13.6.1

docs: fix JSDoc typo

.babelrc

@@ -1,12 +0,0 @@
-{
-  "presets": [
-    ["latest", {
-      "es2015": {
-        "modules": false
-      }
-    }]
-  ],
-  "plugins": [
-    "external-helpers"
-  ]
-}

.flowconfig

@@ -1,14 +0,0 @@
-[ignore]
-.*/node_modules/.*
-.*/dist/.*
-.*/build/.*
-
-[include]
-./src/
-./tests-lib/
-./test/
-
-[libs]
-./declarations/
-
-[options]

.github/workflows/node.js.yml

@@ -0,0 +1,31 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x, 18.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm ci
+    - run: npm run lint
+    - run: npm run test-extensive
+      env:
+        CI: true

.gitignore

@@ -1,4 +1,4 @@
 node_modules
-bower_components
+dist
-/y.*
+.vscode
-/examples/yjs-dist.js*
+docs

.jsdoc.json

@@ -0,0 +1,52 @@
+{
+  "sourceType": "module",
+  "tags": {
+    "allowUnknownTags": true,
+    "dictionaries": ["jsdoc"]
+  },
+  "source": {
+    "include": ["./src"],
+    "includePattern": ".js$"
+  },
+  "plugins": [
+    "plugins/markdown"
+  ],
+  "templates": {
+    "referenceTitle": "Yjs",
+    "disableSort": false,
+    "useCollapsibles": true,
+    "collapse": true,
+    "resources": {
+      "yjs.dev": "Website",
+      "docs.yjs.dev": "Docs",
+      "discuss.yjs.dev": "Forum",
+      "https://gitter.im/Yjs/community": "Chat"
+    },
+    "logo": {
+      "url": "https://yjs.dev/images/logo/yjs-512x512.png",
+      "width": "162px",
+      "height": "162px",
+      "link": "/"
+    },
+    "tabNames": {
+      "api": "API",
+      "tutorials": "Examples"
+    },
+    "footerText": "Shared Editing",
+    "css": [
+      "./style.css"
+    ],
+    "default": {
+      "staticFiles": {
+          "include": []
+      }
+    }
+  },
+  "opts": {
+    "destination": "./docs/",
+    "encoding": "utf8",
+    "private": false,
+    "recurse": true,
+    "template": "./node_modules/tui-jsdoc-template"
+  }
+}

.markdownlint.json

@@ -0,0 +1,4 @@
+{
+  "default": true,
+  "no-inline-html": false
+}

INTERNALS.md

@@ -0,0 +1,179 @@
+# Yjs Internals
+
+This document roughly explains how Yjs works internally. There is a complete
+walkthrough of the Yjs codebase available as a recording:
+https://youtu.be/0l5XgnQ6rB4
+
+The Yjs CRDT algorithm is described in the [YATA
+paper](https://www.researchgate.net/publication/310212186_Near_Real-Time_Peer-to-Peer_Shared_Editing_on_Extensible_Data_Types)
+from 2016. For an algorithmic view of how it works, the paper is a reasonable
+place to start. There are a handful of small improvements implemented in Yjs
+which aren't described in the paper. The most notable is that items have an
+`originRight` as well as an `origin` property, which improves performance when
+many concurrent inserts happen after the same character.
+
+At its heart, Yjs is a list CRDT. Everything is squeezed into a list in order to
+reuse the CRDT resolution algorithm:
+
+- Arrays are easy - they're lists of arbitrary items.
+- Text is a list of characters, optionally punctuated by formatting markers and
+  embeds for rich text support. Several characters can be wrapped in a single
+linked list `Item` (this is also known as the compound representation of
+CRDTs). More information about this in [this blog
+article](https://blog.kevinjahns.de/are-crdts-suitable-for-shared-editing/).
+- Maps are lists of entries. The last inserted entry for each key is used, and
+  all other duplicates for each key are flagged as deleted.
+
+Each client is assigned a unique *clientID* property on first insert. This is a
+random 53-bit integer (53 bits because that fits in the javascript safe integer
+range).
+
+## List items
+
+Each item in a Yjs list is made up of two objects:
+
+- An `Item` (*src/structs/Item.js*). This is used to relate the item to other
+  adjacent items.
+- An object in the `AbstractType` hierarchy (subclasses of
+  *src/types/AbstractType.js* - eg `YText`). This stores the actual content in
+the Yjs document.
+
+The item and type object pair have a 1-1 mapping. The item's `content` field
+references the AbstractType object and the AbstractType object's `_item` field
+references the item.
+
+Everything inserted in a Yjs document is given a unique ID, formed from a
+*ID(clientID, clock)* pair (also known as a [Lamport
+Timestamp](https://en.wikipedia.org/wiki/Lamport_timestamp)). The clock counts
+up from 0 with the first inserted character or item a client makes. This is
+similar to automerge's operation IDs, but note that the clock is only
+incremented by inserts. Deletes are handled in a very different way (see
+below).
+
+If a run of characters is inserted into a document (eg `"abc"`), the clock will
+be incremented for each character (eg 3 times here). But Yjs will only add a
+single `Item` into the list. This has no effect on the core CRDT algorithm, but
+the optimization dramatically decreases the number of javascript objects
+created during normal text editing. This optimization only applies if the
+characters share the same clientID, they're inserted in order, and all
+characters have either been deleted or all characters are not deleted. The item
+will be split if the run is interrupted for any reason (eg a character in the
+middle of the run is deleted).
+
+When an item is created, it stores a reference to the IDs of the preceeding and
+succeeding item. These are stored in the item's `origin` and `originRight`
+fields, respectively. These are used when peers concurrently insert at the same
+location in a document. Though quite rare in practice, Yjs needs to make sure
+the list items always resolve to the same order on all peers. The actual logic
+is relatively simple - its only a couple dozen lines of code and it lives in
+the `Item#integrate()` method. The YATA paper has much more detail on this
+algorithm.
+
+### Item Storage
+
+The items themselves are stored in two data structures and a cache:
+
+- The items are stored in a tree of doubly-linked lists in *document order*.
+  Each item has `left` and `right` properties linking to its siblings in the
+document. Items also have a `parent` property to reference their parent in the
+document tree (null at the root). (And you can access an item's children, if
+any, through `item.content`).
+- All items are referenced in *insertion order* inside the struct store
+  (*src/utils/StructStore.js*). This references the list of items inserted by
+for each client, in chronological order. This is used to find an item in the
+tree with a given ID (using a binary search). It is also used to efficiently
+gather the operations a peer is missing during sync (more on this below).
+
+When a local insert happens, Yjs needs to map the insert position in the
+document (eg position 1000) to an ID. With just the linked list, this would
+require a slow O(n) linear scan of the list. But when editing a document, most
+inserts are either at the same position as the last insert, or nearby. To
+improve performance, Yjs stores a cache of the 10 most recently looked up
+insert positions in the document. This is consulted and updated when a position
+is looked up to improve performance in the average case. The cache is updated
+using a heuristic that is still changing (currently, it is updated when a new
+position significantly diverges from existing markers in the cache). Internally
+this is referred to as the skip list / fast search marker.
+
+### Deletions
+
+Deletions in Yjs are treated very differently from insertions. Insertions are
+implemented as a sequential operation based CRDT, but deletions are treated as
+a simpler state based CRDT.
+
+When an item has been deleted by any peer, at any point in history, it is
+flagged as deleted on the item. (Internally Yjs uses the `info` bitfield.) Yjs
+does not record metadata about a deletion:
+
+- No data is kept on *when* an item was deleted, or which user deleted it.
+- The struct store does not contain deletion records
+- The clientID's clock is not incremented
+
+If garbage collection is enabled in Yjs, when an object is deleted its content
+is discarded. If a deleted object contains children (eg a field is deleted in
+an object), the content is replaced with a `GC` object (*src/structs/GC.js*).
+This is a very lightweight structure - it only stores the length of the removed
+content.
+
+Yjs has some special logic to share which content in a document has been
+deleted:
+
+- When a delete happens, as well as marking the item, the deleted IDs are
+  listed locally within the transaction. (See below for more information about
+transactions.) When a transaction has been committed locally, the set of
+deleted items is appended to a transaction's update message.
+- A snapshot (a marked point in time in the Yjs history) is specified using
+  both the set of (clientID, clock) pairs *and* the set of all deleted item
+IDs. The deleted set is O(n), but because deletions usually happen in runs,
+this data set is usually tiny in practice. (The real world editing trace from
+the B4 benchmark document contains 182k inserts and 77k deleted characters. The
+deleted set size in a snapshot is only 4.5Kb).
+
+## Transactions
+
+All updates in Yjs happen within a *transaction*. (Defined in
+*src/utils/Transaction.js*.)
+
+The transaction collects a set of updates to the Yjs document to be applied on
+remote peers atomically. Once a transaction has been committed locally, it
+generates a compressed *update message* which is broadcast to synchronized
+remote peers to notify them of the local change. The update message contains:
+
+- The set of newly inserted items
+- The set of items deleted within the transaction.
+
+## Network protocol
+
+The network protocol is not really a part of Yjs. There are a few relevant
+concepts that can be used to create a custom network protocol:
+
+* `update`: The Yjs document can be encoded to an *update* object that can be
+  parsed to reconstruct the document. Also every change on the document fires
+an incremental document updates that allows clients to sync with each other.
+The update object is an Uint8Array that efficiently encodes `Item` objects and
+the delete set.
+* `state vector`: A state vector defines the known state of each user (a set of
+  tuples `(client, clock)`). This object is also efficiently encoded as a
+Uint8Array.
+
+The client can ask a remote client for missing document updates by sending
+their state vector (often referred to as *sync step 1*). The remote peer can
+compute the missing `Item` objects using the `clocks` of the respective clients
+and compute a minimal update message that reflects all missing updates (sync
+step 2).
+
+An implementation of the syncing process is in
+[y-protocols](https://github.com/yjs/y-protocols).
+
+## Snapshots
+
+A snapshot can be used to restore an old document state. It is a `state vector`
+\+ `delete set`. A client can restore an old document state by iterating through
+the sequence CRDT and ignoring all Items that have an `id.clock >
+stateVector[id.client].clock`. Instead of using `item.deleted` the client will
+use the delete set to find out if an item was deleted or not.
+
+It is not recommended to restore an old document state using snapshots,
+although that would certainly be possible. Instead, the old state should be
+computed by iterating through the newest state and using the additional
+information from the state vector.

examples/ace/index.html

@@ -1,32 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <style type="text/css" media="screen">
-    #aceContainer {
-        position: absolute;
-        top: 0;
-        right: 0;
-        bottom: 0;
-        left: 0;
-    }
-    .inserted {
-      position:absolute;
-      z-index:20;
-      background-color: #FFC107;
-    }
-    .deleted {
-      position:absolute;
-      z-index:20;
-      background-color: #FFC107;
-    }
-    </style>
-  </head>
-  <body>
-
-    <div id="aceContainer"></div>
-    <script src="../bower_components/yjs/y.js"></script>
-    <script src="../bower_components/ace-builds/src/ace.js"></script>
-
-    <script src="./index.js"></script>
-  </body>
-</html>

examples/ace/index.js

@@ -1,24 +0,0 @@
-/* global Y, ace */
-
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'ace-example'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    ace: 'Text' // y.share.textarea is of type Y.Text
-  }
-}).then(function (y) {
-  window.yAce = y
-
-  // bind the textarea to a shared text element
-  var editor = ace.edit('aceContainer')
-  editor.setTheme('ace/theme/chrome')
-  editor.getSession().setMode('ace/mode/javascript')
-
-  y.share.ace.bindAce(editor)
-})

examples/bower.json

@@ -1,19 +0,0 @@
-{
-  "name": "yjs-examples",
-  "version": "0.0.0",
-  "homepage": "y-js.org",
-  "authors": [
-    "Kevin Jahns <kevin.jahns@rwth-aachen.de>"
-  ],
-  "description": "Examples for Yjs",
-  "license": "MIT",
-  "ignore": [],
-  "dependencies": {
-    "quill": "^1.0.0-rc.2",
-    "ace": "~1.2.3",
-    "ace-builds": "~1.2.3",
-    "jquery": "~2.2.2",
-    "d3": "^3.5.16",
-    "codemirror": "^5.25.0"
-  }
-}

examples/chat/index.html

@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <body>
-    <style>
-      #chat p span {
-        color: blue;
-      }
-    </style>
-    <div id="chat"></div>
-    <form id="chatform">
-      <input name="username" type="text" style="width:15%;">
-      <input name="message" type="text" style="width:60%;">
-      <input type="submit" value="Send">
-    </form>
-    <script src="../../y.js"></script>
-    <script src="../../../y-websockets-client/dist/y-websockets-client.js"></script>
-    <script src="./index.js"></script>
-  </body>
-</html>

examples/chat/index.js

@@ -1,71 +0,0 @@
-/* global Y */
-
-// initialize a shared object. This function call returns a promise!
-var y = new Y({
-  connector: {
-    name: 'websockets-client',
-    room: 'chat-example'
-  }
-})
-
-window.yChat = y
-
-let chatprotocol = y.define('chatprotocol', Y.Array)
-
-let chatcontainer = document.querySelector('#chat')
-
-// This functions inserts a message at the specified position in the DOM
-function appendMessage (message, position) {
-  var p = document.createElement('p')
-  var uname = document.createElement('span')
-  uname.appendChild(document.createTextNode(message.username + ': '))
-  p.appendChild(uname)
-  p.appendChild(document.createTextNode(message.message))
-  chatcontainer.insertBefore(p, chatcontainer.children[position] || null)
-}
-// This function makes sure that only 7 messages exist in the chat history.
-// The rest is deleted
-function cleanupChat () {
-  if (chatprotocol.length > 7) {
-    chatprotocol.delete(0, chatprotocol.length - 7)
-  }
-}
-// Insert the initial content
-chatprotocol.toArray().forEach(appendMessage)
-cleanupChat()
-
-// whenever content changes, make sure to reflect the changes in the DOM
-chatprotocol.observe(function (event) {
-  if (event.type === 'insert') {
-    for (let i = 0; i < event.length; i++) {
-      appendMessage(event.values[i], event.index + i)
-    }
-  } else if (event.type === 'delete') {
-    for (let i = 0; i < event.length; i++) {
-      chatcontainer.children[event.index].remove()
-    }
-  }
-  // concurrent insertions may result in a history > 7, so cleanup here
-  cleanupChat()
-})
-document.querySelector('#chatform').onsubmit = function (event) {
-  // the form is submitted
-  var message = {
-    username: this.querySelector('[name=username]').value,
-    message: this.querySelector('[name=message]').value
-  }
-  if (message.username.length > 0 && message.message.length > 0) {
-    if (chatprotocol.length > 6) {
-      // If we are goint to insert the 8th element, make sure to delete first.
-      chatprotocol.delete(0)
-    }
-    // Here we insert a message in the shared chat type.
-    // This will call the observe function (see line 40)
-    // and reflect the change in the DOM
-    chatprotocol.push([message])
-    this.querySelector('[name=message]').value = ''
-  }
-  // Do not send this form!
-  event.preventDefault()
-  return false
-}

examples/codemirror/index.html

@@ -1,23 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-  </head>
-  <body>
-    <div id="codeMirrorContainer"></div>
-
-    <script src="../bower_components/yjs/y.js"></script>
-    <script src="../bower_components/codemirror/lib/codemirror.js"></script>
-    <script src="../bower_components/codemirror/mode/javascript/javascript.js"></script>
-    <link rel="stylesheet" href="../bower_components/codemirror/lib/codemirror.css">
-    <style>
-      .CodeMirror {
-        position: fixed;
-        top: 0;
-        left: 0;
-        height: 100%;
-        width: 100%;
-      }
-    </style>
-    <script src="./index.js"></script>
-  </body>
-</html>

examples/codemirror/index.js

@@ -1,24 +0,0 @@
-/* global Y, CodeMirror */
-
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'codemirror-example'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    codemirror: 'Text' // y.share.codemirror is of type Y.Text
-  }
-}).then(function (y) {
-  window.yCodeMirror = y
-
-  var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
-    mode: 'javascript',
-    lineNumbers: true
-  })
-  y.share.codemirror.bindCodeMirror(editor)
-})

examples/drawing/index.html

@@ -1,23 +0,0 @@
-<!DOCTYPE html>
-<html>
-<body>
-  <style>
-    path {
-      fill: none;
-      stroke: blue;
-      stroke-width: 1px;
-      stroke-linejoin: round;
-      stroke-linecap: round;
-    }
-  </style>
-  <button type="button" id="clearDrawingCanvas">Clear Drawing</button>
-  <svg id="drawingCanvas" viewbox="0 0 100 100" width="100%"></svg>
-  <script src="../../y.js"></script>
-  <script src="../../../y-array/y-array.js"></script>
-  <script src="../../../y-map/dist/y-map.js"></script>
-  <script src="../../../y-memory/y-memory.js"></script>
-  <script src="../../../y-websockets-client/y-websockets-client.js"></script>
-  <script src="../bower_components/d3/d3.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples/drawing/index.js

@@ -1,84 +0,0 @@
-/* globals Y, d3 */
-'strict mode'
-
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'drawing-example',
-    url: 'localhost:1234'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    drawing: 'Array'
-  }
-}).then(function (y) {
-  window.yDrawing = y
-  var drawing = y.share.drawing
-  var renderPath = d3.svg.line()
-    .x(function (d) { return d[0] })
-    .y(function (d) { return d[1] })
-    .interpolate('basis')
-
-  var svg = d3.select('#drawingCanvas')
-    .call(d3.behavior.drag()
-      .on('dragstart', dragstart)
-      .on('drag', drag)
-      .on('dragend', dragend))
-
-  // create line from a shared array object and update the line when the array changes
-  function drawLine (yarray) {
-    var line = svg.append('path').datum(yarray.toArray())
-    line.attr('d', renderPath)
-    yarray.observe(function (event) {
-      // we only implement insert events that are appended to the end of the array
-      event.values.forEach(function (value) {
-        line.datum().push(value)
-      })
-      line.attr('d', renderPath)
-    })
-  }
-  // call drawLine every time an array is appended
-  y.share.drawing.observe(function (event) {
-    if (event.type === 'insert') {
-      event.values.forEach(drawLine)
-    } else {
-      // just remove all elements (thats what we do anyway)
-      svg.selectAll('path').remove()
-    }
-  })
-  // draw all existing content
-  for (var i = 0; i < drawing.length; i++) {
-    drawLine(drawing.get(i))
-  }
-
-  // clear canvas on request
-  document.querySelector('#clearDrawingCanvas').onclick = function () {
-    drawing.delete(0, drawing.length)
-  }
-
-  var sharedLine = null
-  function dragstart () {
-    drawing.insert(drawing.length, [Y.Array])
-    sharedLine = drawing.get(drawing.length - 1)
-  }
-
-  // After one dragged event is recognized, we ignore them for 33ms.
-  var ignoreDrag = null
-  function drag () {
-    if (sharedLine != null && ignoreDrag == null) {
-      ignoreDrag = window.setTimeout(function () {
-        ignoreDrag = null
-      }, 33)
-      sharedLine.push([d3.mouse(this)])
-    }
-  }
-
-  function dragend () {
-    sharedLine = null
-    window.clearTimeout(ignoreDrag)
-    ignoreDrag = null
-  }
-})

examples/html-editor/index.html

@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html>
-</head>
-  <!-- jquery is not required for y-xml. It is just here for convenience, and to test batch operations. -->
-  <script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
-  <script src="../yjs-dist.js"></script>
-  <script src="./index.js"></script>
-</head>
-<body contenteditable="true">
-</body>
-</html>

examples/html-editor/index.js

@@ -1,43 +0,0 @@
-/* global Y, HTMLElement, customElements */
-
-class MagicTable extends HTMLElement {
-  constructor () {
-    super()
-    var shadow = this.attachShadow({mode: 'open'})
-    setTimeout(() => {
-      shadow.append(this.childNodes[0])
-    }, 1000)
-  }
-}
-customElements.define('magic-table', MagicTable)
-
-// initialize a shared object. This function call returns a promise!
-let y = new Y({
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234',
-    room: 'html-editor-example6'
-    // maxBufferLength: 100
-  }
-})
-window.yXml = y
-window.yXmlType = y.define('xml', Y.XmlFragment)
-window.onload = function () {
-  console.log('start!')
-  // Bind children of XmlFragment to the document.body
-  window.yXmlType.bindToDom(document.body)
-}
-window.undoManager = new Y.utils.UndoManager(window.yXmlType, {
-  captureTimeout: 500
-})
-
-document.onkeydown = function interceptUndoRedo (e) {
-  if (e.keyCode === 90 && e.metaKey) {
-    if (!e.shiftKey) {
-      window.undoManager.undo()
-    } else {
-      window.undoManager.redo()
-    }
-    e.preventDefault()
-  }
-}

examples/indexeddb/index.html

@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-  </head>
-  <body>
-    <div id="codeMirrorContainer"></div>
-    <script src="../bower_components/codemirror/lib/codemirror.js"></script>
-    <script src="../bower_components/codemirror/mode/javascript/javascript.js"></script>
-    <link rel="stylesheet" href="../bower_components/codemirror/lib/codemirror.css">
-    <style>
-      .CodeMirror {
-        position: fixed;
-        top: 0;
-        left: 0;
-        height: 100%;
-        width: 100%;
-      }
-    </style>
-    <script type="module" src="./index.js"></script>
-  </body>
-</html>

examples/indexeddb/index.js

@@ -1,24 +0,0 @@
-/* global Y, CodeMirror */
-
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'codemirror-example'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    codemirror: 'Text' // y.share.codemirror is of type Y.Text
-  }
-}).then(function (y) {
-  window.yCodeMirror = y
-
-  var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
-    mode: 'javascript',
-    lineNumbers: true
-  })
-  y.share.codemirror.bindCodeMirror(editor)
-})

examples/infiniteyjs/index.html

@@ -1,58 +0,0 @@
-<!DOCTYPE html>
-<html>
-<body>
-  <style>
-    .wrapper {
-      display: grid;
-      grid-template-columns: repeat(3, 1fr);
-      grid-gap: 7px;
-    }
-    .one {
-      grid-column: 1 ;
-    }
-    .two { 
-      grid-column: 2;
-    }
-    .three {
-      grid-column: 3;
-    }
-    textarea {
-      width: calc(100% - 10px)
-    }
-    .editor-container {
-      background-color: #4caf50;
-      padding: 4px 5px 10px 5px;
-      border-radius: 11px;
-    }
-    .editor-container[disconnected] {
-      background-color: red;
-    }
-    .disconnected-info {
-      display: none;
-    }
-    .editor-container[disconnected] .disconnected-info {
-      display: inline;
-    }
-  </style>
-  <div class="wrapper">
-    <div id="container1" class="one editor-container">
-      <h1>Server 1 <span class="disconnected-info">(disconnected)</span></h1>
-      <textarea id="textarea1" rows=40 autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"></textarea>
-    </div>
-    <div id="container2" class="two editor-container">
-      <h1>Server 2 <span class="disconnected-info">(disconnected)</span></h1>
-      <textarea id="textarea2" rows=40 autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"></textarea>
-    </div>
-    <div id="container3" class="three editor-container">
-      <h1>Server 3 <span class="disconnected-info">(disconnected)</span></h1>
-      <textarea id="textarea3" rows=40 autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"></textarea>
-    </div>
-  </div>
-  <script src="../../y.js"></script>
-  <script src="../../../y-array/y-array.js"></script>
-  <script src="../../../y-text/dist/y-text.js"></script>
-  <script src="../../../y-memory/y-memory.js"></script>
-  <script src="../../../y-websockets-client/y-websockets-client.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples/infiniteyjs/index.js

