152 lines
4.2 KiB
Python
152 lines
4.2 KiB
Python
# Process [link](<to> "stuff")
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from ..common.utils import isStrSpace, normalizeReference
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from .state_inline import StateInline
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def link(state: StateInline, silent: bool) -> bool:
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href = ""
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title = ""
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label = None
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oldPos = state.pos
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maximum = state.posMax
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start = state.pos
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parseReference = True
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if state.src[state.pos] != "[":
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return False
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labelStart = state.pos + 1
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labelEnd = state.md.helpers.parseLinkLabel(state, state.pos, True)
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# parser failed to find ']', so it's not a valid link
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if labelEnd < 0:
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return False
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pos = labelEnd + 1
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if pos < maximum and state.src[pos] == "(":
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#
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# Inline link
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#
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# might have found a valid shortcut link, disable reference parsing
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parseReference = False
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# [link]( <href> "title" )
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# ^^ skipping these spaces
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pos += 1
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while pos < maximum:
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ch = state.src[pos]
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if not isStrSpace(ch) and ch != "\n":
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break
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pos += 1
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if pos >= maximum:
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return False
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# [link]( <href> "title" )
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# ^^^^^^ parsing link destination
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start = pos
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res = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax)
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if res.ok:
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href = state.md.normalizeLink(res.str)
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if state.md.validateLink(href):
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pos = res.pos
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else:
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href = ""
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# [link]( <href> "title" )
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# ^^ skipping these spaces
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start = pos
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while pos < maximum:
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ch = state.src[pos]
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if not isStrSpace(ch) and ch != "\n":
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break
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pos += 1
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# [link]( <href> "title" )
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# ^^^^^^^ parsing link title
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res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax)
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if pos < maximum and start != pos and res.ok:
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title = res.str
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pos = res.pos
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# [link]( <href> "title" )
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# ^^ skipping these spaces
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while pos < maximum:
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ch = state.src[pos]
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if not isStrSpace(ch) and ch != "\n":
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break
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pos += 1
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if pos >= maximum or state.src[pos] != ")":
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# parsing a valid shortcut link failed, fallback to reference
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parseReference = True
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pos += 1
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if parseReference:
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#
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# Link reference
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#
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if "references" not in state.env:
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return False
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if pos < maximum and state.src[pos] == "[":
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start = pos + 1
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pos = state.md.helpers.parseLinkLabel(state, pos)
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if pos >= 0:
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label = state.src[start:pos]
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pos += 1
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else:
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pos = labelEnd + 1
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else:
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pos = labelEnd + 1
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# covers label == '' and label == undefined
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# (collapsed reference link and shortcut reference link respectively)
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if not label:
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label = state.src[labelStart:labelEnd]
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label = normalizeReference(label)
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ref = (
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state.env["references"][label] if label in state.env["references"] else None
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)
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if not ref:
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state.pos = oldPos
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return False
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href = ref["href"]
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title = ref["title"]
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#
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# We found the end of the link, and know for a fact it's a valid link
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# so all that's left to do is to call tokenizer.
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#
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if not silent:
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state.pos = labelStart
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state.posMax = labelEnd
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token = state.push("link_open", "a", 1)
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token.attrs = {"href": href}
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if title:
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token.attrSet("title", title)
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# note, this is not part of markdown-it JS, but is useful for renderers
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if label and state.md.options.get("store_labels", False):
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token.meta["label"] = label
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state.linkLevel += 1
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state.md.inline.tokenize(state)
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state.linkLevel -= 1
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token = state.push("link_close", "a", -1)
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state.pos = pos
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state.posMax = maximum
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return True
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