AlkantarClanX12
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# frozen_string_literal: true
module SyntaxSuggest
module Capture
# Shows surrounding kw/end pairs
#
# The purpose of showing these extra pairs is due to cases
# of ambiguity when only one visible line is matched.
#
# For example:
#
# 1 class Dog
# 2 def bark
# 4 def eat
# 5 end
# 6 end
#
# In this case either line 2 could be missing an `end` or
# line 4 was an extra line added by mistake (it happens).
#
# When we detect the above problem it shows the issue
# as only being on line 2
#
# 2 def bark
#
# Showing "neighbor" keyword pairs gives extra context:
#
# 2 def bark
# 4 def eat
# 5 end
#
#
# Example:
#
# lines = BeforeAfterKeywordEnds.new(
# block: block,
# code_lines: code_lines
# ).call()
#
class BeforeAfterKeywordEnds
def initialize(code_lines:, block:)
@scanner = ScanHistory.new(code_lines: code_lines, block: block)
@original_indent = block.current_indent
end
def call
lines = []
@scanner.scan(
up: ->(line, kw_count, end_count) {
next true if line.empty?
break if line.indent < @original_indent
next true if line.indent != @original_indent
# If we're going up and have one complete kw/end pair, stop
if kw_count != 0 && kw_count == end_count
lines << line
break
end
lines << line if line.is_kw? || line.is_end?
true
},
down: ->(line, kw_count, end_count) {
next true if line.empty?
break if line.indent < @original_indent
next true if line.indent != @original_indent
# if we're going down and have one complete kw/end pair,stop
if kw_count != 0 && kw_count == end_count
lines << line
break
end
lines << line if line.is_kw? || line.is_end?
true
}
)
@scanner.stash_changes
lines
end
end
end
end