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implemented xml type for new event system

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This commit is contained in:
Kevin Jahns
2017-10-19 17:36:28 +02:00
parent 1311c7a0d8
commit 755c9eb16e
38 changed files with 1272 additions and 322 deletions
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10
src/Connector.js
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@@ -5,7 +5,7 @@ import { sendSyncStep1, readSyncStep1 } from './MessageHandler/syncStep1.js'
import { readSyncStep2 } from './MessageHandler/syncStep2.js'
import { readUpdate } from './MessageHandler/update.js'
import { debug } from './Y.js'
import debug from 'debug'
export default class AbstractConnector {
constructor (y, opts) {
@@ -251,9 +251,13 @@ export default class AbstractConnector {
// cannot wait for sync step 1 to finish, because we may wait for sync step 2 in sync step 1 (->lock)
readSyncStep1(decoder, encoder, this.y, senderConn, sender)
} else if (messageType === 'sync step 2' && senderConn.auth === 'write') {
readSyncStep2(decoder, encoder, this.y, senderConn, sender)
this.y.transact(() => {
readSyncStep2(decoder, encoder, this.y, senderConn, sender)
})
} else if (messageType === 'update' && (skipAuth || senderConn.auth === 'write')) {
readUpdate(decoder, encoder, this.y, senderConn, sender)
this.y.transact(() => {
readUpdate(decoder, encoder, this.y, senderConn, sender)
})
} else {
throw new Error('Unable to receive message')
}

102
src/MessageHandler/deleteSet.js
View File

@@ -1,4 +1,5 @@
import { deleteItemRange } from '../Struct/Delete.js'
import ID from '../Util/ID.js'
export function stringifyDeleteSet (y, decoder, strBuilder) {
let dsLength = decoder.readUint32()
@@ -18,7 +19,7 @@ export function stringifyDeleteSet (y, decoder, strBuilder) {
export function writeDeleteSet (y, encoder) {
let currentUser = null
let currentLength = 0
let currentLength
let lastLenPos
let numberOfUsers = 0
@@ -36,14 +37,17 @@ export function writeDeleteSet (y, encoder) {
if (currentUser !== null) { // happens on first iteration
encoder.setUint32(lastLenPos, currentLength)
}
currentUser = user
encoder.writeVarUint(user)
// pseudo-fill pos
lastLenPos = encoder.pos
encoder.writeUint32(0)
currentLength = 0
}
encoder.writeVarUint(clock)
encoder.writeVarUint(len)
encoder.writeUint8(gc ? 1 : 0)
currentLength++
})
if (currentUser !== null) { // happens on first iteration
encoder.setUint32(lastLenPos, currentLength)
@@ -56,62 +60,64 @@ export function readDeleteSet (y, decoder) {
for (let i = 0; i < dsLength; i++) {
let user = decoder.readVarUint()
let dv = []
let dvLength = decoder.readVarUint()
let dvLength = decoder.readUint32()
for (let j = 0; j < dvLength; j++) {
let from = decoder.readVarUint()
let len = decoder.readVarUint()
let gc = decoder.readUint8() === 1
dv.push([from, len, gc])
}
var pos = 0
var d = dv[pos]
y.ds.iterate([user, 0], [user, Number.MAX_VALUE], function (n) {
// cases:
// 1. d deletes something to the right of n
// => go to next n (break)
// 2. d deletes something to the left of n
// => create deletions
// => reset d accordingly
// *)=> if d doesn't delete anything anymore, go to next d (continue)
// 3. not 2) and d deletes something that also n deletes
// => reset d so that it doesn't contain n's deletion
// *)=> if d does not delete anything anymore, go to next d (continue)
while (d != null) {
var diff = 0 // describe the diff of length in 1) and 2)
if (n.id[1] + n.len <= d[0]) {
// 1)
break
} else if (d[0] < n.id[1]) {
// 2)
// delete maximum the len of d
// else delete as much as possible
diff = Math.min(n.id[1] - d[0], d[1])
deleteItemRange(y, user, d[0], diff)
// deletions.push([user, d[0], diff, d[2]])
} else {
// 3)
diff = n.id[1] + n.len - d[0] // never null (see 1)
if (d[2] && !n.gc) {
// d marks as gc'd but n does not
// then delete either way
deleteItemRange(y, user, d[0], Math.min(diff, d[1]))
// deletions.push([user, d[0], Math.min(diff, d[1]), d[2]])
if (dvLength > 0) {
let pos = 0
let d = dv[pos]
y.ds.iterate(new ID(user, 0), new ID(user, Number.MAX_VALUE), function (n) {
// cases:
// 1. d deletes something to the right of n
// => go to next n (break)
// 2. d deletes something to the left of n
// => create deletions
// => reset d accordingly
// *)=> if d doesn't delete anything anymore, go to next d (continue)
// 3. not 2) and d deletes something that also n deletes
// => reset d so that it doesn't contain n's deletion
// *)=> if d does not delete anything anymore, go to next d (continue)
while (d != null) {
var diff = 0 // describe the diff of length in 1) and 2)
if (n._id.clock + n.len <= d[0]) {
// 1)
break
} else if (d[0] < n._id.clock) {
// 2)
// delete maximum the len of d
// else delete as much as possible
diff = Math.min(n._id.clock - d[0], d[1])
deleteItemRange(y, user, d[0], diff)
// deletions.push([user, d[0], diff, d[2]])
} else {
// 3)
diff = n._id.clock + n.len - d[0] // never null (see 1)
if (d[2] && !n.gc) {
// d marks as gc'd but n does not
// then delete either way
deleteItemRange(y, user, d[0], Math.min(diff, d[1]))
// deletions.push([user, d[0], Math.min(diff, d[1]), d[2]])
}
}
if (d[1] <= diff) {
// d doesn't delete anything anymore
d = dv[++pos]
} else {
d[0] = d[0] + diff // reset pos
d[1] = d[1] - diff // reset length
}
}
if (d[1] <= diff) {
// d doesn't delete anything anymore
d = dv[++pos]
} else {
d[0] = d[0] + diff // reset pos
d[1] = d[1] - diff // reset length
}
})
// for the rest.. just apply it
for (; pos < dv.length; pos++) {
d = dv[pos]
deleteItemRange(y, user, d[0], d[1])
// deletions.push([user, d[0], d[1], d[2]])
}
})
// for the rest.. just apply it
for (; pos < dv.length; pos++) {
d = dv[pos]
deleteItemRange(y, user, d[0], d[1])
// deletions.push([user, d[0], d[1], d[2]])
}
}
}

