class RuboCop::Cop::Layout::FirstArrayElementIndentation
Checks the indentation of the first element in an array literal where the opening bracket and the first element are on separate lines. The other elements’ indentations are handled by the ArrayAlignment
cop.
By default, array literals that are arguments in a method call with parentheses, and where the opening square bracket of the array is on the same line as the opening parenthesis of the method call, shall have their first element indented one step (two spaces) more than the position inside the opening parenthesis.
Other array literals shall have their first element indented one step more than the start of the line where the opening square bracket is.
This default style is called ‘special_inside_parentheses’. Alternative styles are ‘consistent’ and ‘align_brackets’. Here are examples:
@example EnforcedStyle: special_inside_parentheses (default)
# The `special_inside_parentheses` style enforces that the first # element in an array literal where the opening bracket and first # element are on separate lines is indented one step (two spaces) more # than the position inside the opening parenthesis. #bad array = [ :value ] and_in_a_method_call([ :no_difference ]) #good array = [ :value ] but_in_a_method_call([ :its_like_this ])
@example EnforcedStyle: consistent
# The `consistent` style enforces that the first element in an array # literal where the opening bracket and the first element are on # separate lines is indented the same as an array literal which is not # defined inside a method call. #bad # consistent array = [ :value ] but_in_a_method_call([ :its_like_this ]) #good array = [ :value ] and_in_a_method_call([ :no_difference ])
@example EnforcedStyle: align_brackets
# The `align_brackets` style enforces that the opening and closing # brackets are indented to the same position. #bad # align_brackets and_now_for_something = [ :completely_different ] #good # align_brackets and_now_for_something = [ :completely_different ]
Constants
- MSG
Public Instance Methods
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 91 def on_array(node) check(node, nil) if node.loc.begin end
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 95 def on_send(node) each_argument_node(node, :array) do |array_node, left_parenthesis| check(array_node, left_parenthesis) end end
Private Instance Methods
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 104 def autocorrect(corrector, node) AlignmentCorrector.correct(corrector, processed_source, node, @column_delta) end
Returns the description of what the correct indentation is based on.
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 142 def base_description(indent_base_type) case indent_base_type when :left_brace_or_bracket 'the position of the opening bracket' when :first_column_after_left_parenthesis 'the first position after the preceding left parenthesis' when :parent_hash_key 'the parent hash key' else 'the start of the line where the left square bracket is' end end
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 108 def brace_alignment_style :align_brackets end
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 112 def check(array_node, left_parenthesis) return if ignored_node?(array_node) left_bracket = array_node.loc.begin first_elem = array_node.values.first if first_elem return if same_line?(first_elem, left_bracket) check_first(first_elem, left_bracket, left_parenthesis, 0) end check_right_bracket(array_node.loc.end, first_elem, left_bracket, left_parenthesis) end
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 126 def check_right_bracket(right_bracket, first_elem, left_bracket, left_parenthesis) # if the right bracket is on the same line as the last value, accept return if /\S/.match?(right_bracket.source_line[0...right_bracket.column]) expected_column, indent_base_type = indent_base(left_bracket, first_elem, left_parenthesis) @column_delta = expected_column - right_bracket.column return if @column_delta.zero? msg = message_for_right_bracket(indent_base_type) add_offense(right_bracket, message: msg) do |corrector| autocorrect(corrector, right_bracket) end end
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 155 def message(base_description) format( MSG, configured_indentation_width: configured_indentation_width, base_description: base_description ) end
# File lib/rubocop/cop/layout/first_array_element_indentation.rb, line 163 def message_for_right_bracket(indent_base_type) case indent_base_type when :left_brace_or_bracket 'Indent the right bracket the same as the left bracket.' when :first_column_after_left_parenthesis 'Indent the right bracket the same as the first position ' \ 'after the preceding left parenthesis.' when :parent_hash_key 'Indent the right bracket the same as the parent hash key.' \ else 'Indent the right bracket the same as the start of the line ' \ 'where the left bracket is.' end end