Module: Prawn::Measurements

Included in:
Numeric
Defined in:
lib/prawn/measurements.rb

Overview

Distance unit conversions between metric, imperial, and PDF.

Stable API collapse

Instance Method Details

#cm2mm(cm) ⇒ Number

Convert centimeter to millimeters.

Parameters:

  • cm (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 15

def cm2mm(cm)
  cm * 10
end

#cm2pt(cm) ⇒ Number

Convert centimeters to points.

Parameters:

  • cm (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 100

def cm2pt(cm)
  mm2pt(cm2mm(cm))
end

#dm2mm(dm) ⇒ Number

Convert decimeters to millimeters.

Parameters:

  • dm (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 23

def dm2mm(dm)
  dm * 100
end

#dm2pt(dm) ⇒ Number

Convert decimeters to points.

Parameters:

  • dm (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 108

def dm2pt(dm)
  mm2pt(dm2mm(dm))
end

#ft2in(ft) ⇒ Number

Convert feet to inches.

Parameters:

  • ft (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 42

def ft2in(ft)
  ft * 12
end

#ft2pt(ft) ⇒ Number

Convert feet to points.

Parameters:

  • ft (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 76

def ft2pt(ft)
  in2pt(ft2in(ft))
end

#in2pt(inch) ⇒ Number

Convert inches to points.

Parameters:

  • inch (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 68

def in2pt(inch)
  inch * 72
end

#m2mm(m) ⇒ Number

Convert meters to millimeters.

Parameters:

  • m (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 31

def m2mm(m)
  m * 1000
end

#m2pt(m) ⇒ Number

Convert meters to points.

Parameters:

  • m (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 116

def m2pt(m)
  mm2pt(m2mm(m))
end

#mm2pt(mm) ⇒ Number

Convert millimeters to points.

Parameters:

  • mm (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 92

def mm2pt(mm)
  mm * (72 / 25.4)
end

#pt2mm(pt) ⇒ Number

Convert points to millimeters.

Parameters:

  • pt (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 124

def pt2mm(pt)
  pt * 1 / mm2pt(1) # (25.4 / 72)
end

#pt2pt(pt) ⇒ Number

Convert points to points. For completeness.

Parameters:

  • pt (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 60

def pt2pt(pt)
  pt
end

#yd2in(yd) ⇒ Number

Convert yards to inches.

Parameters:

  • yd (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 50

def yd2in(yd)
  yd * 36
end

#yd2pt(yd) ⇒ Number

Convert yards to points.

Parameters:

  • yd (Number)

Returns:

  • (Number) 


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# File 'lib/prawn/measurements.rb', line 84

def yd2pt(yd)
  in2pt(yd2in(yd))
end