yonote/yjs
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fix first y-array test

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This commit is contained in:
Kevin Jahns
2017-10-16 04:53:12 +02:00
parent 4eec8ecdd3
commit 1311c7a0d8
28 changed files with 489 additions and 284 deletions
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229
src/Struct/Item.js
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@@ -1,3 +1,27 @@
import { getReference } from '../Util/structReferences.js'
import ID from '../Util/ID.js'
import { RootFakeUserID } from '../Util/RootID.js'
import Delete from './Delete.js'
/**
* Helper utility to split an Item (see _splitAt)
* - copy all properties from a to b
* - connect a to b
* - assigns the correct _id
* - save b to os
*/
export function splitHelper (y, a, b, diff) {
const aID = a._id
b._id = new ID(aID.user, aID.clock + diff)
b._origin = a
b._left = a
a._right = b
a._right_origin = b
b._parent = a._parent
b._parentSub = a._parentSub
b._deleted = a._deleted
y.os.put(b)
}
export default class Item {
constructor () {
@@ -13,22 +37,30 @@ export default class Item {
get _length () {
return 1
}
_getDistanceToOrigin () {
if (this.left == null) {
return 0
} else {
var d = 0
var o = this.left
while (o !== null && !this.origin.equals(o.id)) {
d++
o = o.left
}
return d
/**
* Splits this struct so that another struct can be inserted in-between.
* This must be overwritten if _length > 1
* Returns right part after split
* - diff === 0 => this
* - diff === length => this._right
* - otherwise => split _content and return right part of split
* (see ItemJSON/ItemString for implementation)
*/
_splitAt (y, diff) {
if (diff === 0) {
return this
}
return this._right
}
_delete (y) {
_delete (y, createDelete = true) {
this._deleted = true
y.ds.markDeleted(this._id, this._length)
if (createDelete) {
let del = new Delete()
del._targetID = this._id
del._length = this._length
del._integrate(y, true)
}
}
/*
* - Integrate the struct so that other types/structs can see it
@@ -36,8 +68,12 @@ export default class Item {
* - Check if this is struct deleted
*/
_integrate (y) {
if (this._id === null) {
const selfID = this._id
if (selfID === null) {
this._id = y.ss.getNextID(this._length)
} else if (selfID.clock < y.ss.getState(selfID.user)) {
// already applied..
return []
}
/*
# $this has to find a unique position between origin and the next known character
@@ -71,86 +107,145 @@ export default class Item {
// Note that conflictingItems is a subset of itemsBeforeOrigin
while (o !== null && o !== this._right) {
itemsBeforeOrigin.add(o)
if (this.origin === o.origin) {
if (this._origin === o._origin) {
// case 1
if (o._id.user < this._id.user) {
this.left = o
this._left = o
conflictingItems = new Set()
}
} else if (itemsBeforeOrigin.has(o)) {
// case 2
if (conflictingItems.has(o)) {
this.left = o
this._left = o
conflictingItems = new Set()
}
} else {
break
}
o = o.right
o = o._right
}
y.os.set(this)
y.ds.checkIfDeleted(this)
if (y.connector._forwardAppliedStructs || this._id.user === y.userID) {
y.connector.broadcastStruct(this)
if (this._left === null) {
if (this._parentSub !== null) {
this._parent._map.set(this._parentSub, this)
} else {
this._parent._start = this
}
}
if (y.persistence !== null) {
y.persistence.saveOperations(this)
y.os.put(this)
if (this._id.user !== RootFakeUserID) {
if (y.connector._forwardAppliedStructs || this._id.user === y.userID) {
y.connector.broadcastStruct(this)
}
if (y.persistence !== null) {
y.persistence.saveOperations(this)
}
y.ds.applyMissingDeletesOnStruct(this)
}
}
_toBinary (y, encoder) {
encoder.writeUint8(StructManager.getReference(this.constructor))