37
src/MessageHandler/integrateRemoteStructs.js
View File

@@ -1,5 +1,6 @@
import { getStruct } from '../Util/structReferences.js'
import BinaryDecoder from '../Binary/Decoder.js'
import Delete from '../Struct/Delete.js'
class MissingEntry {
constructor (decoder, missing, struct) {
@@ -16,24 +17,26 @@ class MissingEntry {
*/
function _integrateRemoteStructHelper (y, struct) {
struct._integrate(y)
let msu = y._missingStructs.get(struct._id.user)
if (msu != null) {
let len = struct._length
for (let i = 0; i < len; i++) {
if (msu.has(struct._id.clock + i)) {
let msuc = msu.get(struct._id.clock + i)
msuc.forEach(missingDef => {
missingDef.missing--
if (missingDef.missing === 0) {
let missing = missingDef.struct._fromBinary(y, missingDef.decoder)
if (missing.length > 0) {
console.error('Missing should be empty!')
} else {
y._readyToIntegrate.push(missingDef.struct)
if (!(struct instanceof Delete)) {
let msu = y._missingStructs.get(struct._id.user)
if (msu != null) {
let len = struct._length
for (let i = 0; i < len; i++) {
if (msu.has(struct._id.clock + i)) {
let msuc = msu.get(struct._id.clock + i)
msuc.forEach(missingDef => {
missingDef.missing--
if (missingDef.missing === 0) {
let missing = missingDef.struct._fromBinary(y, missingDef.decoder)
if (missing.length > 0) {
console.error('Missing should be empty!')
} else {
y._readyToIntegrate.push(missingDef.struct)
}
}
}
})
msu.delete(struct._id.clock)
})
msu.delete(struct._id.clock)
}
}
}
}

8
src/MessageHandler/messageToString.js
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@@ -3,18 +3,18 @@ import { stringifyUpdate } from './update.js'
import { stringifySyncStep1 } from './syncStep1.js'
import { stringifySyncStep2 } from './syncStep2.js'
export function messageToString (buffer) {
export function messageToString (y, buffer) {
let decoder = new BinaryDecoder(buffer)
decoder.readVarString() // read roomname
let type = decoder.readVarString()
let strBuilder = []
strBuilder.push('\n === ' + type + ' ===\n')
if (type === 'update') {
stringifyUpdate(decoder, strBuilder)
stringifyUpdate(y, decoder, strBuilder)
} else if (type === 'sync step 1') {
stringifySyncStep1(decoder, strBuilder)
stringifySyncStep1(y, decoder, strBuilder)
} else if (type === 'sync step 2') {
stringifySyncStep2(decoder, strBuilder)
stringifySyncStep2(y, decoder, strBuilder)
} else {
strBuilder.push('-- Unknown message type - probably an encoding issue!!!')
}

14
src/MessageHandler/syncStep1.js
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@@ -2,8 +2,9 @@ import BinaryEncoder from '../Binary/Encoder.js'
import { readStateSet, writeStateSet } from './stateSet.js'
import { writeDeleteSet } from './deleteSet.js'
import ID from '../Util/ID.js'
import { RootFakeUserID } from '../Util/RootID.js'
export function stringifySyncStep1 (decoder, strBuilder) {
export function stringifySyncStep1 (y, decoder, strBuilder) {
let auth = decoder.readVarString()
let protocolVersion = decoder.readVarUint()
strBuilder.push(`
@@ -31,10 +32,13 @@ export function sendSyncStep1 (connector, syncUser) {
}
export default function writeStructs (encoder, decoder, y, ss) {
for (let [user, clock] of ss) {
y.os.iterate(new ID(user, clock), null, function (struct) {
struct._toBinary(encoder)
})
for (let user of y.ss.state.keys()) {
let clock = ss.get(user) || 0
if (user !== RootFakeUserID) {
y.os.iterate(new ID(user, clock), new ID(user, Number.MAX_VALUE), function (struct) {
struct._toBinary(encoder)
})
}
}
}

4
src/MessageHandler/syncStep2.js
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@@ -2,10 +2,10 @@ import { integrateRemoteStructs } from './integrateRemoteStructs.js'
import { stringifyUpdate } from './update.js'
import { readDeleteSet } from './deleteSet.js'
export function stringifySyncStep2 (decoder, strBuilder) {
export function stringifySyncStep2 (y, decoder, strBuilder) {
strBuilder.push(' - auth: ' + decoder.readVarString() + '\n')
strBuilder.push(' == OS: \n')
stringifyUpdate(decoder, strBuilder)
stringifyUpdate(y, decoder, strBuilder)
// write DS to string
strBuilder.push(' == DS: \n')
let len = decoder.readUint32()

4
src/MessageHandler/update.js
View File

@@ -1,12 +1,12 @@
import { getStruct } from '../Util/structReferences.js'
export function stringifyUpdate (decoder, strBuilder) {
export function stringifyUpdate (y, decoder, strBuilder) {
while (decoder.length !== decoder.pos) {
let reference = decoder.readVarUint()
let Constr = getStruct(reference)
let struct = new Constr()
let missing = struct._fromBinary(decoder)
let missing = struct._fromBinary(y, decoder)
let logMessage = struct._logString()
if (missing.length > 0) {
logMessage += missing.map(m => m._logString()).join(', ')

