Set activation policy at runtime (#353)

* MacOS extension: Set activation policy at runtime * Add change note * Apply suggestions from code review Co-authored-by: Amr Bashir <[email protected]> * [cherry-pick] Merge in kasperkh's docstrings * Update .changes/add-runtime-activation-policy-mac.md Co-authored-by: Amr Bashir <[email protected]> * rustfmt Co-authored-by: Amr Bashir <[email protected]> Co-authored-by: Kasper <[email protected]>
tauri-apps · Mar 30, 2022 · ef06c50 · ef06c50
1 parent 34be12d
commit ef06c50
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diff --git a/.changes/add-runtime-activation-policy-mac.md b/.changes/add-runtime-activation-policy-mac.md
@@ -0,0 +1,5 @@
+---
+"tao": minor
+---
+
+Add `EventLoopWindowTargetExtMacOS::set_activation_policy_at_runtime`.
diff --git a/src/platform/macos.rs b/src/platform/macos.rs
@@ -17,7 +17,13 @@ use crate::{
 #[cfg(feature = "tray")]
 use crate::system_tray::{SystemTray, SystemTrayBuilder};
 
-use cocoa::{appkit, base::id};
+use cocoa::{
+  appkit::{
+    self, NSApplicationActivationPolicy, NSApplicationActivationPolicyAccessory,
+    NSApplicationActivationPolicyProhibited, NSApplicationActivationPolicyRegular,
+  },
+  base::id,
+};
 
 /// Additional methods on `Window` that are specific to MacOS.
 pub trait WindowExtMacOS {
@@ -100,6 +106,16 @@ impl Default for ActivationPolicy {
   }
 }
 
+impl From<ActivationPolicy> for NSApplicationActivationPolicy {
+  fn from(act_pol: ActivationPolicy) -> Self {
+    match act_pol {
+      ActivationPolicy::Regular => NSApplicationActivationPolicyRegular,
+      ActivationPolicy::Accessory => NSApplicationActivationPolicyAccessory,
+      ActivationPolicy::Prohibited => NSApplicationActivationPolicyProhibited,
+    }
+  }
+}
+
 pub trait CustomMenuItemExtMacOS {
   fn set_native_image(&mut self, native_image: NativeImage);
 }
@@ -393,8 +409,11 @@ pub trait EventLoopExtMacOS {
   /// Sets the activation policy for the application. It is set to
   /// `NSApplicationActivationPolicyRegular` by default.
   ///
-  /// This function only takes effect if it's called before calling [`run`](crate::event_loop::EventLoop::run) or
-  /// [`run_return`](crate::platform::run_return::EventLoopExtRunReturn::run_return)
+  /// This function only takes effect if it's called before calling
+  /// [`run`](crate::event_loop::EventLoop::run) or
+  /// [`run_return`](crate::platform::run_return::EventLoopExtRunReturn::run_return).
+  /// To set the activation policy after that, use
+  /// [`EventLoopWindowTargetExtMacOS::set_activation_policy_at_runtime`](crate::platform::macos::EventLoopWindowTargetExtMacOS::set_activation_policy_at_runtime).
   fn set_activation_policy(&mut self, activation_policy: ActivationPolicy);
 
   /// Used to prevent a default menubar menu from getting created
@@ -449,6 +468,12 @@ pub trait EventLoopWindowTargetExtMacOS {
   fn show_application(&self);
   /// Hide the other applications. In most applications this is typically triggered with Command+Option-H.
   fn hide_other_applications(&self);
+  /// Sets the activation policy for the application. It is set to
+  /// `NSApplicationActivationPolicyRegular` by default.
+  ///
+  /// To set the activation policy before the app starts running, see
+  /// [`EventLoopExtMacOS::set_activation_policy`](crate::platform::macos::EventLoopExtMacOS::set_activation_policy).
+  fn set_activation_policy_at_runtime(&self, activation_policy: ActivationPolicy);
 }
 
 impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
@@ -469,6 +494,13 @@ impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
     let app: cocoa::base::id = unsafe { msg_send![cls, sharedApplication] };
     unsafe { msg_send![app, hideOtherApplications: 0] }
   }
+
+  fn set_activation_policy_at_runtime(&self, activation_policy: ActivationPolicy) {
+    let cls = objc::runtime::Class::get("NSApplication").unwrap();
+    let app: cocoa::base::id = unsafe { msg_send![cls, sharedApplication] };
+    let ns_activation_policy: NSApplicationActivationPolicy = activation_policy.into();
+    unsafe { msg_send![app, setActivationPolicy: ns_activation_policy] }
+  }
 }
 
 #[cfg(feature = "tray")]