preliminary tracing for tachys

leptos/Cargo.toml

@@ -83,6 +83,7 @@ miniserde = ["leptos_reactive/miniserde"]
 rkyv = ["leptos_reactive/rkyv", "server_fn/rkyv"]
 tracing = [
   "reactive_graph/tracing",
+  "tachys/tracing"
 ] #, "leptos_macro/tracing", "leptos_dom/tracing"]
 nonce = ["base64", "leptos_dom/nonce", "rand"]
 spin = ["leptos_reactive/spin", "leptos-spin-macro"]

tachys/Cargo.toml

@@ -155,6 +155,7 @@ send_wrapper = "0.6"
 linear-map = "1.2.0"
 sledgehammer_bindgen = { version = "0.4", features = ["web"], optional = true }
 sledgehammer_utils = { version = "0.2", optional = true }
+tracing = { version = "0.1", optional = true }
 
 [dev-dependencies]
 tokio-test = "0.4"
@@ -172,3 +173,4 @@ nightly = ["reactive_graph/nightly"]
 testing = ["dep:slotmap"]
 reactive_graph = ["dep:reactive_graph"]
 sledgehammer = ["dep:sledgehammer_bindgen", "dep:sledgehammer_utils"]
+tracing = ["dep:tracing"]

tachys/src/html/event.rs

@@ -166,7 +166,17 @@ where
         }
 
         let mut cb = self.cb.take();
+
+        #[cfg(feature = "tracing")]
+        let span = tracing::Span::current();
+
         let cb = Box::new(move |ev: R::Event| {
+            #[cfg(all(debug_assertions, feature = "reactive_graph"))]
+            let _rx_guard =
+                reactive_graph::diagnostics::SpecialNonReactiveZone::enter();
+            #[cfg(feature = "tracing")]
+            let _tracing_guard = span.enter();
+
             let ev = E::EventType::from(ev);
             cb.invoke(ev);
         }) as Box<dyn FnMut(R::Event)>;