# File erubis/converter.rb, line 224
    def convert(input)
      code = super(input)
      return @header || @footer ? "#{@header}#{code}#{@footer}" : code
    end

# File erubis/converter.rb, line 215
    def init_converter(properties={})
      super(properties)
      @trim    = properties.fetch(:trim, true)
      @pi      = properties[:pi] if properties[:pi]
      @embchar = properties[:embchar] || '@'
      @pattern = properties[:pattern]
      @pattern = '<% %>' if @pattern.nil?  #|| @pattern == true
    end

# File erubis/converter.rb, line 231
    def convert_input(codebuf, input)
      unless @regexp
        @pi ||= 'e'
        ch = Regexp.escape(@embchar)
        if @pattern
          left, right = @pattern.split(' ')
          @regexp = /<\?#{@pi}(?:-(\w+))?(\s.*?)\?>([ \t]*\r?\n)?|#{ch}(!*)?\{(.*?)\}#{ch}|#{left}(=+)(.*?)#{right}/m
        else
          @regexp = /<\?#{@pi}(?:-(\w+))?(\s.*?)\?>([ \t]*\r?\n)?|#{ch}(!*)?\{(.*?)\}#{ch}/m
        end
      end
      #
      is_bol = true
      pos = 0
      input.scan(@regexp) do |pi_arg, stmt, rspace,
                              indicator1, expr1, indicator2, expr2|
        match = Regexp.last_match
        len = match.begin(0) - pos
        text = input[pos, len]
        pos = match.end(0)
        lspace = stmt ? detect_spaces_at_bol(text, is_bol) : nil
        is_bol = stmt && rspace ? true : false
        add_text(codebuf, text) # unless text.empty?
        #
        if stmt
          if @trim && lspace && rspace
            add_pi_stmt(codebuf, "#{lspace}#{stmt}#{rspace}", pi_arg)
          else
            add_text(codebuf, lspace) if lspace
            add_pi_stmt(codebuf, stmt, pi_arg)
            add_text(codebuf, rspace) if rspace
          end
        else
          add_pi_expr(codebuf, expr1 || expr2, indicator1 || indicator2)
        end
      end
      #rest = $' || input                        # ruby1.8
      rest = pos == 0 ? input : input[pos..-1]   # ruby1.9
      add_text(codebuf, rest)
    end