47
src/Store/DeleteStore.js
View File

@@ -3,25 +3,26 @@ import ID from '../Util/ID.js'
class DSNode {
constructor (id, len, gc) {
this.id = id
this._id = id
this.len = len
this.gc = gc
}
clone () {
return new DSNode(this.id, this.len, this.gc)
return new DSNode(this._id, this.len, this.gc)
}
}
export default class DeleteStore extends Tree {
isDeleted (id) {
var n = this.ds.findWithUpperBound(id)
return n != null && n.id[0] === id[0] && id[1] < n.id[1] + n.len
var n = this.findWithUpperBound(id)
return n !== null && n._id.user === id.user && id.clock < n._id.clock + n.len
}
// TODO: put this in function (and all other methods)
applyMissingDeletesOnStruct (struct) {
const strID = struct._id
// find most right delete
let n = this.findWithUpperBound(new ID(strID.user, strID.clock + struct.length - 1))
if (n === null || n.id.user !== strID.user || n.id.clock + n.length <= strID.clock) {
let n = this.findWithUpperBound(new ID(strID.user, strID.clock + struct._length - 1))
if (n === null || n._id.user !== strID.user || n._id.clock + n.len <= strID.clock) {
// struct is not deleted
return null
}
@@ -37,22 +38,22 @@ export default class DeleteStore extends Tree {
throw new Error('length must be defined')
}
var n = this.findWithUpperBound(id)
if (n != null && n.id.user === id.user) {
if (n.id.clock <= id.clock && id.clock <= n.id.clock + n.len) {
if (n != null && n._id.user === id.user) {
if (n._id.clock <= id.clock && id.clock <= n._id.clock + n.len) {
// id is in n's range
var diff = id.clock + length - (n.id.clock + n.len) // overlapping right
var diff = id.clock + length - (n._id.clock + n.len) // overlapping right
if (diff > 0) {
// id+length overlaps n
if (!n.gc) {
n.len += diff
} else {
diff = n.id.clock + n.len - id.clock // overlapping left (id till n.end)
diff = n._id.clock + n.len - id.clock // overlapping left (id till n.end)
if (diff < length) {
// a partial deletion
let nId = id.clone()
nId.clock += diff
n = new DSNode(nId, length - diff, false)
this.ds.put(n)
this.put(n)
} else {
// already gc'd
throw new Error(
@@ -67,21 +68,21 @@ export default class DeleteStore extends Tree {
} else {
// cannot extend left (there is no left!)
n = new DSNode(id, length, false)
this.ds.put(n) // TODO: you double-put !!
this.put(n) // TODO: you double-put !!
}
} else {
// cannot extend left
n = new DSNode(id, length, false)
this.ds.put(n)
this.put(n)
}
// can extend right?
var next = this.ds.findNext(n.id)
var next = this.findNext(n._id)
if (
next != null &&
n.id.user === next.id.user &&
n.id.clock + n.len >= next.id.clock
n._id.user === next._id.user &&
n._id.clock + n.len >= next._id.clock
) {
diff = n.id.clock + n.len - next.id.clock // from next.start to n.end
diff = n._id.clock + n.len - next._id.clock // from next.start to n.end
while (diff >= 0) {
// n overlaps with next
if (next.gc) {
@@ -92,7 +93,7 @@ export default class DeleteStore extends Tree {
diff = diff - next.len // missing range after next
if (diff > 0) {
this.put(n) // unneccessary? TODO!
this.markDeleted(new ID(next.id.user, next.id.clock + next.len), diff)
this.markDeleted(new ID(next._id.user, next._id.clock + next.len), diff)
}
}
break
@@ -101,19 +102,19 @@ export default class DeleteStore extends Tree {
if (diff > next.len) {
// n is even longer than next
// get next.next, and try to extend it
var _next = this.findNext(next.id)
this.delete(next.id)
if (_next == null || n.id.user !== _next.id.user) {
var _next = this.findNext(next._id)
this.delete(next._id)
if (_next == null || n._id.user !== _next._id.user) {
break
} else {
next = _next
diff = n.id.clock + n.len - next.id.clock // from next.start to n.end
diff = n._id.clock + n.len - next._id.clock // from next.start to n.end
// continue!
}
} else {
// n just partially overlaps with next. extend n, delete next, and break this loop
n.len += next.len - diff
this.delete(next.id)
this.delete(next._id)
break
}
}

8
src/Store/OperationStore.js
View File

@@ -1,5 +1,5 @@
import Tree from '../Util/Tree.js'
import RootID from '../Util/ID.js'
import RootID from '../Util/RootID.js'
import { getStruct } from '../Util/structReferences.js'
export default class OperationStore extends Tree {
@@ -10,10 +10,12 @@ export default class OperationStore extends Tree {
get (id) {
let struct = this.find(id)
if (struct === null && id instanceof RootID) {
let Constr = getStruct(id.type)
const Constr = getStruct(id.type)
const y = this.y
struct = new Constr()
struct._id = id
struct._parent = this.y
struct._parent = y
struct._integrate(y)
this.put(struct)
}
return struct

12
src/Store/StateStore.js
View File

@@ -4,12 +4,12 @@ export default class StateStore {
constructor (y) {
this.y = y
this.state = new Map()
this.currentClock = 0
}
getNextID (len) {
let id = new ID(this.y.userID, this.currentClock)
this.currentClock += len
return id
const user = this.y.userID
const state = this.getState(user)
this.setState(user, state + len)
return new ID(user, state)
}
updateRemoteState (struct) {
let user = struct._id.user
@@ -27,4 +27,8 @@ export default class StateStore {
}
return state
}
setState (user, state) {
// TODO: modify missingi structs here
this.state.set(user, state)
}
}

33
src/Struct/Delete.js
View File

@@ -1,9 +1,35 @@
import { getReference } from '../Util/structReferences.js'
import ID from '../Util/ID.js'
/**
* Delete all items in an ID-range
* TODO: implement getItemCleanStartNode for better performance (only one lookup)
*/
export function deleteItemRange (y, user, clock, range) {
let items = y.os.getItems(this._target, this._length)
for (let i = items.length - 1; i >= 0; i--) {
items[i]._delete(y, false)
const createDelete = y.connector._forwardAppliedStructs
let item = y.os.getItemCleanStart(new ID(user, clock))
if (item !== null) {
if (!item._deleted) {
item._splitAt(y, range)
item._delete(y, createDelete)
}
let itemLen = item._length
range -= itemLen
clock += itemLen
if (range > 0) {
let node = y.os.findNode(new ID(user, clock))
while (node !== null && range > 0 && node.val._id.equals(new ID(user, clock))) {
const nodeVal = node.val
if (!nodeVal._deleted) {
nodeVal._splitAt(y, range)
nodeVal._delete(y, createDelete)
}
const nodeLen = nodeVal._length
range -= nodeLen
clock += nodeLen
node = node.next()
}
}
}
}
@@ -18,6 +44,7 @@ export default class Delete {
_fromBinary (y, decoder) {
this._targetID = decoder.readID()
this._length = decoder.readVarUint()
return []
}
_toBinary (encoder) {
encoder.writeUint8(getReference(this.constructor))

