[PM-8380] Browser Refresh - Virtual scrolling (#10646)

* [PM-8380] Add option to disable content padding for popup page

* [PM-8380] Add cdkVirtualScroll to vault list items and fixed item heights

* [PM-8380] Move item height constants to item component

apps/browser/src/platform/popup/layout/popup-page.component.html

@@ -17,7 +17,8 @@
     [ngClass]="{ 'tw-invisible': loading }"
   >
     <div
-      class="tw-max-w-screen-sm tw-mx-auto tw-p-3 tw-flex-1 tw-flex tw-flex-col tw-h-full tw-w-full"
+      class="tw-max-w-screen-sm tw-mx-auto tw-flex-1 tw-flex tw-flex-col tw-h-full tw-w-full"
+      [ngClass]="{ 'tw-p-3': !disablePadding }"
     >
       <ng-content></ng-content>
     </div>

apps/browser/src/platform/popup/layout/popup-page.component.ts

@@ -1,5 +1,5 @@
 import { CommonModule } from "@angular/common";
-import { Component, Input, inject, signal } from "@angular/core";
+import { booleanAttribute, Component, inject, Input, signal } from "@angular/core";
 
 import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
 
@@ -17,6 +17,9 @@ export class PopupPageComponent {
 
   @Input() loading = false;
 
+  @Input({ transform: booleanAttribute })
+  disablePadding = false;
+
   protected scrolled = signal(false);
   isScrolled = this.scrolled.asReadonly();
 

apps/browser/src/vault/popup/components/vault-v2/vault-list-items-container/vault-list-items-container.component.html

@@ -17,11 +17,13 @@
     {{ description }}
   </div>
   <bit-item-group>
-    <bit-item *ngFor="let cipher of ciphers">
+    <cdk-virtual-scroll-viewport [itemSize]="ItemHeight">
+      <bit-item *cdkVirtualFor="let cipher of ciphers">
         <a
           bit-item-content
           (click)="onViewCipher(cipher)"
           [appA11yTitle]="'viewItemTitle' | i18n: cipher.name"
+          class="{{ ItemHeightClass }}"
         >
           <app-vault-icon slot="start" [cipher]="cipher"></app-vault-icon>
           <span data-testid="item-name">{{ cipher.name }}</span>
@@ -59,5 +61,6 @@
           ></app-item-more-options>
         </ng-container>
       </bit-item>
+    </cdk-virtual-scroll-viewport>
   </bit-item-group>
 </bit-section>

apps/browser/src/vault/popup/components/vault-v2/vault-list-items-container/vault-list-items-container.component.ts

@@ -1,3 +1,4 @@
+import { ScrollingModule } from "@angular/cdk/scrolling";
 import { CommonModule } from "@angular/common";
 import { booleanAttribute, Component, EventEmitter, Input, Output } from "@angular/core";
 import { Router, RouterLink } from "@angular/router";
@@ -6,6 +7,8 @@ import { JslibModule } from "@bitwarden/angular/jslib.module";
 import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
 import {
   BadgeModule,
+  BitItemHeight,
+  BitItemHeightClass,
   ButtonModule,
   IconButtonModule,
   ItemModule,
@@ -35,12 +38,16 @@ import { ItemMoreOptionsComponent } from "../item-more-options/item-more-options
     ItemCopyActionsComponent,
     ItemMoreOptionsComponent,
     OrgIconDirective,
+    ScrollingModule,
   ],
   selector: "app-vault-list-items-container",
   templateUrl: "vault-list-items-container.component.html",
   standalone: true,
 })
 export class VaultListItemsContainerComponent {
+  protected ItemHeightClass = BitItemHeightClass;
+  protected ItemHeight = BitItemHeight;
+
   /**
    * The list of ciphers to display.
    */

apps/browser/src/vault/popup/components/vault/vault-v2.component.html

@@ -1,4 +1,4 @@
-<popup-page [loading]="loading$ | async">
+<popup-page [loading]="loading$ | async" disablePadding>
   <popup-header slot="header" [pageTitle]="'vault' | i18n">
     <ng-container slot="end">
       <app-new-item-dropdown [initialValues]="newItemItemValues$ | async"></app-new-item-dropdown>
@@ -54,7 +54,7 @@
       </div>
     </div>
 
-    <ng-container *ngIf="vaultState === null">
+    <div *ngIf="vaultState === null" cdkVirtualScrollingElement class="tw-h-full tw-p-3">
       <app-autofill-vault-list-items></app-autofill-vault-list-items>
       <app-vault-list-items-container
         [title]="'favorites' | i18n"
@@ -67,6 +67,6 @@
         id="allItems"
         disableSectionMargin
       ></app-vault-list-items-container>
-    </ng-container>
+    </div>
   </ng-container>
 </popup-page>

apps/browser/src/vault/popup/components/vault/vault-v2.component.ts

@@ -1,3 +1,4 @@
+import { ScrollingModule } from "@angular/cdk/scrolling";
 import { CommonModule } from "@angular/common";
 import { Component, OnDestroy, OnInit } from "@angular/core";
 import { takeUntilDestroyed } from "@angular/core/rxjs-interop";
@@ -51,6 +52,7 @@ enum VaultState {
     RouterLink,
     VaultV2SearchComponent,
     NewItemDropdownV2Component,
+    ScrollingModule,
   ],
   providers: [VaultUiOnboardingService],
 })

libs/components/src/item/index.ts

@@ -1 +1,3 @@
 export * from "./item.module";
+
+export { BitItemHeight, BitItemHeightClass } from "./item.component";

libs/components/src/item/item.component.ts

@@ -5,6 +5,20 @@ import { A11yRowDirective } from "../a11y/a11y-row.directive";
 
 import { ItemActionComponent } from "./item-action.component";
 
+/**
+ * The class used to set the height of a bit item's inner content.
+ */
+export const BitItemHeightClass = `tw-h-[52px]`;
+
+/**
+ * The height of a bit item in pixels. Includes any margin, padding, or border. Used by the virtual scroll
+ * to estimate how many items can be displayed at once and how large the virtual container should be.
+ * Needs to be updated if the item height or spacing changes.
+ *
+ * 52px + 5.25px bottom margin + 1px border = 58.25px
+ */
+export const BitItemHeight = 58.25; //
+
 @Component({
   selector: "bit-item",
   standalone: true,