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/**
* @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 { DOCUMENT } from '@angular/common';
import { Inject, Injectable } from '@angular/core';
import * as i0 from "@angular/core";
import * as i1 from "@angular/common";
/**
* Service for dispatching events that land on the body to appropriate overlay ref,
* if any. It maintains a list of attached overlays to determine best suited overlay based
* on event target and order of overlay opens.
*/
import * as ɵngcc0 from '@angular/core';
export class BaseOverlayDispatcher {
constructor(document) {
/** Currently attached overlays in the order they were attached. */
this._attachedOverlays = [];
this._document = document;
}
ngOnDestroy() {
this.detach();
}
/** Add a new overlay to the list of attached overlay refs. */
add(overlayRef) {
// Ensure that we don't get the same overlay multiple times.
this.remove(overlayRef);
this._attachedOverlays.push(overlayRef);
}
/** Remove an overlay from the list of attached overlay refs. */
remove(overlayRef) {
const index = this._attachedOverlays.indexOf(overlayRef);
if (index > -1) {
this._attachedOverlays.splice(index, 1);
}
// Remove the global listener once there are no more overlays.
if (this._attachedOverlays.length === 0) {
this.detach();
}
}
}
BaseOverlayDispatcher.ɵfac = function BaseOverlayDispatcher_Factory(t) { return new (t || BaseOverlayDispatcher)(ɵngcc0.ɵɵinject(DOCUMENT)); };
BaseOverlayDispatcher.ɵprov = i0.ɵɵdefineInjectable({ factory: function BaseOverlayDispatcher_Factory() { return new BaseOverlayDispatcher(i0.ɵɵinject(i1.DOCUMENT)); }, token: BaseOverlayDispatcher, providedIn: "root" });
BaseOverlayDispatcher.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
(function () { (typeof ngDevMode === "undefined" || ngDevMode) && ɵngcc0.ɵsetClassMetadata(BaseOverlayDispatcher, [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], function () { return [{ type: undefined, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }]; }, null); })();
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