overleaf/services/web/frontend/js/ide/editor/Document.js

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/* eslint-disable
camelcase,
node/handle-callback-err,
max-len,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
* decaffeinate suggestions:
* DS001: Remove Babel/TypeScript constructor workaround
* DS101: Remove unnecessary use of Array.from
* DS102: Remove unnecessary code created because of implicit returns
* DS103: Rewrite code to no longer use __guard__
* DS205: Consider reworking code to avoid use of IIFEs
* DS206: Consider reworking classes to avoid initClass
* DS207: Consider shorter variations of null checks
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
*/
import EventEmitter from '../../utils/EventEmitter'
import ShareJsDoc from './ShareJsDoc'
import RangesTracker from '../review-panel/RangesTracker'
let Document
export default Document = (function () {
Document = class Document extends EventEmitter {
static initClass() {
this.prototype.MAX_PENDING_OP_SIZE = 64
}
static getDocument(ide, doc_id) {
if (!this.openDocs) {
this.openDocs = {}
}
// Try to clean up existing docs before reopening them. If the doc has no
// buffered ops then it will be deleted by _cleanup() and a new instance
// of the document created below. This prevents us trying to follow the
// joinDoc:existing code path on an existing doc that doesn't have any
// local changes and getting an error if its version is too old.
if (this.openDocs[doc_id]) {
sl_console.log(
`[getDocument] Cleaning up existing document instance for ${doc_id}`
)
this.openDocs[doc_id]._cleanUp()
}
if (this.openDocs[doc_id] == null) {
sl_console.log(
`[getDocument] Creating new document instance for ${doc_id}`
)
this.openDocs[doc_id] = new Document(ide, doc_id)
} else {
sl_console.log(
`[getDocument] Returning existing document instance for ${doc_id}`
)
}
return this.openDocs[doc_id]
}
static hasUnsavedChanges() {
const object = this.openDocs || {}
for (const doc_id in object) {
const doc = object[doc_id]
if (doc.hasBufferedOps()) {
return true
}
}
return false
}
static flushAll() {
return (() => {
const result = []
for (const doc_id in this.openDocs) {
const doc = this.openDocs[doc_id]
result.push(doc.flush())
}
return result
})()
}
constructor(ide, doc_id) {
super()
this.ide = ide
this.doc_id = doc_id
this.connected = this.ide.socket.socket.connected
this.joined = false
this.wantToBeJoined = false
this._checkAceConsistency = () => this._checkConsistency(this.ace)
this._checkCMConsistency = () => this._checkConsistency(this.cm)
this._checkCM6Consistency = () => this._checkConsistency(this.cm6)
this._bindToEditorEvents()
this._bindToSocketEvents()
}
attachToAce(ace) {
this.ace = ace
if (this.doc != null) {
this.doc.attachToAce(this.ace)
}
const editorDoc = this.ace.getSession().getDocument()
editorDoc.on('change', this._checkAceConsistency)
return this.ide.$scope.$emit('document:opened', this.doc)
}
detachFromAce() {
if (this.doc != null) {
this.doc.detachFromAce()
}
const editorDoc =
this.ace != null ? this.ace.getSession().getDocument() : undefined
if (editorDoc != null) {
editorDoc.off('change', this._checkAceConsistency)
}
delete this.ace
this.clearChaosMonkey()
return this.ide.$scope.$emit('document:closed', this.doc)
}
attachToCM(cm) {
this.cm = cm
if (this.doc != null) {
this.doc.attachToCM(this.cm)
}
if (this.cm != null) {
this.cm.on('change', this._checkCMConsistency)
}
return this.ide.$scope.$emit('document:opened', this.doc)
}
detachFromCM() {
if (this.doc != null) {
this.doc.detachFromCM()
}
if (this.cm != null) {
this.cm.off('change', this._checkCMConsistency)
}
delete this.cm
this.clearChaosMonkey()
return this.ide.$scope.$emit('document:closed', this.doc)
}
attachToCM6(cm6) {
this.cm6 = cm6
if (this.doc != null) {
this.doc.attachToCM6(this.cm6)
}
if (this.cm6 != null) {
this.cm6.on('change', this._checkCM6Consistency)
}
return this.ide.$scope.$emit('document:opened', this.doc)
}
detachFromCM6() {
if (this.doc != null) {
this.doc.detachFromCM6()
}
if (this.cm6 != null) {
this.cm6.off('change', this._checkCM6Consistency)
}
delete this.cm6
this.clearChaosMonkey()
return this.ide.$scope.$emit('document:closed', this.doc)
}
submitOp(...args) {
return this.doc != null
? this.doc.submitOp(...Array.from(args || []))
: undefined
}
_checkConsistency(editor) {
// We've been seeing a lot of errors when I think there shouldn't be
// any, which may be related to this check happening before the change is
// applied. If we use a timeout, hopefully we can reduce this.
