bat: widget rewritten for sysfs

This also means that it replaces batsys, and we are left with only
one, universal, battery widget.

README

@@ -165,15 +165,6 @@ vicious.widgets.uptime
 
 vicious.widgets.bat
   - provides state, charge, and remaining time for a requested battery
-    using procfs
-  - takes battery ID as an argument, i.e. "BAT0"
-  - returns 1st value as state of requested battery, 2nd as charge
-    level in percent and 3rd as remaining (charging or discharging)
-    time
-
-vicious.widgets.batsys
-  - provides state, charge, and remaining time for a requested battery
-    using sysfs
   - takes battery ID as an argument, i.e. "BAT0"
   - returns 1st value as state of requested battery, 2nd as charge
     level in percent and 3rd as remaining (charging or discharging)

bat.lua

@@ -5,67 +5,64 @@
 
 -- {{{ Grab environment
 local tonumber = tonumber
-local io = { open = io.open }
 local setmetatable = setmetatable
+local string = { format = string.format }
+local helpers = require("vicious.helpers")
 local math = {
     min = math.min,
     floor = math.floor
 }
-local string = {
-    find = string.find,
-    match = string.match,
-    format = string.format
-}
 -- }}}
 
 
--- Bat: provides state, charge, and remaining time for a requested battery using procfs
+-- Batsys: provides state, charge, and remaining time for a requested battery
 module("vicious.bat")
 
 
 -- {{{ Battery widget type
 local function worker(format, batid)
+    local battery = setmetatable(
+        { _path = "/sys/class/power_supply/" .. batid },
+        helpers.pathtotable
+    )
+
     local battery_state = {
-        ["full"] = "↯",
-        ["unknown"] = "⌁",
-        ["charged"] = "↯",
-        ["charging"] = "+",
-        ["discharging"] = "-"
+        ["Full\n"] = "↯",
+        ["Unknown\n"] = "⌁",
+        ["Charged\n"] = "↯",
+        ["Charging\n"] = "+",
+        ["Discharging\n"] = "-"
     }
 
-    -- Get /proc/acpi/battery info
-    local f = io.open("/proc/acpi/battery/"..batid.."/info")
-    -- Handler for incompetent users
-    if not f then return {battery_state["unknown"], 0, "N/A"} end
-    local infofile = f:read("*all")
-    f:close()
-
     -- Check if the battery is present
-    if infofile == nil or string.find(infofile, "present:[%s]+no") then
-        return {battery_state["unknown"], 0, "N/A"}
+    if not battery.present == "1\n" then
+        return {battery_state["Unknown\n"], 0, "N/A"}
     end
 
-    -- Get capacity information
-    local capacity = string.match(infofile, "last full capacity:[%s]+([%d]+).*")
-
-
-    -- Get /proc/acpi/battery state
-    local f = io.open("/proc/acpi/battery/"..batid.."/state")
-    local statefile = f:read("*all")
-    f:close()
 
     -- Get state information
-    local state = string.match(statefile, "charging state:[%s]+([%a]+).*")
-    local state = battery_state[state] or battery_state["unknown"]
-
-    -- Get charge information
-    local rate = string.match(statefile, "present rate:[%s]+([%d]+).*")
-    local remaining = string.match(statefile, "remaining capacity:[%s]+([%d]+).*")
+    local state = battery_state[battery.status] or battery_state["Unknown\n"]
 
+    -- Get capacity information
+    if battery.charge_now then
+        remaining, capacity = battery.charge_now, battery.charge_full
+    elseif battery.energy_now then
+        remaining, capacity = battery.energy_now, battery.energy_full
+    else
+        return {battery_state["Unknown\n"], 0, "N/A"}
+    end
 
     -- Calculate percentage (but work around broken BAT/ACPI implementations)
     local percent = math.min(math.floor(remaining / capacity * 100), 100)
 
+
+    -- Get charge information
+    if battery.current_now then
+        rate = battery.current_now
+    else -- Todo: other rate sources, as with capacity?
+        return {state, percent, "N/A"}
+    end
+
     -- Calculate remaining (charging or discharging) time
     if state == "+" then
         timeleft = (tonumber(capacity) - tonumber(remaining)) / tonumber(rate)

batsys.lua

@@ -1,87 +0,0 @@
----------------------------------------------------
--- Licensed under the GNU General Public License v2
---  * (c) 2009, Adrian C. <anrxc@sysphere.org>
---  * (c) 2009, Benedikt Sauer <filmor@gmail.com>
----------------------------------------------------
-
--- {{{ Grab environment
-local tonumber = tonumber
-local io = { open = io.open }
-local setmetatable = setmetatable
-local string = { format = string.format }
-local math = {
-    min = math.min,
-    floor = math.floor
-}
--- }}}
-
-
--- Batsys: provides state, charge, and remaining time for a requested battery using sysfs
-module("vicious.batsys")
-
-
--- {{{ Battery widget type
-local function worker(format, batid)
-    local battery = setmetatable({}, {__index = function(table, name)
-        local f = io.open("/sys/class/power_supply/"..batid.."/"..name)
-        if f then
-            local s = f:read("*all")
-            f:close()
-            return s
-        end
-    end})
-
-    local battery_state = {
-        ["Full\n"] = "↯",
-        ["Unknown\n"] = "⌁",
-        ["Charged\n"] = "↯",
-        ["Charging\n"] = "+",
-        ["Discharging\n"] = "-"
-    }
-
-    -- Check if the battery is present
-    if not battery.present == "1\n" then
-        return {battery_state["Unknown\n"], 0, "N/A"}
-    end
-
-
-    -- Get state information
-    local state = battery_state[battery.status] or battery_state["Unknown\n"]
-
-    -- Get capacity information
-    if battery.charge_now then
-        remaining, capacity = battery.charge_now, battery.charge_full
-    elseif battery.energy_now then
-        remaining, capacity = battery.energy_now, battery.energy_full
-    else
-        return {battery_state["Unknown\n"], 0, "N/A"}
-    end
-
-    -- Calculate percentage (but work around broken BAT/ACPI implementations)
-    local percent = math.min(math.floor(remaining / capacity * 100), 100)
-
-
-    -- Get charge information
-    if battery.current_now then
-        rate = battery.current_now
-    else -- Todo: other rate sources, as with capacity?
-        return {state, percent, "N/A"}
-    end
-
-    -- Calculate remaining (charging or discharging) time
-    if state == "+" then
-        timeleft = (tonumber(capacity) - tonumber(remaining)) / tonumber(rate)
-    elseif state == "-" then
-        timeleft = tonumber(remaining) / tonumber(rate)
-    else
-        return {state, percent, "N/A"}
-    end
-    local hoursleft = math.floor(timeleft)
-    local minutesleft = math.floor((timeleft - hoursleft) * 60 )
-    local time = string.format("%02d:%02d", hoursleft, minutesleft)
-
-    return {state, percent, time}
-end
--- }}}
-
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })

init.lua

@@ -28,7 +28,6 @@ require("vicious.thermal")
 require("vicious.load")
 require("vicious.uptime")
 require("vicious.bat")
-require("vicious.batsys")
 require("vicious.mem")
 require("vicious.fs")
 require("vicious.dio")