add supports_multiple_windows API

Cargo.lock

@@ -1319,7 +1319,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
 dependencies = [
  "lazy_static",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -2348,7 +2348,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "33d852cb9b869c2a9b3df2f71a3074817f01e1844f839a144f5fcef059a4eb5d"
 dependencies = [
  "libc",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -5848,7 +5848,7 @@ dependencies = [
  "aes-gcm",
  "aes-kw",
  "argon2",
- "base64 0.22.1",
+ "base64 0.21.7",
  "bitfield",
  "block-padding",
  "blowfish",
@@ -6428,7 +6428,7 @@ dependencies = [
  "once_cell",
  "socket2",
  "tracing",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -7147,7 +7147,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.4.15",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -7160,7 +7160,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.9.4",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -8444,7 +8444,7 @@ dependencies = [
 [[package]]
 name = "tao"
 version = "0.34.5"
-source = "git+https://github.com/tauri-apps/tao?branch=feat/mobile-multi-window#e07caa1ea2edf0a8a675fadc53f301a66aa60900"
+source = "git+https://github.com/tauri-apps/tao?branch=feat/mobile-multi-window#fb52c343d759521dbf9277bf8257b1323b2077a0"
 dependencies = [
  "bitflags 2.7.0",
  "block2 0.6.0",
@@ -8494,7 +8494,7 @@ dependencies = [
 [[package]]
 name = "tao-macros"
 version = "0.1.3"
-source = "git+https://github.com/tauri-apps/tao?branch=feat/mobile-multi-window#e07caa1ea2edf0a8a675fadc53f301a66aa60900"
+source = "git+https://github.com/tauri-apps/tao?branch=feat/mobile-multi-window#fb52c343d759521dbf9277bf8257b1323b2077a0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -9040,7 +9040,7 @@ dependencies = [
  "getrandom 0.2.15",
  "once_cell",
  "rustix 0.38.43",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -10356,7 +10356,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -10989,7 +10989,7 @@ checksum = "1e9df38ee2d2c3c5948ea468a8406ff0db0b29ae1ffde1bcf20ef305bcc95c51"
 [[package]]
 name = "wry"
 version = "0.53.5"
-source = "git+https://github.com/tauri-apps/wry?branch=feat/mobile-multi-webview#5861318d87e8ac3b71ec7aae64df931923bbbc39"
+source = "git+https://github.com/tauri-apps/wry?branch=feat/mobile-multi-webview#8d8836116aaaef271775e2958f3e38c4b5d18b04"
 dependencies = [
  "base64 0.22.1",
  "block2 0.6.0",

crates/tauri/build.rs

@@ -168,6 +168,7 @@ const PLUGINS: &[(&str, &[(&str, bool)])] = &[
       ("bundle_type", true),
       ("register_listener", true),
       ("remove_listener", true),
+      ("supports_multiple_windows", true),
     ],
   ),
   (

crates/tauri/permissions/app/autogenerated/reference.md

@@ -11,6 +11,7 @@ Default permissions for the plugin.
 - `allow-bundle-type`
 - `allow-register-listener`
 - `allow-remove-listener`
+- `allow-supports-multiple-windows`
 
 ## Permission Table
 
@@ -336,6 +337,32 @@ Denies the set_dock_visibility command without any pre-configured scope.
 <tr>
 <td>
 
+`core:app:allow-supports-multiple-windows`
+
+</td>
+<td>
+
+Enables the supports_multiple_windows command without any pre-configured scope.
+
+</td>
+</tr>
+
+<tr>
+<td>
+
+`core:app:deny-supports-multiple-windows`
+
+</td>
+<td>
+
+Denies the supports_multiple_windows command without any pre-configured scope.
+
+</td>
+</tr>
+
+<tr>
+<td>
+
 `core:app:allow-tauri-version`
 
