Method: RubyRTF::Parser#parse_control

Defined in:
lib/ruby-rtf/parser.rb

#parse_control(src, current_pos = 0) ⇒ String, ...

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Parses a control switch

Parameters:

  • src (String) —

    The fragment to parse

  • current_pos (Integer) (defaults to: 0) —

    The position in string the control starts at (after the )

Returns:

  • (String, String|Integer, Integer) —

    The name, optional control value and the new current position



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# File 'lib/ruby-rtf/parser.rb', line 76

def parse_control(src, current_pos = 0)
  ctrl = ''
  val = nil

  max_len = src.length
  start = current_pos

  # handle hex special
  if src[current_pos] == "'"
    val = src[(current_pos + 1), 2].hex.chr
    current_pos += 3
    return [:hex, val, current_pos]
  end

  while (true)
    break if current_pos >= max_len
    break if STOP_CHARS.include?(src[current_pos])

    current_pos += 1
  end
  return [src[current_pos].to_sym, nil, current_pos + 1] if start == current_pos

  contents = src[start, current_pos - start]
  m = contents.match(/([\*a-z]+)(\-?\d+)?\*?/)
  ctrl = m[1].to_sym
  val = m[2].to_i unless m[2].nil?

  # we advance past the optional space if present
  current_pos += 1 if src[current_pos] == ' '

  [ctrl, val, current_pos]
end