]> 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:

Merge pull request #256 from wimstefan/master
[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 helpers      = require("lain.helpers")
11 local first_line   = require("lain.helpers").first_line
12
13 local naughty      = require("naughty")
14 local wibox        = require("wibox")
15
16 local math         = { abs    = math.abs,
17                        floor  = math.floor,
18                        log10  = math.log10,
19                        min    = math.min }
20 local string       = { format = string.format }
21
22 local type         = type
23 local tonumber     = tonumber
24 local setmetatable = setmetatable
25
26 -- Battery infos
27 -- lain.widgets.bat
28
29 local function worker(args)
30     local bat       = helpers.make_widget_textbox()
31     local args      = args or {}
32     local timeout   = args.timeout or 30
33     local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
34     local ac        = args.ac or "AC0"
35     local notify    = args.notify or "on"
36     local settings  = args.settings or function() end
37
38     bat_notification_low_preset = {
39         title   = "Battery low",
40         text    = "Plug the cable!",
41         timeout = 15,
42         fg      = "#202020",
43         bg      = "#CDCDCD"
44     }
45
46     bat_notification_critical_preset = {
47         title   = "Battery exhausted",
48         text    = "Shutdown imminent",
49         timeout = 15,
50         fg      = "#000000",
51         bg      = "#FFFFFF"
52     }
53
54     bat_now = {
55         status    = "N/A",
56         ac_status = "N/A",
57         perc      = "N/A",
58         time      = "N/A",
59         watt      = "N/A"
60     }
61
62     bat_now.n_status = {}
63     bat_now.n_perc   = {}
64     for i = 1, #batteries do
65         bat_now.n_status[i] = "N/A"
66         bat_now.n_perc[i] = 0
67     end
68
69     function bat.update()
70         local sum_rate_current = 0
71         local sum_rate_voltage = 0
72         local sum_rate_power   = 0
73         local sum_rate_energy  = 0
74         local sum_energy_now   = 0
75         local sum_energy_full  = 0
76         local pspath           = "/sys/class/power_supply/"
77
78         for i, battery in ipairs(batteries) do
79             local bstr    = pspath .. battery
80             local present = first_line(bstr .. "/present")
81
82             if tonumber(present) == 1 then
83                 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
84                 local rate_current = tonumber(first_line(bstr .. "/current_now"))
85                 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
86                 local rate_power   = tonumber(first_line(bstr .. "/power_now"))
87
88                 -- energy_now(P)[uWh], charge_now(I)[uAh]
89                 local energy_now        = tonumber(first_line(bstr .. "/energy_now") or
90                                           first_line(bstr .. "/charge_now"))
91
92                 -- energy_full(P)[uWh], charge_full(I)[uAh]
93                 local energy_full       = tonumber(first_line(bstr .. "/energy_full") or
94                                           first_line(bstr .. "/charge_full"))
95
96                 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
97                                           math.floor((energy_now / energy_full) * 100)
98
99                 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
100                 bat_now.n_perc[i]   = energy_percentage or bat_now.n_perc[i]
101
102                 sum_rate_current = sum_rate_current + (rate_current or 0)
103                 sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0)
104                 sum_rate_power   = sum_rate_power + (rate_power or 0)
105                 sum_rate_energy  = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6))
106                 sum_energy_now   = sum_energy_now + (energy_now or 0)
107                 sum_energy_full  = sum_energy_full + (energy_full or 0)
108             end
109         end
110
111         bat_now.status = bat_now.n_status[1]
112         bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
113
114         if bat_now.status ~= "N/A" then
115             -- update {perc,time,watt} iff battery not full and rate > 0
116             if bat_now.status ~= "Full" and (sum_rate_power > 0 or sum_rate_current > 0) then
117                 local rate_time = 0
118                 local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current
119
120                 if bat_now.status == "Charging" then
121                     rate_time = (sum_energy_full - sum_energy_now) / div
122                 else -- Discharging
123                     rate_time = sum_energy_now / div
124                 end
125
126                 if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199)
127                     rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
128                     rate_time = rate_time * 10^(rate_time_magnitude - 2)
129                 end
130
131                 local hours   = math.floor(rate_time)
132                 local minutes = math.floor((rate_time - hours) * 60)
133                 bat_now.perc  = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
134                 bat_now.time  = string.format("%02d:%02d", hours, minutes)
135                 bat_now.watt  = tonumber(string.format("%.2f", sum_rate_energy / 1e6))
136             elseif bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then
137                                                                 bat_now.perc  = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
138                                                                 bat_now.time  = "00:00"
139                                                                 bat_now.watt  = 0
140             elseif bat_now.status == "Full" then
141                 bat_now.perc  = 100
142                 bat_now.time  = "00:00"
143                 bat_now.watt  = 0
144             end
145         end
146
147         widget = bat.widget
148         settings()
149
150         -- notifications for low and critical states
151         if notify == "on" and type(bat_now.perc) == "number" and bat_now.status == "Discharging" then
152             if bat_now.perc <= 5 then
153                 bat.id = naughty.notify({
154                     preset = bat_notification_critical_preset,
155                     replaces_id = bat.id
156                 }).id
157             elseif bat_now.perc <= 15 then
158                 bat.id = naughty.notify({
159                     preset = bat_notification_low_preset,
160                     replaces_id = bat.id
161                 }).id
162             end
163         end
164     end
165
166     helpers.newtimer(battery, timeout, bat.update)
167
168     return bat
169 end
170
171 return setmetatable({}, { __call = function(_, ...) return worker(...) end })