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cil-3ce60cf7: Added Markdown

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1 parent f2e2efd commit d8194c8add2184d30256eac4c962877aedd361fd @chilts chilts committed Dec 19, 2009
Showing with 1,931 additions and 2 deletions.
  1. +8 −0 issues/c_bcab23f8.cil
  2. +2 −1 issues/i_3ce60cf7.cil
  3. +3 −0 markdown/__init__.py
  4. +1,913 −0 markdown/markdown2.py
  5. +1 −1 models.py
  6. +4 −0 util.py
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8 issues/c_bcab23f8.cil
@@ -0,0 +1,8 @@
+Issue: 3ce60cf7
+CreatedBy: Andrew Chilton <andychilton@gmail.com>
+Inserted: 2009-12-18T21:23:01
+Updated: 2009-12-18T21:23:22
+
+Added MarkDown.
+
+From: http://code.google.com/p/python-markdown2/
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3 issues/i_3ce60cf7.cil
@@ -3,9 +3,10 @@ Status: InProgress
CreatedBy: Andrew Chilton <andychilton@gmail.com>
AssignedTo: Andrew Chilton <andychilton@gmail.com>
Label: Milestone-v0.03
+Comment: bcab23f8
Comment: e094230f
Inserted: 2009-12-17T02:49:20
-Updated: 2009-12-17T04:37:31
+Updated: 2009-12-18T21:23:22
Add the following markup languages to lollysite:
View
3 markdown/__init__.py
@@ -0,0 +1,3 @@
+from markdown2 import markdown, Markdown
+
+__all__ = ['markdown']
View
1,913 markdown/markdown2.py
@@ -0,0 +1,1913 @@
+#!/usr/bin/env python
+# Copyright (c) 2007-2008 ActiveState Corp.
+# License: MIT (http://www.opensource.org/licenses/mit-license.php)
+
+r"""A fast and complete Python implementation of Markdown.
+
+[from http://daringfireball.net/projects/markdown/]
+> Markdown is a text-to-HTML filter; it translates an easy-to-read /
+> easy-to-write structured text format into HTML. Markdown's text
+> format is most similar to that of plain text email, and supports
+> features such as headers, *emphasis*, code blocks, blockquotes, and
+> links.
+>
+> Markdown's syntax is designed not as a generic markup language, but
+> specifically to serve as a front-end to (X)HTML. You can use span-level
+> HTML tags anywhere in a Markdown document, and you can use block level
+> HTML tags (like <div> and <table> as well).
+
+Module usage:
+
+ >>> import markdown2
+ >>> markdown2.markdown("*boo!*") # or use `html = markdown_path(PATH)`
+ u'<p><em>boo!</em></p>\n'
+
+ >>> markdowner = Markdown()
+ >>> markdowner.convert("*boo!*")
+ u'<p><em>boo!</em></p>\n'
+ >>> markdowner.convert("**boom!**")
+ u'<p><strong>boom!</strong></p>\n'
+
+This implementation of Markdown implements the full "core" syntax plus a
+number of extras (e.g., code syntax coloring, footnotes) as described on
+<http://code.google.com/p/python-markdown2/wiki/Extras>.
+"""
+
+cmdln_desc = """A fast and complete Python implementation of Markdown, a
+text-to-HTML conversion tool for web writers.
+
+Supported extras (see -x|--extras option below):
+* code-friendly: Disable _ and __ for em and strong.
+* code-color: Pygments-based syntax coloring of <code> sections.
+* cuddled-lists: Allow lists to be cuddled to the preceding paragraph.
+* footnotes: Support footnotes as in use on daringfireball.net and
+ implemented in other Markdown processors (tho not in Markdown.pl v1.0.1).
+* pyshell: Treats unindented Python interactive shell sessions as <code>
+ blocks.
+* link-patterns: Auto-link given regex patterns in text (e.g. bug number
+ references, revision number references).
+* xml: Passes one-liner processing instructions and namespaced XML tags.
+"""
+
+# Dev Notes:
+# - There is already a Python markdown processor
+# (http://www.freewisdom.org/projects/python-markdown/).
+# - Python's regex syntax doesn't have '\z', so I'm using '\Z'. I'm
+# not yet sure if there implications with this. Compare 'pydoc sre'
+# and 'perldoc perlre'.
+
+__version_info__ = (1, 0, 1, 16) # first three nums match Markdown.pl
+__version__ = '1.0.1.16'
+__author__ = "Trent Mick"
+
+import os
+import sys
+from pprint import pprint
+import re
+import logging
+try:
+ from hashlib import md5
+except ImportError:
+ from md5 import md5
+import optparse
+from random import random, randint
+import codecs
+from urllib import quote
+
+
+
+#---- Python version compat
+
+if sys.version_info[:2] < (2,4):
+ from sets import Set as set
+ def reversed(sequence):
+ for i in sequence[::-1]:
+ yield i
+ def _unicode_decode(s, encoding, errors='xmlcharrefreplace'):
+ return unicode(s, encoding, errors)
+else:
+ def _unicode_decode(s, encoding, errors='strict'):
+ return s.decode(encoding, errors)
+
+
+#---- globals
+
+DEBUG = False
+log = logging.getLogger("markdown")
+
+DEFAULT_TAB_WIDTH = 4
+
+
+try:
+ import uuid
+except ImportError:
+ SECRET_SALT = str(randint(0, 1000000))
+else:
+ SECRET_SALT = str(uuid.uuid4())
+def _hash_ascii(s):
+ #return md5(s).hexdigest() # Markdown.pl effectively does this.
+ return 'md5-' + md5(SECRET_SALT + s).hexdigest()
+def _hash_text(s):
+ return 'md5-' + md5(SECRET_SALT + s.encode("utf-8")).hexdigest()
+
+# Table of hash values for escaped characters:
+g_escape_table = dict([(ch, _hash_ascii(ch))
+ for ch in '\\`*_{}[]()>#+-.!'])
+
+
+
+#---- exceptions
+
+class MarkdownError(Exception):
+ pass
+
+
+
+#---- public api
+
+def markdown_path(path, encoding="utf-8",
+ html4tags=False, tab_width=DEFAULT_TAB_WIDTH,
+ safe_mode=None, extras=None, link_patterns=None,
+ use_file_vars=False):
+ fp = codecs.open(path, 'r', encoding)
+ text = fp.read()
+ fp.close()
+ return Markdown(html4tags=html4tags, tab_width=tab_width,
+ safe_mode=safe_mode, extras=extras,
+ link_patterns=link_patterns,
+ use_file_vars=use_file_vars).convert(text)
+
+def markdown(text, html4tags=False, tab_width=DEFAULT_TAB_WIDTH,
+ safe_mode=None, extras=None, link_patterns=None,
+ use_file_vars=False):
+ return Markdown(html4tags=html4tags, tab_width=tab_width,
+ safe_mode=safe_mode, extras=extras,
+ link_patterns=link_patterns,
+ use_file_vars=use_file_vars).convert(text)
+
+class Markdown(object):
+ # The dict of "extras" to enable in processing -- a mapping of
+ # extra name to argument for the extra. Most extras do not have an
+ # argument, in which case the value is None.
+ #
+ # This can be set via (a) subclassing and (b) the constructor
+ # "extras" argument.
+ extras = None
+
+ urls = None
+ titles = None
+ html_blocks = None
+ html_spans = None
+ html_removed_text = "[HTML_REMOVED]" # for compat with markdown.py
+
+ # Used to track when we're inside an ordered or unordered list
+ # (see _ProcessListItems() for details):
+ list_level = 0
+
+ _ws_only_line_re = re.compile(r"^[ \t]+$", re.M)
+
+ def __init__(self, html4tags=False, tab_width=4, safe_mode=None,
+ extras=None, link_patterns=None, use_file_vars=False):
+ if html4tags:
+ self.empty_element_suffix = ">"
+ else:
+ self.empty_element_suffix = " />"
+ self.tab_width = tab_width
+
+ # For compatibility with earlier markdown2.py and with
+ # markdown.py's safe_mode being a boolean,
+ # safe_mode == True -> "replace"
+ if safe_mode is True:
+ self.safe_mode = "replace"
+ else:
+ self.safe_mode = safe_mode
+
+ if self.extras is None:
+ self.extras = {}
+ elif not isinstance(self.extras, dict):
+ self.extras = dict([(e, None) for e in self.extras])
+ if extras:
+ if not isinstance(extras, dict):
+ extras = dict([(e, None) for e in extras])
+ self.extras.update(extras)
+ assert isinstance(self.extras, dict)
+ self._instance_extras = self.extras.copy()
+ self.link_patterns = link_patterns
+ self.use_file_vars = use_file_vars
+ self._outdent_re = re.compile(r'^(\t|[ ]{1,%d})' % tab_width, re.M)
+
+ def reset(self):
+ self.urls = {}
+ self.titles = {}
+ self.html_blocks = {}
+ self.html_spans = {}
+ self.list_level = 0
+ self.extras = self._instance_extras.copy()
+ if "footnotes" in self.extras:
+ self.footnotes = {}
+ self.footnote_ids = []
+
+ def convert(self, text):
+ """Convert the given text."""
