1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
import re
from markdown_it import MarkdownIt
from markdown_it.common.utils import escapeHtml
from markdown_it.rules_inline import StateInline
VALID_NAME_PATTERN = re.compile(r"^\{([a-zA-Z0-9\_\-\+\:]+)\}")
def myst_role_plugin(md: MarkdownIt):
"""Parse ``{role-name}`content```"""
md.inline.ruler.before("backticks", "myst_role", myst_role)
md.add_render_rule("myst_role", render_myst_role)
def myst_role(state: StateInline, silent: bool):
# check name
match = VALID_NAME_PATTERN.match(state.src[state.pos :])
if not match:
return False
name = match.group(1)
# check for starting backslash escape
try:
if state.srcCharCode[state.pos - 1] == 0x5C: # /* \ */
# escaped (this could be improved in the case of edge case '\\{')
return False
except IndexError:
pass
# scan opening tick length
start = pos = state.pos + match.end()
try:
while state.src[pos] == "`":
pos += 1
except IndexError:
return False
tick_length = pos - start
if not tick_length:
return False
# search for closing ticks
match = re.search("`" * tick_length, state.src[pos + 1 :])
if not match:
return False
content = state.src[pos : pos + match.start() + 1].replace("\n", " ")
if not silent:
token = state.push("myst_role", "", 0)
token.meta = {"name": name}
token.content = content
state.pos = pos + match.end() + 1
return True
def render_myst_role(self, tokens, idx, options, env):
token = tokens[idx]
name = token.meta.get("name", "unknown")
return (
'<code class="myst role">' f"{{{name}}}[{escapeHtml(token.content)}]" "</code>"
)
|
