🐛 FIX: Linkify link nesting levels (#142)

Due to a porting error, linkify link tokens have incorrect nesting levels.

Author: hukkinj1

markdown_it/rules_core/linkify.py

@@ -113,7 +113,8 @@ def linkify(state: StateCore) -> None:
 
                     token = Token("link_open", "a", 1)
                     token.attrs = [["href", fullUrl]]
-                    token.level = level + 1
+                    token.level = level
+                    level += 1
                     token.markup = "linkify"
                     token.info = "auto"
                     nodes.append(token)
@@ -124,7 +125,8 @@ def linkify(state: StateCore) -> None:
                     nodes.append(token)
 
                     token = Token("link_close", "a", -1)
-                    token.level = level - 1
+                    level -= 1
+                    token.level = level
                     token.markup = "linkify"
                     token.info = "auto"
                     nodes.append(token)

tests/test_linkify.py

@@ -0,0 +1,19 @@
+from markdown_it import MarkdownIt
+
+
+def test_token_levels():
+    mdit = MarkdownIt(options_update={"linkify": True}).enable("linkify")
+    tokens = mdit.parse("www.python.org")
+    inline = tokens[1]
+    assert inline.type == "inline"
+    link_open = inline.children[0]
+    assert link_open.type == "link_open"
+    link_text = inline.children[1]
+    assert link_text.type == "text"
+    link_close = inline.children[2]
+    assert link_close.type == "link_close"
+
+    # Assert that linkify tokens have correct nesting levels
+    assert link_open.level == 0
+    assert link_text.level == 1
+    assert link_close.level == 0