+ # Main function. The order in which other subs are called here is
+ # essential. Link and image substitutions need to happen before
+ # _EscapeSpecialChars(), so that any *'s or _'s in the <a>
+ # and <img> tags get encoded.
+
+ # Clear the global hashes. If we don't clear these, you get conflicts
+ # from other articles when generating a page which contains more than
+ # one article (e.g. an index page that shows the N most recent
+ # articles):
+ self.reset()
+
+ if not isinstance(text, unicode):
+ #TODO: perhaps shouldn't presume UTF-8 for string input?
+ text = unicode(text, 'utf-8')
+
+ if self.use_file_vars:
+ # Look for emacs-style file variable hints.
+ emacs_vars = self._get_emacs_vars(text)
+ if "markdown-extras" in emacs_vars:
+ splitter = re.compile("[ ,]+")
+ for e in splitter.split(emacs_vars["markdown-extras"]):
+ if '=' in e:
+ ename, earg = e.split('=', 1)
+ try:
+ earg = int(earg)
+ except ValueError:
+ pass
+ else:
+ ename, earg = e, None
+ self.extras[ename] = earg
+
+ # Standardize line endings:
+ text = re.sub("\r\n|\r", "\n", text)
+
+ # Make sure $text ends with a couple of newlines:
+ text += "\n\n"
+
+ # Convert all tabs to spaces.
+ text = self._detab(text)
+
+ # Strip any lines consisting only of spaces and tabs.
+ # This makes subsequent regexen easier to write, because we can
+ # match consecutive blank lines with /\n+/ instead of something
+ # contorted like /[ \t]*\n+/ .
+ text = self._ws_only_line_re.sub("", text)
+
+ if self.safe_mode:
+ text = self._hash_html_spans(text)
+
+ # Turn block-level HTML blocks into hash entries
+ text = self._hash_html_blocks(text, raw=True)
+
+ # Strip link definitions, store in hashes.
+ if "footnotes" in self.extras:
+ # Must do footnotes first because an unlucky footnote defn
+ # looks like a link defn:
+ # [^4]: this "looks like a link defn"
+ text = self._strip_footnote_definitions(text)
+ text = self._strip_link_definitions(text)
+
+ text = self._run_block_gamut(text)
+
+ if "footnotes" in self.extras:
+ text = self._add_footnotes(text)
+
+ text = self._unescape_special_chars(text)
+
+ if self.safe_mode:
+ text = self._unhash_html_spans(text)
+
+ text += "\n"
+ return text
+
+ _emacs_oneliner_vars_pat = re.compile(r"-\*-\s*([^\r\n]*?)\s*-\*-", re.UNICODE)
+ # This regular expression is intended to match blocks like this:
+ # PREFIX Local Variables: SUFFIX
+ # PREFIX mode: Tcl SUFFIX
+ # PREFIX End: SUFFIX
+ # Some notes:
+ # - "[ \t]" is used instead of "\s" to specifically exclude newlines
+ # - "(\r\n|\n|\r)" is used instead of "$" because the sre engine does
+ # not like anything other than Unix-style line terminators.
+ _emacs_local_vars_pat = re.compile(r"""^
+ (?P<prefix>(?:[^\r\n|\n|\r])*?)
+ [\ \t]*Local\ Variables:[\ \t]*
+ (?P<suffix>.*?)(?:\r\n|\n|\r)
+ (?P<content>.*?\1End:)
+ """, re.IGNORECASE | re.MULTILINE | re.DOTALL | re.VERBOSE)
+
+ def _get_emacs_vars(self, text):
+ """Return a dictionary of emacs-style local variables.
+
+ Parsing is done loosely according to this spec (and according to
+ some in-practice deviations from this):
+ http://www.gnu.org/software/emacs/manual/html_node/emacs/Specifying-File-Variables.html#Specifying-File-Variables
+ """
+ emacs_vars = {}
+ SIZE = pow(2, 13) # 8kB
+
+ # Search near the start for a '-*-'-style one-liner of variables.
+ head = text[:SIZE]
+ if "-*-" in head:
+ match = self._emacs_oneliner_vars_pat.search(head)
+ if match:
+ emacs_vars_str = match.group(1)
+ assert '\n' not in emacs_vars_str
+ emacs_var_strs = [s.strip() for s in emacs_vars_str.split(';')
+ if s.strip()]
+ if len(emacs_var_strs) == 1 and ':' not in emacs_var_strs[0]:
+ # While not in the spec, this form is allowed by emacs:
+ # -*- Tcl -*-
+ # where the implied "variable" is "mode". This form
+ # is only allowed if there are no other variables.
+ emacs_vars["mode"] = emacs_var_strs[0].strip()
+ else:
+ for emacs_var_str in emacs_var_strs:
+ try:
+ variable, value = emacs_var_str.strip().split(':', 1)
+ except ValueError:
+ log.debug("emacs variables error: malformed -*- "
+ "line: %r", emacs_var_str)
+ continue
+ # Lowercase the variable name because Emacs allows "Mode"
+ # or "mode" or "MoDe", etc.
+ emacs_vars[variable.lower()] = value.strip()
+
+ tail = text[-SIZE:]
+ if "Local Variables" in tail:
+ match = self._emacs_local_vars_pat.search(tail)
+ if match:
+ prefix = match.group("prefix")
+ suffix = match.group("suffix")
+ lines = match.group("content").splitlines(0)
+ #print "prefix=%r, suffix=%r, content=%r, lines: %s"\
+ # % (prefix, suffix, match.group("content"), lines)
+
+ # Validate the Local Variables block: proper prefix and suffix
+ # usage.
+ for i, line in enumerate(lines):
+ if not line.startswith(prefix):
+ log.debug("emacs variables error: line '%s' "
+ "does not use proper prefix '%s'"
+ % (line, prefix))
+ return {}
+ # Don't validate suffix on last line. Emacs doesn't care,
+ # neither should we.
+ if i != len(lines)-1 and not line.endswith(suffix):
+ log.debug("emacs variables error: line '%s' "
+ "does not use proper suffix '%s'"
+ % (line, suffix))
+ return {}
+
+ # Parse out one emacs var per line.
+ continued_for = None
+ for line in lines[:-1]: # no var on the last line ("PREFIX End:")
+ if prefix: line = line[len(prefix):] # strip prefix
+ if suffix: line = line[:-len(suffix)] # strip suffix
+ line = line.strip()
+ if continued_for:
+ variable = continued_for
+ if line.endswith('\\'):
+ line = line[:-1].rstrip()
+ else:
+ continued_for = None
+ emacs_vars[variable] += ' ' + line
+ else:
+ try:
+ variable, value = line.split(':', 1)
+ except ValueError:
+ log.debug("local variables error: missing colon "
+ "in local variables entry: '%s'" % line)
+ continue
+ # Do NOT lowercase the variable name, because Emacs only
+ # allows "mode" (and not "Mode", "MoDe", etc.) in this block.
+ value = value.strip()
+ if value.endswith('\\'):
+ value = value[:-1].rstrip()
+ continued_for = variable
+ else:
+ continued_for = None
+ emacs_vars[variable] = value
+
+ # Unquote values.
+ for var, val in emacs_vars.items():
+ if len(val) > 1 and (val.startswith('"') and val.endswith('"')
+ or val.startswith('"') and val.endswith('"')):
+ emacs_vars[var] = val[1:-1]
+
+ return emacs_vars
+
+ # Cribbed from a post by Bart Lateur:
+ # <http://www.nntp.perl.org/group/perl.macperl.anyperl/154>
+ _detab_re = re.compile(r'(.*?)\t', re.M)
+ def _detab_sub(self, match):
+ g1 = match.group(1)
+ return g1 + (' ' * (self.tab_width - len(g1) % self.tab_width))
+ def _detab(self, text):
+ r"""Remove (leading?) tabs from a file.
+
+ >>> m = Markdown()
+ >>> m._detab("\tfoo")
+ ' foo'
+ >>> m._detab(" \tfoo")
+ ' foo'
+ >>> m._detab("\t foo")
+ ' foo'
+ >>> m._detab(" foo")
+ ' foo'
+ >>> m._detab(" foo\n\tbar\tblam")
+ ' foo\n bar blam'
+ """
+ if '\t' not in text:
+ return text
+ return self._detab_re.subn(self._detab_sub, text)[0]
+
+ _block_tags_a = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del'
+ _strict_tag_block_re = re.compile(r"""
+ ( # save in \1
+ ^ # start of line (with re.M)
+ <(%s) # start tag = \2
+ \b # word break
+ (.*\n)*? # any number of lines, minimally matching
+ </\2> # the matching end tag
+ [ \t]* # trailing spaces/tabs
+ (?=\n+|\Z) # followed by a newline or end of document
+ )
+ """ % _block_tags_a,
+ re.X | re.M)
+
+ _block_tags_b = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math'
+ _liberal_tag_block_re = re.compile(r"""
+ ( # save in \1
+ ^ # start of line (with re.M)
+ <(%s) # start tag = \2
+ \b # word break
+ (.*\n)*? # any number of lines, minimally matching
+ .*</\2> # the matching end tag
+ [ \t]* # trailing spaces/tabs
+ (?=\n+|\Z) # followed by a newline or end of document
+ )
+ """ % _block_tags_b,
+ re.X | re.M)
+
+ def _hash_html_block_sub(self, match, raw=False):
+ html = match.group(1)
+ if raw and self.safe_mode:
+ html = self._sanitize_html(html)
+ key = _hash_text(html)
+ self.html_blocks[key] = html
+ return "\n\n" + key + "\n\n"
+
+ def _hash_html_blocks(self, text, raw=False):
+ """Hashify HTML blocks
+
+ We only want to do this for block-level HTML tags, such as headers,
+ lists, and tables. That's because we still want to wrap <p>s around
+ "paragraphs" that are wrapped in non-block-level tags, such as anchors,
+ phrase emphasis, and spans. The list of tags we're looking for is
+ hard-coded.
