markdown_it.rules_block.fence 源代码

# fences (``` lang, ~~~ lang)
import logging

from ..common.utils import stripEscape
from .state_block import StateBlock

LOGGER = logging.getLogger(__name__)


[文档]def fence(state: StateBlock, startLine: int, endLine: int, silent: bool): LOGGER.debug("entering fence: %s, %s, %s, %s", state, startLine, endLine, silent) haveEndMarker = False 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 pos + 3 > maximum: return False marker = state.srcCharCode[pos] # /* ~ */ /* ` */ if marker != 0x7E and marker != 0x60: return False # scan marker length mem = pos pos = state.skipChars(pos, marker) length = pos - mem if length < 3: return False markup = state.src[mem:pos] params = state.src[pos:maximum] # /* ` */ if marker == 0x60: if chr(marker) in params: return False # Since start is found, we can report success here in validation mode if silent: return True # search end of block nextLine = startLine while True: nextLine += 1 if nextLine >= endLine: # unclosed block should be autoclosed by end of document. # also block seems to be autoclosed by end of parent break pos = mem = state.bMarks[nextLine] + state.tShift[nextLine] maximum = state.eMarks[nextLine] if pos < maximum and state.sCount[nextLine] < state.blkIndent: # non-empty line with negative indent should stop the list: # - ``` # test break if state.srcCharCode[pos] != marker: continue if state.sCount[nextLine] - state.blkIndent >= 4: # closing fence should be indented less than 4 spaces continue pos = state.skipChars(pos, marker) # closing code fence must be at least as long as the opening one if pos - mem < length: continue # make sure tail has spaces only pos = state.skipSpaces(pos) if pos < maximum: continue haveEndMarker = True # found! break # If a fence has heading spaces, they should be removed from its inner block length = state.sCount[startLine] state.line = nextLine + (1 if haveEndMarker else 0) token = state.push("fence", "code", 0) token.info = stripEscape(params) token.content = state.getLines(startLine + 1, nextLine, length, True) token.markup = markup token.map = [startLine, state.line] return True