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#!/usr/bin/python

r"""
==============
smartypants.py
==============

----------------------------
SmartyPants ported to Python
----------------------------

Ported by `Chad Miller`_
Copyright (c) 2004, 2007 Chad Miller

original `SmartyPants`_ by `John Gruber`_
Copyright (c) 2003 John Gruber


Synopsis
========

A smart-quotes plugin for Pyblosxom_.

The priginal "SmartyPants" is a free web publishing plug-in for Movable Type,
Blosxom, and BBEdit that easily translates plain ASCII punctuation characters
into "smart" typographic punctuation HTML entities.

This software, *smartypants.py*, endeavours to be a functional port of
SmartyPants to Python, for use with Pyblosxom_.


Description
===========

SmartyPants can perform the following transformations:

- Straight quotes ( " and ' ) into "curly" quote HTML entities
- Backticks-style quotes (\`\`like this'') into "curly" quote HTML entities
- Dashes (``--`` and ``---``) into en- and em-dash entities
- Three consecutive dots (``...`` or ``. . .``) into an ellipsis entity

This means you can write, edit, and save your posts using plain old
ASCII straight quotes, plain dashes, and plain dots, but your published
posts (and final HTML output) will appear with smart quotes, em-dashes,
and proper ellipses.

SmartyPants does not modify characters within ``<pre>``, ``<code>``, ``<kbd>``,
``<math>`` or ``<script>`` tag blocks. Typically, these tags are used to
display text where smart quotes and other "smart punctuation" would not be
appropriate, such as source code or example markup.


Backslash Escapes
=================

If you need to use literal straight quotes (or plain hyphens and
periods), SmartyPants accepts the following backslash escape sequences
to force non-smart punctuation. It does so by transforming the escape
sequence into a decimal-encoded HTML entity:

(FIXME:  table here.)

.. comment    It sucks that there's a disconnect between the visual layout and table markup when special characters are involved.
.. comment ======  =====  =========
.. comment Escape  Value  Character
.. comment ======  =====  =========
.. comment \\\\\\\\    &#92;  \\\\
.. comment \\\\"     &#34;  "
.. comment \\\\'     &#39;  '
.. comment \\\\.     &#46;  .
.. comment \\\\-     &#45;  \-
.. comment \\\\`     &#96;  \`
.. comment ======  =====  =========

This is useful, for example, when you want to use straight quotes as
foot and inch marks: 6'2" tall; a 17" iMac.

Options
=======

For Pyblosxom users, the ``smartypants_attributes`` attribute is where you
specify configuration options. 

Numeric values are the easiest way to configure SmartyPants' behavior:

"0"
	Suppress all transformations. (Do nothing.)
"1" 
	Performs default SmartyPants transformations: quotes (including
	\`\`backticks'' -style), em-dashes, and ellipses. "``--``" (dash dash)
	is used to signify an em-dash; there is no support for en-dashes.

"2"
	Same as smarty_pants="1", except that it uses the old-school typewriter
	shorthand for dashes:  "``--``" (dash dash) for en-dashes, "``---``"
	(dash dash dash)
	for em-dashes.

"3"
	Same as smarty_pants="2", but inverts the shorthand for dashes:
	"``--``" (dash dash) for em-dashes, and "``---``" (dash dash dash) for
	en-dashes.

"-1"
	Stupefy mode. Reverses the SmartyPants transformation process, turning
	the HTML entities produced by SmartyPants into their ASCII equivalents.
	E.g.  "&#8220;" is turned into a simple double-quote ("), "&#8212;" is
	turned into two dashes, etc.


The following single-character attribute values can be combined to toggle
individual transformations from within the smarty_pants attribute. For
example, to educate normal quotes and em-dashes, but not ellipses or
\`\`backticks'' -style quotes:

``py['smartypants_attributes'] = "1"``

"q"
	Educates normal quote characters: (") and (').

"b"
	Educates \`\`backticks'' -style double quotes.

"B"
	Educates \`\`backticks'' -style double quotes and \`single' quotes.

"d"
	Educates em-dashes.

"D"
	Educates em-dashes and en-dashes, using old-school typewriter shorthand:
	(dash dash) for en-dashes, (dash dash dash) for em-dashes.

"i"
	Educates em-dashes and en-dashes, using inverted old-school typewriter
	shorthand: (dash dash) for em-dashes, (dash dash dash) for en-dashes.

