Class: Rubocop::Cop::Style::AlignParameters

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/style/align_parameters.rb

Overview

Here we check if the parameters on a multi-line method call are aligned.

Constant Summary collapse

MSG = 
'Align the parameters of a method call if they span ' +
'more than one line.'

Constants inherited from Cop

Cop::OPERATOR_METHODS

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offences, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offence, all, #autocorrect?, #convention, #cop_config, cop_name, #cop_name, cop_type, #debug?, #ignore_node, inherited, #initialize, lint?, #message, rails?, style?, #warning

Constructor Details

This class inherits a constructor from Rubocop::Cop::Cop

Instance Method Details

#autocorrect_action(node) ⇒ Object 



31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/rubocop/cop/style/align_parameters.rb', line 31

def autocorrect_action(node)
  # We can't use the instance variable inside the lambda. That would
  # just give each lambda the same reference and they would all get
  # the last value of @column_delta. A local variable fixes the
  # problem.
  column_delta = @column_delta

  @corrections << lambda do |corrector|
    expr = node.loc.expression
    if column_delta > 0
      corrector.replace(expr, ' ' * column_delta + expr.source)
    else
      range = Parser::Source::Range.new(expr.source_buffer,
                                        expr.begin_pos + column_delta,
                                        expr.end_pos)
      corrector.replace(range, expr.source)
    end
  end
end

#on_send(node) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/rubocop/cop/style/align_parameters.rb', line 12

def on_send(node)
  _receiver, method, *args = *node

  return if method == :[]=
  return if args.size <= 1

  first_arg_column = args.first.loc.expression.column

  args.each_cons(2) do |prev, current|
    current_pos = current.loc.expression

    if current_pos.line > prev.loc.expression.line &&
        current_pos.column != first_arg_column
      @column_delta = first_arg_column - current_pos.column
      convention(current, current_pos)
    end
  end
end