# -*- coding: utf-8 -*-
# Copyright (C) 2011-2016 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/
"""
Renderer for markup languages with ability to parse using rst or markdown
"""
import re
import os
import logging
from mako.lookup import TemplateLookup
from docutils.core import publish_parts
from docutils.parsers.rst import directives
import markdown
from rhodecode.lib.markdown_ext import (
UrlizeExtension, GithubFlavoredMarkdownExtension)
from rhodecode.lib.utils2 import safe_unicode, md5_safe, MENTIONS_REGEX
log = logging.getLogger(__name__)
# default renderer used to generate automated comments
DEFAULT_COMMENTS_RENDERER = 'rst'
class MarkupRenderer(object):
RESTRUCTUREDTEXT_DISALLOWED_DIRECTIVES = ['include', 'meta', 'raw']
MARKDOWN_PAT = re.compile(r'\.(md|mkdn?|mdown|markdown)$', re.IGNORECASE)
RST_PAT = re.compile(r'\.re?st$', re.IGNORECASE)
PLAIN_PAT = re.compile(r'^readme$', re.IGNORECASE)
def _detect_renderer(self, source, filename=None):
"""
runs detection of what renderer should be used for generating html
from a markup language
filename can be also explicitly a renderer name
:param source:
:param filename:
"""
if MarkupRenderer.MARKDOWN_PAT.findall(filename):
detected_renderer = 'markdown'
elif MarkupRenderer.RST_PAT.findall(filename):
detected_renderer = 'rst'
elif MarkupRenderer.PLAIN_PAT.findall(filename):
detected_renderer = 'rst'
else:
detected_renderer = 'plain'
return getattr(MarkupRenderer, detected_renderer)
def render(self, source, filename=None):
"""
Renders a given filename using detected renderer
it detects renderers based on file extension or mimetype.
At last it will just do a simple html replacing new lines with <br/>
:param file_name:
:param source:
"""
renderer = self._detect_renderer(source, filename)
readme_data = renderer(source)
return readme_data
@classmethod
def _flavored_markdown(cls, text):
"""
Github style flavored markdown
:param text:
"""
# Extract pre blocks.
extractions = {}
def pre_extraction_callback(matchobj):
digest = md5_safe(matchobj.group(0))
extractions[digest] = matchobj.group(0)
return "{gfm-extraction-%s}" % digest
pattern = re.compile(r'<pre>.*?</pre>', re.MULTILINE | re.DOTALL)
text = re.sub(pattern, pre_extraction_callback, text)
# Prevent foo_bar_baz from ending up with an italic word in the middle.
def italic_callback(matchobj):
s = matchobj.group(0)
if list(s).count('_') >= 2:
return s.replace('_', r'\_')
return s
text = re.sub(r'^(?! {4}|\t)\w+_\w+_\w[\w_]*', italic_callback, text)
# Insert pre block extractions.
def pre_insert_callback(matchobj):
return '\n\n' + extractions[matchobj.group(1)]
text = re.sub(r'\{gfm-extraction-([0-9a-f]{32})\}',
pre_insert_callback, text)
return text
@classmethod
def urlify_text(cls, text):
url_pat = re.compile(r'(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]'
r'|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)')
def url_func(match_obj):
url_full = match_obj.groups()[0]
return '<a href="%(url)s">%(url)s</a>' % ({'url': url_full})
return url_pat.sub(url_func, text)
@classmethod
def plain(cls, source, universal_newline=True):
source = safe_unicode(source)
if universal_newline:
newline = '\n'
source = newline.join(source.splitlines())
source = cls.urlify_text(source)
return '<br />' + source.replace("\n", '<br />')
@classmethod
def markdown(cls, source, safe=True, flavored=True, mentions=False):
# It does not allow to insert inline HTML. In presence of HTML tags, it
# will replace them instead with [HTML_REMOVED]. This is controlled by
# the safe_mode=True parameter of the markdown method.
extensions = ['codehilite', 'extra', 'def_list', 'sane_lists']
if flavored:
extensions.append(GithubFlavoredMarkdownExtension())
if mentions:
mention_pat = re.compile(MENTIONS_REGEX)
def wrapp(match_obj):
uname = match_obj.groups()[0]
return ' **@%(uname)s** ' % {'uname': uname}
mention_hl = mention_pat.sub(wrapp, source).strip()
# we extracted mentions render with this using Mentions false
return cls.markdown(mention_hl, safe=safe, flavored=flavored,
mentions=False)
source = safe_unicode(source)
try:
if flavored:
source = cls._flavored_markdown(source)
return markdown.markdown(
source, extensions, safe_mode=True, enable_attributes=False)
except Exception:
log.exception('Error when rendering Markdown')
if safe:
log.debug('Fallback to render in plain mode')
return cls.plain(source)
else:
raise
@classmethod
def rst(cls, source, safe=True, mentions=False):
if mentions:
mention_pat = re.compile(MENTIONS_REGEX)
def wrapp(match_obj):
uname = match_obj.groups()[0]
return ' **@%(uname)s** ' % {'uname': uname}
mention_hl = mention_pat.sub(wrapp, source).strip()
# we extracted mentions render with this using Mentions false
return cls.rst(mention_hl, safe=safe, mentions=False)
source = safe_unicode(source)
try:
docutils_settings = dict(
[(alias, None) for alias in
cls.RESTRUCTUREDTEXT_DISALLOWED_DIRECTIVES])
docutils_settings.update({'input_encoding': 'unicode',
'report_level': 4})
for k, v in docutils_settings.iteritems():
directives.register_directive(k, v)
parts = publish_parts(source=source,
writer_name="html4css1",
settings_overrides=docutils_settings)
return parts['html_title'] + parts["fragment"]
except Exception:
log.exception('Error when rendering RST')
if safe:
log.debug('Fallbacking to render in plain mode')
return cls.plain(source)
else:
raise
class RstTemplateRenderer(object):
def __init__(self):
base = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
rst_template_dirs = [os.path.join(base, 'templates', 'rst_templates')]
self.template_store = TemplateLookup(
directories=rst_template_dirs,
input_encoding='utf-8',
imports=['from rhodecode.lib import helpers as h'])
def _get_template(self, templatename):
return self.template_store.get_template(templatename)
def render(self, template_name, **kwargs):
template = self._get_template(template_name)
return template.render(**kwargs)