MOBILE-4202 split-view: Scroll to current element when swipe

src/core/classes/items-management/items-manager.ts

@@ -103,6 +103,10 @@ export abstract class CoreItemsManager<
      * @param item Item, null if none.
      */
     setSelectedItem(item: Item | null): void {
+        if (item === this.selectedItem) {
+            return;
+        }
+
         this.selectedItem = item;
 
         this.listeners.forEach(listener => listener.onSelectedItemUpdated?.call(listener, item));

src/core/classes/items-management/list-items-manager.ts

@@ -22,6 +22,7 @@ import { CoreUtils } from '@services/utils/utils';
 
 import { CoreRoutedItemsManagerSource } from './routed-items-manager-source';
 import { CoreRoutedItemsManager } from './routed-items-manager';
+import { CoreDom } from '@singletons/dom';
 
 /**
  * Helper class to manage the state and routing of a list of items in a page.
@@ -129,6 +130,7 @@ export class CoreListItemsManager<
         }
 
         await this.navigateToItem(item, { reset: this.resetNavigation() });
+        setTimeout(async () => await this.scrollToCurrentElement(), 100);
     }
 
     /**
@@ -196,10 +198,33 @@ export class CoreListItemsManager<
         super.updateSelectedItem(route);
 
         const selectDefault = CoreScreen.isTablet && this.selectedItem === null && this.splitView && !this.splitView.isNested;
-
         this.select(selectDefault ? this.getDefaultItem() : this.selectedItem);
     }
 
+    /**
+     * Scroll to current element in split-view list.
+     */
+    protected async scrollToCurrentElement(): Promise<void> {
+        if (CoreScreen.isMobile) {
+            return;
+        }
+
+        const element = this.splitView?.nativeElement ?? document;
+        const currentItem = element.querySelector<HTMLElement>('[aria-current="page"]');
+
+        if (!currentItem) {
+            return;
+        }
+
+        const isElementInViewport = CoreDom.isElementInViewport(currentItem, 1, this.splitView?.nativeElement);
+
+        if (isElementInViewport) {
+            return;
+        }
+
+        currentItem.scrollIntoView({ behavior: 'smooth' });
+    }
+
     /**
      * Get the item that should be selected by default.
      *

src/core/classes/items-management/routed-items-manager.ts

@@ -152,6 +152,11 @@ export abstract class CoreRoutedItemsManager<
      */
     protected onSourceItemsUpdated(items: Item[]): void {
         super.onSourceItemsUpdated(items);
+        const selectedItem = this.selectedItem;
+
+        if (selectedItem !== null && items.some(item => item === selectedItem)) {
+            return;
+        }
 
         this.updateSelectedItem();
     }

src/core/classes/tests/swipe-navigation-items-manager.test.ts

@@ -81,6 +81,8 @@ describe('CoreSwipeNavigationItemsManager', () => {
 
         await source.load();
 
+        instance.setSelectedItem(items[0]);
+
         // Act.
         await instance.navigateToNextItem();
 
@@ -96,6 +98,8 @@ describe('CoreSwipeNavigationItemsManager', () => {
 
         await source.load();
 
+        instance.setSelectedItem(items[1]);
+
         // Act.
         await instance.navigateToPreviousItem();
 
@@ -112,6 +116,8 @@ describe('CoreSwipeNavigationItemsManager', () => {
 
         await source.load();
 
+        instance.setSelectedItem(items[0]);
+
         // Act.
         await instance.navigateToNextItem();
 
@@ -127,6 +133,8 @@ describe('CoreSwipeNavigationItemsManager', () => {
 
         await source.load();
 
+        instance.setSelectedItem(items[0]);
+
         // Assert.
         await expect(instance.hasNextItem()).resolves.toBe(true);
         await expect(instance.hasPreviousItem()).resolves.toBe(false);

src/core/components/split-view/split-view.ts

@@ -57,6 +57,10 @@ export class CoreSplitViewComponent implements AfterViewInit, OnDestroy {
         return this.outletRouteSubject.asObservable();
     }
 
+    get nativeElement(): HTMLElement {
+        return this.element.nativeElement;
+    }
+
     /**
      * @inheritdoc
      */

src/core/singletons/dom.ts

@@ -88,21 +88,23 @@ export class CoreDom {
      *
      * @param element Element to check.
      * @param intersectionRatio Intersection ratio (From 0 to 1).
+     * @param container Container where element is located
      * @returns True if in viewport.
      */
-    static isElementInViewport(element: HTMLElement, intersectionRatio = 1): boolean {
+    static isElementInViewport(element: HTMLElement, intersectionRatio = 1, container: HTMLElement | null = null): boolean {
         const elementRectangle = element.getBoundingClientRect();
-
+        const containerRectangle = container?.getBoundingClientRect();
         const elementArea = elementRectangle.width * elementRectangle.height;
+
         if (elementArea == 0) {
             return false;
         }
 
         const intersectionRectangle = {
-            top: Math.max(0, elementRectangle.top),
-            left: Math.max(0, elementRectangle.left),
-            bottom: Math.min(window.innerHeight, elementRectangle.bottom),
-            right: Math.min(window.innerWidth, elementRectangle.right),
+            top: Math.max(containerRectangle?.top ?? 0, elementRectangle.top),
+            left: Math.max(containerRectangle?.left ?? 0, elementRectangle.left),
+            bottom: Math.min(containerRectangle?.bottom ?? window.innerHeight, elementRectangle.bottom),
+            right: Math.min(containerRectangle?.right ?? window.innerWidth, elementRectangle.right),
         };
 
         const intersectionArea = (intersectionRectangle.right - intersectionRectangle.left) *