Class: Parslet::Source::LineCache

Inherits:
Object
  • Object
show all
Defined in:
lib/csscss/parslet_optimizations.rb

Instance Method Summary collapse

Instance Method Details

#scan_for_line_endings(start_pos, buf) ⇒ Object 



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# File 'lib/csscss/parslet_optimizations.rb', line 55

def scan_for_line_endings(start_pos, buf)
  return unless buf

  buf = StringScanner.new(buf)
  return unless buf.exist?(/\n/)

  ## If we have already read part or all of buf, we already know about
  ## line ends in that portion. remove it and correct cur (search index)
  if @last_line_end && start_pos < @last_line_end
    # Let's not search the range from start_pos to last_line_end again.
    buf.pos = @last_line_end - start_pos
  end

  ## Scan the string for line endings; store the positions of all endings
  ## in @line_ends. 
  while buf.skip_until(/\n/)
    @last_line_end = start_pos + buf.pos
    @line_ends << @last_line_end
  end
end