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# fences (``` lang, ~~~ lang)
import logging
from .state_block import StateBlock
LOGGER = logging.getLogger(__name__)
def fence(state: StateBlock, startLine: int, endLine: int, silent: bool) -> 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 state.is_code_block(startLine):
return False
if pos + 3 > maximum:
return False
marker = state.src[pos]
if marker not in ("~", "`"):
return False
# scan marker length
mem = pos
pos = state.skipCharsStr(pos, marker)
length = pos - mem
if length < 3:
return False
markup = state.src[mem:pos]
params = state.src[pos:maximum]
if marker == "`" and 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
try:
if state.src[pos] != marker:
continue
except IndexError:
break
if state.is_code_block(nextLine):
continue
pos = state.skipCharsStr(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 = params
token.content = state.getLines(startLine + 1, nextLine, length, True)
token.markup = markup
token.map = [startLine, state.line]
return True