Module: Rubocop::Cop::Style::AutocorrectAlignment

Included in:
AlignArray, AlignParameters
Defined in:
lib/rubocop/cop/style/autocorrect_alignment.rb

Overview

This module does auto-correction of nodes that should just be moved to the left or to the right, amount being determined by the instance variable @column_delta.

Instance Method Summary collapse

Instance Method Details

#autocorrect(node) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
 
# File 'lib/rubocop/cop/style/autocorrect_alignment.rb', line 23

def autocorrect(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,
                        expr.source.gsub(/^/, ' ' * column_delta))
    else
      offset = 0
      expr.source.each_line do |line|
        b = expr.begin_pos + offset
        if offset == 0
          range = Parser::Source::Range.new(expr.source_buffer,
                                            b + column_delta,
                                            b + line.length)
          corrector.replace(range, line)
        else
          range = Parser::Source::Range.new(expr.source_buffer,
                                            b, b + line.length)
          corrector.replace(range, line[-column_delta..-1])
        end
        offset += line.length
      end
    end
  end
end

#check_alignment(items) ⇒ Object 



10
11
12
13
14
15
16
17
 
# File 'lib/rubocop/cop/style/autocorrect_alignment.rb', line 10

def check_alignment(items)
  items.each_cons(2) do |prev, current|
    if current.loc.line > prev.loc.line && start_of_line?(current.loc)
      @column_delta = items.first.loc.column - current.loc.column
      convention(current, :expression) if @column_delta != 0
    end
  end
end

#start_of_line?(loc) ⇒ Boolean

Returns:

  • (Boolean) 


19
20
21
 
# File 'lib/rubocop/cop/style/autocorrect_alignment.rb', line 19

def start_of_line?(loc)
  loc.expression.source_line[0...loc.column] =~ /^\s*$/
end