@angular/cdk
Version:
Angular Material Component Development Kit
68 lines • 6.32 kB
JavaScript
import { __values } from "tslib";
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { Injectable } from '@angular/core';
import * as i0 from "@angular/core";
/**
* Class to coordinate unique selection based on name.
* Intended to be consumed as an Angular service.
* This service is needed because native radio change events are only fired on the item currently
* being selected, and we still need to uncheck the previous selection.
*
* This service does not *store* any IDs and names because they may change at any time, so it is
* less error-prone if they are simply passed through when the events occur.
*/
var UniqueSelectionDispatcher = /** @class */ (function () {
function UniqueSelectionDispatcher() {
this._listeners = [];
}
/**
* Notify other items that selection for the given name has been set.
* @param id ID of the item.
* @param name Name of the item.
*/
UniqueSelectionDispatcher.prototype.notify = function (id, name) {
var e_1, _a;
try {
for (var _b = __values(this._listeners), _c = _b.next(); !_c.done; _c = _b.next()) {
var listener = _c.value;
listener(id, name);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_1) throw e_1.error; }
}
};
/**
* Listen for future changes to item selection.
* @return Function used to deregister listener
*/
UniqueSelectionDispatcher.prototype.listen = function (listener) {
var _this = this;
this._listeners.push(listener);
return function () {
_this._listeners = _this._listeners.filter(function (registered) {
return listener !== registered;
});
};
};
UniqueSelectionDispatcher.prototype.ngOnDestroy = function () {
this._listeners = [];
};
UniqueSelectionDispatcher.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] }
];
UniqueSelectionDispatcher.ɵprov = i0.ɵɵdefineInjectable({ factory: function UniqueSelectionDispatcher_Factory() { return new UniqueSelectionDispatcher(); }, token: UniqueSelectionDispatcher, providedIn: "root" });
return UniqueSelectionDispatcher;
}());
export { UniqueSelectionDispatcher };
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