Class: Tailor::Rulers::SpacesBeforeRparenRuler

Inherits:
Tailor::Ruler show all
Defined in:
lib/tailor/rulers/spaces_before_rparen_ruler.rb

Overview

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

  • it’s the first char in the line.

  • it’s directly preceded by a (.

  • it’s directly preceded by spaces, then a (.

Instance Attribute Summary

Attributes inherited from Tailor::Ruler

#lexer_observers

Instance Method Summary collapse

Methods inherited from Tailor::Ruler

#add_child_ruler, #problem_type, #problems

Methods included from Logger::Mixin

included

Constructor Details

#initialize(config, options) ⇒ SpacesBeforeRparenRuler

Returns a new instance of SpacesBeforeRparenRuler.



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# File 'lib/tailor/rulers/spaces_before_rparen_ruler.rb', line 12

def initialize(config, options)
  super(config, options)
  add_lexer_observers :rparen
end

Instance Method Details

#count_spaces(lexed_line, column) ⇒ Fixnum

Returns the number of spaces before the rparen.

Parameters:

Returns:

  • (Fixnum) —

    the number of spaces before the rparen.



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# File 'lib/tailor/rulers/spaces_before_rparen_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_lparen
    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_lparen

  previous_event.last.size
end

#measure(actual_spaces, lineno, column) ⇒ Object

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

Parameters:

  • actual_spaces (Fixnum) —

    The number of spaces before the rparen.

  • lineno (Fixnum) —

    Line the potential problem is on.

  • column (Fixnum) —

    Column the potential problem is on.



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# File 'lib/tailor/rulers/spaces_before_rparen_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

#rparen_update(lexed_line, lineno, column) ⇒ Object

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.

Parameters:



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# File 'lib/tailor/rulers/spaces_before_rparen_ruler.rb', line 63

def rparen_update(lexed_line, lineno, column)
  count = count_spaces(lexed_line, column)

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

  measure(count, lineno, column)
end