81
src/Struct/Item.js
View File

@@ -34,6 +34,9 @@ export default class Item {
this._parentSub = null
this._deleted = false
}
get _lastId () {
return new ID(this._id.user, this._id.clock + this._length - 1)
}
get _length () {
return 1
}
@@ -61,6 +64,17 @@ export default class Item {
del._length = this._length
del._integrate(y, true)
}
const parent = this._parent
if (parent !== y && !parent._deleted) {
y._transactionChangedTypes.set(parent, this._parentSub)
}
}
/**
* This is called right before this struct receives any children.
* It can be overwritten to apply pending changes before applying remote changes
*/
_beforeChange () {
// nop
}
/*
* - Integrate the struct so that other types/structs can see it
@@ -68,12 +82,26 @@ export default class Item {
* - Check if this is struct deleted
*/
_integrate (y) {
const parent = this._parent
const selfID = this._id
const userState = selfID === null ? 0 : y.ss.getState(selfID.user)
if (selfID === null) {
this._id = y.ss.getNextID(this._length)
} else if (selfID.clock < y.ss.getState(selfID.user)) {
} else if (selfID.user === RootFakeUserID) {
// nop
} else if (selfID.clock < userState) {
// already applied..
return []
} else if (selfID.clock === userState) {
y.ss.setState(selfID.user, userState + this._length)
} else {
// missing content from user
throw new Error('Can not apply yet!')
}
if (!parent._deleted && !y._transactionChangedTypes.has(parent) && !y._transactionNewTypes.has(parent)) {
// this is the first time parent is updated
// or this types is new
this._parent._beforeChange()
}
/*
# $this has to find a unique position between origin and the next known character
@@ -96,7 +124,7 @@ export default class Item {
if (this._left !== null) {
o = this._left._right
} else if (this._parentSub !== null) {
o = this._parent._map.get(this._parentSub)
o = this._parent._map.get(this._parentSub) || null
} else {
o = this._parent._start
}
@@ -124,14 +152,36 @@ export default class Item {
}
o = o._right
}
// reconnect left/right + update parent map/start if necessary
const parentSub = this._parentSub
if (this._left === null) {
if (this._parentSub !== null) {
this._parent._map.set(this._parentSub, this)
let right
if (parentSub !== null) {
const pmap = parent._map
right = pmap.get(parentSub) || null
pmap.set(parentSub, this)
} else {
this._parent._start = this
right = parent._start
parent._start = this
}
this._right = right
if (right !== null) {
right._left = this
}
} else {
const left = this._left
const right = left._right
this._right = right
left._right = this
if (right !== null) {
right._left = this
}
}
y.os.put(this)
if (parent !== y && !parent._deleted) {
y._transactionChangedTypes.set(parent, parentSub)
}
if (this._id.user !== RootFakeUserID) {
if (y.connector._forwardAppliedStructs || this._id.user === y.userID) {
y.connector.broadcastStruct(this)
@@ -160,10 +210,10 @@ export default class Item {
encoder.writeUint8(info)
encoder.writeID(this._id)
if (info & 0b1) {
encoder.writeID(this._origin._id)
encoder.writeID(this._origin._lastId)
}
if (info & 0b10) {
encoder.writeID(this._left._id)
encoder.writeID(this._left._lastId)
}
if (info & 0b100) {
encoder.writeID(this._right_origin._id)
@@ -179,7 +229,8 @@ export default class Item {
_fromBinary (y, decoder) {
let missing = []
const info = decoder.readUint8()
this._id = decoder.readID()
const id = decoder.readID()
this._id = id
// read origin
if (info & 0b1) {
// origin != null
@@ -214,9 +265,9 @@ export default class Item {
// right != null
const rightID = decoder.readID()
if (this._right_origin === null) {
const right = y.os.getCleanStart(rightID)
const right = y.os.getItemCleanStart(rightID)
if (right === null) {
missing.push(right)
missing.push(rightID)
} else {
this._right = right
this._right_origin = right
@@ -230,7 +281,7 @@ export default class Item {
if (this._parent === null) {
const parent = y.os.get(parentID)
if (parent === null) {
missing.push(parent)
missing.push(parentID)
} else {
this._parent = parent
}
@@ -239,11 +290,15 @@ export default class Item {
if (this._origin !== null) {
this._parent = this._origin._parent
} else if (this._right_origin !== null) {
this._parent = this._origin._parent
this._parent = this._right_origin._parent
}
}
if (info & 0b1000) {
this._parentSub = decoder.readVarString()
// TODO: maybe put this in read parent condition (you can also read parentsub from left/right)
this._parentSub = JSON.parse(decoder.readVarString())
}
if (y.ss.getState(id.user) < id.clock) {
missing.push(new ID(id.user, id.clock - 1))
}
return missing
}

3
src/Struct/ItemJSON.js
View File

@@ -13,7 +13,8 @@ export default class ItemJSON extends Item {
let len = decoder.readVarUint()
this._content = new Array(len)
for (let i = 0; i < len; i++) {
this._content[i] = JSON.parse(decoder.readVarString())
const ctnt = decoder.readVarString()
this._content[i] = JSON.parse(ctnt)
}
return missing
}

44
src/Struct/Type.js
View File

@@ -1,4 +1,18 @@
import Item from './Item.js'
import EventHandler from '../Util/EventHandler.js'
// restructure children as if they were inserted one after another
function integrateChildren (y, start) {
let right
do {
right = start._right
start._right = null
start._right_origin = null
start._origin = start._left
start._integrate(y)
start = right
} while (right !== null)
}
export default class Type extends Item {
constructor () {
@@ -6,24 +20,46 @@ export default class Type extends Item {
this._map = new Map()
this._start = null
this._y = null
this._eventHandler = new EventHandler()
}
observe (f) {
this._eventHandler.addEventListener(f)
}
unobserve (f) {
this._eventHandler.removeEventListener(f)
}
_integrate (y) {
y._transactionNewTypes.add(this)
super._integrate(y)
this._y = y
// when integrating children we must make sure to
// integrate start
const start = this._start
if (start !== null) {
this._start = null
integrateChildren(y, start)
}
// integrate map children
const map = this._map
for (let [key, t] of map) {
map.delete(key)
integrateChildren(y, t)
}
}
_delete (y) {
super._delete(y)
_delete (y, createDelete) {
super._delete(y, createDelete)
y._transactionChangedTypes.delete(this)
// delete map types
for (let value of this._map.values()) {
if (value instanceof Item && !value._deleted) {
value._delete()
value._delete(y, false)
}
}
// delete array types
let t = this._start
while (t !== null) {
if (!t._deleted) {
t._delete()
t._delete(y, false)
}
t = t._right
}

