battery.rb

# Battery sublet file
# Created with sur-0.1
configure :battery do |s|
  s.interval = 60
  s.full     = 0

  # Path
  s.now      = []
  s.status   = []

  # Icons
  s.icons = {
    :ac    => Subtlext::Icon.new("ac.xbm"),
    :full  => Subtlext::Icon.new("bat_full_02.xbm"),
    :low   => Subtlext::Icon.new("bat_low_02.xbm"),
    :empty => Subtlext::Icon.new("bat_empty_02.xbm")
  }

  # Find battery slot and capacity
  begin
    Dir.glob "/sys/class/power_supply/CMB*/" do |path|
      case File.basename(Dir["#{path}/{charge_full_design,energy_full_design}"].first)
      when 'charge_full_design'
        full, now = 'charge_full', 'charge_now'
      when 'energy_now'
        full, now = 'energy_full_design', 'energy_now'
      else
        raise "Unrecognized power supply: #{path}"
      end

      s.now << File.join(path, now)
      s.status << File.join(path, 'status')
      s.full += File.read(File.join(path, full)).to_i
    end
  rescue => err
    puts err, err.backtrace
    File.open('/home/manveru/tmp/subtle_error.log', 'a+'){|io| io.puts(err.message, *err.backtrace) }
  end
end

on :run do |s|
  begin
    now     = s.now.inject(0){|s,v| s + File.read(v).to_i }
    state   = File.read(s.status.first).strip
    percent = (now * 100 / s.full).to_i

    # Select icon
    icon = case state
      when "Charging"  then :ac
      when "Discharging"
        case percent
          when 67..100 then :full
          when 34..66  then :low
          when 0..33   then :empty
        end
      when "Full"      then :ac
    end

    s.data = "%d%%%s" % [ percent, s.icons[icon] ]
  rescue => err # Sanitize to prevent unloading
    s.data = "subtle"
    File.open('/home/manveru/tmp/subtle_error.log', 'a+'){|io| io.puts(err.message, *err.backtrace) }
  end
end