84 lines
2.0 KiB
JavaScript
84 lines
2.0 KiB
JavaScript
/**
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* @module structs
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*/
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import { Item, splitHelper } from './Item.js'
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import * as stringify from 'y-protocols/utils/structStringify.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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import { Y } from '../utils/Y.js' // eslint-disable-line
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export class ItemJSON extends Item {
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constructor () {
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super()
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this._content = null
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}
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_copy () {
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let struct = super._copy()
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struct._content = this._content
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return struct
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}
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get _length () {
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const c = this._content
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return c !== null ? c.length : 0
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}
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/**
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* @param {Y} y
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* @param {decoding.Decoder} decoder
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*/
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_fromBinary (y, decoder) {
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let missing = super._fromBinary(y, decoder)
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let len = decoding.readVarUint(decoder)
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this._content = new Array(len)
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for (let i = 0; i < len; i++) {
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const ctnt = decoding.readVarString(decoder)
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let parsed
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if (ctnt === 'undefined') {
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parsed = undefined
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} else {
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parsed = JSON.parse(ctnt)
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}
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this._content[i] = parsed
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}
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return missing
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}
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/**
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* @param {encoding.Encoder} encoder
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*/
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_toBinary (encoder) {
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super._toBinary(encoder)
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const len = this._length
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encoding.writeVarUint(encoder, len)
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for (let i = 0; i < len; i++) {
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let encoded
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const content = this._content[i]
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if (content === undefined) {
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encoded = 'undefined'
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} else {
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encoded = JSON.stringify(content)
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}
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encoding.writeVarString(encoder, encoded)
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}
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}
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/**
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* Transform this YXml Type to a readable format.
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* Useful for logging as all Items and Delete implement this method.
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*
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* @private
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*/
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_logString () {
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return stringify.logItemHelper('ItemJSON', this, `content:${JSON.stringify(this._content)}`)
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}
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_splitAt (y, diff) {
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if (diff === 0) {
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return this
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} else if (diff >= this._length) {
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return this._right
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}
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let item = new ItemJSON()
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item._content = this._content.splice(diff)
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splitHelper(y, this, item, diff)
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return item
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}
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}
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