81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
/**
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* @module structs
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*/
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// TODO: ItemBinary should be able to merge with right (similar to other items). Or the other items (ItemJSON) should not be able to merge - extra byte + consistency
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import { AbstractItem, AbstractItemRef } from './AbstractItem.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 { ID } from '../utils/ID.js' // eslint-disable-line
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import { getItemCleanEnd, getItemCleanStart, getItemType } from '../utils/StructStore.js'
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import { AbstractType } from '../types/AbstractType.js' // eslint-disable-line
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import { Transaction } from '../utils/Transaction.js' // eslint-disable-line
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export const structDeletedRefNumber = 2
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export class ItemDeleted extends AbstractItem {
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/**
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* @param {ID} id
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* @param {AbstractItem | null} left
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* @param {AbstractItem | null} right
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* @param {AbstractType} parent
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* @param {string | null} parentSub
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* @param {number} length
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*/
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constructor (id, left, right, parent, parentSub, length) {
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super(id, left, right, parent, parentSub)
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this.length = length
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}
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/**
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* @param {ID} id
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* @param {AbstractItem | null} left
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* @param {AbstractItem | null} right
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* @param {AbstractType} parent
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* @param {string | null} parentSub
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*/
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copy (id, left, right, parent, parentSub) {
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return new ItemDeleted(id, left, right, parent, parentSub, this.length)
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}
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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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super.write(encoder, offset, structDeletedRefNumber)
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encoding.writeVarUint(encoder, this.length - offset)
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}
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}
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export class ItemDeletedRef extends AbstractItemRef {
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/**
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* @param {decoding.Decoder} decoder
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* @param {ID} id
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* @param {number} info
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*/
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constructor (decoder, id, info) {
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super(decoder, id, info)
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/**
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* @type {number}
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*/
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this.length = decoding.readVarUint(decoder)
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}
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/**
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* @param {Transaction} transaction
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* @return {ItemDeleted}
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*/
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toStruct (transaction) {
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const y = transaction.y
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const store = y.store
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return new ItemDeleted(
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this.id,
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this.left === null ? null : getItemCleanEnd(store, transaction, this.left),
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this.right === null ? null : getItemCleanStart(store, transaction, this.right),
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// @ts-ignore
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this.parent === null ? y.get(this.parentYKey) : getItemType(store, this.parent).type,
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this.parentSub,
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this.length
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)
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}
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}
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