bumb version

.bowerrc

@@ -0,0 +1,3 @@
+{
+ "directory": "../"
+}

.gitignore

@@ -1,4 +1,6 @@
-node_modules
-dist
-.vscode
-docs
+/node_modules/
+bower_components
+.directory
+.c9
+.codio
+.settings

.jsdoc.json

@@ -1,50 +0,0 @@
-{
-  "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": {
-      "y-js.org": "yjs.website"
-    },
-    "logo": {
-      "url": "https://user-images.githubusercontent.com/5553757/48975307-61efb100-f06d-11e8-9177-ee895e5916e5.png",
-      "width": "162px",
-      "height": "162px",
-      "link": "/"
-    },
-    "tabNames": {
-      "api": "API",
-      "tutorials": "Examples"
-    },
-    "footerText": "Shared Editing",
-    "css": [
-      "./style.css"
-    ],
-    "default": {
-      "staticFiles": {
-          "include": ["examples/"]
-      }
-    }
-  },
-  "opts": {
-    "destination": "./docs/",
-    "encoding": "utf8",
-    "private": false,
-    "recurse": true,
-    "template": "./node_modules/tui-jsdoc-template",
-    "tutorials": "./examples"
-  }
-}

.travis.yml

@@ -0,0 +1,11 @@
+language: node_js
+before_install:
+  - "npm install -g bower coffee-script"
+  - "bower install"
+node_js:
+  - "0.12"
+  - "0.11"
+  - "0.10"
+branches:
+  only:
+    - master

LICENSE.txt

@@ -1,8 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014
-  - Kevin Jahns <kevin.jahns@rwth-aachen.de>.
-  - Chair of Computer Science 5 (Databases & Information Systems), RWTH Aachen University, Germany
+Copyright (c) 2014 Kevin Jahns <kevin.jahns@rwth-aachen.de>.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,300 +1,137 @@
 
-# ![Yjs](https://user-images.githubusercontent.com/5553757/48975307-61efb100-f06d-11e8-9177-ee895e5916e5.png)
+# ![Yjs](http://y-js.org/files/layout/yjs.svg)
 
-Yjs is a framework for offline-first p2p shared editing on structured data like
-text, richtext, json, or XML. It is fairly easy to get started, as Yjs hides
-most of the complexity of concurrent editing. For additional information, demos,
-and tutorials visit [y-js.org](http://y-js.org/).
+[![Build Status](https://travis-ci.org/y-js/yjs.svg)](https://travis-ci.org/y-js/yjs)
 
-:warning: Checkout the [v13 docs](./README.v13.md) for the upcoming release :warning:
+Yjs is a framework for optimistic concurrency control and automatic conflict resolution on arbitrary data types. The framework implements a new OT-like concurrency algorithm and provides similar functionality as [ShareJs] and [OpenCoweb]. Yjs was designed to handle concurrent actions on arbitrary complex data types like Text, Json, and XML. We provide a tutorial and some applications for this framework on our [homepage](http://y-js.org/).
 
-### Extensions
-Yjs only knows how to resolve conflicts on shared data. You have to choose a ..
-* *Connector* - a communication protocol that propagates changes to the clients
-* *Database* - a database to store your changes
-* one or more *Types* - that represent the shared data
+You can create you own data types easily. Therefore, you can take matters into your own hand by defining the meaning of the shared types and ensure that it is valid, while Yjs ensures data consistency (everyone will eventually end up with the same data). We already provide data types for
 
-Connectors, Databases, and Types are available as modules that extend Yjs. Here
-is a list of the modules we know of:
+| Name                                                 | Description
+| ---------------------------------------------------- | ---------------------------------------------
+y-object | Add, update, and remove properties of an object. Circular references are supported. Included in Yjs
+[y-list](https://github.com/y-js/y-list) | A shared linked list implementation. Circular references are supported
+[y-selections](https://github.com/y-js/y-selections) | Manages selections on types that use linear structures (e.g. the y-list type). You can select a range of elements and assign meaning to them.
+[y-xml](https://github.com/y-js/y-xml) | An implementation of the DOM. You can create a two way binding to Browser DOM objects
+[y-text](https://github.com/y-js/y-text) | Collaborate on text. You can create a two way binding to textareas, input elements, or HTML elements (e.g. *h1*, or *p*)
+[y-richtext](https://github.com/y-js/y-richtext) | Collaborate on rich text. You can create a two way binding to several editors
 
-##### Connectors
+Unlike other frameworks, Yjs supports P2P message propagation and is not bound to a specific communication protocol. Therefore, Yjs is extremely scalable and can be used in a wide range of application scenarios.
 
-|Name            | Description               |
-|----------------|-----------------------------------|
-|[webrtc](https://github.com/y-js/y-webrtc) | Propagate updates Browser2Browser via WebRTC|
-|[websockets](https://github.com/y-js/y-websockets-client) | Set up [a central server](https://github.com/y-js/y-websockets-client), and connect to it via websockets |
-|[xmpp](https://github.com/y-js/y-xmpp) | Propagate updates in a XMPP multi-user-chat room ([XEP-0045](http://xmpp.org/extensions/xep-0045.html))|
-|[ipfs](https://github.com/ipfs-labs/y-ipfs-connector) | Connector for the [Interplanetary File System](https://ipfs.io/)!|
-|[test](https://github.com/y-js/y-test) | A Connector for testing purposes. It is designed to simulate delays that happen in worst case scenarios|
+We support several communication protocols as so called *Connectors*. You can create your own connector too - read [this wiki page](https://github.com/y-js/yjs/wiki/Custom-Connectors). Currently, we support the following communication protocols:
 
-##### Database adapters
-
-|Name            | Description               |
-|----------------|-----------------------------------|
-|[memory](https://github.com/y-js/y-memory) | In-memory storage. |
-|[indexeddb](https://github.com/y-js/y-indexeddb) | Offline storage for the browser |
-|[leveldb](https://github.com/y-js/y-leveldb) | Persistent storage for node apps |
+Name                                     | Description
+---------------------------------------- | -------------------------------------------------------
+[y-xmpp](https://github.com/y-js/y-xmpp) | Propagate updates in a XMPP multi-user-chat room ([XEP-0045](http://xmpp.org/extensions/xep-0045.html))
+[y-webrtc](https://github.com/y-js/y-webrtc) | Propagate updates Browser2Browser via WebRTC
+[y-test](https://github.com/y-js/y-test) | A Connector for testing purposes. It is designed to simulate delays that happen in worst case scenarios
 
 
-##### Types
+You can use Yjs client-, and server- side. You can get it as via npm, and bower. We even provide polymer elements for Yjs!
 
-| Name     | Description       |
-|----------|-------------------|
-|[map](https://github.com/y-js/y-map) | A shared Map implementation. Maps from text to any stringify-able object |
-|[array](https://github.com/y-js/y-array) | A shared Array implementation |
-|[xml](https://github.com/y-js/y-xml) | An implementation of the DOM. You can create a two way binding to Browser DOM objects |
-|[text](https://github.com/y-js/y-text) | Collaborate on text. Supports two way binding to the [Ace Editor](https://ace.c9.io), [CodeMirror](https://codemirror.net/), [Monaco](https://github.com/Microsoft/monaco-editor), textareas, input elements, and HTML elements (e.g. <*h1*>, or <*p*>) |
-|[richtext](https://github.com/y-js/y-richtext) | Collaborate on rich text. Supports two way binding to the [Quill Rich Text Editor](http://quilljs.com/)|
+The advantages over similar frameworks are support for
+* .. P2P message propagation and arbitrary communication protocols
+* .. arbitrary complex data types
+* .. offline editing: Only relevant changes are propagated on rejoin (unimplemented)
+* .. AnyUndo: Undo *any* action that was executed in constant time (unimplemented)
+* .. Intention Preservation: When working on Text, the intention of your changes are preserved. This is particularily important when working offline. Every type has a notion on how we define Intention Preservation on it.
 
-##### Other
-
-| Name      | Description       |
-|-----------|-------------------|
-|[y-element](http://y-js.org/y-element/) | Yjs Polymer Element |
 
 ## Use it!
-Install Yjs, and its modules with [bower](http://bower.io/), or
-[npm](https://www.npmjs.org/package/yjs).
+You can find a tutorial, and examples on the [website](http://y-js.org). Furthermore, the [github wiki](https://github.com/y-js/yjs/wiki) offers more information about how you can use Yjs in your application.
+
+Either clone this git repository, install it with [bower](http://bower.io/), or install it with [npm](https://www.npmjs.org/package/yjs).
 
 ### Bower
 ```
-bower install --save yjs y-array % add all y-* modules you want to use
+bower install y-js/yjs
 ```
-You only need to include the `y.js` file. Yjs is able to automatically require
-missing modules.  
+Then you include the libraries directly from the installation folder.
 ```
 <script src="./bower_components/yjs/y.js"></script>
 ```
 
-### CDN
-```
-<script src="https://cdn.jsdelivr.net/npm/yjs@12/dist/y.js"></script>
-<script src="https://cdn.jsdelivr.net/npm/y-array@10/dist/y-array.js"></script>
-<script src="https://cdn.jsdelivr.net/npm/y-websockets-client@8/dist/y-websockets-client.js"></script>
-<script src="https://cdn.jsdelivr.net/npm/y-memory@8/dist/y-memory.js"></script>
-<script src="https://cdn.jsdelivr.net/npm/y-map@10/dist/y-map.js"></script>
-<script src="https://cdn.jsdelivr.net/npm/y-text@9/dist/y-text.js"></script>
-// ..
-// do the same for all modules you want to use
-```
-
 ### Npm
 ```
-npm install --save yjs % add all y-* modules you want to use
+npm install yjs --save
 ```
 
-If you don't include via script tag, you have to explicitly include all modules!
-(Same goes for other module systems)
+And use it like this with *npm*:
 ```
-var Y = require('yjs')
-require('y-array')(Y) // add the y-array type to Yjs
-require('y-websockets-client')(Y)
-require('y-memory')(Y)
-require('y-map')(Y)
-require('y-text')(Y)
-// ..
-// do the same for all modules you want to use
+Y = require("yjs");
 ```
 
-### ES6 Syntax
+# Y()
+In order to create an instance of Y, you need to have a connection object (instance of a Connector). Then, you can create a shared data type like this:
 ```
-import Y from 'yjs'
-import yArray from 'y-array'
-import yWebsocketsClient from 'y-webrtc'
-import yMemory from 'y-memory'
-import yMap from 'y-map'
-import yText from 'y-text'
-// ..
-Y.extend(yArray, yWebsocketsClient, yMemory, yArray, yMap, yText /*, .. */)
+var y = new Y(connector);
 ```
 
-# Text editing example
-Install dependencies
+
+# Y.Object
+Yjs includes only one type by default - the Y.Object type. It mimics the behaviour of a JSON Object. You can create, update, and remove properies on the Y.Object type. Furthermore, you can observe changes on this type as you can observe changes on Javascript Objects with [Object.observe](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/observe) - an ECMAScript 7 proposal which is likely to become accepted by the committee. Until then, we have our own implementation.
+
+
+##### Reference
+* Create
 ```
-bower i yjs y-memory y-webrtc y-array y-text
+var y = new Y.Object();
 ```
-
-Here is a simple example of a shared textarea
-```HTML
-  <!DOCTYPE html>
-  <html>
-    <body>
-      <script src="./bower_components/yjs/y.js"></script>
-      <!-- Yjs automatically includes all missing dependencies (browser only) -->
-      <script>
-        Y({
-          db: {
-            name: 'memory' // use memory database adapter.
-            // name: 'indexeddb' // use indexeddb database adapter instead for offline apps
-          },
-          connector: {
-            name: 'webrtc', // use webrtc connector
-            // name: 'websockets-client'
-            // name: 'xmpp'
-            room: 'my-room' // clients connecting to the same room share data
-          },
-          sourceDir: './bower_components', // location of the y-* modules (browser only)
-          share: {
-            textarea: 'Text' // y.share.textarea is of type y-text
-          }
-        }).then(function (y) {
-          // The Yjs instance `y` is available
-          // y.share.* contains the shared types
-
-          // Bind `y.share.textarea` to `<textarea/>`
-          y.share.textarea.bind(document.querySelector('textarea'))
-        })
-      </script>
-      <textarea></textarea>
-    </body>
-  </html>
+* Create with existing Object
 ```
-
-## Get Help & Give Help
-There are some friendly people on [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/y-js/yjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) who are eager to help, and answer questions. Please join!
-
-Report _any_ issues to the
-[Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very
-soon, if possible.
-
-# API
-
-### Y(options)
-* Y.extend(module1, module2, ..)
-  * Add extensions to Y
-  * `Y.extend(require('y-webrtc'))` has the same semantics as
-    `require('y-webrtc')(Y)`
-* options.db
-  * Will be forwarded to the database adapter. Specify the database adaper on
-    `options.db.name`.
-  * Have a look at the used database adapter repository to see all available
-    options.
-* options.connector
-  * Will be forwarded to the connector adapter. Specify the connector adaper on
-    `options.connector.name`.
-  * All our connectors implement a `room` property. Clients that specify the
-    same room share the same data.
-  * All of our connectors specify an `url` property that defines the connection
-    endpoint of the used connector.
-    * All of our connectors also have a default connection endpoint that you can
-      use for development.
-  * Set `options.connector.generateUserId = true` in order to genenerate a
-    userid, instead of receiving one from the server. This way the `Y(..)` is
-    immediately going to be resolved, without waiting for any confirmation from
-    the server. Use with caution.
-  * Have a look at the used connector repository to see all available options.
-  * *Only if you know what you are doing:* Set
-    `options.connector.preferUntransformed = true` in order receive the shared
-    data untransformed. This is very efficient as the database content is simply
-    copied to this client. This does only work if this client receives content
-    from only one client.
-* options.sourceDir (browser only)
-  * Path where all y-* modules are stored
-  * Defaults to `/bower_components`
-  * Not required when running on `nodejs` / `iojs`
-  * When using nodejs you need to manually extend Yjs:
+var y = new Y.Object({number: 73});
 ```
-var Y = require('yjs')
-// you have to require a db, connector, and *all* types you use!
-require('y-memory')(Y)
-require('y-webrtc')(Y)
-require('y-map')(Y)
-// ..
+* Every instance of Y is an Y.Object
 ```
-* options.share
-  * Specify on `options.share[arbitraryName]` types that are shared among all
-    users.
-  * E.g. Specify `options.share[arbitraryName] = 'Array'` to require y-array and
-    create an y-array type on `y.share[arbitraryName]`.
-  * If userA doesn't specify `options.share[arbitraryName]`, it won't be
-    available for userA.
-  * If userB specifies `options.share[arbitraryName]`, it still won't be
-    available for userA. But all the updates are send from userB to userA.
-  * In contrast to y-map, types on `y.share.*` cannot be overwritten or deleted.
-    Instead, they are merged among all users. This feature is only available on
-    `y.share.*`
-  * Weird behavior: It is supported that two users specify different types with
-    the same property name.
-     E.g. userA specifies `options.share.x = 'Array'`, and userB specifies
-     `options.share.x = 'Text'`. But they only share data if they specified the
-     same type with the same property name
-* options.type (browser only)
-  * Array of modules that Yjs needs to require, before instantiating a shared
-    type.
-  * By default Yjs requires the specified database adapter, the specified
-    connector, and all modules that are used in `options.share.*`
-  * Put all types here that you intend to use, but are not used in y.share.*
-
-### Instantiated Y object (y)
-`Y(options)` returns a promise that is fulfilled when..
-
-* All modules are loaded
-  * The specified database adapter is loaded
-  * The specified connector is loaded
-  * All types are included
-* The connector is initialized, and a unique user id is set (received from the
-  server)
-  * Note: When using y-indexeddb, a retrieved user id is stored on `localStorage`
-
-The promise returns an instance of Y. We denote it with a lower case `y`.
-
-* y.share.*
-  * Instances of the types you specified on options.share.*
-  * y.share.* can only be defined once when you instantiate Y!
-* y.connector is an instance of Y.AbstractConnector
-* y.connector.onUserEvent(function (event) {..})
-  * Observe user events (event.action is either 'userLeft' or 'userJoined')
-* y.connector.whenSynced(listener)
-  * `listener` is executed when y synced with at least one user.
-  * `listener` is not called when no other user is in the same room.
-  * y-websockets-client aways waits to sync with the server
-* y.connector.disconnect()
-  * Force to disconnect this instance from the other instances
-* y.connector.connect()
-  * Try to reconnect to the other instances (needs to be supported by the
-    connector)
-  * Not supported by y-xmpp
-* y.close()
-  * Destroy this object.
-  * Destroys all types (they will throw weird errors if you still use them)
-  * Disconnects from the other instances (via connector)
-  * Returns a promise
-* y.destroy()
-  * calls y.close()
-  * Removes all data from the database
-  * Returns a promise
-* y.db.stopGarbageCollector()
-  * Stop the garbage collector. Call y.db.garbageCollect() to continue garbage
-    collection
-* y.db.gc :: Boolean
-  * Whether gc is turned on
-* y.db.gcTimeout :: Number (defaults to 50000 ms)
-  * Time interval between two garbage collect cycles
-  * It is required that all instances exchanged all messages after two garbage
-    collect cycles (after 100000 ms per default)
-* y.db.userId :: String
-  * The used user id for this client. **Never overwrite this**
-
-### Logging
-Yjs uses [debug](https://github.com/visionmedia/debug) for logging. The flag
-`y*` enables logging for all y-* components. You can selectively remove
-components you are not interested in: E.g. The flag `y*,-y:connector-message`
-will not log the long `y:connector-message` messages.
-
-##### Enable logging in Node.js
-```sh
-DEBUG=y* node app.js
+var y = new Y(connector);
 ```
+* .val()
+  * Retrieve all properties of this type as a JSON Object
+* .val(name)
+  * Retrieve the value of a property
+* .val(name, value)
+  * Set/update a property. Returns `this` Y.Object
+* .delete(name)
+  * Delete a property
+* .observe(observer)
+  * The `observer` is called whenever something on this object changes. Throws *add*, *update*, and *delete* events
+* .unobserve(f)
+  * Delete an observer
 
-Remove the colors in order to log to a file:
-```sh
-DEBUG_COLORS=0 DEBUG=y* node app.js > log
-```
+# A note on intention preservation
+When users create/update/delete the same property concurrently, only one change will prevail. Changes on different properties do not conflict with each other.
 
