Function reference

markdown_it/rules_block/reference.py:9–192

(state: StateBlock, startLine: int, _endLine: int, silent: bool)

def reference(state: StateBlock, startLine: int, _endLine: int, silent: bool) -> bool:
    LOGGER.debug(
        "entering reference: %s, %s, %s, %s", state, startLine, _endLine, silent
    )

    pos = state.bMarks[startLine] + state.tShift[startLine]
    maximum = state.eMarks[startLine]
    nextLine = startLine + 1

    if state.is_code_block(startLine):
        return False

    if state.src[pos] != "[":
        return False

    string = state.src[pos : maximum + 1]

    # string = state.getLines(startLine, nextLine, state.blkIndent, False).strip()
    maximum = len(string)

    labelEnd = None
    pos = 1
    while pos < maximum:
        ch = charCodeAt(string, pos)
        if ch == 0x5B:  # /* [ */
            return False
        elif ch == 0x5D:  # /* ] */
            labelEnd = pos
            break
        elif ch == 0x0A:  # /* \n */
            if (lineContent := getNextLine(state, nextLine)) is not None:
                string += lineContent
                maximum = len(string)
                nextLine += 1
        elif ch == 0x5C:  # /* \ */
            pos += 1
            if (
                pos < maximum
                and charCodeAt(string, pos) == 0x0A
                and (lineContent := getNextLine(state, nextLine)) is not None
            ):
                string += lineContent
                maximum = len(string)
                nextLine += 1
        pos += 1

    if (
        labelEnd is None or labelEnd < 0 or charCodeAt(string, labelEnd + 1) != 0x3A
    ):  # /* : */
        return False

    # [label]:   destination   'title'
    #         ^^^ skip optional whitespace here
    pos = labelEnd + 2
    while pos < maximum:
        ch = charCodeAt(string, pos)
        if ch == 0x0A:
            if (lineContent := getNextLine(state, nextLine)) is not None: