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perf(module:select): do not run change detection on events if the nz-option-item is disabled #7133

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merged 1 commit into from
Feb 25, 2022
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perf(module:select): do not run change detection on events if the nz-option-item is disabled #7133

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57 changes: 38 additions & 19 deletions components/select/option-item.component.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,25 +6,31 @@
import {
ChangeDetectionStrategy,
Component,
ElementRef,
EventEmitter,
Input,
NgZone,
OnChanges,
OnInit,
Output,
SimpleChanges,
TemplateRef,
ViewEncapsulation
} from '@angular/core';
import { fromEvent } from 'rxjs';
import { takeUntil } from 'rxjs/operators';

import { NzDestroyService } from 'ng-zorro-antd/core/services';
import { NzSafeAny } from 'ng-zorro-antd/core/types';

@Component({
selector: 'nz-option-item',
template: `
<div class="ant-select-item-option-content">
<ng-container *ngIf="!customContent">{{ label }}</ng-container>
<ng-container *ngIf="customContent">
<ng-template [ngIf]="customContent" [ngIfElse]="noCustomContent">
<ng-template [ngTemplateOutlet]="template"></ng-template>
</ng-container>
</ng-template>
<ng-template #noCustomContent>{{ label }}</ng-template>
</div>
<div *ngIf="showState && selected" class="ant-select-item-option-state" style="user-select: none" unselectable="on">
<i nz-icon nzType="check" class="ant-select-selected-icon" *ngIf="!icon; else icon"></i>
Expand All @@ -38,12 +44,11 @@ import { NzSafeAny } from 'ng-zorro-antd/core/types';
'[class.ant-select-item-option-grouped]': 'grouped',
'[class.ant-select-item-option-selected]': 'selected && !disabled',
'[class.ant-select-item-option-disabled]': 'disabled',
'[class.ant-select-item-option-active]': 'activated && !disabled',
'(mouseenter)': 'onHostMouseEnter()',
'(click)': 'onHostClick()'
}
'[class.ant-select-item-option-active]': 'activated && !disabled'
},
providers: [NzDestroyService]
})
export class NzOptionItemComponent implements OnChanges {
export class NzOptionItemComponent implements OnChanges, OnInit {
selected = false;
activated = false;
@Input() grouped = false;
Expand All @@ -60,18 +65,12 @@ export class NzOptionItemComponent implements OnChanges {
@Output() readonly itemClick = new EventEmitter<NzSafeAny>();
@Output() readonly itemHover = new EventEmitter<NzSafeAny>();

constructor() {}
constructor(
private elementRef: ElementRef<HTMLElement>,
private ngZone: NgZone,
private destroy$: NzDestroyService
) {}

onHostMouseEnter(): void {
if (!this.disabled) {
this.itemHover.next(this.value);
}
}
onHostClick(): void {
if (!this.disabled) {
this.itemClick.next(this.value);
}
}
ngOnChanges(changes: SimpleChanges): void {
const { value, activatedValue, listOfSelectedValue } = changes;
if (value || listOfSelectedValue) {
Expand All @@ -81,4 +80,24 @@ export class NzOptionItemComponent implements OnChanges {
this.activated = this.compareWith(this.activatedValue, this.value);
}
}

ngOnInit(): void {
this.ngZone.runOutsideAngular(() => {
fromEvent(this.elementRef.nativeElement, 'click')
.pipe(takeUntil(this.destroy$))
.subscribe(() => {
if (!this.disabled) {
this.ngZone.run(() => this.itemClick.emit(this.value));
}
});

fromEvent(this.elementRef.nativeElement, 'mouseenter')
.pipe(takeUntil(this.destroy$))
.subscribe(() => {
if (!this.disabled) {
this.ngZone.run(() => this.itemHover.emit(this.value));
}
});
});
}
}