45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
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import {ChangeDetector} from './interfaces';
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import {CHECK_ONCE, DETACHED, CHECK_ALWAYS} from './constants';
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/**
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* Controls change detection.
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*
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* [ChangeDetectorRef] allows requesting checks for detectors that rely on observables. It also allows detaching and
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* attaching change detector subtrees.
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*
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* @exportedAs angular2/change_detection
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*/
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export class ChangeDetectorRef {
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_cd:ChangeDetector;
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constructor(cd:ChangeDetector) {
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this._cd = cd;
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}
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/**
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* Request to check all ON_PUSH ancestors.
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*/
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requestCheck() {
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this._cd.markPathToRootAsCheckOnce();
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}
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/**
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* Detaches the change detector from the change detector tree.
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*
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* The detached change detector will not be checked until it is reattached.
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*/
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detach() {
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this._cd.mode = DETACHED;
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}
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/**
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* Reattach the change detector to the change detector tree.
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*
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* This also requests a check of this change detector. This reattached change detector will be checked during the
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* next change detection run.
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*/
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reattach() {
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this._cd.mode = CHECK_ALWAYS;
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this.requestCheck();
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}
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}
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