Module: Squib::Args::XYWHShorthands

Included in:
Box, Coords, ScaleBox, LayoutParser
Defined in:
lib/squib/args/xywh_shorthands.rb

Constant Summary collapse

MIDDLE_ONLY = 
/^(middle|center)\s*$/
DECK_ONLY = 
/^deck\s*$/
MIDDLE_MINUS_REGEX = 
/^(middle|center)\s*\-\s*/
MIDDLE_PLUS_REGEX = 
/^(middle|center)\s*\+\s*/
DECK_MINUS_REGEX = 
/^deck\s*\-\s*/
DECK_PLUS_REGEX = 
/^deck\s*\+\s*/
DECK_DIV_REGEX = 
/^deck\s*\/\s*/

Instance Method Summary collapse

Instance Method Details

#apply_shorthands(arg, deck, axis: :x) ⇒ Object

dimension is usually either deck_width or deck_height



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# File 'lib/squib/args/xywh_shorthands.rb', line 16

def apply_shorthands(arg, deck, axis: :x)
  dimension = (axis == :x) ? deck.width : deck.height
  arg_s = arg.to_s
  case arg_s
  when MIDDLE_ONLY
    dimension / 2.0
  when DECK_ONLY
    dimension
  when MIDDLE_MINUS_REGEX # e.g. width: middle - 3
    n = arg_s.sub MIDDLE_MINUS_REGEX, ''
    n = UnitConversion.parse(n, deck.dpi, deck.cell_px).to_f
    dimension / 2.0 - n
  when MIDDLE_PLUS_REGEX # e.g. middle + 1.5in
    n = arg_s.sub MIDDLE_PLUS_REGEX, ''
    n = UnitConversion.parse(n, deck.dpi, deck.cell_px).to_f
    dimension / 2.0 + n
  when DECK_MINUS_REGEX # e.g. width: deck - 1.5in
    n = arg_s.sub DECK_MINUS_REGEX, ''
    n = UnitConversion.parse(n, deck.dpi, deck.cell_px).to_f
    dimension - n
  when DECK_PLUS_REGEX # e.g. deck + 1.5in (which is weird but ok)
    n = arg_s.sub DECK_PLUS_REGEX, ''
    n = UnitConversion.parse(n, deck.dpi, deck.cell_px).to_f
    dimension + n
  when DECK_DIV_REGEX # e.g. width: deck/3
    n = arg_s.sub DECK_DIV_REGEX, ''
    n = UnitConversion.parse(n, deck.dpi, deck.cell_px).to_f
    dimension / n
  else
    arg
  end
end