return setTimeout(() => {
const editorValue = editor != null ? editor.getValue() : undefined
const sharejsValue =
this.doc != null ? this.doc.getSnapshot() : undefined
if (editorValue !== sharejsValue) {
return this._onError(
new Error('Editor text does not match server text'),
{},
editorValue
)
}
}, 0)
}
getSnapshot() {
return this.doc != null ? this.doc.getSnapshot() : undefined
}
getType() {
return this.doc != null ? this.doc.getType() : undefined
}
getInflightOp() {
return this.doc != null ? this.doc.getInflightOp() : undefined
}
getPendingOp() {
return this.doc != null ? this.doc.getPendingOp() : undefined
}
getRecentAck() {
return this.doc != null ? this.doc.getRecentAck() : undefined
}
getOpSize(op) {
return this.doc != null ? this.doc.getOpSize(op) : undefined
}
hasBufferedOps() {
return this.doc != null ? this.doc.hasBufferedOps() : undefined
}
setTrackingChanges(track_changes) {
return (this.doc.track_changes = track_changes)
}
getTrackingChanges() {
return !!this.doc.track_changes
}
setTrackChangesIdSeeds(id_seeds) {
return (this.doc.track_changes_id_seeds = id_seeds)
}
_bindToSocketEvents() {
this._onUpdateAppliedHandler = update => this._onUpdateApplied(update)
this.ide.socket.on('otUpdateApplied', this._onUpdateAppliedHandler)
this._onErrorHandler = (error, message) => {
// 'otUpdateError' are emitted per doc socket.io room, hence we can be
// sure that message.doc_id exists.
if (message.doc_id !== this.doc_id) {
// This error is for another doc. Do not action it. We could open
// a modal that has the wrong context on it.
return
}
this._onError(error, message)
}
this.ide.socket.on('otUpdateError', this._onErrorHandler)
this._onDisconnectHandler = error => this._onDisconnect(error)
return this.ide.socket.on('disconnect', this._onDisconnectHandler)
}
_bindToEditorEvents() {
const onReconnectHandler = update => {
return this._onReconnect(update)
}
return (this._unsubscribeReconnectHandler = this.ide.$scope.$on(
'project:joined',
onReconnectHandler
))
}
_unBindFromEditorEvents() {
return this._unsubscribeReconnectHandler()
}
_unBindFromSocketEvents() {
this.ide.socket.removeListener(
'otUpdateApplied',
this._onUpdateAppliedHandler
)
this.ide.socket.removeListener('otUpdateError', this._onErrorHandler)
return this.ide.socket.removeListener(
'disconnect',
this._onDisconnectHandler
)
}
leaveAndCleanUp(cb) {
return this.leave(error => {
this._cleanUp()
if (cb) cb(error)
})
}
join(callback) {
if (callback == null) {
callback = function () {}
}
this.wantToBeJoined = true
this._cancelLeave()
if (this.connected) {
return this._joinDoc(callback)
} else {
if (!this._joinCallbacks) {
this._joinCallbacks = []
}
return this._joinCallbacks.push(callback)
}
}
leave(callback) {
if (callback == null) {
callback = function () {}
}
this.flush() // force an immediate flush when leaving document
this.wantToBeJoined = false
this._cancelJoin()
if (this.doc != null && this.doc.hasBufferedOps()) {
sl_console.log(
'[leave] Doc has buffered ops, pushing callback for later'
)
if (!this._leaveCallbacks) {
this._leaveCallbacks = []
}
return this._leaveCallbacks.push(callback)
} else if (!this.connected) {
sl_console.log('[leave] Not connected, returning now')
return callback()
} else {
sl_console.log('[leave] Leaving now')
return this._leaveDoc(callback)
}
}
flush() {
return this.doc != null ? this.doc.flushPendingOps() : undefined
}
chaosMonkey(line, char) {
if (line == null) {
line = 0
}
if (char == null) {
char = 'a'
}
const orig = char
let copy = null
let pos = 0
const timer = () => {
if (copy == null || !copy.length) {
copy = orig.slice() + ' ' + new Date() + '\n'
line += Math.random() > 0.1 ? 1 : -2
if (line < 0) {
line = 0
}
pos = 0
}
char = copy[0]
copy = copy.slice(1)
if (this.ace) {
this.ace.session.insert({ row: line, column: pos }, char)
} else if (this.cm6) {
this.cm6.view.dispatch({
changes: {
from: Math.min(pos, this.cm6.view.state.doc.length),
insert: char,
},
})
}
pos += 1
return (this._cm = setTimeout(
timer,
100 + (Math.random() < 0.1 ? 1000 : 0)
))
}
return (this._cm = timer())
}
clearChaosMonkey() {
const timer = this._cm
if (timer) {
delete this._cm
return clearTimeout(timer)
}
}
pollSavedStatus() {
// returns false if doc has ops waiting to be acknowledged or
// sent that haven't changed since the last time we checked.
