Class: Murdoc::Scanner

Inherits:
Object
  • Object
show all
Defined in:
lib/murdoc/scanner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(language) ⇒ Scanner

Returns a new instance of Scanner.



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# File 'lib/murdoc/scanner.rb', line 7

def initialize(language)
  @language = language
end

Instance Attribute Details

#language ⇒ Object (readonly)

Returns the value of attribute language.



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# File 'lib/murdoc/scanner.rb', line 5

def language
  @language
end

Instance Method Details

#call(source, do_not_count_comment_lines = false) ⇒ Object 



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# File 'lib/murdoc/scanner.rb', line 11

def call(source, do_not_count_comment_lines = false)
  paragraphs = []
  ss = StringScanner.new(source)
  line = i = src_line = 0

  loop do
    comment_lines = []
    code_lines = []

    # Multi line comments
    if has_mlc?
      while (ss.scan(mlcb_regex))
        comment = ''

        while (!ss.eos? && !ss.match?(/.*#{mlce_regex}/))
          i += 1
          comment << ss.scan(/.*?$/)
          comment << ss.getch.to_s
        end

        if (fragment = ss.scan(/.*#{mlce_regex}/))
          comment << fragment.sub(mlce_regex, '')
        end

        ss.scan(/[ \t]*\n/) # skip trailing whitespace and a newline
        comment_lines << remove_common_space_prefix(comment)
      end
    end

    # Single line comments
    if has_slc?
      while (ss.scan(slc_regex))
        comment = ''
        comment << ss.scan(/.*?$/)
        comment << ss.getch.to_s
        comment_lines << comment
        i += 1
      end
    end


    # Code
    empty_leading_lines_count = skip_empty_lines(ss)
    i += empty_leading_lines_count
    src_line += empty_leading_lines_count

    line = do_not_count_comment_lines ? src_line : i
    while (!comment_start?(ss) && !ss.eos?)
      code = ss.scan(/^.*?$/)
      code << ss.getch.to_s
      code_lines << code
      i += 1
      src_line += 1
    end

    code = post_process_code(code_lines.join(''))
    comments = post_process_comments(comment_lines.join(''))

    paragraphs << Paragraph.new(code,
                                comments,
                                line,
                                language.name)

    break if ss.eos?
  end

  paragraphs
end