|
|
# -*- coding: utf-8 -*-
|
|
|
"""
|
|
|
Class and program to colorize python source code for ANSI terminals.
|
|
|
|
|
|
Based on an HTML code highlighter by Jurgen Hermann found at:
|
|
|
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52298
|
|
|
|
|
|
Modifications by Fernando Perez (fperez@colorado.edu).
|
|
|
|
|
|
Information on the original HTML highlighter follows:
|
|
|
|
|
|
MoinMoin - Python Source Parser
|
|
|
|
|
|
Title: Colorize Python source using the built-in tokenizer
|
|
|
|
|
|
Submitter: Jurgen Hermann
|
|
|
Last Updated:2001/04/06
|
|
|
|
|
|
Version no:1.2
|
|
|
|
|
|
Description:
|
|
|
|
|
|
This code is part of MoinMoin (http://moin.sourceforge.net/) and converts
|
|
|
Python source code to HTML markup, rendering comments, keywords,
|
|
|
operators, numeric and string literals in different colors.
|
|
|
|
|
|
It shows how to use the built-in keyword, token and tokenize modules to
|
|
|
scan Python source code and re-emit it with no changes to its original
|
|
|
formatting (which is the hard part).
|
|
|
"""
|
|
|
from __future__ import print_function
|
|
|
|
|
|
from __future__ import unicode_literals
|
|
|
|
|
|
__all__ = ['ANSICodeColors','Parser']
|
|
|
|
|
|
_scheme_default = 'Linux'
|
|
|
|
|
|
|
|
|
# Imports
|
|
|
import StringIO
|
|
|
import keyword
|
|
|
import os
|
|
|
import sys
|
|
|
import token
|
|
|
import tokenize
|
|
|
|
|
|
try:
|
|
|
generate_tokens = tokenize.generate_tokens
|
|
|
except AttributeError:
|
|
|
# Python 3. Note that we use the undocumented _tokenize because it expects
|
|
|
# strings, not bytes. See also Python issue #9969.
|
|
|
generate_tokens = tokenize._tokenize
|
|
|
|
|
|
from IPython.utils.coloransi import *
|
|
|
|
|
|
#############################################################################
|
|
|
### Python Source Parser (does Hilighting)
|
|
|
#############################################################################
|
|
|
|
|
|
_KEYWORD = token.NT_OFFSET + 1
|
|
|
_TEXT = token.NT_OFFSET + 2
|
|
|
|
|
|
#****************************************************************************
|
|
|
# Builtin color schemes
|
|
|
|
|
|
Colors = TermColors # just a shorthand
|
|
|
|
|
|
# Build a few color schemes
|
|
|
NoColor = ColorScheme(
|
|
|
'NoColor',{
|
|
|
token.NUMBER : Colors.NoColor,
|
|
|
token.OP : Colors.NoColor,
|
|
|
token.STRING : Colors.NoColor,
|
|
|
tokenize.COMMENT : Colors.NoColor,
|
|
|
token.NAME : Colors.NoColor,
|
|
|
token.ERRORTOKEN : Colors.NoColor,
|
|
|
|
|
|
_KEYWORD : Colors.NoColor,
|
|
|
_TEXT : Colors.NoColor,
|
|
|
|
|
|
'normal' : Colors.NoColor # color off (usu. Colors.Normal)
|
|
|
} )
|
|
|
|
|
|
LinuxColors = ColorScheme(
|
|
|
'Linux',{
|
|
|
token.NUMBER : Colors.LightCyan,
|
|
|
token.OP : Colors.Yellow,
|
|
|
token.STRING : Colors.LightBlue,
|
|
|
tokenize.COMMENT : Colors.LightRed,
|
|
|
token.NAME : Colors.Normal,
|
|
|
token.ERRORTOKEN : Colors.Red,
|
|
|
|
|
|
_KEYWORD : Colors.LightGreen,
|
|
|
_TEXT : Colors.Yellow,
|
|
|
|
|
|
'normal' : Colors.Normal # color off (usu. Colors.Normal)
|
|
|
} )
|
|
|
|
|
|
LightBGColors = ColorScheme(
|
|
|
'LightBG',{
|
|
|
token.NUMBER : Colors.Cyan,
|
|
|
token.OP : Colors.Blue,
|
|
|
token.STRING : Colors.Blue,
|
|
|
tokenize.COMMENT : Colors.Red,
|
|
|
token.NAME : Colors.Normal,
|
|
|
token.ERRORTOKEN : Colors.Red,
|
|
|
|
|
|
_KEYWORD : Colors.Green,
|
|
|
_TEXT : Colors.Blue,
|
|
|
|
|
|
'normal' : Colors.Normal # color off (usu. Colors.Normal)
|
|
|
} )
|
|
|
|
|
|
# Build table of color schemes (needed by the parser)
|
|
|
ANSICodeColors = ColorSchemeTable([NoColor,LinuxColors,LightBGColors],
|
|
|
_scheme_default)
|
|
|
|
|
|
class Parser:
|
|
|
""" Format colored Python source.