// Otherwise returns true.
let saved
const inflightOp = this.getInflightOp()
const pendingOp = this.getPendingOp()
const recentAck = this.getRecentAck()
const pendingOpSize = pendingOp != null && this.getOpSize(pendingOp)
if (inflightOp == null && pendingOp == null) {
// there's nothing going on, this is ok.
saved = true
sl_console.log('[pollSavedStatus] no inflight or pending ops')
} else if (inflightOp != null && inflightOp === this.oldInflightOp) {
// The same inflight op has been sitting unacked since we
// last checked, this is bad.
saved = false
sl_console.log('[pollSavedStatus] inflight op is same as before')
} else if (
pendingOp != null &&
recentAck &&
pendingOpSize < this.MAX_PENDING_OP_SIZE
) {
// There is an op waiting to go to server but it is small and
// within the flushDelay, this is ok for now.
saved = true
sl_console.log(
'[pollSavedStatus] pending op (small with recent ack) assume ok',
pendingOp,
pendingOpSize
)
} else {
// In any other situation, assume the document is unsaved.
saved = false
sl_console.log(
`[pollSavedStatus] assuming not saved (inflightOp?: ${
inflightOp != null
}, pendingOp?: ${pendingOp != null})`
)
}
this.oldInflightOp = inflightOp
return saved
}
_cancelLeave() {
if (this._leaveCallbacks != null) {
return delete this._leaveCallbacks
}
}
_cancelJoin() {
if (this._joinCallbacks != null) {
return delete this._joinCallbacks
}
}
_onUpdateApplied(update) {
this.ide.pushEvent('received-update', {
doc_id: this.doc_id,
remote_doc_id: update != null ? update.doc : undefined,
wantToBeJoined: this.wantToBeJoined,
update,
hasDoc: this.doc != null,
})
if (
window.disconnectOnAck != null &&
Math.random() < window.disconnectOnAck
) {
sl_console.log('Disconnecting on ack', update)
window._ide.socket.socket.disconnect()
// Pretend we never received the ack
return
}
if (window.dropAcks != null && Math.random() < window.dropAcks) {
if (update.op == null) {
// Only drop our own acks, not collaborator updates
sl_console.log('Simulating a lost ack', update)
return
}
}
if (
(update != null ? update.doc : undefined) === this.doc_id &&
this.doc != null
) {
this.ide.pushEvent('received-update:processing', {
update,
})
// FIXME: change this back to processUpdateFromServer when redis fixed
this.doc.processUpdateFromServerInOrder(update)
if (!this.wantToBeJoined) {
return this.leave()
}
}
}
_onDisconnect() {
sl_console.log('[onDisconnect] disconnecting')
this.connected = false
this.joined = false
return this.doc != null
? this.doc.updateConnectionState('disconnected')
: undefined
}
_onReconnect() {
sl_console.log('[onReconnect] reconnected (joined project)')
this.ide.pushEvent('reconnected:afterJoinProject')
this.connected = true
if (
this.wantToBeJoined ||
(this.doc != null ? this.doc.hasBufferedOps() : undefined)
) {
sl_console.log(
`[onReconnect] Rejoining (wantToBeJoined: ${
this.wantToBeJoined
} OR hasBufferedOps: ${
this.doc != null ? this.doc.hasBufferedOps() : undefined
})`
)
return this._joinDoc(error => {
if (error != null) {
return this._onError(error)
}
this.doc.updateConnectionState('ok')
this.doc.flushPendingOps()
return this._callJoinCallbacks()
})
}
}
_callJoinCallbacks() {
