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honeycomb_markdown.py
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honeycomb_markdown.py
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import hashlib
import re
from django.contrib.auth.models import User
from django.core.urlresolvers import reverse
from markdown.preprocessors import Preprocessor
from markdown.extensions import Extension
from markdown.inlinepatterns import Pattern
from markdown.postprocessors import Postprocessor
from markdown.util import etree
TABLEFIX_RE = re.compile(r'<table>')
DLFIX_RE = re.compile(r'<dl>')
ABBRFIX_RE = re.compile(r'<abbr title="([^"]+)">([^</abbr>]+)</abbr>')
USERNAME_PATTERN_NAME = r'~([\w-]+)'
USERNAME_PATTERN_ICON = r'@!([\w-]+)'
USERNAME_PATTERN_ICONNAME = r'@([\w-]+)'
POETRY_PATTERN = r"'''([^''']+)'''"
class Poetry(Preprocessor):
RE = re.compile(
r'''(?P<quotes>'{3})(?P<body>.*?)(?P=quotes)''',
re.DOTALL)
def repl(self, m):
return '<div style="white-space:pre-wrap">{}</div>'.format(
m.group('body'))
def run(self, lines):
text = '\n'.join(lines)
text = re.sub(self.RE, self.repl, text)
return text.split('\n')
class HoneycombUserName(Pattern):
def handleMatch(self, m):
el = etree.Element('a')
el.set('href', reverse('usermgmt:view_profile', args=(m.group(2),)))
el.set('class', 'name-user-link')
el.text = '~{}'.format(m.group(2))
return el
class HoneycombUserIcon(Pattern):
fetched_users = {}
def handleMatch(self, m):
try:
if m.group(2) in self.fetched_users:
user = self.fetched_users[m.group(2)]
else:
user = User.objects.get(username=m.group(2))
self.fetched_users[m.group(2)] = user
el = etree.Element('a')
el.set('href', reverse('usermgmt:view_profile',
args=(m.group(2),)))
el.set('class', 'icon-user-link')
el.text = ('![gravatar]'
'(https://www.gravatar.com/avatar/{}?s=50)').format(
hashlib.md5(
user.email.strip().lower().encode('utf-8')
).hexdigest(),
m.group(2))
return el
except User.DoesNotExist:
el = etree.Element('a')
el.set('href', reverse('usermgmt:view_profile',
args=(m.group(3),)))
el.set('class', 'user-link')
el.text = m.group(2)
return el
class HoneycombUserIconName(Pattern):
fetched_users = {}
def handleMatch(self, m):
try:
if m.group(2) in self.fetched_users:
user = self.fetched_users[m.group(2)]
else:
user = User.objects.get(username=m.group(2))
self.fetched_users[m.group(2)] = user
el = etree.Element('a')
el.set('href', reverse('usermgmt:view_profile',
args=(m.group(2),)))
el.set('class', 'icon-name-user-link')
el.text = (' '
'{}').format(
hashlib.md5(
user.email.strip().lower().encode('utf-8')
).hexdigest(),
m.group(2))
return el
except User.DoesNotExist:
el = etree.Element('a')
el.set('href', reverse('usermgmt:view_profile',
args=(m.group(3),)))
el.set('class', 'user-link')
el.text = m.group(2)
return el
class TableFix(Postprocessor):
def run(self, text):
return TABLEFIX_RE.sub(
r'<table class="table table-striped table-hover">', text)
class DLFix(Postprocessor):
def run(self, text):
return DLFIX_RE.sub(r'<dl class="dl-indent">', text)
class ABBRFix(Postprocessor):
def run(self, text):
return re.sub(
ABBRFIX_RE,
r'<abbr data-toggle="tooltip" '
r'data-placement="bottom" '
r'title="\1">\2</abbr>', text)
class HoneycombMarkdown(Extension):
def extendMarkdown(self, md, md_globals):
md.preprocessors['poetry'] = Poetry(md)
md.inlinePatterns.add(
'honeycomb_user_icon',
HoneycombUserIcon(USERNAME_PATTERN_ICON),
'<image_link')
md.inlinePatterns.add(
'honeycomb_user_iconname',
HoneycombUserIconName(USERNAME_PATTERN_ICONNAME),
'<image_link')
md.inlinePatterns['honeycomb_user_name'] = HoneycombUserName(
USERNAME_PATTERN_NAME)
md.postprocessors['tablefix'] = TableFix(md)
md.postprocessors['dlfix'] = DLFix(md)
md.postprocessors['abbrfix'] = ABBRFix(md)
class HoneycombMarkdownLite(Extension):
def extendMarkdown(self, md, md_globals):
md.preprocessors['poetry'] = Poetry(md)
md.postprocessors['tablefix'] = TableFix(md)
md.postprocessors['dlfix'] = DLFix(md)
md.postprocessors['abbrfix'] = ABBRFix(md)