markdown_it.rules_block.html_block 源代码

# HTML block
import logging
import re
from typing import List, Tuple, Pattern

from .state_block import StateBlock
from ..common.html_blocks import block_names
from ..common.html_re import HTML_OPEN_CLOSE_TAG_STR

LOGGER = logging.getLogger(__name__)

# An array of opening and corresponding closing sequences for html tags,
# last argument defines whether it can terminate a paragraph or not
HTML_SEQUENCES: List[Tuple[Pattern, Pattern, bool]] = [
    (
        re.compile(r"^<(script|pre|style|textarea)(?=(\s|>|$))", re.IGNORECASE),
        re.compile(r"<\/(script|pre|style|textarea)>", re.IGNORECASE),
        True,
    ),
    (re.compile(r"^<!--"), re.compile(r"-->"), True),
    (re.compile(r"^<\?"), re.compile(r"\?>"), True),
    (re.compile(r"^<![A-Z]"), re.compile(r">"), True),
    (re.compile(r"^<!\[CDATA\["), re.compile(r"\]\]>"), True),
    (
        re.compile("^</?(" + "|".join(block_names) + ")(?=(\\s|/?>|$))", re.IGNORECASE),
        re.compile(r"^$"),
        True,
    ),
    (re.compile(HTML_OPEN_CLOSE_TAG_STR + "\\s*$"), re.compile(r"^$"), False),
]


[文档]def html_block(state: StateBlock, startLine: int, endLine: int, silent: bool): LOGGER.debug( "entering html_block: %s, %s, %s, %s", state, startLine, endLine, silent ) pos = state.bMarks[startLine] + state.tShift[startLine] maximum = state.eMarks[startLine] # if it's indented more than 3 spaces, it should be a code block if state.sCount[startLine] - state.blkIndent >= 4: return False if not state.md.options.get("html", None): return False if state.srcCharCode[pos] != 0x3C: # /* < */ return False lineText = state.src[pos:maximum] html_seq = None for HTML_SEQUENCE in HTML_SEQUENCES: if HTML_SEQUENCE[0].search(lineText): html_seq = HTML_SEQUENCE break if not html_seq: return False if silent: # true if this sequence can be a terminator, false otherwise return html_seq[2] nextLine = startLine + 1 # If we are here - we detected HTML block. # Let's roll down till block end. if not html_seq[1].search(lineText): while nextLine < endLine: if state.sCount[nextLine] < state.blkIndent: break pos = state.bMarks[nextLine] + state.tShift[nextLine] maximum = state.eMarks[nextLine] lineText = state.src[pos:maximum] if html_seq[1].search(lineText): if len(lineText) != 0: nextLine += 1 break nextLine += 1 state.line = nextLine token = state.push("html_block", "", 0) token.map = [startLine, nextLine] token.content = state.getLines(startLine, nextLine, state.blkIndent, True) return True