encoder.writeOpID(this._id)
encoder.writeOpID(this._parent._id)
encoder.writeVarString(this.parentSub === null ? '' : JSON.stringify(this.parentSub))
encoder.writeOpID(this._left === null ? null : this._left._id)
encoder.writeOpID(this._right_origin === null ? null : this._right_origin._id)
encoder.writeOpID(this._origin === null ? null : this._origin._id)
_toBinary (encoder) {
encoder.writeUint8(getReference(this.constructor))
let info = 0
if (this._origin !== null) {
info += 0b1 // origin is defined
}
if (this._left !== this._origin) {
info += 0b10 // do not copy origin to left
}
if (this._right_origin !== null) {
info += 0b100
}
if (this._parentSub !== null) {
info += 0b1000
}
encoder.writeUint8(info)
encoder.writeID(this._id)
if (info & 0b1) {
encoder.writeID(this._origin._id)
}
if (info & 0b10) {
encoder.writeID(this._left._id)
}
if (info & 0b100) {
encoder.writeID(this._right_origin._id)
}
if (~info & 0b101) {
// neither origin nor right is defined
encoder.writeID(this._parent._id)
}
if (info & 0b1000) {
encoder.writeVarString(JSON.stringify(this._parentSub))
}
}
_fromBinary (y, decoder) {
let missing = []
this._id = decoder.readOpID()
let parent = decoder.readOpID()
let parentSub = decoder.readVarString()
if (parentSub.length > 0) {
this._parentSub = JSON.parse(parentSub)
}
let left = decoder.readOpID()
let right = decoder.readOpId()
let origin = decoder.readOpID()
if (parent !== null && this._parent === null) {
let _parent = y.os.get(parent)
if (_parent === null) {
missing.push(parent)
} else {
this._parent = _parent
const info = decoder.readUint8()
this._id = decoder.readID()
// read origin
if (info & 0b1) {
// origin != null
const originID = decoder.readID()
if (this._origin === null) {
const origin = y.os.getItemCleanEnd(originID)
if (origin === null) {
missing.push(originID)
} else {
this._origin = origin
}
}
}
if (origin !== null && this._origin === null) {
let _origin = y.os.getCleanStart(origin)
if (_origin === null) {
missing.push(origin)
} else {
this._origin = _origin
// read left
if (info & 0b10) {
// left !== origin
const leftID = decoder.readID()
if (this._left === null) {
const left = y.os.getItemCleanEnd(leftID)
if (left === null) {
// use origin instead
this._left = this._origin
} else {
this._left = left
}
}
} else {
this._left = this._origin
}
// read right
if (info & 0b100) {
// right != null
const rightID = decoder.readID()
if (this._right_origin === null) {
const right = y.os.getCleanStart(rightID)
if (right === null) {
missing.push(right)
} else {
this._right = right
this._right_origin = right
}
}
}
if (left !== null && this._left === null) {
let _left = y.os.getCleanEnd(left)
if (_left === null) {
// use origin instead
this._left = this._origin
} else {
this._left = _left
// read parent
if (~info & 0b101) {
// neither origin nor right is defined
const parentID = decoder.readID()
if (this._parent === null) {
const parent = y.os.get(parentID)
if (parent === null) {
missing.push(parent)
} else {
this._parent = parent
}
}
} else if (this._parent === null) {
if (this._origin !== null) {
this._parent = this._origin._parent
} else if (this._right_origin !== null) {
this._parent = this._origin._parent
}
}
if (right !== null && this._right_origin === null) {
let _right = y.os.getCleanStart(right)
if (_right === null) {
missing.push(right)
} else {
this._right = _right
this._right_origin = _right
}
if (info & 0b1000) {
this._parentSub = decoder.readVarString()
}
return missing
}
_logString () {
return `left: ${this._left}, origin: ${this._origin}, right: ${this._right}, parent: ${this._parent}, parentSub: ${this._parentSub}`