+
+ @param raw {boolean} indicates if these are raw HTML blocks in
+ the original source. It makes a difference in "safe" mode.
+ """
+ if '<' not in text:
+ return text
+
+ # Pass `raw` value into our calls to self._hash_html_block_sub.
+ hash_html_block_sub = _curry(self._hash_html_block_sub, raw=raw)
+
+ # First, look for nested blocks, e.g.:
+ # <div>
+ # <div>
+ # tags for inner block must be indented.
+ # </div>
+ # </div>
+ #
+ # The outermost tags must start at the left margin for this to match, and
+ # the inner nested divs must be indented.
+ # We need to do this before the next, more liberal match, because the next
+ # match will start at the first `<div>` and stop at the first `</div>`.
+ text = self._strict_tag_block_re.sub(hash_html_block_sub, text)
+
+ # Now match more liberally, simply from `\n<tag>` to `</tag>\n`
+ text = self._liberal_tag_block_re.sub(hash_html_block_sub, text)
+
+ # Special case just for <hr />. It was easier to make a special
+ # case than to make the other regex more complicated.
+ if "<hr" in text:
+ _hr_tag_re = _hr_tag_re_from_tab_width(self.tab_width)
+ text = _hr_tag_re.sub(hash_html_block_sub, text)
+
+ # Special case for standalone HTML comments:
+ if "<!--" in text:
+ start = 0
+ while True:
+ # Delimiters for next comment block.
+ try:
+ start_idx = text.index("<!--", start)
+ except ValueError, ex:
+ break
+ try:
+ end_idx = text.index("-->", start_idx) + 3
+ except ValueError, ex:
+ break
+
+ # Start position for next comment block search.
+ start = end_idx
+
+ # Validate whitespace before comment.
+ if start_idx:
+ # - Up to `tab_width - 1` spaces before start_idx.
+ for i in range(self.tab_width - 1):
+ if text[start_idx - 1] != ' ':
+ break
+ start_idx -= 1
+ if start_idx == 0:
+ break
+ # - Must be preceded by 2 newlines or hit the start of
+ # the document.
+ if start_idx == 0:
+ pass
+ elif start_idx == 1 and text[0] == '\n':
+ start_idx = 0 # to match minute detail of Markdown.pl regex
+ elif text[start_idx-2:start_idx] == '\n\n':
+ pass
+ else:
+ break
+
+ # Validate whitespace after comment.
+ # - Any number of spaces and tabs.
+ while end_idx < len(text):
+ if text[end_idx] not in ' \t':
+ break
+ end_idx += 1
+ # - Must be following by 2 newlines or hit end of text.
+ if text[end_idx:end_idx+2] not in ('', '\n', '\n\n'):
+ continue
+
+ # Escape and hash (must match `_hash_html_block_sub`).
+ html = text[start_idx:end_idx]
+ if raw and self.safe_mode:
+ html = self._sanitize_html(html)
+ key = _hash_text(html)
+ self.html_blocks[key] = html
+ text = text[:start_idx] + "\n\n" + key + "\n\n" + text[end_idx:]
+
+ if "xml" in self.extras:
+ # Treat XML processing instructions and namespaced one-liner
+ # tags as if they were block HTML tags. E.g., if standalone
+ # (i.e. are their own paragraph), the following do not get
+ # wrapped in a <p> tag:
+ # <?foo bar?>
+ #
+ # <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="chapter_1.md"/>
+ _xml_oneliner_re = _xml_oneliner_re_from_tab_width(self.tab_width)
+ text = _xml_oneliner_re.sub(hash_html_block_sub, text)
+
+ return text
+
+ def _strip_link_definitions(self, text):
+ # Strips link definitions from text, stores the URLs and titles in
+ # hash references.
+ less_than_tab = self.tab_width - 1
+
+ # Link defs are in the form:
+ # [id]: url "optional title"
+ _link_def_re = re.compile(r"""
+ ^[ ]{0,%d}\[(.+)\]: # id = \1
+ [ \t]*
+ \n? # maybe *one* newline
+ [ \t]*
+ <?(.+?)>? # url = \2
+ [ \t]*
+ (?:
+ \n? # maybe one newline
+ [ \t]*
+ (?<=\s) # lookbehind for whitespace
+ ['"(]
+ ([^\n]*) # title = \3
+ ['")]
+ [ \t]*
+ )? # title is optional
+ (?:\n+|\Z)
+ """ % less_than_tab, re.X | re.M | re.U)
+ return _link_def_re.sub(self._extract_link_def_sub, text)
+
+ def _extract_link_def_sub(self, match):
+ id, url, title = match.groups()
+ key = id.lower() # Link IDs are case-insensitive
+ self.urls[key] = self._encode_amps_and_angles(url)
+ if title:
+ self.titles[key] = title.replace('"', '&quot;')
+ return ""
+
+ def _extract_footnote_def_sub(self, match):
+ id, text = match.groups()
+ text = _dedent(text, skip_first_line=not text.startswith('\n')).strip()
+ normed_id = re.sub(r'\W', '-', id)
+ # Ensure footnote text ends with a couple newlines (for some
+ # block gamut matches).
+ self.footnotes[normed_id] = text + "\n\n"
+ return ""
+
+ def _strip_footnote_definitions(self, text):
+ """A footnote definition looks like this:
+
+ [^note-id]: Text of the note.
+
+ May include one or more indented paragraphs.
+
+ Where,
+ - The 'note-id' can be pretty much anything, though typically it
+ is the number of the footnote.
+ - The first paragraph may start on the next line, like so:
+
+ [^note-id]:
+ Text of the note.
+ """
+ less_than_tab = self.tab_width - 1
+ footnote_def_re = re.compile(r'''
+ ^[ ]{0,%d}\[\^(.+)\]: # id = \1
+ [ \t]*
+ ( # footnote text = \2
+ # First line need not start with the spaces.
+ (?:\s*.*\n+)
+ (?:
+ (?:[ ]{%d} | \t) # Subsequent lines must be indented.
+ .*\n+
+ )*
+ )
+ # Lookahead for non-space at line-start, or end of doc.
+ (?:(?=^[ ]{0,%d}\S)|\Z)
+ ''' % (less_than_tab, self.tab_width, self.tab_width),
+ re.X | re.M)
+ return footnote_def_re.sub(self._extract_footnote_def_sub, text)
+
+
+ _hr_res = [
+ re.compile(r"^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$", re.M),
+ re.compile(r"^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$", re.M),
+ re.compile(r"^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$", re.M),
+ ]
+
+ def _run_block_gamut(self, text):
+ # These are all the transformations that form block-level
+ # tags like paragraphs, headers, and list items.
+
+ text = self._do_headers(text)
+
+ # Do Horizontal Rules:
+ hr = "\n<hr"+self.empty_element_suffix+"\n"
+ for hr_re in self._hr_res:
+ text = hr_re.sub(hr, text)
+
+ text = self._do_lists(text)
+
+ if "pyshell" in self.extras:
+ text = self._prepare_pyshell_blocks(text)
+
+ text = self._do_code_blocks(text)
+
+ text = self._do_block_quotes(text)
+
+ # We already ran _HashHTMLBlocks() before, in Markdown(), but that
+ # was to escape raw HTML in the original Markdown source. This time,
+ # we're escaping the markup we've just created, so that we don't wrap
+ # <p> tags around block-level tags.
+ text = self._hash_html_blocks(text)
+
+ text = self._form_paragraphs(text)
+
+ return text
+
+ def _pyshell_block_sub(self, match):
+ lines = match.group(0).splitlines(0)
+ _dedentlines(lines)
+ indent = ' ' * self.tab_width
+ s = ('\n' # separate from possible cuddled paragraph
+ + indent + ('\n'+indent).join(lines)
+ + '\n\n')
+ return s
+
+ def _prepare_pyshell_blocks(self, text):
+ """Ensure that Python interactive shell sessions are put in
+ code blocks -- even if not properly indented.
+ """
+ if ">>>" not in text:
+ return text
+
+ less_than_tab = self.tab_width - 1
+ _pyshell_block_re = re.compile(r"""
+ ^([ ]{0,%d})>>>[ ].*\n # first line
+ ^(\1.*\S+.*\n)* # any number of subsequent lines
+ ^\n # ends with a blank line
+ """ % less_than_tab, re.M | re.X)
+
+ return _pyshell_block_re.sub(self._pyshell_block_sub, text)
+
+ def _run_span_gamut(self, text):
+ # These are all the transformations that occur *within* block-level
+ # tags like paragraphs, headers, and list items.
