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