module Erubis::RubyGenerator

def self.supported_properties()  # :nodoc:
  return []
end

def add_expr_debug(src, code)
  code.strip!
  s = (code.dump =~ /\A"(.*)"\z/) && $1
  src << ' $stderr.puts("*** debug: ' << s << '=#{(' << code << ').inspect}");'
end

def add_expr_escaped(src, code)
  src << " #{@bufvar} << " << escaped_expr(code) << ';'
end

def add_expr_literal(src, code)
  src << " #{@bufvar} << (" << code << ').to_s;'
end

def add_stmt(src, code)
  #src << code << ';'
  src << code
  src << ';' unless code[-1] == ?\n
end

def add_text(src, text)
  src << " #{@bufvar} << '" << escape_text(text) << "';" unless text.empty?
end

def escape_text(text)
  text.gsub(/['\\]/, '\\\\\&')   # "'" => "\\'",  '\\' => '\\\\'
end

def escaped_expr(code)
  return "#{@escapefunc}(#{code})"
end

def init_generator(properties={})
  super
  @escapefunc ||= "Erubis::XmlHelper.escape_xml"
  @bufvar     = properties[:bufvar] || "_buf"
end