@taiga-ui/cdk/fesm2022/taiga-ui-cdk-utils-di.mjs

Base library for creating Angular components and applications using Taiga UI principles regarding of actual visual appearance

import { inject, InjectionToken, isSignal, signal, effect } from '@angular/core';
import { tuiSetSignal } from '@taiga-ui/cdk/utils/miscellaneous';

function tuiProvideOptions(provide, options, fallback) {
    return {
        provide,
        useFactory: () => ({
            ...(inject(provide, { optional: true, skipSelf: true }) || fallback),
            ...(inject(options, { optional: true }) ||
                (typeof options === 'function' ? options() : options)),
        }),
    };
}

function tuiCreateOptions(defaults) {
    const token = new InjectionToken(ngDevMode ? 'Options token' : '', {
        factory: () => defaults,
    });
    return [token, (options) => tuiProvideOptions(token, options, defaults)];
}

// TODO: Consider {} as default options instead
function tuiDirectiveBinding(token, key, initial, options = { self: true }) {
    const result = isSignal(initial) ? initial : signal(initial);
    const directive = inject(token, options);
    const output = directive?.[`${key.toString()}Change`];
    if (!directive) {
        return result;
    }
    // TODO: Figure out why effects are executed all the time and not just when result changes (check with Angular 18)
    let previous;
    effect(() => {
        const value = result();
        if (previous === value) {
            return;
        }
        if (isSignal(directive[key])) {
            tuiSetSignal(directive[key], value);
        }
        else {
            directive[key] = value;
        }
        directive.ngOnChanges?.({});
        output?.emit?.(value);
        previous = value;
    });
    return result;
}

function tuiProvide(provide, useExisting, multi = false) {
    return { provide, useExisting, multi };
}

/**
 * Generated bundle index. Do not edit.
 */

export { tuiCreateOptions, tuiDirectiveBinding, tuiProvide, tuiProvideOptions };
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