96 lines
2.3 KiB
JavaScript
96 lines
2.3 KiB
JavaScript
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import {
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AbstractItem,
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AbstractItemRef,
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computeItemParams,
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GC,
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Transaction, StructStore, ID, AbstractType // 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 const structEmbedRefNumber = 3
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/**
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* @private
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*/
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export class ItemEmbed 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 {ID | null} origin
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* @param {AbstractItem | null} right
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* @param {ID | null} rightOrigin
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* @param {AbstractType<any>} parent
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* @param {string | null} parentSub
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* @param {Object} embed
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*/
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constructor (id, left, origin, right, rightOrigin, parent, parentSub, embed) {
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super(id, left, origin, right, rightOrigin, parent, parentSub)
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this.embed = embed
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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 {ID | null} origin
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* @param {AbstractItem | null} right
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* @param {ID | null} rightOrigin
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* @param {AbstractType<any>} parent
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* @param {string | null} parentSub
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*/
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copy (id, left, origin, right, rightOrigin, parent, parentSub) {
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return new ItemEmbed(id, left, origin, right, rightOrigin, parent, parentSub, this.embed)
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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, structEmbedRefNumber)
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encoding.writeVarString(encoder, JSON.stringify(this.embed))
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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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export class ItemEmbedRef 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 {Object}
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*/
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this.embed = JSON.parse(decoding.readVarString(decoder))
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}
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/**
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* @param {Transaction} transaction
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* @param {StructStore} store
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* @param {number} offset
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* @return {ItemEmbed|GC}
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*/
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toStruct (transaction, store, offset) {
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const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
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return parent === null
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? new GC(this.id, this.length)
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: new ItemEmbed(
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this.id,
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left,
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this.left,
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right,
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this.right,
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parent,
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parentSub,
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this.embed
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)
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}
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}
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