for (const callback of Array.from(this._joinCallbacks || [])) {
callback()
}
return delete this._joinCallbacks
}
_joinDoc(callback) {
if (callback == null) {
callback = function () {}
}
if (this.doc != null) {
this.ide.pushEvent('joinDoc:existing', {
doc_id: this.doc_id,
version: this.doc.getVersion(),
})
return this.ide.socket.emit(
'joinDoc',
this.doc_id,
this.doc.getVersion(),
{ encodeRanges: true },
(error, docLines, version, updates, ranges) => {
if (error != null) {
return callback(error)
}
this.joined = true
this.doc.catchUp(updates)
this._decodeRanges(ranges)
this._catchUpRanges(
ranges != null ? ranges.changes : undefined,
ranges != null ? ranges.comments : undefined
)
return callback()
}
)
} else {
this.ide.pushEvent('joinDoc:new', {
doc_id: this.doc_id,
})
return this.ide.socket.emit(
'joinDoc',
this.doc_id,
{ encodeRanges: true },
(error, docLines, version, updates, ranges) => {
if (error != null) {
return callback(error)
}
this.joined = true
this.ide.pushEvent('joinDoc:inited', {
doc_id: this.doc_id,
version,
})
this.doc = new ShareJsDoc(
this.doc_id,
docLines,
version,
this.ide.socket,
this.ide.globalEditorWatchdogManager
)
this._decodeRanges(ranges)
this.ranges = new RangesTracker(
ranges != null ? ranges.changes : undefined,
ranges != null ? ranges.comments : undefined
)
this._bindToShareJsDocEvents()
return callback()
}
)
}
}
_decodeRanges(ranges) {
const decodeFromWebsockets = text => decodeURIComponent(escape(text))
try {
for (const change of Array.from(ranges.changes || [])) {
if (change.op.i != null) {
change.op.i = decodeFromWebsockets(change.op.i)
}
if (change.op.d != null) {
change.op.d = decodeFromWebsockets(change.op.d)
}
}
return (() => {
const result = []
for (const comment of Array.from(ranges.comments || [])) {
if (comment.op.c != null) {
result.push((comment.op.c = decodeFromWebsockets(comment.op.c)))
} else {
result.push(undefined)
}
}
return result
})()
} catch (err) {
return console.log(err)
}
}
_leaveDoc(callback) {
if (callback == null) {
callback = function () {}
}
this.ide.pushEvent('leaveDoc', {
doc_id: this.doc_id,
})
sl_console.log('[_leaveDoc] Sending leaveDoc request')
return this.ide.socket.emit('leaveDoc', this.doc_id, error => {
if (error != null) {
return callback(error)
}
this.joined = false
for (callback of Array.from(this._leaveCallbacks || [])) {
sl_console.log('[_leaveDoc] Calling buffered callback', callback)
callback(error)
}
delete this._leaveCallbacks
return callback(error)
})
}
_cleanUp() {
// if we arrive here from _onError the pending and inflight ops will have been cleared
if (this.hasBufferedOps()) {
sl_console.log(
`[_cleanUp] Document (${this.doc_id}) has buffered ops, refusing to remove from openDocs`
)
return // return immediately, do not unbind from events
} else if (Document.openDocs[this.doc_id] === this) {
sl_console.log(
`[_cleanUp] Removing self (${this.doc_id}) from in openDocs`
)
delete Document.openDocs[this.doc_id]
} else {
// It's possible that this instance has error, and the doc has been reloaded.
// This creates a new instance in Document.openDoc with the same id. We shouldn't
// clear it because it's not this instance.
