{"version":3,"file":"cdk-observers.umd.js","sources":["cdk/observers.es5.js"],"sourcesContent":["/**\n * @license\n * Copyright Google Inc. All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport { Directive, ElementRef, EventEmitter, Injectable, Input, NgModule, NgZone, Output } from '@angular/core';\nimport { Subject } from 'rxjs/Subject';\nimport { RxChain, debounceTime } from '@angular/cdk/rxjs';\n\n/**\n * Factory that creates a new MutationObserver and allows us to stub it out in unit tests.\n * \\@docs-private\n */\nvar MatMutationObserverFactory = (function () {\n    function MatMutationObserverFactory() {\n    }\n    /**\n     * @param {?} callback\n     * @return {?}\n     */\n    MatMutationObserverFactory.prototype.create = function (callback) {\n        return typeof MutationObserver === 'undefined' ? null : new MutationObserver(callback);\n    };\n    MatMutationObserverFactory.decorators = [\n        { type: Injectable },\n    ];\n    /**\n     * @nocollapse\n     */\n    MatMutationObserverFactory.ctorParameters = function () { return []; };\n    return MatMutationObserverFactory;\n}());\n/**\n * Directive that triggers a callback whenever the content of\n * its associated element has changed.\n */\nvar ObserveContent = (function () {\n    /**\n     * @param {?} _mutationObserverFactory\n     * @param {?} _elementRef\n     * @param {?} _ngZone\n     */\n    function ObserveContent(_mutationObserverFactory, _elementRef, _ngZone) {\n        this._mutationObserverFactory = _mutationObserverFactory;\n        this._elementRef = _elementRef;\n        this._ngZone = _ngZone;\n        /**\n         * Event emitted for each change in the element's content.\n         */\n        this.event = new EventEmitter();\n        /**\n         * Used for debouncing the emitted values to the observeContent event.\n         */\n        this._debouncer = new Subject();\n    }\n    /**\n     * @return {?}\n     */\n    ObserveContent.prototype.ngAfterContentInit = function () {\n        var _this = this;\n        if (this.debounce > 0) {\n            this._ngZone.runOutsideAngular(function () {\n                RxChain.from(_this._debouncer)\n                    .call(debounceTime, _this.debounce)\n                    .subscribe(function (mutations) { return _this.event.emit(mutations); });\n            });\n        }\n        else {\n            this._debouncer.subscribe(function (mutations) { return _this.event.emit(mutations); });\n        }\n        this._observer = this._ngZone.runOutsideAngular(function () {\n            return _this._mutationObserverFactory.create(function (mutations) {\n                _this._debouncer.next(mutations);\n            });\n        });\n        if (this._observer) {\n            this._observer.observe(this._elementRef.nativeElement, {\n                characterData: true,\n                childList: true,\n                subtree: true\n            });\n        }\n    };\n    /**\n     * @return {?}\n     */\n    ObserveContent.prototype.ngOnDestroy = function () {\n        if (this._observer) {\n            this._observer.disconnect();\n        }\n        this._debouncer.complete();\n    };\n    ObserveContent.decorators = [\n        { type: Directive, args: [{\n                    selector: '[cdkObserveContent]',\n                    exportAs: 'cdkObserveContent',\n                },] },\n    ];\n    /**\n     * @nocollapse\n     */\n    ObserveContent.ctorParameters = function () { return [\n        { type: MatMutationObserverFactory, },\n        { type: ElementRef, },\n        { type: NgZone, },\n    ]; };\n    ObserveContent.propDecorators = {\n        'event': [{ type: Output, args: ['cdkObserveContent',] },],\n        'debounce': [{ type: Input },],\n    };\n    return ObserveContent;\n}());\nvar ObserversModule = (function () {\n    function ObserversModule() {\n    }\n    ObserversModule.decorators = [\n        { type: NgModule, args: [{\n                    exports: [ObserveContent],\n                    declarations: [ObserveContent],\n                    providers: [MatMutationObserverFactory]\n                },] },\n    ];\n    /**\n     * @nocollapse\n     */\n    ObserversModule.ctorParameters = function () { return []; };\n    return ObserversModule;\n}());\n\n/**\n * Generated bundle index. 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