mirror of
https://github.com/Mayuri-Chan/pyrofork.git
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111 lines
3.3 KiB
Python
111 lines
3.3 KiB
Python
# Pyrogram - Telegram MTProto API Client Library for Python
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# Copyright (C) 2017-2019 Dan Tès <https://github.com/delivrance>
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#
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# This file is part of Pyrogram.
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#
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# Pyrogram is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Pyrogram is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.
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import html
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import re
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import pyrogram
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from .html import HTML
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class Markdown:
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BOLD_DELIM = "**"
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ITALIC_DELIM = "__"
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UNDERLINE_DELIM = "--"
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STRIKE_DELIM = "~~"
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CODE_DELIM = "`"
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PRE_DELIM = "```"
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MARKDOWN_RE = re.compile(r"({d})".format(
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d="|".join(
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["".join(i) for i in [
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[r"\{}".format(j) for j in i]
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for i in [
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PRE_DELIM,
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CODE_DELIM,
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STRIKE_DELIM,
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UNDERLINE_DELIM,
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ITALIC_DELIM,
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BOLD_DELIM
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]
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]]
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)))
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URL_RE = re.compile(r"\[([^[]+)]\(([^(]+)\)")
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OPENING_TAG = "<{}>"
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CLOSING_TAG = "</{}>"
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URL_MARKUP = '<a href="{}">{}</a>'
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FIXED_WIDTH_DELIMS = [CODE_DELIM, PRE_DELIM]
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def __init__(self, client: "pyrogram.BaseClient"):
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self.html = HTML(client)
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def parse(self, text: str):
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text = html.escape(text)
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offset = 0
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delims = set()
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for i, match in enumerate(re.finditer(Markdown.MARKDOWN_RE, text)):
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start, stop = match.span()
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delim = match.group(1)
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if delim == Markdown.BOLD_DELIM:
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tag = "b"
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elif delim == Markdown.ITALIC_DELIM:
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tag = "i"
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elif delim == Markdown.UNDERLINE_DELIM:
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tag = "u"
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elif delim == Markdown.STRIKE_DELIM:
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tag = "s"
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elif delim == Markdown.CODE_DELIM:
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tag = "code"
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elif delim == Markdown.PRE_DELIM:
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tag = "pre"
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else:
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continue
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if delim not in Markdown.FIXED_WIDTH_DELIMS and any(x in delims for x in Markdown.FIXED_WIDTH_DELIMS):
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continue
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if delim not in delims:
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delims.add(delim)
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tag = Markdown.OPENING_TAG.format(tag)
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else:
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delims.remove(delim)
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tag = Markdown.CLOSING_TAG.format(tag)
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text = text[:start + offset] + tag + text[stop + offset:]
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offset += len(tag) - len(delim)
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offset = 0
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for match in re.finditer(Markdown.URL_RE, text):
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start, stop = match.span()
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full = match.group(0)
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body, url = match.groups()
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replace = Markdown.URL_MARKUP.format(url, body)
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text = text[:start + offset] + replace + text[stop + offset:]
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offset += len(replace) - len(full)
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return self.html.parse(text)
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