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Contents
# encoding: utf-8
module RuboCop
module Cop
module Style
# This cop checks how the *when*s of a *case* expression
# are indented in relation to its *case* or *end* keyword.
#
# It will register a separate offense for each misaligned *when*.
class CaseIndentation < Cop
include ConfigurableEnforcedStyle
def on_case(case_node)
_condition, *whens, _else = *case_node
base = style
indent = cop_config['IndentOneStep']
base_column = base_column(case_node, base)
whens.each do |when_node|
check_when(when_node, case_node, base, indent, base_column)
end
end
private
def check_when(when_node, case_node, base, indent, base_column)
pos = when_node.loc.keyword
expected_column = base_column +
(indent ? IndentationWidth::CORRECT_INDENTATION : 0)
if pos.column == expected_column
correct_style_detected
else
msg = 'Indent `when` ' + if indent
"one step more than `#{base}`."
else
"as deep as `#{base}`."
end
add_offense(when_node, pos, msg) do
if pos.column == base_column(case_node, alternative_style)
opposite_style_detected
else
unrecognized_style_detected
end
end
end
end
def parameter_name
'IndentWhenRelativeTo'
end
def base_column(case_node, base)
case base
when :case then case_node.location.keyword.column
when :end then case_node.location.end.column
end
end
end
end
end
end
Version data entries
8 entries across 8 versions & 2 rubygems