114 lines
2.1 KiB
JavaScript
114 lines
2.1 KiB
JavaScript
import {
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Transaction, Item, StructStore // eslint-disable-line
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} from '../internals.js'
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import * as encoding from 'lib0/encoding.js'
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import * as decoding from 'lib0/decoding.js'
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/**
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* @private
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*/
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export class ContentJSON {
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/**
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* @param {Array<any>} arr
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*/
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constructor (arr) {
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/**
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* @type {Array<any>}
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*/
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this.arr = arr
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}
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/**
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* @return {number}
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*/
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getLength () {
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return this.arr.length
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}
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/**
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* @return {Array<any>}
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*/
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getContent () {
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return this.arr
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}
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/**
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* @return {boolean}
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*/
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isCountable () {
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return true
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}
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/**
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* @return {ContentJSON}
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*/
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copy () {
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return new ContentJSON(this.arr)
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}
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/**
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* @param {number} offset
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* @return {ContentJSON}
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*/
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splice (offset) {
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const right = new ContentJSON(this.arr.slice(offset))
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this.arr = this.arr.slice(0, offset)
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return right
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}
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/**
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* @param {ContentJSON} right
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* @return {boolean}
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*/
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mergeWith (right) {
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this.arr = this.arr.concat(right.arr)
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return true
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}
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/**
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* @param {Transaction} transaction
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* @param {Item} item
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*/
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integrate (transaction, item) {}
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/**
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* @param {Transaction} transaction
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*/
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delete (transaction) {}
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/**
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* @param {StructStore} store
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*/
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gc (store) {}
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/**
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* @param {encoding.Encoder} encoder
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* @param {number} offset
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*/
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write (encoder, offset) {
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const len = this.arr.length
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encoding.writeVarUint(encoder, len - offset)
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for (let i = offset; i < len; i++) {
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const c = this.arr[i]
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encoding.writeVarString(encoder, c === undefined ? 'undefined' : JSON.stringify(c))
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}
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}
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/**
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* @return {number}
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*/
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getRef () {
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return 2
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}
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}
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/**
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* @private
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*
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* @param {decoding.Decoder} decoder
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* @return {ContentJSON}
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*/
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export const readContentJSON = decoder => {
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const len = decoding.readVarUint(decoder)
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const cs = []
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for (let i = 0; i < len; i++) {
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const c = decoding.readVarString(decoder)
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if (c === 'undefined') {
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cs.push(undefined)
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} else {
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cs.push(JSON.parse(c))
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}
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}
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return new ContentJSON(cs)
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}
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