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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Layout
# Checks for two or more consecutive blank lines.
#
# @example
#
# # bad - It has two empty lines.
# some_method
# # one empty line
# # two empty lines
# some_method
#
# # good
# some_method
# # one empty line
# some_method
#
class EmptyLines < Base
include RangeHelp
extend AutoCorrector
MSG = 'Extra blank line detected.'
LINE_OFFSET = 2
def on_new_investigation
return if processed_source.tokens.empty?
# Quick check if we possibly have consecutive blank lines.
return unless processed_source.raw_source.include?("\n\n\n")
lines = Set.new
processed_source.each_token { |token| lines << token.line }
each_extra_empty_line(lines.sort) do |range|
add_offense(range) do |corrector|
corrector.remove(range)
end
end
end
private
def each_extra_empty_line(lines)
prev_line = 1
lines.each do |cur_line|
if exceeds_line_offset?(cur_line - prev_line)
# we need to be wary of comments since they
# don't show up in the tokens
((prev_line + 1)...cur_line).each do |line|
next unless previous_and_current_lines_empty?(line)
yield source_range(processed_source.buffer, line, 0)
end
end
prev_line = cur_line
end
end
def exceeds_line_offset?(line_diff)
line_diff > LINE_OFFSET
end
def previous_and_current_lines_empty?(line)
processed_source[line - 2].empty? && processed_source[line - 1].empty?
end
end
end
end
end
Version data entries
15 entries across 15 versions & 3 rubygems