sl_console.log(
`[_cleanUp] New instance of (${this.doc_id}) created. Not removing`
)
}
this._unBindFromEditorEvents()
return this._unBindFromSocketEvents()
}
_bindToShareJsDocEvents() {
this.doc.on('error', (error, meta) => this._onError(error, meta))
this.doc.on('externalUpdate', update => {
this.ide.pushEvent('externalUpdate', { doc_id: this.doc_id })
return this.trigger('externalUpdate', update)
})
this.doc.on('remoteop', (...args) => {
this.ide.pushEvent('remoteop', { doc_id: this.doc_id })
return this.trigger('remoteop', ...Array.from(args))
})
this.doc.on('op:sent', op => {
this.ide.pushEvent('op:sent', {
doc_id: this.doc_id,
op,
})
return this.trigger('op:sent')
})
this.doc.on('op:acknowledged', op => {
this.ide.pushEvent('op:acknowledged', {
doc_id: this.doc_id,
op,
})
this.ide.$scope.$emit('ide:opAcknowledged', {
doc_id: this.doc_id,
op,
})
return this.trigger('op:acknowledged')
})
this.doc.on('op:timeout', op => {
this.ide.pushEvent('op:timeout', {
doc_id: this.doc_id,
op,
})
this.trigger('op:timeout')
return this._onError(new Error('op timed out'))
})
this.doc.on('flush', (inflightOp, pendingOp, version) => {
return this.ide.pushEvent('flush', {
doc_id: this.doc_id,
inflightOp,
pendingOp,
v: version,
})
})
this.doc.on('change', (ops, oldSnapshot, msg) => {
this._applyOpsToRanges(ops, oldSnapshot, msg)
window.dispatchEvent(
new CustomEvent('doc:changed', { detail: { id: this.doc_id } })
)
return this.ide.$scope.$emit('doc:changed', { doc_id: this.doc_id })
})
this.doc.on('flipped_pending_to_inflight', () => {
return this.trigger('flipped_pending_to_inflight')
})
return this.doc.on('saved', () => {
window.dispatchEvent(
new CustomEvent('doc:saved', { detail: { id: this.doc_id } })
)
return this.ide.$scope.$emit('doc:saved', { doc_id: this.doc_id })
})
}
_onError(error, meta, editorContent) {
if (meta == null) {
meta = {}
}
meta.doc_id = this.doc_id
sl_console.log('ShareJS error', error, meta)
if (error.message === 'no project_id found on client') {
sl_console.log('ignoring error, will wait to join project')
return
}
if (this.doc != null) {
this.doc.clearInflightAndPendingOps()
}
this.trigger('error', error, meta, editorContent)
// The clean up should run after the error is triggered because the error triggers a
// disconnect. If we run the clean up first, we remove our event handlers and miss
// the disconnect event, which means we try to leaveDoc when the connection comes back.
// This could intefere with the new connection of a new instance of this document.
return this._cleanUp()
}
_applyOpsToRanges(ops, oldSnapshot, msg) {
let old_id_seed
if (ops == null) {
ops = []
}
let track_changes_as = null
const remote_op = msg != null
if (__guard__(msg != null ? msg.meta : undefined, x => x.tc) != null) {
old_id_seed = this.ranges.getIdSeed()
this.ranges.setIdSeed(msg.meta.tc)
}
if (remote_op && (msg.meta != null ? msg.meta.tc : undefined)) {
track_changes_as = msg.meta.user_id
} else if (!remote_op && this.track_changes_as != null) {
;({ track_changes_as } = this)
}
this.ranges.track_changes = track_changes_as != null
for (const op of Array.from(ops)) {
this.ranges.applyOp(op, { user_id: track_changes_as })
}
if (old_id_seed != null) {
this.ranges.setIdSeed(old_id_seed)
}
if (remote_op) {
// With remote ops, Ace hasn't been updated when we receive this op,
// so defer updating track changes until it has
return setTimeout(() => this.emit('ranges:dirty'))
} else {
return this.emit('ranges:dirty')
}
}
_catchUpRanges(changes, comments) {
// We've just been given the current server's ranges, but need to apply any local ops we have.
// Reset to the server state then apply our local ops again.
if (changes == null) {
changes = []
}
if (comments == null) {
comments = []
}
this.emit('ranges:clear')
this.ranges.changes = changes
this.ranges.comments = comments
this.ranges.track_changes = this.doc.track_changes
for (const op of Array.from(this.doc.getInflightOp() || [])) {
this.ranges.setIdSeed(this.doc.track_changes_id_seeds.inflight)
this.ranges.applyOp(op, { user_id: this.track_changes_as })
}
for (const op of Array.from(this.doc.getPendingOp() || [])) {
this.ranges.setIdSeed(this.doc.track_changes_id_seeds.pending)
this.ranges.applyOp(op, { user_id: this.track_changes_as })
}
return this.emit('ranges:redraw')
}
}
Document.initClass()
return Document
})()
function __guard__(value, transform) {
return typeof value !== 'undefined' && value !== null
? transform(value)
: undefined
}