+
+ text = self._do_code_spans(text)
+
+ text = self._escape_special_chars(text)
+
+ # Process anchor and image tags.
+ text = self._do_links(text)
+
+ # Make links out of things like `<http://example.com/>`
+ # Must come after _do_links(), because you can use < and >
+ # delimiters in inline links like [this](<url>).
+ text = self._do_auto_links(text)
+
+ if "link-patterns" in self.extras:
+ text = self._do_link_patterns(text)
+
+ text = self._encode_amps_and_angles(text)
+
+ text = self._do_italics_and_bold(text)
+
+ # Do hard breaks:
+ text = re.sub(r" {2,}\n", " <br%s\n" % self.empty_element_suffix, text)
+
+ return text
+
+ # "Sorta" because auto-links are identified as "tag" tokens.
+ _sorta_html_tokenize_re = re.compile(r"""
+ (
+ # tag
+ </?
+ (?:\w+) # tag name
+ (?:\s+(?:[\w-]+:)?[\w-]+=(?:".*?"|'.*?'))* # attributes
+ \s*/?>
+ |
+ # auto-link (e.g., <http://www.activestate.com/>)
+ <\w+[^>]*>
+ |
+ <!--.*?--> # comment
+ |
+ <\?.*?\?> # processing instruction
+ )
+ """, re.X)
+
+ def _escape_special_chars(self, text):
+ # Python markdown note: the HTML tokenization here differs from
+ # that in Markdown.pl, hence the behaviour for subtle cases can
+ # differ (I believe the tokenizer here does a better job because
+ # it isn't susceptible to unmatched '<' and '>' in HTML tags).
+ # Note, however, that '>' is not allowed in an auto-link URL
+ # here.
+ escaped = []
+ is_html_markup = False
+ for token in self._sorta_html_tokenize_re.split(text):
+ if is_html_markup:
+ # Within tags/HTML-comments/auto-links, encode * and _
+ # so they don't conflict with their use in Markdown for
+ # italics and strong. We're replacing each such
+ # character with its corresponding MD5 checksum value;
+ # this is likely overkill, but it should prevent us from
+ # colliding with the escape values by accident.
+ escaped.append(token.replace('*', g_escape_table['*'])
+ .replace('_', g_escape_table['_']))
+ else:
+ escaped.append(self._encode_backslash_escapes(token))
+ is_html_markup = not is_html_markup
+ return ''.join(escaped)
+
+ def _hash_html_spans(self, text):
+ # Used for safe_mode.
+
+ def _is_auto_link(s):
+ if ':' in s and self._auto_link_re.match(s):
+ return True
+ elif '@' in s and self._auto_email_link_re.match(s):
+ return True
+ return False
+
+ tokens = []
+ is_html_markup = False
+ for token in self._sorta_html_tokenize_re.split(text):
+ if is_html_markup and not _is_auto_link(token):
+ sanitized = self._sanitize_html(token)
+ key = _hash_text(sanitized)
+ self.html_spans[key] = sanitized
+ tokens.append(key)
+ else:
+ tokens.append(token)
+ is_html_markup = not is_html_markup
+ return ''.join(tokens)
+
+ def _unhash_html_spans(self, text):
+ for key, sanitized in self.html_spans.items():
+ text = text.replace(key, sanitized)
+ return text
+
+ def _sanitize_html(self, s):
+ if self.safe_mode == "replace":
+ return self.html_removed_text
+ elif self.safe_mode == "escape":
+ replacements = [
+ ('&', '&amp;'),
+ ('<', '&lt;'),
+ ('>', '&gt;'),
+ ]
+ for before, after in replacements:
+ s = s.replace(before, after)
+ return s
+ else:
+ raise MarkdownError("invalid value for 'safe_mode': %r (must be "
+ "'escape' or 'replace')" % self.safe_mode)
+
+ _tail_of_inline_link_re = re.compile(r'''
+ # Match tail of: [text](/url/) or [text](/url/ "title")
+ \( # literal paren
+ [ \t]*
+ (?P<url> # \1
+ <.*?>
+ |
+ .*?
+ )
+ [ \t]*
+ ( # \2
+ (['"]) # quote char = \3
+ (?P<title>.*?)
+ \3 # matching quote
+ )? # title is optional
+ \)
+ ''', re.X | re.S)
+ _tail_of_reference_link_re = re.compile(r'''
+ # Match tail of: [text][id]
+ [ ]? # one optional space
+ (?:\n[ ]*)? # one optional newline followed by spaces
+ \[
+ (?P<id>.*?)
+ \]
+ ''', re.X | re.S)
+
+ def _do_links(self, text):
+ """Turn Markdown link shortcuts into XHTML <a> and <img> tags.
+
+ This is a combination of Markdown.pl's _DoAnchors() and
+ _DoImages(). They are done together because that simplified the
+ approach. It was necessary to use a different approach than
+ Markdown.pl because of the lack of atomic matching support in
+ Python's regex engine used in $g_nested_brackets.
+ """
+ MAX_LINK_TEXT_SENTINEL = 3000 # markdown2 issue 24
+
+ # `anchor_allowed_pos` is used to support img links inside
+ # anchors, but not anchors inside anchors. An anchor's start
+ # pos must be `>= anchor_allowed_pos`.
+ anchor_allowed_pos = 0
+
+ curr_pos = 0
+ while True: # Handle the next link.
+ # The next '[' is the start of:
+ # - an inline anchor: [text](url "title")
+ # - a reference anchor: [text][id]
+ # - an inline img: ![text](url "title")
+ # - a reference img: ![text][id]
+ # - a footnote ref: [^id]
+ # (Only if 'footnotes' extra enabled)
+ # - a footnote defn: [^id]: ...
+ # (Only if 'footnotes' extra enabled) These have already
+ # been stripped in _strip_footnote_definitions() so no
+ # need to watch for them.
+ # - a link definition: [id]: url "title"
+ # These have already been stripped in
+ # _strip_link_definitions() so no need to watch for them.
+ # - not markup: [...anything else...
+ try:
+ start_idx = text.index('[', curr_pos)
+ except ValueError:
+ break
+ text_length = len(text)
+
+ # Find the matching closing ']'.
+ # Markdown.pl allows *matching* brackets in link text so we
+ # will here too. Markdown.pl *doesn't* currently allow
+ # matching brackets in img alt text -- we'll differ in that
+ # regard.
+ bracket_depth = 0
+ for p in range(start_idx+1, min(start_idx+MAX_LINK_TEXT_SENTINEL,
+ text_length)):
+ ch = text[p]
+ if ch == ']':
+ bracket_depth -= 1
+ if bracket_depth < 0:
+ break
+ elif ch == '[':
+ bracket_depth += 1
+ else:
+ # Closing bracket not found within sentinel length.
+ # This isn't markup.
+ curr_pos = start_idx + 1
+ continue
+ link_text = text[start_idx+1:p]
+
+ # Possibly a footnote ref?
+ if "footnotes" in self.extras and link_text.startswith("^"):
+ normed_id = re.sub(r'\W', '-', link_text[1:])
+ if normed_id in self.footnotes:
+ self.footnote_ids.append(normed_id)
+ result = '<sup class="footnote-ref" id="fnref-%s">' \
+ '<a href="#fn-%s">%s</a></sup>' \
+ % (normed_id, normed_id, len(self.footnote_ids))
+ text = text[:start_idx] + result + text[p+1:]
+ else:
+ # This id isn't defined, leave the markup alone.
+ curr_pos = p+1
+ continue
+
+ # Now determine what this is by the remainder.
+ p += 1
+ if p == text_length:
+ return text
+
+ # Inline anchor or img?
+ if text[p] == '(': # attempt at perf improvement
+ match = self._tail_of_inline_link_re.match(text, p)
+ if match:
+ # Handle an inline anchor or img.
+ is_img = start_idx > 0 and text[start_idx-1] == "!"
+ if is_img:
+ start_idx -= 1
+
+ url, title = match.group("url"), match.group("title")
+ if url and url[0] == '<':
+ url = url[1:-1] # '<url>' -> 'url'
+ # We've got to encode these to avoid conflicting
+ # with italics/bold.
+ url = url.replace('*', g_escape_table['*']) \
+ .replace('_', g_escape_table['_'])
+ if title:
+ title_str = ' title="%s"' \
+ % title.replace('*', g_escape_table['*']) \
+ .replace('_', g_escape_table['_']) \
+ .replace('"', '&quot;')
+ else:
+ title_str = ''
+ if is_img:
+ result = '<img src="%s" alt="%s"%s%s' \
+ % (url.replace('"', '&quot;'),
+ link_text.replace('"', '&quot;'),
+ title_str, self.empty_element_suffix)
+ curr_pos = start_idx + len(result)
+ text = text[:start_idx] + result + text[match.end():]
+ elif start_idx >= anchor_allowed_pos:
+ result_head = '<a href="%s"%s>' % (url, title_str)
+ result = '%s%s</a>' % (result_head, link_text)
+ # <img> allowed from curr_pos on, <a> from
+ # anchor_allowed_pos on.
