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# frozen_string_literal: true module SyntaxSuggest module Capture # Shows the context around code provided by "falling" indentation # # If this is the original code lines: # # class OH # def hello # it "foo" do # end # end # # And this is the line that is captured # # it "foo" do # # It will yield its surrounding context: # # class OH # def hello # end # end # # Example: # # FallingIndentLines.new( # block: block, # code_lines: @code_lines # ).call do \|line\| # @lines_to_output << line # end # class FallingIndentLines def initialize(code_lines:, block:) @lines = nil @scanner = ScanHistory.new(code_lines: code_lines, block: block) @original_indent = block.current_indent end def call(&yieldable) last_indent_up = @original_indent last_indent_down = @original_indent @scanner.commit_if_changed @scanner.scan( up: ->(line, _, _) { next true if line.empty? if line.indent < last_indent_up yieldable.call(line) last_indent_up = line.indent end true }, down: ->(line, _, _) { next true if line.empty? if line.indent < last_indent_down yieldable.call(line) last_indent_down = line.indent end true } ) @scanner.stash_changes end end end end