1# lheading (---, ==)
2import logging
3
4from .state_block import StateBlock
5
6LOGGER = logging.getLogger(__name__)
7
8
9def lheading(state: StateBlock, startLine: int, endLine: int, silent: bool) -> bool:
10 LOGGER.debug("entering lheading: %s, %s, %s, %s", state, startLine, endLine, silent)
11
12 level = None
13 nextLine = startLine + 1
14 ruler = state.md.block.ruler
15 terminatorRules = ruler.getRules("paragraph")
16
17 if state.is_code_block(startLine):
18 return False
19
20 oldParentType = state.parentType
21 state.parentType = "paragraph" # use paragraph to match terminatorRules
22
23 # jump line-by-line until empty one or EOF
24 while nextLine < endLine and not state.isEmpty(nextLine):
25 # this would be a code block normally, but after paragraph
26 # it's considered a lazy continuation regardless of what's there
27 if state.sCount[nextLine] - state.blkIndent > 3:
28 nextLine += 1
29 continue
30
31 # Check for underline in setext header
32 if state.sCount[nextLine] >= state.blkIndent:
33 pos = state.bMarks[nextLine] + state.tShift[nextLine]
34 maximum = state.eMarks[nextLine]
35
36 if pos < maximum:
37 marker = state.src[pos]
38
39 if marker in ("-", "="):
40 pos = state.skipCharsStr(pos, marker)
41 pos = state.skipSpaces(pos)
42
43 # /* = */
44 if pos >= maximum:
45 level = 1 if marker == "=" else 2
46 break
47
48 # quirk for blockquotes, this line should already be checked by that rule
49 if state.sCount[nextLine] < 0:
50 nextLine += 1
51 continue
52
53 # Some tags can terminate paragraph without empty line.
54 terminate = False
55 for terminatorRule in terminatorRules:
56 if terminatorRule(state, nextLine, endLine, True):
57 terminate = True
58 break
59 if terminate:
60 break
61
62 nextLine += 1
63
64 if not level:
65 # Didn't find valid underline
66 return False
67
68 content = state.getLines(startLine, nextLine, state.blkIndent, False).strip()
69
70 state.line = nextLine + 1
71
72 token = state.push("heading_open", "h" + str(level), 1)
73 token.markup = marker
74 token.map = [startLine, state.line]
75
76 token = state.push("inline", "", 0)
77 token.content = content
78 token.map = [startLine, state.line - 1]
79 token.children = []
80
81 token = state.push("heading_close", "h" + str(level), -1)
82 token.markup = marker
83
84 state.parentType = oldParentType
85
86 return True