-##### Enable logging in the browser
-```js
-localStorage.debug = 'y*'
-```
+# A note on time complexities
+* .val()
+  * O(|properties|)
+* .val(name)
+  * O(1)
+* .val(name, value)
+  * O(1)
+* .delete(name)
+  * O(1)
+* Apply a delete operation from another user
+  * O(1)
+* Apply an update operation from another user (set/update a property)
+  * Yjs does not transform against operations that do not conflict with each other.
+  * An operation conflicts with another operation if it changes the same property.
+  * Overall worst case complexety: O(|conflicts|!)
+
+# Status
+Yjs is a work in progress. Different versions of the *y-* repositories may not work together. Just drop me a line if you run into troubles.
+
+## Get help
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/y-js/yjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
+Please report _any_ issues to the [Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very soon, if possible.
+
+## Contribution
+I created this framework during my bachelor thesis at the chair of computer science 5 [(i5)](http://dbis.rwth-aachen.de/cms), RWTH University. Since December 2014 I'm working on Yjs as a part of my student worker job at the i5.
 
 ## License
-Yjs is licensed under the [MIT License](./LICENSE).
+Yjs is licensed under the [MIT License](./LICENSE.txt).
+
+<yjs@dbis.rwth-aachen.de>
+
+[ShareJs]: https://github.com/share/ShareJS
+[OpenCoweb]: https://github.com/opencoweb/coweb

README.v13.md

@@ -1,404 +0,0 @@
-# ![Yjs](https://user-images.githubusercontent.com/5553757/48975307-61efb100-f06d-11e8-9177-ee895e5916e5.png)
-> The shared editing library
-
-Yjs is a library for automatic conflict resolution on shared state. It implements an [operation-based CRDT](#Yjs-CRDT-Algorithm) and exposes its internal model as shared types. Shared types are common data types like `Map` or `Array` with superpowers: changes are automatically distributed to other peers and merged without merge conflicts.
-
-Yjs is **network agnostic** (p2p!), supports many existing **rich text editors**, **offline editing**, **version snapshots**, **shared cursors**, and encodes update messages using **binary protocol encoding**.
-
-* Chat: [https://gitter.im/y-js/yjs](https://gitter.im/y-js/yjs)
-* Demos: [https://github.com/y-js/yjs-demos](https://github.com/y-js/yjs-demos)
-* API Docs: [https://yjs.website/](https://yjs.website/)
-
-# Table of Contents
-
-* [Overview](#Overview)
-  * [Bindings](#Bindings)
-  * [Providers](#Providers)
-* [Getting Started](#Getting-Started)
-* [API](#API)
-* [Transaction](#Transaction)
-* [Offline Editing](#Offline-Editing)
-* [Awareness](#Awareness)
-* [Working with Yjs](#Working-with-Yjs)
-  * [Typescript Declarations](#Typescript-Declarations)
-* [Binary Protocols](#Binary-Protocols)
-  * [Sync Protocol](#Sync-Protocols)
-  * [Awareness Protocol](#Awareness-Protocols)
-  * [Auth Protocol](#Auth-Protocol)
-* [Yjs CRDT Algorithm](#Yjs-CRDT-Algorithm)
-* [Evaluation](#Evaluation)
-  * [Existing shared editing libraries](#Exisisting-Javascript-Products)
-  * [CRDT Algorithms](#CRDT-Algorithms)
-  * [Comparison of CRDT with OT](#Comparing-CRDT-with-OT)
-  * [Comparison of CRDT Algorithms](#Comparing-CRDT-Algorithms)
-  * [Comparison of Yjs with other Implementations](#Comparing-Yjs-with-other-Implementations)
-* [License and Author](#License-and-Author)
-
-
-## Overview
-
-This repository contains a collection of shared types that can be observed for changes and manipulated concurrently. Network functionality and two-way-bindings are implemented in separate modules.
-
-### Bindings
-
-| Name                                                   | Cursors | Binding |  Demo |
-|---|:-:|---|---|
-| [ProseMirror](https://prosemirror.net/) | ✔ | [y-prosemirror](http://github.com/y-js/y-prosemirror) | [link](https://yjs.website/tutorial-prosemirror.html) |
-| [Quill](https://quilljs.com/) |  | [y-quill](http://github.com/y-js/y-quill) | [link](https://yjs.website/tutorial-quill.html) |
-| [CodeMirror](https://codemirror.net/) | ✔ | [y-codemirror](http://github.com/y-js/y-codemirror) | [link](https://yjs.website/tutorial-codemirror.html) |
-| [Ace](https://ace.c9.io/) | | [y-ace](http://github.com/y-js/y-ace) | [link]() |
-| [Monaco](https://microsoft.github.io/monaco-editor/) | | [y-monaco](http://github.com/y-js/y-monaco) | [link]() |
-
-
-### Providers
-
-Setting up the communication between clients, managing awareness information, and storing shared data for offline usage is quite a hassle. **Providers** manage all that for you and are a good off-the-shelf solution.
-
-<dl>
-  <dt><a href="http://github.com/y-js/y-websocket">y-websocket</a></dt>
-  <dd>A module that contains a simple websocket backend and a websocket client that connects to that backend. The backend can be extended to persist updates in a leveldb database.</dd>
-  <dt><a href="http://github.com/y-js/y-mesh">y-mesh</a></dt>
-  <dd>[WIP] Creates a connected graph of webrtc connections with a high <a href="https://en.wikipedia.org/wiki/Strength_of_a_graph">strength</a>. It requires a signalling server that connects a client to the first peer. But after that the network manages itself. It is well suited for large and small networks.</dd>
-  <dt><a href="http://github.com/y-js/y-dat">y-dat</a></dt>
-  <dd>[WIP] Writes updates effinciently in the dat network using <a href="https://github.com/kappa-db/multifeed">multifeed</a>. Each client has an append-only log of CRDT local updates (hypercore). Multifeed manages and sync hypercores and y-dat listens to changes and applies them to the Yjs document.</dd>
-</dl>
-
-## Getting Started
-
-Install Yjs and a provider with your favorite package manager. In this section we are going to bind a YText to a DOM textarea.
-
-```sh
-npm i yjs@13.0.0-80 y-websocket@1.0.0-1 y-textarea
-```
-
-**Start the y-websocket server**
-
-```sh
-PORT=1234 node ./node_modules/y-websocket/bin/server.js
-```
-
-**Textarea Binding Example**
-
-```js
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'y-websocket'
-import { TextareaBinding } from 'y-textarea'
-
-const provider = new WebsocketProvider('http://localhost:1234')
-const sharedDocument = provider.get('my-favourites')
-
-// Define a shared type on the document.
-const ytext = sharedDocument.getText('my resume')
-
-// bind to a textarea
-const binding = new TextareaBinding(ytext, document.querySelector('textarea'))
-```
-
-Now you understand how types are defined on a shared document. Next you can jump to the [demo repository](https://github.com/y-js/yjs-demos) or continue reading the API docs.
-
-## API
-
-```js
-import * as Y from 'yjs'
-```
-
-<details>
-  <summary><b>Y.Array</b></summary>
-  <br>
-  <p>
-    A shareable Array-like type that supports efficient insert/delete of elements at any position. Internally it uses a linked list of Arrays that is split when necessary.
-  </p>
-  <pre>const yarray = new Y.Array()</pre>
-  <dl>
-    <b><code>insert(index:number, content:Array&lt;object|string|number|Y.Type&gt;)</code></b>
-    <dd>
-      Insert content at <var>index</var>. Note that content is an array of elements. I.e. <code>array.insert(0, [1]</code> splices the list and inserts 1 at position 0.
-    </dd>
-    <b><code>push(Array&lt;Object|Array|string|number|Y.Type&gt;)</code></b>
-    <dd></dd>
-    <b><code>delete(index:number, length:number)</code></b>
-    <dd></dd>
-    <b><code>get(index:number)</code></b>
-    <dd></dd>
-    <b><code>length:number</code></b>
-    <dd></dd>
-    <b><code>map(function(T, number, YArray):M):Array&lt;M&gt;</code></b>
-    <dd></dd>
-    <b><code>toArray():Array&lt;Object|Array|string|number|Y.Type&gt;</code></b>
-    <dd>Copies the content of this YArray to a new Array.</dd>
-    <b><code>toJSON():Array&lt;Object|Array|string|number&gt;</code></b>
-    <dd>Copies the content of this YArray to a new Array. It transforms all child types to JSON using their <code>toJSON</code> method.</dd>
-    <b><code>[Symbol.Iterator]</code></b>
-    <dd>
-      Returns an YArray Iterator that contains the values for each index in the array.
-      <pre>for (let value of yarray) { .. }</pre>
-    </dd>
-    <b><code>observe(function(YArrayEvent, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns.
-    </dd>
-    <b><code>unobserve(function(YArrayEvent, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observe</code> event listener from this type.
-    </dd>
-    <b><code>observeDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type or any of its children is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns. The event listener receives all Events created by itself or any of its children.
-    </dd>
-    <b><code>unobserveDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observeDeep</code> event listener from this type.
-    </dd>
-  </dl>
-</details>
-<details>
-  <summary><b>Y.Map</b></summary>
-  <br>
-  <p>
-    A shareable Map type.
-  </p>
-  <pre><code>const ymap = new Y.Map()</code></pre>
-  <dl>
-    <b><code>get(key:string):object|string|number|Y.Type</code></b>
-    <dd></dd>
-    <b><code>set(key:string, value:object|string|number|Y.Type)</code></b>
-    <dd></dd>
-    <b><code>delete(key:string)</code></b>
-    <dd></dd>
-    <b><code>has(key:string):boolean</code></b>
-    <dd></dd>
-    <b><code>get(index:number)</code></b>
-    <dd></dd>
-    <b><code>toJSON():Object&lt;string, Object|Array|string|number&gt;</code></b>
-    <dd>Copies the <code>[key,value]</code> pairs of this YMap to a new Object. It transforms all child types to JSON using their <code>toJSON</code> method.</dd>
-    <b><code>[Symbol.Iterator]</code></b>
-    <dd>
-      Returns an Iterator of <code>[key, value]</code> pairs.
-      <pre>for (let [key, value] of ymap) { .. }</pre>
-    </dd>
-    <b><code>entries()</code></b>
-    <dd>
-      Returns an Iterator of <code>[key, value]</code> pairs.
-    </dd>
-    <b><code>values()</code></b>
-    <dd>
-      Returns an Iterator of all values.
-    </dd>
-    <b><code>keys()</code></b>
-    <dd>
-      Returns an Iterator of all keys.
-    </dd>
-    <b><code>observe(function(YMapEvent, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns.
-    </dd>
-    <b><code>unobserve(function(YMapEvent, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observe</code> event listener from this type.
-    </dd>
-    <b><code>observeDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type or any of its children is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns. The event listener receives all Events created by itself or any of its children.
-    </dd>
-    <b><code>unobserveDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observeDeep</code> event listener from this type.
-    </dd>
-  </dl>
-</details>
-
-<details>
-  <summary><b>Y.Text</b></summary>
-  <br>
-  <p>
-    A shareable type that is optimized for shared editing on text. It allows to assign properties to ranges in the text. This makes it possible to implement rich-text bindings to this type.
-  </p>
-  <p>
-    This type can also be transformed to the <a href="https://quilljs.com/docs/delta">delta format</a>. Similarly the YTextEvents compute changes as deltas.
-  </p>
-  <pre>const ytext = new Y.Text()</pre>
-  <dl>
-    <b><code>insert(index:number, content:string, [formattingAttributes:Object&lt;string,string&gt;])</code></b>
-    <dd>
-      Insert a string at <var>index</var> and assign formatting attributes to it.
-      <pre>ytext.insert(0, 'bold text', { bold: true })</pre>
-    </dd>
-    <b><code>delete(index:number, length:number)</code></b>
-    <dd></dd>
-    <b><code>format(index:number, length:number, formattingAttributes:Object&lt;string,string&gt;)</code></b>
-    <dd>Assign formatting attributes to a range in the text</dd>
-    <b><code>applyDelta(delta)</code></b>
-    <dd>See <a href="https://quilljs.com/docs/delta/">Quill Delta</a></dd>
-    <b><code>length:number</code></b>
-    <dd></dd>
-    <b><code>toString():string</code></b>
-    <dd>Transforms this type, without formatting options, into a string.</dd>
-    <b><code>toJSON():string</code></b>
-    <dd>See <code>toString</code></dd>
-    <b><code>toDelta():Delta</code></b>
-    <dd>Transforms this type to a <a href="https://quilljs.com/docs/delta/">Quill Delta</a></dd>
-    <b><code>observe(function(YTextEvent, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns.
-    </dd>
-    <b><code>unobserve(function(YTextEvent, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observe</code> event listener from this type.
-    </dd>
-    <b><code>observeDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type or any of its children is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns. The event listener receives all Events created by itself or any of its children.
-    </dd>
-    <b><code>unobserveDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observeDeep</code> event listener from this type.
-    </dd>
-  </dl>
-</details>
-
-<details>
-  <summary><b>YXmlFragment</b></summary>
-  <br>
-  <p>
-    A container that holds an Array of Y.XmlElements.
-  </p>
-  <pre><code>const yxml = new Y.XmlFragment()</code></pre>
-  <dl>
-    <b><code>insert(index:number, content:Array&lt;Y.XmlElement|Y.XmlText&gt;)</code></b>
-    <dd></dd>
-    <b><code>delete(index:number, length:number)</code></b>
-    <dd></dd>
-    <b><code>get(index:number)</code></b>
-    <dd></dd>
-    <b><code>length:number</code></b>
-    <dd></dd>
-    <b><code>toArray():Array&lt;Y.XmlElement|Y.XmlText&gt;</code></b>
-    <dd>Copies the children to a new Array.</dd>
-    <b><code>toDOM():DocumentFragment</code></b>
-    <dd>Transforms this type and all children to new DOM elements.</dd>
-    <b><code>toString():string</code></b>
-    <dd>Get the XML serialization of all descendants.</dd>
-    <b><code>toJSON():string</code></b>
-    <dd>See <code>toString</code>.</dd>
-    <b><code>observe(function(YXmlEvent, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns.
-    </dd>
-    <b><code>unobserve(function(YXmlEvent, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observe</code> event listener from this type.
-    </dd>
-    <b><code>observeDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type or any of its children is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns. The event listener receives all Events created by itself or any of its children.
-    </dd>
-    <b><code>unobserveDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observeDeep</code> event listener from this type.
-    </dd>
-  </dl>
-</details>
-
-<details>
-  <summary><b>Y.XmlElement</b></summary>
-  <br>
-  <p>
-    A shareable type that represents an XML Element. It has a <code>nodeName</code>, attributes, and a list of children. But it makes no effort to validate its content and be actually XML compliant.
-  </p>
-  <pre><code>const yxml = new Y.XmlElement()</code></pre>
-  <dl>
-    <b><code>insert(index:number, content:Array&lt;Y.XmlElement|Y.XmlText&gt;)</code></b>
-    <dd></dd>
-    <b><code>delete(index:number, length:number)</code></b>
-    <dd></dd>
-    <b><code>get(index:number)</code></b>
-    <dd></dd>
-    <b><code>length:number</code></b>
-    <dd></dd>
-    <b><code>setAttribute(attributeName:string, attributeValue:string)</code></b>
-    <dd></dd>
-    <b><code>removeAttribute(attributeName:string)</code></b>
-    <dd></dd>
-    <b><code>getAttribute(attributeName:string):string</code></b>
-    <dd></dd>
-    <b><code>getAttributes(attributeName:string):Object&lt;string,string&gt;</code></b>
-    <dd></dd>
-    <b><code>toArray():Array&lt;Y.XmlElement|Y.XmlText&gt;</code></b>
-    <dd>Copies the children to a new Array.</dd>
-    <b><code>toDOM():Element</code></b>
-    <dd>Transforms this type and all children to a new DOM element.</dd>
-    <b><code>toString():string</code></b>
-    <dd>Get the XML serialization of all descendants.</dd>
-    <b><code>toJSON():string</code></b>
-    <dd>See <code>toString</code>.</dd>
-    <b><code>observe(function(YXmlEvent, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns.
-    </dd>
-    <b><code>unobserve(function(YXmlEvent, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observe</code> event listener from this type.
-    </dd>
-    <b><code>observeDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Adds an event listener to this type that will be called synchronously every time this type or any of its children is modified. In the case this type is modified in the event listener, the event listener will be called again after the current event listener returns. The event listener receives all Events created by itself or any of its children.
-    </dd>
-    <b><code>unobserveDeep(function(Array&lt;YEvent&gt;, Transaction):void)</code></b>
-    <dd>
-      Removes an <code>observeDeep</code> event listener from this type.
-    </dd>
-  </dl>
-</details>
-
-### Custom Types
-
-## Bindings
-
-## Transaction
-
-## Binary Encoding Protocols
-
-### Sync Protocol
-
-Sync steps
-
-### Awareness Protocol
-
-### Auth Protocol
-
-## Offline Editing
-
-It is trivial with Yjs to persist the local state to indexeddb, so it is always available when working offline. But there are two non-trivial questions that need to answered when implementing a professional offline editing app:
-
-1. How does a client sync down all rooms that were modified while offline?
-2. How does a client sync up all rooms that were modified while offline?
-
-Assuming 5000 documents are stored on each client for offline usage. How do we sync up/down each of those documents after a client comes online? It would be inefficient to sync each of those rooms separately. The only provider that currently supports syncing many rooms efficiently is Ydb, because its database layer is optimized to sync many rooms with each client.
-
-If you do not care about 1. and 2. you can use `/persistences/indexeddb.js` to mirror the local state to indexeddb.
-
-## Working with Yjs
-
-### Typescript Declarations
-
-Until [this](https://github.com/Microsoft/TypeScript/issues/7546) is fixed, the only way to get type declarations is by adding Yjs to the list of checked files:
-
-```json
-{
-  "compilerOptions": {
-    "allowJs": true,
-    "checkJs": true,
-  },
-  "maxNodeModuleJsDepth": 5
-}
-```
-
-## Yjs CRDT Algorithm
-
-## License and Author
-
-Yjs and all related projects are [**MIT licensed**](./LICENSE).
-
-Yjs is based on the research I did as a student at the [RWTH i5](http://dbis.rwth-aachen.de/). Now I am working on Yjs in my spare time.
-
-Support me on [Patreon](https://www.patreon.com/dmonad) to fund this project or hire [me](https://github.com/dmonad) for professional support.