171
src/Type/YArray.js
View File

@@ -2,6 +2,16 @@ import Type from '../Struct/Type.js'
import ItemJSON from '../Struct/ItemJSON.js'
export default class YArray extends Type {
_callObserver () {
this._eventHandler.callEventListeners({})
}
get (i) {
// TODO: This can be improved!
return this.toArray()[i]
}
toArray () {
return this.map(c => c)
}
toJSON () {
return this.map(c => {
if (c instanceof Type) {
@@ -11,6 +21,7 @@ export default class YArray extends Type {
return c.toString()
}
}
return c
})
}
map (f) {
@@ -25,11 +36,15 @@ export default class YArray extends Type {
let n = this._start
while (n !== null) {
if (!n._deleted) {
const content = n._content
const contentLen = content.length
for (let i = 0; i < contentLen; i++) {
pos++
f(content[i], pos, this)
if (n instanceof Type) {
f(n, pos++, this)
} else {
const content = n._content
const contentLen = content.length
for (let i = 0; i < contentLen; i++) {
pos++
f(content[i], pos, this)
}
}
}
n = n._right
@@ -42,14 +57,14 @@ export default class YArray extends Type {
if (!n._deleted) {
length += n._length
}
n = n._next
n = n._right
}
return length
}
[Symbol.iterator] () {
return {
next: function () {
while (this._item !== null && (this._item._deleted || this._item._content.length <= this._itemElement)) {
while (this._item !== null && (this._item._deleted || this._item._length <= this._itemElement)) {
// item is deleted or itemElement does not exist (is deleted)
this._item = this._item._right
this._itemElement = 0
@@ -58,11 +73,16 @@ export default class YArray extends Type {
return {
done: true
}
}
let content
if (this._item instanceof Type) {
content = this._item
} else {
return {
value: [this._count, this._item._content[this._itemElement++]],
done: false
}
content = this._item._content[this._itemElement++]
}
return {
value: [this._count, content],
done: false
}
},
_item: this._start,
@@ -71,68 +91,99 @@ export default class YArray extends Type {
}
}
delete (pos, length = 1) {
let item = this._start
let count = 0
while (item !== null && length > 0) {
if (count < pos && pos < count + item._length) {
const diffDel = pos - count
item = item
._splitAt(this._y, diffDel)
._splitAt(this._y, length)
length -= item._length
item._delete(this._y)
this._y.transact(() => {
let item = this._start
let count = 0
while (item !== null && length > 0) {
if (count <= pos && pos < count + item._length) {
const diffDel = pos - count
item = item._splitAt(this._y, diffDel)
item._splitAt(this._y, length)
length -= item._length
item._delete(this._y)
}
if (!item._deleted) {
count += item._length
}
item = item._right
}
if (!item._deleted) {
count += item._length
if (length > 0) {
throw new Error('Delete exceeds the range of the YArray')
}
})
}
insertAfter (left, content) {
const apply = () => {
let right
if (left === null) {
right = this._start
} else {
right = left._right
}
let prevJsonIns = null
for (let i = 0; i < content.length; i++) {
let c = content[i]
if (c instanceof Type) {
if (prevJsonIns !== null) {
if (this._y !== null) {
prevJsonIns._integrate(this._y)
}
left = prevJsonIns
prevJsonIns = null
}
c._origin = left
c._left = left
c._right = right
c._right_origin = right
c._parent = this
if (this._y !== null) {
c._integrate(this._y)
} else if (left === null) {
this._start = c
}
left = c
} else {
if (prevJsonIns === null) {
prevJsonIns = new ItemJSON()
prevJsonIns._origin = left
prevJsonIns._left = left
prevJsonIns._right = right
prevJsonIns._right_origin = right
prevJsonIns._parent = this
prevJsonIns._content = []
}
prevJsonIns._content.push(c)
}
}
if (prevJsonIns !== null && this._y !== null) {
prevJsonIns._integrate(this._y)
}
item = item._right
}
if (length > 0) {
throw new Error('Delete exceeds the range of the YArray')
if (this._y !== null) {
this._y.transact(apply)
} else {
apply()
}
return content
}
insert (pos, content) {
let left = this._start
let right = null
let left = null
let right = this._start
let count = 0
while (left !== null) {
if (count <= pos && pos < count + left._content.length) {
right = left._splitAt(this.y, pos - count)
while (right !== null) {
if (count <= pos && pos < count + right._length) {
right = right._splitAt(this._y, pos - count)
left = right._left
break
}
count += left._length
left = left.right
count += right._length
left = right
right = right._right
}
if (pos > count) {
throw new Error('Position exceeds array range!')
}
let prevJsonIns = null
for (let i = 0; i < content.length; i++) {
let c = content[i]
if (c instanceof Type) {
if (prevJsonIns === null) {
prevJsonIns._integrate(this._y)
prevJsonIns = null
}
c._left = left
c._origin = left
c._right = right
c._parent = this
} else {
if (prevJsonIns === null) {
prevJsonIns = new ItemJSON()
prevJsonIns._origin = left
prevJsonIns._left = left
prevJsonIns._right = right
prevJsonIns._parent = this
prevJsonIns._content = []
}
prevJsonIns._content.push(c)
}
}
if (prevJsonIns !== null) {
prevJsonIns._integrate(this._y)
}
this.insertAfter(left, content)
}
_logString () {
let s = super._logString()

47
src/Type/YMap.js
View File

@@ -3,6 +3,11 @@ import Item from '../Struct/Item.js'
import ItemJSON from '../Struct/ItemJSON.js'
export default class YMap extends Type {
_callObserver (parentSub) {
this._eventHandler.callEventListeners({
name: parentSub
})
}
toJSON () {
const map = {}
for (let [key, item] of this._map) {
@@ -22,22 +27,40 @@ export default class YMap extends Type {
}
return map
}
delete (key) {
this._y.transact(() => {
let c = this._map.get(key)
if (c !== undefined) {
c._delete(this._y)
}
})
}
set (key, value) {
let old = this._map.get(key)
let v
if (value instanceof Item) {
v = value
} else {
let v = new ItemJSON()
v._content = JSON.stringify(value)
}
v._right = old
v._parent = this
v._parentSub = key
v._integrate()
this._y.transact(() => {
const old = this._map.get(key) || null
if (old !== null) {
old._delete(this._y)
}
let v
if (value instanceof Item) {
v = value
} else {
v = new ItemJSON()
v._content = [value]
}
v._right = old
v._right_origin = old
v._parent = this
v._parentSub = key
v._integrate(this._y)
})
return value
}
get (key) {
let v = this._map.get(key)
if (v === undefined || v._deleted) {
return undefined
}
if (v instanceof Type) {
return v
} else {

49
src/Type/YText.js
View File

@@ -1,4 +1,53 @@
import ItemString from '../Struct/ItemString.js'
import YArray from './YArray.js'
export default class YText extends YArray {
constructor (string) {
super()
if (typeof string === 'string') {
const start = new ItemString()
start._parent = this
start._content = string
this._start = start
}
}
toString () {
const strBuilder = []
let n = this._start
while (n !== null) {
if (!n._deleted) {
strBuilder.push(n._content)
}
n = n._right
}
return strBuilder.join('')
}
insert (pos, text) {
this._y.transact(() => {
let left = null
let right = this._start
let count = 0
while (right !== null) {
if (count <= pos && pos < count + right._length) {
right = right._splitAt(this._y, pos - count)
left = right._left
break
}
count += right._length
left = right
right = right._right
}
if (pos > count) {
throw new Error('Position exceeds array range!')
}
let item = new ItemString()
item._origin = left
item._left = left
item._right = right
item._right_origin = right
item._parent = this
item._content = text
item._integrate(this._y)
})
}
}

10
src/Type/YXml.js
View File

@@ -1,10 +0,0 @@
import YArray from './YArray.js'
export default class YXml extends YArray {
setDomFilter () {
// TODO
}
toString () {
return '<nodeName></nodeName>'
}
}

