git.scottworley.com Git - paperdoorknob/blob - domfilter.py

   1 # paperdoorknob: Print glowfic
   2 #
   3 # This program is free software: you can redistribute it and/or modify it
   4 # under the terms of the GNU General Public License as published by the
   5 # Free Software Foundation, version 3.
   6
   7
   8 from typing import Any, Callable, List, Tuple
   9
  10 from bs4.element import Tag
  11
  12
  13 def _changeTag(tag: Tag, new_name: str) -> Tag:
  14     tag.name = new_name
  15     return tag
  16
  17
  18 DOMFilters: List[Tuple[str, Callable[[Tag], Any]]] = [
  19     ("Strike", lambda x: [_changeTag(span, 's')
  20                           for span in x.find_all("span", style="text-decoration: line-through;")]),
  21 ]
  22
  23
  24 class DOMFilterError(Exception):
  25     pass
  26
  27
  28 def ApplyDOMFilters(filter_list: str, tag: Tag) -> None:
  29     for filter_name in filter_list.split(','):
  30         filters = [f for (name, f) in DOMFilters if name == filter_name]
  31         if len(filters) == 0:
  32             raise DOMFilterError(f"Unknown DOM filter: {filter_name}")
  33         if len(filters) > 1:
  34             raise DOMFilterError(
  35                 f"Multiple DOM filters with the same name!?: {filter_name}")
  36         filters[0](tag)