Contents

# frozen_string_literal: true

module Slimembedcop
  # Extract Ruby codes from Slim embedded code.
  class Extractor
    def initialize(source)
      @source = source
    end

    def run
      ranges.map do |(begin_, end_)|
        { code: @source[begin_...end_], offset: begin_ }
      end
    end

    private

    def ranges
      result = []
      index = 0
      begin_pos = 0
      leading_spaces = 0
      inside_ruby = false
      @source.each_line do |line|
        if block_start?(line)
          leading_spaces = line.match(/^\s*/)[0].length
          inside_ruby = true
          begin_pos = index += line.length
          next
        end

        if inside_ruby && block_end?(line, leading_spaces)
          result << [begin_pos, index - 1]
          inside_ruby = false
        end

        index += line.length
      end

      result << [begin_pos, index - 1] if inside_ruby

      result
    end

    def block_start?(line)
      line.strip.start_with?('ruby:')
    end

    def block_end?(line, leading_spaces)
      line.match(/^\s{#{leading_spaces}}\S/) ||
        (leading_spaces.zero? && line.match(/^\S/))
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
slimembedcop-1.0.0	lib/slimembedcop/extractor.rb
slimembedcop-0.2.0	lib/slimembedcop/extractor.rb