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# -*- test-case-name: twisted.python.test.test_htmlizer -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
HTML rendering of Python source.
"""
from twisted.python.compat import _tokenize, escape
import tokenize, keyword
from . import reflect
from twisted.python._oldstyle import _oldStyle
@_oldStyle
class TokenPrinter:
"""
Format a stream of tokens and intermediate whitespace, for pretty-printing.
"""
currentCol, currentLine = 0, 1
lastIdentifier = parameters = 0
encoding = "utf-8"
def __init__(self, writer):
self.writer = writer
def printtoken(self, type, token, sCoordinates, eCoordinates, line):
if hasattr(tokenize, "ENCODING") and type == tokenize.ENCODING:
self.encoding = token
return
(srow, scol) = sCoordinates
(erow, ecol) = eCoordinates
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
@_oldStyle
class HTMLWriter:
"""
Write the stream of tokens and whitespace from L{TokenPrinter}, formating
tokens as HTML spans.
"""
noSpan = []
def __init__(self, writer):
self.writer = writer
noSpan = []
reflect.accumulateClassList(self.__class__, "noSpan", noSpan)
self.noSpan = noSpan
def write(self, token, type=None):
if isinstance(token, bytes):
token = token.decode("utf-8")
token = escape(token)
token = token.encode("utf-8")
if (type is None) or (type in self.noSpan):
self.writer(token)
else:
self.writer(
b'<span class="py-src-' + type.encode("utf-8") + b'">' +
token + b'</span>')
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(b'<pre>')
printer = TokenPrinter(writer(out.write).write).printtoken
try:
for token in _tokenize(inp.readline):
(tokenType, string, start, end, line) = token
printer(tokenType, string, start, end, line)
except tokenize.TokenError:
pass
out.write(b'</pre>\n')
def main():
import sys
stdout = getattr(sys.stdout, "buffer", sys.stdout)
with open(sys.argv[1], "rb") as f:
filter(f, stdout)
if __name__ == '__main__':
main()
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