# class Gitlab::InlineDiff

### Constants

FINISH
START

### Public Class Methods

_indexes_of_changed_lines(diff_arr) click to toggle source

    # File lib/gitlab/inline_diff.rb, line 42
    def _indexes_of_changed_lines diff_arr
      chain_of_first_symbols = ""
      diff_arr.each_with_index do |line, i|
        chain_of_first_symbols += line[0]
      end
      chain_of_first_symbols.gsub!(%r[^\-\+]/, "#")

      offset = 0
      indexes = []
      while index = chain_of_first_symbols.index("#-+#", offset)
        indexes << index
        offset = index + 1
      end
      indexes
    end

processing(diff_arr) click to toggle source

    # File lib/gitlab/inline_diff.rb, line 8
    def processing diff_arr
      indexes = _indexes_of_changed_lines diff_arr

      indexes.each do |index|
        first_line = diff_arr[index+1]
        second_line = diff_arr[index+2]
        max_length = [first_line.size, second_line.size].max

        first_the_same_symbols = 0
        (0..max_length + 1).each do |i|
          first_the_same_symbols = i - 1
          if first_line[i] != second_line[i] && i > 0
            break
          end
        end
        first_token = first_line[0..first_the_same_symbols][1..-1]
        diff_arr[index+1].sub!(first_token, first_token + START)
        diff_arr[index+2].sub!(first_token, first_token + START)
        last_the_same_symbols = 0
        (1..max_length + 1).each do |i|
          last_the_same_symbols = -i
          shortest_line = second_line.size > first_line.size ? first_line : second_line
          if ( first_line[-i] != second_line[-i] ) || "#{first_token}#{START}".size == shortest_line[1..-i].size
            break
          end
        end
        last_the_same_symbols += 1
        last_token = first_line[last_the_same_symbols..-1]
        diff_arr[index+1].sub!(%r#{Regexp.escape(last_token)}$/, FINISH + last_token)
        diff_arr[index+2].sub!(%r#{Regexp.escape(last_token)}$/, FINISH + last_token)
      end
      diff_arr
    end

replace_markers(line) click to toggle source

    # File lib/gitlab/inline_diff.rb, line 58
    def replace_markers line
      line.gsub!(START, "<span class='idiff'>")
      line.gsub!(FINISH, "</span>")
      line
    end