"e"
	Educates ellipses.

"w"
	Translates any instance of ``&quot;`` into a normal double-quote character.
	This should be of no interest to most people, but of particular interest
	to anyone who writes their posts using Dreamweaver, as Dreamweaver
	inexplicably uses this entity to represent a literal double-quote
	character. SmartyPants only educates normal quotes, not entities (because
	ordinarily, entities are used for the explicit purpose of representing the
	specific character they represent). The "w" option must be used in
	conjunction with one (or both) of the other quote options ("q" or "b").
	Thus, if you wish to apply all SmartyPants transformations (quotes, en-
	and em-dashes, and ellipses) and also translate ``&quot;`` entities into
	regular quotes so SmartyPants can educate them, you should pass the
	following to the smarty_pants attribute:

The ``smartypants_forbidden_flavours`` list contains pyblosxom flavours for 
which no Smarty Pants rendering will occur.


Caveats
=======

Why You Might Not Want to Use Smart Quotes in Your Weblog
---------------------------------------------------------

For one thing, you might not care.

Most normal, mentally stable individuals do not take notice of proper
typographic punctuation. Many design and typography nerds, however, break
out in a nasty rash when they encounter, say, a restaurant sign that uses
a straight apostrophe to spell "Joe's".

If you're the sort of person who just doesn't care, you might well want to
continue not caring. Using straight quotes -- and sticking to the 7-bit
ASCII character set in general -- is certainly a simpler way to live.

Even if you I *do* care about accurate typography, you still might want to
think twice before educating the quote characters in your weblog. One side
effect of publishing curly quote HTML entities is that it makes your
weblog a bit harder for others to quote from using copy-and-paste. What
happens is that when someone copies text from your blog, the copied text
contains the 8-bit curly quote characters (as well as the 8-bit characters
for em-dashes and ellipses, if you use these options). These characters
are not standard across different text encoding methods, which is why they
need to be encoded as HTML entities.

People copying text from your weblog, however, may not notice that you're
using curly quotes, and they'll go ahead and paste the unencoded 8-bit
characters copied from their browser into an email message or their own
weblog. When pasted as raw "smart quotes", these characters are likely to
get mangled beyond recognition.

That said, my own opinion is that any decent text editor or email client
makes it easy to stupefy smart quote characters into their 7-bit
equivalents, and I don't consider it my problem if you're using an
indecent text editor or email client.


Algorithmic Shortcomings
------------------------

One situation in which quotes will get curled the wrong way is when
apostrophes are used at the start of leading contractions. For example:

``'Twas the night before Christmas.``

In the case above, SmartyPants will turn the apostrophe into an opening
single-quote, when in fact it should be a closing one. I don't think
this problem can be solved in the general case -- every word processor
I've tried gets this wrong as well. In such cases, it's best to use the
proper HTML entity for closing single-quotes (``&#8217;``) by hand.


Bugs
====

To file bug reports or feature requests (other than topics listed in the
Caveats section above) please send email to: mailto:smartypantspy@chad.org

If the bug involves quotes being curled the wrong way, please send example
text to illustrate.

To Do list
----------

- Provide a function for use within templates to quote anything at all.


Version History
===============

1.5_1.6: Fri, 27 Jul 2007 07:06:40 -0400
	- Fixed bug where blocks of precious unalterable text was instead
	  interpreted.  Thanks to Le Roux and Dirk van Oosterbosch.
	
1.5_1.5: Sat, 13 Aug 2005 15:50:24 -0400
	- Fix bogus magical quotation when there is no hint that the 
	  user wants it, e.g., in "21st century".  Thanks to Nathan Hamblen.
	- Be smarter about quotes before terminating numbers in an en-dash'ed
	  range.

1.5_1.4: Thu, 10 Feb 2005 20:24:36 -0500
	- Fix a date-processing bug, as reported by jacob childress.
	- Begin a test-suite for ensuring correct output.
	- Removed import of "string", since I didn't really need it.
	  (This was my first every Python program.  Sue me!)

1.5_1.3: Wed, 15 Sep 2004 18:25:58 -0400
	- Abort processing if the flavour is in forbidden-list.  Default of 
	  [ "rss" ]   (Idea of Wolfgang SCHNERRING.)
	- Remove stray virgules from en-dashes.  Patch by Wolfgang SCHNERRING.

1.5_1.2: Mon, 24 May 2004 08:14:54 -0400
	- Some single quotes weren't replaced properly.  Diff-tesuji played
	  by Benjamin GEIGER.

1.5_1.1: Sun, 14 Mar 2004 14:38:28 -0500
	- Support upcoming pyblosxom 0.9 plugin verification feature.

1.5_1.0: Tue, 09 Mar 2004 08:08:35 -0500
	- Initial release

Version Information
-------------------

Version numbers will track the SmartyPants_ version numbers, with the addition
of an underscore and the smartypants.py version on the end.

New versions will be available at `http://wiki.chad.org/SmartyPantsPy`_

.. _http://wiki.chad.org/SmartyPantsPy: http://wiki.chad.org/SmartyPantsPy

Authors
=======

`John Gruber`_ did all of the hard work of writing this software in Perl for
`Movable Type`_ and almost all of this useful documentation.  `Chad Miller`_
ported it to Python to use with Pyblosxom_.


Additional Credits
==================

Portions of the SmartyPants original work are based on Brad Choate's nifty
MTRegex plug-in.  `Brad Choate`_ also contributed a few bits of source code to
this plug-in.  Brad Choate is a fine hacker indeed.

`Jeremy Hedley`_ and `Charles Wiltgen`_ deserve mention for exemplary beta
testing of the original SmartyPants.

`Rael Dornfest`_ ported SmartyPants to Blosxom.

.. _Brad Choate: http://bradchoate.com/
.. _Jeremy Hedley: http://antipixel.com/
.. _Charles Wiltgen: http://playbacktime.com/
.. _Rael Dornfest: http://raelity.org/


Copyright and License
=====================

SmartyPants_ license::

	Copyright (c) 2003 John Gruber
	(http://daringfireball.net/)
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are
	met:

	*   Redistributions of source code must retain the above copyright
		notice, this list of conditions and the following disclaimer.

	*   Redistributions in binary form must reproduce the above copyright
		notice, this list of conditions and the following disclaimer in
		the documentation and/or other materials provided with the
		distribution.

	*   Neither the name "SmartyPants" nor the names of its contributors 
		may be used to endorse or promote products derived from this
		software without specific prior written permission.

	This software is provided by the copyright holders and contributors "as
	is" and any express or implied warranties, including, but not limited
	to, the implied warranties of merchantability and fitness for a
	particular purpose are disclaimed. In no event shall the copyright
	owner or contributors be liable for any direct, indirect, incidental,
	special, exemplary, or consequential damages (including, but not
	limited to, procurement of substitute goods or services; loss of use,
	data, or profits; or business interruption) however caused and on any
	theory of liability, whether in contract, strict liability, or tort
	(including negligence or otherwise) arising in any way out of the use
	of this software, even if advised of the possibility of such damage.


smartypants.py license::

	smartypants.py is a derivative work of SmartyPants.
	
	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are
	met:

	*   Redistributions of source code must retain the above copyright
		notice, this list of conditions and the following disclaimer.

	*   Redistributions in binary form must reproduce the above copyright
		notice, this list of conditions and the following disclaimer in
		the documentation and/or other materials provided with the
		distribution.

	This software is provided by the copyright holders and contributors "as
	is" and any express or implied warranties, including, but not limited
	to, the implied warranties of merchantability and fitness for a
	particular purpose are disclaimed. In no event shall the copyright
	owner or contributors be liable for any direct, indirect, incidental,
	special, exemplary, or consequential damages (including, but not
	limited to, procurement of substitute goods or services; loss of use,
	data, or profits; or business interruption) however caused and on any
	theory of liability, whether in contract, strict liability, or tort
	(including negligence or otherwise) arising in any way out of the use
	of this software, even if advised of the possibility of such damage.