@@ -1,64 +0,0 @@
-/* global Y */
-
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'Textarea-example',
-    url: 'https://yjs-v13.herokuapp.com/'
-  },
-  share: {
-    textarea: 'Text'
-  }
-}).then(function (y) {
-  window.y1 = y
-  y.share.textarea.bind(document.getElementById('textarea1'))
-})
-
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'Textarea-example',
-    url: 'https://yjs-v13-second.herokuapp.com/'
-  },
-  share: {
-    textarea: 'Text'
-  }
-}).then(function (y) {
-  window.y2 = y
-  y.share.textarea.bind(document.getElementById('textarea2'))
-  y.connector.socket.on('connection', function () {
-    document.getElementById('container2').removeAttribute('disconnected')
-  })
-  y.connector.socket.on('disconnect', function () {
-    document.getElementById('container2').setAttribute('disconnected', true)
-  })
-})
-
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'Textarea-example',
-    url: 'https://yjs-v13-third.herokuapp.com/'
-  },
-  share: {
-    textarea: 'Text'
-  }
-}).then(function (y) {
-  window.y3 = y
-  y.share.textarea.bind(document.getElementById('textarea3'))
-  y.connector.socket.on('connection', function () {
-    document.getElementById('container3').removeAttribute('disconnected')
-  })
-  y.connector.socket.on('disconnect', function () {
-    document.getElementById('container3').setAttribute('disconnected', true)
-  })
-})

examples/jigsaw/index.html

@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <style type="text/css">
-    .draggable {
-      cursor: move;
-    }
-  </style>
-</head>
-<body>
-  <svg id="puzzle-example" width="100%" viewBox="0 0 800 800">
-    <g>
-      <path d="M 311.76636,154.23389 C 312.14136,171.85693 318.14087,184.97998 336.13843,184.23047 C 354.13647,183.48047 351.88647,180.48096 354.88599,178.98096 C 357.8855,177.48096 368.38452,170.35693 380.00806,169.98193 C 424.61841,168.54297 419.78296,223.6001 382.25757,223.6001 C 377.75806,223.6001 363.51001,219.10107 356.38599,211.97656 C 349.26196,204.85254 310.64185,207.10254 314.76636,236.34863 C 316.34888,247.5708 324.08374,267.90723 324.84595,286.23486 C 325.29321,296.99414 323.17603,307.00635 321.58911,315.6377 C 360.11353,305.4585 367.73462,304.30518 404.00513,312.83936 C 410.37915,314.33887 436.62573,310.21436 421.25269,290.3418 C 405.87964,270.46924 406.25464,248.34717 417.12817,240.84814 C 428.00171,233.34912 446.74976,228.84961 457.99829,234.09912 C 469.24683,239.34814 484.61987,255.84619 475.24585,271.59424 C 465.87231,287.34229 452.74878,290.7168 456.49829,303.84033 C 460.2478,316.96387 479.74536,320.33838 500.74292,321.83789 C 509.70142,322.47803 527.97192,323.28467 542.10864,320.12939 C 549.91821,318.38672 556.92212,315.89502 562.46753,313.56396 C 561.40796,277.80664 560.84888,245.71729 560.3606,241.97314 C 558.85278,230.41455 542.49536,217.28564 525.86499,223.2251 C 520.61548,225.1001 519.86548,231.84912 505.24243,232.59912 C 444.92798,235.69238 462.06958,143.26709 525.86499,180.48096 C 539.52759,188.45068 575.19409,190.7583 570.10913,156.85889 C 567.85962,141.86035 553.98608,102.86523 553.98608,102.86523 C 553.98608,102.86523 477.23755,111.82227 451.99878,91.991699 C 441.50024,83.74292 444.87476,69.494629 449.37427,61.245605 C 453.87378,52.996582 465.12231,46.622559 464.74731,36.123779 C 463.02563,-12.086426 392.96704,-10.902832 396.5061,36.873535 C 397.25562,46.997314 406.62964,52.621582 410.75415,60.495605 C 420.00757,78.161377 405.50024,96.073486 384.50757,99.490723 C 377.36206,100.65381 349.17505,102.65332 320.39429,102.23486 C 319.677,102.22461 318.95923,102.21143 318.24194,102.19775 C 315.08423,120.9751 311.55688,144.39697 311.76636,154.23389 z " style="fill:#f2c569;stroke:#000000" id="path2502"/>
-      <path d="M 500.74292,321.83789 C 479.74536,320.33838 460.2478,316.96387 456.49829,303.84033 C 452.74878,290.7168 465.87231,287.34229 475.24585,271.59424 C 484.61987,255.84619 469.24683,239.34814 457.99829,234.09912 C 446.74976,228.84961 428.00171,233.34912 417.12817,240.84814 C 406.25464,248.34717 405.87964,270.46924 421.25269,290.3418 C 436.62573,310.21436 410.37915,314.33887 404.00513,312.83936 C 367.73462,304.30518 360.11353,305.4585 321.58911,315.6377 C 320.56372,321.21484 319.75854,326.2207 320.01538,330.46191 C 320.76538,342.83545 329.3894,385.95508 327.8894,392.7041 C 326.3894,399.45312 313.64136,418.20117 297.89331,407.32715 C 282.14526,396.45361 276.52075,393.4541 265.27222,394.5791 C 254.02368,395.70361 239.77563,402.07812 239.77563,419.32568 C 239.77563,436.57373 250.27417,449.69727 268.64673,447.82227 C 287.36353,445.9126 317.92163,423.11035 325.63989,452.69678 C 330.1394,469.94434 330.51392,487.19238 330.1394,498.44092 C 329.95825,503.87646 326.09985,518.06592 322.16089,531.28125 C 353.2854,532.73682 386.47095,531.26611 394.2561,529.93701 C 430.30933,523.78174 429.31909,496.09766 412.62866,477.44385 C 406.25464,470.31934 401.75513,455.32129 405.87964,444.82275 C 414.07056,423.97314 458.8064,422.17773 473.37134,438.82324 C 483.86987,450.82178 475.99585,477.44385 468.49683,482.69287 C 453.52222,493.17529 457.22485,516.83008 473.37134,528.06201 C 504.79126,549.91943 572.35913,535.56152 572.35913,535.56152 C 572.35913,535.56152 567.85962,498.06592 567.48462,471.81934 C 567.10962,445.57275 589.60669,450.07227 593.3562,450.07227 C 597.10571,450.07227 604.22974,455.32129 609.47925,459.4458 C 614.72876,463.57031 618.85327,469.94434 630.85181,470.69434 C 677.43726,473.60596 674.58813,420.7373 631.97632,413.32666 C 623.35229,411.82666 614.72876,416.32617 603.10522,424.57519 C 591.48169,432.82422 577.23315,425.32519 570.10913,417.45117 C 566.07788,412.99561 563.8479,360.16406 562.46753,313.56396 C 556.92212,315.89502 549.91821,318.38672 542.10864,320.12939 C 527.97192,323.28467 509.70142,322.47803 500.74292,321.83789 z " style="fill:#f3f3d6;stroke:#000000" id="path2504"/>
-      <path d="M 240.52563,141.86035 C 257.60327,159.6499 243.94507,188.68799 214.65356,190.22949 C 185.09448,191.78516 164.66675,157.17822 190.28589,136.61621 C 200.49585,128.42139 198.05786,114.12158 179.78296,106.98975 C 154.4187,97.091553 90.54419,107.73975 90.54419,107.73975 C 90.54419,107.73975 100.88794,135.11328 101.41772,168.48242 C 101.79272,192.104 68.796875,189.47949 63.172607,186.85498 C 57.54834,184.23047 45.924805,173.73145 37.675781,173.73145 C -14.411865,173.73145 -10.013184,245.84375 39.925537,232.22412 C 48.174316,229.97461 56.42334,220.97559 68.796875,222.47559 C 81.17041,223.9751 87.544434,232.59912 87.544434,246.09766 C 87.544434,252.51709 87.0354,281.24268 86.340576,312.87012 C 119.15894,313.67676 160.60962,314.46582 170.03442,313.58887 C 186.15698,312.08936 195.90601,301.59033 188.40698,293.3418 C 180.90796,285.09277 156.16089,256.59619 179.03296,239.34814 C 201.90503,222.10059 235.65112,231.84912 239.77563,247.22217 C 243.90015,262.59521 240.52563,273.46924 234.90112,279.09326 C 229.27661,284.71777 210.52905,298.96582 221.40259,308.71484 C 232.27661,318.46338 263.77222,330.83691 302.39282,320.71338 C 309.58862,318.82715 315.92114,317.13525 321.58911,315.6377 C 323.17603,307.00635 325.29321,296.99414 324.84595,286.23486 C 324.08374,267.90723 316.34888,247.5708 314.76636,236.34863 C 310.64185,207.10254 349.26196,204.85254 356.38599,211.97656 C 363.51001,219.10107 377.75806,223.6001 382.25757,223.6001 C 419.78296,223.6001 424.61841,168.54297 380.00806,169.98193 C 368.38452,170.35693 357.8855,177.48096 354.88599,178.98096 C 351.88647,180.48096 354.13647,183.48047 336.13843,184.23047 C 318.14087,184.97998 312.14136,171.85693 311.76636,154.23389 C 311.55688,144.39697 315.08423,120.9751 318.24194,102.19775 C 290.37524,101.67725 262.46069,98.968262 254.39868,97.991211 C 233.38013,95.443359 217.17456,117.53662 240.52563,141.86035 z " style="fill:#bebcdb;stroke:#000000" id="path2506"/>
-      <path d="M 325.63989,452.69678 C 317.92163,423.11035 287.36353,445.9126 268.64673,447.82227 C 250.27417,449.69727 239.77563,436.57373 239.77563,419.32568 C 239.77563,402.07812 254.02368,395.70361 265.27222,394.5791 C 276.52075,393.4541 282.14526,396.45361 297.89331,407.32715 C 313.64136,418.20117 326.3894,399.45313 327.8894,392.7041 C 329.3894,385.95508 320.76538,342.83545 320.01538,330.46191 C 319.75855,326.2207 320.56372,321.21484 321.58911,315.6377 C 315.92114,317.13525 309.58862,318.82715 302.39282,320.71338 C 263.77222,330.83691 232.27661,318.46338 221.40259,308.71484 C 210.52905,298.96582 229.27661,284.71777 234.90112,279.09326 C 240.52563,273.46924 243.90015,262.59521 239.77563,247.22217 C 235.65112,231.84912 201.90503,222.10059 179.03296,239.34814 C 156.16089,256.59619 180.90796,285.09277 188.40698,293.3418 C 195.90601,301.59033 186.15698,312.08936 170.03442,313.58887 C 160.60962,314.46582 119.15894,313.67676 86.340576,312.87012 C 85.573975,347.74561 84.581299,386.15088 83.794922,402.07812 C 82.295166,432.44922 109.29175,422.32568 115.66577,420.82568 C 122.04028,419.32568 126.16479,409.57715 143.03735,408.45215 C 185.9231,405.59326 186.09985,466.69629 144.16235,467.69482 C 128.41431,468.06982 113.79126,451.19678 108.16675,447.44727 C 102.54272,443.69775 87.919433,442.94775 83.794922,457.9458 C 82.01709,464.41113 78.118652,481.65137 78.098144,496.18994 C 78.071045,515.38037 82.295166,531.81201 82.295166,531.81201 C 82.295166,531.81201 105.54224,526.5625 149.41187,526.5625 C 193.28149,526.5625 199.65552,547.93506 194.78101,558.80859 C 189.90649,569.68213 181.28296,568.93213 179.40796,583.18066 C 172.7063,634.11133 253.34106,631.08203 249.14917,584.68018 C 247.96948,571.62354 237.16528,571.66699 232.27661,557.68359 C 222.17944,528.80273 244.64966,523.56299 257.39819,524.68799 C 263.59351,525.23437 290.95679,529.73389 320.75757,531.21582 C 321.22437,531.23877 321.69312,531.25928 322.16089,531.28125 C 326.09985,518.06592 329.95825,503.87646 330.1394,498.44092 C 330.51392,487.19238 330.1394,469.94434 325.63989,452.69678 z " style="fill:#d3ea9d;stroke:#000000" id="path2508"/>
-		</g>
-  </svg>
-  <script src="../../y.js"></script>
-  <script src="../../../y-map/dist/y-map.js"></script>
-  <script src="../../../y-memory/y-memory.js"></script>
-  <script src="../../../y-websockets-client/y-websockets-client.js"></script>
-  <script src="../bower_components/d3/d3.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples/jigsaw/index.js

@@ -1,74 +0,0 @@
-/* @flow */
-/* global Y, d3 */
-
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'Puzzle-example',
-    url: 'http://localhost:1234'
-  },
-  share: {
-    piece1: 'Map',
-    piece2: 'Map',
-    piece3: 'Map',
-    piece4: 'Map'
-  }
-}).then(function (y) {
-  window.yJigsaw = y
-  var origin // mouse start position - translation of piece
-  var drag = d3.behavior.drag()
-    .on('dragstart', function (params) {
-      // get the translation of the element
-      var translation = d3
-        .select(this)
-        .attr('transform')
-        .slice(10, -1)
-        .split(',')
-        .map(Number)
-      // mouse coordinates
-      var mouse = d3.mouse(this.parentNode)
-      origin = {
-        x: mouse[0] - translation[0],
-        y: mouse[1] - translation[1]
-      }
-    })
-    .on('drag', function () {
-      var mouse = d3.mouse(this.parentNode)
-      var x = mouse[0] - origin.x // =^= mouse - mouse at dragstart + translation at dragstart
-      var y = mouse[1] - origin.y
-      d3.select(this).attr('transform', 'translate(' + x + ',' + y + ')')
-    })
-    .on('dragend', function (piece, i) {
-      // save the current translation of the puzzle piece
-      var mouse = d3.mouse(this.parentNode)
-      var x = mouse[0] - origin.x
-      var y = mouse[1] - origin.y
-      piece.set('translation', {x: x, y: y})
-    })
-
-  var data = [y.share.piece1, y.share.piece2, y.share.piece3, y.share.piece4]
-  var pieces = d3.select(document.querySelector('#puzzle-example')).selectAll('path').data(data)
-
-  pieces
-    .classed('draggable', true)
-    .attr('transform', function (piece) {
-      var translation = piece.get('translation') || {x: 0, y: 0}
-      return 'translate(' + translation.x + ',' + translation.y + ')'
-    }).call(drag)
-
-  data.forEach(function (piece) {
-    piece.observe(function () {
-      // whenever a property of a piece changes, update the translation of the pieces
-      pieces
-        .transition()
-        .attr('transform', function (piece) {
-          var translation = piece.get('translation') || {x: 0, y: 0}
-          return 'translate(' + translation.x + ',' + translation.y + ')'
-        })
-    })
-  })
-})

examples/monaco/index.html

@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-  </head>
-  <body>
-    <div id="monacoContainer"></div>
-    <style>
-      #monacoContainer {
-        position: fixed;
-        top: 0;
-        left: 0;
-        height: 100%;
-        width: 100%;
-      }
-    </style>
-    <script src="../bower_components/yjs/y.js"></script>
-    <script src="../bower_components/y-websockets-client/y-websockets-client.js"></script>
-    <script src="../node_modules/monaco-editor/min/vs/loader.js"></script>
-    <script src="./index.js"></script>
-  </body>
-</html>

examples/monaco/index.js

@@ -1,30 +0,0 @@
-/* global Y, monaco */
-
-require.config({ paths: { 'vs': '../node_modules/monaco-editor/min/vs' } })
-
-require(['vs/editor/editor.main'], function () {
-  // Initialize a shared object. This function call returns a promise!
-  Y({
-    db: {
-      name: 'memory'
-    },
-    connector: {
-      name: 'websockets-client',
-      room: 'monaco-example'
-    },
-    sourceDir: '/bower_components',
-    share: {
-      monaco: 'Text' // y.share.monaco is of type Y.Text
-    }
-  }).then(function (y) {
-    window.yMonaco = y
-
-    // Create Monaco editor
-    var editor = monaco.editor.create(document.getElementById('monacoContainer'), {
-      language: 'javascript'
-    })
-
-    // Bind to y.share.monaco
-    y.share.monaco.bindMonaco(editor)
-  })
-})

examples/package.json

@@ -1,20 +0,0 @@
-{
-  "name": "examples",
-  "version": "0.0.0",
-  "description": "",
-  "scripts": {
-    "dist": "rollup -c",
-    "watch": "rollup -cw"
-  },
-  "author": "Kevin Jahns",
-  "license": "MIT",
-  "dependencies": {
-    "monaco-editor": "^0.8.3"
-  },
-  "devDependencies": {
-    "standard": "^10.0.2"
-  },
-  "standard": {
-    "ignore": ["bower_components"]
-  }
-}

examples/quill/index.html

@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <!-- quill does not include dist files! We are using the hosted version instead -->
-  <!--link rel="stylesheet" href="../bower_components/quill/dist/quill.snow.css" /-->
-  <link href="https://cdn.quilljs.com/1.0.4/quill.snow.css" rel="stylesheet">
-  <link href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.css" rel="stylesheet">
-  <link href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai-sublime.min.css" rel="stylesheet">
-  <style>
-    #quill-container {
-      border: 1px solid gray;
-      box-shadow: 0px 0px 10px gray;
-    }
-  </style>
-</head>
-<body>
-  <div id="quill-container">
-    <div id="quill">
-    </div>
-  </div>
-
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.js" type="text/javascript"></script>
-  <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/highlight.min.js" type="text/javascript"></script>
-  <script src="https://cdn.quilljs.com/1.0.4/quill.js"></script>
-  <!-- quill does not include dist files! We are using the hosted version instead (see above)
-  <script src="../bower_components/quill/dist/quill.js"></script>
-  -->
-  <script src="../../y.js"></script>
-  <script src="../../../y-array/y-array.js"></script>
-  <script src="../../../y-richtext/dist/y-richtext.js"></script>
-  <script src="../../../y-memory/y-memory.js"></script>
-  <script src="../../../y-websockets-client/y-websockets-client.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples/quill/index.js

@@ -1,40 +0,0 @@
-/* global Y, Quill */
-
-// initialize a shared object. This function call returns a promise!
-
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'richtext-example-quill-1.0-test',
-    url: 'http://localhost:1234'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    richtext: 'Richtext' // y.share.richtext is of type Y.Richtext
-  }
-}).then(function (y) {
-  window.yQuill = y
-
-  // create quill element
-  window.quill = new Quill('#quill', {
-    modules: {
-      formula: true,
-      syntax: true,
-      toolbar: [
-        [{ size: ['small', false, 'large', 'huge'] }],
-        ['bold', 'italic', 'underline'],
-        [{ color: [] }, { background: [] }],    // Snow theme fills in values
-        [{ script: 'sub' }, { script: 'super' }],
-        ['link', 'image'],
-        ['link', 'code-block'],
-        [{ list: 'ordered' }]
-      ]
-    },
-    theme: 'snow'
-  })
-  // bind quill to richtext type
-  y.share.richtext.bind(window.quill)
-})

examples/rollup.config.js

@@ -1,27 +0,0 @@
-import nodeResolve from 'rollup-plugin-node-resolve'
-import commonjs from 'rollup-plugin-commonjs'
-
-var pkg = require('./package.json')
-
-export default {
-  entry: 'yjs-dist.esm',
-  dest: 'yjs-dist.js',
-  moduleName: 'Y',
-  format: 'umd',
-  plugins: [
-    nodeResolve({
-      main: true,
-      module: true,
-      browser: true
-    }),
-    commonjs()
-  ],
-  sourceMap: true,
-  banner: `
-/**
- * ${pkg.name} - ${pkg.description}
- * @version v${pkg.version}
- * @license ${pkg.license}
- */
-`
-}

examples/serviceworker/index.html

@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <!-- quill does not include dist files! We are using the hosted version instead -->
-  <!--link rel="stylesheet" href="../bower_components/quill/dist/quill.snow.css" /-->
-  <link href="https://cdn.quilljs.com/1.0.4/quill.snow.css" rel="stylesheet">
-  <link href="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.css" rel="stylesheet">
-  <link href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/styles/monokai-sublime.min.css" rel="stylesheet">
-  <style>
-    #quill-container {
-      border: 1px solid gray;
-      box-shadow: 0px 0px 10px gray;
-    }
-  </style>
-</head>
-<body>
-  <div id="quill-container">
-    <div id="quill">
-    </div>
-  </div>
-
-  <script src="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.js" type="text/javascript"></script>
-  <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.2.0/highlight.min.js" type="text/javascript"></script>
-  <script src="https://cdn.quilljs.com/1.0.4/quill.js"></script>
-  <!-- quill does not include dist files! We are using the hosted version instead (see above)
-  <script src="../bower_components/quill/dist/quill.js"></script>
-  -->
-  <script src="../bower_components/yjs/y.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples/serviceworker/index.js

@@ -1,49 +0,0 @@
-/* global Y, Quill */
-
-// register yjs service worker
-if ('serviceWorker' in navigator) {
-  // Register service worker
-  // it is important to copy yjs-sw-template to the root directory!
-  navigator.serviceWorker.register('./yjs-sw-template.js').then(function (reg) {
-    console.log('Yjs service worker registration succeeded. Scope is ' + reg.scope)
-  }).catch(function (err) {
-    console.error('Yjs service worker registration failed with error ' + err)
-  })
-}
-
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'serviceworker',
-    room: 'ServiceWorkerExample2'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    richtext: 'Richtext' // y.share.richtext is of type Y.Richtext
-  }
-}).then(function (y) {
-  window.yServiceWorker = y
-
-  // create quill element
-  window.quill = new Quill('#quill', {
-    modules: {
-      formula: true,
-      syntax: true,
-      toolbar: [
-        [{ size: ['small', false, 'large', 'huge'] }],
-        ['bold', 'italic', 'underline'],
-        [{ color: [] }, { background: [] }],    // Snow theme fills in values
-        [{ script: 'sub' }, { script: 'super' }],
-        ['link', 'image'],
-        ['link', 'code-block'],
-        [{ list: 'ordered' }]
-      ]
-    },
-    theme: 'snow'
-  })
-  // bind quill to richtext type
-  y.share.richtext.bind(window.quill)
-})

examples/serviceworker/yjs-sw-template.js

@@ -1,22 +0,0 @@
-/* eslint-env worker */
-
-// copy and modify this file
-
-self.DBConfig = {
-  name: 'indexeddb'
-}
-self.ConnectorConfig = {
-  name: 'websockets-client',
-  // url: '..',
-  options: {
-    jsonp: false
-  }
-}
-
-importScripts(
-  '/bower_components/yjs/y.js',
-  '/bower_components/y-memory/y-memory.js',
-  '/bower_components/y-indexeddb/y-indexeddb.js',
-  '/bower_components/y-websockets-client/y-websockets-client.js',
-  '/bower_components/y-serviceworker/yjs-sw-include.js'
-)

examples/textarea/index.html

@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html>
-<body>
-  <textarea style="width:80%;" rows=40 id="textfield" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"></textarea>
-  <script src="../../y.js"></script>
-  <script src="../../../y-array/y-array.js"></script>
-  <script src="../../../y-text/y-text.js"></script>
-  <script src="../../../y-websockets-client/y-websockets-client.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples/textarea/index.js

@@ -1,23 +0,0 @@
-/* global Y */
-
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    room: 'Textarea-example2',
-    // url: '//localhost:1234',
-    url: 'https://yjs-v13.herokuapp.com/'
-  },
-  share: {
-    textarea: 'Text'
-  },
-  timeout: 5000 // reject if no connection was established within 5 seconds
-}).then(function (y) {
-  window.yTextarea = y
-
-  // bind the textarea to a shared text element
-  y.share.textarea.bind(document.getElementById('textfield'))
-})

examples/xml/index.html

@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html>
-</head>
-  <!-- jquery is not required for y-xml. It is just here for convenience, and to test batch operations. -->
-  <script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
-  <script src="../yjs-dist.js"></script>
-  <script src="./index.js"></script>
-</head>
-<body>
-  <h1> Shared DOM Example </h1>
-  <p> Use native DOM function or jQuery to manipulate the shared DOM (window.sharedDom). </p>
-  <div class="command">
-    <button type="button">Execute</button>
-    <input type="text" value='$(sharedDom).append("<h3>Appended headline</h3>")' size="40"/>
-  </div>
-  <div class="command">
-    <button type="button">Execute</button>
-    <input type="text" value='$(sharedDom).attr("align","right")' size="40"/>
-  </div>
-  <div class="command">
-    <button type="button">Execute</button>
-    <input type="text" value='$(sharedDom).attr("style","color:blue;")' size="40"/>
-  </div>
-
-  <script>
-    var commands = document.querySelectorAll(".command");
-    Array.prototype.forEach.call(document.querySelectorAll('.command'), function (command) {
-      var execute = function(){
-        eval(command.querySelector("input").value);
-      }
-      command.querySelector("button").onclick = execute
-      $(command.querySelector("input")).keyup(function (e) {
-        if (e.keyCode == 13) {
-          execute()
-        }
-      })
-    })
-  </script>
-</body>
-</html>

examples/xml/index.js

@@ -1,23 +0,0 @@
-/* global Y */
-
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
-  connector: {
-    name: 'websockets-client',
-    // url: 'http://127.0.0.1:1234',
-    url: 'http://192.168.178.81:1234',
-    room: 'Xml-example'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    xml: 'Xml("p")' // y.share.xml is of type Y.Xml with tagname "p"
-  }
-}).then(function (y) {
-  window.yXml = y
-  // bind xml type to a dom, and put it in body
-  window.sharedDom = y.share.xml.getDom()
-  document.body.appendChild(window.sharedDom)
-})

examples/yjs-dist.esm

@@ -1,7 +0,0 @@
-
-import Y from '../src/Y.js'
-import yWebsocketsClient from '../../y-websockets-client/src/y-websockets-client.js'
-
-Y.extend(yWebsocketsClient)
-
-export default Y

package.json

@@ -1,73 +1,98 @@
 {
   "name": "yjs",
-  "version": "13.0.0-34",
+  "version": "13.6.1",
-  "description": "A framework for real-time p2p shared editing on any data",
+  "description": "Shared Editing Library",
-  "main": "./y.node.js",
+  "main": "./dist/yjs.cjs",
-  "browser": "./y.js",
+  "module": "./dist/yjs.mjs",
-  "module": "./src/y.js",
+  "types": "./dist/src/index.d.ts",
+  "type": "module",
+  "sideEffects": false,
+  "funding": {
+    "type": "GitHub Sponsors ❤",
+    "url": "https://github.com/sponsors/dmonad"
+  },
   "scripts": {
-    "test": "npm run lint",
+    "test": "npm run dist && node ./dist/tests.cjs --repetition-time 50",
-    "debug": "concurrently 'rollup -wc rollup.test.js' 'cutest-serve y.test.js -o'",
+    "test-extensive": "npm run lint && npm run dist && node ./dist/tests.cjs --production --repetition-time 10000",
-    "lint": "standard",
+    "dist": "rm -rf dist && rollup -c && tsc",
-    "dist": "rollup -c rollup.browser.js; rollup -c rollup.node.js",
+    "watch": "rollup -wc",
-    "watch": "concurrently 'rollup -wc rollup.browser.js' 'rollup -wc rollup.node.js'",
+    "lint": "markdownlint README.md && standard && tsc",
-    "postversion": "npm run dist",
+    "docs": "rm -rf docs; jsdoc --configure ./.jsdoc.json --verbose --readme ./README.md --package ./package.json || true",
-    "postpublish": "tag-dist-files --overwrite-existing-tag"
+    "serve-docs": "npm run docs && http-server ./docs/",
+    "preversion": "npm run lint && PRODUCTION=1 npm run dist && npm run docs && node ./dist/tests.cjs --repetition-time 1000 && test -e dist/src/index.d.ts && test -e dist/yjs.cjs && test -e dist/yjs.cjs",
+    "debug": "concurrently 'http-server -o test.html' 'npm run watch'",
+    "trace-deopt": "clear && rollup -c  && node --trace-deopt dist/test.cjs",
+    "trace-opt": "clear && rollup -c  && node --trace-opt dist/test.cjs"
+  },
+  "exports": {
+    ".": {
+      "types": "./dist/src/index.d.ts",
+      "module": "./dist/yjs.mjs",
+      "import": "./dist/yjs.mjs",
+      "require": "./dist/yjs.cjs"
+    },
+    "./src/index.js": "./src/index.js",
+    "./tests/testHelper.js": "./tests/testHelper.js",
+    "./testHelper": "./dist/testHelper.mjs",
+    "./package.json": "./package.json"
   },
   "files": [
-    "y.*",
+    "dist/yjs.*",
-    "src/*"
+    "dist/src",
+    "src",
+    "tests/testHelper.js",
+    "dist/testHelper.mjs",
+    "sponsor-y.js"
   ],
+  "dictionaries": {
+    "test": "tests"
+  },
   "standard": {
     "ignore": [
-      "/y.js",
+      "/dist",
-      "/y.js.map"
+      "/node_modules",
+      "/docs"
     ]
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/y-js/yjs.git"
+    "url": "https://github.com/yjs/yjs.git"
   },
   "keywords": [
     "Yjs",
-    "OT",
+    "CRDT",
-    "Collaboration",
+    "offline",
-    "Synchronization",
+    "offline-first",
-    "ShareJS",
+    "shared-editing",
-    "Coweb",
+    "concurrency",
-    "Concurrency"
+    "collaboration"
   ],
   "author": "Kevin Jahns",
-  "email": "kevin.jahns@rwth-aachen.de",
+  "email": "kevin.jahns@protonmail.com",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/y-js/yjs/issues"
+    "url": "https://github.com/yjs/yjs/issues"
-  },
-  "homepage": "http://y-js.org",
-  "devDependencies": {
-    "babel-cli": "^6.24.1",
-    "babel-plugin-external-helpers": "^6.22.0",
-    "babel-plugin-transform-regenerator": "^6.24.1",
-    "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-latest": "^6.24.1",
-    "chance": "^1.0.9",
-    "concurrently": "^3.4.0",
-    "cutest": "^0.1.9",
-    "rollup-plugin-babel": "^2.7.1",
-    "rollup-plugin-commonjs": "^8.0.2",
-    "rollup-plugin-inject": "^2.0.0",
-    "rollup-plugin-multi-entry": "^2.0.1",
-    "rollup-plugin-node-resolve": "^3.0.0",
-    "rollup-plugin-uglify": "^1.0.2",
-    "rollup-regenerator-runtime": "^6.23.1",
-    "rollup-watch": "^3.2.2",
-    "standard": "^10.0.2",
-    "tag-dist-files": "^0.1.6"
   },
+  "homepage": "https://docs.yjs.dev",
   "dependencies": {
-    "debug": "^2.6.8",
+    "lib0": "^0.2.74"
-    "fast-diff": "^1.1.2",
+  },
-    "utf-8": "^1.0.0",
+  "devDependencies": {
-    "utf8": "^2.1.2"
+    "@rollup/plugin-commonjs": "^24.0.1",
+    "@rollup/plugin-node-resolve": "^15.0.1",
+    "@types/node": "^18.15.5",
+    "concurrently": "^3.6.1",
+    "http-server": "^0.12.3",
+    "jsdoc": "^3.6.7",
+    "markdownlint-cli": "^0.23.2",
+    "rollup": "^3.20.0",
+    "standard": "^16.0.4",
+    "tui-jsdoc-template": "^1.2.2",
+    "typescript": "^4.9.5",
+    "y-protocols": "^1.0.5"
+  },
+  "engines": {
+    "npm": ">=8.0.0",
+    "node": ">=16.0.0"
   }
 }

rollup.browser.js

@@ -1,46 +0,0 @@
-import babel from 'rollup-plugin-babel'
-import uglify from 'rollup-plugin-uglify'
-import nodeResolve from 'rollup-plugin-node-resolve'
-import commonjs from 'rollup-plugin-commonjs'
-var pkg = require('./package.json')
-
-export default {
-  input: 'src/Y.js',
-  name: 'Y',
-  sourcemap: true,
-  output: {
-    file: 'y.js',
-    format: 'umd'
-  },
-  plugins: [
-    nodeResolve({
-      main: true,
-      module: true,
-      browser: true
-    }),
-    commonjs(),
-    babel(),
-    uglify({
-      mangle: {
-        except: ['YMap', 'Y', 'YArray', 'YText', 'YXmlFragment', 'YXmlElement', 'YXmlEvent', 'YXmlText', 'YEvent', 'YArrayEvent', 'YMapEvent', 'Type', 'Delete', 'ItemJSON', 'ItemString', 'Item']
-      },
-      output: {
-        comments: function (node, comment) {
-          var text = comment.value
-          var type = comment.type
-          if (type === 'comment2') {
-            // multiline comment
-            return /@license/i.test(text)
-          }
-        }
-      }
-    })
-  ],
-  banner: `
-/**
- * ${pkg.name} - ${pkg.description}
- * @version v${pkg.version}
- * @license ${pkg.license}
- */
-`
-}

rollup.config.js

@@ -0,0 +1,106 @@
+import nodeResolve from '@rollup/plugin-node-resolve'
+import commonjs from '@rollup/plugin-commonjs'
+
+const localImports = process.env.LOCALIMPORTS
+
+const customModules = new Set([
+  'y-websocket',
+  'y-codemirror',
+  'y-ace',
+  'y-textarea',
+  'y-quill',
+  'y-dom',
+  'y-prosemirror'
+])
+/**
+ * @type {Set<any>}
+ */
+const customLibModules = new Set([
+  'lib0',
+  'y-protocols'
+])
+const debugResolve = {
+  resolveId (importee) {
+    if (importee === 'yjs') {
+      return `${process.cwd()}/src/index.js`
+    }
+    if (localImports) {
+      if (customModules.has(importee.split('/')[0])) {
+        return `${process.cwd()}/../${importee}/src/${importee}.js`
+      }
+      if (customLibModules.has(importee.split('/')[0])) {
+        return `${process.cwd()}/../${importee}`
+      }
+    }
+    return null
+  }
+}
+
+export default [{
+  input: './src/index.js',
+  output: {
+    name: 'Y',
+    file: 'dist/yjs.cjs',
+    format: 'cjs',
+    sourcemap: true
+  },
+  external: id => /^lib0\//.test(id)
+}, {
+  input: './src/index.js',
+  output: {
+    name: 'Y',
+    file: 'dist/yjs.mjs',
+    format: 'esm',
+    sourcemap: true
+  },
+  external: id => /^lib0\//.test(id)
+}, {
+  input: './tests/testHelper.js',
+  output: {
+    name: 'Y',
+    file: 'dist/testHelper.mjs',
+    format: 'esm',
+    sourcemap: true
+  },
+  external: id => /^lib0\//.test(id) || id === 'yjs',
+  plugins: [{
+    resolveId (importee) {
+      if (importee === '../src/index.js') {
+        return 'yjs'
+      }
+      return null
+    }
+  }]
+}, {
+  input: './tests/index.js',
+  output: {
+    name: 'test',
+    file: 'dist/tests.js',
+    format: 'iife',
+    sourcemap: true
+  },
+  plugins: [
+    debugResolve,
+    nodeResolve({
+      mainFields: ['browser', 'module', 'main']
+    }),
+    commonjs()
+  ]
+}, {
+  input: './tests/index.js',
+  output: {
+    name: 'test',
+    file: 'dist/tests.cjs',
+    format: 'cjs',
+    sourcemap: true
+  },
+  plugins: [
+    debugResolve,
+    nodeResolve({
+      mainFields: ['node', 'module', 'main'],
+      exportConditions: ['node', 'module', 'import', 'default']
+    }),
+    commonjs()
+  ],
+  external: id => /^lib0\//.test(id)
+}]

rollup.node.js

@@ -1,28 +0,0 @@
-import nodeResolve from 'rollup-plugin-node-resolve'
-import commonjs from 'rollup-plugin-commonjs'
-var pkg = require('./package.json')
-
-export default {
-  input: 'src/y-dist.cjs.js',
-  nameame: 'Y',
-  sourcemap: true,
-  output: {
-    file: 'y.node.js',
-    format: 'cjs'
-  },
-  plugins: [
-    nodeResolve({
-      main: true,
-      module: true,
-      browser: true
-    }),
-    commonjs()
-  ],
-  banner: `
-/**
- * ${pkg.name} - ${pkg.description}
- * @version v${pkg.version}
- * @license ${pkg.license}
- */
-`
-}

rollup.test.js

@@ -1,22 +0,0 @@
-import nodeResolve from 'rollup-plugin-node-resolve'
-import commonjs from 'rollup-plugin-commonjs'
-import multiEntry from 'rollup-plugin-multi-entry'
-
-export default {
-  input: 'test/y-xml.tests.js',
-  name: 'y-tests',
-  sourcemap: true,
-  output: {
-    file: 'y.test.js',
-    format: 'umd'
-  },
-  plugins: [
-    nodeResolve({
-      main: true,
-      module: true,
-      browser: true
-    }),
-    commonjs(),
-    multiEntry()
-  ]
-}

src/Binary/Decoder.js

@@ -1,120 +0,0 @@
-import utf8 from 'utf-8'
-import ID from '../Util/ID.js'
-import { default as RootID, RootFakeUserID } from '../Util/RootID.js'
-
-export default class BinaryDecoder {
-  constructor (buffer) {
-    if (buffer instanceof ArrayBuffer) {
-      this.uint8arr = new Uint8Array(buffer)
-    } else if (buffer instanceof Uint8Array || (typeof Buffer !== 'undefined' && buffer instanceof Buffer)) {
-      this.uint8arr = buffer
-    } else {
-      throw new Error('Expected an ArrayBuffer or Uint8Array!')
-    }
-    this.pos = 0
-  }
-  /**
-   * Clone this decoder instance
-   * Optionally set a new position parameter
-   */
-  clone (newPos = this.pos) {
-    let decoder = new BinaryDecoder(this.uint8arr)
-    decoder.pos = newPos
-    return decoder
-  }
-  /**
-   * Number of bytes
-   */
-  get length () {
-    return this.uint8arr.length
-  }
-  /**
-   * Skip one byte, jump to the next position
-   */
-  skip8 () {
-    this.pos++
-  }
-  /**
-   * Read one byte as unsigned integer
-   */
-  readUint8 () {
-    return this.uint8arr[this.pos++]
-  }
-  /**
-   * Read 4 bytes as unsigned integer
-   */
-  readUint32 () {
-    let uint =
-      this.uint8arr[this.pos] +
-      (this.uint8arr[this.pos + 1] << 8) +
-      (this.uint8arr[this.pos + 2] << 16) +
-      (this.uint8arr[this.pos + 3] << 24)
-    this.pos += 4
-    return uint
-  }
-  /**
-   * Look ahead without incrementing position
-   * to the next byte and read it as unsigned integer
-   */
-  peekUint8 () {
-    return this.uint8arr[this.pos]
-  }
-  /**
-   * Read unsigned integer (32bit) with variable length
-   * 1/8th of the storage is used as encoding overhead
-   *  - numbers < 2^7 is stored in one byte
-   *  - numbers < 2^14 is stored in two bytes
-   *  ..
-   */
-  readVarUint () {
-    let num = 0
-    let len = 0
-    while (true) {
-      let r = this.uint8arr[this.pos++]
-      num = num | ((r & 0b1111111) << len)
-      len += 7
-      if (r < 1 << 7) {
-        return num >>> 0 // return unsigned number!
-      }
-      if (len > 35) {
-        throw new Error('Integer out of range!')
-      }
-    }
-  }
-  /**
-   * Read string of variable length
-   * - varUint is used to store the length of the string
-   */
-  readVarString () {
-    let len = this.readVarUint()
-    let bytes = new Array(len)
-    for (let i = 0; i < len; i++) {
-      bytes[i] = this.uint8arr[this.pos++]
-    }
-    return utf8.getStringFromBytes(bytes)
-  }
-  /**
-   *  Look ahead and read varString without incrementing position
-   */
-  peekVarString () {
-    let pos = this.pos
-    let s = this.readVarString()
-    this.pos = pos
-    return s
-  }
-  /**
-   * Read ID
-   * - If first varUint read is 0xFFFFFF a RootID is returned
-   * - Otherwise an ID is returned
-   */
-  readID () {
-    let user = this.readVarUint()
-    if (user === RootFakeUserID) {
-      // read property name and type id
-      const rid = new RootID(this.readVarString(), null)
-      rid.type = this.readVarUint()
-      return rid
-    }
-    return new ID(user, this.readVarUint())
-  }
-}

src/Binary/Encoder.js

@@ -1,83 +0,0 @@
-import utf8 from 'utf-8'
-import { RootFakeUserID } from '../Util/RootID.js'
-
-const bits7 = 0b1111111
-const bits8 = 0b11111111
-
-export default class BinaryEncoder {
-  constructor () {
-    // TODO: implement chained Uint8Array buffers instead of Array buffer
-    this.data = []
-  }
-
-  get length () {
-    return this.data.length
-  }
-
-  get pos () {
-    return this.data.length
-  }
-
-  createBuffer () {
-    return Uint8Array.from(this.data).buffer
-  }
-
-  writeUint8 (num) {
-    this.data.push(num & bits8)
-  }
-
-  setUint8 (pos, num) {
-    this.data[pos] = num & bits8
-  }
-
-  writeUint16 (num) {
-    this.data.push(num & bits8, (num >>> 8) & bits8)
-  }
-
-  setUint16 (pos, num) {
-    this.data[pos] = num & bits8
-    this.data[pos + 1] = (num >>> 8) & bits8
-  }
-
-  writeUint32 (num) {
-    for (let i = 0; i < 4; i++) {
-      this.data.push(num & bits8)
-      num >>>= 8
-    }
-  }
-
-  setUint32 (pos, num) {
-    for (let i = 0; i < 4; i++) {
-      this.data[pos + i] = num & bits8
-      num >>>= 8
-    }
-  }
-
-  writeVarUint (num) {
-    while (num >= 0b10000000) {
-      this.data.push(0b10000000 | (bits7 & num))
-      num >>>= 7
-    }
-    this.data.push(bits7 & num)
-  }
-
-  writeVarString (str) {
-    let bytes = utf8.setBytesFromString(str)
-    let len = bytes.length
-    this.writeVarUint(len)
-    for (let i = 0; i < len; i++) {
-      this.data.push(bytes[i])
-    }
-  }
-
-  writeID (id) {
-    const user = id.user
-    this.writeVarUint(user)
-    if (user !== RootFakeUserID) {
-      this.writeVarUint(id.clock)
-    } else {
-      this.writeVarString(id.name)
-      this.writeVarUint(id.type)
-    }
-  }
-}

