# -*- test-case-name: twisted.python.test.test_htmlizer -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
HTML rendering of Python source.
"""

import tokenize, cgi, keyword
import reflect

class TokenPrinter:

currentCol, currentLine = 0, 1
lastIdentifier = parameters = 0

def __init__(self, writer):
self.writer = writer

def printtoken(self, type, token, (srow, scol), (erow, ecol), line):
#print "printtoken(%r,%r,%r,(%r,%r),(%r,%r),%r), row=%r,col=%r" % (
# self, type, token, srow,scol, erow,ecol, line,
# self.currentLine, self.currentCol)
if self.currentLine < srow:
self.writer('\n'*(srow-self.currentLine))
self.currentLine, self.currentCol = srow, 0
self.writer(' '*(scol-self.currentCol))
if self.lastIdentifier:
type = "identifier"
self.parameters = 1
elif type == tokenize.NAME:
if keyword.iskeyword(token):
type = 'keyword'
else:
if self.parameters:
type = 'parameter'
else:
type = 'variable'
else:
type = tokenize.tok_name.get(type).lower()
self.writer(token, type)
self.currentCol = ecol
self.currentLine += token.count('\n')
if self.currentLine != erow:
self.currentCol = 0
self.lastIdentifier = token in ('def', 'class')
if token == ':':
self.parameters = 0


class HTMLWriter:

noSpan = []

def __init__(self, writer):
self.writer = writer
noSpan = []
reflect.accumulateClassList(self.__class__, "noSpan", noSpan)
self.noSpan = noSpan

def write(self, token, type=None):
token = cgi.escape(token)
if (type is None) or (type in self.noSpan):
self.writer(token)
else:
self.writer('<span class="py-src-%s">%s</span>' %
(type, token))


class SmallerHTMLWriter(HTMLWriter):
"""HTMLWriter that doesn't generate spans for some junk.

Results in much smaller HTML output.
"""
noSpan = ["endmarker", "indent", "dedent", "op", "newline", "nl"]

def filter(inp, out, writer=HTMLWriter):
out.write('<pre>')
printer = TokenPrinter(writer(out.write).write).printtoken
try:
tokenize.tokenize(inp.readline, printer)
except tokenize.TokenError:
pass
out.write('</pre>\n')

def main():
import sys
filter(open(sys.argv[1]), sys.stdout)

if __name__ == '__main__':
main()