ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
128 lines • 14.6 kB
JavaScript
/**
* 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 { ChangeDetectionStrategy, Component, EventEmitter, Input, Output, ViewChild, ViewEncapsulation } from '@angular/core';
export class NzOptionContainerComponent {
constructor() {
this.notFoundContent = undefined;
this.menuItemSelectedIcon = null;
this.dropdownRender = null;
this.activatedValue = null;
this.listOfSelectedValue = [];
this.mode = 'default';
this.matchWidth = true;
this.itemSize = 32;
this.maxItemLength = 8;
this.listOfContainerItem = [];
this.itemClick = new EventEmitter();
this.scrollToBottom = new EventEmitter();
this.scrolledIndex = 0;
}
onItemClick(value) {
this.itemClick.emit(value);
}
onItemHover(value) {
// TODO: keydown.enter won't activate this value
this.activatedValue = value;
}
trackValue(_index, option) {
return option.key;
}
onScrolledIndexChange(index) {
this.scrolledIndex = index;
if (index === this.listOfContainerItem.length - this.maxItemLength) {
this.scrollToBottom.emit();
}
}
scrollToActivatedValue() {
const index = this.listOfContainerItem.findIndex(item => this.compareWith(item.key, this.activatedValue));
if (index < this.scrolledIndex || index >= this.scrolledIndex + this.maxItemLength) {
this.cdkVirtualScrollViewport.scrollToIndex(index || 0);
}
}
ngOnChanges(changes) {
const { listOfContainerItem, activatedValue } = changes;
if (listOfContainerItem || activatedValue) {
this.scrollToActivatedValue();
}
}
ngAfterViewInit() {
setTimeout(() => this.scrollToActivatedValue());
}
}
NzOptionContainerComponent.decorators = [
{ type: Component, args: [{
selector: 'nz-option-container',
exportAs: 'nzOptionContainer',
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None,
preserveWhitespaces: false,
template: `
<div>
<div *ngIf="listOfContainerItem.length === 0" class="ant-select-item-empty">
<nz-embed-empty nzComponentName="select" [specificContent]="notFoundContent!"></nz-embed-empty>
</div>
<cdk-virtual-scroll-viewport
[class.full-width]="!matchWidth"
[itemSize]="itemSize"
[maxBufferPx]="itemSize * maxItemLength"
[minBufferPx]="itemSize * maxItemLength"
(scrolledIndexChange)="onScrolledIndexChange($event)"
[style.height.px]="listOfContainerItem.length * itemSize"
[style.max-height.px]="itemSize * maxItemLength"
>
<ng-template
cdkVirtualFor
[cdkVirtualForOf]="listOfContainerItem"
[cdkVirtualForTrackBy]="trackValue"
[cdkVirtualForTemplateCacheSize]="0"
let-item
>
<ng-container [ngSwitch]="item.type">
<nz-option-item-group *ngSwitchCase="'group'" [nzLabel]="item.groupLabel"></nz-option-item-group>
<nz-option-item
*ngSwitchCase="'item'"
[icon]="menuItemSelectedIcon"
[customContent]="item.nzCustomContent"
[template]="item.template"
[grouped]="!!item.groupLabel"
[disabled]="item.nzDisabled"
[showState]="mode === 'tags' || mode === 'multiple'"
[label]="item.nzLabel"
[compareWith]="compareWith"
[activatedValue]="activatedValue"
[listOfSelectedValue]="listOfSelectedValue"
[value]="item.nzValue"
(itemHover)="onItemHover($event)"
(itemClick)="onItemClick($event)"
></nz-option-item>
</ng-container>
</ng-template>
</cdk-virtual-scroll-viewport>
<ng-template [ngTemplateOutlet]="dropdownRender"></ng-template>
</div>
`,
host: {
'[class.ant-select-dropdown]': 'true'
}
},] }
];
NzOptionContainerComponent.propDecorators = {
notFoundContent: [{ type: Input }],
menuItemSelectedIcon: [{ type: Input }],
dropdownRender: [{ type: Input }],
activatedValue: [{ type: Input }],
listOfSelectedValue: [{ type: Input }],
compareWith: [{ type: Input }],
mode: [{ type: Input }],
matchWidth: [{ type: Input }],
itemSize: [{ type: Input }],
maxItemLength: [{ type: Input }],
listOfContainerItem: [{ type: Input }],
itemClick: [{ type: Output }],
scrollToBottom: [{ type: Output }],
cdkVirtualScrollViewport: [{ type: ViewChild, args: [CdkVirtualScrollViewport, { static: true },] }]
};