bower.json

@@ -0,0 +1,33 @@
+{
+  "name": "yjs",
+  "version": "0.5.3",
+  "homepage": "https://github.com/DadaMonad/yjs",
+  "authors": [
+    "Kevin Jahns <kevin.jahns@rwth-aachen.de>"
+  ],
+  "description": "A Framework that enables Real-Time collaboration on arbitrary data structures.",
+  "main": [
+    "./y.js",
+    "./y-object.html",
+    "./build/node/y.js"
+  ],
+  "keywords": [
+    "OT",
+    "collaboration",
+    "synchronization",
+    "ShareJS",
+    "Coweb",
+    "concurrency"
+  ],
+  "license": "MIT",
+  "ignore": [
+    "node_modules",
+    "bower_components",
+    "test",
+    "extras",
+    "test"
+  ],
+  "devDependencies": {
+    "y-test" : "y-test#~0.4.0"
+  }
+}

build/README.md

@@ -0,0 +1,11 @@
+
+# Directories
+
+### build/browser
+You find the browserified (not minified) version of yjs here. This is nice for debugging, since it also includes sourcemaps. For production, however, you should use the version that you find in the main directory.
+
+### build/node
+Yjs for nodejs is located here. You can only use the submodules, or require 'y' in your node project. Also works with browserify.
+
+### build/test
+Start build/test/index.html' in your browser, to perform testing Yjs.

build/browser/y-object.html

@@ -0,0 +1,7 @@
+
+<polymer-element name="y-object" hidden attributes="val connector y">
+</polymer-element>
+<polymer-element name="y-property" hidden attributes="val name y">
+</polymer-element>
+
+<script src="./y-object.js"></script>

build/node/ConnectorAdapter.js

@@ -0,0 +1,71 @@
+var ConnectorClass, adaptConnector;
+
+ConnectorClass = require("./ConnectorClass");
+
+adaptConnector = function(connector, engine, HB, execution_listener) {
+  var applyHB, encode_state_vector, f, getHB, getStateVector, name, parse_state_vector, send_;
+  for (name in ConnectorClass) {
+    f = ConnectorClass[name];
+    connector[name] = f;
+  }
+  encode_state_vector = function(v) {
+    var results, value;
+    results = [];
+    for (name in v) {
+      value = v[name];
+      results.push({
+        user: name,
+        state: value
+      });
+    }
+    return results;
+  };
+  parse_state_vector = function(v) {
+    var i, len, s, state_vector;
+    state_vector = {};
+    for (i = 0, len = v.length; i < len; i++) {
+      s = v[i];
+      state_vector[s.user] = s.state;
+    }
+    return state_vector;
+  };
+  getStateVector = function() {
+    return encode_state_vector(HB.getOperationCounter());
+  };
+  getHB = function(v) {
+    var hb, json, state_vector;
+    state_vector = parse_state_vector(v);
+    hb = HB._encode(state_vector);
+    json = {
+      hb: hb,
+      state_vector: encode_state_vector(HB.getOperationCounter())
+    };
+    return json;
+  };
+  applyHB = function(hb, fromHB) {
+    return engine.applyOp(hb, fromHB);
+  };
+  connector.getStateVector = getStateVector;
+  connector.getHB = getHB;
+  connector.applyHB = applyHB;
+  if (connector.receive_handlers == null) {
+    connector.receive_handlers = [];
+  }
+  connector.receive_handlers.push(function(sender, op) {
+    if (op.uid.creator !== HB.getUserId()) {
+      return engine.applyOp(op);
+    }
+  });
+  connector.setIsBoundToY();
+  send_ = function(o) {
+    if ((o.uid.creator === HB.getUserId()) && (typeof o.uid.op_number !== "string") && (HB.getUserId() !== "_temp")) {
+      return connector.broadcast(o);
+    }
+  };
+  if (connector.invokeSync != null) {
+    HB.setInvokeSyncHandler(connector.invokeSync);
+  }
+  return execution_listener.push(send_);
+};
+
+module.exports = adaptConnector;

build/node/ConnectorClass.js

@@ -0,0 +1,415 @@
+module.exports = {
+  init: function(options) {
+    var req;
+    req = (function(_this) {
+      return function(name, choices) {
+        if (options[name] != null) {
+          if ((choices == null) || choices.some(function(c) {
+            return c === options[name];
+          })) {
+            return _this[name] = options[name];
+          } else {
+            throw new Error("You can set the '" + name + "' option to one of the following choices: " + JSON.encode(choices));
+          }
+        } else {
+          throw new Error("You must specify " + name + ", when initializing the Connector!");
+        }
+      };
+    })(this);
+    req("syncMethod", ["syncAll", "master-slave"]);
+    req("role", ["master", "slave"]);
+    req("user_id");
+    if (typeof this.on_user_id_set === "function") {
+      this.on_user_id_set(this.user_id);
+    }
+    if (options.perform_send_again != null) {
+      this.perform_send_again = options.perform_send_again;
+    } else {
+      this.perform_send_again = true;
+    }
+    if (this.role === "master") {
+      this.syncMethod = "syncAll";
+    }
+    this.is_synced = false;
+    this.connections = {};
+    if (this.receive_handlers == null) {
+      this.receive_handlers = [];
+    }
+    this.connections = {};
+    this.current_sync_target = null;
+    this.sent_hb_to_all_users = false;
+    return this.is_initialized = true;
+  },
+  onUserEvent: function(f) {
+    if (this.connections_listeners == null) {
+      this.connections_listeners = [];
+    }
+    return this.connections_listeners.push(f);
+  },
+  isRoleMaster: function() {
+    return this.role === "master";
+  },
+  isRoleSlave: function() {
+    return this.role === "slave";
+  },
+  findNewSyncTarget: function() {
+    var c, ref, user;
+    this.current_sync_target = null;
+    if (this.syncMethod === "syncAll") {
+      ref = this.connections;
+      for (user in ref) {
+        c = ref[user];
+        if (!c.is_synced) {
+          this.performSync(user);
+          break;
+        }
+      }
+    }
+    if (this.current_sync_target == null) {
+      this.setStateSynced();
+    }
+    return null;
+  },
+  userLeft: function(user) {
+    var f, i, len, ref, results;
+    delete this.connections[user];
+    this.findNewSyncTarget();
+    if (this.connections_listeners != null) {
+      ref = this.connections_listeners;
+      results = [];
+      for (i = 0, len = ref.length; i < len; i++) {
+        f = ref[i];
+        results.push(f({
+          action: "userLeft",
+          user: user
+        }));
+      }
+      return results;
+    }
+  },
+  userJoined: function(user, role) {
+    var base, f, i, len, ref, results;
+    if (role == null) {
+      throw new Error("Internal: You must specify the role of the joined user! E.g. userJoined('uid:3939','slave')");
+    }
+    if ((base = this.connections)[user] == null) {
+      base[user] = {};
+    }
+    this.connections[user].is_synced = false;
+    if ((!this.is_synced) || this.syncMethod === "syncAll") {
+      if (this.syncMethod === "syncAll") {
+        this.performSync(user);
+      } else if (role === "master") {
+        this.performSyncWithMaster(user);
+      }
+    }
+    if (this.connections_listeners != null) {
+      ref = this.connections_listeners;
+      results = [];
+      for (i = 0, len = ref.length; i < len; i++) {
+        f = ref[i];
+        results.push(f({
+          action: "userJoined",
+          user: user,
+          role: role
+        }));
+      }
+      return results;
+    }
+  },
+  whenSynced: function(args) {
+    if (args.constructor === Function) {
+      args = [args];
+    }
+    if (this.is_synced) {
+      return args[0].apply(this, args.slice(1));
+    } else {
+      if (this.compute_when_synced == null) {
+        this.compute_when_synced = [];
+      }
+      return this.compute_when_synced.push(args);
+    }
+  },
+  onReceive: function(f) {
+    return this.receive_handlers.push(f);
+  },
+
+  /*
+   * Broadcast a message to all connected peers.
+   * @param message {Object} The message to broadcast.
+  #
+  broadcast: (message)->
+    throw new Error "You must implement broadcast!"
+  
+  #
+   * Send a message to a peer, or set of peers
+  #
+  send: (peer_s, message)->
+    throw new Error "You must implement send!"
+   */
+  performSync: function(user) {
+    var _hb, hb, i, len, o;
+    if (this.current_sync_target == null) {
+      this.current_sync_target = user;
+      this.send(user, {
+        sync_step: "getHB",
+        send_again: "true",
+        data: this.getStateVector()
+      });
+      if (!this.sent_hb_to_all_users) {
+        this.sent_hb_to_all_users = true;
+        hb = this.getHB([]).hb;
+        _hb = [];
+        for (i = 0, len = hb.length; i < len; i++) {
+          o = hb[i];
+          _hb.push(o);
+          if (_hb.length > 10) {
+            this.broadcast({
+              sync_step: "applyHB_",
+              data: _hb
+            });
+            _hb = [];
+          }
+        }
+        return this.broadcast({
+          sync_step: "applyHB",
+          data: _hb
+        });
+      }
+    }
+  },
+  performSyncWithMaster: function(user) {
+    var _hb, hb, i, len, o;
+    this.current_sync_target = user;
+    this.send(user, {
+      sync_step: "getHB",
+      send_again: "true",
+      data: this.getStateVector()
+    });
+    hb = this.getHB([]).hb;
+    _hb = [];
+    for (i = 0, len = hb.length; i < len; i++) {
+      o = hb[i];
+      _hb.push(o);
+      if (_hb.length > 10) {
+        this.broadcast({
+          sync_step: "applyHB_",
+          data: _hb
+        });
+        _hb = [];
+      }
+    }
+    return this.broadcast({
+      sync_step: "applyHB",
+      data: _hb
+    });
+  },
+  setStateSynced: function() {
+    var args, el, f, i, len, ref;
+    if (!this.is_synced) {
+      this.is_synced = true;
+      if (this.compute_when_synced != null) {
+        ref = this.compute_when_synced;
+        for (i = 0, len = ref.length; i < len; i++) {
+          el = ref[i];
+          f = el[0];
+          args = el.slice(1);
+          f.apply(args);
+        }
+        delete this.compute_when_synced;
+      }
+      return null;
+    }
+  },
+  whenReceivedStateVector: function(f) {
+    if (this.when_received_state_vector_listeners == null) {
+      this.when_received_state_vector_listeners = [];
+    }
+    return this.when_received_state_vector_listeners.push(f);
+  },
+  receiveMessage: function(sender, res) {
+    var _hb, data, f, hb, i, j, k, len, len1, len2, o, ref, ref1, results, sendApplyHB, send_again;
+    if (res.sync_step == null) {
+      ref = this.receive_handlers;
+      results = [];
+      for (i = 0, len = ref.length; i < len; i++) {
+        f = ref[i];
+        results.push(f(sender, res));
+      }
+      return results;
+    } else {
+      if (sender === this.user_id) {
+        return;
+      }
+      if (res.sync_step === "getHB") {
+        if (this.when_received_state_vector_listeners != null) {
+          ref1 = this.when_received_state_vector_listeners;
+          for (j = 0, len1 = ref1.length; j < len1; j++) {
+            f = ref1[j];
+            f.call(this, res.data);
+          }
+        }
+        delete this.when_received_state_vector_listeners;
+        data = this.getHB(res.data);
+        hb = data.hb;
+        _hb = [];
+        if (this.is_synced) {
+          sendApplyHB = (function(_this) {
+            return function(m) {
+              return _this.send(sender, m);
+            };
+          })(this);
+        } else {
+          sendApplyHB = (function(_this) {
+            return function(m) {
+              return _this.broadcast(m);
+            };
+          })(this);
+        }
+        for (k = 0, len2 = hb.length; k < len2; k++) {
+          o = hb[k];
+          _hb.push(o);
+          if (_hb.length > 10) {
+            sendApplyHB({
+              sync_step: "applyHB_",
+              data: _hb
+            });
+            _hb = [];
+          }
+        }
+        sendApplyHB({
+          sync_step: "applyHB",
+          data: _hb
+        });
+        if ((res.send_again != null) && this.perform_send_again) {
+          send_again = (function(_this) {
+            return function(sv) {
+              return function() {
+                var l, len3;
+                hb = _this.getHB(sv).hb;
+                for (l = 0, len3 = hb.length; l < len3; l++) {
+                  o = hb[l];
+                  _hb.push(o);
+                  if (_hb.length > 10) {
+                    _this.send(sender, {
+                      sync_step: "applyHB_",
+                      data: _hb
+                    });
+                    _hb = [];
+                  }
+                }
+                return _this.send(sender, {
+                  sync_step: "applyHB",
+                  data: _hb,
+                  sent_again: "true"
+                });
+              };
+            };
+          })(this)(data.state_vector);
+          return setTimeout(send_again, 3000);
+        }
+      } else if (res.sync_step === "applyHB") {
+        this.applyHB(res.data, sender === this.current_sync_target);
+        if ((this.syncMethod === "syncAll" || (res.sent_again != null)) && (!this.is_synced) && ((this.current_sync_target === sender) || (this.current_sync_target == null))) {
+          this.connections[sender].is_synced = true;
+          return this.findNewSyncTarget();
+        }
+      } else if (res.sync_step === "applyHB_") {
+        return this.applyHB(res.data, sender === this.current_sync_target);
+      }
+    }
+  },
+  parseMessageFromXml: function(m) {
+    var parse_array, parse_object;
+    parse_array = function(node) {
+      var i, len, n, ref, results;
+      ref = node.children;
+      results = [];
+      for (i = 0, len = ref.length; i < len; i++) {
+        n = ref[i];
+        if (n.getAttribute("isArray") === "true") {
+          results.push(parse_array(n));
+        } else {
+          results.push(parse_object(n));
+        }
+      }
+      return results;
+    };
+    parse_object = function(node) {
+      var i, int, json, len, n, name, ref, ref1, value;
+      json = {};
+      ref = node.attrs;
+      for (name in ref) {
+        value = ref[name];
+        int = parseInt(value);
+        if (isNaN(int) || ("" + int) !== value) {
+          json[name] = value;
+        } else {
+          json[name] = int;
+        }
+      }
+      ref1 = node.children;
+      for (i = 0, len = ref1.length; i < len; i++) {
+        n = ref1[i];
+        name = n.name;
+        if (n.getAttribute("isArray") === "true") {
+          json[name] = parse_array(n);
+        } else {
+          json[name] = parse_object(n);
+        }
+      }
+      return json;
+    };
+    return parse_object(m);
+  },
+  encodeMessageToXml: function(m, json) {
+    var encode_array, encode_object;
+    encode_object = function(m, json) {
+      var name, value;
+      for (name in json) {
+        value = json[name];
+        if (value == null) {
+
+        } else if (value.constructor === Object) {
+          encode_object(m.c(name), value);
+        } else if (value.constructor === Array) {
+          encode_array(m.c(name), value);
+        } else {
+          m.setAttribute(name, value);
+        }
+      }
+      return m;
+    };
+    encode_array = function(m, array) {
+      var e, i, len;
+      m.setAttribute("isArray", "true");
+      for (i = 0, len = array.length; i < len; i++) {
+        e = array[i];
+        if (e.constructor === Object) {
+          encode_object(m.c("array-element"), e);
+        } else {
+          encode_array(m.c("array-element"), e);
+        }
+      }
+      return m;
+    };
+    if (json.constructor === Object) {
+      return encode_object(m.c("y", {
+        xmlns: "http://y.ninja/connector-stanza"
+      }), json);
+    } else if (json.constructor === Array) {
+      return encode_array(m.c("y", {
+        xmlns: "http://y.ninja/connector-stanza"
+      }), json);
+    } else {
+      throw new Error("I can't encode this json!");
+    }
+  },
+  setIsBoundToY: function() {
+    if (typeof this.on_bound_to_y === "function") {
+      this.on_bound_to_y();
+    }
+    delete this.when_bound_to_y;
+    return this.is_bound_to_y = true;
+  }
+};

build/node/Engine.js

@@ -0,0 +1,120 @@
+var Engine;
+
+if (typeof window !== "undefined" && window !== null) {
+  window.unprocessed_counter = 0;
+}
+
+if (typeof window !== "undefined" && window !== null) {
+  window.unprocessed_exec_counter = 0;
+}
+
+if (typeof window !== "undefined" && window !== null) {
+  window.unprocessed_types = [];
+}
+
+Engine = (function() {
+  function Engine(HB, types) {
+    this.HB = HB;
+    this.types = types;
+    this.unprocessed_ops = [];
+  }
+
+  Engine.prototype.parseOperation = function(json) {
+    var type;
+    type = this.types[json.type];
+    if ((type != null ? type.parse : void 0) != null) {
+      return type.parse(json);
+    } else {
+      throw new Error("You forgot to specify a parser for type " + json.type + ". The message is " + (JSON.stringify(json)) + ".");
+    }
+  };
+
+
+  /*
+  applyOpsBundle: (ops_json)->
+    ops = []
+    for o in ops_json
+      ops.push @parseOperation o
+    for o in ops
+      if not o.execute()
+        @unprocessed_ops.push o
+    @tryUnprocessed()
+   */
+
+  Engine.prototype.applyOpsCheckDouble = function(ops_json) {
+    var i, len, o, results;
+    results = [];
+    for (i = 0, len = ops_json.length; i < len; i++) {
+      o = ops_json[i];
+      if (this.HB.getOperation(o.uid) == null) {
+        results.push(this.applyOp(o));
+      } else {
+        results.push(void 0);
+      }
+    }
+    return results;
+  };
+
+  Engine.prototype.applyOps = function(ops_json) {
+    return this.applyOp(ops_json);
+  };
+
+  Engine.prototype.applyOp = function(op_json_array, fromHB) {
+    var i, len, o, op_json;
+    if (fromHB == null) {
+      fromHB = false;
+    }
+    if (op_json_array.constructor !== Array) {
+      op_json_array = [op_json_array];
+    }
+    for (i = 0, len = op_json_array.length; i < len; i++) {
+      op_json = op_json_array[i];
+      if (fromHB) {
+        op_json.fromHB = "true";
+      }
+      o = this.parseOperation(op_json);
+      o.parsed_from_json = op_json;
+      if (op_json.fromHB != null) {
+        o.fromHB = op_json.fromHB;
+      }
+      if (this.HB.getOperation(o) != null) {
+
+      } else if (((!this.HB.isExpectedOperation(o)) && (o.fromHB == null)) || (!o.execute())) {
+        this.unprocessed_ops.push(o);
+        if (typeof window !== "undefined" && window !== null) {
+          window.unprocessed_types.push(o.type);
+        }
+      }
+    }
+    return this.tryUnprocessed();
+  };
+
+  Engine.prototype.tryUnprocessed = function() {
+    var i, len, old_length, op, ref, unprocessed;
+    while (true) {
+      old_length = this.unprocessed_ops.length;
+      unprocessed = [];
+      ref = this.unprocessed_ops;
+      for (i = 0, len = ref.length; i < len; i++) {
+        op = ref[i];
+        if (this.HB.getOperation(op) != null) {
+
+        } else if ((!this.HB.isExpectedOperation(op) && (op.fromHB == null)) || (!op.execute())) {
+          unprocessed.push(op);
+        }
+      }
+      this.unprocessed_ops = unprocessed;
+      if (this.unprocessed_ops.length === old_length) {
+        break;
+      }
+    }
+    if (this.unprocessed_ops.length !== 0) {
+      return this.HB.invokeSync();
+    }
+  };
+
+  return Engine;
+
+})();
+
+module.exports = Engine;

build/node/HistoryBuffer.js

@@ -0,0 +1,255 @@
+var HistoryBuffer,
+  bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
+
+HistoryBuffer = (function() {
+  function HistoryBuffer(user_id1) {
+    this.user_id = user_id1;
+    this.emptyGarbage = bind(this.emptyGarbage, this);
+    this.operation_counter = {};
+    this.buffer = {};
+    this.change_listeners = [];
+    this.garbage = [];
+    this.trash = [];
+    this.performGarbageCollection = true;
+    this.garbageCollectTimeout = 30000;
+    this.reserved_identifier_counter = 0;
+    setTimeout(this.emptyGarbage, this.garbageCollectTimeout);
+  }
+
+  HistoryBuffer.prototype.setUserId = function(user_id1, state_vector) {
+    var base, buff, counter_diff, name, o, o_name, ref;
+    this.user_id = user_id1;
+    if ((base = this.buffer)[name = this.user_id] == null) {
+      base[name] = [];
+    }
+    buff = this.buffer[this.user_id];
+    counter_diff = state_vector[this.user_id] || 0;
+    if (this.buffer._temp != null) {
+      ref = this.buffer._temp;
+      for (o_name in ref) {
+        o = ref[o_name];
+        o.uid.creator = this.user_id;
+        o.uid.op_number += counter_diff;
+        buff[o.uid.op_number] = o;
+      }
+    }
+    this.operation_counter[this.user_id] = (this.operation_counter._temp || 0) + counter_diff;
+    delete this.operation_counter._temp;
+    return delete this.buffer._temp;
+  };
+
+  HistoryBuffer.prototype.emptyGarbage = function() {
+    var i, len, o, ref;
+    ref = this.garbage;
+    for (i = 0, len = ref.length; i < len; i++) {
+      o = ref[i];
+      if (typeof o.cleanup === "function") {
+        o.cleanup();
+      }
+    }
+    this.garbage = this.trash;
+    this.trash = [];
+    if (this.garbageCollectTimeout !== -1) {
+      this.garbageCollectTimeoutId = setTimeout(this.emptyGarbage, this.garbageCollectTimeout);
+    }
+    return void 0;
+  };
+
+  HistoryBuffer.prototype.getUserId = function() {
+    return this.user_id;
+  };
+
+  HistoryBuffer.prototype.addToGarbageCollector = function() {
+    var i, len, o, results;
+    if (this.performGarbageCollection) {
+      results = [];
+      for (i = 0, len = arguments.length; i < len; i++) {
+        o = arguments[i];
+        if (o != null) {
+          results.push(this.garbage.push(o));
+        } else {
+          results.push(void 0);
+        }
+      }
+      return results;
+    }
+  };
+
+  HistoryBuffer.prototype.stopGarbageCollection = function() {
+    this.performGarbageCollection = false;
+    this.setManualGarbageCollect();
+    this.garbage = [];
+    return this.trash = [];
+  };
+
+  HistoryBuffer.prototype.setManualGarbageCollect = function() {
+    this.garbageCollectTimeout = -1;
+    clearTimeout(this.garbageCollectTimeoutId);
+    return this.garbageCollectTimeoutId = void 0;
+  };
+
+  HistoryBuffer.prototype.setGarbageCollectTimeout = function(garbageCollectTimeout) {
+    this.garbageCollectTimeout = garbageCollectTimeout;
+  };
+
+  HistoryBuffer.prototype.getReservedUniqueIdentifier = function() {
+    return {
+      creator: '_',
+      op_number: "_" + (this.reserved_identifier_counter++)
+    };
+  };
+
+  HistoryBuffer.prototype.getOperationCounter = function(user_id) {
+    var ctn, ref, res, user;
+    if (user_id == null) {
+      res = {};
+      ref = this.operation_counter;
+      for (user in ref) {
+        ctn = ref[user];
+        res[user] = ctn;
+      }
+      return res;
+    } else {
+      return this.operation_counter[user_id];
+    }
+  };
+
+  HistoryBuffer.prototype.isExpectedOperation = function(o) {
+    var base, name;
+    if ((base = this.operation_counter)[name = o.uid.creator] == null) {
+      base[name] = 0;
+    }
+    o.uid.op_number <= this.operation_counter[o.uid.creator];
+    return true;
+  };
+
+  HistoryBuffer.prototype._encode = function(state_vector) {
+    var json, o, o_json, o_next, o_number, o_prev, ref, u_name, unknown, user;
+    if (state_vector == null) {
+      state_vector = {};
+    }
+    json = [];
+    unknown = function(user, o_number) {
+      if ((user == null) || (o_number == null)) {
+        throw new Error("dah!");
+      }
+      return (state_vector[user] == null) || state_vector[user] <= o_number;
+    };
+    ref = this.buffer;
+    for (u_name in ref) {
+      user = ref[u_name];
+      if (u_name === "_") {
+        continue;
+      }
+      for (o_number in user) {
+        o = user[o_number];
+        if ((o.uid.noOperation == null) && unknown(u_name, o_number)) {
+          o_json = o._encode();
+          if (o.next_cl != null) {
+            o_next = o.next_cl;
+            while ((o_next.next_cl != null) && unknown(o_next.uid.creator, o_next.uid.op_number)) {
+              o_next = o_next.next_cl;
+            }
+            o_json.next = o_next.getUid();
+          } else if (o.prev_cl != null) {
+            o_prev = o.prev_cl;
+            while ((o_prev.prev_cl != null) && unknown(o_prev.uid.creator, o_prev.uid.op_number)) {
+              o_prev = o_prev.prev_cl;
+            }
+            o_json.prev = o_prev.getUid();
+          }
+          json.push(o_json);
+        }
+      }
+    }
+    return json;
+  };
+
+  HistoryBuffer.prototype.getNextOperationIdentifier = function(user_id) {
+    var uid;
+    if (user_id == null) {
+      user_id = this.user_id;
+    }
+    if (this.operation_counter[user_id] == null) {
+      this.operation_counter[user_id] = 0;
+    }
+    uid = {
+      'creator': user_id,
+      'op_number': this.operation_counter[user_id]
+    };
+    this.operation_counter[user_id]++;
+    return uid;
+  };
+
+  HistoryBuffer.prototype.getOperation = function(uid) {
+    var o, ref;
+    if (uid.uid != null) {
+      uid = uid.uid;
+    }
+    o = (ref = this.buffer[uid.creator]) != null ? ref[uid.op_number] : void 0;
+    if ((uid.sub != null) && (o != null)) {
+      return o.retrieveSub(uid.sub);
+    } else {
+      return o;
+    }
+  };
+
+  HistoryBuffer.prototype.addOperation = function(o) {
+    if (this.buffer[o.uid.creator] == null) {
+      this.buffer[o.uid.creator] = {};
+    }
+    if (this.buffer[o.uid.creator][o.uid.op_number] != null) {
+      throw new Error("You must not overwrite operations!");
+    }
+    if ((o.uid.op_number.constructor !== String) && (!this.isExpectedOperation(o)) && (o.fromHB == null)) {
+      throw new Error("this operation was not expected!");
+    }
+    this.addToCounter(o);
+    this.buffer[o.uid.creator][o.uid.op_number] = o;
+    return o;
+  };
+
+  HistoryBuffer.prototype.removeOperation = function(o) {
+    var ref;
+    return (ref = this.buffer[o.uid.creator]) != null ? delete ref[o.uid.op_number] : void 0;
+  };
+
+  HistoryBuffer.prototype.setInvokeSyncHandler = function(f) {
+    return this.invokeSync = f;
+  };
+
+  HistoryBuffer.prototype.invokeSync = function() {};
+
+  HistoryBuffer.prototype.renewStateVector = function(state_vector) {
+    var results, state, user;
+    results = [];
+    for (user in state_vector) {
+      state = state_vector[user];
+      if (((this.operation_counter[user] == null) || (this.operation_counter[user] < state_vector[user])) && (state_vector[user] != null)) {
+        results.push(this.operation_counter[user] = state_vector[user]);
+      } else {
+        results.push(void 0);
+      }
+    }
+    return results;
+  };
+
+  HistoryBuffer.prototype.addToCounter = function(o) {
+    var base, name;
+    if ((base = this.operation_counter)[name = o.uid.creator] == null) {
+      base[name] = 0;
+    }
+    if (o.uid.op_number === this.operation_counter[o.uid.creator]) {
+      this.operation_counter[o.uid.creator]++;
+    }
+    while (this.buffer[o.uid.creator][this.operation_counter[o.uid.creator]] != null) {
+      this.operation_counter[o.uid.creator]++;
+    }
+    return void 0;
+  };
+
+  return HistoryBuffer;
+
+})();
+
+module.exports = HistoryBuffer;

build/node/ObjectType.js

@@ -0,0 +1,91 @@
+var YObject;
+
+YObject = (function() {
+  function YObject(_object) {
+    var name, ref, val;
+    this._object = _object != null ? _object : {};
+    if (this._object.constructor === Object) {
+      ref = this._object;
+      for (name in ref) {
+        val = ref[name];
+        if (val.constructor === Object) {
+          this._object[name] = new YObject(val);
+        }
+      }
+    } else {
+      throw new Error("Y.Object accepts Json Objects only");
+    }
+  }
+
+  YObject.prototype._name = "Object";
+
+  YObject.prototype._getModel = function(types, ops) {
+    var n, o, ref;
+    if (this._model == null) {
+      this._model = new ops.MapManager(this).execute();
+      ref = this._object;
+      for (n in ref) {
+        o = ref[n];
+        this._model.val(n, o);
+      }
+    }
+    delete this._object;
+    return this._model;
+  };
+
+  YObject.prototype._setModel = function(_model) {
+    this._model = _model;
+    return delete this._object;
+  };
+
+  YObject.prototype.observe = function(f) {
+    this._model.observe(f);
+    return this;
+  };
+
+  YObject.prototype.unobserve = function(f) {
+    this._model.unobserve(f);
+    return this;
+  };
+
+  YObject.prototype.val = function(name, content) {
+    var n, ref, res, v;
+    if (this._model != null) {
+      return this._model.val.apply(this._model, arguments);
+    } else {
+      if (content != null) {
+        return this._object[name] = content;
+      } else if (name != null) {
+        return this._object[name];
+      } else {
+        res = {};
+        ref = this._object;
+        for (n in ref) {
+          v = ref[n];
+          res[n] = v;
+        }
+        return res;
+      }
+    }
+  };
+
+  YObject.prototype["delete"] = function(name) {
+    this._model["delete"](name);
+    return this;
+  };
+
+  return YObject;
+
+})();
+
+if (typeof window !== "undefined" && window !== null) {
+  if (window.Y != null) {
+    window.Y.Object = YObject;
+  } else {
+    throw new Error("You must first import Y!");
+  }
+}
+
+if (typeof module !== "undefined" && module !== null) {
+  module.exports = YObject;
+}

build/node/Operations/Basic.js

@@ -0,0 +1,670 @@
+var slice = [].slice,
+  extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
+  hasProp = {}.hasOwnProperty;
+
+module.exports = function() {
+  var execution_listener, ops;
+  ops = {};
+  execution_listener = [];
+  ops.Operation = (function() {
+    function Operation(custom_type, uid, content, content_operations) {
+      var name, op;
+      if (custom_type != null) {
+        this.custom_type = custom_type;
+      }
+      this.is_deleted = false;
+      this.garbage_collected = false;
+      this.event_listeners = [];
+      if (uid != null) {
+        this.uid = uid;
+      }
+      if (content === void 0) {
+
+      } else if ((content != null) && (content.creator != null)) {
+        this.saveOperation('content', content);
+      } else {
+        this.content = content;
+      }
+      if (content_operations != null) {
+        this.content_operations = {};
+        for (name in content_operations) {
+          op = content_operations[name];
+          this.saveOperation(name, op, 'content_operations');
+        }
+      }
+    }
+
+    Operation.prototype.type = "Operation";
+
+    Operation.prototype.getContent = function(name) {
+      var content, n, ref, ref1, v;
+      if (this.content != null) {
+        if (this.content.getCustomType != null) {
+          return this.content.getCustomType();
+        } else if (this.content.constructor === Object) {
+          if (name != null) {
+            if (this.content[name] != null) {
+              return this.content[name];
+            } else {
+              return this.content_operations[name].getCustomType();
+            }
+          } else {
+            content = {};
+            ref = this.content;
+            for (n in ref) {
+              v = ref[n];
+              content[n] = v;
+            }
+            if (this.content_operations != null) {
+              ref1 = this.content_operations;
+              for (n in ref1) {
+                v = ref1[n];
+                v = v.getCustomType();
+                content[n] = v;
+              }
+            }
+            return content;
+          }
+        } else {
+          return this.content;
+        }
+      } else {
+        return this.content;
+      }
+    };
+
+    Operation.prototype.retrieveSub = function() {
+      throw new Error("sub properties are not enable on this operation type!");
+    };
+
+    Operation.prototype.observe = function(f) {
+      return this.event_listeners.push(f);
+    };
+
+    Operation.prototype.unobserve = function(f) {
+      return this.event_listeners = this.event_listeners.filter(function(g) {
+        return f !== g;
+      });
+    };
+
+    Operation.prototype.deleteAllObservers = function() {
+      return this.event_listeners = [];
+    };
+
+    Operation.prototype["delete"] = function() {
+      (new ops.Delete(void 0, this)).execute();
+      return null;
+    };
+
+    Operation.prototype.callEvent = function() {
+      var callon;
+      if (this.custom_type != null) {
+        callon = this.getCustomType();
+      } else {
+        callon = this;
+      }
+      return this.forwardEvent.apply(this, [callon].concat(slice.call(arguments)));
+    };
+
+    Operation.prototype.forwardEvent = function() {
+      var args, f, j, len, op, ref, results;
+      op = arguments[0], args = 2 <= arguments.length ? slice.call(arguments, 1) : [];
+      ref = this.event_listeners;
+      results = [];
+      for (j = 0, len = ref.length; j < len; j++) {
+        f = ref[j];
+        results.push(f.call.apply(f, [op].concat(slice.call(args))));
+      }
+      return results;
+    };
+
+    Operation.prototype.isDeleted = function() {
+      return this.is_deleted;
+    };
+
+    Operation.prototype.applyDelete = function(garbagecollect) {
+      if (garbagecollect == null) {
+        garbagecollect = true;
+      }
+      if (!this.garbage_collected) {
+        this.is_deleted = true;
+        if (garbagecollect) {
+          this.garbage_collected = true;
+          return this.HB.addToGarbageCollector(this);
+        }
+      }
+    };
+
+    Operation.prototype.cleanup = function() {
+      this.HB.removeOperation(this);
+      return this.deleteAllObservers();
+    };
+
+    Operation.prototype.setParent = function(parent1) {
+      this.parent = parent1;
+    };
+
+    Operation.prototype.getParent = function() {
+      return this.parent;
+    };
+
+    Operation.prototype.getUid = function() {
+      var map_uid;
+      if (this.uid.noOperation == null) {
+        return this.uid;
+      } else {
+        if (this.uid.alt != null) {
+          map_uid = this.uid.alt.cloneUid();
+          map_uid.sub = this.uid.sub;
+          return map_uid;
+        } else {
+          return void 0;
+        }
+      }
+    };
+
+    Operation.prototype.cloneUid = function() {
+      var n, ref, uid, v;
+      uid = {};
+      ref = this.getUid();
+      for (n in ref) {
+        v = ref[n];
+        uid[n] = v;
+      }
+      return uid;
+    };
+
+    Operation.prototype.execute = function() {
+      var j, l, len;
+      if (this.validateSavedOperations()) {
+        this.is_executed = true;
+        if (this.uid == null) {
+          this.uid = this.HB.getNextOperationIdentifier();
+        }
+        if (this.uid.noOperation == null) {
+          this.HB.addOperation(this);
+          for (j = 0, len = execution_listener.length; j < len; j++) {
+            l = execution_listener[j];
+            l(this._encode());
+          }
+        }
+        return this;
+      } else {
+        return false;
+      }
+    };
+
+    Operation.prototype.saveOperation = function(name, op, base) {
+      var base1, dest, j, last_path, len, path, paths;
+      if (base == null) {
+        base = "this";
+      }
+      if ((op != null) && (op._getModel != null)) {
+        op = op._getModel(this.custom_types, this.operations);
+      }
+      if (op == null) {
+
+      } else if ((op.execute != null) || !((op.op_number != null) && (op.creator != null))) {
+        if (base === "this") {
+          return this[name] = op;
+        } else {
+          dest = this[base];
+          paths = name.split("/");
+          last_path = paths.pop();
+          for (j = 0, len = paths.length; j < len; j++) {
+            path = paths[j];
+            dest = dest[path];
+          }
+          return dest[last_path] = op;
+        }
+      } else {
+        if (this.unchecked == null) {
+          this.unchecked = {};
+        }
+        if ((base1 = this.unchecked)[base] == null) {
+          base1[base] = {};
+        }
+        return this.unchecked[base][name] = op;
+      }
+    };
+
+    Operation.prototype.validateSavedOperations = function() {
+      var base, base_name, dest, j, last_path, len, name, op, op_uid, path, paths, ref, success, uninstantiated;
+      uninstantiated = {};
+      success = true;
+      ref = this.unchecked;
+      for (base_name in ref) {
+        base = ref[base_name];
+        for (name in base) {
+          op_uid = base[name];
+          op = this.HB.getOperation(op_uid);
+          if (op) {
+            if (base_name === "this") {
+              this[name] = op;
+            } else {
+              dest = this[base_name];
+              paths = name.split("/");
+              last_path = paths.pop();
+              for (j = 0, len = paths.length; j < len; j++) {
+                path = paths[j];
+                dest = dest[path];
+              }
+              dest[last_path] = op;
+            }
+          } else {
+            if (uninstantiated[base_name] == null) {
+              uninstantiated[base_name] = {};
+            }
+            uninstantiated[base_name][name] = op_uid;
+            success = false;
+          }
+        }
+      }
+      if (!success) {
+        this.unchecked = uninstantiated;
+        return false;
+      } else {
+        delete this.unchecked;
+        return this;
+      }
+    };
+
+    Operation.prototype.getCustomType = function() {
+      var Type, j, len, ref, t;
+      if (this.custom_type == null) {
+        return this;
+      } else {
+        if (this.custom_type.constructor === String) {
+          Type = this.custom_types;
+          ref = this.custom_type.split(".");
+          for (j = 0, len = ref.length; j < len; j++) {
+            t = ref[j];
+            Type = Type[t];
+          }
+          this.custom_type = new Type();
+          this.custom_type._setModel(this);
+        }
+        return this.custom_type;
+      }
+    };
+
+    Operation.prototype._encode = function(json) {
+      var n, o, operations, ref, ref1;
+      if (json == null) {
+        json = {};
+      }
+      json.type = this.type;
+      json.uid = this.getUid();
+      if (this.custom_type != null) {
+        if (this.custom_type.constructor === String) {
+          json.custom_type = this.custom_type;
+        } else {
+          json.custom_type = this.custom_type._name;
+        }
+      }
+      if (((ref = this.content) != null ? ref.getUid : void 0) != null) {
+        json.content = this.content.getUid();
+      } else {
+        json.content = this.content;
+      }
+      if (this.content_operations != null) {
+        operations = {};
+        ref1 = this.content_operations;
+        for (n in ref1) {
+          o = ref1[n];
+          if (o._getModel != null) {
+            o = o._getModel(this.custom_types, this.operations);
+          }
+          operations[n] = o.getUid();
+        }
+        json.content_operations = operations;
+      }
+      return json;
+    };
+
+    return Operation;
+
+  })();
+  ops.Delete = (function(superClass) {
+    extend(Delete, superClass);
+
+    function Delete(custom_type, uid, deletes) {
+      this.saveOperation('deletes', deletes);
+      Delete.__super__.constructor.call(this, custom_type, uid);
+    }
+
+    Delete.prototype.type = "Delete";
+
+    Delete.prototype._encode = function() {
+      return {
+        'type': "Delete",
+        'uid': this.getUid(),
+        'deletes': this.deletes.getUid()
+      };
+    };
+
+    Delete.prototype.execute = function() {
+      var res;
+      if (this.validateSavedOperations()) {
+        res = Delete.__super__.execute.apply(this, arguments);
+        if (res) {
+          this.deletes.applyDelete(this);
+        }
+        return res;
+      } else {
+        return false;
+      }
+    };
+
+    return Delete;
+
+  })(ops.Operation);
+  ops.Delete.parse = function(o) {
+    var deletes_uid, uid;
+    uid = o['uid'], deletes_uid = o['deletes'];
+    return new this(null, uid, deletes_uid);
+  };
+  ops.Insert = (function(superClass) {
+    extend(Insert, superClass);
+
+    function Insert(custom_type, content, content_operations, parent, uid, prev_cl, next_cl, origin) {
+      this.saveOperation('parent', parent);
+      this.saveOperation('prev_cl', prev_cl);
+      this.saveOperation('next_cl', next_cl);
+      if (origin != null) {
+        this.saveOperation('origin', origin);
+      } else {
+        this.saveOperation('origin', prev_cl);
+      }
+      Insert.__super__.constructor.call(this, custom_type, uid, content, content_operations);
+    }
+
+    Insert.prototype.type = "Insert";
+
+    Insert.prototype.val = function() {
+      return this.getContent();
+    };
+
+    Insert.prototype.getNext = function(i) {
+      var n;
+      if (i == null) {
+        i = 1;
+      }
+      n = this;
+      while (i > 0 && (n.next_cl != null)) {
+        n = n.next_cl;
+        if (!n.is_deleted) {
+          i--;
+        }
+      }
+      if (n.is_deleted) {
+        null;
+      }
+      return n;
+    };
+
+    Insert.prototype.getPrev = function(i) {
+      var n;
+      if (i == null) {
+        i = 1;
+      }
+      n = this;
+      while (i > 0 && (n.prev_cl != null)) {
+        n = n.prev_cl;
+        if (!n.is_deleted) {
+          i--;
+        }
+      }
+      if (n.is_deleted) {
+        return null;
+      } else {
+        return n;
+      }
+    };
+
+    Insert.prototype.applyDelete = function(o) {
+      var callLater, garbagecollect;
+      if (this.deleted_by == null) {
+        this.deleted_by = [];
+      }
+      callLater = false;
+      if ((this.parent != null) && !this.is_deleted && (o != null)) {
+        callLater = true;
+      }
+      if (o != null) {
+        this.deleted_by.push(o);
+      }
+      garbagecollect = false;
+      if (this.next_cl.isDeleted()) {
+        garbagecollect = true;
+      }
+      Insert.__super__.applyDelete.call(this, garbagecollect);
+      if (callLater) {
+        this.parent.callOperationSpecificDeleteEvents(this, o);
+      }
+      if ((this.prev_cl != null) && this.prev_cl.isDeleted() && this.prev_cl.garbage_collected !== true) {
+        return this.prev_cl.applyDelete();
+      }
+    };
+
+    Insert.prototype.cleanup = function() {
+      var d, j, len, o, ref;
+      if (this.next_cl.isDeleted()) {
+        ref = this.deleted_by;
+        for (j = 0, len = ref.length; j < len; j++) {
+          d = ref[j];
+          d.cleanup();
+        }
+        o = this.next_cl;
+        while (o.type !== "Delimiter") {
+          if (o.origin === this) {
+            o.origin = this.prev_cl;
+          }
+          o = o.next_cl;
+        }
+        this.prev_cl.next_cl = this.next_cl;
+        this.next_cl.prev_cl = this.prev_cl;
+        if (this.content instanceof ops.Operation && !(this.content instanceof ops.Insert)) {
+          this.content.referenced_by--;
+          if (this.content.referenced_by <= 0 && !this.content.is_deleted) {
+            this.content.applyDelete();
+          }
+        }
+        delete this.content;
+        return Insert.__super__.cleanup.apply(this, arguments);
+      }
+    };
+
+    Insert.prototype.getDistanceToOrigin = function() {
+      var d, o;
+      d = 0;
+      o = this.prev_cl;
+      while (true) {
+        if (this.origin === o) {
+          break;
+        }
+        d++;
+        o = o.prev_cl;
+      }
+      return d;
+    };
+
+    Insert.prototype.execute = function() {
+      var base1, distance_to_origin, i, o;
+      if (!this.validateSavedOperations()) {
+        return false;
+      } else {
+        if (this.content instanceof ops.Operation) {
+          this.content.insert_parent = this;
+          if ((base1 = this.content).referenced_by == null) {
+            base1.referenced_by = 0;
+          }
+          this.content.referenced_by++;
+        }
+        if (this.parent != null) {
+          if (this.prev_cl == null) {
+            this.prev_cl = this.parent.beginning;
+          }
+          if (this.origin == null) {
+            this.origin = this.prev_cl;
+          } else if (this.origin === "Delimiter") {
+            this.origin = this.parent.beginning;
+          }
+          if (this.next_cl == null) {
+            this.next_cl = this.parent.end;
+          }
+        }
+        if (this.prev_cl != null) {
+          distance_to_origin = this.getDistanceToOrigin();
+          o = this.prev_cl.next_cl;
+          i = distance_to_origin;
+          while (true) {
+            if (o !== this.next_cl) {
+              if (o.getDistanceToOrigin() === i) {
+                if (o.uid.creator < this.uid.creator) {
+                  this.prev_cl = o;
+                  distance_to_origin = i + 1;
+                } else {
+
+                }
+              } else if (o.getDistanceToOrigin() < i) {
+                if (i - distance_to_origin <= o.getDistanceToOrigin()) {
+                  this.prev_cl = o;
+                  distance_to_origin = i + 1;
+                } else {
+
+                }
+              } else {
+                break;
+              }
+              i++;
+              o = o.next_cl;
+            } else {
+              break;
+            }
+          }
+          this.next_cl = this.prev_cl.next_cl;
+          this.prev_cl.next_cl = this;
+          this.next_cl.prev_cl = this;
+        }
+        this.setParent(this.prev_cl.getParent());
+        Insert.__super__.execute.apply(this, arguments);
+        this.parent.callOperationSpecificInsertEvents(this);
+        return this;
+      }
+    };
+
+    Insert.prototype.getPosition = function() {
+      var position, prev;
+      position = 0;
+      prev = this.prev_cl;
+      while (true) {
+        if (prev instanceof ops.Delimiter) {
+          break;
+        }
+        if (!prev.isDeleted()) {
+          position++;
+        }
+        prev = prev.prev_cl;
+      }
+      return position;
+    };
+
+    Insert.prototype._encode = function(json) {
+      if (json == null) {
+        json = {};
+      }
+      json.prev = this.prev_cl.getUid();
+      json.next = this.next_cl.getUid();
+      if (this.origin.type === "Delimiter") {
+        json.origin = "Delimiter";
+      } else if (this.origin !== this.prev_cl) {
+        json.origin = this.origin.getUid();
+      }
+      json.parent = this.parent.getUid();
+      return Insert.__super__._encode.call(this, json);
+    };
+
+    return Insert;
+
+  })(ops.Operation);
+  ops.Insert.parse = function(json) {
+    var content, content_operations, next, origin, parent, prev, uid;
+    content = json['content'], content_operations = json['content_operations'], uid = json['uid'], prev = json['prev'], next = json['next'], origin = json['origin'], parent = json['parent'];
+    return new this(null, content, content_operations, parent, uid, prev, next, origin);
+  };
+  ops.Delimiter = (function(superClass) {
+    extend(Delimiter, superClass);
+
+    function Delimiter(prev_cl, next_cl, origin) {
+      this.saveOperation('prev_cl', prev_cl);
+      this.saveOperation('next_cl', next_cl);
+      this.saveOperation('origin', prev_cl);
+      Delimiter.__super__.constructor.call(this, null, {
+        noOperation: true
+      });
+    }
+
+    Delimiter.prototype.type = "Delimiter";
+
+    Delimiter.prototype.applyDelete = function() {
+      var o;
+      Delimiter.__super__.applyDelete.call(this);
+      o = this.prev_cl;
+      while (o != null) {
+        o.applyDelete();
+        o = o.prev_cl;
+      }
+      return void 0;
+    };
+
+    Delimiter.prototype.cleanup = function() {
+      return Delimiter.__super__.cleanup.call(this);
+    };
+
+    Delimiter.prototype.execute = function() {
+      var ref, ref1;
+      if (((ref = this.unchecked) != null ? ref['next_cl'] : void 0) != null) {
+        return Delimiter.__super__.execute.apply(this, arguments);
+      } else if ((ref1 = this.unchecked) != null ? ref1['prev_cl'] : void 0) {
+        if (this.validateSavedOperations()) {
+          if (this.prev_cl.next_cl != null) {
+            throw new Error("Probably duplicated operations");
+          }
+          this.prev_cl.next_cl = this;
+          return Delimiter.__super__.execute.apply(this, arguments);
+        } else {
+          return false;
+        }
+      } else if ((this.prev_cl != null) && (this.prev_cl.next_cl == null)) {
+        delete this.prev_cl.unchecked.next_cl;
+        this.prev_cl.next_cl = this;
+        return Delimiter.__super__.execute.apply(this, arguments);
+      } else if ((this.prev_cl != null) || (this.next_cl != null) || true) {
+        return Delimiter.__super__.execute.apply(this, arguments);
+      }
+    };
+
+    Delimiter.prototype._encode = function() {
+      var ref, ref1;
+      return {
+        'type': this.type,
+        'uid': this.getUid(),
+        'prev': (ref = this.prev_cl) != null ? ref.getUid() : void 0,
+        'next': (ref1 = this.next_cl) != null ? ref1.getUid() : void 0
+      };
+    };
+
+    return Delimiter;
+
+  })(ops.Operation);
+  ops.Delimiter.parse = function(json) {
+    var next, prev, uid;
+    uid = json['uid'], prev = json['prev'], next = json['next'];
+    return new this(uid, prev, next);
+  };
+  return {
+    'operations': ops,
+    'execution_listener': execution_listener
+  };
+};

build/node/Operations/Structured.js

@@ -0,0 +1,579 @@
+var basic_ops_uninitialized,
+  extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
+  hasProp = {}.hasOwnProperty;
+
+basic_ops_uninitialized = require("./Basic");
+
+module.exports = function() {
+  var basic_ops, ops;
+  basic_ops = basic_ops_uninitialized();
+  ops = basic_ops.operations;
+  ops.MapManager = (function(superClass) {
+    extend(MapManager, superClass);
+
+    function MapManager(custom_type, uid, content, content_operations) {
+      this._map = {};
+      MapManager.__super__.constructor.call(this, custom_type, uid, content, content_operations);
+    }
+
+    MapManager.prototype.type = "MapManager";
+
+    MapManager.prototype.applyDelete = function() {
+      var name, p, ref;
+      ref = this._map;
+      for (name in ref) {
+        p = ref[name];
+        p.applyDelete();
+      }
+      return MapManager.__super__.applyDelete.call(this);
+    };
+
+    MapManager.prototype.cleanup = function() {
+      return MapManager.__super__.cleanup.call(this);
+    };
+
+    MapManager.prototype.map = function(f) {
+      var n, ref, v;
+      ref = this._map;
+      for (n in ref) {
+        v = ref[n];
+        f(n, v);
+      }
+      return void 0;
+    };
+
+    MapManager.prototype.val = function(name, content) {
+      var o, prop, ref, rep, res, result;
+      if (arguments.length > 1) {
+        if ((content != null) && (content._getModel != null)) {
+          rep = content._getModel(this.custom_types, this.operations);
+        } else {
+          rep = content;
+        }
+        this.retrieveSub(name).replace(rep);
+        return this.getCustomType();
+      } else if (name != null) {
+        prop = this._map[name];
+        if ((prop != null) && !prop.isContentDeleted()) {
+          res = prop.val();
+          if (res instanceof ops.Operation) {
+            return res.getCustomType();
+          } else {
+            return res;
+          }
+        } else {
+          return void 0;
+        }
+      } else {
+        result = {};
+        ref = this._map;
+        for (name in ref) {
+          o = ref[name];
+          if (!o.isContentDeleted()) {
+            result[name] = o.val();
+          }
+        }
+        return result;
+      }
+    };
+
+    MapManager.prototype["delete"] = function(name) {
+      var ref;
+      if ((ref = this._map[name]) != null) {
+        ref.deleteContent();
+      }
+      return this;
+    };
+
+    MapManager.prototype.retrieveSub = function(property_name) {
+      var event_properties, event_this, rm, rm_uid;
+      if (this._map[property_name] == null) {
+        event_properties = {
+          name: property_name
+        };
+        event_this = this;
+        rm_uid = {
+          noOperation: true,
+          sub: property_name,
+          alt: this
+        };
+        rm = new ops.ReplaceManager(null, event_properties, event_this, rm_uid);
+        this._map[property_name] = rm;
+        rm.setParent(this, property_name);
+        rm.execute();
+      }
+      return this._map[property_name];
+    };
+
+    return MapManager;
+
+  })(ops.Operation);
+  ops.MapManager.parse = function(json) {
+    var content, content_operations, custom_type, uid;
+    uid = json['uid'], custom_type = json['custom_type'], content = json['content'], content_operations = json['content_operations'];
+    return new this(custom_type, uid, content, content_operations);
+  };
+  ops.ListManager = (function(superClass) {
+    extend(ListManager, superClass);
+
+    function ListManager(custom_type, uid, content, content_operations) {
+      this.beginning = new ops.Delimiter(void 0, void 0);
+      this.end = new ops.Delimiter(this.beginning, void 0);
+      this.beginning.next_cl = this.end;
+      this.beginning.execute();
+      this.end.execute();
+      ListManager.__super__.constructor.call(this, custom_type, uid, content, content_operations);
+    }
+
+    ListManager.prototype.type = "ListManager";
+
+    ListManager.prototype.applyDelete = function() {
+      var o;
+      o = this.beginning;
+      while (o != null) {
+        o.applyDelete();
+        o = o.next_cl;
+      }
+      return ListManager.__super__.applyDelete.call(this);
+    };
+
+    ListManager.prototype.cleanup = function() {
+      return ListManager.__super__.cleanup.call(this);
+    };
+
+    ListManager.prototype.toJson = function(transform_to_value) {
+      var i, j, len, o, results, val;
+      if (transform_to_value == null) {
+        transform_to_value = false;
+      }
+      val = this.val();
+      results = [];
+      for (o = j = 0, len = val.length; j < len; o = ++j) {
+        i = val[o];
+        if (o instanceof ops.Object) {
+          results.push(o.toJson(transform_to_value));
+        } else if (o instanceof ops.ListManager) {
+          results.push(o.toJson(transform_to_value));
+        } else if (transform_to_value && o instanceof ops.Operation) {
+          results.push(o.val());
+        } else {
+          results.push(o);
+        }
+      }
+      return results;
+    };
+
+    ListManager.prototype.execute = function() {
+      if (this.validateSavedOperations()) {
+        this.beginning.setParent(this);
+        this.end.setParent(this);
+        return ListManager.__super__.execute.apply(this, arguments);
+      } else {
+        return false;
+      }
+    };
+
+    ListManager.prototype.getLastOperation = function() {
+      return this.end.prev_cl;
+    };
+
+    ListManager.prototype.getFirstOperation = function() {
+      return this.beginning.next_cl;
+    };
+
+    ListManager.prototype.toArray = function() {
+      var o, result;
+      o = this.beginning.next_cl;
+      result = [];
+      while (o !== this.end) {
+        if (!o.is_deleted) {
+          result.push(o.val());
+        }
+        o = o.next_cl;
+      }
+      return result;
+    };
+
+    ListManager.prototype.map = function(f) {
+      var o, result;
+      o = this.beginning.next_cl;
+      result = [];
+      while (o !== this.end) {
+        if (!o.is_deleted) {
+          result.push(f(o));
+        }
+        o = o.next_cl;
+      }
+      return result;
+    };
+
+    ListManager.prototype.fold = function(init, f) {
+      var o;
+      o = this.beginning.next_cl;
+      while (o !== this.end) {
+        if (!o.is_deleted) {
+          init = f(init, o);
+        }
+        o = o.next_cl;
+      }
+      return init;
+    };
+
+    ListManager.prototype.val = function(pos) {
+      var o;
+      if (pos != null) {
+        o = this.getOperationByPosition(pos + 1);
+        if (!(o instanceof ops.Delimiter)) {
+          return o.val();
+        } else {
+          throw new Error("this position does not exist");
+        }
+      } else {
+        return this.toArray();
+      }
+    };
+
+    ListManager.prototype.ref = function(pos) {
+      var o;
+      if (pos != null) {
+        o = this.getOperationByPosition(pos + 1);
+        if (!(o instanceof ops.Delimiter)) {
+          return o;
+        } else {
+          return null;
+        }
+      } else {
+        throw new Error("you must specify a position parameter");
+      }
+    };
+
+    ListManager.prototype.getOperationByPosition = function(position) {
+      var o;
+      o = this.beginning;
+      while (true) {
+        if (o instanceof ops.Delimiter && (o.prev_cl != null)) {
+          o = o.prev_cl;
+          while (o.isDeleted() && (o.prev_cl != null)) {
+            o = o.prev_cl;
+          }
+          break;
+        }
+        if (position <= 0 && !o.isDeleted()) {
+          break;
+        }
+        o = o.next_cl;
+        if (!o.isDeleted()) {
+          position -= 1;
+        }
+      }
+      return o;
+    };
+
+    ListManager.prototype.push = function(content) {
+      return this.insertAfter(this.end.prev_cl, [content]);
+    };
+
+    ListManager.prototype.insertAfter = function(left, contents) {
+      var c, j, len, right, tmp;
+      right = left.next_cl;
+      while (right.isDeleted()) {
+        right = right.next_cl;
+      }
+      left = right.prev_cl;
+      if (contents instanceof ops.Operation) {
+        (new ops.Insert(null, content, null, void 0, void 0, left, right)).execute();
+      } else {
+        for (j = 0, len = contents.length; j < len; j++) {
+          c = contents[j];
+          if ((c != null) && (c._name != null) && (c._getModel != null)) {
+            c = c._getModel(this.custom_types, this.operations);
+          }
+          tmp = (new ops.Insert(null, c, null, void 0, void 0, left, right)).execute();
+          left = tmp;
+        }
+      }
+      return this;
+    };
+
+    ListManager.prototype.insert = function(position, contents) {
+      var ith;
+      ith = this.getOperationByPosition(position);
+      return this.insertAfter(ith, contents);
+    };
+
+    ListManager.prototype["delete"] = function(position, length) {
+      var d, delete_ops, i, j, o, ref;
+      if (length == null) {
+        length = 1;
+      }
+      o = this.getOperationByPosition(position + 1);
+      delete_ops = [];
+      for (i = j = 0, ref = length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
+        if (o instanceof ops.Delimiter) {
+          break;
+        }
+        d = (new ops.Delete(null, void 0, o)).execute();
+        o = o.next_cl;
+        while ((!(o instanceof ops.Delimiter)) && o.isDeleted()) {
+          o = o.next_cl;
+        }
+        delete_ops.push(d._encode());
+      }
+      return this;
+    };
+
+    ListManager.prototype.callOperationSpecificInsertEvents = function(op) {
+      var getContentType;
+      getContentType = function(content) {
+        if (content instanceof ops.Operation) {
+          return content.getCustomType();
+        } else {
+          return content;
+        }
+      };
+      return this.callEvent([
+        {
+          type: "insert",
+          reference: op,
+          position: op.getPosition(),
+          object: this.getCustomType(),
+          changedBy: op.uid.creator,
+          value: getContentType(op.val())
+        }
+      ]);
+    };
+
+    ListManager.prototype.callOperationSpecificDeleteEvents = function(op, del_op) {
+      return this.callEvent([
+        {
+          type: "delete",
+          reference: op,
+          position: op.getPosition(),
+          object: this.getCustomType(),
+          length: 1,
+          changedBy: del_op.uid.creator,
+          oldValue: op.val()
+        }
+      ]);
+    };
+
+    return ListManager;
+
+  })(ops.Operation);
+  ops.ListManager.parse = function(json) {
+    var content, content_operations, custom_type, uid;
+    uid = json['uid'], custom_type = json['custom_type'], content = json['content'], content_operations = json['content_operations'];
+    return new this(custom_type, uid, content, content_operations);
+  };
+  ops.Composition = (function(superClass) {
+    extend(Composition, superClass);
+
+    function Composition(custom_type, _composition_value, composition_value_operations, uid, tmp_composition_ref) {
+      var n, o;
+      this._composition_value = _composition_value;
+      Composition.__super__.constructor.call(this, custom_type, uid);
+      if (tmp_composition_ref != null) {
+        this.tmp_composition_ref = tmp_composition_ref;
+      } else {
+        this.composition_ref = this.end.prev_cl;
+      }
+      if (composition_value_operations != null) {
+        this.composition_value_operations = {};
+        for (n in composition_value_operations) {
+          o = composition_value_operations[n];
+          this.saveOperation(n, o, '_composition_value');
+        }
+      }
+    }
+
+    Composition.prototype.type = "Composition";
+
+    Composition.prototype.execute = function() {
+      var composition_ref;
+      if (this.validateSavedOperations()) {
+        this.getCustomType()._setCompositionValue(this._composition_value);
+        delete this._composition_value;
+        if (this.tmp_composition_ref) {
+          composition_ref = this.HB.getOperation(this.tmp_composition_ref);
+          if (composition_ref != null) {
+            delete this.tmp_composition_ref;
+            this.composition_ref = composition_ref;
+          }
+        }
+        return Composition.__super__.execute.apply(this, arguments);
+      } else {
+        return false;
+      }
+    };
+
+    Composition.prototype.callOperationSpecificInsertEvents = function(op) {
+      var o;
+      if (this.tmp_composition_ref != null) {
+        if (op.uid.creator === this.tmp_composition_ref.creator && op.uid.op_number === this.tmp_composition_ref.op_number) {
+          this.composition_ref = op;
+          delete this.tmp_composition_ref;
+          op = op.next_cl;
+          if (op === this.end) {
+            return;
+          }
+        } else {
+          return;
+        }
+      }
+      o = this.end.prev_cl;
+      while (o !== op) {
+        this.getCustomType()._unapply(o.undo_delta);
+        o = o.prev_cl;
+      }
+      while (o !== this.end) {
+        o.undo_delta = this.getCustomType()._apply(o.val());
+        o = o.next_cl;
+      }
+      this.composition_ref = this.end.prev_cl;
+      return this.callEvent([
+        {
+          type: "update",
+          changedBy: op.uid.creator,
+          newValue: this.val()
+        }
+      ]);
+    };
+
+    Composition.prototype.callOperationSpecificDeleteEvents = function(op, del_op) {};
+
+    Composition.prototype.applyDelta = function(delta, operations) {
+      (new ops.Insert(null, delta, operations, this, null, this.end.prev_cl, this.end)).execute();
+      return void 0;
+    };
+
+    Composition.prototype._encode = function(json) {
+      var custom, n, o, ref;
+      if (json == null) {
+        json = {};
+      }
+      custom = this.getCustomType()._getCompositionValue();
+      json.composition_value = custom.composition_value;
+      if (custom.composition_value_operations != null) {
+        json.composition_value_operations = {};
+        ref = custom.composition_value_operations;
+        for (n in ref) {
+          o = ref[n];
+          json.composition_value_operations[n] = o.getUid();
+        }
+      }
+      if (this.composition_ref != null) {
+        json.composition_ref = this.composition_ref.getUid();
+      } else {
+        json.composition_ref = this.tmp_composition_ref;
+      }
+      return Composition.__super__._encode.call(this, json);
+    };
+
+    return Composition;
+
+  })(ops.ListManager);
+  ops.Composition.parse = function(json) {
+    var composition_ref, composition_value, composition_value_operations, custom_type, uid;
+    uid = json['uid'], custom_type = json['custom_type'], composition_value = json['composition_value'], composition_value_operations = json['composition_value_operations'], composition_ref = json['composition_ref'];
+    return new this(custom_type, composition_value, composition_value_operations, uid, composition_ref);
+  };
+  ops.ReplaceManager = (function(superClass) {
+    extend(ReplaceManager, superClass);
+
+    function ReplaceManager(custom_type, event_properties1, event_this1, uid) {
+      this.event_properties = event_properties1;
+      this.event_this = event_this1;
+      if (this.event_properties['object'] == null) {
+        this.event_properties['object'] = this.event_this.getCustomType();
+      }
+      ReplaceManager.__super__.constructor.call(this, custom_type, uid);
+    }
+
+    ReplaceManager.prototype.type = "ReplaceManager";
+
+    ReplaceManager.prototype.callEventDecorator = function(events) {
+      var event, j, len, name, prop, ref;
+      if (!this.isDeleted()) {
+        for (j = 0, len = events.length; j < len; j++) {
+          event = events[j];
+          ref = this.event_properties;
+          for (name in ref) {
+            prop = ref[name];
+            event[name] = prop;
+          }
+        }
+        this.event_this.callEvent(events);
+      }
+      return void 0;
+    };
+
+    ReplaceManager.prototype.callOperationSpecificInsertEvents = function(op) {
+      var old_value;
+      if (op.next_cl.type === "Delimiter" && op.prev_cl.type !== "Delimiter") {
+        if (!op.is_deleted) {
+          old_value = op.prev_cl.val();
+          this.callEventDecorator([
+            {
+              type: "update",
+              changedBy: op.uid.creator,
+              oldValue: old_value
+            }
+          ]);
+        }
+        op.prev_cl.applyDelete();
+      } else if (op.next_cl.type !== "Delimiter") {
+        op.applyDelete();
+      } else {
+        this.callEventDecorator([
+          {
+            type: "add",
+            changedBy: op.uid.creator
+          }
+        ]);
+      }
+      return void 0;
+    };
+
+    ReplaceManager.prototype.callOperationSpecificDeleteEvents = function(op, del_op) {
+      if (op.next_cl.type === "Delimiter") {
+        return this.callEventDecorator([
+          {
+            type: "delete",
+            changedBy: del_op.uid.creator,
+            oldValue: op.val()
+          }
+        ]);
+      }
+    };
+
+    ReplaceManager.prototype.replace = function(content, replaceable_uid) {
+      var o, relp;
+      o = this.getLastOperation();
+      relp = (new ops.Insert(null, content, null, this, replaceable_uid, o, o.next_cl)).execute();
+      return void 0;
+    };
+
+    ReplaceManager.prototype.isContentDeleted = function() {
+      return this.getLastOperation().isDeleted();
+    };
+
+    ReplaceManager.prototype.deleteContent = function() {
+      var last_op;
+      last_op = this.getLastOperation();
+      if ((!last_op.isDeleted()) && last_op.type !== "Delimiter") {
+        (new ops.Delete(null, void 0, this.getLastOperation().uid)).execute();
+      }
+      return void 0;
+    };
+
+    ReplaceManager.prototype.val = function() {
+      var o;
+      o = this.getLastOperation();
+      return typeof o.val === "function" ? o.val() : void 0;
+    };
+
+    return ReplaceManager;
+
+  })(ops.ListManager);
+  return basic_ops;
+};

build/node/y-object.js

@@ -0,0 +1,90 @@
+var bindToChildren;
+
+bindToChildren = function(that) {
+  var attr, i, j, ref;
+  for (i = j = 0, ref = that.children.length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
+    attr = that.children.item(i);
+    if (attr.name != null) {
+      attr.val = that.val.val(attr.name);
+    }
+  }
+  return that.val.observe(function(events) {
+    var event, k, len, newVal, results;
+    results = [];
+    for (k = 0, len = events.length; k < len; k++) {
+      event = events[k];
+      if (event.name != null) {
+        results.push((function() {
+          var l, ref1, results1;
+          results1 = [];
+          for (i = l = 0, ref1 = that.children.length; 0 <= ref1 ? l < ref1 : l > ref1; i = 0 <= ref1 ? ++l : --l) {
+            attr = that.children.item(i);
+            if ((attr.name != null) && attr.name === event.name) {
+              newVal = that.val.val(attr.name);
+              if (attr.val !== newVal) {
+                results1.push(attr.val = newVal);
+              } else {
+                results1.push(void 0);
+              }
+            } else {
+              results1.push(void 0);
+            }
+          }
+          return results1;
+        })());
+      } else {
+        results.push(void 0);
+      }
+    }
+    return results;
+  });
+};
+
+Polymer("y-object", {
+  ready: function() {
+    if (this.connector != null) {
+      this.val = new Y(this.connector);
+      return bindToChildren(this);
+    } else if (this.val != null) {
+      return bindToChildren(this);
+    }
+  },
+  valChanged: function() {
+    if ((this.val != null) && this.val._name === "Object") {
+      return bindToChildren(this);
+    }
+  },
+  connectorChanged: function() {
+    if (this.val == null) {
+      this.val = new Y(this.connector);
+      return bindToChildren(this);
+    }
+  }
+});
+
+Polymer("y-property", {
+  ready: function() {
+    if ((this.val != null) && (this.name != null)) {
+      if (this.val.constructor === Object) {
+        this.val = this.parentElement.val(this.name, new Y.Object(this.val)).val(this.name);
+      } else if (typeof this.val === "string") {
+        this.parentElement.val(this.name, this.val);
+      }
+      if (this.val._name === "Object") {
+        return bindToChildren(this);
+      }
+    }
+  },
+  valChanged: function() {
+    var ref;
+    if ((this.val != null) && (this.name != null)) {
+      if (this.val.constructor === Object) {
+        return this.val = this.parentElement.val.val(this.name, new Y.Object(this.val)).val(this.name);
+      } else if (this.val._name === "Object") {
+        return bindToChildren(this);
+      } else if ((((ref = this.parentElement.val) != null ? ref.val : void 0) != null) && this.val !== this.parentElement.val.val(this.name)) {
+        return this.parentElement.val.val(this.name, this.val);
+      }
+    }
+  }
+});

build/node/y.js

@@ -0,0 +1,45 @@
+var Engine, HistoryBuffer, adaptConnector, createY, structured_ops_uninitialized;
+
+structured_ops_uninitialized = require("./Operations/Structured");
+
+HistoryBuffer = require("./HistoryBuffer");
+
+Engine = require("./Engine");
+
+adaptConnector = require("./ConnectorAdapter");
+
+createY = function(connector) {
+  var HB, ct, engine, model, ops, ops_manager, user_id;
+  if (connector.user_id != null) {
+    user_id = connector.user_id;
+  } else {
+    user_id = "_temp";
+    connector.when_received_state_vector_listeners = [
+      function(state_vector) {
+        return HB.setUserId(this.user_id, state_vector);
+      }
+    ];
+  }
+  HB = new HistoryBuffer(user_id);
+  ops_manager = structured_ops_uninitialized(HB, this.constructor);
+  ops = ops_manager.operations;
+  engine = new Engine(HB, ops);
+  adaptConnector(connector, engine, HB, ops_manager.execution_listener);
+  ops.Operation.prototype.HB = HB;
+  ops.Operation.prototype.operations = ops;
+  ops.Operation.prototype.engine = engine;
+  ops.Operation.prototype.connector = connector;
+  ops.Operation.prototype.custom_types = this.constructor;
+  ct = new createY.Object();
+  model = new ops.MapManager(ct, HB.getReservedUniqueIdentifier()).execute();
+  ct._setModel(model);
+  return ct;
+};
+
+module.exports = createY;
+
+if (typeof window !== "undefined" && window !== null) {
+  window.Y = createY;
+}
+
+createY.Object = require("./ObjectType");

build/test/index.html

@@ -0,0 +1,27 @@
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test Yjs!</title>
+  <link rel="stylesheet" href="../../node_modules/mocha/mocha.css" />
+</head>
+<body>
+  <div id="mocha"></div>
+  <script src="../../node_modules/mocha/mocha.js" class="awesome"></script>
+  <script>
+    mocha.setup('bdd');
+    mocha.ui('bdd');
+    mocha.reporter('html');
+  </script>
+  <script src="object-test.js"></script>
+  <script src="xml-test.js"></script>
+  <script src="list-test.js"></script>
+  <script src="text-test.js"></script>
+  <script>
+    //mocha.checkLeaks();
+    //mocha.run();
+    window.onerror = null;
+    if (window.mochaPhantomJS) { mochaPhantomJS.run(); }
+    else { mocha.run(); }
+  </script>
+</body>
+</html>

examples/.gitignore

@@ -1 +0,0 @@
-build

examples/README.md

@@ -0,0 +1,5 @@
+# Examples
+
+Here you find some (hopefully) usefull examples on how to use Yjs!
+
+Feel free to use the code of the examples in your own project. They include basic examples how to use Yjs.

examples/XMPP-Polymer/index.html

@@ -0,0 +1,14 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <meta charset=utf-8 />
+    <title>Y Example</title>
+    <script src="../../../webcomponentsjs/webcomponents.min.js"></script>
+    <link rel="import" href="../../../polymer/polymer.html">
+
+    <link rel="import" href="y-test.html">
+  </head>
+  <body>
+    <y-test></y-test>
+  </body>
+</html>

examples/XMPP-Polymer/y-test.html

@@ -0,0 +1,57 @@
+<script src="../../build/browser/y.js"></script>
+<script src="../../../y-text/build/browser/y-text.js"></script>
+<link rel="import" href="../../build/browser/y-object.html">
+<link rel="import" href="../../../y-xmpp/build/browser/y-xmpp.html">
+<link rel="import" href="../../../paper-slider/paper-slider.html">
+
+<polymer-element name="y-test" attributes="y connector stuff">
+  <template>
+    <h1 id="text" contentEditable> Check this out !</h1>
+    <y-xmpp id="connector" connector={{connector}} room="testy-xmpp-polymer" syncMode="syncAll" debug="true"></y-xmpp>
+    <y-object connector={{connector}} val={{y}}>
+      <y-property name="slider" val={{slider}}>
+      </y-property>
+      <y-property name="stuff" val={{stuff}}>
+        <y-property id="otherstuff" name="otherstuff" val={{otherstuff}}>
+        </y-property>
+      </y-property>
+    </y-object>
+    <y-object val={{otherstuff}}>
+      <y-property name="nostuff" val={{nostuff}}>
+      </y-property>
+    </y-object>
+    <paper-slider min="0" max="200" immediateValue={{slider}}></paper-slider>
+  </template>
+  <script>
+  Polymer({
+    ready: function(){
+      window.y_stuff_property = this.$.otherstuff;
+      this.y.val("slider",50)
+      var that = this;
+      this.connector.whenSynced(function(){
+        if(that.y.val("text") == null){
+          that.y.val("text",new Y.Text("stuff"));
+        }
+        that.y.val("text").bind(that.$.text,that.shadowRoot)
+      })
+
+      // Everything is initialized. Lets test stuff!
+      window.y_test = this;
+      window.y_test.y.val("stuff",{otherstuff:{nostuff:"this is no stuff"}})
+      setTimeout(function(){
+        var res = y_test.y.val("stuff");
+        if(!(y_test.nostuff === "this is no stuff")){
+          console.log("Deep inherit doesn't work!")
+        }
+        window.y_stuff_property.val = {nostuff: "this is also no stuff"};
+        setTimeout(function(){
+          if(!(y_test.nostuff === "this is also no stuff")){
+            console.log("Element val overwrite doesn't work")
+          }
+          console.log("Everything is fine :)");
+        },500)
+      },500);
+    }
+  })
+  </script>
+</polymer-element>

examples/XMPP/index.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+        <meta charset=utf-8 />
+        <title>Y Example</title>
+        <script src="../../build/browser/y.js"></script>
+        <script src="../../../y-text/build/browser/y-text.js"></script>
+        <script src="../../../y-xmpp/y-xmpp.js"></script>
+        <script src="./index.js"></script>
+</head>
+<body>
+<h1 contentEditable> yjs Tutorial</h1>
+<p> Collaborative Json editing with <a href="https://github.com/rwth-acis/yjs/">yjs</a>
+and XMPP Connector. </p>
+
+<textarea style="width:80%;" rows=40 id="textfield"></textarea>
+
+<p> <a href="https://github.com/y-js/yjs/">yjs</a> is a Framework for Real-Time collaboration on arbitrary data types.
+</p>
+</body>
+</html>

examples/XMPP/index.js

@@ -0,0 +1,26 @@
+
+
+connector = new Y.XMPP().join("testy-xmpp-json3", {syncMode: "syncAll"});
+connector.debug = true
+
+y = new Y(connector);
+
+window.onload = function(){
+  var textbox = document.getElementById("textfield");
+  y.observe(function(events){
+    for(var i=0; i<events.length; i++){
+      var event = events[i];
+      if(event.name === "textfield" && event.type !== "delete"){
+        y.val("textfield").bind(textbox);
+        y.val("headline").bind(document.querySelector("h1"))
+      }
+    }
+  });
+  connector.whenSynced(function(){
+    if(y.val("textfield") == null){
+      y.val("headline", new Y.Text("headline"));
+      y.val("textfield",new Y.Text("stuff"))
+    }
+  })
+
+};

examples/codemirror.html

@@ -1,70 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <title>Yjs CodeMirror Example</title>
-    <link rel=stylesheet href="https://codemirror.net/lib/codemirror.css">
-    <style>
-      #container {
-        border: grey;
-        border-style: solid;
-        border-width: thin;
-      }
-    </style>
-  </head>
-<body>
-  <p>This example shows how to bind a YText type to <a href="https://codemirror.net/">CodeMirror</a> editor.</p>
-  <p>The content of this editor is shared with every client who visits this domain.</p>
-  <div class="code-html">
-<style>
-.remote-caret {
-  position: absolute;
-  border-left: black;
-  border-left-style: solid;
-  border-left-width: 2px;
-  height: 1em;
-}
-.remote-caret > div {
-  position: relative;
-  top: -1.05em;
-  font-size: 13px;
-  background-color: rgb(250, 129, 0);
-  font-family: serif;
-  font-style: normal;
-  font-weight: normal;
-  line-height: normal;
-  user-select: none;
-  color: white;
-  padding-left: 2px;
-  padding-right: 2px;
-}
-</style>
-<div id="container"></div>
-  </div>
-  <!-- The actual source file for the following code is found in ./codemirror.js. Run `npm run watch` to compile the files -->
-  <script class="code-js" src="./build/codemirror.js" type="module">
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'yjs/provider/websocket.js'
-import { CodeMirrorBinding } from 'yjs/bindings/codemirror.js'
-
-import * as conf from './exampleConfig.js'
-
-import CodeMirror from 'codemirror'
-import 'codemirror/mode/javascript/javascript.js'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('codemirror')
-const ytext = ydocument.define('codemirror', Y.Text)
-
-const editor = new CodeMirror(document.querySelector('#container'), {
-    mode: 'javascript',
-    lineNumbers: true
-})
-
-const binding = new CodeMirrorBinding(ytext, editor)
-
-window.codemirrorExample = {
-  binding, editor, ytext, ydocument
-}
-  </script>
-</body>
-</html>

