1# markdown is released under the BSD license 2# Copyright 2007, 2008 The Python Markdown Project (v. 1.7 and later) 3# Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b) 4# Copyright 2004 Manfred Stienstra (the original version) 5# 6# All rights reserved. 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions are met: 10# 11# * Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# * Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# * Neither the name of the <organization> nor the 17# names of its contributors may be used to endorse or promote products 18# derived from this software without specific prior written permission. 19# 20# THIS SOFTWARE IS PROVIDED BY THE PYTHON MARKDOWN PROJECT ''AS IS'' AND ANY 21# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23# DISCLAIMED. IN NO EVENT SHALL ANY CONTRIBUTORS TO THE PYTHON MARKDOWN PROJECT 24# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30# POSSIBILITY OF SUCH DAMAGE. 31 32 33''' 34Smart_Strong Extension for Python-Markdown 35========================================== 36 37This extention adds smarter handling of double underscores within words. 38 39Simple Usage: 40 41 >>> import markdown 42 >>> print markdown.markdown('Text with double__underscore__words.', 43 ... extensions=['smart_strong']) 44 <p>Text with double__underscore__words.</p> 45 >>> print markdown.markdown('__Strong__ still works.', 46 ... extensions=['smart_strong']) 47 <p><strong>Strong</strong> still works.</p> 48 >>> print markdown.markdown('__this__works__too__.', 49 ... extensions=['smart_strong']) 50 <p><strong>this__works__too</strong>.</p> 51 52Copyright 2011 53[Waylan Limberg](http://achinghead.com) 54 55''' 56 57from __future__ import absolute_import 58from __future__ import unicode_literals 59from . import Extension 60from ..inlinepatterns import SimpleTagPattern 61 62SMART_STRONG_RE = r'(?<!\w)(_{2})(?!_)(.+?)(?<!_)\2(?!\w)' 63STRONG_RE = r'(\*{2})(.+?)\2' 64 65class SmartEmphasisExtension(Extension): 66 """ Add smart_emphasis extension to Markdown class.""" 67 68 def extendMarkdown(self, md, md_globals): 69 """ Modify inline patterns. """ 70 md.inlinePatterns['strong'] = SimpleTagPattern(STRONG_RE, 'strong') 71 md.inlinePatterns.add('strong2', SimpleTagPattern(SMART_STRONG_RE, 'strong'), '>emphasis2') 72 73def makeExtension(configs={}): 74 return SmartEmphasisExtension(configs=dict(configs)) 75