Class: PT::PaperSize

Inherits:
Object
  • Object
show all
Defined in:
lib/pt/papersize.rb,
lib/pt/papersize/version.rb,
lib/pt/papersize/paper_sizes.rb

Constant Summary collapse

VERSION = 
"0.1.1"
PAPER_SIZES = 
[
  # ISO paper sizes
  { name: 'A0', standard: 'ISO216', width: 841, height: 1189 },
  { name: 'A1', standard: 'ISO216', width: 594, height: 841 },
  { name: 'A2', standard: 'ISO216', width: 420, height: 594 },
  { name: 'A3', standard: 'ISO216', width: 297, height: 420 },
  { name: 'A4', standard: 'ISO216', width: 210, height: 297 },
  { name: 'A5', standard: 'ISO216', width: 148, height: 210 },
  { name: 'A6', standard: 'ISO216', width: 105, height: 148 },
  { name: 'A7', standard: 'ISO216', width: 74, height: 105 },
  { name: 'A8', standard: 'ISO216', width: 52, height: 74 },
  { name: 'A9', standard: 'ISO216', width: 37, height: 52 },
  { name: 'A10', standard: 'ISO216', width: 26, height: 37 },

  { name: 'B0', standard: 'ISO216', width: 1000, height: 1414 },
  { name: 'B1', standard: 'ISO216', width: 707, height: 1000 },
  { name: 'B2', standard: 'ISO216', width: 500, height: 707 },
  { name: 'B3', standard: 'ISO216', width: 353, height: 500 },
  { name: 'B4', standard: 'ISO216', width: 250, height: 353 },
  { name: 'B5', standard: 'ISO216', width: 176, height: 250 },
  { name: 'B6', standard: 'ISO216', width: 125, height: 176 },
  { name: 'B7', standard: 'ISO216', width: 88, height: 125 },
  { name: 'B8', standard: 'ISO216', width: 62, height: 88 },
  { name: 'B9', standard: 'ISO216', width: 44, height: 62 },
  { name: 'B10', standard: 'ISO216', width: 31, height: 44 },

  { name: 'C0', standard: 'ISO216', width: 917, height: 1297 },
  { name: 'C1', standard: 'ISO216', width: 648, height: 917 },
  { name: 'C2', standard: 'ISO216', width: 458, height: 648 },
  { name: 'C3', standard: 'ISO216', width: 324, height: 458 },
  { name: 'C4', standard: 'ISO216', width: 229, height: 324 },
  { name: 'C5', standard: 'ISO216', width: 162, height: 229 },
  { name: 'C6', standard: 'ISO216', width: 114, height: 162 },
  { name: 'C7', standard: 'ISO216', width: 81, height: 114 },
  { name: 'C8', standard: 'ISO216', width: 57, height: 81 },
  { name: 'C9', standard: 'ISO216', width: 40, height: 57 },
  { name: 'C10', standard: 'ISO216', width: 28, height: 40 },

  # Other metric sizes
  { name: 'DL', width: 99, height: 210 },
  { name: 'DLE', width: 110, height: 220 },
  { name: 'F4', width: 210, height: 330 },
  { name: 'RA0', width: 841, height: 1189 },
  { name: 'RA1', width: 610, height: 860 },
  { name: 'RA2', width: 430, height: 610 },
  { name: 'RA3', width: 305, height: 430 },
  { name: 'RA4', width: 215, height: 305 },
  { name: 'SRA0', width: 900, height: 1280 },
  { name: 'SRA1', width: 640, height: 900 },
  { name: 'SRA2', width: 450, height: 640 },
  { name: 'SRA3', width: 320, height: 450 },
  { name: 'SRA4', width: 225, height: 320 },
  { name: 'A3+', width: 29, height: 483 },
]

Class Method Summary collapse

Class Method Details

.find(width, height, units = :pt) ⇒ Object 



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# File 'lib/pt/papersize.rb', line 6

def self.find(width, height, units = :pt)
  short_edge = [width, height].min
  long_edge = [width, height].max

  case units
  when :pt, :point, :points
    short_edge_mm = ((short_edge.to_f / 72.0) * 25.4).round
    long_edge_mm = ((long_edge.to_f / 72.0) * 25.4).round
  when :mm, :millimetre, :millimetres
    short_edge_mm = short_edge
    long_edge_mm = long_edge
  when :inch, :inches
    short_edge_mm = (short_edge.to_f * 25.4).round
    long_edge_mm = (long_edge.to_f * 25.4).round
  end

  available_sizes = PT::PaperSize::PAPER_SIZES.select do |entry|
    (short_edge_mm == entry[:width]) && (long_edge_mm == entry[:height])
  end

  available_sizes.length > 0 ? available_sizes.first : { name: 'Custom', width: short_edge_mm, height: long_edge_mm, units: :mm}
end