Tulir Asokan
66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
# mautrix-telegram - A Matrix-Telegram puppeting bridge
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# Copyright (C) 2019 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 typing import Dict, List, Tuple
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from html.parser import HTMLParser
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class HTMLNode(list):
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def __init__(self, tag: str, attrs: List[Tuple[str, str]]):
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super().__init__()
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self.tag = tag # type: str
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self.text = "" # type: str
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self.tail = "" # type: str
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self.attrib = dict(attrs) # type: Dict[str, str]
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class NodeifyingParser(HTMLParser):
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# From https://www.w3.org/TR/html5/syntax.html#writing-html-documents-elements
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void_tags = ("area", "base", "br", "col", "command", "embed", "hr", "img", "input", "link",
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"meta", "param", "source", "track", "wbr")
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def __init__(self):
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super().__init__()
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self.stack = [HTMLNode("html", [])] # type: List[HTMLNode]
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def handle_starttag(self, tag, attrs):
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node = HTMLNode(tag, attrs)
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self.stack[-1].append(node)
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if tag not in self.void_tags:
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self.stack.append(node)
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def handle_startendtag(self, tag, attrs):
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self.stack[-1].append(HTMLNode(tag, attrs))
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def handle_endtag(self, tag):
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if tag == self.stack[-1].tag:
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self.stack.pop()
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def handle_data(self, data):
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if len(self.stack[-1]) > 0:
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self.stack[-1][-1].tail += data
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else:
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self.stack[-1].text += data
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def error(self, message):
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pass
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def read_html(data: str) -> HTMLNode:
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parser = NodeifyingParser()
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parser.feed(data)
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return parser.stack[0]
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