 </td>

crates/tauri/src/app.rs

@@ -648,6 +648,18 @@ impl<R: Runtime> AppHandle<R> {
   pub fn set_device_event_filter(&self, filter: DeviceEventFilter) {
     self.runtime_handle.set_device_event_filter(filter);
   }
+
+  /// Whether the application supports multiple windows.
+  #[cfg(target_os = "ios")]
+  pub fn supports_multiple_windows(&self) -> bool {
+    let (tx, rx) = std::sync::mpsc::channel();
+    self.run_on_main_thread(move || unsafe {
+      let mtm = objc2::MainThreadMarker::new().unwrap();
+      let ui_application = objc2_ui_kit::UIApplication::sharedApplication(mtm);
+      tx.send(ui_application.supportsMultipleScenes()).unwrap();
+    });
+    rx.recv().unwrap()
+  }
 }
 
 impl<R: Runtime> Manager<R> for AppHandle<R> {
@@ -1081,6 +1093,40 @@ macro_rules! shared_app_impl {
       pub fn invoke_key(&self) -> &str {
         self.manager.invoke_key()
       }
+
+      /// Whether the application supports multiple windows.
+      #[cfg(desktop)]
+      pub fn supports_multiple_windows(&self) -> bool {
+        true
+      }
+
+      /// Whether the application supports multiple windows.
+      #[cfg(target_os = "android")]
+      pub fn supports_multiple_windows(&self) -> bool {
+        let runtime_handle = match self.runtime() {
+          RuntimeOrDispatch::Runtime(runtime) => runtime.handle(),
+          RuntimeOrDispatch::RuntimeHandle(handle) => handle,
+          _ => unreachable!(),
+        };
+
+        let (tx, rx) = std::sync::mpsc::channel();
+
+        runtime_handle.run_on_android_context(move |env, _activity, _webview| {
+          let supports = (|| {
+            let version_class = env.find_class("android/os/Build$VERSION")?;
+            let sdk = env
+              .get_static_field(version_class, "SDK_INT", "I")?
+              .i()
+              .unwrap_or_default();
+            crate::Result::Ok(sdk >= 32)
+          })()
+          .unwrap_or(false);
+
+          let _ = tx.send(supports);
+        });
+
+        rx.recv().unwrap_or(false)
+      }
     }
 
     impl<R: Runtime> Listener<R> for $app {
@@ -1180,6 +1226,16 @@ impl<R: Runtime> App<R> {
     &self.handle
   }
 
+  /// Whether the application supports multiple windows.
+  #[cfg(target_os = "ios")]
+  pub fn supports_multiple_windows(&self) -> bool {
+    unsafe {
+      let mtm = objc2::MainThreadMarker::new().unwrap();
+      let ui_application = objc2_ui_kit::UIApplication::sharedApplication(mtm);
+      ui_application.supportsMultipleScenes()
+    }
+  }
+
   /// Sets the activation policy for the application. It is set to `NSApplicationActivationPolicyRegular` by default.
   ///
   /// # Examples

crates/tauri/src/app/plugin.rs

@@ -115,6 +115,11 @@ pub fn bundle_type() -> Option<BundleType> {
   tauri_utils::platform::bundle_type()
 }
 
+#[command(root = "crate")]
+pub fn supports_multiple_windows<R: Runtime>(app: AppHandle<R>) -> bool {
+  app.supports_multiple_windows()
+}
+
 pub fn init<R: Runtime>() -> TauriPlugin<R> {
   Builder::new("app")
     .invoke_handler(crate::generate_handler![
@@ -131,6 +136,7 @@ pub fn init<R: Runtime>() -> TauriPlugin<R> {
       set_app_theme,
       set_dock_visibility,
       bundle_type,
+      supports_multiple_windows,
     ])
     .setup(|_app, _api| {
       #[cfg(target_os = "android")]

packages/api/src/app.ts

@@ -274,6 +274,10 @@ async function onBackButtonPress(
   )
 }
 
+async function supportsMultipleWindows(): Promise<boolean> {
+  return invoke('plugin:app|supports_multiple_windows')
+}
+
 export {
   getName,
   getVersion,
@@ -288,5 +292,6 @@ export {
   setDockVisibility,
   getBundleType,
   type OnBackButtonPressPayload,
-  onBackButtonPress
+  onBackButtonPress,
+  supportsMultipleWindows
 }