sum_rpc
119                 elseif bat_now.status == "Discharging" then
120                     rate_time = sum_energy_now / sum_rpc
121                 end
122
123                 local hours   = math.floor(rate_time)
124                 local minutes = math.floor((rate_time - hours) * 60)
125                 bat_now.perc  = tonumber(string.format("%d", math.min(100, sum_energy_percentage / #batteries)))
126                 bat_now.time  = string.format("%02d:%02d", hours, minutes)
127                 bat_now.watt  = tonumber(string.format("%.2f", sum_rate_power / 1e6))
128             elseif bat_now.status == "Full" then
129                 bat_now.perc  = 100
130                 bat_now.time  = "00:00"
131                 bat_now.watt  = 0
132             end
133         end
134
135         widget = bat.widget
136         settings()
137
138         -- notifications for low and critical states
139         if notify == "on" and bat_now.perc and bat_now.status == "Discharging" then
140             if bat_now.perc <= 5 then
141                 bat.id = naughty.notify({
142                     preset = bat_notification_critical_preset,
143                     replaces_id = bat.id
144                 }).id
145             elseif bat_now.perc <= 15 then
146                 bat.id = naughty.notify({
147                     preset = bat_notification_low_preset,
148                     replaces_id = bat.id
149                 }).id
150             end
151         end
152     end
153
154     newtimer(battery, timeout, update)
155
156     return setmetatable(bat, { __index = bat.widget })
157 end
158
159 return setmetatable({}, { __call = function(_, ...) return worker(...) end })