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client/input_manager.ts

@@ -96,6 +96,8 @@ export class InputManager {
 	static mouse_ungrab_timer = 0;
 	static mouse_ungrab_timeout = -1;
 	static pointer_lock_waiting = false;
+	// the browser let go of the mouse while the game wanted it, like escape or switching windows
+	static #lost_pointer_lock = false;
 
 	static initialize(canvas: HTMLCanvasElement) {
 		self.addEventListener("keydown", (e) => {
@@ -164,6 +166,7 @@ export class InputManager {
 				if (!grab) {
 					if (this.pointer_lock_flag) {
 						this.mouse_ungrab_timer = performance.now();
+						this.#lost_pointer_lock = true;
 					}
 				}
 				this.pointer_lock_flag = grab;
@@ -266,6 +269,13 @@ export class InputManager {
 		}
 	}
 
+	// whether the mouse was taken away since the last call, browsers eat the escape that does it
+	static take_lost_pointer_lock() {
+		const lost = this.#lost_pointer_lock;
+		this.#lost_pointer_lock = false;
+		return lost;
+	}
+
 	static is_mouse_grabbed() {
 		return document.hasFocus() && document.pointerLockElement === canvas;
 	}