@nebular/theme
Version:
@nebular/theme
87 lines • 3.1 kB
JavaScript
/*
* @license
* Copyright Akveo. All Rights Reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*/
import { ChangeDetectionStrategy, Component, ContentChildren, HostBinding, Input, QueryList, } from '@angular/core';
import { takeUntil } from 'rxjs/operators';
import { from, Subject } from 'rxjs';
import { convertToBoolProperty } from '../helpers';
import { NbOptionComponent } from './option.component';
/**
* NbOptionGroupComponent
*
* @styles
*
* option-group-text-color:
* option-group-tiny-start-padding:
* option-group-small-start-padding:
* option-group-medium-start-padding:
* option-group-large-start-padding:
* option-group-giant-start-padding:
**/
export class NbOptionGroupComponent {
constructor() {
this.destroy$ = new Subject();
this._disabled = false;
}
get disabled() {
return this._disabled;
}
set disabled(value) {
this._disabled = convertToBoolProperty(value);
if (this.options) {
this.updateOptionsDisabledState();
}
}
get disabledAttribute() {
return this.disabled ? '' : null;
}
ngAfterContentInit() {
if (this.options.length) {
this.asyncUpdateOptionsDisabledState();
}
this.options.changes
.pipe(takeUntil(this.destroy$))
.subscribe(() => this.asyncUpdateOptionsDisabledState());
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
/**
* Sets disabled state for each option to current group disabled state.
*/
updateOptionsDisabledState() {
this.options.forEach((option) => option.setDisabledByGroupState(this.disabled));
}
/**
* Updates options disabled state after promise resolution.
* This way change detection will be triggered after options state updated.
* Use this method when updating options during change detection run (e.g. QueryList.changes, lifecycle hooks).
*/
asyncUpdateOptionsDisabledState() {
// Wrap Promise into Observable with `takeUntil(this.destroy$)` to prevent update if component destroyed.
from(Promise.resolve())
.pipe(takeUntil(this.destroy$))
.subscribe(() => this.updateOptionsDisabledState());
}
}
NbOptionGroupComponent.decorators = [
{ type: Component, args: [{
selector: 'nb-option-group',
changeDetection: ChangeDetectionStrategy.OnPush,
template: `
<span class="option-group-title">{{ title }}</span>
<ng-content select="nb-option, ng-container"></ng-content>
`,
styles: [":host{display:block}.option-group-title{display:block}\n"]
},] }
];
NbOptionGroupComponent.propDecorators = {
title: [{ type: Input }],
disabled: [{ type: Input }],
disabledAttribute: [{ type: HostBinding, args: ['attr.disabled',] }],
options: [{ type: ContentChildren, args: [NbOptionComponent, { descendants: true },] }]
};
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