.. _John Gruber: http://daringfireball.net/
.. _Chad Miller: http://web.chad.org/

.. _Pyblosxom: http://roughingit.subtlehints.net/pyblosxom
.. _SmartyPants: http://daringfireball.net/projects/smartypants/
.. _Movable Type: http://www.movabletype.org/

"""

default_smartypants_attr = "1"

import re

tags_to_skip_regex = re.compile(r"<(/)?(pre|code|kbd|script|math)[^>]*>", re.I)


def verify_installation(request):
	return 1
	# assert the plugin is functional


def cb_story(args):
	global default_smartypants_attr

	try:
		forbidden_flavours = args["entry"]["smartypants_forbidden_flavours"]
	except KeyError:
		forbidden_flavours = [ "rss" ]

	try:
		attributes = args["entry"]["smartypants_attributes"]
	except KeyError:
		attributes = default_smartypants_attr

	if attributes is None:
		attributes = default_smartypants_attr

	entryData = args["entry"].getData()

	try:
		if args["request"]["flavour"] in forbidden_flavours:
			return
	except KeyError:
		if "&lt;" in args["entry"]["body"][0:15]:  # sniff the stream
			return  # abort if it looks like escaped HTML.  FIXME

	# FIXME: make these configurable, perhaps?
	args["entry"]["body"] = smartyPants(entryData, attributes)
	args["entry"]["title"] = smartyPants(args["entry"]["title"], attributes)


### interal functions below here

def smartyPants(text, attr=default_smartypants_attr):
	convert_quot = False  # should we translate &quot; entities into normal quotes?

	# Parse attributes:
	# 0 : do nothing
	# 1 : set all
	# 2 : set all, using old school en- and em- dash shortcuts
	# 3 : set all, using inverted old school en and em- dash shortcuts
	# 
	# q : quotes
	# b : backtick quotes (``double'' only)
	# B : backtick quotes (``double'' and `single')
	# d : dashes
	# D : old school dashes
	# i : inverted old school dashes
	# e : ellipses
	# w : convert &quot; entities to " for Dreamweaver users

	skipped_tag_stack = []
	do_dashes = "0"
	do_backticks = "0"
	do_quotes = "0"
	do_ellipses = "0"
	do_stupefy = "0"

	if attr == "0":
		# Do nothing.
		return text
	elif attr == "1":
		do_quotes    = "1"
		do_backticks = "1"
		do_dashes    = "1"
		do_ellipses  = "1"
	elif attr == "2":
		# Do everything, turn all options on, use old school dash shorthand.
		do_quotes    = "1"
		do_backticks = "1"
		do_dashes    = "2"
		do_ellipses  = "1"
	elif attr == "3":
		# Do everything, turn all options on, use inverted old school dash shorthand.
		do_quotes    = "1"
		do_backticks = "1"
		do_dashes    = "3"
		do_ellipses  = "1"
	elif attr == "-1":
		# Special "stupefy" mode.
		do_stupefy   = "1"
	else:
		for c in attr:
			if c == "q": do_quotes = "1"
			elif c == "b": do_backticks = "1"
			elif c == "B": do_backticks = "2"
			elif c == "d": do_dashes = "1"
			elif c == "D": do_dashes = "2"
			elif c == "i": do_dashes = "3"
			elif c == "e": do_ellipses = "1"
			elif c == "w": convert_quot = "1"
			else:
				pass
				# ignore unknown option

	tokens = _tokenize(text)
	result = []
	in_pre = False

	prev_token_last_char = ""
	# This is a cheat, used to get some context
	# for one-character tokens that consist of 
	# just a quote char. What we do is remember
	# the last character of the previous text
	# token, to use as context to curl single-
	# character quote tokens correctly.

	for cur_token in tokens:
		if cur_token[0] == "tag":
			# Don't mess with quotes inside some tags.  This does not handle self <closing/> tags!
			result.append(cur_token[1])
			skip_match = tags_to_skip_regex.match(cur_token[1])
			if skip_match is not None:
				if not skip_match.group(1):
					skipped_tag_stack.append(skip_match.group(2).lower())
					in_pre = True
				else:
					if len(skipped_tag_stack) > 0:
						if skip_match.group(2).lower() == skipped_tag_stack[-1]:
							skipped_tag_stack.pop()
						else:
							pass
							# This close doesn't match the open.  This isn't XHTML.  We should barf here.
					if len(skipped_tag_stack) == 0:
						in_pre = False
		else:
			t = cur_token[1]
			last_char = t[-1:] # Remember last char of this token before processing.
			if not in_pre:
				oldstr = t
				t = processEscapes(t)

				if convert_quot != "0":
					t = re.sub('&quot;', '"', t)

				if do_dashes != "0":
					if do_dashes == "1":
						t = educateDashes(t)
					if do_dashes == "2":
						t = educateDashesOldSchool(t)
					if do_dashes == "3":
						t = educateDashesOldSchoolInverted(t)

				if do_ellipses != "0":
					t = educateEllipses(t)

