# HTML block
import logging
import re
from typing import List, Tuple, Pattern
from .state_block import StateBlock
from ..common.html_blocks import block_names
from ..common.html_re import HTML_OPEN_CLOSE_TAG_STR
LOGGER = logging.getLogger(__name__)
# An array of opening and corresponding closing sequences for html tags,
# last argument defines whether it can terminate a paragraph or not
HTML_SEQUENCES: List[Tuple[Pattern, Pattern, bool]] = [
(
re.compile(r"^<(script|pre|style)(?=(\s|>|$))", re.IGNORECASE),
re.compile(r"<\/(script|pre|style)>", re.IGNORECASE),
True,
),
(re.compile(r"^<!--"), re.compile(r"-->"), True),
(re.compile(r"^<\?"), re.compile(r"\?>"), True),
(re.compile(r"^<![A-Z]"), re.compile(r">"), True),
(re.compile(r"^<!\[CDATA\["), re.compile(r"\]\]>"), True),
(
re.compile("^</?(" + "|".join(block_names) + ")(?=(\\s|/?>|$))", re.IGNORECASE),
re.compile(r"^$"),
True,
),
(re.compile(HTML_OPEN_CLOSE_TAG_STR + "\\s*$"), re.compile(r"^$"), False),
]
[docs]def html_block(state: StateBlock, startLine: int, endLine: int, silent: bool):
LOGGER.debug(
"entering html_block: %s, %s, %s, %s", state, startLine, endLine, silent
)
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 not state.md.options.get("html", None):
return False
if state.srcCharCode[pos] != 0x3C: # /* < */
return False
lineText = state.src[pos:maximum]
html_seq = None
for HTML_SEQUENCE in HTML_SEQUENCES:
if HTML_SEQUENCE[0].search(lineText):
html_seq = HTML_SEQUENCE
break
if not html_seq:
return False
if silent:
# true if this sequence can be a terminator, false otherwise
return html_seq[2]
nextLine = startLine + 1
# If we are here - we detected HTML block.
# Let's roll down till block end.
if not html_seq[1].search(lineText):
while nextLine < endLine:
if state.sCount[nextLine] < state.blkIndent:
break
pos = state.bMarks[nextLine] + state.tShift[nextLine]
maximum = state.eMarks[nextLine]
lineText = state.src[pos:maximum]
if html_seq[1].search(lineText):
if len(lineText) != 0:
nextLine += 1
break
nextLine += 1
state.line = nextLine
token = state.push("html_block", "", 0)
token.map = [startLine, nextLine]
token.content = state.getLines(startLine, nextLine, state.blkIndent, True)
return True