Extract hooks from utils file

src/modules/reader/hooks/useReaderHideCursorOnInactivity.ts

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import { MutableRefObject, useEffect, useRef } from 'react';
+
+export const useReaderHideCursorOnInactivity = (scrollElementRef: MutableRefObject<HTMLDivElement | null>) => {
+    const mouseInactiveTimeout = useRef<NodeJS.Timeout>();
+
+    useEffect(() => {
+        const setCursorVisibility = (visible: boolean) => {
+            const scrollElement = scrollElementRef.current;
+            if (!scrollElement) {
+                return;
+            }
+
+            scrollElement.style.cursor = visible ? 'default' : 'none';
+        };
+
+        const handleMouseMove = () => {
+            setCursorVisibility(true);
+            clearTimeout(mouseInactiveTimeout.current);
+            mouseInactiveTimeout.current = setTimeout(() => {
+                setCursorVisibility(false);
+            }, 5000);
+        };
+
+        handleMouseMove();
+        window.addEventListener('mousemove', handleMouseMove);
+        return () => {
+            setCursorVisibility(true);
+            window.removeEventListener('mousemove', handleMouseMove);
+            clearTimeout(mouseInactiveTimeout.current);
+        };
+    }, []);
+};