blob: 88be02113207bcf6b08a389b83edab8bdcd946b6 [file] [log] [blame]
# Block quotes
import logging
from .state_block import StateBlock
from ..common.utils import isSpace
LOGGER = logging.getLogger(__name__)
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: # /* > */
pos += 1
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
# skip spaces after ">" and re-calculate offset
initial = offset = (
state.sCount[startLine]
+ pos
- (state.bMarks[startLine] + state.tShift[startLine])
)
# 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[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"
wasOutdented = False
# 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
# ```
if state.sCount[nextLine] < state.blkIndent:
wasOutdented = True
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 wasOutdented # /* > */
pos += 1
if evaluatesTrue:
# This line is inside the blockquote.
# skip spaces after ">" and re-calculate offset
initial = offset = (
state.sCount[nextLine]
+ pos
- (state.bMarks[nextLine] + state.tShift[nextLine])
)
# 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