mistune.py
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	# This file is part of Invenio.
	# Copyright (C) 2013, 2014 CERN.
	#
	# Invenio is free software; you can redistribute it and/or
	# modify it under the terms of the GNU General Public License as
	# published by the Free Software Foundation; either version 2 of the
	# License, or (at your option) any later version.
	#
	# Invenio 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 General Public License
	# along with Invenio; if not, write to the Free Software Foundation, Inc.,
	# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

	"""Markdown rendering using mistune library."""

	from __future__ import absolute_import

	import mistune

	from flask import render_template, request

	from invenio.ext.cache import cache


	@cache.memoize(timeout=2*86400)
	def render(f):
	"""Render HTML from Markdown file content."""
	with open(f.fullpath, 'rU') as mdfile:
	return mistune.markdown(mdfile.read())


	def can_preview(f):
	"""Determine if file can be previewed."""
	return f.superformat.lower() == '.md'


	def preview(f):
	"""Render Markdown."""
	return render_template("previewer/mistune.html", f=f,
	content=render(f),
	embed=request.args.get('embed', type=bool))