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- """Process links like https://example.org/"""
- import re
- from .state_inline import StateInline
- # RFC3986: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
- SCHEME_RE = re.compile(r"(?:^|[^a-z0-9.+-])([a-z][a-z0-9.+-]*)$", re.IGNORECASE)
- def linkify(state: StateInline, silent: bool) -> bool:
- """Rule for identifying plain-text links."""
- if not state.md.options.linkify:
- return False
- if state.linkLevel > 0:
- return False
- if not state.md.linkify:
- raise ModuleNotFoundError("Linkify enabled but not installed.")
- pos = state.pos
- maximum = state.posMax
- if (
- (pos + 3) > maximum
- or state.src[pos] != ":"
- or state.src[pos + 1] != "/"
- or state.src[pos + 2] != "/"
- ):
- return False
- if not (match := SCHEME_RE.match(state.pending)):
- return False
- proto = match.group(1)
- if not (link := state.md.linkify.match_at_start(state.src[pos - len(proto) :])):
- return False
- url: str = link.url
- # disallow '*' at the end of the link (conflicts with emphasis)
- url = url.rstrip("*")
- full_url = state.md.normalizeLink(url)
- if not state.md.validateLink(full_url):
- return False
- if not silent:
- state.pending = state.pending[: -len(proto)]
- token = state.push("link_open", "a", 1)
- token.attrs = {"href": full_url}
- token.markup = "linkify"
- token.info = "auto"
- token = state.push("text", "", 0)
- token.content = state.md.normalizeLinkText(url)
- token = state.push("link_close", "a", -1)
- token.markup = "linkify"
- token.info = "auto"
- state.pos += len(url) - len(proto)
- return True
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