+ curr_pos = start_idx + len(result_head)
+ anchor_allowed_pos = start_idx + len(result)
+ text = text[:start_idx] + result + text[match.end():]
+ else:
+ # Anchor not allowed here.
+ curr_pos = start_idx + 1
+ continue
+
+ # Reference anchor or img?
+ else:
+ match = self._tail_of_reference_link_re.match(text, p)
+ if match:
+ # Handle a reference-style anchor or img.
+ is_img = start_idx > 0 and text[start_idx-1] == "!"
+ if is_img:
+ start_idx -= 1
+ link_id = match.group("id").lower()
+ if not link_id:
+ link_id = link_text.lower() # for links like [this][]
+ if link_id in self.urls:
+ url = self.urls[link_id]
+ # We've got to encode these to avoid conflicting
+ # with italics/bold.
+ url = url.replace('*', g_escape_table['*']) \
+ .replace('_', g_escape_table['_'])
+ title = self.titles.get(link_id)
+ if title:
+ title = title.replace('*', g_escape_table['*']) \
+ .replace('_', g_escape_table['_'])
+ title_str = ' title="%s"' % title
+ else:
+ title_str = ''
+ if is_img:
+ result = '<img src="%s" alt="%s"%s%s' \
+ % (url.replace('"', '&quot;'),
+ link_text.replace('"', '&quot;'),
+ title_str, self.empty_element_suffix)
+ curr_pos = start_idx + len(result)
+ text = text[:start_idx] + result + text[match.end():]
+ elif start_idx >= anchor_allowed_pos:
+ result = '<a href="%s"%s>%s</a>' \
+ % (url, title_str, link_text)
+ result_head = '<a href="%s"%s>' % (url, title_str)
+ result = '%s%s</a>' % (result_head, link_text)
+ # <img> allowed from curr_pos on, <a> from
+ # anchor_allowed_pos on.
+ curr_pos = start_idx + len(result_head)
+ anchor_allowed_pos = start_idx + len(result)
+ text = text[:start_idx] + result + text[match.end():]
+ else:
+ # Anchor not allowed here.
+ curr_pos = start_idx + 1
+ else:
+ # This id isn't defined, leave the markup alone.
+ curr_pos = match.end()
+ continue
+
+ # Otherwise, it isn't markup.
+ curr_pos = start_idx + 1
+
+ return text
+
+
+ _setext_h_re = re.compile(r'^(.+)[ \t]*\n(=+|-+)[ \t]*\n+', re.M)
+ def _setext_h_sub(self, match):
+ n = {"=": 1, "-": 2}[match.group(2)[0]]
+ demote_headers = self.extras.get("demote-headers")
+ if demote_headers:
+ n = min(n + demote_headers, 6)
+ return "<h%d>%s</h%d>\n\n" \
+ % (n, self._run_span_gamut(match.group(1)), n)
+
+ _atx_h_re = re.compile(r'''
+ ^(\#{1,6}) # \1 = string of #'s
+ [ \t]*
+ (.+?) # \2 = Header text
+ [ \t]*
+ (?<!\\) # ensure not an escaped trailing '#'
+ \#* # optional closing #'s (not counted)
+ \n+
+ ''', re.X | re.M)
+ def _atx_h_sub(self, match):
+ n = len(match.group(1))
+ demote_headers = self.extras.get("demote-headers")
+ if demote_headers:
+ n = min(n + demote_headers, 6)
+ return "<h%d>%s</h%d>\n\n" \
+ % (n, self._run_span_gamut(match.group(2)), n)
+
+ def _do_headers(self, text):
+ # Setext-style headers:
+ # Header 1
+ # ========
+ #
+ # Header 2
+ # --------
+ text = self._setext_h_re.sub(self._setext_h_sub, text)
+
+ # atx-style headers:
+ # # Header 1
+ # ## Header 2
+ # ## Header 2 with closing hashes ##
+ # ...
+ # ###### Header 6
+ text = self._atx_h_re.sub(self._atx_h_sub, text)
+
+ return text
+
+
+ _marker_ul_chars = '*+-'
+ _marker_any = r'(?:[%s]|\d+\.)' % _marker_ul_chars
+ _marker_ul = '(?:[%s])' % _marker_ul_chars
+ _marker_ol = r'(?:\d+\.)'
+
+ def _list_sub(self, match):
+ lst = match.group(1)
+ lst_type = match.group(3) in self._marker_ul_chars and "ul" or "ol"
+ result = self._process_list_items(lst)
+ if self.list_level:
+ return "<%s>\n%s</%s>\n" % (lst_type, result, lst_type)
+ else:
+ return "<%s>\n%s</%s>\n\n" % (lst_type, result, lst_type)
+
+ def _do_lists(self, text):
+ # Form HTML ordered (numbered) and unordered (bulleted) lists.
+
+ for marker_pat in (self._marker_ul, self._marker_ol):
+ # Re-usable pattern to match any entire ul or ol list:
+ less_than_tab = self.tab_width - 1
+ whole_list = r'''
+ ( # \1 = whole list
+ ( # \2
+ [ ]{0,%d}
+ (%s) # \3 = first list item marker
+ [ \t]+
+ )
+ (?:.+?)
+ ( # \4
+ \Z
+ |
+ \n{2,}
+ (?=\S)
+ (?! # Negative lookahead for another list item marker
+ [ \t]*
+ %s[ \t]+
+ )
+ )
+ )
+ ''' % (less_than_tab, marker_pat, marker_pat)
+
+ # We use a different prefix before nested lists than top-level lists.
+ # See extended comment in _process_list_items().
+ #
+ # Note: There's a bit of duplication here. My original implementation
+ # created a scalar regex pattern as the conditional result of the test on
+ # $g_list_level, and then only ran the $text =~ s{...}{...}egmx
+ # substitution once, using the scalar as the pattern. This worked,
+ # everywhere except when running under MT on my hosting account at Pair
+ # Networks. There, this caused all rebuilds to be killed by the reaper (or
+ # perhaps they crashed, but that seems incredibly unlikely given that the
+ # same script on the same server ran fine *except* under MT. I've spent
+ # more time trying to figure out why this is happening than I'd like to
+ # admit. My only guess, backed up by the fact that this workaround works,
+ # is that Perl optimizes the substition when it can figure out that the
+ # pattern will never change, and when this optimization isn't on, we run
+ # afoul of the reaper. Thus, the slightly redundant code to that uses two
+ # static s/// patterns rather than one conditional pattern.
+
+ if self.list_level:
+ sub_list_re = re.compile("^"+whole_list, re.X | re.M | re.S)
+ text = sub_list_re.sub(self._list_sub, text)
+ else:
+ list_re = re.compile(r"(?:(?<=\n\n)|\A\n?)"+whole_list,
+ re.X | re.M | re.S)
+ text = list_re.sub(self._list_sub, text)
+
+ return text
+
+ _list_item_re = re.compile(r'''
+ (\n)? # leading line = \1
+ (^[ \t]*) # leading whitespace = \2
+ (?P<marker>%s) [ \t]+ # list marker = \3
+ ((?:.+?) # list item text = \4
+ (\n{1,2})) # eols = \5
+ (?= \n* (\Z | \2 (?P<next_marker>%s) [ \t]+))
+ ''' % (_marker_any, _marker_any),
+ re.M | re.X | re.S)
+
+ _last_li_endswith_two_eols = False
+ def _list_item_sub(self, match):
+ item = match.group(4)
+ leading_line = match.group(1)
+ leading_space = match.group(2)
+ if leading_line or "\n\n" in item or self._last_li_endswith_two_eols:
+ item = self._run_block_gamut(self._outdent(item))
+ else:
+ # Recursion for sub-lists:
+ item = self._do_lists(self._outdent(item))
+ if item.endswith('\n'):
+ item = item[:-1]
+ item = self._run_span_gamut(item)
+ self._last_li_endswith_two_eols = (len(match.group(5)) == 2)
+ return "<li>%s</li>\n" % item
+
+ def _process_list_items(self, list_str):
+ # Process the contents of a single ordered or unordered list,
+ # splitting it into individual list items.
+
+ # The $g_list_level global keeps track of when we're inside a list.
+ # Each time we enter a list, we increment it; when we leave a list,
+ # we decrement. If it's zero, we're not in a list anymore.
+ #
+ # We do this because when we're not inside a list, we want to treat
+ # something like this:
+ #
+ # I recommend upgrading to version
+ # 8. Oops, now this line is treated
+ # as a sub-list.
+ #
+ # As a single paragraph, despite the fact that the second line starts
+ # with a digit-period-space sequence.
+ #
+ # Whereas when we're inside a list (or sub-list), that line will be
+ # treated as the start of a sub-list. What a kludge, huh? This is
+ # an aspect of Markdown's syntax that's hard to parse perfectly
+ # without resorting to mind-reading. Perhaps the solution is to
+ # change the syntax rules such that sub-lists must start with a
+ # starting cardinal number; e.g. "1." or "a.".