src/Connector.js

@@ -1,294 +0,0 @@
-import BinaryEncoder from './Binary/Encoder.js'
-import BinaryDecoder from './Binary/Decoder.js'
-
-import { sendSyncStep1, readSyncStep1 } from './MessageHandler/syncStep1.js'
-import { readSyncStep2 } from './MessageHandler/syncStep2.js'
-import { integrateRemoteStructs } from './MessageHandler/integrateRemoteStructs.js'
-
-import debug from 'debug'
-
-export default class AbstractConnector {
-  constructor (y, opts) {
-    this.y = y
-    this.opts = opts
-    if (opts.role == null || opts.role === 'master') {
-      this.role = 'master'
-    } else if (opts.role === 'slave') {
-      this.role = 'slave'
-    } else {
-      throw new Error("Role must be either 'master' or 'slave'!")
-    }
-    this.log = debug('y:connector')
-    this.logMessage = debug('y:connector-message')
-    this._forwardAppliedStructs = opts.forwardAppliedOperations || false // TODO: rename
-    this.role = opts.role
-    this.connections = new Map()
-    this.isSynced = false
-    this.userEventListeners = []
-    this.whenSyncedListeners = []
-    this.currentSyncTarget = null
-    this.debug = opts.debug === true
-    this.broadcastBuffer = new BinaryEncoder()
-    this.broadcastBufferSize = 0
-    this.protocolVersion = 11
-    this.authInfo = opts.auth || null
-    this.checkAuth = opts.checkAuth || function () { return Promise.resolve('write') } // default is everyone has write access
-    if (opts.maxBufferLength == null) {
-      this.maxBufferLength = -1
-    } else {
-      this.maxBufferLength = opts.maxBufferLength
-    }
-  }
-
-  reconnect () {
-    this.log('reconnecting..')
-  }
-
-  disconnect () {
-    this.log('discronnecting..')
-    this.connections = new Map()
-    this.isSynced = false
-    this.currentSyncTarget = null
-    this.whenSyncedListeners = []
-    return Promise.resolve()
-  }
-
-  onUserEvent (f) {
-    this.userEventListeners.push(f)
-  }
-
-  removeUserEventListener (f) {
-    this.userEventListeners = this.userEventListeners.filter(g => f !== g)
-  }
-
-  userLeft (user) {
-    if (this.connections.has(user)) {
-      this.log('%s: User left %s', this.y.userID, user)
-      this.connections.delete(user)
-      // check if isSynced event can be sent now
-      this._setSyncedWith(null)
-      for (var f of this.userEventListeners) {
-        f({
-          action: 'userLeft',
-          user: user
-        })
-      }
-    }
-  }
-
-  userJoined (user, role, auth) {
-    if (role == null) {
-      throw new Error('You must specify the role of the joined user!')
-    }
-    if (this.connections.has(user)) {
-      throw new Error('This user already joined!')
-    }
-    this.log('%s: User joined %s', this.y.userID, user)
-    this.connections.set(user, {
-      uid: user,
-      isSynced: false,
-      role: role,
-      processAfterAuth: [],
-      processAfterSync: [],
-      auth: auth || null,
-      receivedSyncStep2: false
-    })
-    let defer = {}
-    defer.promise = new Promise(function (resolve) { defer.resolve = resolve })
-    this.connections.get(user).syncStep2 = defer
-    for (var f of this.userEventListeners) {
-      f({
-        action: 'userJoined',
-        user: user,
-        role: role
-      })
-    }
-    this._syncWithUser(user)
-  }
-
-  // Execute a function _when_ we are connected.
-  // If not connected, wait until connected
-  whenSynced (f) {
-    if (this.isSynced) {
-      f()
-    } else {
-      this.whenSyncedListeners.push(f)
-    }
-  }
-
-  _syncWithUser (userID) {
-    if (this.role === 'slave') {
-      return // "The current sync has not finished or this is controlled by a master!"
-    }
-    sendSyncStep1(this, userID)
-  }
-
-  _fireIsSyncedListeners () {
-    if (!this.isSynced) {
-      this.isSynced = true
-      // It is safer to remove this!
-      // call whensynced listeners
-      for (var f of this.whenSyncedListeners) {
-        f()
-      }
-      this.whenSyncedListeners = []
-      this.y.emit('synced')
-    }
-  }
-
-  send (uid, buffer) {
-    const y = this.y
-    if (!(buffer instanceof ArrayBuffer || buffer instanceof Uint8Array)) {
-      throw new Error('Expected Message to be an ArrayBuffer or Uint8Array - don\'t use this method to send custom messages')
-    }
-    this.log('User%s to User%s: Send \'%y\'', y.userID, uid, buffer)
-    this.logMessage('User%s to User%s: Send %Y', y.userID, uid, [y, buffer])
-  }
-
-  broadcast (buffer) {
-    const y = this.y
-    if (!(buffer instanceof ArrayBuffer || buffer instanceof Uint8Array)) {
-      throw new Error('Expected Message to be an ArrayBuffer or Uint8Array - don\'t use this method to send custom messages')
-    }
-    this.log('User%s: Broadcast \'%y\'', y.userID, buffer)
-    this.logMessage('User%s: Broadcast: %Y', y.userID, [y, buffer])
-  }
-
-  /*
-    Buffer operations, and broadcast them when ready.
-  */
-  broadcastStruct (struct) {
-    const firstContent = this.broadcastBuffer.length === 0
-    if (firstContent) {
-      this.broadcastBuffer.writeVarString(this.y.room)
-      this.broadcastBuffer.writeVarString('update')
-      this.broadcastBufferSize = 0
-      this.broadcastBufferSizePos = this.broadcastBuffer.pos
-      this.broadcastBuffer.writeUint32(0)
-    }
-    this.broadcastBufferSize++
-    struct._toBinary(this.broadcastBuffer)
-    if (this.maxBufferLength > 0 && this.broadcastBuffer.length > this.maxBufferLength) {
-      // it is necessary to send the buffer now
-      // cache the buffer and check if server is responsive
-      const buffer = this.broadcastBuffer
-      buffer.setUint32(this.broadcastBufferSizePos, this.broadcastBufferSize)
-      this.broadcastBuffer = new BinaryEncoder()
-      this.whenRemoteResponsive().then(() => {
-        this.broadcast(buffer.createBuffer())
-      })
-    } else if (firstContent) {
-      // send the buffer when all transactions are finished
-      // (or buffer exceeds maxBufferLength)
-      setTimeout(() => {
-        if (this.broadcastBuffer.length > 0) {
-          const buffer = this.broadcastBuffer
-          buffer.setUint32(this.broadcastBufferSizePos, this.broadcastBufferSize)
-          this.broadcast(buffer.createBuffer())
-          this.broadcastBuffer = new BinaryEncoder()
-        }
-      }, 0)
-    }
-  }
-
-  /*
-   * Somehow check the responsiveness of the remote clients/server
-   * Default behavior:
-   *   Wait 100ms before broadcasting the next batch of operations
-   *
-   * Only used when maxBufferLength is set
-   *
-   */
-  whenRemoteResponsive () {
-    return new Promise(function (resolve) {
-      setTimeout(resolve, 100)
-    })
-  }
-
-  /*
-    You received a raw message, and you know that it is intended for Yjs. Then call this function.
-  */
-  receiveMessage (sender, buffer, skipAuth) {
-    const y = this.y
-    const userID = y.userID
-    skipAuth = skipAuth || false
-    if (!(buffer instanceof ArrayBuffer || buffer instanceof Uint8Array)) {
-      return Promise.reject(new Error('Expected Message to be an ArrayBuffer or Uint8Array!'))
-    }
-    if (sender === userID) {
-      return Promise.resolve()
-    }
-    let decoder = new BinaryDecoder(buffer)
-    let encoder = new BinaryEncoder()
-    let roomname = decoder.readVarString() // read room name
-    encoder.writeVarString(roomname)
-    let messageType = decoder.readVarString()
-    let senderConn = this.connections.get(sender)
-    this.log('User%s from User%s: Receive \'%s\'', userID, sender, messageType)
-    this.logMessage('User%s from User%s: Receive %Y', userID, sender, [y, buffer])
-    if (senderConn == null && !skipAuth) {
-      throw new Error('Received message from unknown peer!')
-    }
-    if (messageType === 'sync step 1' || messageType === 'sync step 2') {
-      let auth = decoder.readVarUint()
-      if (senderConn.auth == null) {
-        senderConn.processAfterAuth.push([messageType, senderConn, decoder, encoder, sender])
-        // check auth
-        return this.checkAuth(auth, y, sender).then(authPermissions => {
-          if (senderConn.auth == null) {
-            senderConn.auth = authPermissions
-            y.emit('userAuthenticated', {
-              user: senderConn.uid,
-              auth: authPermissions
-            })
-          }
-          let messages = senderConn.processAfterAuth
-          senderConn.processAfterAuth = []
-
-          messages.forEach(m =>
-            this.computeMessage(m[0], m[1], m[2], m[3], m[4])
-          )
-        })
-      }
-    }
-    if ((skipAuth || senderConn.auth != null) && (messageType !== 'update' || senderConn.isSynced)) {
-      this.computeMessage(messageType, senderConn, decoder, encoder, sender, skipAuth)
-    } else {
-      senderConn.processAfterSync.push([messageType, senderConn, decoder, encoder, sender, false])
-    }
-  }
-
-  computeMessage (messageType, senderConn, decoder, encoder, sender, skipAuth) {
-    if (messageType === 'sync step 1' && (senderConn.auth === 'write' || senderConn.auth === 'read')) {
-      // 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 {
-      const y = this.y
-      y.transact(function () {
-        if (messageType === 'sync step 2' && senderConn.auth === 'write') {
-          readSyncStep2(decoder, encoder, y, senderConn, sender)
-        } else if (messageType === 'update' && (skipAuth || senderConn.auth === 'write')) {
-          integrateRemoteStructs(decoder, encoder, y, senderConn, sender)
-        } else {
-          throw new Error('Unable to receive message')
-        }
-      }, true)
-    }
-  }
-
-  _setSyncedWith (user) {
-    if (user != null) {
-      const userConn = this.connections.get(user)
-      userConn.isSynced = true
-      const messages = userConn.processAfterSync
-      userConn.processAfterSync = []
-      messages.forEach(m => {
-        this.computeMessage(m[0], m[1], m[2], m[3], m[4])
-      })
-    }
-    const conns = Array.from(this.connections.values())
-    if (conns.length > 0 && conns.every(u => u.isSynced)) {
-      this._fireIsSyncedListeners()
-    }
-  }
-}

src/MessageHandler/deleteSet.js

@@ -1,130 +0,0 @@
-import { deleteItemRange } from '../Struct/Delete.js'
-import ID from '../Util/ID.js'
-
-export function stringifyDeleteSet (y, decoder, strBuilder) {
-  let dsLength = decoder.readUint32()
-  for (let i = 0; i < dsLength; i++) {
-    let user = decoder.readVarUint()
-    strBuilder.push(' -' + user + ':')
-    let dvLength = decoder.readVarUint()
-    for (let j = 0; j < dvLength; j++) {
-      let from = decoder.readVarUint()
-      let len = decoder.readVarUint()
-      let gc = decoder.readUint8() === 1
-      strBuilder.push(`clock: ${from}, length: ${len}, gc: ${gc}`)
-    }
-  }
-  return strBuilder
-}
-
-export function writeDeleteSet (y, encoder) {
-  let currentUser = null
-  let currentLength
-  let lastLenPos
-
-  let numberOfUsers = 0
-  let laterDSLenPus = encoder.pos
-  encoder.writeUint32(0)
-
-  y.ds.iterate(null, null, function (n) {
-    var user = n._id.user
-    var clock = n._id.clock
-    var len = n.len
-    var gc = n.gc
-    if (currentUser !== user) {
-      numberOfUsers++
-      // a new user was found
-      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)
-  }
-  encoder.setUint32(laterDSLenPus, numberOfUsers)
-}
-
-export function readDeleteSet (y, decoder) {
-  let dsLength = decoder.readUint32()
-  for (let i = 0; i < dsLength; i++) {
-    let user = decoder.readVarUint()
-    let dv = []
-    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])
-    }
-    if (dvLength > 0) {
-      let pos = 0
-      let d = dv[pos]
-      let deletions = []
-      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])
-          } 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])])
-            }
-          }
-          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
-          }
-        }
-      })
-      // TODO: It would be more performant to apply the deletes in the above loop
-      // Adapt the Tree implementation to support delete while iterating
-      for (let i = deletions.length - 1; i >= 0; i--) {
-        const del = deletions[i]
-        deleteItemRange(y, del[0], del[1], del[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]])
-      }
-    }
-  }
-}

src/MessageHandler/integrateRemoteStructs.js

@@ -1,100 +0,0 @@
-import { getStruct } from '../Util/structReferences.js'
-import BinaryDecoder from '../Binary/Decoder.js'
-import { logID } from './messageToString.js'
-
-class MissingEntry {
-  constructor (decoder, missing, struct) {
-    this.decoder = decoder
-    this.missing = missing.length
-    this.struct = struct
-  }
-}
-
-/**
- * Integrate remote struct
- * When a remote struct is integrated, other structs might be ready to ready to
- * integrate.
- */
-function _integrateRemoteStructHelper (y, struct) {
-  const id = struct._id
-  if (id === undefined) {
-    struct._integrate(y)
-  } else {
-    if (y.ss.getState(id.user) > id.clock) {
-      return
-    }
-    struct._integrate(y)
-    let msu = y._missingStructs.get(id.user)
-    if (msu != null) {
-      let clock = id.clock
-      const finalClock = clock + struct._length
-      for (;clock < finalClock; clock++) {
-        const missingStructs = msu.get(clock)
-        if (missingStructs !== undefined) {
-          missingStructs.forEach(missingDef => {
-            missingDef.missing--
-            if (missingDef.missing === 0) {
-              const decoder = missingDef.decoder
-              let oldPos = decoder.pos
-              let missing = missingDef.struct._fromBinary(y, decoder)
-              decoder.pos = oldPos
-              if (missing.length === 0) {
-                y._readyToIntegrate.push(missingDef.struct)
-              }
-            }
-          })
-          msu.delete(clock)
-        }
-      }
-    }
-  }
-}
-
-export function stringifyStructs (y, decoder, strBuilder) {
-  const len = decoder.readUint32()
-  for (let i = 0; i < len; i++) {
-    let reference = decoder.readVarUint()
-    let Constr = getStruct(reference)
-    let struct = new Constr()
-    let missing = struct._fromBinary(y, decoder)
-    let logMessage = '  ' + struct._logString()
-    if (missing.length > 0) {
-      logMessage += ' .. missing: ' + missing.map(logID).join(', ')
-    }
-    strBuilder.push(logMessage)
-  }
-}
-
-export function integrateRemoteStructs (decoder, encoder, y) {
-  const len = decoder.readUint32()
-  for (let i = 0; i < len; i++) {
-    let reference = decoder.readVarUint()
-    let Constr = getStruct(reference)
-    let struct = new Constr()
-    let decoderPos = decoder.pos
-    let missing = struct._fromBinary(y, decoder)
-    if (missing.length === 0) {
-      while (struct != null) {
-        _integrateRemoteStructHelper(y, struct)
-        struct = y._readyToIntegrate.shift()
-      }
-    } else {
-      let _decoder = new BinaryDecoder(decoder.uint8arr)
-      _decoder.pos = decoderPos
-      let missingEntry = new MissingEntry(_decoder, missing, struct)
-      let missingStructs = y._missingStructs
-      for (let i = missing.length - 1; i >= 0; i--) {
-        let m = missing[i]
-        if (!missingStructs.has(m.user)) {
-          missingStructs.set(m.user, new Map())
-        }
-        let msu = missingStructs.get(m.user)
-        if (!msu.has(m.clock)) {
-          msu.set(m.clock, [])
-        }
-        let mArray = msu = msu.get(m.clock)
-        mArray.push(missingEntry)
-      }
-    }
-  }
-}

src/MessageHandler/messageToString.js

@@ -1,48 +0,0 @@
-import BinaryDecoder from '../Binary/Decoder.js'
-import { stringifyStructs } from './integrateRemoteStructs.js'
-import { stringifySyncStep1 } from './syncStep1.js'
-import { stringifySyncStep2 } from './syncStep2.js'
-import ID from '../Util/ID.js'
-import RootID from '../Util/RootID.js'
-import Y from '../Y.js'
-
-export function messageToString ([y, buffer]) {
-  let decoder = new BinaryDecoder(buffer)
-  decoder.readVarString() // read roomname
-  let type = decoder.readVarString()
-  let strBuilder = []
-  strBuilder.push('\n === ' + type + ' ===')
-  if (type === 'update') {
-    stringifyStructs(y, decoder, strBuilder)
-  } else if (type === 'sync step 1') {
-    stringifySyncStep1(y, decoder, strBuilder)
-  } else if (type === 'sync step 2') {
-    stringifySyncStep2(y, decoder, strBuilder)
-  } else {
-    strBuilder.push('-- Unknown message type - probably an encoding issue!!!')
-  }
-  return strBuilder.join('\n')
-}
-
-export function messageToRoomname (buffer) {
-  let decoder = new BinaryDecoder(buffer)
-  decoder.readVarString() // roomname
-  return decoder.readVarString() // messageType
-}
-
-export function logID (id) {
-  if (id !== null && id._id != null) {
-    id = id._id
-  }
-  if (id === null) {
-    return '()'
-  } else if (id instanceof ID) {
-    return `(${id.user},${id.clock})`
-  } else if (id instanceof RootID) {
-    return `(${id.name},${id.type})`
-  } else if (id.constructor === Y) {
-    return `y`
-  } else {
-    throw new Error('This is not a valid ID!')
-  }
-}

src/MessageHandler/stateSet.js

@@ -1,23 +0,0 @@
-
-export function readStateSet (decoder) {
-  let ss = new Map()
-  let ssLength = decoder.readUint32()
-  for (let i = 0; i < ssLength; i++) {
-    let user = decoder.readVarUint()
-    let clock = decoder.readVarUint()
-    ss.set(user, clock)
-  }
-  return ss
-}
-
-export function writeStateSet (y, encoder) {
-  let lenPosition = encoder.pos
-  let len = 0
-  encoder.writeUint32(0)
-  for (let [user, clock] of y.ss.state) {
-    encoder.writeVarUint(user)
-    encoder.writeVarUint(clock)
-    len++
-  }
-  encoder.setUint32(lenPosition, len)
-}

src/MessageHandler/syncStep1.js

@@ -1,70 +0,0 @@
-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 (y, decoder, strBuilder) {
-  let auth = decoder.readVarString()
-  let protocolVersion = decoder.readVarUint()
-  strBuilder.push(`  - auth: "${auth}"`)
-  strBuilder.push(`  - protocolVersion: ${protocolVersion}`)
-  // write SS
-  let ssBuilder = []
-  let len = decoder.readUint32()
-  for (let i = 0; i < len; i++) {
-    let user = decoder.readVarUint()
-    let clock = decoder.readVarUint()
-    ssBuilder.push(`(${user}:${clock})`)
-  }
-  strBuilder.push('  == SS: ' + ssBuilder.join(','))
-}
-
-export function sendSyncStep1 (connector, syncUser) {
-  let encoder = new BinaryEncoder()
-  encoder.writeVarString(connector.y.room)
-  encoder.writeVarString('sync step 1')
-  encoder.writeVarString(connector.authInfo || '')
-  encoder.writeVarUint(connector.protocolVersion)
-  writeStateSet(connector.y, encoder)
-  connector.send(syncUser, encoder.createBuffer())
-}
-
-export default function writeStructs (encoder, decoder, y, ss) {
-  const lenPos = encoder.pos
-  encoder.writeUint32(0)
-  let len = 0
-  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)
-        len++
-      })
-    }
-  }
-  encoder.setUint32(lenPos, len)
-}
-
-export function readSyncStep1 (decoder, encoder, y, senderConn, sender) {
-  let protocolVersion = decoder.readVarUint()
-  // check protocol version
-  if (protocolVersion !== y.connector.protocolVersion) {
-    console.warn(
-      `You tried to sync with a Yjs instance that has a different protocol version
-      (You: ${protocolVersion}, Client: ${protocolVersion}).
-      `)
-    y.destroy()
-  }
-  // write sync step 2
-  encoder.writeVarString('sync step 2')
-  encoder.writeVarString(y.connector.authInfo || '')
-  const ss = readStateSet(decoder)
-  writeStructs(encoder, decoder, y, ss)
-  writeDeleteSet(y, encoder)
-  y.connector.send(senderConn.uid, encoder.createBuffer())
-  senderConn.receivedSyncStep2 = true
-  if (y.connector.role === 'slave') {
-    sendSyncStep1(y.connector, sender)
-  }
-}

src/MessageHandler/syncStep2.js

@@ -1,28 +0,0 @@
-import { stringifyStructs, integrateRemoteStructs } from './integrateRemoteStructs.js'
-import { readDeleteSet } from './deleteSet.js'
-
-export function stringifySyncStep2 (y, decoder, strBuilder) {
-  strBuilder.push('     - auth: ' + decoder.readVarString())
-  strBuilder.push('  == OS:')
-  stringifyStructs(y, decoder, strBuilder)
-  // write DS to string
-  strBuilder.push('  == DS:')
-  let len = decoder.readUint32()
-  for (let i = 0; i < len; i++) {
-    let user = decoder.readVarUint()
-    strBuilder.push(`    User: ${user}: `)
-    let len2 = decoder.readUint32()
-    for (let j = 0; j < len2; j++) {
-      let from = decoder.readVarUint()
-      let to = decoder.readVarUint()
-      let gc = decoder.readUint8() === 1
-      strBuilder.push(`[${from}, ${to}, ${gc}]`)
-    }
-  }
-}
-
-export function readSyncStep2 (decoder, encoder, y, senderConn, sender) {
-  integrateRemoteStructs(decoder, encoder, y)
-  readDeleteSet(y, decoder)
-  y.connector._setSyncedWith(sender)
-}

src/Persistence.js

@@ -1,47 +0,0 @@
-// import BinaryEncoder from './Binary/Encoder.js'
-
-export default function extendPersistence (Y) {
-  class AbstractPersistence {
-    constructor (y, opts) {
-      this.y = y
-      this.opts = opts
-      this.saveOperationsBuffer = []
-      this.log = Y.debug('y:persistence')
-    }
-
-    saveToMessageQueue (binary) {
-      this.log('Room %s: Save message to message queue', this.y.options.connector.room)
-    }
-
-    saveOperations (ops) {
-      ops = ops.map(function (op) {
-        return Y.Struct[op.struct].encode(op)
-      })
-      /*
-      const saveOperations = () => {
-        if (this.saveOperationsBuffer.length > 0) {
-          let encoder = new BinaryEncoder()
-          encoder.writeVarString(this.opts.room)
-          encoder.writeVarString('update')
-          let ops = this.saveOperationsBuffer
-          this.saveOperationsBuffer = []
-          let length = ops.length
-          encoder.writeUint32(length)
-          for (var i = 0; i < length; i++) {
-            let op = ops[i]
-            Y.Struct[op.struct].binaryEncode(encoder, op)
-          }
-          this.saveToMessageQueue(encoder.createBuffer())
-        }
-      }
-      */
-      if (this.saveOperationsBuffer.length === 0) {
-        this.saveOperationsBuffer = ops
-      } else {
-        this.saveOperationsBuffer = this.saveOperationsBuffer.concat(ops)
-      }
-    }
-  }
-
-  Y.AbstractPersistence = AbstractPersistence
-}

src/Store/DeleteStore.js

@@ -1,125 +0,0 @@
-import Tree from '../Util/Tree.js'
-import ID from '../Util/ID.js'
-
-class DSNode {
-  constructor (id, len, gc) {
-    this._id = id
-    this.len = len
-    this.gc = gc
-  }
-  clone () {
-    return new DSNode(this._id, this.len, this.gc)
-  }
-}
-
-export default class DeleteStore extends Tree {
-  logTable () {
-    const deletes = []
-    this.iterate(null, null, function (n) {
-      deletes.push({
-        user: n._id.user,
-        clock: n._id.clock,
-        len: n.len,
-        gc: n.gc
-      })
-    })
-    console.table(deletes)
-  }
-  isDeleted (id) {
-    var n = this.findWithUpperBound(id)
-    return n !== null && n._id.user === id.user && id.clock < n._id.clock + n.len
-  }
-  /*
-   * Mark an operation as deleted. returns the deleted node
-   */
-  markDeleted (id, length) {
-    if (length == null) {
-      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) {
-        // id is in n's range
-        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)
-            if (diff < length) {
-              // a partial deletion
-              let nId = id.clone()
-              nId.clock += diff
-              n = new DSNode(nId, length - diff, false)
-              this.put(n)
-            } else {
-              // already gc'd
-              throw new Error(
-                'DS reached an inconsistent state. Please report this issue!'
-              )
-            }
-          }
-        } else {
-          // no overlapping, already deleted
-          return n
-        }
-      } else {
-        // cannot extend left (there is no left!)
-        n = new DSNode(id, length, false)
-        this.put(n) // TODO: you double-put !!
-      }
-    } else {
-      // cannot extend left
-      n = new DSNode(id, length, false)
-      this.put(n)
-    }
-    // can extend right?
-    var next = this.findNext(n._id)
-    if (
-      next != null &&
-      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
-      while (diff >= 0) {
-        // n overlaps with next
-        if (next.gc) {
-          // gc is stronger, so reduce length of n
-          n.len -= diff
-          if (diff >= next.len) {
-            // delete the missing range after next
-            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)
-            }
-          }
-          break
-        } else {
-          // we can extend n with next
-          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) {
-              break
-            } else {
-              next = _next
-              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)
-            break
-          }
-        }
-      }
-    }
-    this.put(n)
-    return n
-  }
-}

src/Store/OperationStore.js

@@ -1,85 +0,0 @@
-import Tree from '../Util/Tree.js'
-import RootID from '../Util/RootID.js'
-import { getStruct } from '../Util/structReferences.js'
-import { logID } from '../MessageHandler/messageToString.js'
-
-export default class OperationStore extends Tree {
-  constructor (y) {
-    super()
-    this.y = y
-  }
-  logTable () {
-    const items = []
-    this.iterate(null, null, function (item) {
-      items.push({
-        id: logID(item),
-        origin: logID(item._origin === null ? null : item._origin._lastId),
-        left: logID(item._left === null ? null : item._left._lastId),
-        right: logID(item._right),
-        right_origin: logID(item._right_origin),
-        parent: logID(item._parent),
-        parentSub: item._parentSub,
-        deleted: item._deleted,
-        content: JSON.stringify(item._content)
-      })
-    })
-    console.table(items)
-  }
-  get (id) {
-    let struct = this.find(id)
-    if (struct === null && id instanceof RootID) {
-      const Constr = getStruct(id.type)
-      const y = this.y
-      struct = new Constr()
-      struct._id = id
-      struct._parent = y
-      y.transact(() => {
-        struct._integrate(y)
-      })
-      this.put(struct)
-    }
-    return struct
-  }
-  // Use getItem for structs with _length > 1
-  getItem (id) {
-    var item = this.findWithUpperBound(id)
-    if (item === null) {
-      return null
-    }
-    const itemID = item._id
-    if (id.user === itemID.user && id.clock < itemID.clock + item._length) {
-      return item
-    } else {
-      return null
-    }
-  }
-  // Return an insertion such that id is the first element of content
-  // This function manipulates an item, if necessary
-  getItemCleanStart (id) {
-    var ins = this.getItem(id)
-    if (ins === null || ins._length === 1) {
-      return ins
-    }
-    const insID = ins._id
-    if (insID.clock === id.clock) {
-      return ins
-    } else {
-      return ins._splitAt(this.y, id.clock - insID.clock)
-    }
-  }
-  // Return an insertion such that id is the last element of content
-  // This function manipulates an operation, if necessary
-  getItemCleanEnd (id) {
-    var ins = this.getItem(id)
-    if (ins === null || ins._length === 1) {
-      return ins
-    }
-    const insID = ins._id
-    if (insID.clock + ins._length - 1 === id.clock) {
-      return ins
-    } else {
-      ins._splitAt(this.y, id.clock - insID.clock + 1)
-      return ins
-    }
-  }
-}

src/Store/StateStore.js

@@ -1,47 +0,0 @@
-import ID from '../Util/ID.js'
-
-export default class StateStore {
-  constructor (y) {
-    this.y = y
-    this.state = new Map()
-  }
-  logTable () {
-    const entries = []
-    for (let [user, state] of this.state) {
-      entries.push({
-        user, state
-      })
-    }
-    console.table(entries)
-  }
-  getNextID (len) {
-    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
-    let userState = this.state.get(user)
-    while (struct !== null && struct._id.clock === userState) {
-      userState += struct._length
-      struct = this.y.os.get(new ID(user, userState))
-    }
-    this.state.set(user, userState)
-  }
-  getState (user) {
-    let state = this.state.get(user)
-    if (state == null) {
-      return 0
-    }
-    return state
-  }
-  setState (user, state) {
-    // TODO: modify missingi structs here
-    const beforeState = this.y._transaction.beforeState
-    if (!beforeState.has(user)) {
-      beforeState.set(user, this.getState(user))
-    }
-    this.state.set(user, state)
-  }
-}

src/Struct/Delete.js

@@ -1,84 +0,0 @@
-import { getReference } from '../Util/structReferences.js'
-import ID from '../Util/ID.js'
-import { logID } from '../MessageHandler/messageToString.js'
-
-/**
- * Delete all items in an ID-range
- * TODO: implement getItemCleanStartNode for better performance (only one lookup)
- */
-export function deleteItemRange (y, user, clock, range) {
-  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()
-      }
-    }
-  }
-}
-
-/**
- * Delete is not a real struct. It will not be saved in OS
- */
-export default class Delete {
-  constructor () {
-    this._target = null
-    this._length = null
-  }
-  _fromBinary (y, decoder) {
-    // TODO: set target, and add it to missing if not found
-    // There is an edge case in p2p networks!
-    const targetID = decoder.readID()
-    this._targetID = targetID
-    this._length = decoder.readVarUint()
-    if (y.os.getItem(targetID) === null) {
-      return [targetID]
-    } else {
-      return []
-    }
-  }
-  _toBinary (encoder) {
-    encoder.writeUint8(getReference(this.constructor))
-    encoder.writeID(this._targetID)
-    encoder.writeVarUint(this._length)
-  }
-  /**
-   * - If created remotely (a remote user deleted something),
-   *   this Delete is applied to all structs in id-range.
-   * - If created lokally (e.g. when y-array deletes a range of elements),
-   *   this struct is broadcasted only (it is already executed)
-   */
-  _integrate (y, locallyCreated = false) {
-    if (!locallyCreated) {
-      // from remote
-      const id = this._targetID
-      deleteItemRange(y, id.user, id.clock, this._length)
-    } else {
-      // from local
-      y.connector.broadcastStruct(this)
-    }
-    if (y.persistence !== null) {
-      y.persistence.saveOperations(this)
-    }
-  }
-  _logString () {
-    return `Delete - target: ${logID(this._targetID)}, len: ${this._length}`
-  }
-}

src/Struct/Item.js

@@ -1,327 +0,0 @@
-import { getReference } from '../Util/structReferences.js'
-import ID from '../Util/ID.js'
-import { RootFakeUserID } from '../Util/RootID.js'
-import Delete from './Delete.js'
-import { transactionTypeChanged } from '../Transaction.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
-  b._right = a._right
-  if (b._right !== null) {
-    b._right._left = b
-  }
-  b._right_origin = a._right_origin
-  // do not set a._right_origin, as this will lead to problems when syncing
-  a._right = b
-  b._parent = a._parent
-  b._parentSub = a._parentSub
-  b._deleted = a._deleted
-  // now search all relevant items to the right and update origin
-  // if origin is not it foundOrigins, we don't have to search any longer
-  let foundOrigins = new Set()
-  foundOrigins.add(a)
-  let o = b._right
-  while (o !== null && foundOrigins.has(o._origin)) {
-    if (o._origin === a) {
-      o._origin = b
-    }
-    foundOrigins.add(o)
-    o = o._right
-  }
-  y.os.put(b)
-}
-
-export default class Item {
-  constructor () {
-    this._id = null
-    this._origin = null
-    this._left = null
-    this._right = null
-    this._right_origin = null
-    this._parent = null
-    this._parentSub = null
-    this._deleted = false
-  }
-  /**
-   * Copy the effect of struct
-   */
-  _copy () {
-    let struct = new this.constructor()
-    struct._origin = this._left
-    struct._left = this._left
-    struct._right = this
-    struct._right_origin = this
-    struct._parent = this._parent
-    struct._parentSub = this._parentSub
-    return struct
-  }
-  get _lastId () {
-    return new ID(this._id.user, this._id.clock + this._length - 1)
-  }
-  get _length () {
-    return 1
-  }
-  /**
-   * 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, 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)
-    }
-    transactionTypeChanged(y, this._parent, this._parentSub)
-    y._transaction.deletedStructs.add(this)
-  }
-  /**
-   * 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
-   * - Add this struct to y.os
-   * - 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.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._transaction.changedTypes.has(parent) && !y._transaction.newTypes.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
-    # case 1: $origin equals $o.origin: the $creator parameter decides if left or right
-    #         let $OL= [o1,o2,o3,o4], whereby $this is to be inserted between o1 and o4
-    #         o2,o3 and o4 origin is 1 (the position of o2)
-    #         there is the case that $this.creator < o2.creator, but o3.creator < $this.creator
-    #         then o2 knows o3. Since on another client $OL could be [o1,o3,o4] the problem is complex
-    #         therefore $this would be always to the right of o3
-    # case 2: $origin < $o.origin
-    #         if current $this insert_position > $o origin: $this ins
-    #         else $insert_position will not change
-    #         (maybe we encounter case 1 later, then this will be to the right of $o)
-    # case 3: $origin > $o.origin
-    #         $this insert_position is to the left of $o (forever!)
-    */
-    // handle conflicts
-    let o
-    // set o to the first conflicting item
-    if (this._left !== null) {
-      o = this._left._right
-    } else if (this._parentSub !== null) {
-      o = this._parent._map.get(this._parentSub) || null
-    } else {
-      o = this._parent._start
-    }
-    let conflictingItems = new Set()
-    let itemsBeforeOrigin = new Set()
-    // Let c in conflictingItems, b in itemsBeforeOrigin
-    // ***{origin}bbbb{this}{c,b}{c,b}{o}***
-    // Note that conflictingItems is a subset of itemsBeforeOrigin
-    while (o !== null && o !== this._right) {
-      itemsBeforeOrigin.add(o)
-      conflictingItems.add(o)
-      if (this._origin === o._origin) {
-        // case 1
-        if (o._id.user < this._id.user) {
-          this._left = o
-          conflictingItems.clear()
-        }
-      } else if (itemsBeforeOrigin.has(o._origin)) {
-        // case 2
-        if (!conflictingItems.has(o._origin)) {
-          this._left = o
-          conflictingItems.clear()
-        }
-      } else {
-        break
-      }
-      // TODO: try to use right_origin instead.
-      // Then you could basically omit conflictingItems!
-      // Note: you probably can't use right_origin in every case.. only when setting _left
-      o = o._right
-    }
-    // reconnect left/right + update parent map/start if necessary
-    const parentSub = this._parentSub
-    if (this._left === null) {
-      let right
-      if (parentSub !== null) {
-        const pmap = parent._map
-        right = pmap.get(parentSub) || null
-        pmap.set(parentSub, this)
-      } else {
-        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
-      }
-    }
-    if (parent._deleted) {
-      this._delete(y, false)
-    }
-    y.os.put(this)
-    transactionTypeChanged(y, parent, parentSub)
-    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)
-      }
-    }
-  }
-  _toBinary (encoder) {
-    encoder.writeUint8(getReference(this.constructor))
-    let info = 0
-    if (this._origin !== null) {
-      info += 0b1 // origin is defined
-    }
-    // TODO: remove
-    /* no longer send _left
-    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._lastId)
-    }
-    // TODO: remove
-    /* see above
-    if (info & 0b10) {
-      encoder.writeID(this._left._lastId)
-    }
-    */
-    if (info & 0b100) {
-      encoder.writeID(this._right_origin._id)
-    }
-    if ((info & 0b101) === 0) {
-      // 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 = []
-    const info = decoder.readUint8()
-    const id = decoder.readID()
-    this._id = id
-    // read origin
-    if (info & 0b1) {
-      // origin != null
-      const originID = decoder.readID()
-      // we have to query for left again because it might have been split/merged..
-      const origin = y.os.getItemCleanEnd(originID)
-      if (origin === null) {
-        missing.push(originID)
-      } else {
-        this._origin = origin
-        this._left = this._origin
-      }
-    }
-    // read right
-    if (info & 0b100) {
-      // right != null
-      const rightID = decoder.readID()
-      // we have to query for right again because it might have been split/merged..
-      const right = y.os.getItemCleanStart(rightID)
-      if (right === null) {
-        missing.push(rightID)
-      } else {
-        this._right = right
-        this._right_origin = right
-      }
-    }
-    // read parent
-    if ((info & 0b101) === 0) {
-      // neither origin nor right is defined
-      const parentID = decoder.readID()
-      // parent does not change, so we don't have to search for it again
-      if (this._parent === null) {
-        const parent = y.os.get(parentID)
-        if (parent === null) {
-          missing.push(parentID)
-        } 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._right_origin._parent
-      }
-    }
-    if (info & 0b1000) {
-      // 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
-  }
-}

src/Struct/ItemJSON.js

@@ -1,64 +0,0 @@
-import { splitHelper, default as Item } from './Item.js'
-import { logID } from '../MessageHandler/messageToString.js'
-
-export default class ItemJSON extends Item {
-  constructor () {
-    super()
-    this._content = null
-  }
-  _copy () {
-    let struct = super._copy()
-    struct._content = this._content
-    return struct
-  }
-  get _length () {
-    return this._content.length
-  }
-  _fromBinary (y, decoder) {
-    let missing = super._fromBinary(y, decoder)
-    let len = decoder.readVarUint()
-    this._content = new Array(len)
-    for (let i = 0; i < len; i++) {
-      const ctnt = decoder.readVarString()
-      let parsed
-      if (ctnt === 'undefined') {
-        parsed = undefined
-      } else {
-        parsed = JSON.parse(ctnt)
-      }
-      this._content[i] = parsed
-    }
-    return missing
-  }
-  _toBinary (encoder) {
-    super._toBinary(encoder)
-    let len = this._content.length
-    encoder.writeVarUint(len)
-    for (let i = 0; i < len; i++) {
-      let encoded
-      let content = this._content[i]
-      if (content === undefined) {
-        encoded = 'undefined'
-      } else {
-        encoded = JSON.stringify(content)
-      }
-      encoder.writeVarString(encoded)
-    }
-  }
-  _logString () {
-    const left = this._left !== null ? this._left._lastId : null
-    const origin = this._origin !== null ? this._origin._lastId : null
-    return `ItemJSON(id:${logID(this._id)},content:${JSON.stringify(this._content)},left:${logID(left)},origin:${logID(origin)},right:${logID(this._right)},parent:${logID(this._parent)},parentSub:${this._parentSub})`
-  }
-  _splitAt (y, diff) {
-    if (diff === 0) {
-      return this
-    } else if (diff >= this._length) {
-      return this._right
-    }
-    let item = new ItemJSON()
-    item._content = this._content.splice(diff)
-    splitHelper(y, this, item, diff)
-    return item
-  }
-}

src/Struct/ItemString.js

@@ -1,43 +0,0 @@
-import { splitHelper, default as Item } from './Item.js'
-import { logID } from '../MessageHandler/messageToString.js'
-
-export default class ItemString extends Item {
-  constructor () {
-    super()
-    this._content = null
-  }
-  _copy () {
-    let struct = super._copy()
-    struct._content = this._content
-    return struct
-  }
-  get _length () {
-    return this._content.length
-  }
-  _fromBinary (y, decoder) {
-    let missing = super._fromBinary(y, decoder)
-    this._content = decoder.readVarString()
-    return missing
-  }
-  _toBinary (encoder) {
-    super._toBinary(encoder)
-    encoder.writeVarString(this._content)
-  }
-  _logString () {
-    const left = this._left !== null ? this._left._lastId : null
-    const origin = this._origin !== null ? this._origin._lastId : null
-    return `ItemJSON(id:${logID(this._id)},content:${JSON.stringify(this._content)},left:${logID(left)},origin:${logID(origin)},right:${logID(this._right)},parent:${logID(this._parent)},parentSub:${this._parentSub})`
-  }
-  _splitAt (y, diff) {
-    if (diff === 0) {
-      return this
-    } else if (diff >= this._length) {
-      return this._right
-    }
-    let item = new ItemString()
-    item._content = this._content.slice(diff)
-    this._content = this._content.slice(0, diff)
-    splitHelper(y, this, item, diff)
-    return item
-  }
-}

src/Struct/Type.js

@@ -1,172 +0,0 @@
-import Item from './Item.js'
-import EventHandler from '../Util/EventHandler.js'
-import ID from '../Util/ID.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 function getListItemIDByPosition (type, i) {
-  let pos = 0
-  let n = type._start
-  while (n !== null) {
-    if (!n._deleted) {
-      if (pos <= i && i < pos + n._length) {
-        const id = n._id
-        return new ID(id.user, id.clock + i - pos)
-      }
-      pos++
-    }
-    n = n._right
-  }
-}
-
-export default class Type extends Item {
-  constructor () {
-    super()
-    this._map = new Map()
-    this._start = null
-    this._y = null
-    this._eventHandler = new EventHandler()
-    this._deepEventHandler = new EventHandler()
-  }
-  getPathTo (type) {
-    if (type === this) {
-      return []
-    }
-    const path = []
-    const y = this._y
-    while (type._parent !== this && this._parent !== y) {
-      let parent = type._parent
-      if (type._parentSub !== null) {
-        path.push(type._parentSub)
-      } else {
-        // parent is array-ish
-        for (let [i, child] of parent) {
-          if (child === type) {
-            path.push(i)
-            break
-          }
-        }
-      }
-      type = parent
-    }
-    if (this._parent !== this) {
-      throw new Error('The type is not a child of this node')
-    }
-    return path
-  }
-  _callEventHandler (transaction, event) {
-    const changedParentTypes = transaction.changedParentTypes
-    this._eventHandler.callEventListeners(transaction, event)
-    let type = this
-    while (type !== this._y) {
-      let events = changedParentTypes.get(type)
-      if (events === undefined) {
-        events = []
-        changedParentTypes.set(type, events)
-      }
-      events.push(event)
-      type = type._parent
-    }
-  }
-  _copy (undeleteChildren) {
-    let copy = super._copy()
-    let map = new Map()
-    copy._map = map
-    for (let [key, value] of this._map) {
-      if (undeleteChildren.has(value) || !value.deleted) {
-        let _item = value._copy(undeleteChildren)
-        _item._parent = copy
-        map.set(key, value._copy(undeleteChildren))
-      }
-    }
-    let prevUndeleted = null
-    copy._start = null
-    let item = this._start
-    while (item !== null) {
-      if (undeleteChildren.has(item) || !item.deleted) {
-        let _item = item._copy(undeleteChildren)
-        _item._left = prevUndeleted
-        _item._origin = prevUndeleted
-        _item._right = null
-        _item._right_origin = null
-        _item._parent = copy
-        if (prevUndeleted === null) {
-          copy._start = _item
-        } else {
-          prevUndeleted._right = _item
-        }
-        prevUndeleted = _item
-      }
-      item = item._right
-    }
-    return copy
-  }
-  _transact (f) {
-    const y = this._y
-    if (y !== null) {
-      y.transact(f)
-    } else {
-      f(y)
-    }
-  }
-  observe (f) {
-    this._eventHandler.addEventListener(f)
-  }
-  observeDeep (f) {
-    this._deepEventHandler.addEventListener(f)
-  }
-  unobserve (f) {
-    this._eventHandler.removeEventListener(f)
-  }
-  unobserveDeep (f) {
-    this._deepEventHandler.removeEventListener(f)
-  }
-  _integrate (y) {
-    y._transaction.newTypes.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
-    this._map = new Map()
-    for (let t of map.values()) {
-      // TODO make sure that right elements are deleted!
-      integrateChildren(y, t)
-    }
-  }
-  _delete (y, createDelete) {
-    super._delete(y, createDelete)
-    y._transaction.changedTypes.delete(this)
-    // delete map types
-    for (let value of this._map.values()) {
-      if (value instanceof Item && !value._deleted) {
-        value._delete(y, false)
-      }
-    }
-    // delete array types
-    let t = this._start
-    while (t !== null) {
-      if (!t._deleted) {
-        t._delete(y, false)
-      }
-      t = t._right
-    }
-  }
-}

src/Transaction.js

@@ -1,27 +0,0 @@
-
-export default class Transaction {
-  constructor (y) {
-    this.y = y
-    // types added during transaction
-    this.newTypes = new Set()
-    // changed types (does not include new types)
-    // maps from type to parentSubs (item._parentSub = null for array elements)
-    this.changedTypes = new Map()
-    this.deletedStructs = new Set()
-    this.beforeState = new Map()
-    this.changedParentTypes = new Map()
-  }
-}
-
-export function transactionTypeChanged (y, type, sub) {
-  if (type !== y && !type._deleted && !y._transaction.newTypes.has(type)) {
-    const changedTypes = y._transaction.changedTypes
-    let subs = changedTypes.get(type)
-    if (subs === undefined) {
-      // create if it doesn't exist yet
-      subs = new Set()
-      changedTypes.set(type, subs)
-    }
-    subs.add(sub)
-  }
-}

src/Type/YArray.js

@@ -1,222 +0,0 @@
-import Type from '../Struct/Type.js'
-import ItemJSON from '../Struct/ItemJSON.js'
-import ItemString from '../Struct/ItemString.js'
-import { logID } from '../MessageHandler/messageToString.js'
-import YEvent from '../Util/YEvent.js'
-
-class YArrayEvent extends YEvent {
-  constructor (yarray, remote) {
-    super(yarray)
-    this.remote = remote
-  }
-}
-
-export default class YArray extends Type {
-  _callObserver (transaction, parentSubs, remote) {
-    this._callEventHandler(transaction, new YArrayEvent(this, remote))
-  }
-  get (pos) {
-    let n = this._start
-    while (n !== null) {
-      if (!n._deleted) {
-        if (pos < n._length) {
-          if (n.constructor === ItemJSON || n.constructor === ItemString) {
-            return n._content[pos]
-          } else {
-            return n
-          }
-        }
-        pos -= n._length
-      }
-      n = n._right
-    }
-  }
-  toArray () {
-    return this.map(c => c)
-  }
-  toJSON () {
-    return this.map(c => {
-      if (c instanceof Type) {
-        if (c.toJSON !== null) {
-          return c.toJSON()
-        } else {
-          return c.toString()
-        }
-      }
-      return c
-    })
-  }
-  map (f) {
-    const res = []
-    this.forEach((c, i) => {
-      res.push(f(c, i, this))
-    })
-    return res
-  }
-  forEach (f) {
-    let pos = 0
-    let n = this._start
-    while (n !== null) {
-      if (!n._deleted) {
-        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
-    }
-  }
-  get length () {
-    let length = 0
-    let n = this._start
-    while (n !== null) {
-      if (!n._deleted) {
-        length += n._length
-      }
-      n = n._right
-    }
-    return length
-  }
-  [Symbol.iterator] () {
-    return {
-      next: function () {
-        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
-        }
-        if (this._item === null) {
-          return {
-            done: true
-          }
-        }
-        let content
-        if (this._item instanceof Type) {
-          content = this._item
-        } else {
-          content = this._item._content[this._itemElement++]
-        }
-        return {
-          value: [this._count, content],
-          done: false
-        }
-      },
-      _item: this._start,
-      _itemElement: 0,
-      _count: 0
-    }
-  }
-  delete (pos, length = 1) {
-    this._y.transact(() => {
-      let item = this._start
-      let count = 0
-      while (item !== null && length > 0) {
-        if (!item._deleted) {
-          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)
-            count += diffDel
-          } else {
-            count += item._length
-          }
-        }
-        item = item._right
-      }
-    })
-    if (length > 0) {
-      throw new Error('Delete exceeds the range of the YArray')
-    }
-  }
-  insertAfter (left, content) {
-    this._transact(y => {
-      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 (typeof c === 'function') {
-          c = new c() // eslint-disable-line new-cap
-        }
-        if (c instanceof Type) {
-          if (prevJsonIns !== null) {
-            if (y !== null) {
-              prevJsonIns._integrate(y)
-            }
-            left = prevJsonIns
-            prevJsonIns = null
-          }
-          c._origin = left
-          c._left = left
-          c._right = right
-          c._right_origin = right
-          c._parent = this
-          if (y !== null) {
-            c._integrate(y)
-          } else if (left === null) {
-            this._start = c
-          } else {
-            left._right = 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 && y !== null) {
-        prevJsonIns._integrate(y)
-      }
-    })
-  }
-  insert (pos, content) {
-    let left = null
-    let right = this._start
-    let count = 0
-    const y = this._y
-    while (right !== null) {
-      const rightLen = right._deleted ? 0 : (right._length - 1)
-      if (count <= pos && pos <= count + rightLen) {
-        const splitDiff = pos - count
-        right = right._splitAt(y, splitDiff)
-        left = right._left
-        count += splitDiff
-        break
-      }
-      if (!right._deleted) {
-        count += right._length
-      }
-      left = right
-      right = right._right
-    }
-    if (pos > count) {
-      throw new Error('Position exceeds array range!')
-    }
-    this.insertAfter(left, content)
-  }
-  _logString () {
-    const left = this._left !== null ? this._left._lastId : null
-    const origin = this._origin !== null ? this._origin._lastId : null
-    return `YArray(id:${logID(this._id)},start:${logID(this._start)},left:${logID(left)},origin:${logID(origin)},right:${logID(this._right)},parent:${logID(this._parent)},parentSub:${this._parentSub})`
-  }
-}

src/Type/YMap.js

@@ -1,114 +0,0 @@
-import Type from '../Struct/Type.js'
-import Item from '../Struct/Item.js'
-import ItemJSON from '../Struct/ItemJSON.js'
-import { logID } from '../MessageHandler/messageToString.js'
-import YEvent from '../Util/YEvent.js'
-
-class YMapEvent extends YEvent {
-  constructor (ymap, subs, remote) {
-    super(ymap)
-    this.keysChanged = subs
-    this.remote = remote
-  }
-}
-
-export default class YMap extends Type {
-  _callObserver (transaction, parentSubs, remote) {
-    this._callEventHandler(transaction, new YMapEvent(this, parentSubs, remote))
-  }
-  toJSON () {
-    const map = {}
-    for (let [key, item] of this._map) {
-      if (!item._deleted) {
-        let res
-        if (item instanceof Type) {
-          if (item.toJSON !== undefined) {
-            res = item.toJSON()
-          } else {
-            res = item.toString()
-          }
-        } else {
-          res = item._content[0]
-        }
-        map[key] = res
-      }
-    }
-    return map
-  }
-  keys () {
-    let keys = []
-    for (let [key, value] of this._map) {
-      if (!value._deleted) {
-        keys.push(key)
-      }
-    }
-    return keys
-  }
-  delete (key) {
-    this._transact((y) => {
-      let c = this._map.get(key)
-      if (y !== null && c !== undefined) {
-        c._delete(y)
-      }
-    })
-  }
-  set (key, value) {
-    this._transact(y => {
-      const old = this._map.get(key) || null
-      if (old !== null) {
-        if (old instanceof ItemJSON && old._content[0] === value) {
-          // Trying to overwrite with same value
-          // break here
-          return value
-        }
-        if (y !== null) {
-          old._delete(y)
-        }
-      }
-      let v
-      if (typeof value === 'function') {
-        v = new value() // eslint-disable-line new-cap
-        value = v
-      } else 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
-      if (y !== null) {
-        v._integrate(y)
-      } else {
-        this._map.set(key, v)
-      }
-    })
-    return value
-  }
-  get (key) {
-    let v = this._map.get(key)
-    if (v === undefined || v._deleted) {
-      return undefined
-    }
-    if (v instanceof Type) {
-      return v
-    } else {
-      return v._content[v._content.length - 1]
-    }
-  }
-  has (key) {
-    let v = this._map.get(key)
-    if (v === undefined || v._deleted) {
-      return false
-    } else {
-      return true
-    }
-  }
-  _logString () {
-    const left = this._left !== null ? this._left._lastId : null
-    const origin = this._origin !== null ? this._origin._lastId : null
-    return `YMap(id:${logID(this._id)},mapSize:${this._map.size},left:${logID(left)},origin:${logID(origin)},right:${logID(this._right)},parent:${logID(this._parent)},parentSub:${this._parentSub})`
-  }
-}

