37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
# Copyright (c) 2022 Tulir Asokan
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import commonmark
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class HtmlEscapingRenderer(commonmark.HtmlRenderer):
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def __init__(self, allow_html: bool = False):
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super().__init__()
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self.allow_html = allow_html
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def lit(self, s):
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if self.allow_html:
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return super().lit(s)
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return super().lit(s.replace("<", "<").replace(">", ">"))
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def image(self, node, entering):
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prev = self.allow_html
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self.allow_html = True
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super().image(node, entering)
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self.allow_html = prev
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md_parser = commonmark.Parser()
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yes_html_renderer = commonmark.HtmlRenderer()
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no_html_renderer = HtmlEscapingRenderer()
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def render(message: str, allow_html: bool = False) -> str:
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parsed = md_parser.parse(message)
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if allow_html:
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return yes_html_renderer.render(parsed)
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else:
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return no_html_renderer.render(parsed)
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