Module: ImageOptim::Runner::Space

Defined in:
lib/image_optim/runner.rb

Constant Summary collapse

SIZE_SYMBOLS = 
%w[B K M G T P E].freeze
PRECISION = 
1
LENGTH = 
4 + PRECISION + 1
EMPTY_SPACE = 
' ' * LENGTH

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.base10=(value) ⇒ Object (writeonly)

Sets the attribute base10

Parameters:

  • value —

    the value to set the attribute base10 to.



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# File 'lib/image_optim/runner.rb', line 21

def base10=(value)
  @base10 = value
end

Class Method Details

.denominator ⇒ Object 



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# File 'lib/image_optim/runner.rb', line 22

def denominator
  @denominator ||= @base10 ? 1000.0 : 1024.0
end

.space(size) ⇒ Object 



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# File 'lib/image_optim/runner.rb', line 26

def space(size)
  case size
  when 0, nil
    EMPTY_SPACE
  else
    log_denominator = Math.log(size) / Math.log(denominator)
    degree = [log_denominator.floor, SIZE_SYMBOLS.length - 1].min
    number = size / (denominator ** degree)
    "#{degree == 0 ? number.to_i : "%.#{PRECISION}f" % number}#{SIZE_SYMBOLS[degree]}".rjust(LENGTH)
  end
end