remember ceval state in session storage

ui/ceval/src/ctrl.ts

@@ -46,6 +46,12 @@ function median(values: number[]): number {
   return values.length % 2 ? values[half] : (values[half - 1] + values[half]) / 2.0;
 }
 
+function enabledAfterDisable() {
+  const enabledAfter = lichess.tempStorage.get('ceval.enabled-after');
+  const disable = lichess.storage.get('ceval.disable');
+  return !disable || enabledAfter === disable;
+}
+
 export default function(opts: CevalOpts): CevalCtrl {
   const storageKey = (k: string) => {
     return opts.storageKeyPrefix ? `${opts.storageKeyPrefix}.${k}` : k;
@@ -81,7 +87,7 @@ export default function(opts: CevalOpts): CevalCtrl {
   const infinite = storedProp('ceval.infinite', false);
   let curEval: Tree.ClientEval | null = null;
   const allowed = prop(true);
-  const enabled = prop(false);
+  const enabled = prop(opts.possible && allowed() && enabledAfterDisable());
   let started: Started | false = false;
   let lastStarted: Started | false = false; // last started object (for going deeper even if stopped)
   const hovering = prop<Hovering | null>(null);
@@ -135,7 +141,7 @@ export default function(opts: CevalOpts): CevalCtrl {
     npsRecorder(ev);
     curEval = ev;
     opts.emit(ev, work);
-    if (ev.fen !== lastEmitFen) {
+    if (ev.fen !== lastEmitFen && enabledAfterDisable()) { // amnesty while auto disable not processed
       lastEmitFen = ev.fen;
       lichess.storage.fire('ceval.fen', ev.fen);
     }
@@ -150,7 +156,7 @@ export default function(opts: CevalOpts): CevalCtrl {
 
   const start = (path: Tree.Path, steps: Step[], threatMode: boolean, deeper: boolean) => {
 
-    if (!enabled() || !opts.possible) return;
+    if (!enabled() || !opts.possible || !enabledAfterDisable()) return;
 
     isDeeper(deeper);
     const maxD = effectiveMaxDepth();
@@ -190,6 +196,10 @@ export default function(opts: CevalOpts): CevalCtrl {
       }
     }
 
+    // Notify all other tabs to disable ceval.
+    lichess.storage.fire('ceval.disable');
+    lichess.tempStorage.set('ceval.enabled-after', lichess.storage.get('ceval.disable')!);
+
     pool.start(work);
 
     started = {
@@ -238,7 +248,14 @@ export default function(opts: CevalOpts): CevalCtrl {
     toggle() {
       if (!opts.possible || !allowed()) return;
       stop();
-      enabled(!enabled());
+      if (!enabled() && !document.hidden) {
+        const disable = lichess.storage.get('ceval.disable');
+        if (disable) lichess.tempStorage.set('ceval.enabled-after', disable);
+        enabled(true);
+      } else {
+        lichess.tempStorage.set('ceval.enabled-after', '');
+        enabled(false);
+      }
     },
     curDepth: () => curEval ? curEval.depth : 0,
     effectiveMaxDepth,

ui/ceval/src/main.ts

@@ -9,7 +9,7 @@ export { ctrl, view, winningChances };
 // stop when another tab starts. Listen only once here,
 // as the ctrl can be instantiated several times.
 // gotta do the click on the toggle to have it visually change.
-lichess.storage.make('ceval.disable').listen(_ => {
+lichess.storage.make('ceval.disable').listen(() => {
   const toggle = document.getElementById('analyse-toggle-ceval') as HTMLInputElement | undefined;
   if (toggle?.checked) toggle.click();
 });

ui/ceval/src/pool.ts

@@ -144,7 +144,6 @@ export class Pool {
   }
 
   start(work: Work): void {
-    lichess.storage.fire('ceval.disable'); // disable on all other tabs
     this.getWorker().then(function(worker) {
       worker.start(work);
     }).catch(function(error) {

ui/round/src/cevalSub.ts

@@ -17,9 +17,9 @@ export function subscribe(ctrl: RoundController): void {
   // bots can cheat alright
   if (ctrl.data.player.user && ctrl.data.player.user.title === 'BOT') return;
 
-  // Disable ceval. Unless this game is loaded directly on a position being
+  // Notify tabs to disable ceval. Unless this game is loaded directly on a
-  // analysed, there is plenty of time (7 moves, in most cases) for this to
+  // position being analysed, there is plenty of time (7 moves, in most cases)
-  // take effect.
+  // for this to take effect.
   lichess.storage.fire('ceval.disable');
 
   lichess.storage.make('ceval.fen').listen(e => {