+ self.list_level += 1
+ self._last_li_endswith_two_eols = False
+ list_str = list_str.rstrip('\n') + '\n'
+ list_str = self._list_item_re.sub(self._list_item_sub, list_str)
+ self.list_level -= 1
+ return list_str
+
+ def _get_pygments_lexer(self, lexer_name):
+ try:
+ from pygments import lexers, util
+ except ImportError:
+ return None
+ try:
+ return lexers.get_lexer_by_name(lexer_name)
+ except util.ClassNotFound:
+ return None
+
+ def _color_with_pygments(self, codeblock, lexer, **formatter_opts):
+ import pygments
+ import pygments.formatters
+
+ class HtmlCodeFormatter(pygments.formatters.HtmlFormatter):
+ def _wrap_code(self, inner):
+ """A function for use in a Pygments Formatter which
+ wraps in <code> tags.
+ """
+ yield 0, "<code>"
+ for tup in inner:
+ yield tup
+ yield 0, "</code>"
+
+ def wrap(self, source, outfile):
+ """Return the source with a code, pre, and div."""
+ return self._wrap_div(self._wrap_pre(self._wrap_code(source)))
+
+ formatter = HtmlCodeFormatter(cssclass="codehilite", **formatter_opts)
+ return pygments.highlight(codeblock, lexer, formatter)
+
+ def _code_block_sub(self, match):
+ codeblock = match.group(1)
+ codeblock = self._outdent(codeblock)
+ codeblock = self._detab(codeblock)
+ codeblock = codeblock.lstrip('\n') # trim leading newlines
+ codeblock = codeblock.rstrip() # trim trailing whitespace
+
+ if "code-color" in self.extras and codeblock.startswith(":::"):
+ lexer_name, rest = codeblock.split('\n', 1)
+ lexer_name = lexer_name[3:].strip()
+ lexer = self._get_pygments_lexer(lexer_name)
+ codeblock = rest.lstrip("\n") # Remove lexer declaration line.
+ if lexer:
+ formatter_opts = self.extras['code-color'] or {}
+ colored = self._color_with_pygments(codeblock, lexer,
+ **formatter_opts)
+ return "\n\n%s\n\n" % colored
+
+ codeblock = self._encode_code(codeblock)
+ return "\n\n<pre><code>%s\n</code></pre>\n\n" % codeblock
+
+ def _do_code_blocks(self, text):
+ """Process Markdown `<pre><code>` blocks."""
+ code_block_re = re.compile(r'''
+ (?:\n\n|\A)
+ ( # $1 = the code block -- one or more lines, starting with a space/tab
+ (?:
+ (?:[ ]{%d} | \t) # Lines must start with a tab or a tab-width of spaces
+ .*\n+
+ )+
+ )
+ ((?=^[ ]{0,%d}\S)|\Z) # Lookahead for non-space at line-start, or end of doc
+ ''' % (self.tab_width, self.tab_width),
+ re.M | re.X)
+
+ return code_block_re.sub(self._code_block_sub, text)
+
+
+ # Rules for a code span:
+ # - backslash escapes are not interpreted in a code span
+ # - to include one or or a run of more backticks the delimiters must
+ # be a longer run of backticks
+ # - cannot start or end a code span with a backtick; pad with a
+ # space and that space will be removed in the emitted HTML
+ # See `test/tm-cases/escapes.text` for a number of edge-case
+ # examples.
+ _code_span_re = re.compile(r'''
+ (?<!\\)
+ (`+) # \1 = Opening run of `
+ (?!`) # See Note A test/tm-cases/escapes.text
+ (.+?) # \2 = The code block
+ (?<!`)
+ \1 # Matching closer
+ (?!`)
+ ''', re.X | re.S)
+
+ def _code_span_sub(self, match):
+ c = match.group(2).strip(" \t")
+ c = self._encode_code(c)
+ return "<code>%s</code>" % c
+
+ def _do_code_spans(self, text):
+ # * Backtick quotes are used for <code></code> spans.
+ #
+ # * You can use multiple backticks as the delimiters if you want to
+ # include literal backticks in the code span. So, this input:
+ #
+ # Just type ``foo `bar` baz`` at the prompt.
+ #
+ # Will translate to:
+ #
+ # <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
+ #
+ # There's no arbitrary limit to the number of backticks you
+ # can use as delimters. If you need three consecutive backticks
+ # in your code, use four for delimiters, etc.
+ #
+ # * You can use spaces to get literal backticks at the edges:
+ #
+ # ... type `` `bar` `` ...
+ #
+ # Turns to:
+ #
+ # ... type <code>`bar`</code> ...
+ return self._code_span_re.sub(self._code_span_sub, text)
+
+ def _encode_code(self, text):
+ """Encode/escape certain characters inside Markdown code runs.
+ The point is that in code, these characters are literals,
+ and lose their special Markdown meanings.
+ """
+ replacements = [
+ # Encode all ampersands; HTML entities are not
+ # entities within a Markdown code span.
+ ('&', '&amp;'),
+ # Do the angle bracket song and dance:
+ ('<', '&lt;'),
+ ('>', '&gt;'),
+ # Now, escape characters that are magic in Markdown:
+ ('*', g_escape_table['*']),
+ ('_', g_escape_table['_']),
+ ('{', g_escape_table['{']),
+ ('}', g_escape_table['}']),
+ ('[', g_escape_table['[']),
+ (']', g_escape_table[']']),
+ ('\\', g_escape_table['\\']),
+ ]
+ for before, after in replacements:
+ text = text.replace(before, after)
+ return text
+
+ _strong_re = re.compile(r"(\*\*|__)(?=\S)(.+?[*_]*)(?<=\S)\1", re.S)
+ _em_re = re.compile(r"(\*|_)(?=\S)(.+?)(?<=\S)\1", re.S)
+ _code_friendly_strong_re = re.compile(r"\*\*(?=\S)(.+?[*_]*)(?<=\S)\*\*", re.S)
+ _code_friendly_em_re = re.compile(r"\*(?=\S)(.+?)(?<=\S)\*", re.S)
+ def _do_italics_and_bold(self, text):
+ # <strong> must go first:
+ if "code-friendly" in self.extras:
+ text = self._code_friendly_strong_re.sub(r"<strong>\1</strong>", text)
+ text = self._code_friendly_em_re.sub(r"<em>\1</em>", text)
+ else:
+ text = self._strong_re.sub(r"<strong>\2</strong>", text)
+ text = self._em_re.sub(r"<em>\2</em>", text)
+ return text
+
+
+ _block_quote_re = re.compile(r'''
+ ( # Wrap whole match in \1
+ (
+ ^[ \t]*>[ \t]? # '>' at the start of a line
+ .+\n # rest of the first line
+ (.+\n)* # subsequent consecutive lines
+ \n* # blanks
+ )+
+ )
+ ''', re.M | re.X)
+ _bq_one_level_re = re.compile('^[ \t]*>[ \t]?', re.M);
+
+ _html_pre_block_re = re.compile(r'(\s*<pre>.+?</pre>)', re.S)
+ def _dedent_two_spaces_sub(self, match):
+ return re.sub(r'(?m)^ ', '', match.group(1))
+
+ def _block_quote_sub(self, match):
+ bq = match.group(1)
+ bq = self._bq_one_level_re.sub('', bq) # trim one level of quoting
+ bq = self._ws_only_line_re.sub('', bq) # trim whitespace-only lines
+ bq = self._run_block_gamut(bq) # recurse
+
+ bq = re.sub('(?m)^', ' ', bq)
+ # These leading spaces screw with <pre> content, so we need to fix that:
+ bq = self._html_pre_block_re.sub(self._dedent_two_spaces_sub, bq)
+
+ return "<blockquote>\n%s\n</blockquote>\n\n" % bq
+
+ def _do_block_quotes(self, text):
+ if '>' not in text:
+ return text
+ return self._block_quote_re.sub(self._block_quote_sub, text)
+
+ def _form_paragraphs(self, text):
+ # Strip leading and trailing lines:
+ text = text.strip('\n')
+
+ # Wrap <p> tags.
+ grafs = []
+ for i, graf in enumerate(re.split(r"\n{2,}", text)):
+ if graf in self.html_blocks:
+ # Unhashify HTML blocks
+ grafs.append(self.html_blocks[graf])
+ else:
+ cuddled_list = None
+ if "cuddled-lists" in self.extras:
+ # Need to put back trailing '\n' for `_list_item_re`
+ # match at the end of the paragraph.
+ li = self._list_item_re.search(graf + '\n')
+ # Two of the same list marker in this paragraph: a likely
+ # candidate for a list cuddled to preceding paragraph
+ # text (issue 33). Note the `[-1]` is a quick way to
+ # consider numeric bullets (e.g. "1." and "2.") to be
+ # equal.
+ if (li and li.group("next_marker")
+ and li.group("marker")[-1] == li.group("next_marker")[-1]):
+ start = li.start()
+ cuddled_list = self._do_lists(graf[start:]).rstrip("\n")
+ assert cuddled_list.startswith("<ul>") or cuddled_list.startswith("<ol>")
+ graf = graf[:start]
+
+ # Wrap <p> tags.