117
src/Type/y-xml/YXmlElement.js Normal file
View File

@@ -0,0 +1,117 @@
/* global MutationObserver */
// import diff from 'fast-diff'
import { defaultDomFilter } from './utils.js'
import YMap from '../YMap.js'
import YXmlFragment from './YXmlFragment.js'
export default class YXmlElement extends YXmlFragment {
constructor (arg1, arg2) {
super()
this.nodeName = null
this._scrollElement = null
if (typeof arg1 === 'string') {
this.nodeName = arg1.toUpperCase()
} else if (arg1 != null && arg1.nodeType != null && arg1.nodeType === document.ELEMENT_NODE) {
this.nodeName = arg1.nodeName
this._setDom(arg1)
} else {
this.nodeName = 'UNDEFINED'
}
if (typeof arg2 === 'function') {
this._domFilter = arg2
}
}
_setDom (dom) {
if (this._dom != null) {
throw new Error('Only call this method if you know what you are doing ;)')
} else if (dom.__yxml != null) { // TODO do i need to check this? - no.. but for dev purps..
throw new Error('Already bound to an YXml type')
} else {
dom.__yxml = this
// tag is already set in constructor
// set attributes
let attrNames = []
for (let i = 0; i < dom.attributes.length; i++) {
attrNames.push(dom.attributes[i].name)
}
attrNames = this._domFilter(dom, attrNames)
for (let i = 0; i < attrNames.length; i++) {
let attrName = attrNames[i]
let attrValue = dom.getAttribute(attrName)
this.setAttribute(attrName, attrValue)
}
this.insertDomElements(0, Array.prototype.slice.call(dom.childNodes))
if (MutationObserver != null) {
this._dom = this._bindToDom(dom)
}
return dom
}
}
_fromBinary (y, decoder) {
const missing = super._fromBinary(y, decoder)
this.nodeName = decoder.readVarString()
return missing
}
_toBinary (encoder) {
super._toBinary(encoder)
encoder.writeVarString(this.nodeName)
}
_integrate (y) {
if (this.nodeName === null) {
throw new Error('nodeName must be defined!')
}
if (this._domFilter === defaultDomFilter && this._parent instanceof YXmlFragment) {
this._domFilter = this._parent._domFilter
}
super._integrate(y)
}
toString () {
const attrs = this.getAttributes()
const stringBuilder = []
for (let key in attrs) {
stringBuilder.push(key + '="' + attrs[key] + '"')
}
const nodeName = this.nodeName.toLocaleLowerCase()
const attrsString = stringBuilder.length > 0 ? ' ' + stringBuilder.join(' ') : ''
return `<${nodeName}${attrsString}>${super.toString()}</${nodeName}>`
}
removeAttribute () {
return YMap.prototype.delete.apply(this, arguments)
}
setAttribute () {
return YMap.prototype.set.apply(this, arguments)
}
getAttribute () {
return YMap.prototype.get.apply(this, arguments)
}
getAttributes () {
const obj = {}
for (let [key, value] of this._map) {
obj[key] = value._content[0]
}
return obj
}
getDom () {
let dom = this._dom
if (dom == null) {
dom = document.createElement(this.nodeName)
dom.__yxml = this
let attrs = this.getAttributes()
for (let key in attrs) {
dom.setAttribute(key, attrs[key])
}
this.forEach(yxml => {
dom.appendChild(yxml.getDom())
})
if (MutationObserver !== null) {
this._dom = this._bindToDom(dom)
}
}
return dom
}
}

167
src/Type/y-xml/YXmlFragment.js Normal file
View File

@@ -0,0 +1,167 @@
/* global MutationObserver */
import { defaultDomFilter, applyChangesFromDom, reflectChangesOnDom } from './utils.js'
import YArray from '../YArray.js'
import YXmlText from './YXmlText.js'
function domToYXml (parent, doms) {
const types = []
doms.forEach(d => {
if (d.__yxml != null && d.__yxml !== false) {
d.__yxml._unbindFromDom()
}
if (parent._domFilter(d, []) !== null) {
let type
if (d.nodeType === document.TEXT_NODE) {
type = new YXmlText(d)
} else if (d.nodeType === document.ELEMENT_NODE) {
type = new YXmlFragment._YXmlElement(d, parent._domFilter)
} else {
throw new Error('Unsupported node!')
}
type.enableSmartScrolling(parent._scrollElement)
types.push(type)
} else {
d.__yxml = false
}
})
return types
}
export default class YXmlFragment extends YArray {
constructor () {
super()
this._dom = null
this._domFilter = defaultDomFilter
this._domObserver = null
// this function makes sure that either the
// dom event is executed, or the yjs observer is executed
var token = true
this._mutualExclude = f => {
if (token) {
token = false
try {
f()
} catch (e) {
console.error(e)
}
this._domObserver.takeRecords()
token = true
}
}
// Apply Y.Xml events to dom
this.observe(reflectChangesOnDom)
}
enableSmartScrolling (scrollElement) {
this._scrollElement = scrollElement
this.forEach(xml => {
xml.enableSmartScrolling(scrollElement)
})
}
setDomFilter (f) {
this._domFilter = f
this.forEach(xml => {
xml.setDomFilter(f)
})
}
_callObserver (parentSub) {
let event
if (parentSub !== null) {
event = {
type: 'attributeChanged',
name: parentSub,
value: this.getAttribute(parentSub),
target: this
}
} else {
event = {
type: 'contentChanged',
target: this
}
}
this._eventHandler.callEventListeners(event)
}
toString () {
return this.map(xml => xml.toString()).join('')
}
_unbindFromDom () {
if (this._domObserver != null) {
this._domObserver.disconnect()
this._domObserver = null
}
if (this._dom != null) {
this._dom.__yxml = null
this._dom = null
}
}
insertDomElementsAfter (prev, doms) {
const types = domToYXml(this, doms)
return this.insertAfter(prev, types)
}
insertDomElements (pos, doms) {
const types = domToYXml(this, doms)
this.insert(pos, types)
return types.length
}
bindToDom (dom) {
if (this._dom != null) {
this._unbindFromDom()
}
if (dom.__yxml != null) {
dom.__yxml._unbindFromDom()
}
if (MutationObserver == null) {
throw new Error('Not able to bind to a DOM element, because MutationObserver is not available!')
}
dom.innerHTML = ''
this.forEach(t => {
dom.insertBefore(t.getDom(), null)
})
this._dom = dom
dom.__yxml = this
this._bindToDom(dom)
}
// binds to a dom element
// Only call if dom and YXml are isomorph
_bindToDom (dom) {
this._domObserverListener = mutations => {
this._mutualExclude(() => {
let diffChildren = false
mutations.forEach(mutation => {
if (mutation.type === 'attributes') {
let name = mutation.attributeName
// check if filter accepts attribute
if (this._domFilter(this._dom, [name]).length > 0) {
var val = mutation.target.getAttribute(name)
if (this.getAttribute(name) !== val) {
if (val == null) {
this.removeAttribute(name)
} else {
this.setAttribute(name, val)
}
}
}
} else if (mutation.type === 'childList') {
diffChildren = true
}
})
if (diffChildren) {
applyChangesFromDom(this)
}
})
}
this._domObserver = new MutationObserver(this._domObserverListener)
const observeOptions = { childList: true }
if (this instanceof YXmlFragment._YXmlElement) {
observeOptions.attributes = true
}
this._domObserver.observe(dom, observeOptions)
return dom
}
_beforeChange () {
if (this._domObserver != null) {
this._domObserverListener(this._domObserver.takeRecords())
}
}
}

