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# Based on https://gist.github.com/mikefromit/5a6fdfecc9310712f15a872df9f41f03
from jinja2 import pass_environment, nodes
from jinja2.ext import Extension
import mistletoe as md
from mistletoe.contrib.mathjax import MathJaxRenderer
@pass_environment
def markdown(env, value):
"""
Markdown filter with support for extensions.
"""
output = value
return md.markdown(output, MathJaxRenderer)
class Markdown(Extension):
"""
A wrapper around the markdown filter for syntactic sugar.
"""
tags = set(["markdown"])
def parse(self, parser): # pragma: no cover
"""
Parses the statements and defers to the callback
for markdown processing.
"""
lineno = next(parser.stream).lineno
body = parser.parse_statements(["name:endmarkdown"], drop_needle=True)
return nodes.CallBlock(
self.call_method("_render_markdown"), [], [], body
).set_lineno(lineno)
def _render_markdown(self, caller=None): # pragma: no cover
"""
Calls the markdown filter to transform the output.
"""
if not caller:
return ""
output = caller().strip()
return markdown(self.environment, output)
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