|
|
|
"""
|
|
|
|
|
|
def __init__(self, color_table=None,out = sys.stdout):
|
|
|
""" Create a parser with a specified color table and output channel.
|
|
|
|
|
|
Call format() to process code.
|
|
|
"""
|
|
|
self.color_table = color_table and color_table or ANSICodeColors
|
|
|
self.out = out
|
|
|
|
|
|
def format(self, raw, out = None, scheme = ''):
|
|
|
return self.format2(raw, out, scheme)[0]
|
|
|
|
|
|
def format2(self, raw, out = None, scheme = ''):
|
|
|
""" Parse and send the colored source.
|
|
|
|
|
|
If out and scheme are not specified, the defaults (given to
|
|
|
constructor) are used.
|
|
|
|
|
|
out should be a file-type object. Optionally, out can be given as the
|
|
|
string 'str' and the parser will automatically return the output in a
|
|
|
string."""
|
|
|
|
|
|
string_output = 0
|
|
|
if out == 'str' or self.out == 'str' or \
|
|
|
isinstance(self.out,StringIO.StringIO):
|
|
|
# XXX - I don't really like this state handling logic, but at this
|
|
|
# point I don't want to make major changes, so adding the
|
|
|
# isinstance() check is the simplest I can do to ensure correct
|
|
|
# behavior.
|
|
|
out_old = self.out
|
|
|
self.out = StringIO.StringIO()
|
|
|
string_output = 1
|
|
|
elif out is not None:
|
|
|
self.out = out
|
|
|
|
|
|
# Fast return of the unmodified input for NoColor scheme
|
|
|
if scheme == 'NoColor':
|
|
|
error = False
|
|
|
self.out.write(raw)
|
|
|
if string_output:
|
|
|
return raw,error
|
|
|
else:
|
|
|
return None,error
|
|
|
|
|
|
# local shorthands
|
|
|
colors = self.color_table[scheme].colors
|
|
|
self.colors = colors # put in object so __call__ sees it
|
|
|
|
|
|
# Remove trailing whitespace and normalize tabs
|
|
|
self.raw = raw.expandtabs().rstrip()
|
|
|
|
|
|
# store line offsets in self.lines
|
|
|
self.lines = [0, 0]
|
|
|
pos = 0
|
|
|
raw_find = self.raw.find
|
|
|
lines_append = self.lines.append
|
|
|
while 1:
|
|
|
pos = raw_find('\n', pos) + 1
|
|
|
if not pos: break
|
|
|
lines_append(pos)
|
|
|
lines_append(len(self.raw))
|
|
|
|
|
|
# parse the source and write it
|
|
|
self.pos = 0
|
|
|
text = StringIO.StringIO(self.raw)
|
|
|
|
|
|
error = False
|
|
|
try:
|
|
|
for atoken in generate_tokens(text.readline):
|
|
|
self(*atoken)
|
|
|
except tokenize.TokenError as ex:
|
|
|
msg = ex.args[0]
|
|
|
line = ex.args[1][0]
|
|
|
self.out.write("%s\n\n*** ERROR: %s%s%s\n" %
|
|
|
(colors[token.ERRORTOKEN],
|
|
|
msg, self.raw[self.lines[line]:],
|
|
|
colors.normal)
|
|
|
)
|
|
|
error = True
|
|
|
self.out.write(colors.normal+'\n')
|
|
|
if string_output:
|
|
|
output = self.out.getvalue()
|
|
|
self.out = out_old
|
|
|
return (output, error)
|
|
|
return (None, error)
|
|
|
|
|
|
def __call__(self, toktype, toktext, start_pos, end_pos, line):
|
|
|
""" Token handler, with syntax highlighting."""