157
src/Type/y-xml/YXmlText.js Normal file
View File

@@ -0,0 +1,157 @@
/* global getSelection, MutationObserver */
import diff from 'fast-diff'
import YText from '../YText.js'
import { getAnchorViewPosition, fixScrollPosition, getBoundingClientRect } from './utils.js'
function fixPosition (event, pos) {
if (event.index <= pos) {
if (event.type === 'delete') {
return pos - Math.min(pos - event.index, event.length)
} else {
return pos + 1
}
} else {
return pos
}
}
export default class YXmlText extends YText {
constructor (arg1) {
let dom = null
let initialText = null
if (arg1 != null && arg1.nodeType === document.TEXT_NODE) {
dom = arg1
initialText = dom.nodeValue
}
super(initialText)
this._dom = null
this._domObserver = null
this._domObserverListener = null
this._scrollElement = null
if (dom !== null) {
this._setDom(arg1)
}
var token = true
this._mutualExclude = f => {
if (token) {
token = false
try {
f()
} catch (e) {
console.error(e)
}
this._domObserver.takeRecords()
token = true
}
}
this.observe(event => {
if (this._dom != null) {
const dom = this._dom
this._mutualExclude(() => {
let selection = null
let shouldUpdateSelection = false
let anchorNode = null
let anchorOffset = null
let focusNode = null
let focusOffset = null
if (typeof getSelection !== 'undefined') {
selection = getSelection()
if (selection.anchorNode === dom) {
anchorNode = selection.anchorNode
anchorOffset = fixPosition(event, selection.anchorOffset)
shouldUpdateSelection = true
}
if (selection.focusNode === dom) {
focusNode = selection.focusNode
focusOffset = fixPosition(event, selection.focusOffset)
shouldUpdateSelection = true
}
}
let anchorViewPosition = getAnchorViewPosition(this._scrollElement)
let anchorViewFix
if (anchorViewPosition !== null && (anchorViewPosition.anchor !== null || getBoundingClientRect(this._dom).top <= 0)) {
anchorViewFix = anchorViewPosition
} else {
anchorViewFix = null
}
dom.nodeValue = this.toString()
fixScrollPosition(this._scrollElement, anchorViewFix)
if (shouldUpdateSelection) {
selection.setBaseAndExtent(
anchorNode || selection.anchorNode,
anchorOffset || selection.anchorOffset,
focusNode || selection.focusNode,
focusOffset || selection.focusOffset
)
}
})
}
})
}
setDomFilter () {}
enableSmartScrolling (scrollElement) {
this._scrollElement = scrollElement
}
_setDom (dom) {
if (this._dom != null) {
this._unbindFromDom()
}
if (dom.__yxml != null) {
dom.__yxml._unbindFromDom()
}
// set marker
this._dom = dom
dom.__yxml = this
if (typeof MutationObserver === 'undefined') {
return
}
this._domObserverListener = () => {
this._mutualExclude(() => {
var diffs = diff(this.toString(), dom.nodeValue)
var pos = 0
for (var i = 0; i < diffs.length; i++) {
var d = diffs[i]
if (d[0] === 0) { // EQUAL
pos += d[1].length
} else if (d[0] === -1) { // DELETE
this.delete(pos, d[1].length)
} else { // INSERT
this.insert(pos, d[1])
pos += d[1].length
}
}
})
}
this._domObserver = new MutationObserver(this._domObserverListener)
this._domObserver.observe(this._dom, { characterData: true })
}
getDom () {
if (this._dom == null) {
const dom = document.createTextNode(this.toString())
this._setDom(dom)
return dom
}
return this._dom
}
_beforeChange () {
if (this._domObserver != null && this._y !== null) { // TODO: do I need th y condition
this._domObserverListener(this._domObserver.takeRecords())
}
}
_delete (y, createDelete) {
this._unbindFromDom()
super._delete(y, createDelete)
}
_unbindFromDom () {
if (this._domObserver != null) {
this._domObserver.disconnect()
this._domObserver = null
}
if (this._dom != null) {
this._dom.__yxml = null
this._dom = null
}
}
}

206
src/Type/y-xml/utils.js Normal file
View File

@@ -0,0 +1,206 @@
export function defaultDomFilter (node, attributes) {
return attributes
}
export function getAnchorViewPosition (scrollElement) {
if (scrollElement == null) {
return null
}
let anchor = document.getSelection().anchorNode
if (anchor != null) {
let top = getBoundingClientRect(anchor).top
if (top >= 0 && top <= document.documentElement.clientHeight) {
return {
anchor: anchor,
top: top
}
}
}
return {
anchor: null,
scrollTop: scrollElement.scrollTop,
scrollHeight: scrollElement.scrollHeight
}
}
// get BoundingClientRect that works on text nodes
export function getBoundingClientRect (element) {
if (element.getBoundingClientRect != null) {
// is element node
return element.getBoundingClientRect()
} else {
// is text node
if (element.parentNode == null) {
// range requires that text nodes have a parent
let span = document.createElement('span')
span.appendChild(element)
}
let range = document.createRange()
range.selectNode(element)
return range.getBoundingClientRect()
}
}
export function fixScrollPosition (scrollElement, fix) {
if (scrollElement !== null && fix !== null) {
if (fix.anchor === null) {
if (scrollElement.scrollTop === fix.scrollTop) {
scrollElement.scrollTop = scrollElement.scrollHeight - fix.scrollHeight
}
} else {
scrollElement.scrollTop = getBoundingClientRect(fix.anchor).top - fix.top
}
}
}
function iterateUntilUndeleted (item) {
while (item !== null && item._deleted) {
item = item._right
}
return item
}
/*
* 1. Check if any of the nodes was deleted
* 2. Iterate over the children.
* 2.1 If a node exists without __yxml property, insert a new node
* 2.2 If _contents.length < dom.childNodes.length, fill the
* rest of _content with childNodes
* 2.3 If a node was moved, delete it and
* recreate a new yxml element that is bound to that node.
* You can detect that a node was moved because expectedId
* !== actualId in the list
*/
export function applyChangesFromDom (yxml) {
const y = yxml._y
let knownChildren =
new Set(
Array.prototype.map.call(yxml._dom.childNodes, child => child.__yxml)
.filter(id => id !== undefined)
)
// 1. Check if any of the nodes was deleted
yxml.forEach(function (childType, i) {
if (!knownChildren.has(childType)) {
childType._delete(y)
}
})
// 2. iterate
let childNodes = yxml._dom.childNodes
let len = childNodes.length
let prevExpectedNode = null
let expectedNode = iterateUntilUndeleted(yxml._start)
for (let domCnt = 0; domCnt < len; domCnt++) {
const child = childNodes[domCnt]
const childYXml = child.__yxml
if (childYXml != null) {
if (childYXml === false) {
// should be ignored or is going to be deleted
continue
}
if (expectedNode !== null) {
if (expectedNode !== childYXml) {
// 2.3 Not expected node
if (childYXml._parent !== this) {
// element is going to be deleted by its previous parent
child.__yxml = null
} else {
childYXml._delete(y)
}
prevExpectedNode = yxml.insertDomElementsAfter(prevExpectedNode, [child])[0]
} else {
prevExpectedNode = expectedNode
expectedNode = iterateUntilUndeleted(expectedNode._right)
}
// if this is the expected node id, just continue
} else {
// 2.2 fill _conten with child nodes
prevExpectedNode = yxml.insertDomElementsAfter(prevExpectedNode, [child])[0]
}
} else {
// 2.1 A new node was found
prevExpectedNode = yxml.insertDomElementsAfter(prevExpectedNode, [child])[0]
}
}
}
export function reflectChangesOnDom (event) {
const yxml = event.target
const dom = yxml._dom
if (dom != null) {
yxml._mutualExclude(() => {
// TODO: do this once before applying stuff
// let anchorViewPosition = getAnchorViewPosition(yxml._scrollElement)
if (event.type === 'attributeChanged') {
if (event.value === undefined) {
dom.removeAttribute(event.name)
} else {
dom.setAttribute(event.name, event.value)
}
} else if (event.type === 'contentChanged') {
// create fragment of undeleted nodes
const fragment = document.createDocumentFragment()
yxml.forEach(function (t) {
fragment.append(t.getDom())
})
// remove remainding nodes
let lastChild = dom.lastChild
while (lastChild !== null) {
dom.removeChild(lastChild)
lastChild = dom.lastChild
}
// insert fragment of undeleted nodes
dom.append(fragment)
}
/* TODO: smartscrolling
.. else if (event.type === 'childInserted' || event.type === 'insert') {
let nodes = event.values
for (let i = nodes.length - 1; i >= 0; i--) {
let node = nodes[i]
node.setDomFilter(yxml._domFilter)
node.enableSmartScrolling(yxml._scrollElement)
let dom = node.getDom()
let fixPosition = null
let nextDom = null
if (yxml._content.length > event.index + i + 1) {
nextDom = yxml.get(event.index + i + 1).getDom()
}
yxml._dom.insertBefore(dom, nextDom)
if (anchorViewPosition === null) {
// nop
} else if (anchorViewPosition.anchor !== null) {
// no scrolling when current selection
if (!dom.contains(anchorViewPosition.anchor) && !anchorViewPosition.anchor.contains(dom)) {
fixPosition = anchorViewPosition
}
} else if (getBoundingClientRect(dom).top <= 0) {
// adjust scrolling if modified element is out of view,
// there is no anchor element, and the browser did not adjust scrollTop (this is checked later)
fixPosition = anchorViewPosition
}
fixScrollPosition(yxml._scrollElement, fixPosition)
}
} else if (event.type === 'childRemoved' || event.type === 'delete') {
for (let i = event.values.length - 1; i >= 0; i--) {
let dom = event.values[i]._dom
let fixPosition = null
if (anchorViewPosition === null) {
// nop
} else if (anchorViewPosition.anchor !== null) {
// no scrolling when current selection
if (!dom.contains(anchorViewPosition.anchor) && !anchorViewPosition.anchor.contains(dom)) {
fixPosition = anchorViewPosition
}
} else if (getBoundingClientRect(dom).top <= 0) {
// adjust scrolling if modified element is out of view,
// there is no anchor element, and the browser did not adjust scrollTop (this is checked later)
fixPosition = anchorViewPosition
}
dom.remove()
fixScrollPosition(yxml._scrollElement, fixPosition)
}
}
*/
})
}
}

