Desktop: Add fullscreen window mode (#3625)

desktop/src/window.rs

@@ -1,13 +1,13 @@
+use crate::consts::APP_NAME;
+use crate::event::AppEventScheduler;
+use crate::wrapper::messages::MenuItem;
 use std::collections::HashMap;
 use std::sync::Arc;
 use winit::cursor::{CursorIcon, CustomCursor, CustomCursorSource};
 use winit::event_loop::ActiveEventLoop;
+use winit::monitor::Fullscreen;
 use winit::window::{Window as WinitWindow, WindowAttributes};
 
-use crate::consts::APP_NAME;
-use crate::event::AppEventScheduler;
-use crate::wrapper::messages::MenuItem;
-
 pub(crate) trait NativeWindow {
 	fn init() {}
 	fn configure(attributes: WindowAttributes, event_loop: &dyn ActiveEventLoop) -> WindowAttributes;
@@ -111,6 +111,9 @@ impl Window {
 	}
 
 	pub(crate) fn toggle_maximize(&self) {
+		if self.is_fullscreen() {
+			return;
+		}
 		self.winit_window.set_maximized(!self.winit_window.is_maximized());
 	}
 
@@ -118,11 +121,22 @@ impl Window {
 		self.winit_window.is_maximized()
 	}
 
+	pub(crate) fn toggle_fullscreen(&mut self) {
+		if self.is_fullscreen() {
+			self.winit_window.set_fullscreen(None);
+		} else {
+			self.winit_window.set_fullscreen(Some(Fullscreen::Borderless(None)));
+		}
+	}
+
 	pub(crate) fn is_fullscreen(&self) -> bool {
 		self.winit_window.fullscreen().is_some()
 	}
 
 	pub(crate) fn start_drag(&self) {
+		if self.is_fullscreen() {
+			return;
+		}
 		let _ = self.winit_window.drag_window();
 	}