102 lines
2.5 KiB
Python
102 lines
2.5 KiB
Python
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# fences (``` lang, ~~~ lang)
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import logging
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from .state_block import StateBlock
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LOGGER = logging.getLogger(__name__)
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def fence(state: StateBlock, startLine: int, endLine: int, silent: bool) -> bool:
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LOGGER.debug("entering fence: %s, %s, %s, %s", state, startLine, endLine, silent)
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haveEndMarker = False
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pos = state.bMarks[startLine] + state.tShift[startLine]
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maximum = state.eMarks[startLine]
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if state.is_code_block(startLine):
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return False
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if pos + 3 > maximum:
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return False
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marker = state.src[pos]
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if marker not in ("~", "`"):
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return False
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# scan marker length
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mem = pos
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pos = state.skipCharsStr(pos, marker)
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length = pos - mem
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if length < 3:
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return False
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markup = state.src[mem:pos]
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params = state.src[pos:maximum]
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if marker == "`" and marker in params:
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return False
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# Since start is found, we can report success here in validation mode
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if silent:
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return True
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# search end of block
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nextLine = startLine
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while True:
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nextLine += 1
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if nextLine >= endLine:
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# unclosed block should be autoclosed by end of document.
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# also block seems to be autoclosed by end of parent
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break
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pos = mem = state.bMarks[nextLine] + state.tShift[nextLine]
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maximum = state.eMarks[nextLine]
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if pos < maximum and state.sCount[nextLine] < state.blkIndent:
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# non-empty line with negative indent should stop the list:
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# - ```
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# test
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break
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try:
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if state.src[pos] != marker:
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continue
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except IndexError:
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break
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if state.is_code_block(nextLine):
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continue
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pos = state.skipCharsStr(pos, marker)
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# closing code fence must be at least as long as the opening one
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if pos - mem < length:
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continue
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# make sure tail has spaces only
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pos = state.skipSpaces(pos)
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if pos < maximum:
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continue
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haveEndMarker = True
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# found!
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break
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# If a fence has heading spaces, they should be removed from its inner block
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length = state.sCount[startLine]
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state.line = nextLine + (1 if haveEndMarker else 0)
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token = state.push("fence", "code", 0)
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token.info = params
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token.content = state.getLines(startLine + 1, nextLine, length, True)
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token.markup = markup
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token.map = [startLine, state.line]
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return True
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