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* Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  Component,\n  EventEmitter,\n  Input,\n  OnChanges,\n  Output,\n  SimpleChanges,\n  TemplateRef,\n  ViewChild,\n  ViewEncapsulation\n} from '@angular/core';\nimport { NzSafeAny } from 'ng-zorro-antd/core/types';\nimport { NzSelectItemInterface, NzSelectModeType } from './select.types';\n\n@Component({\n  selector: 'nz-option-container',\n  exportAs: 'nzOptionContainer',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  preserveWhitespaces: false,\n  template: `\n    <div>\n      <div *ngIf=\"listOfContainerItem.length === 0\" class=\"ant-select-item-empty\">\n        <nz-embed-empty nzComponentName=\"select\" [specificContent]=\"notFoundContent!\"></nz-embed-empty>\n      </div>\n      <cdk-virtual-scroll-viewport\n        [class.full-width]=\"!matchWidth\"\n        [itemSize]=\"itemSize\"\n        [maxBufferPx]=\"itemSize * maxItemLength\"\n        [minBufferPx]=\"itemSize * maxItemLength\"\n        (scrolledIndexChange)=\"onScrolledIndexChange($event)\"\n        [style.height.px]=\"listOfContainerItem.length * itemSize\"\n        [style.max-height.px]=\"itemSize * maxItemLength\"\n      >\n        <ng-template\n          cdkVirtualFor\n          [cdkVirtualForOf]=\"listOfContainerItem\"\n          [cdkVirtualForTrackBy]=\"trackValue\"\n          [cdkVirtualForTemplateCacheSize]=\"0\"\n          let-item\n        >\n          <ng-container [ngSwitch]=\"item.type\">\n            <nz-option-item-group *ngSwitchCase=\"'group'\" [nzLabel]=\"item.groupLabel\"></nz-option-item-group>\n            <nz-option-item\n              *ngSwitchCase=\"'item'\"\n              [icon]=\"menuItemSelectedIcon\"\n              [customContent]=\"item.nzCustomContent\"\n              [template]=\"item.template\"\n              [grouped]=\"!!item.groupLabel\"\n              [disabled]=\"item.nzDisabled\"\n              [showState]=\"mode === 'tags' || mode === 'multiple'\"\n              [label]=\"item.nzLabel\"\n              [compareWith]=\"compareWith\"\n              [activatedValue]=\"activatedValue\"\n              [listOfSelectedValue]=\"listOfSelectedValue\"\n              [value]=\"item.nzValue\"\n              (itemHover)=\"onItemHover($event)\"\n              (itemClick)=\"onItemClick($event)\"\n            ></nz-option-item>\n          </ng-container>\n        </ng-template>\n      </cdk-virtual-scroll-viewport>\n      <ng-template [ngTemplateOutlet]=\"dropdownRender\"></ng-template>\n    </div>\n  `,\n  host: {\n    '[class.ant-select-dropdown]': 'true'\n  }\n})\nexport class NzOptionContainerComponent implements OnChanges, AfterViewInit {\n  @Input() notFoundContent: string | TemplateRef<NzSafeAny> | undefined = undefined;\n  @Input() menuItemSelectedIcon: TemplateRef<NzSafeAny> | null = null;\n  @Input() dropdownRender: TemplateRef<NzSafeAny> | null = null;\n  @Input() activatedValue: NzSafeAny | null = null;\n  @Input() listOfSelectedValue: NzSafeAny[] = [];\n  @Input() compareWith!: (o1: NzSafeAny, o2: NzSafeAny) => boolean;\n  @Input() mode: NzSelectModeType = 'default';\n  @Input() matchWidth = true;\n  @Input() itemSize = 32;\n  @Input() maxItemLength = 8;\n  @Input() listOfContainerItem: NzSelectItemInterface[] = [];\n  @Output() readonly itemClick = new EventEmitter<NzSafeAny>();\n  @Output() readonly scrollToBottom = new EventEmitter<void>();\n  @ViewChild(CdkVirtualScrollViewport, { static: true }) cdkVirtualScrollViewport!: CdkVirtualScrollViewport;\n  private scrolledIndex = 0;\n\n  onItemClick(value: NzSafeAny): void {\n    this.itemClick.emit(value);\n  }\n\n  onItemHover(value: NzSafeAny): void {\n    // TODO: keydown.enter won't activate this value\n    this.activatedValue = value;\n  }\n\n  trackValue(_index: number, option: NzSelectItemInterface): NzSafeAny {\n    return option.key;\n  }\n\n  onScrolledIndexChange(index: number): void {\n    this.scrolledIndex = index;\n    if (index === this.listOfContainerItem.length - this.maxItemLength) {\n      this.scrollToBottom.emit();\n    }\n  }\n\n  scrollToActivatedValue(): void {\n    const index = this.listOfContainerItem.findIndex(item => this.compareWith(item.key, this.activatedValue));\n    if (index < this.scrolledIndex || index >= this.scrolledIndex + this.maxItemLength) {\n      this.cdkVirtualScrollViewport.scrollToIndex(index || 0);\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    const { listOfContainerItem, activatedValue } = changes;\n    if (listOfContainerItem || activatedValue) {\n      this.scrollToActivatedValue();\n    }\n  }\n  ngAfterViewInit(): void {\n    setTimeout(() => this.scrollToActivatedValue());\n  }\n}\n"]}