Method: Textbringer::Buffer#byteindex

Defined in:

lib/textbringer/buffer.rb

#byteindex(forward, re, pos) ⇒ Object

# File 'lib/textbringer/buffer.rb', line 1113

def byteindex(forward, re, pos)
  @match_offsets = []
  method = forward ? :index : :rindex
  adjust_gap(0, point_max)
  s = @contents[0...@gap_start]
  if @binary
    offset = pos
  else
    offset = s.byteslice(0, pos).force_encoding(Encoding::UTF_8).size
    s.force_encoding(Encoding::UTF_8)
  end
  begin
    i = s.send(method, re, offset)
    if i
      m = Regexp.last_match
      if m.nil?
        # A bug of rindex
        @match_offsets.push([pos, pos])
        pos
      else
        b = m.pre_match.bytesize
        e = b + m.to_s.bytesize
        if e <= bytesize
          @match_offsets.push([b, e])
          match_beg = m.begin(0)
          match_str = m.to_s
          (1 .. m.size - 1).each do |j|
            cb, ce = m.offset(j)
            if cb.nil?
              @match_offsets.push([nil, nil])
            else
              bb = b + match_str[0, cb - match_beg].bytesize
              be = b + match_str[0, ce - match_beg].bytesize
              @match_offsets.push([bb, be])
            end
          end
          b
        else
          nil
        end
      end
    else
      nil
    end
  end
end