markdown_it.rules_block.blockquote 源代码

# Block quotes
import logging
from typing import Optional

from .state_block import StateBlock
from ..common.utils import isSpace

LOGGER = logging.getLogger(__name__)


[文档]def blockquote(state: StateBlock, startLine: int, endLine: int, silent: bool): LOGGER.debug( "entering blockquote: %s, %s, %s, %s", state, startLine, endLine, silent ) oldLineMax = state.lineMax pos = state.bMarks[startLine] + state.tShift[startLine] max = 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 # check the block quote marker if state.srcCharCode[pos] != 0x3E: # /* > */ return False pos += 1 # we know that it's going to be a valid blockquote, # so no point trying to find the end of it in silent mode if silent: return True # set offset past spaces and ">" initial = offset = state.sCount[startLine] + 1 try: second_char_code: Optional[int] = state.srcCharCode[pos] except IndexError: second_char_code = None # skip one optional space after '>' if second_char_code == 0x20: # /* space */ # ' > test ' # ^ -- position start of line here: pos += 1 initial += 1 offset += 1 adjustTab = False spaceAfterMarker = True elif second_char_code == 0x09: # /* tab */ spaceAfterMarker = True if (state.bsCount[startLine] + offset) % 4 == 3: # ' >\t test ' # ^ -- position start of line here (tab has width==1) pos += 1 initial += 1 offset += 1 adjustTab = False else: # ' >\t test ' # ^ -- position start of line here + shift bsCount slightly # to make extra space appear adjustTab = True else: spaceAfterMarker = False oldBMarks = [state.bMarks[startLine]] state.bMarks[startLine] = pos while pos < max: ch = state.srcCharCode[pos] if isSpace(ch): if ch == 0x09: # / tab / offset += ( 4 - (offset + state.bsCount[startLine] + (1 if adjustTab else 0)) % 4 ) else: offset += 1 else: break pos += 1 oldBSCount = [state.bsCount[startLine]] state.bsCount[startLine] = ( state.sCount[startLine] + 1 + (1 if spaceAfterMarker else 0) ) lastLineEmpty = pos >= max oldSCount = [state.sCount[startLine]] state.sCount[startLine] = offset - initial oldTShift = [state.tShift[startLine]] state.tShift[startLine] = pos - state.bMarks[startLine] terminatorRules = state.md.block.ruler.getRules("blockquote") oldParentType = state.parentType state.parentType = "blockquote" # Search the end of the block # # Block ends with either: # 1. an empty line outside: # ``` # > test # # ``` # 2. an empty line inside: # ``` # > # test # ``` # 3. another tag: # ``` # > test # - - - # ``` # for (nextLine = startLine + 1; nextLine < endLine; nextLine++) { nextLine = startLine + 1 while nextLine < endLine: # check if it's outdented, i.e. it's inside list item and indented # less than said list item: # # ``` # 1. anything # > current blockquote # 2. checking this line # ``` isOutdented = state.sCount[nextLine] < state.blkIndent pos = state.bMarks[nextLine] + state.tShift[nextLine] max = state.eMarks[nextLine] if pos >= max: # Case 1: line is not inside the blockquote, and this line is empty. break evaluatesTrue = state.srcCharCode[pos] == 0x3E and not isOutdented # /* > */ pos += 1 if evaluatesTrue: # This line is inside the blockquote. # set offset past spaces and ">" initial = offset = state.sCount[nextLine] + 1 # skip one optional space after '>' if state.srcCharCode[pos] == 0x20: # /* space */ # ' > test ' # ^ -- position start of line here: pos += 1 initial += 1 offset += 1 adjustTab = False spaceAfterMarker = True elif state.srcCharCode[pos] == 0x09: # /* tab */ spaceAfterMarker = True if (state.bsCount[nextLine] + offset) % 4 == 3: # ' >\t test ' # ^ -- position start of line here (tab has width==1) pos += 1 initial += 1 offset += 1 adjustTab = False else: # ' >\t test ' # ^ -- position start of line here + shift bsCount slightly # to make extra space appear adjustTab = True else: spaceAfterMarker = False oldBMarks.append(state.bMarks[nextLine]) state.bMarks[nextLine] = pos while pos < max: ch = state.srcCharCode[pos] if isSpace(ch): if ch == 0x09: offset += ( 4 - ( offset + state.bsCount[nextLine] + (1 if adjustTab else 0) ) % 4 ) else: offset += 1 else: break pos += 1 lastLineEmpty = pos >= max oldBSCount.append(state.bsCount[nextLine]) state.bsCount[nextLine] = ( state.sCount[nextLine] + 1 + (1 if spaceAfterMarker else 0) ) oldSCount.append(state.sCount[nextLine]) state.sCount[nextLine] = offset - initial oldTShift.append(state.tShift[nextLine]) state.tShift[nextLine] = pos - state.bMarks[nextLine] nextLine += 1 continue # Case 2: line is not inside the blockquote, and the last line was empty. if lastLineEmpty: break # Case 3: another tag found. terminate = False for terminatorRule in terminatorRules: if terminatorRule(state, nextLine, endLine, True): terminate = True break if terminate: # Quirk to enforce "hard termination mode" for paragraphs; # normally if you call `tokenize(state, startLine, nextLine)`, # paragraphs will look below nextLine for paragraph continuation, # but if blockquote is terminated by another tag, they shouldn't state.lineMax = nextLine if state.blkIndent != 0: # state.blkIndent was non-zero, we now set it to zero, # so we need to re-calculate all offsets to appear as # if indent wasn't changed oldBMarks.append(state.bMarks[nextLine]) oldBSCount.append(state.bsCount[nextLine]) oldTShift.append(state.tShift[nextLine]) oldSCount.append(state.sCount[nextLine]) state.sCount[nextLine] -= state.blkIndent break oldBMarks.append(state.bMarks[nextLine]) oldBSCount.append(state.bsCount[nextLine]) oldTShift.append(state.tShift[nextLine]) oldSCount.append(state.sCount[nextLine]) # A negative indentation means that this is a paragraph continuation # state.sCount[nextLine] = -1 nextLine += 1 oldIndent = state.blkIndent state.blkIndent = 0 token = state.push("blockquote_open", "blockquote", 1) token.markup = ">" token.map = lines = [startLine, 0] state.md.block.tokenize(state, startLine, nextLine) token = state.push("blockquote_close", "blockquote", -1) token.markup = ">" state.lineMax = oldLineMax state.parentType = oldParentType lines[1] = state.line # Restore original tShift; this might not be necessary since the parser # has already been here, but just to make sure we can do that. for i, item in enumerate(oldTShift): state.bMarks[i + startLine] = oldBMarks[i] state.tShift[i + startLine] = item state.sCount[i + startLine] = oldSCount[i] state.bsCount[i + startLine] = oldBSCount[i] state.blkIndent = oldIndent state.lineMax += 1 return True