markdown_it.rules_core.linkify 源代码

import re

from ..common.utils import arrayReplaceAt
from .state_core import StateCore
from ..token import Token


LINK_OPEN_RE = re.compile(r"^<a[>\s]", flags=re.IGNORECASE)
LINK_CLOSE_RE = re.compile(r"^</a\s*>", flags=re.IGNORECASE)

HTTP_RE = re.compile(r"^http://")
MAILTO_RE = re.compile(r"^mailto:")
TEST_MAILTO_RE = re.compile(r"^mailto:", flags=re.IGNORECASE)


[文档]def isLinkOpen(string: str) -> bool: return bool(LINK_OPEN_RE.search(string))
[文档]def isLinkClose(string: str) -> bool: return bool(LINK_CLOSE_RE.search(string))
[文档]def linkify(state: StateCore) -> None: blockTokens = state.tokens if not state.md.options.linkify: return if not state.md.linkify: raise ModuleNotFoundError("Linkify enabled but not installed.") for j in range(len(blockTokens)): if blockTokens[j].type != "inline" or not state.md.linkify.pretest( blockTokens[j].content ): continue tokens = blockTokens[j].children htmlLinkLevel = 0 # We scan from the end, to keep position when new tags added. # Use reversed logic in links start/end match assert tokens is not None i = len(tokens) while i >= 1: i -= 1 assert isinstance(tokens, list) currentToken = tokens[i] # Skip content of markdown links if currentToken.type == "link_close": i -= 1 while ( tokens[i].level != currentToken.level and tokens[i].type != "link_open" ): i -= 1 continue # Skip content of html tag links if currentToken.type == "html_inline": if isLinkOpen(currentToken.content) and htmlLinkLevel > 0: htmlLinkLevel -= 1 if isLinkClose(currentToken.content): htmlLinkLevel += 1 if htmlLinkLevel > 0: continue if currentToken.type == "text" and state.md.linkify.test( currentToken.content ): text = currentToken.content links = state.md.linkify.match(text) # Now split string to nodes nodes = [] level = currentToken.level lastPos = 0 for ln in range(len(links)): url = links[ln].url fullUrl = state.md.normalizeLink(url) if not state.md.validateLink(fullUrl): continue urlText = links[ln].text # Linkifier might send raw hostnames like "example.com", where url # starts with domain name. So we prepend http:// in those cases, # and remove it afterwards. if not links[ln].schema: urlText = HTTP_RE.sub( "", state.md.normalizeLinkText("http://" + urlText) ) elif links[ln].schema == "mailto:" and TEST_MAILTO_RE.search( urlText ): urlText = MAILTO_RE.sub( "", state.md.normalizeLinkText("mailto:" + urlText) ) else: urlText = state.md.normalizeLinkText(urlText) pos = links[ln].index if pos > lastPos: token = Token("text", "", 0) token.content = text[lastPos:pos] token.level = level nodes.append(token) token = Token("link_open", "a", 1) token.attrs = {"href": fullUrl} token.level = level level += 1 token.markup = "linkify" token.info = "auto" nodes.append(token) token = Token("text", "", 0) token.content = urlText token.level = level nodes.append(token) token = Token("link_close", "a", -1) level -= 1 token.level = level token.markup = "linkify" token.info = "auto" nodes.append(token) lastPos = links[ln].last_index if lastPos < len(text): token = Token("text", "", 0) token.content = text[lastPos:] token.level = level nodes.append(token) blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes)