fix(markdown): post message when link clicked in table

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Fixed grid + keyline when the grid has auto dimensions https://github.com/Textualize/textual/pull/4680
 - Fixed mouse code leakage https://github.com/Textualize/textual/pull/4681
+- Fixed link inside markdown table not posting a `Markdown.LinkClicked` message https://github.com/Textualize/textual/issues/4683
 
 
 ## [0.70.0] - 2024-06-19

src/textual/widgets/_markdown.py

@@ -487,6 +487,11 @@ def render(self) -> Table:
                 table.add_row(*row)
         return table
 
+    async def action_link(self, href: str) -> None:
+        """Pass a link action on to the MarkdownTable parent."""
+        if isinstance(self.parent, MarkdownTable):
+            await self.parent.action_link(href)
+
 
 class MarkdownTable(MarkdownBlock):
     """A Table markdown Block."""

tests/test_markdown.py

@@ -164,3 +164,36 @@ def log_table_of_content_update(
         await pilot.app.query_one(Markdown).update("")
         await pilot.pause()
         assert messages == ["TableOfContentsUpdated", "TableOfContentsUpdated"]
+
+
+async def test_link_in_markdown_table_posts_message_when_clicked():
+    """A link inside a markdown table should post a `Markdown.LinkClicked`
+    message when clicked.
+
+    Regression test for https://github.com/Textualize/textual/issues/4683
+    """
+
+    markdown_table = """\
+| Textual Links                                    |
+| ------------------------------------------------ |
+| [GitHub](https://github.com/textualize/textual/) |
+| [Documentation](https://textual.textualize.io/)  |\
+"""
+
+    class MarkdownTableApp(App):
+        messages = []
+
+        def compose(self) -> ComposeResult:
+            yield Markdown(markdown_table)
+
+        @on(Markdown.LinkClicked)
+        def log_markdown_link_clicked(
+            self,
+            event: Markdown.LinkClicked,
+        ) -> None:
+            self.messages.append(event.__class__.__name__)
+
+    app = MarkdownTableApp()
+    async with app.run_test() as pilot:
+        await pilot.click(Markdown, offset=(3, 3))
+        assert app.messages == ["LinkClicked"]