👌 Expand support for Python-Markdown in the admon plugin (#94)

- Strip redundant quotes to improve support for [Python Markdown](https://python-markdown.github.io/extensions/admonition/)
- Follow Python-Markdown's syntax to parse the title in double quotes and use all other tokens as classes

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Chris Sewell <chrisj_sewell@hotmail.com>

.coveragerc

@@ -0,0 +1,4 @@
+[report]
+exclude_lines =
+    pragma: no cover
+    if TYPE_CHECKING:

mdit_py_plugins/admon/index.py

@@ -1,7 +1,10 @@
 # Process admonitions and pass to cb.
+
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Callable, Sequence
+from contextlib import suppress
+import re
+from typing import TYPE_CHECKING, Callable, List, Sequence, Tuple
 
 from markdown_it import MarkdownIt
 from markdown_it.rules_block import StateBlock
@@ -14,20 +17,34 @@
     from markdown_it.utils import EnvType, OptionsDict
 
 
-def _get_tag(params: str) -> tuple[str, str]:
+def _get_multiple_tags(params: str) -> Tuple[List[str], str]:
+    """Check for multiple tags when the title is double quoted."""
+    re_tags = re.compile(r'^\s*(?P<tokens>[^"]+)\s+"(?P<title>.*)"\S*$')
+    match = re_tags.match(params)
+    if match:
+        tags = match["tokens"].strip().split(" ")
+        return [tag.lower() for tag in tags], match["title"]
+    raise ValueError("No match found for parameters")
+
+
+def _get_tag(_params: str) -> Tuple[List[str], str]:
     """Separate the tag name from the admonition title."""
-    if not params.strip():
-        return "", ""
+    params = _params.strip()
+    if not params:
+        return [""], ""
+
+    with suppress(ValueError):
+        return _get_multiple_tags(params)
 
-    tag, *_title = params.strip().split(" ")
+    tag, *_title = params.split(" ")
     joined = " ".join(_title)
 
     title = ""
     if not joined:
         title = tag.title()
-    elif joined != '""':
+    elif joined != '""':  # Specifically check for no title
         title = joined
-    return tag.lower(), title
+    return [tag.lower()], title
 
 
 def _validate(params: str) -> bool:
@@ -125,12 +142,13 @@ def admonition(state: StateBlock, startLine: int, endLine: int, silent: bool) ->
     # this will prevent lazy continuations from ever going past our end marker
     state.lineMax = next_line
 
-    tag, title = _get_tag(params)
+    tags, title = _get_tag(params)
+    tag = tags[0]
 
     token = state.push("admonition_open", "div", 1)
     token.markup = markup
     token.block = True
-    token.attrs = {"class": " ".join(["admonition", tag, *_extra_classes(markup)])}
+    token.attrs = {"class": " ".join(["admonition", *tags, *_extra_classes(markup)])}
     token.meta = {"tag": tag}
     token.content = title
     token.info = params

tests/fixtures/admon.md

@@ -53,6 +53,32 @@ Shows no title
 .
 
 
+Removes extra quotes from the title
+.
+!!! danger "Don't try this at home"
+    ...
+
+.
+<div class="admonition danger">
+<p class="admonition-title">Don't try this at home</p>
+<p>...</p>
+</div>
+.
+
+
+Parse additional classes to support Python markdown (https://github.com/executablebooks/mdit-py-plugins/issues/93#issuecomment-1601822723)
+.
+!!! a b c d inline-classes   "Note: note about "foo"" 
+    ...
+
+.
+<div class="admonition a b c d inline-classes">
+<p class="admonition-title">Note: note about &quot;foo&quot;</p>
+<p>...</p>
+</div>
+.
+
+
 Closes block after 2 empty lines
 .
 !!! note