indentwidth = 4

_indenter = None

class _IndentedCodeWriter(object):
    def __init__(self, output):
        self.level = 0
        self.output = output

    def indent(self):
        self.level += 1

    def dedent(self):
        self.level -= 1
        
    def write(self, d):
        for line in d.splitlines():
            if line.strip():
                if indentwidth > 0:
                    indent = " " * indentwidth
                    line = line.replace("\t", indent)
                else:
                    indent = "\t"

                self.output.write("%s%s\n" % (indent * self.level, line))
            else:
                self.output.write("\n")


def createCodeIndenter(output):
    global _indenter
    _indenter = _IndentedCodeWriter(output)

def getIndenter():
    return _indenter

def write_code(string):
    _indenter.write(string)