Tulir Asokan
88 lines
2.8 KiB
Python
88 lines
2.8 KiB
Python
# -*- coding: future_fstrings -*-
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# mautrix-telegram - A Matrix-Telegram puppeting bridge
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# Copyright (C) 2018 Tulir Asokan
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# 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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# This program 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 Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from html import escape
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from typing import Optional
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import struct
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import re
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# add_surrogates and remove_surrogates are unicode surrogate utility functions from Telethon.
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# Licensed under the MIT license.
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# https://github.com/LonamiWebs/Telethon/blob/master/telethon/extensions/markdown.py
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def add_surrogates(text: Optional[str]) -> Optional[str]:
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if text is None:
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return None
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return "".join("".join(chr(y) for y in struct.unpack("<HH", x.encode("utf-16-le")))
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if (0x10000 <= ord(x) <= 0x10FFFF) else x for x in text)
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def remove_surrogates(text: Optional[str]) -> Optional[str]:
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if text is None:
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return None
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return text.encode("utf-16", "surrogatepass").decode("utf-16")
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def trim_reply_fallback_text(text: str) -> str:
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if not text.startswith("> ") or "\n" not in text:
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return text
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lines = text.split("\n")
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while len(lines) > 0 and lines[0].startswith("> "):
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lines.pop(0)
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return "\n".join(lines)
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html_reply_fallback_regex = re.compile("^<blockquote data-mx-reply>"
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r"[\s\S]+?"
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"(</forward></blockquote>)?"
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"</blockquote>")
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def trim_reply_fallback_html(html: str) -> str:
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return html_reply_fallback_regex.sub("", html)
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def unicode_to_html(text: str, html: str, ctrl: str, tag: str) -> str:
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if ctrl not in text:
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return html
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if not html:
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html = escape(text)
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tag_start = f"<{tag}>"
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tag_end = f"</{tag}>"
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characters = html.split(ctrl)
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html = ""
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in_tag = False
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for char in characters:
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if not in_tag:
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if len(char) > 1:
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html += char[0:-1]
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char = char[-1]
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html += tag_start
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in_tag = True
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html += char
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else:
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if len(char) > 1:
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html += tag_end
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in_tag = False
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html += char
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if in_tag:
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html += tag_end
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return html
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def html_to_unicode(text: str, ctrl: str) -> str:
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return ctrl.join(text) + ctrl
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