Module: RuboCop::Cop::StatementModifier

Includes:
IfNode
Included in:
RuboCop::Cop::Style::IfUnlessModifier, RuboCop::Cop::Style::WhileUntilModifier
Defined in:
lib/rubocop/cop/mixin/statement_modifier.rb

Overview

Common functionality for modifier cops.

Instance Method Summary collapse

Methods included from IfNode

#elsif?, #if_else?, #modifier_if?, #ternary_op?

Instance Method Details

#body_has_comment?(body) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/cop/mixin/statement_modifier.rb', line 51

def body_has_comment?(body)
  comment_lines = processed_source.comments.map(&:location).map(&:line)
  body_line = body.loc.expression.line
  comment_lines.include?(body_line)
end

#body_length(body) ⇒ Object 



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# File 'lib/rubocop/cop/mixin/statement_modifier.rb', line 43

def body_length(body)
  if body && body.loc.expression
    body.loc.expression.size
  else
    0
  end
end

#fit_within_line_as_modifier_form?(node) ⇒ Boolean

TODO: Extremely ugly solution that needs lots of polish.

Returns:

  • (Boolean) 


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# File 'lib/rubocop/cop/mixin/statement_modifier.rb', line 10

def fit_within_line_as_modifier_form?(node)
  case node.loc.keyword.source
  when 'if'     then cond, body, _else = *node
  when 'unless' then cond, _else, body = *node
  else               cond, body = *node
  end

  return false if length(node) > 3

  body_length = body_length(body)

  return false if body_length == 0

  return false if cond.each_node.any?(&:lvasgn_type?)

  indentation = node.loc.keyword.column
  kw_length = node.loc.keyword.size
  cond_length = cond.loc.expression.size
  space = 1
  total = indentation + body_length + space + kw_length + space +
          cond_length
  total <= max_line_length && !body_has_comment?(body)
end

#length(node) ⇒ Object 



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# File 'lib/rubocop/cop/mixin/statement_modifier.rb', line 39

def length(node)
  node.loc.expression.source.lines.to_a.size
end

#max_line_length ⇒ Object 



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# File 'lib/rubocop/cop/mixin/statement_modifier.rb', line 34

def max_line_length
  cop_config && cop_config['MaxLineLength'] ||
    config.for_cop('Metrics/LineLength')['Max']
end