|
|
|
(srow,scol) = start_pos
|
|
|
(erow,ecol) = end_pos
|
|
|
colors = self.colors
|
|
|
owrite = self.out.write
|
|
|
|
|
|
# line separator, so this works across platforms
|
|
|
linesep = os.linesep
|
|
|
|
|
|
# calculate new positions
|
|
|
oldpos = self.pos
|
|
|
newpos = self.lines[srow] + scol
|
|
|
self.pos = newpos + len(toktext)
|
|
|
|
|
|
# send the original whitespace, if needed
|
|
|
if newpos > oldpos:
|
|
|
owrite(self.raw[oldpos:newpos])
|
|
|
|
|
|
# skip indenting tokens
|
|
|
if toktype in [token.INDENT, token.DEDENT]:
|
|
|
self.pos = newpos
|
|
|
return
|
|
|
|
|
|
# map token type to a color group
|
|
|
if token.LPAR <= toktype and toktype <= token.OP:
|
|
|
toktype = token.OP
|
|
|
elif toktype == token.NAME and keyword.iskeyword(toktext):
|
|
|
toktype = _KEYWORD
|
|
|
color = colors.get(toktype, colors[_TEXT])
|
|
|
|
|
|
#print '<%s>' % toktext, # dbg
|
|
|
|
|
|
# Triple quoted strings must be handled carefully so that backtracking
|
|
|
# in pagers works correctly. We need color terminators on _each_ line.
|
|
|
if linesep in toktext:
|
|
|
toktext = toktext.replace(linesep, '%s%s%s' %
|
|
|
(colors.normal,linesep,color))
|
|
|
|
|
|
# send text
|
|
|
owrite('%s%s%s' % (color,toktext,colors.normal))
|
|
|
|
|
|
def main(argv=None):
|
|
|
"""Run as a command-line script: colorize a python file or stdin using ANSI
|
|
|
color escapes and print to stdout.
|
|
|
|
|
|
Inputs:
|
|
|
|
|
|
- argv(None): a list of strings like sys.argv[1:] giving the command-line
|
|
|
arguments. If None, use sys.argv[1:].
|
|
|
"""
|
|
|
|
|
|
usage_msg = """%prog [options] [filename]
|
|
|
|
|
|
Colorize a python file or stdin using ANSI color escapes and print to stdout.
|
|
|
If no filename is given, or if filename is -, read standard input."""
|
|
|
|
|
|
import optparse
|
|
|
parser = optparse.OptionParser(usage=usage_msg)
|
|
|
newopt = parser.add_option
|
|
|
newopt('-s','--scheme',metavar='NAME',dest='scheme_name',action='store',
|
|
|
choices=['Linux','LightBG','NoColor'],default=_scheme_default,
|
|
|
help="give the color scheme to use. Currently only 'Linux'\
|
|
|
(default) and 'LightBG' and 'NoColor' are implemented (give without\
|
|
|
quotes)")
|
|
|
|
|
|
opts,args = parser.parse_args(argv)
|
|
|
|
|
|
if len(args) > 1:
|
|
|
parser.error("you must give at most one filename.")
|
|
|
|
|
|
if len(args) == 0:
|
|
|
fname = '-' # no filename given; setup to read from stdin
|
|
|
else:
|
|
|
fname = args[0]
|
|
|
|
|
|
if fname == '-':
|
|
|
stream = sys.stdin
|
|
|
else:
|
|
|
try:
|
|
|
stream = open(fname)
|
|
|
except IOError as msg:
|
|
|
print(msg, file=sys.stderr)
|
|
|
sys.exit(1)
|
|
|
|
|
|
parser = Parser()
|
|
|
|
|
|
# we need nested try blocks because pre-2.5 python doesn't support unified
|
|
|
# try-except-finally
|
|
|
try:
|
|
|
try:
|
|
|
# write colorized version to stdout
|
|
|
parser.format(stream.read(),scheme=opts.scheme_name)
|
|
|
except IOError as msg:
|
|
|
# if user reads through a pager and quits, don't print traceback
|
|
|
if msg.args != (32,'Broken pipe'):
|
|
|
raise
|
|
|
finally:
|
|
|
if stream is not sys.stdin:
|
|
|
stream.close() # in case a non-handled exception happened above
|
|
|
|
|
|
if __name__ == "__main__":
|
|
|
main()
|
|
|
|