src/Type/YText.js

@@ -1,67 +0,0 @@
-import ItemString from '../Struct/ItemString.js'
-import YArray from './YArray.js'
-import { logID } from '../MessageHandler/messageToString.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._transact(y => {
-      let left = null
-      let right = this._start
-      let count = 0
-      while (right !== null) {
-        if (count <= pos && pos < count + right._length) {
-          const splitDiff = pos - count
-          right = right._splitAt(this._y, pos - count)
-          left = right._left
-          count += splitDiff
-          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
-      if (y !== null) {
-        item._integrate(this._y)
-      } else if (left === null) {
-        this._start = item
-      } else {
-        left._right = item
-      }
-    })
-  }
-  _logString () {
-    const left = this._left !== null ? this._left._lastId : null
-    const origin = this._origin !== null ? this._origin._lastId : null
-    return `YText(id:${logID(this._id)},start:${logID(this._start)},left:${logID(left)},origin:${logID(origin)},right:${logID(this._right)},parent:${logID(this._parent)},parentSub:${this._parentSub})`
-  }
-}

src/Type/y-xml/YXmlElement.js

@@ -1,129 +0,0 @@
-// 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, _document) {
-    super()
-    this.nodeName = null
-    this._scrollElement = null
-    if (typeof arg1 === 'string') {
-      this.nodeName = arg1.toUpperCase()
-    } else if (arg1 != null && arg1.nodeType != null && arg1.nodeType === arg1.ELEMENT_NODE) {
-      this.nodeName = arg1.nodeName
-      this._setDom(arg1, _document)
-    } else {
-      this.nodeName = 'UNDEFINED'
-    }
-    if (typeof arg2 === 'function') {
-      this._domFilter = arg2
-    }
-  }
-  _copy (undeleteChildren) {
-    let struct = super._copy(undeleteChildren)
-    struct.nodeName = this.nodeName
-    return struct
-  }
-  _setDom (dom, _document) {
-    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 {
-      // tag is already set in constructor
-      // set attributes
-      let attributes = new Map()
-      for (let i = 0; i < dom.attributes.length; i++) {
-        let attr = dom.attributes[i]
-        attributes.set(attr.name, attr.value)
-      }
-      attributes = this._domFilter(dom, attributes)
-      attributes.forEach((value, name) => {
-        this.setAttribute(name, value)
-      })
-      this.insertDomElements(0, Array.prototype.slice.call(dom.childNodes), _document)
-      this._bindToDom(dom, _document)
-      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)
-  }
-  /**
-   * Returns the string representation of the XML document.
-   * The attributes are ordered by attribute-name, so you can easily use this
-   * method to compare YXmlElements
-   */
-  toString () {
-    const attrs = this.getAttributes()
-    const stringBuilder = []
-    const keys = []
-    for (let key in attrs) {
-      keys.push(key)
-    }
-    keys.sort()
-    const keysLen = keys.length
-    for (let i = 0; i < keysLen; i++) {
-      const key = keys[i]
-      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) {
-      if (!value._deleted) {
-        obj[key] = value._content[0]
-      }
-    }
-    return obj
-  }
-  getDom (_document) {
-    _document = _document || document
-    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(_document))
-      })
-      this._bindToDom(dom, _document)
-    }
-    return dom
-  }
-}

src/Type/y-xml/YXmlEvent.js

@@ -1,17 +0,0 @@
-import YEvent from '../../Util/YEvent.js'
-
-export default class YXmlEvent extends YEvent {
-  constructor (target, subs, remote) {
-    super(target)
-    this.childListChanged = false
-    this.attributesChanged = new Set()
-    this.remote = remote
-    subs.forEach((sub) => {
-      if (sub === null) {
-        this.childListChanged = true
-      } else {
-        this.attributesChanged.add(sub)
-      }
-    })
-  }
-}

src/Type/y-xml/YXmlFragment.js

@@ -1,335 +0,0 @@
-/* global MutationObserver */
-
-import { defaultDomFilter, applyChangesFromDom, reflectChangesOnDom } from './utils.js'
-import { beforeTransactionSelectionFixer, afterTransactionSelectionFixer } from './selection.js'
-
-import YArray from '../YArray.js'
-import YXmlText from './YXmlText.js'
-import YXmlEvent from './YXmlEvent.js'
-import { logID } from '../../MessageHandler/messageToString.js'
-import diff from 'fast-diff'
-
-function domToYXml (parent, doms, _document) {
-  const types = []
-  doms.forEach(d => {
-    if (d._yxml != null && d._yxml !== false) {
-      d._yxml._unbindFromDom()
-    }
-    if (parent._domFilter(d.nodeName, new Map()) !== null) {
-      let type
-      if (d.nodeType === d.TEXT_NODE) {
-        type = new YXmlText(d)
-      } else if (d.nodeType === d.ELEMENT_NODE) {
-        type = new YXmlFragment._YXmlElement(d, parent._domFilter, _document)
-      } else {
-        throw new Error('Unsupported node!')
-      }
-      type.enableSmartScrolling(parent._scrollElement)
-      types.push(type)
-    } else {
-      d._yxml = false
-    }
-  })
-  return types
-}
-
-class YXmlTreeWalker {
-  constructor (root, f) {
-    this._filter = f || (() => true)
-    this._root = root
-    this._currentNode = root
-    this._firstCall = true
-  }
-  [Symbol.iterator] () {
-    return this
-  }
-  next () {
-    let n = this._currentNode
-    if (this._firstCall) {
-      this._firstCall = false
-      if (!n._deleted && this._filter(n)) {
-        return { value: n, done: false }
-      }
-    }
-    do {
-      if (!n._deleted && n.constructor === YXmlFragment._YXmlElement && n._start !== null) {
-        // walk down in the tree
-        n = n._start
-      } else {
-        // walk right or up in the tree
-        while (n !== this._root) {
-          if (n._right !== null) {
-            n = n._right
-            break
-          }
-          n = n._parent
-        }
-        if (n === this._root) {
-          n = null
-        }
-      }
-      if (n === this._root) {
-        break
-      }
-    } while (n !== null && (n._deleted || !this._filter(n)))
-    this._currentNode = n
-    if (n === null) {
-      return { done: true }
-    } else {
-      return { value: n, done: false }
-    }
-  }
-}
-
-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)
-        }
-        if (this._domObserver !== null) {
-          this._domObserver.takeRecords()
-        }
-        token = true
-      }
-    }
-  }
-  createTreeWalker (filter) {
-    return new YXmlTreeWalker(this, filter)
-  }
-  /**
-   * Retrieve first element that matches *query*
-   * Similar to DOM's querySelector, but only accepts a subset of its queries
-   *
-   * Query support:
-   *   - tagname
-   * TODO:
-   *   - id
-   *   - attribute
-   */
-  querySelector (query) {
-    query = query.toUpperCase()
-    const iterator = new YXmlTreeWalker(this, element => element.nodeName === query)
-    const next = iterator.next()
-    if (next.done) {
-      return null
-    } else {
-      return next.value
-    }
-  }
-  querySelectorAll (query) {
-    query = query.toUpperCase()
-    return Array.from(new YXmlTreeWalker(this, element => element.nodeName === query))
-  }
-  enableSmartScrolling (scrollElement) {
-    this._scrollElement = scrollElement
-    this.forEach(xml => {
-      xml.enableSmartScrolling(scrollElement)
-    })
-  }
-  setDomFilter (f) {
-    this._domFilter = f
-    this.forEach(xml => {
-      xml.setDomFilter(f)
-    })
-  }
-  _callObserver (transaction, parentSubs, remote) {
-    this._callEventHandler(transaction, new YXmlEvent(this, parentSubs, remote))
-  }
-  toString () {
-    return this.map(xml => xml.toString()).join('')
-  }
-  _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
-    }
-  }
-  insertDomElementsAfter (prev, doms, _document) {
-    const types = domToYXml(this, doms, _document)
-    this.insertAfter(prev, types)
-    return types
-  }
-  insertDomElements (pos, doms, _document) {
-    const types = domToYXml(this, doms, _document)
-    this.insert(pos, types)
-    return types
-  }
-  getDom () {
-    return this._dom
-  }
-  bindToDom (dom, _document) {
-    if (this._dom != null) {
-      this._unbindFromDom()
-    }
-    if (dom._yxml != null) {
-      dom._yxml._unbindFromDom()
-    }
-    dom.innerHTML = ''
-    this.forEach(t => {
-      dom.insertBefore(t.getDom(_document), null)
-    })
-    this._bindToDom(dom, _document)
-  }
-  // binds to a dom element
-  // Only call if dom and YXml are isomorph
-  _bindToDom (dom, _document) {
-    _document = _document || document
-    this._dom = dom
-    dom._yxml = this
-    // TODO: refine this..
-    if ((this.constructor !== YXmlFragment && this._parent !== this._y) || this._parent === null) {
-      // TODO: only top level YXmlFragment can bind. Also allow YXmlElements..
-      return
-    }
-    this._y.on('beforeTransaction', beforeTransactionSelectionFixer)
-    this._y.on('afterTransaction', afterTransactionSelectionFixer)
-    const applyFilter = (type) => {
-      if (type._deleted) {
-        return
-      }
-      // check if type is a child of this
-      let isChild = false
-      let p = type
-      while (p !== this._y) {
-        if (p === this) {
-          isChild = true
-          break
-        }
-        p = p._parent
-      }
-      if (!isChild) {
-        return
-      }
-      // filter attributes
-      let attributes = new Map()
-      if (type.getAttributes !== undefined) {
-        let attrs = type.getAttributes()
-        for (let key in attrs) {
-          attributes.set(key, attrs[key])
-        }
-      }
-      let result = this._domFilter(type.nodeName, new Map(attributes))
-      if (result === null) {
-        type._delete(this._y)
-      } else {
-        attributes.forEach((value, key) => {
-          if (!result.has(key)) {
-            type.removeAttribute(key)
-          }
-        })
-      }
-    }
-    this._y.on('beforeObserverCalls', function (y, transaction) {
-      // apply dom filter to new and changed types
-      transaction.changedTypes.forEach(function (subs, type) {
-        if (subs.size > 1 || !subs.has(null)) {
-          // only apply changes on attributes
-          applyFilter(type)
-        }
-      })
-      transaction.newTypes.forEach(applyFilter)
-    })
-    // Apply Y.Xml events to dom
-    this.observeDeep(events => {
-      reflectChangesOnDom.call(this, events, _document)
-    })
-    // Apply Dom changes on Y.Xml
-    if (typeof MutationObserver !== 'undefined') {
-      this._y.on('beforeTransaction', () => {
-        this._domObserverListener(this._domObserver.takeRecords())
-      })
-      this._domObserverListener = mutations => {
-        this._mutualExclude(() => {
-          this._y.transact(() => {
-            let diffChildren = new Set()
-            mutations.forEach(mutation => {
-              const dom = mutation.target
-              const yxml = dom._yxml
-              if (yxml == null) {
-                // dom element is filtered
-                return
-              }
-              switch (mutation.type) {
-                case 'characterData':
-                  var diffs = diff(yxml.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
-                      yxml.delete(pos, d[1].length)
-                    } else { // INSERT
-                      yxml.insert(pos, d[1])
-                      pos += d[1].length
-                    }
-                  }
-                  break
-                case 'attributes':
-                  if (yxml.constructor === YXmlFragment) {
-                    break
-                  }
-                  let name = mutation.attributeName
-                  let val = dom.getAttribute(name)
-                  // check if filter accepts attribute
-                  let attributes = new Map()
-                  attributes.set(name, val)
-                  if (this._domFilter(dom.nodeName, attributes).size > 0 && yxml.constructor !== YXmlFragment) {
-                    if (yxml.getAttribute(name) !== val) {
-                      if (val == null) {
-                        yxml.removeAttribute(name)
-                      } else {
-                        yxml.setAttribute(name, val)
-                      }
-                    }
-                  }
-                  break
-                case 'childList':
-                  diffChildren.add(mutation.target)
-                  break
-              }
-            })
-            for (let dom of diffChildren) {
-              if (dom._yxml != null && dom._yxml !== false) {
-                applyChangesFromDom(dom)
-              }
-            }
-          })
-        })
-      }
-      this._domObserver = new MutationObserver(this._domObserverListener)
-      this._domObserver.observe(dom, {
-        childList: true,
-        attributes: true,
-        characterData: true,
-        subtree: true
-      })
-    }
-    return dom
-  }
-  _logString () {
-    const left = this._left !== null ? this._left._lastId : null
-    const origin = this._origin !== null ? this._origin._lastId : null
-    return `YXml(id:${logID(this._id)},left:${logID(left)},origin:${logID(origin)},right:${this._right},parent:${logID(this._parent)},parentSub:${this._parentSub})`
-  }
-}

src/Type/y-xml/YXmlText.js

@@ -1,93 +0,0 @@
-import YText from '../YText.js'
-
-export default class YXmlText extends YText {
-  constructor (arg1) {
-    let dom = null
-    let initialText = null
-    if (arg1 != null) {
-      if (arg1.nodeType != null && arg1.nodeType === arg1.TEXT_NODE) {
-        dom = arg1
-        initialText = dom.nodeValue
-      } else if (typeof arg1 === 'string') {
-        initialText = arg1
-      }
-    }
-    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 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)
-        })
-      }
-    })
-    */
-  }
-  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
-  }
-  getDom (_document) {
-    _document = _document || document
-    if (this._dom === null) {
-      const dom = _document.createTextNode(this.toString())
-      this._setDom(dom)
-      return dom
-    }
-    return this._dom
-  }
-  _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
-    }
-  }
-}

src/Type/y-xml/selection.js

@@ -1,81 +0,0 @@
-/* globals getSelection */
-
-import { getRelativePosition, fromRelativePosition } from '../../Util/relativePosition.js'
-
-let browserSelection = null
-let relativeSelection = null
-
-export let beforeTransactionSelectionFixer
-if (typeof getSelection !== 'undefined') {
-  beforeTransactionSelectionFixer = function _beforeTransactionSelectionFixer (y, transaction, remote) {
-    if (!remote) {
-      return
-    }
-    relativeSelection = { from: null, to: null, fromY: null, toY: null }
-    browserSelection = getSelection()
-    const anchorNode = browserSelection.anchorNode
-    if (anchorNode !== null && anchorNode._yxml != null) {
-      const yxml = anchorNode._yxml
-      relativeSelection.from = getRelativePosition(yxml, browserSelection.anchorOffset)
-      relativeSelection.fromY = yxml._y
-    }
-    const focusNode = browserSelection.focusNode
-    if (focusNode !== null && focusNode._yxml != null) {
-      const yxml = focusNode._yxml
-      relativeSelection.to = getRelativePosition(yxml, browserSelection.focusOffset)
-      relativeSelection.toY = yxml._y
-    }
-  }
-} else {
-  beforeTransactionSelectionFixer = function _fakeBeforeTransactionSelectionFixer () {}
-}
-
-export function afterTransactionSelectionFixer (y, transaction, remote) {
-  if (relativeSelection === null || !remote) {
-    return
-  }
-  const to = relativeSelection.to
-  const from = relativeSelection.from
-  const fromY = relativeSelection.fromY
-  const toY = relativeSelection.toY
-  let shouldUpdate = false
-  let anchorNode = browserSelection.anchorNode
-  let anchorOffset = browserSelection.anchorOffset
-  let focusNode = browserSelection.focusNode
-  let focusOffset = browserSelection.focusOffset
-  if (from !== null) {
-    let sel = fromRelativePosition(fromY, from)
-    if (sel !== null) {
-      let node = sel.type.getDom()
-      let offset = sel.offset
-      if (node !== anchorNode || offset !== anchorOffset) {
-        anchorNode = node
-        anchorOffset = offset
-        shouldUpdate = true
-      }
-    }
-  }
-  if (to !== null) {
-    let sel = fromRelativePosition(toY, to)
-    if (sel !== null) {
-      let node = sel.type.getDom()
-      let offset = sel.offset
-      if (node !== focusNode || offset !== focusOffset) {
-        focusNode = node
-        focusOffset = offset
-        shouldUpdate = true
-      }
-    }
-  }
-  if (shouldUpdate) {
-    browserSelection.setBaseAndExtent(
-      anchorNode,
-      anchorOffset,
-      focusNode,
-      focusOffset
-    )
-  }
-  // delete, so the objects can be gc'd
-  relativeSelection = null
-  browserSelection = null
-}

src/Type/y-xml/utils.js

@@ -1,252 +0,0 @@
-import YXmlText from './YXmlText.js'
-
-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
-}
-
-function _insertNodeHelper (yxml, prevExpectedNode, child) {
-  let insertedNodes = yxml.insertDomElementsAfter(prevExpectedNode, [child])
-  if (insertedNodes.length > 0) {
-    return insertedNodes[0]
-  } else {
-    return prevExpectedNode
-  }
-}
-
-/*
- * 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 (dom) {
-  const yxml = dom._yxml
-  const y = yxml._y
-  let knownChildren =
-    new Set(
-      Array.prototype.map.call(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 = 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 = _insertNodeHelper(yxml, prevExpectedNode, child)
-        } 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 = _insertNodeHelper(yxml, prevExpectedNode, child)
-      }
-    } else {
-      // 2.1 A new node was found
-      prevExpectedNode = _insertNodeHelper(yxml, prevExpectedNode, child)
-    }
-  }
-}
-
-export function reflectChangesOnDom (events, _document) {
-  // Make sure that no filtered attributes are applied to the structure
-  // if they were, delete them
-  /*
-  events.forEach(event => {
-    const target = event.target
-    if (event.attributesChanged === undefined) {
-      // event.target is Y.XmlText
-      return
-    }
-    const keys = this._domFilter(target.nodeName, Array.from(event.attributesChanged))
-    if (keys === null) {
-      target._delete()
-    } else {
-      const removeKeys = new Set() // is a copy of event.attributesChanged
-      event.attributesChanged.forEach(key => { removeKeys.add(key) })
-      keys.forEach(key => {
-        // remove all accepted keys from removeKeys
-        removeKeys.delete(key)
-      })
-      // remove the filtered attribute
-      removeKeys.forEach(key => {
-        target.removeAttribute(key)
-      })
-    }
-  })
-  */
-  this._mutualExclude(() => {
-    events.forEach(event => {
-      const yxml = event.target
-      const dom = yxml._dom
-      if (dom != null) {
-        // TODO: do this once before applying stuff
-        // let anchorViewPosition = getAnchorViewPosition(yxml._scrollElement)
-        if (yxml.constructor === YXmlText) {
-          yxml._dom.nodeValue = yxml.toString()
-        } else {
-          // update attributes
-          event.attributesChanged.forEach(attributeName => {
-            const value = yxml.getAttribute(attributeName)
-            if (value === undefined) {
-              dom.removeAttribute(attributeName)
-            } else {
-              dom.setAttribute(attributeName, value)
-            }
-          })
-          if (event.childListChanged) {
-            // create fragment of undeleted nodes
-            const fragment = _document.createDocumentFragment()
-            yxml.forEach(function (t) {
-              fragment.appendChild(t.getDom(_document))
-            })
-            // remove remainding nodes
-            let lastChild = dom.lastChild
-            while (lastChild !== null) {
-              dom.removeChild(lastChild)
-              lastChild = dom.lastChild
-            }
-            // insert fragment of undeleted nodes
-            dom.appendChild(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)
-          }
-        }
-        */
-      }
-    })
-  })
-}

src/Type/y-xml/y-xml.js

@@ -1,9 +0,0 @@
-
-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

src/Util/EventHandler.js

@@ -1,35 +0,0 @@
-
-export default class EventHandler {
-  constructor () {
-    this.eventListeners = []
-  }
-  destroy () {
-    this.eventListeners = null
-  }
-  addEventListener (f) {
-    this.eventListeners.push(f)
-  }
-  removeEventListener (f) {
-    this.eventListeners = this.eventListeners.filter(function (g) {
-      return f !== g
-    })
-  }
-  removeAllEventListeners () {
-    this.eventListeners = []
-  }
-  callEventListeners (transaction, event) {
-    for (var i = 0; i < this.eventListeners.length; i++) {
-      try {
-        const f = this.eventListeners[i]
-        f(event)
-      } catch (e) {
-        /*
-          Your observer threw an error. This error was caught so that Yjs
-          can ensure data consistency! In order to debug this error you
-          have to check "Pause On Caught Exceptions" in developer tools.
-        */
-        console.error(e)
-      }
-    }
-  }
-}

src/Util/ID.js

@@ -1,16 +0,0 @@
-
-export default class ID {
-  constructor (user, clock) {
-    this.user = user
-    this.clock = clock
-  }
-  clone () {
-    return new ID(this.user, this.clock)
-  }
-  equals (id) {
-    return id !== null && id.user === this.user && id.clock === this.clock
-  }
-  lessThan (id) {
-    return this.user < id.user || (this.user === id.user && this.clock < id.clock)
-  }
-}

src/Util/NamedEventHandler.js

@@ -1,46 +0,0 @@
-export default class NamedEventHandler {
-  constructor () {
-    this._eventListener = new Map()
-  }
-  _getListener (name) {
-    let listeners = this._eventListener.get(name)
-    if (listeners === undefined) {
-      listeners = {
-        once: new Set(),
-        on: new Set()
-      }
-      this._eventListener.set(name, listeners)
-    }
-    return listeners
-  }
-  once (name, f) {
-    let listeners = this._getListener(name)
-    listeners.once.add(f)
-  }
-  on (name, f) {
-    let listeners = this._getListener(name)
-    listeners.on.add(f)
-  }
-  off (name, f) {
-    if (name == null || f == null) {
-      throw new Error('You must specify event name and function!')
-    }
-    const listener = this._eventListener.get(name)
-    if (listener !== undefined) {
-      listener.remove(f)
-    }
-  }
-  emit (name, ...args) {
-    const listener = this._eventListener.get(name)
-    if (listener !== undefined) {
-      listener.on.forEach(f => f.apply(null, args))
-      listener.once.forEach(f => f.apply(null, args))
-      listener.once = new Set()
-    } else if (name === 'error') {
-      console.error(args[0])
-    }
-  }
-  destroy () {
-    this._eventListener = null
-  }
-}

src/Util/RootID.js

@@ -1,17 +0,0 @@
-import { getReference } from './structReferences.js'
-
-export const RootFakeUserID = 0xFFFFFF
-
-export default class RootID {
-  constructor (name, typeConstructor) {
-    this.user = RootFakeUserID
-    this.name = name
-    this.type = getReference(typeConstructor)
-  }
-  equals (id) {
-    return id !== null && id.user === this.user && id.name === this.name && id.type === this.type
-  }
-  lessThan (id) {
-    return this.user < id.user || (this.user === id.user && (this.name < id.name || (this.name === id.name && this.type < id.type)))
-  }
-}

