]> 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:

util.mc: check if client is still valid before setting geometry
[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         = { 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       = {}
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.widget = wibox.widget.textbox('')
39
40     bat_notification_low_preset = {
41         title   = "Battery low",
42         text    = "Plug the cable!",
43         timeout = 15,
44         fg      = "#202020",
45         bg      = "#CDCDCD"
46     }
47
48     bat_notification_critical_preset = {
49         title   = "Battery exhausted",
50         text    = "Shutdown imminent",
51         timeout = 15,
52         fg      = "#000000",
53         bg      = "#FFFFFF"
54     }
55
56     bat_now = {
57         status    = "N/A",
58         ac_status = "N/A",
59         perc      = "N/A",
60         time      = "N/A",
61         watt      = "N/A"
62     }
63
64     bat_now.n_status = {}
65     bat_now.n_perc   = {}
66     for i = 1, #batteries do
67         bat_now.n_status[i] = "N/A"
68         bat_now.n_perc[i] = 0
69     end
70
71     function bat.update()
72         local sum_rate_current = 0
73         local sum_rate_voltage = 0
74         local sum_rate_power   = 0
75         local sum_rate_energy  = 0
76         local sum_energy_now   = 0
77         local sum_energy_full  = 0
78         local pspath           = "/sys/class/power_supply/"
79
80         for i, battery in ipairs(batteries) do
81             local bstr    = pspath .. battery
82             local present = first_line(bstr .. "/present")
83
84             if tonumber(present) == 1 then
85                 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
86                 local rate_current = tonumber(first_line(bstr .. "/current_now"))
87                 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
88                 local rate_power   = tonumber(first_line(bstr .. "/power_now"))
89
90                 -- energy_now(P)[uWh], charge_now(I)[uAh]
91                 local energy_now        = tonumber(first_line(bstr .. "/energy_now") or
92                                           first_line(bstr .. "/charge_now"))
93
94                 -- energy_full(P)[uWh], charge_full(I)[uAh]
95                 local energy_full       = tonumber(first_line(bstr .. "/energy_full") or
96                                           first_line(bstr .. "/charge_full"))
97
98                 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
99                                           math.floor((energy_now / energy_full) * 100)
100
101                 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
102                 bat_now.n_perc[i]   = energy_percentage or bat_now.n_perc[i]
103
104                 sum_rate_current = sum_rate_current + (rate_current or 0)
105                 sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0)
106                 sum_rate_power   = sum_rate_power + (rate_power or 0)
107                 sum_rate_energy  = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6))
108                 sum_energy_now   = sum_energy_now + (energy_now or 0)
109                 sum_energy_full  = sum_energy_full + (energy_full or 0)
110             end
111         end
112
113         bat_now.status = bat_now.n_status[1]
114         bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
115
116         if bat_now.status ~= "N/A" then
117             -- update {perc,time,watt} iff battery not full and rate > 0
118             if bat_now.status ~= "Full" and (sum_rate_power > 0 or sum_rate_current > 0) then
119                 local rate_time = 0
120                 local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current
121
122                 if bat_now.status == "Charging" then
123                     rate_time = (sum_energy_full - sum_energy_now) / div
124                 else -- Discharging
125                     rate_time = sum_energy_now / div
126                 end
127
128                 if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199)
129                     rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
130                     rate_time = rate_time * 10^(rate_time_magnitude - 2)
131                 end
132
133                 local hours   = math.floor(rate_time)
134                 local minutes = math.floor((rate_time - hours) * 60)
135                 bat_now.perc  = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
136                 bat_now.time  = string.format("%02d:%02d", hours, minutes)
137                 bat_now.watt  = tonumber(string.format("%.2f", sum_rate_energy / 1e6))
138             elseif bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then
139                                                                 bat_now.perc  = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
140                                                                 bat_now.time  = "00:00"
141                                                                 bat_now.watt  = 0
142             elseif bat_now.status == "Full" then
143                 bat_now.perc  = 100
144                 bat_now.time  = "00:00"
145                 bat_now.watt  = 0
146             end
147         end
148
149         widget = bat.widget
150         settings()
151
152         -- notifications for low and critical states
153         if notify == "on" and type(bat_now.perc) == "number" and bat_now.status == "Discharging" then
154             if bat_now.perc <= 5 then
155                 bat.id = naughty.notify({
156                     preset = bat_notification_critical_preset,
157                     replaces_id = bat.id
158                 }).id
159             elseif bat_now.perc <= 15 then
160                 bat.id = naughty.notify({
161                     preset = bat_notification_low_preset,
162                     replaces_id = bat.id
163                 }).id
164             end
165         end
166     end
167
168     newtimer(battery, timeout, bat.update)
169
170     return setmetatable(bat, { __index = bat.widget })
171 end
172
173 return setmetatable({}, { __call = function(_, ...) return worker(...) end })