42 lines
829 B
JavaScript
42 lines
829 B
JavaScript
/**
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* @module utils
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*/
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import { Type } from '../structs/Type.js' // eslint-disable-line
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/**
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* YEvent describes the changes on a YType.
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*/
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export class YEvent {
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/**
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* @param {Type} target The changed type.
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*/
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constructor (target) {
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/**
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* The type on which this event was created on.
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* @type {Type}
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*/
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this.target = target
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/**
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* The current target on which the observe callback is called.
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* @type {Type}
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*/
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this.currentTarget = target
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}
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/**
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* Computes the path from `y` to the changed type.
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*
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* The following property holds:
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* @example
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* let type = y
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* event.path.forEach(dir => {
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* type = type.get(dir)
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* })
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* type === event.target // => true
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*/
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get path () {
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return this.currentTarget.getPathTo(this.target)
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}
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}
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