Implement SetMode and FetchMode window actions

winit/src/application.rs

@@ -640,6 +640,20 @@ pub fn run_command<A, E>(
                         y,
                     });
                 }
+                window::Action::SetMode(mode) => {
+                    window.set_visible(conversion::visible(mode));
+                    window.set_fullscreen(conversion::fullscreen(
+                        window.primary_monitor(),
+                        mode,
+                    ));
+                }
+                window::Action::FetchMode(tag) => {
+                    let mode = conversion::mode(window.fullscreen());
+
+                    proxy
+                        .send_event(tag(mode))
+                        .expect("Send message to event loop");
+                }
             },
             command::Action::System(action) => match action {
                 system::Action::QueryInformation(_tag) => {

winit/src/conversion.rs

@@ -182,6 +182,39 @@ pub fn position(
     }
 }
 
+/// Converts a [`window::Mode`] to a [`winit`] fullscreen mode.
+///
+/// [`winit`]: https://github.com/rust-windowing/winit
+pub fn fullscreen(
+    monitor: Option<winit::monitor::MonitorHandle>,
+    mode: window::Mode,
+) -> Option<winit::window::Fullscreen> {
+    match mode {
+        window::Mode::Windowed | window::Mode::Hidden => None,
+        window::Mode::Fullscreen => {
+            Some(winit::window::Fullscreen::Borderless(monitor))
+        }
+    }
+}
+
+/// Converts a [`window::Mode`] to a visibility flag.
+pub fn visible(mode: window::Mode) -> bool {
+    match mode {
+        window::Mode::Windowed | window::Mode::Fullscreen => true,
+        window::Mode::Hidden => false,
+    }
+}
+
+/// Converts a [`winit`] fullscreen mode to a [`window::Mode`].
+///
+/// [`winit`]: https://github.com/rust-windowing/winit
+pub fn mode(mode: Option<winit::window::Fullscreen>) -> window::Mode {
+    match mode {
+        None => window::Mode::Windowed,
+        Some(_) => window::Mode::Fullscreen,
+    }
+}
+
 /// Converts a `MouseCursor` from [`iced_native`] to a [`winit`] cursor icon.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit

winit/src/window.rs

@@ -2,7 +2,7 @@
 use crate::command::{self, Command};
 use iced_native::window;
 
-pub use window::Event;
+pub use window::{Event, Mode};
 
 /// Resizes the window to the given logical dimensions.
 pub fn resize<Message>(width: u32, height: u32) -> Command<Message> {
@@ -16,3 +16,17 @@ pub fn resize<Message>(width: u32, height: u32) -> Command<Message> {
 pub fn move_to<Message>(x: i32, y: i32) -> Command<Message> {
     Command::single(command::Action::Window(window::Action::Move { x, y }))
 }
+
+/// Sets the [`Mode`] of the window.
+pub fn set_mode<Message>(mode: Mode) -> Command<Message> {
+    Command::single(command::Action::Window(window::Action::SetMode(mode)))
+}
+
+/// Fetches the current [`Mode`] of the window.
+pub fn fetch_mode<Message>(
+    f: impl FnOnce(Mode) -> Message + 'static,
+) -> Command<Message> {
+    Command::single(command::Action::Window(window::Action::FetchMode(
+        Box::new(f),
+    )))
+}