src/Util/Tree.js

@@ -1,471 +0,0 @@
-
-class N {
-  // A created node is always red!
-  constructor (val) {
-    this.val = val
-    this.color = true
-    this._left = null
-    this._right = null
-    this._parent = null
-  }
-  isRed () { return this.color }
-  isBlack () { return !this.color }
-  redden () { this.color = true; return this }
-  blacken () { this.color = false; return this }
-  get grandparent () {
-    return this.parent.parent
-  }
-  get parent () {
-    return this._parent
-  }
-  get sibling () {
-    return (this === this.parent.left)
-      ? this.parent.right : this.parent.left
-  }
-  get left () {
-    return this._left
-  }
-  get right () {
-    return this._right
-  }
-  set left (n) {
-    if (n !== null) {
-      n._parent = this
-    }
-    this._left = n
-  }
-  set right (n) {
-    if (n !== null) {
-      n._parent = this
-    }
-    this._right = n
-  }
-  rotateLeft (tree) {
-    var parent = this.parent
-    var newParent = this.right
-    var newRight = this.right.left
-    newParent.left = this
-    this.right = newRight
-    if (parent === null) {
-      tree.root = newParent
-      newParent._parent = null
-    } else if (parent.left === this) {
-      parent.left = newParent
-    } else if (parent.right === this) {
-      parent.right = newParent
-    } else {
-      throw new Error('The elements are wrongly connected!')
-    }
-  }
-  next () {
-    if (this.right !== null) {
-      // search the most left node in the right tree
-      var o = this.right
-      while (o.left !== null) {
-        o = o.left
-      }
-      return o
-    } else {
-      var p = this
-      while (p.parent !== null && p !== p.parent.left) {
-        p = p.parent
-      }
-      return p.parent
-    }
-  }
-  prev () {
-    if (this.left !== null) {
-      // search the most right node in the left tree
-      var o = this.left
-      while (o.right !== null) {
-        o = o.right
-      }
-      return o
-    } else {
-      var p = this
-      while (p.parent !== null && p !== p.parent.right) {
-        p = p.parent
-      }
-      return p.parent
-    }
-  }
-  rotateRight (tree) {
-    var parent = this.parent
-    var newParent = this.left
-    var newLeft = this.left.right
-    newParent.right = this
-    this.left = newLeft
-    if (parent === null) {
-      tree.root = newParent
-      newParent._parent = null
-    } else if (parent.left === this) {
-      parent.left = newParent
-    } else if (parent.right === this) {
-      parent.right = newParent
-    } else {
-      throw new Error('The elements are wrongly connected!')
-    }
-  }
-  getUncle () {
-    // we can assume that grandparent exists when this is called!
-    if (this.parent === this.parent.parent.left) {
-      return this.parent.parent.right
-    } else {
-      return this.parent.parent.left
-    }
-  }
-}
-
-/*
- * This is a Red Black Tree implementation
- */
-export default class Tree {
-  constructor () {
-    this.root = null
-    this.length = 0
-  }
-  findNext (id) {
-    var nextID = id.clone()
-    nextID.clock += 1
-    return this.findWithLowerBound(nextID)
-  }
-  findPrev (id) {
-    let prevID = id.clone()
-    prevID.clock -= 1
-    return this.findWithUpperBound(prevID)
-  }
-  findNodeWithLowerBound (from) {
-    var o = this.root
-    if (o === null) {
-      return null
-    } else {
-      while (true) {
-        if (from === null || (from.lessThan(o.val._id) && o.left !== null)) {
-          // o is included in the bound
-          // try to find an element that is closer to the bound
-          o = o.left
-        } else if (from !== null && o.val._id.lessThan(from)) {
-          // o is not within the bound, maybe one of the right elements is..
-          if (o.right !== null) {
-            o = o.right
-          } else {
-            // there is no right element. Search for the next bigger element,
-            // this should be within the bounds
-            return o.next()
-          }
-        } else {
-          return o
-        }
-      }
-    }
-  }
-  findNodeWithUpperBound (to) {
-    if (to === void 0) {
-      throw new Error('You must define from!')
-    }
-    var o = this.root
-    if (o === null) {
-      return null
-    } else {
-      while (true) {
-        if ((to === null || o.val._id.lessThan(to)) && o.right !== null) {
-          // o is included in the bound
-          // try to find an element that is closer to the bound
-          o = o.right
-        } else if (to !== null && to.lessThan(o.val._id)) {
-          // o is not within the bound, maybe one of the left elements is..
-          if (o.left !== null) {
-            o = o.left
-          } else {
-            // there is no left element. Search for the prev smaller element,
-            // this should be within the bounds
-            return o.prev()
-          }
-        } else {
-          return o
-        }
-      }
-    }
-  }
-  findSmallestNode () {
-    var o = this.root
-    while (o != null && o.left != null) {
-      o = o.left
-    }
-    return o
-  }
-  findWithLowerBound (from) {
-    var n = this.findNodeWithLowerBound(from)
-    return n == null ? null : n.val
-  }
-  findWithUpperBound (to) {
-    var n = this.findNodeWithUpperBound(to)
-    return n == null ? null : n.val
-  }
-  iterate (from, to, f) {
-    var o
-    if (from === null) {
-      o = this.findSmallestNode()
-    } else {
-      o = this.findNodeWithLowerBound(from)
-    }
-    while (
-      o !== null &&
-      (
-        to === null || // eslint-disable-line no-unmodified-loop-condition
-        o.val._id.lessThan(to) ||
-        o.val._id.equals(to)
-      )
-    ) {
-      f(o.val)
-      o = o.next()
-    }
-  }
-  find (id) {
-    let n = this.findNode(id)
-    if (n !== null) {
-      return n.val
-    } else {
-      return null
-    }
-  }
-  findNode (id) {
-    var o = this.root
-    if (o === null) {
-      return null
-    } else {
-      while (true) {
-        if (o === null) {
-          return null
-        }
-        if (id.lessThan(o.val._id)) {
-          o = o.left
-        } else if (o.val._id.lessThan(id)) {
-          o = o.right
-        } else {
-          return o
-        }
-      }
-    }
-  }
-  delete (id) {
-    var d = this.findNode(id)
-    if (d == null) {
-      // throw new Error('Element does not exist!')
-      return
-    }
-    this.length--
-    if (d.left !== null && d.right !== null) {
-      // switch d with the greates element in the left subtree.
-      // o should have at most one child.
-      var o = d.left
-      // find
-      while (o.right !== null) {
-        o = o.right
-      }
-      // switch
-      d.val = o.val
-      d = o
-    }
-    // d has at most one child
-    // let n be the node that replaces d
-    var isFakeChild
-    var child = d.left || d.right
-    if (child === null) {
-      isFakeChild = true
-      child = new N(null)
-      child.blacken()
-      d.right = child
-    } else {
-      isFakeChild = false
-    }
-
-    if (d.parent === null) {
-      if (!isFakeChild) {
-        this.root = child
-        child.blacken()
-        child._parent = null
-      } else {
-        this.root = null
-      }
-      return
-    } else if (d.parent.left === d) {
-      d.parent.left = child
-    } else if (d.parent.right === d) {
-      d.parent.right = child
-    } else {
-      throw new Error('Impossible!')
-    }
-    if (d.isBlack()) {
-      if (child.isRed()) {
-        child.blacken()
-      } else {
-        this._fixDelete(child)
-      }
-    }
-    this.root.blacken()
-    if (isFakeChild) {
-      if (child.parent.left === child) {
-        child.parent.left = null
-      } else if (child.parent.right === child) {
-        child.parent.right = null
-      } else {
-        throw new Error('Impossible #3')
-      }
-    }
-  }
-  _fixDelete (n) {
-    function isBlack (node) {
-      return node !== null ? node.isBlack() : true
-    }
-    function isRed (node) {
-      return node !== null ? node.isRed() : false
-    }
-    if (n.parent === null) {
-      // this can only be called after the first iteration of fixDelete.
-      return
-    }
-    // d was already replaced by the child
-    // d is not the root
-    // d and child are black
-    var sibling = n.sibling
-    if (isRed(sibling)) {
-      // make sibling the grandfather
-      n.parent.redden()
-      sibling.blacken()
-      if (n === n.parent.left) {
-        n.parent.rotateLeft(this)
-      } else if (n === n.parent.right) {
-        n.parent.rotateRight(this)
-      } else {
-        throw new Error('Impossible #2')
-      }
-      sibling = n.sibling
-    }
-    // parent, sibling, and children of n are black
-    if (n.parent.isBlack() &&
-      sibling.isBlack() &&
-      isBlack(sibling.left) &&
-      isBlack(sibling.right)
-    ) {
-      sibling.redden()
-      this._fixDelete(n.parent)
-    } else if (n.parent.isRed() &&
-      sibling.isBlack() &&
-      isBlack(sibling.left) &&
-      isBlack(sibling.right)
-    ) {
-      sibling.redden()
-      n.parent.blacken()
-    } else {
-      if (n === n.parent.left &&
-        sibling.isBlack() &&
-        isRed(sibling.left) &&
-        isBlack(sibling.right)
-      ) {
-        sibling.redden()
-        sibling.left.blacken()
-        sibling.rotateRight(this)
-        sibling = n.sibling
-      } else if (n === n.parent.right &&
-        sibling.isBlack() &&
-        isRed(sibling.right) &&
-        isBlack(sibling.left)
-      ) {
-        sibling.redden()
-        sibling.right.blacken()
-        sibling.rotateLeft(this)
-        sibling = n.sibling
-      }
-      sibling.color = n.parent.color
-      n.parent.blacken()
-      if (n === n.parent.left) {
-        sibling.right.blacken()
-        n.parent.rotateLeft(this)
-      } else {
-        sibling.left.blacken()
-        n.parent.rotateRight(this)
-      }
-    }
-  }
-  put (v) {
-    var node = new N(v)
-    if (this.root !== null) {
-      var p = this.root // p abbrev. parent
-      while (true) {
-        if (node.val._id.lessThan(p.val._id)) {
-          if (p.left === null) {
-            p.left = node
-            break
-          } else {
-            p = p.left
-          }
-        } else if (p.val._id.lessThan(node.val._id)) {
-          if (p.right === null) {
-            p.right = node
-            break
-          } else {
-            p = p.right
-          }
-        } else {
-          p.val = node.val
-          return p
-        }
-      }
-      this._fixInsert(node)
-    } else {
-      this.root = node
-    }
-    this.length++
-    this.root.blacken()
-    return node
-  }
-  _fixInsert (n) {
-    if (n.parent === null) {
-      n.blacken()
-      return
-    } else if (n.parent.isBlack()) {
-      return
-    }
-    var uncle = n.getUncle()
-    if (uncle !== null && uncle.isRed()) {
-      // Note: parent: red, uncle: red
-      n.parent.blacken()
-      uncle.blacken()
-      n.grandparent.redden()
-      this._fixInsert(n.grandparent)
-    } else {
-      // Note: parent: red, uncle: black or null
-      // Now we transform the tree in such a way that
-      // either of these holds:
-      //   1) grandparent.left.isRed
-      //     and grandparent.left.left.isRed
-      //   2) grandparent.right.isRed
-      //     and grandparent.right.right.isRed
-      if (n === n.parent.right && n.parent === n.grandparent.left) {
-        n.parent.rotateLeft(this)
-        // Since we rotated and want to use the previous
-        // cases, we need to set n in such a way that
-        // n.parent.isRed again
-        n = n.left
-      } else if (n === n.parent.left && n.parent === n.grandparent.right) {
-        n.parent.rotateRight(this)
-        // see above
-        n = n.right
-      }
-      // Case 1) or 2) hold from here on.
-      // Now traverse grandparent, make parent a black node
-      // on the highest level which holds two red nodes.
-      n.parent.blacken()
-      n.grandparent.redden()
-      if (n === n.parent.left) {
-        // Case 1
-        n.grandparent.rotateRight(this)
-      } else {
-        // Case 2
-        n.grandparent.rotateLeft(this)
-      }
-    }
-  }
-  flush () {}
-}

src/Util/UndoManager.js

@@ -1,106 +0,0 @@
-import ID from './ID.js'
-
-class ReverseOperation {
-  constructor (y, transaction) {
-    this.created = new Date()
-    const beforeState = transaction.beforeState
-    this.toState = new ID(y.userID, y.ss.getState(y.userID) - 1)
-    if (beforeState.has(y.userID)) {
-      this.fromState = new ID(y.userID, beforeState.get(y.userID))
-    } else {
-      this.fromState = this.toState
-    }
-    this.deletedStructs = transaction.deletedStructs
-  }
-}
-
-function isStructInScope (y, struct, scope) {
-  while (struct !== y) {
-    if (struct === scope) {
-      return true
-    }
-    struct = struct._parent
-  }
-  return false
-}
-
-function applyReverseOperation (y, scope, reverseBuffer) {
-  let performedUndo = false
-  y.transact(() => {
-    while (!performedUndo && reverseBuffer.length > 0) {
-      let undoOp = reverseBuffer.pop()
-      // make sure that it is possible to iterate {from}-{to}
-      y.os.getItemCleanStart(undoOp.fromState)
-      y.os.getItemCleanEnd(undoOp.toState)
-      y.os.iterate(undoOp.fromState, undoOp.toState, op => {
-        if (!op._deleted && isStructInScope(y, op, scope)) {
-          performedUndo = true
-          op._delete(y)
-        }
-      })
-      for (let op of undoOp.deletedStructs) {
-        if (
-          isStructInScope(y, op, scope) &&
-          op._parent !== y &&
-          !op._parent._deleted &&
-          (
-            op._parent._id.user !== y.userID ||
-            op._parent._id.clock < undoOp.fromState.clock ||
-            op._parent._id.clock > undoOp.fromState.clock
-          )
-        ) {
-          performedUndo = true
-          op = op._copy(undoOp.deletedStructs)
-          op._integrate(y)
-        }
-      }
-    }
-  })
-  return performedUndo
-}
-
-export default class UndoManager {
-  constructor (scope, options = {}) {
-    this.options = options
-    options.captureTimeout = options.captureTimeout == null ? 500 : options.captureTimeout
-    this._undoBuffer = []
-    this._redoBuffer = []
-    this._scope = scope
-    this._undoing = false
-    this._redoing = false
-    const y = scope._y
-    this.y = y
-    y.on('afterTransaction', (y, transaction, remote) => {
-      if (!remote && transaction.changedParentTypes.has(scope)) {
-        let reverseOperation = new ReverseOperation(y, transaction)
-        if (!this._undoing) {
-          let lastUndoOp = this._undoBuffer.length > 0 ? this._undoBuffer[this._undoBuffer.length - 1] : null
-          if (lastUndoOp !== null && reverseOperation.created - lastUndoOp.created <= options.captureTimeout) {
-            lastUndoOp.created = reverseOperation.created
-            lastUndoOp.toState = reverseOperation.toState
-            reverseOperation.deletedStructs.forEach(lastUndoOp.deletedStructs.add, lastUndoOp.deletedStructs)
-          } else {
-            this._undoBuffer.push(reverseOperation)
-          }
-          if (!this._redoing) {
-            this._redoBuffer = []
-          }
-        } else {
-          this._redoBuffer.push(reverseOperation)
-        }
-      }
-    })
-  }
-  undo () {
-    this._undoing = true
-    const performedUndo = applyReverseOperation(this.y, this._scope, this._undoBuffer)
-    this._undoing = false
-    return performedUndo
-  }
-  redo () {
-    this._redoing = true
-    const performedRedo = applyReverseOperation(this.y, this._scope, this._redoBuffer)
-    this._redoing = false
-    return performedRedo
-  }
-}

src/Util/YEvent.js

@@ -1,28 +0,0 @@
-
-export default class YEvent {
-  constructor (target) {
-    this.target = target
-    this.currentTarget = target
-  }
-  get path () {
-    const path = []
-    let type = this.target
-    const y = type._y
-    while (type !== this.currentTarget && type !== y) {
-      let parent = type._parent
-      if (type._parentSub !== null) {
-        path.unshift(type._parentSub)
-      } else {
-        // parent is array-ish
-        for (let [i, child] of parent) {
-          if (child === type) {
-            path.unshift(i)
-            break
-          }
-        }
-      }
-      type = parent
-    }
-    return path
-  }
-}

src/Util/defragmentItemContent.js

@@ -1,57 +0,0 @@
-
-import ID from '../Util/ID.js'
-import ItemJSON from '../Struct/ItemJSON.js'
-import ItemString from '../Struct/ItemString.js'
-
-/**
- * Try to merge all items in os with their successors.
- *
- * Some transformations (like delete) fragment items.
- * Item(c: 'ab') + Delete(1,1) + Delete(0, 1) -> Item(c: 'a',deleted);Item(c: 'b',deleted)
- *
- * This functions merges the fragmented nodes together:
- * Item(c: 'a',deleted);Item(c: 'b',deleted) -> Item(c: 'ab', deleted)
- *
- * TODO: The Tree implementation does not support deletions in-spot.
- *       This is why all deletions must be performed after the traversal.
- *
- */
-export function defragmentItemContent (y) {
-  const os = y.os
-  if (os.length < 2) {
-    return
-  }
-  let deletes = []
-  let node = os.findSmallestNode()
-  let next = node.next()
-  while (next !== null) {
-    let a = node.val
-    let b = next.val
-    if (
-      (a instanceof ItemJSON || a instanceof ItemString) &&
-      a.constructor === b.constructor &&
-      a._deleted === b._deleted &&
-      a._right === b &&
-      (new ID(a._id.user, a._id.clock + a._length)).equals(b._id)
-    ) {
-      a._right = b._right
-      if (a instanceof ItemJSON) {
-        a._content = a._content.concat(b._content)
-      } else if (a instanceof ItemString) {
-        a._content += b._content
-      }
-      // delete b later
-      deletes.push(b._id)
-      // do not iterate node!
-      // !(node = next)
-    } else {
-      // not able to merge node, get next node
-      node = next
-    }
-    // update next
-    next = next.next()
-  }
-  for (let i = deletes.length - 1; i >= 0; i--) {
-    os.delete(deletes[i])
-  }
-}

src/Util/generateUserID.js

@@ -1,16 +0,0 @@
-/* global crypto */
-
-export function generateUserID () {
-  if (typeof crypto !== 'undefined' && crypto.getRandomValue != null) {
-    // browser
-    let arr = new Uint32Array(1)
-    crypto.getRandomValues(arr)
-    return arr[0]
-  } else if (typeof crypto !== 'undefined' && crypto.randomBytes != null) {
-    // node
-    let buf = crypto.randomBytes(4)
-    return new Uint32Array(buf.buffer)[0]
-  } else {
-    return Math.ceil(Math.random() * 0xFFFFFFFF)
-  }
-}

src/Util/relativePosition.js

@@ -1,59 +0,0 @@
-import ID from './ID.js'
-import RootID from './RootID.js'
-
-export function getRelativePosition (type, offset) {
-  if (offset === 0) {
-    return ['startof', type._id.user, type._id.clock || null, type._id.name || null, type._id.type || null]
-  } else {
-    let t = type._start
-    while (t !== null) {
-      if (t._length >= offset) {
-        return [t._id.user, t._id.clock + offset - 1]
-      }
-      if (t._right === null) {
-        return [t._id.user, t._id.clock + t._length - 1]
-      }
-      if (!t._deleted) {
-        offset -= t._length
-      }
-      t = t._right
-    }
-    return null
-  }
-}
-
-export function fromRelativePosition (y, rpos) {
-  if (rpos[0] === 'startof') {
-    let id
-    if (rpos[3] === null) {
-      id = new ID(rpos[1], rpos[2])
-    } else {
-      id = new RootID(rpos[3], rpos[4])
-    }
-    return {
-      type: y.os.get(id),
-      offset: 0
-    }
-  } else {
-    let offset = 0
-    let struct = y.os.findNodeWithUpperBound(new ID(rpos[0], rpos[1])).val
-    const parent = struct._parent
-    if (parent._deleted) {
-      return null
-    }
-    if (!struct._deleted) {
-      offset = rpos[1] - struct._id.clock + 1
-    }
-    struct = struct._left
-    while (struct !== null) {
-      if (!struct._deleted) {
-        offset += struct._length
-      }
-      struct = struct._left
-    }
-    return {
-      type: parent,
-      offset: offset
-    }
-  }
-}

src/Util/structReferences.js

@@ -1,37 +0,0 @@
-import YArray from '../Type/YArray.js'
-import YMap from '../Type/YMap.js'
-import YText from '../Type/YText.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'
-
-const structs = new Map()
-const references = new Map()
-
-function addStruct (reference, structConstructor) {
-  structs.set(reference, structConstructor)
-  references.set(structConstructor, reference)
-}
-
-export function getStruct (reference) {
-  return structs.get(reference)
-}
-
-export function getReference (typeConstructor) {
-  return references.get(typeConstructor)
-}
-
-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)

src/Util/writeJSONToType.js

@@ -1,33 +0,0 @@
-
-import YMap from '../Type/YMap'
-import YArray from '../Type/YArray'
-
-export function writeObjectToYMap (object, type) {
-  for (var key in object) {
-    var val = object[key]
-    if (Array.isArray(val)) {
-      type.set(key, YArray)
-      writeArrayToYArray(val, type.get(key))
-    } else if (typeof val === 'object') {
-      type.set(key, YMap)
-      writeObjectToYMap(val, type.get(key))
-    } else {
-      type.set(key, val)
-    }
-  }
-}
-
-export function writeArrayToYArray (array, type) {
-  for (var i = array.length - 1; i >= 0; i--) {
-    var val = array[i]
-    if (Array.isArray(val)) {
-      type.insert(0, [YArray])
-      writeArrayToYArray(val, type.get(0))
-    } else if (typeof val === 'object') {
-      type.insert(0, [YMap])
-      writeObjectToYMap(val, type.get(0))
-    } else {
-      type.insert(0, [val])
-    }
-  }
-}