				# Note: backticks need to be processed before quotes.
				if do_backticks != "0":
					t = educateBackticks(t)

				if do_backticks == "2":
					t = educateSingleBackticks(t)

				if do_quotes != "0":
					if t == "'":
						# Special case: single-character ' token
						if re.match("\S", prev_token_last_char):
							t = "&#8217;"
						else:
							t = "&#8216;"
					elif t == '"':
						# Special case: single-character " token
						if re.match("\S", prev_token_last_char):
							t = "&#8221;"
						else:
							t = "&#8220;"

					else:
						# Normal case:
						t = educateQuotes(t)

				if do_stupefy == "1":
					t = stupefyEntities(t)

			prev_token_last_char = last_char
			result.append(t)

	return "".join(result)


def educateQuotes(str):
	"""
	Parameter:  String.
	
	Returns:	The string, with "educated" curly quote HTML entities.
	
	Example input:  "Isn't this fun?"
	Example output: &#8220;Isn&#8217;t this fun?&#8221;
	"""

	oldstr = str
	punct_class = r"""[!"#\$\%'()*+,-.\/:;<=>?\@\[\\\]\^_`{|}~]"""

	# Special case if the very first character is a quote
	# followed by punctuation at a non-word-break. Close the quotes by brute force:
	str = re.sub(r"""^'(?=%s\\B)""" % (punct_class,), r"""&#8217;""", str)
	str = re.sub(r"""^"(?=%s\\B)""" % (punct_class,), r"""&#8221;""", str)

	# Special case for double sets of quotes, e.g.:
	#   <p>He said, "'Quoted' words in a larger quote."</p>
	str = re.sub(r""""'(?=\w)""", """&#8220;&#8216;""", str)
	str = re.sub(r"""'"(?=\w)""", """&#8216;&#8220;""", str)

	# Special case for decade abbreviations (the '80s):
	str = re.sub(r"""\b'(?=\d{2}s)""", r"""&#8217;""", str)

	close_class = r"""[^\ \t\r\n\[\{\(\-]"""
	dec_dashes = r"""&#8211;|&#8212;"""

	# Get most opening single quotes:
	opening_single_quotes_regex = re.compile(r"""
			(
				\s          |   # a whitespace char, or
				&nbsp;      |   # a non-breaking space entity, or
				--          |   # dashes, or
				&[mn]dash;  |   # named dash entities
				%s          |   # or decimal entities
				&\#x201[34];    # or hex
			)
			'                 # the quote
			(?=\w)            # followed by a word character
			""" % (dec_dashes,), re.VERBOSE)
	str = opening_single_quotes_regex.sub(r"""\1&#8216;""", str)

	closing_single_quotes_regex = re.compile(r"""
			(%s)
			'
			(?!\s | s\b | \d)
			""" % (close_class,), re.VERBOSE)
	str = closing_single_quotes_regex.sub(r"""\1&#8217;""", str)

	closing_single_quotes_regex = re.compile(r"""
			(%s)
			'
			(\s | s\b)
			""" % (close_class,), re.VERBOSE)
	str = closing_single_quotes_regex.sub(r"""\1&#8217;\2""", str)

	# Any remaining single quotes should be opening ones:
	str = re.sub(r"""'""", r"""&#8216;""", str)

	# Get most opening double quotes:
	opening_double_quotes_regex = re.compile(r"""
			(
				\s          |   # a whitespace char, or
				&nbsp;      |   # a non-breaking space entity, or
				--          |   # dashes, or
				&[mn]dash;  |   # named dash entities
				%s          |   # or decimal entities
				&\#x201[34];    # or hex
			)
			"                 # the quote
			(?=\w)            # followed by a word character
			""" % (dec_dashes,), re.VERBOSE)
	str = opening_double_quotes_regex.sub(r"""\1&#8220;""", str)

	# Double closing quotes:
	closing_double_quotes_regex = re.compile(r"""
			#(%s)?   # character that indicates the quote should be closing
			"
			(?=\s)
			""" % (close_class,), re.VERBOSE)
	str = closing_double_quotes_regex.sub(r"""&#8221;""", str)

	closing_double_quotes_regex = re.compile(r"""
			(%s)   # character that indicates the quote should be closing
			"
			""" % (close_class,), re.VERBOSE)
	str = closing_double_quotes_regex.sub(r"""\1&#8221;""", str)

