Rename fetch_native_handle to run_with_handle in window

runtime/src/window.rs

@@ -15,6 +15,8 @@ use crate::core::{Point, Size};
 use crate::futures::event;
 use crate::futures::Subscription;
 
+pub use raw_window_handle;
+
 use raw_window_handle::WindowHandle;
 
 /// Subscribes to the frames of the window of the running application.
@@ -172,14 +174,14 @@ pub fn change_icon<Message>(id: Id, icon: Icon) -> Command<Message> {
     Command::single(command::Action::Window(Action::ChangeIcon(id, icon)))
 }
 
-/// Requests access to the native window handle for the window with the given id.
+/// Runs the given callback with the native window handle for the window with the given id.
 ///
 /// Note that if the window closes before this call is processed the callback will not be run.
-pub fn fetch_native_handle<Message>(
+pub fn run_with_handle<Message>(
     id: Id,
     f: impl FnOnce(&WindowHandle<'_>) -> Message + 'static,
 ) -> Command<Message> {
-    Command::single(command::Action::Window(Action::FetchNativeHandle(
+    Command::single(command::Action::Window(Action::RunWithHandle(
         id,
         Box::new(f),
     )))

runtime/src/window/action.rs

@@ -99,7 +99,7 @@ pub enum Action<T> {
     ///   said, it's usually in the same ballpark as on Windows.
     ChangeIcon(Id, Icon),
     /// Requests access to the windows native handle.
-    FetchNativeHandle(Id, Box<dyn FnOnce(&WindowHandle<'_>) -> T + 'static>),
+    RunWithHandle(Id, Box<dyn FnOnce(&WindowHandle<'_>) -> T + 'static>),
     /// Screenshot the viewport of the window.
     Screenshot(Id, Box<dyn FnOnce(Screenshot) -> T + 'static>),
 }
@@ -145,8 +145,8 @@ impl<T> Action<T> {
                 Action::FetchId(id, Box::new(move |s| f(o(s))))
             }
             Self::ChangeIcon(id, icon) => Action::ChangeIcon(id, icon),
-            Self::FetchNativeHandle(id, o) => {
-                Action::FetchNativeHandle(id, Box::new(move |s| f(o(s))))
+            Self::RunWithHandle(id, o) => {
+                Action::RunWithHandle(id, Box::new(move |s| f(o(s))))
             }
             Self::Screenshot(id, tag) => Action::Screenshot(
                 id,
@@ -204,8 +204,8 @@ impl<T> fmt::Debug for Action<T> {
             Self::ChangeIcon(id, _icon) => {
                 write!(f, "Action::ChangeIcon({id:?})")
             }
-            Self::FetchNativeHandle(id, _) => {
-                write!(f, "Action::RequestNativeHandle({id:?})")
+            Self::RunWithHandle(id, _) => {
+                write!(f, "Action::RunWithHandle({id:?})")
             }
             Self::Screenshot(id, _) => write!(f, "Action::Screenshot({id:?})"),
         }

winit/src/application.rs

@@ -23,8 +23,6 @@ use crate::{Clipboard, Error, Proxy, Settings};
 
 use futures::channel::mpsc;
 
-use winit::raw_window_handle::HasWindowHandle;
-
 use std::mem::ManuallyDrop;
 use std::sync::Arc;
 
@@ -785,13 +783,16 @@ pub fn run_command<A, C, E>(
                         .send_event(tag(window.id().into()))
                         .expect("Send message to event loop");
                 }
-                window::Action::FetchNativeHandle(_id, tag) => {
-                    proxy
-                        .send_event(tag(&window
-                            .window_handle()
-                            .expect("Missing window handle")))
-                        .expect("Send message to event loop");
+                window::Action::RunWithHandle(_id, tag) => {
+                    use window::raw_window_handle::HasWindowHandle;
+
+                    if let Ok(handle) = window.window_handle() {
+                        proxy
+                            .send_event(tag(&handle))
+                            .expect("Send message to event loop");
+                    }
                 }
+
                 window::Action::Screenshot(_id, tag) => {
                     let bytes = compositor.screenshot(
                         renderer,

winit/src/multi_window.rs

@@ -22,8 +22,6 @@ use crate::runtime::Debug;
 use crate::style::application::StyleSheet;
 use crate::{Clipboard, Error, Proxy, Settings};
 
-use winit::raw_window_handle::HasWindowHandle;
-
 use std::collections::HashMap;
 use std::mem::ManuallyDrop;
 use std::sync::Arc;
@@ -1000,7 +998,7 @@ fn run_command<A, C, E>(
 
                         proxy
                             .send_event(tag(mode))
-                            .expect("Event loop doesn't exist.");
+                            .expect("Send message to event loop");
                     }
                 }
                 window::Action::ToggleMaximize(id) => {
@@ -1036,17 +1034,19 @@ fn run_command<A, C, E>(
                     if let Some(window) = window_manager.get_mut(id) {
                         proxy
                             .send_event(tag(window.raw.id().into()))
-                            .expect("Event loop doesn't exist.");
+                            .expect("Send message to event loop");
                     }
                 }
-                window::Action::FetchNativeHandle(id, tag) => {
-                    if let Some(window) = window_manager.get_mut(id) {
+                window::Action::RunWithHandle(id, tag) => {
+                    use window::raw_window_handle::HasWindowHandle;
+
+                    if let Some(handle) = window_manager
+                        .get_mut(id)
+                        .and_then(|window| window.raw.window_handle().ok())
+                    {
                         proxy
-                            .send_event(tag(&window
-                                .raw
-                                .window_handle()
-                                .expect("Missing window handle.")))
-                            .expect("Event loop doesn't exist.");
+                            .send_event(tag(&handle))
+                            .expect("Send message to event loop");
                     }
                 }
                 window::Action::Screenshot(id, tag) => {