UNPKG

ng-zorro-antd

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An enterprise-class UI components based on Ant Design and Angular

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/** * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE */ import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling'; import { CdkTree, CdkTreeNodeOutletContext } from '@angular/cdk/tree'; import { ChangeDetectionStrategy, Component, Input, ViewChild, ViewEncapsulation } from '@angular/core'; import { warnDeprecation } from 'ng-zorro-antd/core/logger'; import { NzTreeNodeOutletDirective } from './outlet'; import { NzTreeView } from './tree'; const DEFAULT_SIZE = 28; export class NzTreeVirtualScrollViewComponent extends NzTreeView { constructor() { super(...arguments); this.itemSize = DEFAULT_SIZE; /** * @deprecated use `nzItemSize` instead * @breaking-change 12.0.0 */ this.nzNodeWidth = DEFAULT_SIZE; this.nzItemSize = DEFAULT_SIZE; this.nzMinBufferPx = DEFAULT_SIZE * 5; this.nzMaxBufferPx = DEFAULT_SIZE * 10; this.nodes = []; } renderNodeChanges(data) { this.nodes = new Array(...data).map((n, i) => this.createNode(n, i)); } createNode(nodeData, index) { const node = this._getNodeDef(nodeData, index); const context = new CdkTreeNodeOutletContext(nodeData); if (this.treeControl.getLevel) { context.level = this.treeControl.getLevel(nodeData); } else { context.level = 0; } return { data: nodeData, context, nodeDef: node }; } ngOnChanges(changes) { const { nzNodeWidth, nzItemSize } = changes; if (nzNodeWidth) { warnDeprecation('`nzNodeWidth` in nz-tree-virtual-scroll-view will be removed in 12.0.0, please use `nzItemSize` instead.'); this.itemSize = nzNodeWidth.currentValue; } if (nzItemSize) { this.itemSize = nzItemSize.currentValue; } } } NzTreeVirtualScrollViewComponent.decorators = [ { type: Component, args: [{ selector: 'nz-tree-virtual-scroll-view', exportAs: 'nzTreeVirtualScrollView', template: ` <div class="ant-tree-list"> <cdk-virtual-scroll-viewport class="ant-tree-list-holder" [itemSize]="itemSize" [minBufferPx]="nzMinBufferPx" [maxBufferPx]="nzMaxBufferPx" > <ng-container *cdkVirtualFor="let item of nodes; let i = index"> <ng-template nzTreeVirtualScrollNodeOutlet [data]="item"></ng-template> </ng-container> </cdk-virtual-scroll-viewport> </div> <ng-container nzTreeNodeOutlet></ng-container> `, encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, providers: [ { provide: NzTreeView, useExisting: NzTreeVirtualScrollViewComponent }, { provide: CdkTree, useExisting: NzTreeVirtualScrollViewComponent } ], host: { class: 'ant-tree', '[class.ant-tree-block-node]': 'nzDirectoryTree || nzBlockNode', '[class.ant-tree-directory]': 'nzDirectoryTree', '[class.ant-tree-rtl]': `dir === 'rtl'` } },] } ]; NzTreeVirtualScrollViewComponent.propDecorators = { nodeOutlet: [{ type: ViewChild, args: [NzTreeNodeOutletDirective, { static: true },] }], virtualScrollViewport: [{ type: ViewChild, args: [CdkVirtualScrollViewport, { static: true },] }], nzNodeWidth: [{ type: Input }], nzItemSize: [{ type: Input }], nzMinBufferPx: [{ type: Input }], nzMaxBufferPx: [{ type: Input }] }; //# 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