	# Any remaining quotes should be opening ones.
	str = re.sub(r'"', r"""&#8220;""", str)

	return str


def educateBackticks(str):
	"""
	Parameter:  String.
	Returns:    The string, with ``backticks'' -style double quotes
	            translated into HTML curly quote entities.
	Example input:  ``Isn't this fun?''
	Example output: &#8220;Isn't this fun?&#8221;
	"""

	str = re.sub(r"""``""", r"""&#8220;""", str)
	str = re.sub(r"""''""", r"""&#8221;""", str)
	return str


def educateSingleBackticks(str):
	"""
	Parameter:  String.
	Returns:    The string, with `backticks' -style single quotes
	            translated into HTML curly quote entities.
	
	Example input:  `Isn't this fun?'
	Example output: &#8216;Isn&#8217;t this fun?&#8217;
	"""

	str = re.sub(r"""`""", r"""&#8216;""", str)
	str = re.sub(r"""'""", r"""&#8217;""", str)
	return str


def educateDashes(str):
	"""
	Parameter:  String.
	
	Returns:    The string, with each instance of "--" translated to
	            an em-dash HTML entity.
	"""

	str = re.sub(r"""---""", r"""&#8211;""", str) # en  (yes, backwards)
	str = re.sub(r"""--""", r"""&#8212;""", str) # em (yes, backwards)
	return str


def educateDashesOldSchool(str):
	"""
	Parameter:  String.
	
	Returns:    The string, with each instance of "--" translated to
	            an en-dash HTML entity, and each "---" translated to
	            an em-dash HTML entity.
	"""

	str = re.sub(r"""---""", r"""&#8212;""", str)    # em (yes, backwards)
	str = re.sub(r"""--""", r"""&#8211;""", str)    # en (yes, backwards)
	return str


def educateDashesOldSchoolInverted(str):
	"""
	Parameter:  String.
	
	Returns:    The string, with each instance of "--" translated to
	            an em-dash HTML entity, and each "---" translated to
	            an en-dash HTML entity. Two reasons why: First, unlike the
	            en- and em-dash syntax supported by
	            EducateDashesOldSchool(), it's compatible with existing
	            entries written before SmartyPants 1.1, back when "--" was
	            only used for em-dashes.  Second, em-dashes are more
	            common than en-dashes, and so it sort of makes sense that
	            the shortcut should be shorter to type. (Thanks to Aaron
	            Swartz for the idea.)
	"""
	str = re.sub(r"""---""", r"""&#8211;""", str)    # em
	str = re.sub(r"""--""", r"""&#8212;""", str)    # en
	return str



def educateEllipses(str):
	"""
	Parameter:  String.
	Returns:    The string, with each instance of "..." translated to
	            an ellipsis HTML entity.
	
	Example input:  Huh...?
	Example output: Huh&#8230;?
	"""

	str = re.sub(r"""\.\.\.""", r"""&#8230;""", str)
	str = re.sub(r"""\. \. \.""", r"""&#8230;""", str)
	return str


def stupefyEntities(str):
	"""
	Parameter:  String.
	Returns:    The string, with each SmartyPants HTML entity translated to
	            its ASCII counterpart.

	Example input:  &#8220;Hello &#8212; world.&#8221;
	Example output: "Hello -- world."
	"""

	str = re.sub(r"""&#8211;""", r"""-""", str)  # en-dash
	str = re.sub(r"""&#8212;""", r"""--""", str) # em-dash

	str = re.sub(r"""&#8216;""", r"""'""", str)  # open single quote
	str = re.sub(r"""&#8217;""", r"""'""", str)  # close single quote

	str = re.sub(r"""&#8220;""", r'''"''', str)  # open double quote
	str = re.sub(r"""&#8221;""", r'''"''', str)  # close double quote

	str = re.sub(r"""&#8230;""", r"""...""", str)# ellipsis

	return str


def processEscapes(str):
	r"""
	Parameter:  String.
	Returns:    The string, with after processing the following backslash
	            escape sequences. This is useful if you want to force a "dumb"
	            quote or other character to appear.
	
