class Tailor::Rulers::SpacesBeforeRbracketRuler

Checks for spaces before a ] as given by +@config+. It skips checking when:

Public Class Methods

new(config, options) click to toggle source
Calls superclass method Tailor::Ruler::new
# File lib/tailor/rulers/spaces_before_rbracket_ruler.rb, line 12
def initialize(config, options)
  super(config, options)
  add_lexer_observers :rbracket
end

Public Instance Methods

count_spaces(lexed_line, column) click to toggle source

@param [LexedLine] lexed_line @param [Fixnum] column @return [Fixnum] The number of spaces before the rbracket.

# File lib/tailor/rulers/spaces_before_rbracket_ruler.rb, line 20
def count_spaces(lexed_line, column)
  current_index = lexed_line.event_index(column)
  log "Current event index: #{current_index}"
  previous_event = lexed_line.at(current_index - 1)
  log "Previous event: #{previous_event}"

  if column.zero? || previous_event.nil? ||
    previous_event[1] == :on_lbracket
    return nil
  end

  return 0 if previous_event[1] != :on_sp
  return nil if current_index - 2 < 0

  second_previous_event = lexed_line.at(current_index - 2)
  return nil if second_previous_event[1] == :on_lbracket

  previous_event.last.size
end
measure(actual_spaces, lineno, column) click to toggle source

Checks to see if the counted spaces before an rbracket equals the value at +@config+.

@param [Fixnum] actual_spaces The number of spaces before the rbracket. @param [Fixnum] lineno Line the potential problem is on. @param [Fixnum] column Column the potential problem is on.

# File lib/tailor/rulers/spaces_before_rbracket_ruler.rb, line 46
def measure(actual_spaces, lineno, column)
  if actual_spaces != @config
    msg = "Line has #{actual_spaces} space(s) before a ], "
    msg << "but should have #{@config}."

    @problems << Problem.new(problem_type, lineno, column, msg,
      @options[:level])
  end
end
rbracket_update(lexed_line, lineno, column) click to toggle source

This has to keep track of +{+s and only follow through with the check if the +{+ was an lbrace because Ripper doesn't scan the +}+ of an embedded expression (embexpr_end) as such.

@param [Tailor::LexedLine] lexed_line @param [Fixnum] lineno @param [Fixnum] column

# File lib/tailor/rulers/spaces_before_rbracket_ruler.rb, line 63
def rbracket_update(lexed_line, lineno, column)
  count = count_spaces(lexed_line, column)

  if count.nil?
    log 'rbracket must be at the beginning of the line.'
    return
  else
    log "Found #{count} space(s) before rbracket."
  end

  measure(count, lineno, column)
end