+ graf = self._run_span_gamut(graf)
+ grafs.append("<p>" + graf.lstrip(" \t") + "</p>")
+
+ if cuddled_list:
+ grafs.append(cuddled_list)
+
+ return "\n\n".join(grafs)
+
+ def _add_footnotes(self, text):
+ if self.footnotes:
+ footer = [
+ '<div class="footnotes">',
+ '<hr' + self.empty_element_suffix,
+ '<ol>',
+ ]
+ for i, id in enumerate(self.footnote_ids):
+ if i != 0:
+ footer.append('')
+ footer.append('<li id="fn-%s">' % id)
+ footer.append(self._run_block_gamut(self.footnotes[id]))
+ backlink = ('<a href="#fnref-%s" '
+ 'class="footnoteBackLink" '
+ 'title="Jump back to footnote %d in the text.">'
+ '&#8617;</a>' % (id, i+1))
+ if footer[-1].endswith("</p>"):
+ footer[-1] = footer[-1][:-len("</p>")] \
+ + '&nbsp;' + backlink + "</p>"
+ else:
+ footer.append("\n<p>%s</p>" % backlink)
+ footer.append('</li>')
+ footer.append('</ol>')
+ footer.append('</div>')
+ return text + '\n\n' + '\n'.join(footer)
+ else:
+ return text
+
+ # Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
+ # http://bumppo.net/projects/amputator/
+ _ampersand_re = re.compile(r'&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)')
+ _naked_lt_re = re.compile(r'<(?![a-z/?\$!])', re.I)
+ _naked_gt_re = re.compile(r'''(?<![a-z?!/'"-])>''', re.I)
+
+ def _encode_amps_and_angles(self, text):
+ # Smart processing for ampersands and angle brackets that need
+ # to be encoded.
+ text = self._ampersand_re.sub('&amp;', text)
+
+ # Encode naked <'s
+ text = self._naked_lt_re.sub('&lt;', text)
+
+ # Encode naked >'s
+ # Note: Other markdown implementations (e.g. Markdown.pl, PHP
+ # Markdown) don't do this.
+ text = self._naked_gt_re.sub('&gt;', text)
+ return text
+
+ def _encode_backslash_escapes(self, text):
+ for ch, escape in g_escape_table.items():
+ text = text.replace("\\"+ch, escape)
+ return text
+
+ _auto_link_re = re.compile(r'<((https?|ftp):[^\'">\s]+)>', re.I)
+ def _auto_link_sub(self, match):
+ g1 = match.group(1)
+ return '<a href="%s">%s</a>' % (g1, g1)
+
+ _auto_email_link_re = re.compile(r"""
+ <
+ (?:mailto:)?
+ (
+ [-.\w]+
+ \@
+ [-\w]+(\.[-\w]+)*\.[a-z]+
+ )
+ >
+ """, re.I | re.X | re.U)
+ def _auto_email_link_sub(self, match):
+ return self._encode_email_address(
+ self._unescape_special_chars(match.group(1)))
+
+ def _do_auto_links(self, text):
+ text = self._auto_link_re.sub(self._auto_link_sub, text)
+ text = self._auto_email_link_re.sub(self._auto_email_link_sub, text)
+ return text
+
+ def _encode_email_address(self, addr):
+ # Input: an email address, e.g. "foo@example.com"
+ #
+ # Output: the email address as a mailto link, with each character
+ # of the address encoded as either a decimal or hex entity, in
+ # the hopes of foiling most address harvesting spam bots. E.g.:
+ #
+ # <a href="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
+ # x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
+ # &#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
+ #
+ # Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
+ # mailing list: <http://tinyurl.com/yu7ue>
+ chars = [_xml_encode_email_char_at_random(ch)
+ for ch in "mailto:" + addr]
+ # Strip the mailto: from the visible part.
+ addr = '<a href="%s">%s</a>' \
+ % (''.join(chars), ''.join(chars[7:]))
+ return addr
+
+ def _do_link_patterns(self, text):
+ """Caveat emptor: there isn't much guarding against link
+ patterns being formed inside other standard Markdown links, e.g.
+ inside a [link def][like this].
+
+ Dev Notes: *Could* consider prefixing regexes with a negative
+ lookbehind assertion to attempt to guard against this.
+ """
+ link_from_hash = {}
+ for regex, repl in self.link_patterns:
+ replacements = []
+ for match in regex.finditer(text):
+ if hasattr(repl, "__call__"):
+ href = repl(match)
+ else:
+ href = match.expand(repl)
+ replacements.append((match.span(), href))
+ for (start, end), href in reversed(replacements):
+ escaped_href = (
+ href.replace('"', '&quot;') # b/c of attr quote
+ # To avoid markdown <em> and <strong>:
+ .replace('*', g_escape_table['*'])
+ .replace('_', g_escape_table['_']))
+ link = '<a href="%s">%s</a>' % (escaped_href, text[start:end])
+ hash = _hash_text(link)
+ link_from_hash[hash] = link
+ text = text[:start] + hash + text[end:]
+ for hash, link in link_from_hash.items():
+ text = text.replace(hash, link)
+ return text
+
+ def _unescape_special_chars(self, text):
+ # Swap back in all the special characters we've hidden.
+ for ch, hash in g_escape_table.items():
+ text = text.replace(hash, ch)
+ return text
+
+ def _outdent(self, text):
+ # Remove one level of line-leading tabs or spaces
+ return self._outdent_re.sub('', text)
+
+
+class MarkdownWithExtras(Markdown):
+ """A markdowner class that enables most extras:
+
+ - footnotes
+ - code-color (only has effect if 'pygments' Python module on path)
+
+ These are not included:
+ - pyshell (specific to Python-related documenting)
+ - code-friendly (because it *disables* part of the syntax)
+ - link-patterns (because you need to specify some actual
+ link-patterns anyway)
+ """
+ extras = ["footnotes", "code-color"]
+
+
+#---- internal support functions
+
+# From http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549
+def _curry(*args, **kwargs):
+ function, args = args[0], args[1:]
+ def result(*rest, **kwrest):
+ combined = kwargs.copy()
+ combined.update(kwrest)
+ return function(*args + rest, **combined)
+ return result
+
+# Recipe: regex_from_encoded_pattern (1.0)
+def _regex_from_encoded_pattern(s):
+ """'foo' -> re.compile(re.escape('foo'))
+ '/foo/' -> re.compile('foo')
+ '/foo/i' -> re.compile('foo', re.I)
+ """
+ if s.startswith('/') and s.rfind('/') != 0:
+ # Parse it: /PATTERN/FLAGS
+ idx = s.rfind('/')
+ pattern, flags_str = s[1:idx], s[idx+1:]
+ flag_from_char = {
+ "i": re.IGNORECASE,
+ "l": re.LOCALE,
+ "s": re.DOTALL,
+ "m": re.MULTILINE,
+ "u": re.UNICODE,
+ }
+ flags = 0
+ for char in flags_str:
+ try:
+ flags |= flag_from_char[char]
+ except KeyError:
+ raise ValueError("unsupported regex flag: '%s' in '%s' "
+ "(must be one of '%s')"
+ % (char, s, ''.join(flag_from_char.keys())))
+ return re.compile(s[1:idx], flags)
+ else: # not an encoded regex
+ return re.compile(re.escape(s))
+
+# Recipe: dedent (0.1.2)
+def _dedentlines(lines, tabsize=8, skip_first_line=False):
+ """_dedentlines(lines, tabsize=8, skip_first_line=False) -> dedented lines
+
+ "lines" is a list of lines to dedent.
+ "tabsize" is the tab width to use for indent width calculations.
+ "skip_first_line" is a boolean indicating if the first line should
+ be skipped for calculating the indent width and for dedenting.
+ This is sometimes useful for docstrings and similar.
+
+ Same as dedent() except operates on a sequence of lines. Note: the
+ lines list is modified **in-place**.
+ """
+ DEBUG = False
+ if DEBUG:
+ print "dedent: dedent(..., tabsize=%d, skip_first_line=%r)"\
+ % (tabsize, skip_first_line)
+ indents = []
+ margin = None
+ for i, line in enumerate(lines):
+ if i == 0 and skip_first_line: continue
+ indent = 0
+ for ch in line:
+ if ch == ' ':
+ indent += 1
+ elif ch == '\t':
+ indent += tabsize - (indent % tabsize)
+ elif ch in '\r\n':
+ continue # skip all-whitespace lines
+ else:
+ break
+ else:
+ continue # skip all-whitespace lines
+ if DEBUG: print "dedent: indent=%d: %r" % (indent, line)
+ if margin is None:
+ margin = indent
+ else:
+ margin = min(margin, indent)
+ if DEBUG: print "dedent: margin=%r" % margin
+
+ if margin is not None and margin > 0:
+ for i, line in enumerate(lines):
+ if i == 0 and skip_first_line: continue
+ removed = 0
+ for j, ch in enumerate(line):
+ if ch == ' ':
+ removed += 1
+ elif ch == '\t':
+ removed += tabsize - (removed % tabsize)
+ elif ch in '\r\n':
+ if DEBUG: print "dedent: %r: EOL -> strip up to EOL" % line
+ lines[i] = lines[i][j:]
+ break
+ else:
+ raise ValueError("unexpected non-whitespace char %r in "
+ "line %r while removing %d-space margin"
+ % (ch, line, margin))
+ if DEBUG:
+ print "dedent: %r: %r -> removed %d/%d"\
+ % (line, ch, removed, margin)
+ if removed == margin:
+ lines[i] = lines[i][j+1:]
+ break
+ elif removed > margin:
+ lines[i] = ' '*(removed-margin) + lines[i][j+1:]
+ break
+ else:
+ if removed:
+ lines[i] = lines[i][removed:]
+ return lines
+
+def _dedent(text, tabsize=8, skip_first_line=False):
+ """_dedent(text, tabsize=8, skip_first_line=False) -> dedented text
+
+ "text" is the text to dedent.