src/Y.js

@@ -1,174 +0,0 @@
-import DeleteStore from './Store/DeleteStore.js'
-import OperationStore from './Store/OperationStore.js'
-import StateStore from './Store/StateStore.js'
-import { generateUserID } from './Util/generateUserID.js'
-import RootID from './Util/RootID.js'
-import NamedEventHandler from './Util/NamedEventHandler.js'
-import UndoManager from './Util/UndoManager.js'
-
-import { messageToString, messageToRoomname } from './MessageHandler/messageToString.js'
-
-import Connector from './Connector.js'
-import Persistence from './Persistence.js'
-import YArray from './Type/YArray.js'
-import YMap from './Type/YMap.js'
-import YText from './Type/YText.js'
-import { YXmlFragment, YXmlElement, YXmlText } from './Type/y-xml/y-xml.js'
-import BinaryDecoder from './Binary/Decoder.js'
-import { getRelativePosition, fromRelativePosition } from './Util/relativePosition.js'
-
-import debug from 'debug'
-import Transaction from './Transaction.js'
-
-export default class Y extends NamedEventHandler {
-  constructor (opts) {
-    super()
-    this._opts = opts
-    this.userID = opts._userID != null ? opts._userID : generateUserID()
-    this.share = {}
-    this.ds = new DeleteStore(this)
-    this.os = new OperationStore(this)
-    this.ss = new StateStore(this)
-    this.connector = new Y[opts.connector.name](this, opts.connector)
-    if (opts.persistence != null) {
-      this.persistence = new Y[opts.persistence.name](this, opts.persistence)
-      this.persistence.retrieveContent()
-    } else {
-      this.persistence = null
-    }
-    this.connected = true
-    this._missingStructs = new Map()
-    this._readyToIntegrate = []
-    this._transaction = null
-  }
-  _beforeChange () {}
-  transact (f, remote = false) {
-    let initialCall = this._transaction === null
-    if (initialCall) {
-      this._transaction = new Transaction(this)
-      this.emit('beforeTransaction', this, this._transaction, remote)
-    }
-    try {
-      f(this)
-    } catch (e) {
-      console.error(e)
-    }
-    if (initialCall) {
-      this.emit('beforeObserverCalls', this, this._transaction, remote)
-      const transaction = this._transaction
-      this._transaction = null
-      // emit change events on changed types
-      transaction.changedTypes.forEach(function (subs, type) {
-        if (!type._deleted) {
-          type._callObserver(transaction, subs, remote)
-        }
-      })
-      transaction.changedParentTypes.forEach(function (events, type) {
-        if (!type._deleted) {
-          events = events
-            .filter(event =>
-              !event.target._deleted
-            )
-          events
-            .forEach(event => {
-              event.currentTarget = type
-            })
-          // we don't have to check for events.length
-          // because there is no way events is empty..
-          type._deepEventHandler.callEventListeners(transaction, events)
-        }
-      })
-      // when all changes & events are processed, emit afterTransaction event
-      this.emit('afterTransaction', this, transaction, remote)
-    }
-  }
-  // fake _start for root properties (y.set('name', type))
-  get _start () {
-    return null
-  }
-  set _start (start) {
-    return null
-  }
-  get room () {
-    return this._opts.connector.room
-  }
-  define (name, TypeConstructor) {
-    let id = new RootID(name, TypeConstructor)
-    let type = this.os.get(id)
-    if (this.share[name] === undefined) {
-      this.share[name] = type
-    } else if (this.share[name] !== type) {
-      throw new Error('Type is already defined with a different constructor')
-    }
-    return type
-  }
-  get (name) {
-    return this.share[name]
-  }
-  disconnect () {
-    if (this.connected) {
-      this.connected = false
-      return this.connector.disconnect()
-    } else {
-      return Promise.resolve()
-    }
-  }
-  reconnect () {
-    if (!this.connected) {
-      this.connected = true
-      return this.connector.reconnect()
-    } else {
-      return Promise.resolve()
-    }
-  }
-  destroy () {
-    this.share = null
-    if (this.connector.destroy != null) {
-      this.connector.destroy()
-    } else {
-      this.connector.disconnect()
-    }
-    this.os = null
-    this.ds = null
-    this.ss = null
-  }
-  whenSynced () {
-    return new Promise(resolve => {
-      this.once('synced', () => {
-        resolve()
-      })
-    })
-  }
-}
-
-Y.extend = function extendYjs () {
-  for (var i = 0; i < arguments.length; i++) {
-    var f = arguments[i]
-    if (typeof f === 'function') {
-      f(Y)
-    } else {
-      throw new Error('Expected a function!')
-    }
-  }
-}
-
-// TODO: The following assignments should be moved to yjs-dist
-Y.AbstractConnector = Connector
-Y.Persisence = Persistence
-Y.Array = YArray
-Y.Map = YMap
-Y.Text = YText
-Y.XmlElement = YXmlElement
-Y.XmlFragment = YXmlFragment
-Y.XmlText = YXmlText
-
-Y.utils = {
-  BinaryDecoder,
-  UndoManager,
-  getRelativePosition,
-  fromRelativePosition
-}
-
-Y.debug = debug
-debug.formatters.Y = messageToString
-debug.formatters.y = messageToRoomname

src/index.js

@@ -0,0 +1,124 @@
+/** eslint-env browser */
+
+export {
+  Doc,
+  Transaction,
+  YArray as Array,
+  YMap as Map,
+  YText as Text,
+  YXmlText as XmlText,
+  YXmlHook as XmlHook,
+  YXmlElement as XmlElement,
+  YXmlFragment as XmlFragment,
+  YXmlEvent,
+  YMapEvent,
+  YArrayEvent,
+  YTextEvent,
+  YEvent,
+  Item,
+  AbstractStruct,
+  GC,
+  ContentBinary,
+  ContentDeleted,
+  ContentEmbed,
+  ContentFormat,
+  ContentJSON,
+  ContentAny,
+  ContentString,
+  ContentType,
+  AbstractType,
+  getTypeChildren,
+  createRelativePositionFromTypeIndex,
+  createRelativePositionFromJSON,
+  createAbsolutePositionFromRelativePosition,
+  compareRelativePositions,
+  AbsolutePosition,
+  RelativePosition,
+  ID,
+  createID,
+  compareIDs,
+  getState,
+  Snapshot,
+  createSnapshot,
+  createDeleteSet,
+  createDeleteSetFromStructStore,
+  cleanupYTextFormatting,
+  snapshot,
+  emptySnapshot,
+  findRootTypeKey,
+  findIndexSS,
+  getItem,
+  typeListToArraySnapshot,
+  typeMapGetSnapshot,
+  createDocFromSnapshot,
+  iterateDeletedStructs,
+  applyUpdate,
+  applyUpdateV2,
+  readUpdate,
+  readUpdateV2,
+  encodeStateAsUpdate,
+  encodeStateAsUpdateV2,
+  encodeStateVector,
+  UndoManager,
+  decodeSnapshot,
+  encodeSnapshot,
+  decodeSnapshotV2,
+  encodeSnapshotV2,
+  decodeStateVector,
+  logUpdate,
+  logUpdateV2,
+  decodeUpdate,
+  decodeUpdateV2,
+  relativePositionToJSON,
+  isDeleted,
+  isParentOf,
+  equalSnapshots,
+  PermanentUserData, // @TODO experimental
+  tryGc,
+  transact,
+  AbstractConnector,
+  logType,
+  mergeUpdates,
+  mergeUpdatesV2,
+  parseUpdateMeta,
+  parseUpdateMetaV2,
+  encodeStateVectorFromUpdate,
+  encodeStateVectorFromUpdateV2,
+  encodeRelativePosition,
+  decodeRelativePosition,
+  diffUpdate,
+  diffUpdateV2,
+  convertUpdateFormatV1ToV2,
+  convertUpdateFormatV2ToV1,
+  obfuscateUpdate,
+  obfuscateUpdateV2,
+  UpdateEncoderV1
+} from './internals.js'
+
+const glo = /** @type {any} */ (typeof globalThis !== 'undefined'
+  ? globalThis
+  : typeof window !== 'undefined'
+    ? window
+    // @ts-ignore
+    : typeof global !== 'undefined' ? global : {})
+
+const importIdentifier = '__ $YJS$ __'
+
+if (glo[importIdentifier] === true) {
+  /**
+   * Dear reader of this message. Please take this seriously.
+   *
+   * If you see this message, make sure that you only import one version of Yjs. In many cases,
+   * your package manager installs two versions of Yjs that are used by different packages within your project.
+   * Another reason for this message is that some parts of your project use the commonjs version of Yjs
+   * and others use the EcmaScript version of Yjs.
+   *
+   * This often leads to issues that are hard to debug. We often need to perform constructor checks,
+   * e.g. `struct instanceof GC`. If you imported different versions of Yjs, it is impossible for us to
+   * do the constructor checks anymore - which might break the CRDT algorithm.
+   *
+   * https://github.com/yjs/yjs/issues/438
+   */
+  console.error('Yjs was already imported. This breaks constructor checks and will lead to issues! - https://github.com/yjs/yjs/issues/438')
+}
+glo[importIdentifier] = true

src/internals.js

@@ -0,0 +1,43 @@
+
+export * from './utils/AbstractConnector.js'
+export * from './utils/DeleteSet.js'
+export * from './utils/Doc.js'
+export * from './utils/UpdateDecoder.js'
+export * from './utils/UpdateEncoder.js'
+export * from './utils/encoding.js'
+export * from './utils/EventHandler.js'
+export * from './utils/ID.js'
+export * from './utils/isParentOf.js'
+export * from './utils/logging.js'
+export * from './utils/PermanentUserData.js'
+export * from './utils/RelativePosition.js'
+export * from './utils/Snapshot.js'
+export * from './utils/StructStore.js'
+export * from './utils/Transaction.js'
+export * from './utils/UndoManager.js'
+export * from './utils/updates.js'
+export * from './utils/YEvent.js'
+
+export * from './types/AbstractType.js'
+export * from './types/YArray.js'
+export * from './types/YMap.js'
+export * from './types/YText.js'
+export * from './types/YXmlFragment.js'
+export * from './types/YXmlElement.js'
+export * from './types/YXmlEvent.js'
+export * from './types/YXmlHook.js'
+export * from './types/YXmlText.js'
+
+export * from './structs/AbstractStruct.js'
+export * from './structs/GC.js'
+export * from './structs/ContentBinary.js'
+export * from './structs/ContentDeleted.js'
+export * from './structs/ContentDoc.js'
+export * from './structs/ContentEmbed.js'
+export * from './structs/ContentFormat.js'
+export * from './structs/ContentJSON.js'
+export * from './structs/ContentAny.js'
+export * from './structs/ContentString.js'
+export * from './structs/ContentType.js'
+export * from './structs/Item.js'
+export * from './structs/Skip.js'

src/structs/AbstractStruct.js

@@ -0,0 +1,52 @@
+
+import {
+  UpdateEncoderV1, UpdateEncoderV2, ID, Transaction // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error'
+
+export class AbstractStruct {
+  /**
+   * @param {ID} id
+   * @param {number} length
+   */
+  constructor (id, length) {
+    this.id = id
+    this.length = length
+  }
+
+  /**
+   * @type {boolean}
+   */
+  get deleted () {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * Merge this struct with the item to the right.
+   * This method is already assuming that `this.id.clock + this.length === this.id.clock`.
+   * Also this method does *not* remove right from StructStore!
+   * @param {AbstractStruct} right
+   * @return {boolean} wether this merged with right
+   */
+  mergeWith (right) {
+    return false
+  }
+
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder The encoder to write data to.
+   * @param {number} offset
+   * @param {number} encodingRef
+   */
+  write (encoder, offset, encodingRef) {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {number} offset
+   */
+  integrate (transaction, offset) {
+    throw error.methodUnimplemented()
+  }
+}

src/structs/ContentAny.js

@@ -0,0 +1,108 @@
+import {
+  UpdateEncoderV1, UpdateEncoderV2, UpdateDecoderV1, UpdateDecoderV2, Transaction, Item, StructStore // eslint-disable-line
+} from '../internals.js'
+
+export class ContentAny {
+  /**
+   * @param {Array<any>} arr
+   */
+  constructor (arr) {
+    /**
+     * @type {Array<any>}
+     */
+    this.arr = arr
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return this.arr.length
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return this.arr
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentAny}
+   */
+  copy () {
+    return new ContentAny(this.arr)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentAny}
+   */
+  splice (offset) {
+    const right = new ContentAny(this.arr.slice(offset))
+    this.arr = this.arr.slice(0, offset)
+    return right
+  }
+
+  /**
+   * @param {ContentAny} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    this.arr = this.arr.concat(right.arr)
+    return true
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {}
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    const len = this.arr.length
+    encoder.writeLen(len - offset)
+    for (let i = offset; i < len; i++) {
+      const c = this.arr[i]
+      encoder.writeAny(c)
+    }
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 8
+  }
+}
+
+/**
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentAny}
+ */
+export const readContentAny = decoder => {
+  const len = decoder.readLen()
+  const cs = []
+  for (let i = 0; i < len; i++) {
+    cs.push(decoder.readAny())
+  }
+  return new ContentAny(cs)
+}

src/structs/ContentBinary.js

@@ -0,0 +1,92 @@
+import {
+  UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, StructStore, Item, Transaction // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error'
+
+export class ContentBinary {
+  /**
+   * @param {Uint8Array} content
+   */
+  constructor (content) {
+    this.content = content
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return 1
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return [this.content]
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentBinary}
+   */
+  copy () {
+    return new ContentBinary(this.content)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentBinary}
+   */
+  splice (offset) {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * @param {ContentBinary} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    return false
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {}
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    encoder.writeBuf(this.content)
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 3
+  }
+}
+
+/**
+ * @param {UpdateDecoderV1 | UpdateDecoderV2 } decoder
+ * @return {ContentBinary}
+ */
+export const readContentBinary = decoder => new ContentBinary(decoder.readBuf())

src/structs/ContentDeleted.js

@@ -0,0 +1,101 @@
+
+import {
+  addToDeleteSet,
+  UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, StructStore, Item, Transaction // eslint-disable-line
+} from '../internals.js'
+
+export class ContentDeleted {
+  /**
+   * @param {number} len
+   */
+  constructor (len) {
+    this.len = len
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return this.len
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return []
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return false
+  }
+
+  /**
+   * @return {ContentDeleted}
+   */
+  copy () {
+    return new ContentDeleted(this.len)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentDeleted}
+   */
+  splice (offset) {
+    const right = new ContentDeleted(this.len - offset)
+    this.len = offset
+    return right
+  }
+
+  /**
+   * @param {ContentDeleted} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    this.len += right.len
+    return true
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {
+    addToDeleteSet(transaction.deleteSet, item.id.client, item.id.clock, this.len)
+    item.markDeleted()
+  }
+
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    encoder.writeLen(this.len - offset)
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 1
+  }
+}
+
+/**
+ * @private
+ *
+ * @param {UpdateDecoderV1 | UpdateDecoderV2 } decoder
+ * @return {ContentDeleted}
+ */
+export const readContentDeleted = decoder => new ContentDeleted(decoder.readLen())

src/structs/ContentDoc.js

@@ -0,0 +1,141 @@
+
+import {
+  Doc, UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, StructStore, Transaction, Item // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error'
+
+/**
+ * @param {string} guid
+ * @param {Object<string, any>} opts
+ */
+const createDocFromOpts = (guid, opts) => new Doc({ guid, ...opts, shouldLoad: opts.shouldLoad || opts.autoLoad || false })
+
+/**
+ * @private
+ */
+export class ContentDoc {
+  /**
+   * @param {Doc} doc
+   */
+  constructor (doc) {
+    if (doc._item) {
+      console.error('This document was already integrated as a sub-document. You should create a second instance instead with the same guid.')
+    }
+    /**
+     * @type {Doc}
+     */
+    this.doc = doc
+    /**
+     * @type {any}
+     */
+    const opts = {}
+    this.opts = opts
+    if (!doc.gc) {
+      opts.gc = false
+    }
+    if (doc.autoLoad) {
+      opts.autoLoad = true
+    }
+    if (doc.meta !== null) {
+      opts.meta = doc.meta
+    }
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return 1
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return [this.doc]
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentDoc}
+   */
+  copy () {
+    return new ContentDoc(createDocFromOpts(this.doc.guid, this.opts))
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentDoc}
+   */
+  splice (offset) {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * @param {ContentDoc} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    return false
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {
+    // this needs to be reflected in doc.destroy as well
+    this.doc._item = item
+    transaction.subdocsAdded.add(this.doc)
+    if (this.doc.shouldLoad) {
+      transaction.subdocsLoaded.add(this.doc)
+    }
+  }
+
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {
+    if (transaction.subdocsAdded.has(this.doc)) {
+      transaction.subdocsAdded.delete(this.doc)
+    } else {
+      transaction.subdocsRemoved.add(this.doc)
+    }
+  }
+
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) { }
+
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    encoder.writeString(this.doc.guid)
+    encoder.writeAny(this.opts)
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 9
+  }
+}
+
+/**
+ * @private
+ *
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentDoc}
+ */
+export const readContentDoc = decoder => new ContentDoc(createDocFromOpts(decoder.readString(), decoder.readAny()))

src/structs/ContentEmbed.js

@@ -0,0 +1,98 @@
+
+import {
+  UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, StructStore, Item, Transaction // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error'
+
+/**
+ * @private
+ */
+export class ContentEmbed {
+  /**
+   * @param {Object} embed
+   */
+  constructor (embed) {
+    this.embed = embed
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return 1
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return [this.embed]
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentEmbed}
+   */
+  copy () {
+    return new ContentEmbed(this.embed)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentEmbed}
+   */
+  splice (offset) {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * @param {ContentEmbed} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    return false
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {}
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    encoder.writeJSON(this.embed)
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 5
+  }
+}
+
+/**
+ * @private
+ *
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentEmbed}
+ */
+export const readContentEmbed = decoder => new ContentEmbed(decoder.readJSON())

src/structs/ContentFormat.js

@@ -0,0 +1,103 @@
+
+import {
+  AbstractType, UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, Item, StructStore, Transaction // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error'
+
+/**
+ * @private
+ */
+export class ContentFormat {
+  /**
+   * @param {string} key
+   * @param {Object} value
+   */
+  constructor (key, value) {
+    this.key = key
+    this.value = value
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return 1
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return []
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return false
+  }
+
+  /**
+   * @return {ContentFormat}
+   */
+  copy () {
+    return new ContentFormat(this.key, this.value)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentFormat}
+   */
+  splice (offset) {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * @param {ContentFormat} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    return false
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {
+    // @todo searchmarker are currently unsupported for rich text documents
+    /** @type {AbstractType<any>} */ (item.parent)._searchMarker = null
+  }
+
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    encoder.writeKey(this.key)
+    encoder.writeJSON(this.value)
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 6
+  }
+}
+
+/**
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentFormat}
+ */
+export const readContentFormat = decoder => new ContentFormat(decoder.readKey(), decoder.readJSON())

src/structs/ContentJSON.js

@@ -0,0 +1,118 @@
+import {
+  UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, Transaction, Item, StructStore // eslint-disable-line
+} from '../internals.js'
+
+/**
+ * @private
+ */
+export class ContentJSON {
+  /**
+   * @param {Array<any>} arr
+   */
+  constructor (arr) {
+    /**
+     * @type {Array<any>}
+     */
+    this.arr = arr
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return this.arr.length
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return this.arr
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentJSON}
+   */
+  copy () {
+    return new ContentJSON(this.arr)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentJSON}
+   */
+  splice (offset) {
+    const right = new ContentJSON(this.arr.slice(offset))
+    this.arr = this.arr.slice(0, offset)
+    return right
+  }
+
+  /**
+   * @param {ContentJSON} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    this.arr = this.arr.concat(right.arr)
+    return true
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {}
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    const len = this.arr.length
+    encoder.writeLen(len - offset)
+    for (let i = offset; i < len; i++) {
+      const c = this.arr[i]
+      encoder.writeString(c === undefined ? 'undefined' : JSON.stringify(c))
+    }
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 2
+  }
+}
+
+/**
+ * @private
+ *
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentJSON}
+ */
+export const readContentJSON = decoder => {
+  const len = decoder.readLen()
+  const cs = []
+  for (let i = 0; i < len; i++) {
+    const c = decoder.readString()
+    if (c === 'undefined') {
+      cs.push(undefined)
+    } else {
+      cs.push(JSON.parse(c))
+    }
+  }
+  return new ContentJSON(cs)
+}

src/structs/ContentString.js

@@ -0,0 +1,112 @@
+import {
+  UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, Transaction, Item, StructStore // eslint-disable-line
+} from '../internals.js'
+
+/**
+ * @private
+ */
+export class ContentString {
+  /**
+   * @param {string} str
+   */
+  constructor (str) {
+    /**
+     * @type {string}
+     */
+    this.str = str
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return this.str.length
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return this.str.split('')
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentString}
+   */
+  copy () {
+    return new ContentString(this.str)
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentString}
+   */
+  splice (offset) {
+    const right = new ContentString(this.str.slice(offset))
+    this.str = this.str.slice(0, offset)
+
+    // Prevent encoding invalid documents because of splitting of surrogate pairs: https://github.com/yjs/yjs/issues/248
+    const firstCharCode = this.str.charCodeAt(offset - 1)
+    if (firstCharCode >= 0xD800 && firstCharCode <= 0xDBFF) {
+      // Last character of the left split is the start of a surrogate utf16/ucs2 pair.
+      // We don't support splitting of surrogate pairs because this may lead to invalid documents.
+      // Replace the invalid character with a unicode replacement character (<28> / U+FFFD)
+      this.str = this.str.slice(0, offset - 1) + '<27>'
+      // replace right as well
+      right.str = '<27>' + right.str.slice(1)
+    }
+    return right
+  }
+
+  /**
+   * @param {ContentString} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    this.str += right.str
+    return true
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {}
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {}
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {}
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    encoder.writeString(offset === 0 ? this.str : this.str.slice(offset))
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 4
+  }
+}
+
+/**
+ * @private
+ *
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentString}
+ */
+export const readContentString = decoder => new ContentString(decoder.readString())

src/structs/ContentType.js

@@ -0,0 +1,172 @@
+
+import {
+  readYArray,
+  readYMap,
+  readYText,
+  readYXmlElement,
+  readYXmlFragment,
+  readYXmlHook,
+  readYXmlText,
+  UpdateDecoderV1, UpdateDecoderV2, UpdateEncoderV1, UpdateEncoderV2, StructStore, Transaction, Item, YEvent, AbstractType // eslint-disable-line
+} from '../internals.js'
+
+import * as error from 'lib0/error'
+
+/**
+ * @type {Array<function(UpdateDecoderV1 | UpdateDecoderV2):AbstractType<any>>}
+ * @private
+ */
+export const typeRefs = [
+  readYArray,
+  readYMap,
+  readYText,
+  readYXmlElement,
+  readYXmlFragment,
+  readYXmlHook,
+  readYXmlText
+]
+
+export const YArrayRefID = 0
+export const YMapRefID = 1
+export const YTextRefID = 2
+export const YXmlElementRefID = 3
+export const YXmlFragmentRefID = 4
+export const YXmlHookRefID = 5
+export const YXmlTextRefID = 6
+
+/**
+ * @private
+ */
+export class ContentType {
+  /**
+   * @param {AbstractType<any>} type
+   */
+  constructor (type) {
+    /**
+     * @type {AbstractType<any>}
+     */
+    this.type = type
+  }
+
+  /**
+   * @return {number}
+   */
+  getLength () {
+    return 1
+  }
+
+  /**
+   * @return {Array<any>}
+   */
+  getContent () {
+    return [this.type]
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isCountable () {
+    return true
+  }
+
+  /**
+   * @return {ContentType}
+   */
+  copy () {
+    return new ContentType(this.type._copy())
+  }
+
+  /**
+   * @param {number} offset
+   * @return {ContentType}
+   */
+  splice (offset) {
+    throw error.methodUnimplemented()
+  }
+
+  /**
+   * @param {ContentType} right
+   * @return {boolean}
+   */
+  mergeWith (right) {
+    return false
+  }
+
+  /**
+   * @param {Transaction} transaction
+   * @param {Item} item
+   */
+  integrate (transaction, item) {
+    this.type._integrate(transaction.doc, item)
+  }
+
+  /**
+   * @param {Transaction} transaction
+   */
+  delete (transaction) {
+    let item = this.type._start
+    while (item !== null) {
+      if (!item.deleted) {
+        item.delete(transaction)
+      } else {
+        // This will be gc'd later and we want to merge it if possible
+        // We try to merge all deleted items after each transaction,
+        // but we have no knowledge about that this needs to be merged
+        // since it is not in transaction.ds. Hence we add it to transaction._mergeStructs
+        transaction._mergeStructs.push(item)
+      }
+      item = item.right
+    }
+    this.type._map.forEach(item => {
+      if (!item.deleted) {
+        item.delete(transaction)
+      } else {
+        // same as above
+        transaction._mergeStructs.push(item)
+      }
+    })
+    transaction.changed.delete(this.type)
+  }
+
+  /**
+   * @param {StructStore} store
+   */
+  gc (store) {
+    let item = this.type._start
+    while (item !== null) {
+      item.gc(store, true)
+      item = item.right
+    }
+    this.type._start = null
+    this.type._map.forEach(/** @param {Item | null} item */ (item) => {
+      while (item !== null) {
+        item.gc(store, true)
+        item = item.left
+      }
+    })
+    this.type._map = new Map()
+  }
+
+  /**
+   * @param {UpdateEncoderV1 | UpdateEncoderV2} encoder
+   * @param {number} offset
+   */
+  write (encoder, offset) {
+    this.type._write(encoder)
+  }
+
+  /**
+   * @return {number}
+   */
+  getRef () {
+    return 7
+  }
+}
+
+/**
+ * @private
+ *
+ * @param {UpdateDecoderV1 | UpdateDecoderV2} decoder
+ * @return {ContentType}
+ */
+export const readContentType = decoder => new ContentType(typeRefs[decoder.readTypeRef()](decoder))