	            Escape  Value
	            ------  -----
	            \\      &#92;
	            \"      &#34;
	            \'      &#39;
	            \.      &#46;
	            \-      &#45;
	            \`      &#96;
	"""
	str = re.sub(r"""\\\\""", r"""&#92;""", str)
	str = re.sub(r'''\\"''', r"""&#34;""", str)
	str = re.sub(r"""\\'""", r"""&#39;""", str)
	str = re.sub(r"""\\\.""", r"""&#46;""", str)
	str = re.sub(r"""\\-""", r"""&#45;""", str)
	str = re.sub(r"""\\`""", r"""&#96;""", str)

	return str


def _tokenize(str):
	"""
	Parameter:  String containing HTML markup.
	Returns:    Reference to an array of the tokens comprising the input
	            string. Each token is either a tag (possibly with nested,
	            tags contained therein, such as <a href="<MTFoo>">, or a
	            run of text between tags. Each element of the array is a
	            two-element array; the first is either 'tag' or 'text';
	            the second is the actual value.
	
	Based on the _tokenize() subroutine from Brad Choate's MTRegex plugin.
	    <http://www.bradchoate.com/past/mtregex.php>
	"""

	pos = 0
	length = len(str)
	tokens = []

	depth = 6
	nested_tags = "|".join(['(?:<(?:[^<>]',] * depth) + (')*>)' * depth)
	#match = r"""(?: <! ( -- .*? -- \s* )+ > ) |  # comments
	#		(?: <\? .*? \?> ) |  # directives
	#		%s  # nested tags       """ % (nested_tags,)
	tag_soup = re.compile(r"""([^<]*)(<[^>]*>)""")

	token_match = tag_soup.search(str)

	previous_end = 0
	while token_match is not None:
		if token_match.group(1):
			tokens.append(['text', token_match.group(1)])

		tokens.append(['tag', token_match.group(2)])

		previous_end = token_match.end()
		token_match = tag_soup.search(str, token_match.end())

	if previous_end < len(str):
		tokens.append(['text', str[previous_end:]])

	return tokens



if __name__ == "__main__":

	import locale

	try:
		locale.setlocale(locale.LC_ALL, '')
	except:
		pass

	from docutils.core import publish_string
	docstring_html = publish_string(__doc__, writer_name='html')

	print docstring_html


	# Unit test output goes out stderr.  No worries.
	import unittest
	sp = smartyPants

	class TestSmartypantsAllAttributes(unittest.TestCase):
		# the default attribute is "1", which means "all".

		def test_dates(self):
			self.assertEqual(sp("1440-80's"), "1440-80&#8217;s")
			self.assertEqual(sp("1440-'80s"), "1440-&#8216;80s")
			self.assertEqual(sp("1440---'80s"), "1440&#8211;&#8216;80s")
			self.assertEqual(sp("1960s"), "1960s")  # no effect.
			self.assertEqual(sp("1960's"), "1960&#8217;s")
			self.assertEqual(sp("one two '60s"), "one two &#8216;60s")
			self.assertEqual(sp("'60s"), "&#8216;60s")

		def test_skip_tags(self):
			self.assertEqual(
				sp("""<script type="text/javascript">\n<!--\nvar href = "http://www.google.com";\nvar linktext = "google";\ndocument.write('<a href="' + href + '">' + linktext + "</a>");\n//-->\n</script>"""), 
				   """<script type="text/javascript">\n<!--\nvar href = "http://www.google.com";\nvar linktext = "google";\ndocument.write('<a href="' + href + '">' + linktext + "</a>");\n//-->\n</script>""")
			self.assertEqual(
				sp("""<p>He said &quot;Let's write some code.&quot; This code here <code>if True:\n\tprint &quot;Okay&quot;</code> is python code.</p>"""), 
				   """<p>He said &#8220;Let&#8217;s write some code.&#8221; This code here <code>if True:\n\tprint &quot;Okay&quot;</code> is python code.</p>""")


		def test_ordinal_numbers(self):
			self.assertEqual(sp("21st century"), "21st century")  # no effect.
			self.assertEqual(sp("3rd"), "3rd")  # no effect.

		def test_educated_quotes(self):
			self.assertEqual(sp('''"Isn't this fun?"'''), '''&#8220;Isn&#8217;t this fun?&#8221;''')

	unittest.main()




__author__ = "Chad Miller <smartypantspy@chad.org>"
__version__ = "1.5_1.6: Fri, 27 Jul 2007 07:06:40 -0400"
__url__ = "http://wiki.chad.org/SmartyPantsPy"
__description__ = "Smart-quotes, smart-ellipses, and smart-dashes for weblog entries in pyblosxom"