+ "tabsize" is the tab width to use for indent width calculations.
+ "skip_first_line" is a boolean indicating if the first line should
+ be skipped for calculating the indent width and for dedenting.
+ This is sometimes useful for docstrings and similar.
+
+ textwrap.dedent(s), but don't expand tabs to spaces
+ """
+ lines = text.splitlines(1)
+ _dedentlines(lines, tabsize=tabsize, skip_first_line=skip_first_line)
+ return ''.join(lines)
+
+
+class _memoized(object):
+ """Decorator that caches a function's return value each time it is called.
+ If called later with the same arguments, the cached value is returned, and
+ not re-evaluated.
+
+ http://wiki.python.org/moin/PythonDecoratorLibrary
+ """
+ def __init__(self, func):
+ self.func = func
+ self.cache = {}
+ def __call__(self, *args):
+ try:
+ return self.cache[args]
+ except KeyError:
+ self.cache[args] = value = self.func(*args)
+ return value
+ except TypeError:
+ # uncachable -- for instance, passing a list as an argument.
+ # Better to not cache than to blow up entirely.
+ return self.func(*args)
+ def __repr__(self):
+ """Return the function's docstring."""
+ return self.func.__doc__
+
+
+def _xml_oneliner_re_from_tab_width(tab_width):
+ """Standalone XML processing instruction regex."""
+ return re.compile(r"""
+ (?:
+ (?<=\n\n) # Starting after a blank line
+ | # or
+ \A\n? # the beginning of the doc
+ )
+ ( # save in $1
+ [ ]{0,%d}
+ (?:
+ <\?\w+\b\s+.*?\?> # XML processing instruction
+ |
+ <\w+:\w+\b\s+.*?/> # namespaced single tag
+ )
+ [ \t]*
+ (?=\n{2,}|\Z) # followed by a blank line or end of document
+ )
+ """ % (tab_width - 1), re.X)
+_xml_oneliner_re_from_tab_width = _memoized(_xml_oneliner_re_from_tab_width)
+
+def _hr_tag_re_from_tab_width(tab_width):
+ return re.compile(r"""
+ (?:
+ (?<=\n\n) # Starting after a blank line
+ | # or
+ \A\n? # the beginning of the doc
+ )
+ ( # save in \1
+ [ ]{0,%d}
+ <(hr) # start tag = \2
+ \b # word break
+ ([^<>])*? #
+ /?> # the matching end tag
+ [ \t]*
+ (?=\n{2,}|\Z) # followed by a blank line or end of document
+ )
+ """ % (tab_width - 1), re.X)
+_hr_tag_re_from_tab_width = _memoized(_hr_tag_re_from_tab_width)
+
+
+def _xml_encode_email_char_at_random(ch):
+ r = random()
+ # Roughly 10% raw, 45% hex, 45% dec.
+ # '@' *must* be encoded. I [John Gruber] insist.
+ # Issue 26: '_' must be encoded.
+ if r > 0.9 and ch not in "@_":
+ return ch
+ elif r < 0.45:
+ # The [1:] is to drop leading '0': 0x63 -> x63
+ return '&#%s;' % hex(ord(ch))[1:]
+ else:
+ return '&#%s;' % ord(ch)
+
+
+
+#---- mainline
+
+class _NoReflowFormatter(optparse.IndentedHelpFormatter):
+ """An optparse formatter that does NOT reflow the description."""
+ def format_description(self, description):
+ return description or ""
+
+def _test():
+ import doctest
+ doctest.testmod()
+
+def main(argv=None):
+ if argv is None:
+ argv = sys.argv
+ if not logging.root.handlers:
+ logging.basicConfig()
+
+ usage = "usage: %prog [PATHS...]"
+ version = "%prog "+__version__
+ parser = optparse.OptionParser(prog="markdown2", usage=usage,
+ version=version, description=cmdln_desc,
+ formatter=_NoReflowFormatter())
+ parser.add_option("-v", "--verbose", dest="log_level",
+ action="store_const", const=logging.DEBUG,
+ help="more verbose output")
+ parser.add_option("--encoding",
+ help="specify encoding of text content")
+ parser.add_option("--html4tags", action="store_true", default=False,
+ help="use HTML 4 style for empty element tags")
+ parser.add_option("-s", "--safe", metavar="MODE", dest="safe_mode",
+ help="sanitize literal HTML: 'escape' escapes "
+ "HTML meta chars, 'replace' replaces with an "
+ "[HTML_REMOVED] note")
+ parser.add_option("-x", "--extras", action="append",
+ help="Turn on specific extra features (not part of "
+ "the core Markdown spec). See above.")
+ parser.add_option("--use-file-vars",
+ help="Look for and use Emacs-style 'markdown-extras' "
+ "file var to turn on extras. See "
+ "<http://code.google.com/p/python-markdown2/wiki/Extras>.")
+ parser.add_option("--link-patterns-file",
+ help="path to a link pattern file")
+ parser.add_option("--self-test", action="store_true",
+ help="run internal self-tests (some doctests)")
+ parser.add_option("--compare", action="store_true",
+ help="run against Markdown.pl as well (for testing)")
+ parser.set_defaults(log_level=logging.INFO, compare=False,
+ encoding="utf-8", safe_mode=None, use_file_vars=False)
+ opts, paths = parser.parse_args()
+ log.setLevel(opts.log_level)
+
+ if opts.self_test:
+ return _test()
+
+ if opts.extras:
+ extras = {}
+ for s in opts.extras:
+ splitter = re.compile("[,;: ]+")
+ for e in splitter.split(s):
+ if '=' in e:
+ ename, earg = e.split('=', 1)
+ try:
+ earg = int(earg)
+ except ValueError:
+ pass
+ else:
+ ename, earg = e, None
+ extras[ename] = earg
+ else:
+ extras = None
+
+ if opts.link_patterns_file:
+ link_patterns = []
+ f = open(opts.link_patterns_file)
+ try:
+ for i, line in enumerate(f.readlines()):
+ if not line.strip(): continue
+ if line.lstrip().startswith("#"): continue
+ try:
+ pat, href = line.rstrip().rsplit(None, 1)
+ except ValueError:
+ raise MarkdownError("%s:%d: invalid link pattern line: %r"
+ % (opts.link_patterns_file, i+1, line))
+ link_patterns.append(
+ (_regex_from_encoded_pattern(pat), href))
+ finally:
+ f.close()
+ else:
+ link_patterns = None
+
+ from os.path import join, dirname, abspath, exists
+ markdown_pl = join(dirname(dirname(abspath(__file__))), "test",
+ "Markdown.pl")
+ for path in paths:
+ if opts.compare:
+ print "==== Markdown.pl ===="
+ perl_cmd = 'perl %s "%s"' % (markdown_pl, path)
+ o = os.popen(perl_cmd)
+ perl_html = o.read()
+ o.close()
+ sys.stdout.write(perl_html)
+ print "==== markdown2.py ===="
+ html = markdown_path(path, encoding=opts.encoding,
+ html4tags=opts.html4tags,
+ safe_mode=opts.safe_mode,
+ extras=extras, link_patterns=link_patterns,
+ use_file_vars=opts.use_file_vars)
+ sys.stdout.write(
+ html.encode(sys.stdout.encoding or "utf-8", 'xmlcharrefreplace'))
+ if opts.compare:
+ test_dir = join(dirname(dirname(abspath(__file__))), "test")
+ if exists(join(test_dir, "test_markdown2.py")):
+ sys.path.insert(0, test_dir)
+ from test_markdown2 import norm_html_from_html
+ norm_html = norm_html_from_html(html)
+ norm_perl_html = norm_html_from_html(perl_html)
+ else:
+ norm_html = html
+ norm_perl_html = perl_html
+ print "==== match? %r ====" % (norm_perl_html == norm_html)
+
+
+if __name__ == "__main__":
+ sys.exit( main(sys.argv) )
+
View
2 models.py
@@ -20,7 +20,7 @@
# * inserted = db.DateTimeProperty( auto_now_add = True )
# * updated = db.DateTimeProperty( auto_now = True )
-type_choices = ["text", "code", "phliky", "textile", "html"]
+type_choices = ["text", "code", "phliky", "textile", "html", "markdown"]
layout_choices = ['content', 'blog', 'faq']
## ----------------------------------------------------------------------------
View
4 util.py
@@ -12,6 +12,7 @@
# local modules
import textile
+import markdown
import phliky
@@ -52,6 +53,9 @@ def render(text, type):
elif type == 'textile':
return textile.textile(text)
+ elif type == 'markdown':
+ return markdown.markdown(text)
+
else:
raise InvalidTypeError(type)

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