Method: LinuxStat::Battery.charge

Defined in:
lib/linux_stat/battery.rb

.charge ⇒ Object

Returns the charge of the battery.

If the battery is not present or the information is not available, it will return nil.



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# File 'lib/linux_stat/battery.rb', line 107

def charge
	@@charge_now_file ||= if File.readable?(File.join(PATH, 'charge_now'))
		File.join(PATH, 'charge_now').freeze
	elsif File.readable?(File.join(PATH, 'energy_now'))
		File.join(PATH, 'energy_now').freeze
	end

	@@charge_full_file ||= if File.readable?(File.join(PATH, 'charge_full'))
		File.join(PATH, 'charge_full').freeze
	elsif File.readable?(File.join(PATH, 'energy_full'))
		File.join(PATH, 'energy_full').freeze
	end

	return nil unless @@charge_now_file && @@charge_full_file

	charge_now = IO.read(@@charge_now_file).to_i
	charge_full = IO.read(@@charge_full_file).to_i

	percentage = charge_now.*(100).fdiv(charge_full)
	percentage > 100 ? 100.0 : percentage < 0 ? 0.0 : percentage
end