9
src/Type/y-xml/y-xml.js Normal file
View File

@@ -0,0 +1,9 @@
import YXmlFragment from './YXmlFragment.js'
import YXmlElement from './YXmlElement.js'
export { default as YXmlFragment } from './YXmlFragment.js'
export { default as YXmlElement } from './YXmlElement.js'
export { default as YXmlText } from './YXmlText.js'
YXmlFragment._YXmlElement = YXmlElement

9
src/Util/deleteItemRange.js
View File

@@ -1,9 +0,0 @@
import Delete from '../Struct/Delete'
import ID from './ID'
export function deleteItemRange (y, user, clock, length) {
let del = new Delete()
del._target = new ID(user, clock)
del._length = length
del._integrate(y)
}

21
src/Util/structReferences.js
View File

@@ -1,8 +1,11 @@
import YArray from '../Type/YArray.js'
import YMap from '../Type/YMap.js'
import YText from '../Type/YText.js'
import YXml from '../Type/YXml.js'
import YXmlFragment from '../Type/y-xml/YXmlFragment.js'
import YXmlElement from '../Type/y-xml/YXmlElement.js'
import YXmlText from '../Type/y-xml/YXmlText.js'
import Delete from '../Struct/Delete.js'
import ItemJSON from '../Struct/ItemJSON.js'
import ItemString from '../Struct/ItemString.js'
@@ -22,9 +25,13 @@ export function getReference (typeConstructor) {
return references.get(typeConstructor)
}
addStruct(0, YArray)
addStruct(1, YMap)
addStruct(2, YText)
addStruct(3, YXml)
addStruct(4, ItemJSON)
addStruct(5, ItemString)
addStruct(0, ItemJSON)
addStruct(1, ItemString)
addStruct(2, Delete)
addStruct(3, YArray)
addStruct(4, YMap)
addStruct(5, YText)
addStruct(6, YXmlFragment)
addStruct(7, YXmlElement)
addStruct(8, YXmlText)

40
src/Y.js
View File

@@ -12,15 +12,22 @@ import Persistence from './Persistence.js'
import YArray from './Type/YArray.js'
import YMap from './Type/YMap.js'
import YText from './Type/YText.js'
import YXml from './Type/YXml.js'
import { YXmlFragment, YXmlElement, YXmlText } from './Type/y-xml/y-xml.js'
import BinaryDecoder from './Binary/Decoder.js'
import debug from 'debug'
function callTypesAfterTransaction (y) {
y._transactionChangedTypes.forEach(function (parentSub, type) {
type._callObserver(parentSub)
})
}
export default class Y extends NamedEventHandler {
constructor (opts) {
super()
this._opts = opts
this.userID = generateUserID()
this.userID = opts._userID != null ? opts._userID : generateUserID()
this.ds = new DeleteStore(this)
this.os = new OperationStore(this)
this.ss = new StateStore(this)
@@ -34,6 +41,27 @@ export default class Y extends NamedEventHandler {
this.connected = true
this._missingStructs = new Map()
this._readyToIntegrate = []
this._transactionsInProgress = 0
// types added during transaction
this._transactionNewTypes = new Set()
// changed types (does not include new types)
this._transactionChangedTypes = new Map()
this.on('afterTransaction', callTypesAfterTransaction)
}
_beforeChange () {}
transact (f) {
this._transactionsInProgress++
try {
f()
} catch (e) {
console.error(e)
}
this._transactionsInProgress--
if (this._transactionsInProgress === 0) {
this.emit('afterTransaction', this)
this._transactionChangedTypes = new Map()
this._transactionNewTypes = new Set()
}
}
// fake _start for root properties (y.set('name', type))
get _start () {
@@ -102,9 +130,13 @@ Y.Persisence = Persistence
Y.Array = YArray
Y.Map = YMap
Y.Text = YText
Y.Xml = YXml
Y.XmlElement = YXmlElement
Y.XmlFragment = YXmlFragment
Y.XmlText = YXmlText
export { default as debug } from 'debug'
Y.utils = {
BinaryDecoder
}
Y.debug = debug
debug.formatters.Y = messageToString

3
src/y-dist.cjs.js Normal file
View File

@@ -0,0 +1,3 @@
import Y from './Y.js'
export default Y