Masquer le menu pendant le defilement

ChessCubing.App/wwwroot/js/chesscubing-interop.js

@@ -3,6 +3,9 @@
   let viewportStarted = false;
   let audioContext = null;
   let authModalMessageHandler = null;
+  let menuScrollStarted = false;
+  let menuLastScrollY = 0;
+  let menuAnimationFrame = 0;
 
   function syncViewportHeight() {
     const visibleHeight = window.visualViewport?.height ?? window.innerHeight;
@@ -38,6 +41,63 @@
     window.requestAnimationFrame(() => window.requestAnimationFrame(syncViewportHeight));
   }
 
+  function setMenuHidden(hidden) {
+    document.body.classList.toggle("site-menu-hidden", hidden);
+  }
+
+  function syncMenuVisibility() {
+    menuAnimationFrame = 0;
+
+    const menu = document.querySelector(".site-menu-shell");
+    if (!menu) {
+      setMenuHidden(false);
+      menuLastScrollY = window.scrollY || window.pageYOffset || 0;
+      return;
+    }
+
+    const modalIsOpen = document.querySelector(".modal:not(.hidden)");
+    if (modalIsOpen) {
+      setMenuHidden(false);
+      menuLastScrollY = window.scrollY || window.pageYOffset || 0;
+      return;
+    }
+
+    const currentScrollY = Math.max(window.scrollY || window.pageYOffset || 0, 0);
+    const delta = currentScrollY - menuLastScrollY;
+
+    if (currentScrollY <= 24 || delta < -10) {
+      setMenuHidden(false);
+    } else if (delta > 10 && currentScrollY > 120) {
+      setMenuHidden(true);
+    }
+
+    menuLastScrollY = currentScrollY;
+  }
+
+  function queueMenuVisibilitySync() {
+    if (menuAnimationFrame) {
+      return;
+    }
+
+    menuAnimationFrame = window.requestAnimationFrame(syncMenuVisibility);
+  }
+
+  function startMenuScrollTracking() {
+    if (menuScrollStarted) {
+      queueMenuVisibilitySync();
+      return;
+    }
+
+    menuScrollStarted = true;
+    menuLastScrollY = window.scrollY || window.pageYOffset || 0;
+    window.addEventListener("scroll", queueMenuVisibilitySync, { passive: true });
+    window.addEventListener("pageshow", queueMenuVisibilitySync);
+    window.addEventListener("resize", queueMenuVisibilitySync);
+    window.addEventListener("hashchange", queueMenuVisibilitySync);
+    window.setTimeout(queueMenuVisibilitySync, 0);
+    window.setTimeout(queueMenuVisibilitySync, 150);
+  }
+
   function getAudioContext() {
     const AudioContextClass = window.AudioContext || window.webkitAudioContext;
     if (!AudioContextClass) {
@@ -114,6 +174,11 @@
     start: startViewport,
   };
 
+  window.chesscubingMenu = {
+    start: startMenuScrollTracking,
+    sync: queueMenuVisibilitySync,
+  };
+
   window.chesscubingStorage = {
     getMatchState(storageKey, windowNameKey) {
       try {
@@ -246,4 +311,5 @@
   };
 
   startViewport();
+  startMenuScrollTracking();
 })();