From 3a7bb799950d6f95118ae341b4c39ac705b21c3a Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Sat, 17 Dec 2016 17:58:23 +0100
Subject: multi battery widget

---
 config/awesome/battery.lua | 79 ++++++++++++++++++++++++++--------------------
 config/awesome/rc.lua      |  3 +-
 2 files changed, 45 insertions(+), 37 deletions(-)

diff --git a/config/awesome/battery.lua b/config/awesome/battery.lua
index a76ce29..100d77b 100644
--- a/config/awesome/battery.lua
+++ b/config/awesome/battery.lua
@@ -1,71 +1,80 @@
 local naughty = require("naughty")
 local beautiful = require("beautiful")
 
-function batteryInfoUpdate(adapter, warn, widget)
+function batteryInfoUpdate(adapters, widget)
     spacer = " "
-    local fcap = io.open("/sys/class/power_supply/"..adapter.."/capacity")
-    local fsta = io.open("/sys/class/power_supply/"..adapter.."/status")
-    local cap = fcap:read()
-    local sta = fsta:read()
-    fcap:close()
-    fsta:close()
-
-    if sta:match("Charging") then
-        icon = "▴"
-    elseif sta:match("Discharging") then
-        icon =  "▾"
-    else
-        icon =  "‐"
+
+    local total_cur = 0.0
+    local total_max = 0.0
+    local status = ''
+
+    for i = 1, #adapters do
+        local fcap = io.open("/sys/class/power_supply/"..adapters[i].."/capacity")
+        local fsta = io.open("/sys/class/power_supply/"..adapters[i].."/status")
+        local cap = fcap:read()
+        local sta = fsta:read()
+        fcap:close()
+        fsta:close()
+
+        if sta:match("Charging") then
+            icon = "▴"
+        elseif sta:match("Discharging") then
+            icon =  "▾"
+        else
+            icon =  "‐"
+        end
+
+        status = status .. cap..'%'..icon
+        if i < #adapters then
+            status = status ..','
+        end
+        total_cur = total_cur + tonumber(cap)
+        total_max = total_max + 1.0
     end
 
-    if tonumber(cap) < 10 and warn then
+    local cap = total_cur/total_max
+
+    if cap < 10 then
         local bg = beautiful.bg_focus
         local fg = beautiful.fg_focus
-        if tonumber(cap) <= 5 then
+        if cap <= 5 then
            bg = beautiful.bg_urgent
            fg = beautiful.fg_urgent
         end
 
         naughty.notify({ title      = "Battery Warning",
-                         text       = "Battery "..adapter.." low at "..cap.."%!",
+                         text       = "Battery low at "..cap.."%!",
                          timeout    = 15,
                          position   = "top_right",
                          fg         = fg,
                          bg         = bg
                        })
     end
+
     local color=nil
-    if warn then
-       if tonumber(cap) < 10 then
-           color='red'
-       elseif tonumber(cap) < 20 then
-           color='orange'
-       end
+    if tonumber(cap) < 10 then
+        color='red'
+    elseif tonumber(cap) < 20 then
+        color='orange'
     end
 
-    local s = cap..'%'..icon
     if color then
-        s = "<span color='"..color.."'>"..s..'</span>'
+        status = "<span color='"..color.."'>"..status..'</span>'
     end
 
-    widget:set_markup(spacer..s..spacer)
+    widget:set_markup(spacer..status..spacer)
 end
 
 local wibox = require("wibox")
 
-bat0_widget = wibox.widget.textbox()
-bat0_widget:set_align("right")
-
-bat1_widget = wibox.widget.textbox()
-bat1_widget:set_align("right")
+battery_widget = wibox.widget.textbox()
+battery_widget:set_align("right")
 
-batteryInfoUpdate("BAT0", true, bat0_widget)
-batteryInfoUpdate("BAT1", false, bat1_widget)
+batteryInfoUpdate( {"BAT0", "BAT1"}, battery_widget)
 
 battery_timer = timer({timeout = 20})
 battery_timer:connect_signal("timeout", function()
-   batteryInfoUpdate("BAT0", true, bat0_widget)
-   batteryInfoUpdate("BAT1", false, bat1_widget)
+   batteryInfoUpdate( {"BAT0", "BAT1"}, battery_widget)
 end)
 battery_timer:start()
 
diff --git a/config/awesome/rc.lua b/config/awesome/rc.lua
index dfbc563..f02c679 100644
--- a/config/awesome/rc.lua
+++ b/config/awesome/rc.lua
@@ -206,8 +206,7 @@ for s = 1, screen.count() do
     -- Widgets that are aligned to the right
     local right_layout = wibox.layout.fixed.horizontal()
     if s == 1 then right_layout:add(wibox.widget.systray()) end
-    right_layout:add(bat0_widget)
-    right_layout:add(bat1_widget)
+    right_layout:add(battery_widget)
     right_layout:add(volume_widget)
     right_layout:add(mytextclock)
     right_layout:add(mylayoutbox[s])
-- 
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