feat: enlarge floating hover and highlight Markdown content

src/syntax.rs

@@ -64,6 +64,18 @@ impl SyntaxCache {
         Self::default()
     }
 
+    pub(crate) fn update_text(&mut self, text: &str, path: &Path) {
+        if self.source == text && self.path.as_deref() == Some(path) {
+            return;
+        }
+        let lines: Vec<String> = text.split('\n').map(str::to_owned).collect();
+        self.update(
+            &lines,
+            Some(path),
+            self.revision.unwrap_or(0).wrapping_add(1),
+        );
+    }
+
     /// `revision` must change whenever line content changes; path changes are detected separately.
     pub fn update(&mut self, lines: &[String], path: Option<&Path>, revision: u64) {
         let path_changed = self.path.as_deref() != path;