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- # markdown is released under the BSD license
- # Copyright 2007, 2008 The Python Markdown Project (v. 1.7 and later)
- # Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b)
- # Copyright 2004 Manfred Stienstra (the original version)
- #
- # 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 of the <organization> 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 PYTHON MARKDOWN PROJECT ''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 ANY CONTRIBUTORS TO THE PYTHON MARKDOWN PROJECT
- # 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.
- """
- Attribute List Extension for Python-Markdown
- ============================================
- Adds attribute list syntax. Inspired by
- [maruku](http://maruku.rubyforge.org/proposal.html#attribute_lists)'s
- feature of the same name.
- Copyright 2011 [Waylan Limberg](http://achinghead.com/).
- Contact: markdown@freewisdom.org
- License: BSD (see ../LICENSE.md for details)
- Dependencies:
- * [Python 2.4+](http://python.org)
- * [Markdown 2.1+](http://packages.python.org/Markdown/)
- """
- from __future__ import absolute_import
- from __future__ import unicode_literals
- from . import Extension
- from ..treeprocessors import Treeprocessor
- from ..util import isBlockLevel
- import re
- try:
- Scanner = re.Scanner
- except AttributeError:
- # must be on Python 2.4
- from sre import Scanner
- def _handle_double_quote(s, t):
- k, v = t.split('=')
- return k, v.strip('"')
- def _handle_single_quote(s, t):
- k, v = t.split('=')
- return k, v.strip("'")
- def _handle_key_value(s, t):
- return t.split('=')
- def _handle_word(s, t):
- if t.startswith('.'):
- return '.', t[1:]
- if t.startswith('#'):
- return 'id', t[1:]
- return t, t
- _scanner = Scanner([
- (r'[^ ]+=".*?"', _handle_double_quote),
- (r"[^ ]+='.*?'", _handle_single_quote),
- (r'[^ ]+=[^ ]*', _handle_key_value),
- (r'[^ ]+', _handle_word),
- (r' ', None)
- ])
- def get_attrs(str):
- """ Parse attribute list and return a list of attribute tuples. """
- return _scanner.scan(str)[0]
- def isheader(elem):
- return elem.tag in ['h1', 'h2', 'h3', 'h4', 'h5', 'h6']
- class AttrListTreeprocessor(Treeprocessor):
-
- BASE_RE = r'\{\:?([^\}]*)\}'
- HEADER_RE = re.compile(r'[ ]*%s[ ]*$' % BASE_RE)
- BLOCK_RE = re.compile(r'\n[ ]*%s[ ]*$' % BASE_RE)
- INLINE_RE = re.compile(r'^%s' % BASE_RE)
- NAME_RE = re.compile(r'[^A-Z_a-z\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u02ff\u0370-\u037d'
- r'\u037f-\u1fff\u200c-\u200d\u2070-\u218f\u2c00-\u2fef'
- r'\u3001-\ud7ff\uf900-\ufdcf\ufdf0-\ufffd'
- r'\:\-\.0-9\u00b7\u0300-\u036f\u203f-\u2040]+')
- def run(self, doc):
- for elem in doc.getiterator():
- if isBlockLevel(elem.tag):
- # Block level: check for attrs on last line of text
- RE = self.BLOCK_RE
- if isheader(elem):
- # header: check for attrs at end of line
- RE = self.HEADER_RE
- if len(elem) and elem[-1].tail:
- # has children. Get from tail of last child
- m = RE.search(elem[-1].tail)
- if m:
- self.assign_attrs(elem, m.group(1))
- elem[-1].tail = elem[-1].tail[:m.start()]
- if isheader(elem):
- # clean up trailing #s
- elem[-1].tail = elem[-1].tail.rstrip('#').rstrip()
- elif elem.text:
- # no children. Get from text.
- m = RE.search(elem.text)
- if m:
- self.assign_attrs(elem, m.group(1))
- elem.text = elem.text[:m.start()]
- if isheader(elem):
- # clean up trailing #s
- elem.text = elem.text.rstrip('#').rstrip()
- else:
- # inline: check for attrs at start of tail
- if elem.tail:
- m = self.INLINE_RE.match(elem.tail)
- if m:
- self.assign_attrs(elem, m.group(1))
- elem.tail = elem.tail[m.end():]
- def assign_attrs(self, elem, attrs):
- """ Assign attrs to element. """
- for k, v in get_attrs(attrs):
- if k == '.':
- # add to class
- cls = elem.get('class')
- if cls:
- elem.set('class', '%s %s' % (cls, v))
- else:
- elem.set('class', v)
- else:
- # assign attr k with v
- elem.set(self.sanitize_name(k), v)
- def sanitize_name(self, name):
- """
- Sanitize name as 'an XML Name, minus the ":"'.
- See http://www.w3.org/TR/REC-xml-names/#NT-NCName
- """
- return self.NAME_RE.sub('_', name)
- class AttrListExtension(Extension):
- def extendMarkdown(self, md, md_globals):
- md.treeprocessors.add('attr_list', AttrListTreeprocessor(md), '>prettify')
- def makeExtension(configs={}):
- return AttrListExtension(configs=configs)
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