Class: RubyEscPos

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-escpos.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RubyEscPos

Returns a new instance of RubyEscPos.



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# File 'lib/ruby-escpos.rb', line 4

def initialize
  @buffer = ''
end

Instance Attribute Details

#buffer ⇒ Object

Returns the value of attribute buffer.



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# File 'lib/ruby-escpos.rb', line 2

def buffer
  @buffer
end

Instance Method Details

#barcode(code, width = 64, height = 64, bc = BARCODE_UPC_A, pos = BARCODE_TXT_OFF, font = nil) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 80

def barcode(code, width = 64, height = 64, bc = BARCODE_UPC_A, pos = BARCODE_TXT_OFF, font = nil)
  write TXT_ALIGN_CT

  if height >= 2 && height <= 6
    write BARCODE_HEIGHT
  end

  if width >= 1 && width <=255
    write BARCODE_WIDTH
  end

  write font
  write pos

  write bc
  write code
  new_line
end

#cut(cut_type = PAPER_FULL_CUT) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 107

def cut(cut_type = PAPER_FULL_CUT)
  write "\n\n\n\n\n\n"
  write cut_type
end

#new_line(lines = 1) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 8

def new_line(lines = 1)
  text nil, lines
end

#set(align = TXT_ALIGN_LT, font = TXT_FONT_A, font_type = FONT_TYPE_NORMAL, width = 1, height = 1, density = nil) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 40

def set(align = TXT_ALIGN_LT, font = TXT_FONT_A, font_type = FONT_TYPE_NORMAL, width = 1, height = 1, density = nil)
  write align

  if height == 2 && width == 2
    write TXT_NORMAL
    write TXT_4SQUARE
  elsif height == 2 && width != 2
    write TXT_NORMAL
    write TXT_2HEIGHT
  elsif width == 2 && height != 2
    write TXT_NORMAL
    write TXT_2WIDTH
  else
    write TXT_NORMAL
  end

  if font_type == FONT_TYPE_BOLD
    write TXT_BOLD_ON
    write TXT_UNDERL_OFF
  elsif font_type == FONT_TYPE_UNDERLINE
    write TXT_BOLD_OFF
    write TXT_UNDERL_ON
  elsif font_type == FONT_TYPE_UNDERLINE_2
    write TXT_BOLD_OFF
    write TXT_UNDERL2_ON
  elsif font_type == FONT_TYPE_BOLD_UNDERLINE
    write TXT_BOLD_ON
    write TXT_UNDERL_ON
  elsif font_type == FONT_TYPE_BOLD_UNDERLINE_2
    write TXT_BOLD_ON
    write TXT_UNDERL2_ON
  else
    write TXT_BOLD_OFF
    write TXT_UNDERL_OFF
  end

  write font
  write density if density
end

#style(style, align) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 12

def style(style, align)
  if style == :header
    style = STYLE_HEADER
  elsif style == :subheader
    style = STYLE_SUBHEADER
  elsif style == :normal
    style = STYLE_NORMAL
  elsif style == :footer
    style = STYLE_FOOTER
  end

  if align == :left
    align = TXT_ALIGN_LT
  elsif align == :center
    align = TXT_ALIGN_CT
  elsif align == :right
    align = TXT_ALIGN_RT
  end

  set(
    align,
    style[:font],
    style[:font_type],
    style[:width],
    style[:height]
  )
end

#table(rows, new_lines = 1, main_column_index = 1, max_width = 42) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 112

def table(rows, new_lines = 1, main_column_index = 1, max_width = 42)
  max_widths = Array.new(rows[0].count) { |i| 0 }

  rows.each_with_index do |row, i|
    row.each_with_index do |cell, y|
      if y < row.length - 1
        rows[i][y][:text] += ' '
      end

      if max_widths[y] < cell[:text].length
        max_widths[y] = cell[:text].length
      end

      if max_widths[y] < cell[:width].to_i
        max_widths[y] = cell[:width]
      end

      if cell[:text].length < cell[:width].to_i
        cell[:text] = (' ' * (cell[:width] - cell[:text].length)) + cell[:text]
      end
    end
  end

  rows.each_with_index do |row, i|
    row.each_with_index do |cell, y|
      padding = ''
      if y == main_column_index
        padding = (' ' * (max_width - row.map { |x| x[:text].length }.inject(0, :+)))
      elsif y < row.length - 1
        padding = (' ' * (max_widths[y] - cell[:text].length))
      end

      if cell[:align]
        write(cell[:text] = padding + cell[:text])
      else
        write(cell[:text] = cell[:text] + padding)
      end
    end
    new_line
  end

  new_line new_lines - 1
end

#text(txt, new_lines = 1) ⇒ Object 



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# File 'lib/ruby-escpos.rb', line 99

def text(txt, new_lines = 1)
  @buffer += txt if txt

  (1..new_lines).each do
    @buffer += "\n"
  end
end