Evaluate the id portion of `[ref][id]`. If `[ref][]` use `[ref]`.
(self, data: str, index: int, text: str)
| 902 | return self.makeTag(href, title, text), m.start(0), end |
| 903 | |
| 904 | def evalId(self, data: str, index: int, text: str) -> tuple[str | None, int, bool]: |
| 905 | """ |
| 906 | Evaluate the id portion of `[ref][id]`. |
| 907 | |
| 908 | If `[ref][]` use `[ref]`. |
| 909 | """ |
| 910 | m = self.RE_LINK.match(data, pos=index) |
| 911 | if not m: |
| 912 | return None, index, False |
| 913 | else: |
| 914 | id = m.group(1).lower() |
| 915 | end = m.end(0) |
| 916 | if not id: |
| 917 | id = text.lower() |
| 918 | return id, end, True |
| 919 | |
| 920 | def makeTag(self, href: str, title: str, text: str) -> etree.Element: |
| 921 | """ Return an `a` [`Element`][xml.etree.ElementTree.Element]. """ |