fix(core): emit tauri://window-created event for windows created on Rust (#3299)

.changes/emit-window-created-backend.md

@@ -0,0 +1,5 @@
+---
+"tauri": patch
+---
+
+Emit `tauri://window-created` event for windows created on the backend.

core/tauri/src/endpoints/window.rs

@@ -146,12 +146,6 @@ pub enum Cmd {
   },
 }
 
-#[cfg(window_create)]
-#[derive(Clone, serde::Serialize)]
-struct WindowCreatedEvent {
-  label: String,
-}
-
 impl Cmd {
   #[module_command_handler(window_create, "window > create")]
   async fn create_webview<R: Runtime>(
@@ -162,14 +156,12 @@ impl Cmd {
     let label = options.label.clone();
     let url = options.url.clone();
 
-    window
-      .create_window(label.clone(), url, |_, webview_attributes| {
-        (
-          <<R::Dispatcher as Dispatch>::WindowBuilder>::with_config(*options),
-          webview_attributes,
-        )
-      })?
-      .emit_others("tauri://window-created", Some(WindowCreatedEvent { label }))?;
+    window.create_window(label, url, |_, webview_attributes| {
+      (
+        <<R::Dispatcher as Dispatch>::WindowBuilder>::with_config(*options),
+        webview_attributes,
+      )
+    })?;
 
     Ok(())
   }

core/tauri/src/lib.rs

@@ -498,6 +498,11 @@ pub(crate) mod sealed {
     Dispatch(R::Dispatcher),
   }
 
+  #[derive(Clone, serde::Serialize)]
+  struct WindowCreatedEvent {
+    label: String,
+  }
+
   /// Managed handle to the application runtime.
   pub trait ManagerBase<R: Runtime> {
     /// The manager behind the [`Managed`] item.
@@ -516,16 +521,22 @@ pub(crate) mod sealed {
       let pending = self
         .manager()
         .prepare_window(self.app_handle(), pending, &labels)?;
-      match self.runtime() {
-        RuntimeOrDispatch::Runtime(runtime) => runtime.create_window(pending).map_err(Into::into),
-        RuntimeOrDispatch::RuntimeHandle(handle) => {
-          handle.create_window(pending).map_err(Into::into)
-        }
-        RuntimeOrDispatch::Dispatch(mut dispatcher) => {
-          dispatcher.create_window(pending).map_err(Into::into)
-        }
+      let window = match self.runtime() {
+        RuntimeOrDispatch::Runtime(runtime) => runtime.create_window(pending),
+        RuntimeOrDispatch::RuntimeHandle(handle) => handle.create_window(pending),
+        RuntimeOrDispatch::Dispatch(mut dispatcher) => dispatcher.create_window(pending),
       }
-      .map(|window| self.manager().attach_window(self.app_handle(), window))
+      .map(|window| self.manager().attach_window(self.app_handle(), window))?;
+
+      self.manager().emit_filter(
+        "tauri://window-created",
+        Some(WindowCreatedEvent {
+          label: window.label().into(),
+        }),
+        |w| w != &window,
+      )?;
+
+      Ok(window)
     }
   }
 }