class Temple::Parsers::ERB

def append_static(result, content)
  result << [:static, content]
  content.count("\n").times do
    result << [:newline]
  end
end

def compile(src)
  if src.respond_to?(:encoding) && src.encoding.dummy?
    raise ArgumentError, "#{src.encoding} is not ASCII compatible"
  end
  
  result = [:multi]
  
  content = ''
  scanner = @compiler.make_scanner(src)
  scanner.scan do |token|
    next if token.nil? 
    next if token == ''
    if scanner.stag.nil?
      case token
      when Compiler::PercentLine
        append_static(result, content) if content.size > 0
        content = ''
        result << [:block, token.to_s.strip]
        result << [:newline]
      when :cr
        result << [:newline]
      when '<%', '<%=', '<%#'
        scanner.stag = token
      when "\n"
        content << "\n"
        append_static(result, content)
        content = ''
      when '<%%'
        result << [:static, '<%']
      else
        append_static(result, token)
      end
    else
      case token
      when '%>'
        case scanner.stag
        when '<%'
          if content[-1] == ?\n
            content.chop!
            result << [:block, content]
            result << [:newline]
          else
            result << [:block, content]
          end
        when '<%='
          result << [:dynamic, content]
        when '<%#'
          # nothing
        end
        scanner.stag = nil
        content = ''
      when '%%>'
        content << '%>'
      else
        content << token
      end
    end
  end
  
  result
end

def initialize(options = {})
  @compiler = Compiler.new(options[:trim_mode])
end