examples/codemirror.js

@@ -1,22 +0,0 @@
-import { WebsocketProvider } from 'y-websocket'
-import { CodeMirrorBinding } from 'y-codemirror'
-
-import * as conf from './exampleConfig.js'
-
-import CodeMirror from 'codemirror'
-import 'codemirror/mode/javascript/javascript.js'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('codemirror')
-const ytext = ydocument.getText('codemirror')
-
-const editor = new CodeMirror(document.querySelector('#container'), {
-  mode: 'javascript',
-  lineNumbers: true
-})
-
-const binding = new CodeMirrorBinding(ytext, editor)
-
-window.codemirrorExample = {
-  binding, editor, ytext, ydocument
-}

examples/dom.html

@@ -1,37 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <title>Yjs Prosemirror Example</title>
-    <link rel=stylesheet href="https://prosemirror.net/css/editor.css">
-    <style>
-      #content {
-        min-height: 500px;
-      }
-    </style>
-</head>
-<body>
-  <p>This example shows how to bind a YXmlFragment type to an arbitrary DOM element. We set the DOM element to contenteditable so it basically behaves like a very powerful rich-text editor.</p>
-  <p>The content of this editor is shared with every client who visits this domain.</p>
-  <hr>
-  <div class="code-html">
-
-<div id="content" contenteditable=""></div>
-  </div>
-  <!-- The actual source file for the following code is found in ./dom.js. Run `npm run watch` to compile the files -->
-  <script class="code-js" src="./build/dom.js" type="module">
-    import * as Y from 'yjs/index.js'
-    import { WebsocketProvider } from 'yjs/provider/websocket.js'
-    import { DomBinding } from 'yjs/bindings/dom.js'
-    import * as conf from './exampleConfig.js'
-
-    const provider = new WebsocketProvider(conf.serverAddress)
-    const ydocument = provider.get('dom')
-    const type = ydocument.define('xml', Y.XmlFragment)
-    const binding = new DomBinding(type, document.querySelector('#content'), { scrollingElement: document.scrollingElement })
-
-    window.example = {
-      provider, ydocument, type, binding
-    }
-  </script>
-</body>
-</html>

examples/dom.js

@@ -1,13 +0,0 @@
-import * as Y from '../src/index.js'
-import { WebsocketProvider } from 'y-websocket'
-import { DomBinding } from 'y-dom'
-import * as conf from './exampleConfig.js'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('dom')
-const type = ydocument.define('xml', Y.XmlFragment)
-const binding = new DomBinding(type, document.querySelector('#content'), { scrollingElement: document.scrollingElement })
-
-window.example = {
-  provider, ydocument, type, binding
-}

examples/exampleConfig.js

@@ -1,9 +0,0 @@
-/* eslint-env browser */
-
-const isDeployed = location.hostname === 'yjs.website'
-
-if (!isDeployed) {
-  console.log('%cYjs: Start your local websocket server by running %c`npm run websocket-server`', 'color:blue', 'color: grey; font-weight: bold')
-}
-
-export const serverAddress = isDeployed ? 'wss://api.yjs.website' : 'ws://localhost:1234'

examples/examples.json

@@ -1,17 +0,0 @@
-{
-  "codemirror": {
-    "title": "CodeMirror Binding"
-  },
-  "prosemirror": {
-    "title": "ProseMirror Binding"
-  },
-  "textarea": {
-    "title": "Textarea Binding"
-  },
-  "quill": {
-    "title": "Quill Binding"
-  },
-  "dom": {
-    "title": "Dom Binding"
-  }
-}

examples/prosemirror-history.js

@@ -1,159 +0,0 @@
-
-import { Plugin } from 'prosemirror-state'
-import crel from 'crel'
-import * as Y from '../src/index.js'
-import { prosemirrorPluginKey } from 'y-prosemirror'
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-import * as historyProtocol from 'y-protocols/history.js'
-
-const niceColors = ['#3cb44b', '#4363d8', '#f58231', '#911eb4', '#46f0f0', '#f032e6', '#bcf60c', '#008080', '#9a6324', '#800000', '#808000', '#000075', '#808080']
-
-const createUserCSS = (userid, username, color = 'rgb(250, 129, 0)', color2 = 'rgba(250, 129, 0, .41)') => `
-  [ychange_state][ychange_user="${userid}"]:hover::before {
-    content: "${username}" !important;
-    background-color: ${color} !important;
-  }
-  [ychange_state="added"][ychange_user="${userid}"] {
-    background-color: ${color2} !important;
-  }
-  [ychange_state="removed"][ychange_user="${userid}"] {
-    color: ${color} !important;
-  }
-`
-
-export const noteHistoryPlugin = new Plugin({
-  state: {
-    init (initargs, state) {
-      return new NoteHistoryPlugin()
-    },
-    apply (tr, pluginState) {
-      return pluginState
-    }
-  },
-  view (editorView) {
-    const hstate = noteHistoryPlugin.getState(editorView.state)
-    hstate.init(editorView)
-    return {
-      destroy: hstate.destroy.bind(hstate)
-    }
-  }
-})
-
-const createWrapper = () => {
-  const wrapper = crel('div', { style: 'display: flex;' })
-  const historyContainer = crel('div', { style: 'align-self: baseline; flex-basis: 250px;', class: 'shared-history' })
-  wrapper.insertBefore(historyContainer, null)
-  const userStyleContainer = crel('style')
-  wrapper.insertBefore(userStyleContainer, null)
-  return { wrapper, historyContainer, userStyleContainer }
-}
-
-class NoteHistoryPlugin {
-  init (editorView) {
-    this.editorView = editorView
-    const { historyContainer, wrapper, userStyleContainer } = createWrapper()
-    this.userStyleContainer = userStyleContainer
-    this.wrapper = wrapper
-    this.historyContainer = historyContainer
-    const n = editorView.dom.parentNode.parentNode
-    n.parentNode.replaceChild(this.wrapper, n)
-    n.style['flex-grow'] = '1'
-    wrapper.insertBefore(n, this.wrapper.firstChild)
-    this.render()
-    const y = prosemirrorPluginKey.getState(this.editorView.state).y
-    const history = y.define('history', Y.Array)
-    history.observe(this.render.bind(this))
-  }
-  destroy () {
-    this.wrapper.parentNode.replaceChild(this.wrapper.firstChild, this.wrapper)
-    const y = prosemirrorPluginKey.getState(this.editorView.state).y
-    const history = y.define('history', Y.Array)
-    history.unobserve(this.render)
-  }
-  render () {
-    const y = prosemirrorPluginKey.getState(this.editorView.state).y
-    const history = y.define('history', Y.Array).toArray()
-    const fragment = document.createDocumentFragment()
-    const snapshotBtn = crel('button', { type: 'button' }, ['snapshot'])
-    fragment.insertBefore(snapshotBtn, null)
-    let _prevSnap = null // empty
-    snapshotBtn.addEventListener('click', () => {
-      const awareness = y.getAwarenessInfo()
-      const userMap = new Map()
-      const aw = y.getLocalAwarenessInfo()
-      userMap.set(y.userID, aw.name || 'unknown')
-      awareness.forEach((a, userID) => {
-        userMap.set(userID, a.name || 'Unknown')
-      })
-      this.snapshot(userMap)
-    })
-    history.forEach(buf => {
-      const decoder = decoding.createDecoder(buf)
-      const snapshot = historyProtocol.readHistorySnapshot(decoder)
-      const date = new Date(decoding.readUint32(decoder) * 1000)
-      const restoreBtn = crel('button', { type: 'button' }, ['restore'])
-      const a = crel('a', [
-        '• ' + date.toUTCString(), restoreBtn
-      ])
-      const el = crel('div', [ a ])
-      let prevSnapshot = _prevSnap // rebind to new variable
-      restoreBtn.addEventListener('click', event => {
-        if (prevSnapshot === null) {
-          prevSnapshot = { ds: snapshot.ds, sm: new Map() }
-        }
-        this.editorView.dispatch(this.editorView.state.tr.setMeta(prosemirrorPluginKey, { snapshot, prevSnapshot, restore: true }))
-        event.stopPropagation()
-      })
-      a.addEventListener('click', () => {
-        console.log('setting snapshot')
-        if (prevSnapshot === null) {
-          prevSnapshot = { ds: snapshot.ds, sm: new Map() }
-        }
-        this.renderSnapshot(snapshot, prevSnapshot)
-      })
-      fragment.insertBefore(el, null)
-      _prevSnap = snapshot
-    })
-    this.historyContainer.innerHTML = ''
-    this.historyContainer.insertBefore(fragment, null)
-  }
-  renderSnapshot (snapshot, prevSnapshot) {
-    this.editorView.dispatch(this.editorView.state.tr.setMeta(prosemirrorPluginKey, { snapshot, prevSnapshot }))
-    /**
-     * @type {Array<string|null>}
-     */
-    let colors = niceColors.slice()
-    let style = ''
-    snapshot.userMap.forEach((name, userid) => {
-      /**
-       * @type {any}
-       */
-      const randInt = name.split('').map(s => s.charCodeAt(0)).reduce((a, b) => a + b)
-      let color = null
-      let i = 0
-      for (; i < colors.length && color === null; i++) {
-        color = colors[(randInt + i) % colors.length]
-      }
-      if (color === null) {
-        colors = niceColors.slice()
-        i = 0
-        color = colors[randInt % colors.length]
-      }
-      colors[randInt % colors.length] = null
-      style += createUserCSS(userid, name, color, color + '69')
-    })
-    this.userStyleContainer.innerHTML = style
-  }
-  /**
-   * @param {Map<number, string>} [updatedUserMap] Maps from userid (yjs model) to account name (e.g. mail address)
-   */
-  snapshot (updatedUserMap = new Map()) {
-    const y = prosemirrorPluginKey.getState(this.editorView.state).y
-    const history = y.define('history', Y.Array)
-    const encoder = encoding.createEncoder()
-    historyProtocol.writeHistorySnapshot(encoder, y, updatedUserMap)
-    encoding.writeUint32(encoder, Math.floor(Date.now() / 1000))
-    history.push([encoding.toBuffer(encoder)])
-  }
-}

examples/prosemirror-schema.js

@@ -1,197 +0,0 @@
-import { Schema } from 'prosemirror-model'
-
-const brDOM = ['br']
-
-const calcYchangeDomAttrs = (attrs, domAttrs = {}) => {
-  domAttrs = Object.assign({}, domAttrs)
-  if (attrs.ychange !== null) {
-    domAttrs.ychange_user = attrs.ychange.user
-    domAttrs.ychange_state = attrs.ychange.state
-  }
-  return domAttrs
-}
-
-// :: Object
-// [Specs](#model.NodeSpec) for the nodes defined in this schema.
-export const nodes = {
-  // :: NodeSpec The top level document node.
-  doc: {
-    content: 'block+'
-  },
-
-  // :: NodeSpec A plain paragraph textblock. Represented in the DOM
-  // as a `<p>` element.
-  paragraph: {
-    attrs: { ychange: { default: null } },
-    content: 'inline*',
-    group: 'block',
-    parseDOM: [{ tag: 'p' }],
-    toDOM (node) { return ['p', calcYchangeDomAttrs(node.attrs), 0] }
-  },
-
-  // :: NodeSpec A blockquote (`<blockquote>`) wrapping one or more blocks.
-  blockquote: {
-    attrs: { ychange: { default: null } },
-    content: 'block+',
-    group: 'block',
-    defining: true,
-    parseDOM: [{ tag: 'blockquote' }],
-    toDOM (node) { return ['blockquote', calcYchangeDomAttrs(node.attrs), 0] }
-  },
-
-  // :: NodeSpec A horizontal rule (`<hr>`).
-  horizontal_rule: {
-    attrs: { ychange: { default: null } },
-    group: 'block',
-    parseDOM: [{ tag: 'hr' }],
-    toDOM (node) {
-      return ['hr', calcYchangeDomAttrs(node.attrs)]
-    }
-  },
-
-  // :: NodeSpec A heading textblock, with a `level` attribute that
-  // should hold the number 1 to 6. Parsed and serialized as `<h1>` to
-  // `<h6>` elements.
-  heading: {
-    attrs: {
-      level: { default: 1 },
-      ychange: { default: null }
-    },
-    content: 'inline*',
-    group: 'block',
-    defining: true,
-    parseDOM: [{ tag: 'h1', attrs: { level: 1 } },
-      { tag: 'h2', attrs: { level: 2 } },
-      { tag: 'h3', attrs: { level: 3 } },
-      { tag: 'h4', attrs: { level: 4 } },
-      { tag: 'h5', attrs: { level: 5 } },
-      { tag: 'h6', attrs: { level: 6 } }],
-    toDOM (node) { return ['h' + node.attrs.level, calcYchangeDomAttrs(node.attrs), 0] }
-  },
-
-  // :: NodeSpec A code listing. Disallows marks or non-text inline
-  // nodes by default. Represented as a `<pre>` element with a
-  // `<code>` element inside of it.
-  code_block: {
-    attrs: { ychange: { default: null } },
-    content: 'text*',
-    marks: '',
-    group: 'block',
-    code: true,
-    defining: true,
-    parseDOM: [{ tag: 'pre', preserveWhitespace: 'full' }],
-    toDOM (node) { return ['pre', calcYchangeDomAttrs(node.attrs), ['code', 0]] }
-  },
-
-  // :: NodeSpec The text node.
-  text: {
-    group: 'inline'
-  },
-
-  // :: NodeSpec An inline image (`<img>`) node. Supports `src`,
-  // `alt`, and `href` attributes. The latter two default to the empty
-  // string.
-  image: {
-    inline: true,
-    attrs: {
-      ychange: { default: null },
-      src: {},
-      alt: { default: null },
-      title: { default: null }
-    },
-    group: 'inline',
-    draggable: true,
-    parseDOM: [{ tag: 'img[src]',
-      getAttrs (dom) {
-        return {
-          src: dom.getAttribute('src'),
-          title: dom.getAttribute('title'),
-          alt: dom.getAttribute('alt')
-        }
-      } }],
-    toDOM (node) {
-      const domAttrs = {
-        src: node.attrs.src,
-        title: node.attrs.title,
-        alt: node.attrs.alt
-      }
-      return ['img', calcYchangeDomAttrs(node.attrs, domAttrs)]
-    }
-  },
-
-  // :: NodeSpec A hard line break, represented in the DOM as `<br>`.
-  hard_break: {
-    inline: true,
-    group: 'inline',
-    selectable: false,
-    parseDOM: [{ tag: 'br' }],
-    toDOM () { return brDOM }
-  }
-}
-
-const emDOM = ['em', 0]; const strongDOM = ['strong', 0]; const codeDOM = ['code', 0]
-
-// :: Object [Specs](#model.MarkSpec) for the marks in the schema.
-export const marks = {
-  // :: MarkSpec A link. Has `href` and `title` attributes. `title`
-  // defaults to the empty string. Rendered and parsed as an `<a>`
-  // element.
-  link: {
-    attrs: {
-      href: {},
-      title: { default: null }
-    },
-    inclusive: false,
-    parseDOM: [{ tag: 'a[href]',
-      getAttrs (dom) {
-        return { href: dom.getAttribute('href'), title: dom.getAttribute('title') }
-      } }],
-    toDOM (node) { return ['a', node.attrs, 0] }
-  },
-
-  // :: MarkSpec An emphasis mark. Rendered as an `<em>` element.
-  // Has parse rules that also match `<i>` and `font-style: italic`.
-  em: {
-    parseDOM: [{ tag: 'i' }, { tag: 'em' }, { style: 'font-style=italic' }],
-    toDOM () { return emDOM }
-  },
-
-  // :: MarkSpec A strong mark. Rendered as `<strong>`, parse rules
-  // also match `<b>` and `font-weight: bold`.
-  strong: {
-    parseDOM: [{ tag: 'strong' },
-      // This works around a Google Docs misbehavior where
-      // pasted content will be inexplicably wrapped in `<b>`
-      // tags with a font-weight normal.
-      { tag: 'b', getAttrs: node => node.style.fontWeight !== 'normal' && null },
-      { style: 'font-weight', getAttrs: value => /^(bold(er)?|[5-9]\d{2,})$/.test(value) && null }],
-    toDOM () { return strongDOM }
-  },
-
-  // :: MarkSpec Code font mark. Represented as a `<code>` element.
-  code: {
-    parseDOM: [{ tag: 'code' }],
-    toDOM () { return codeDOM }
-  },
-  ychange: {
-    attrs: {
-      user: { default: null },
-      state: { default: null }
-    },
-    inclusive: false,
-    parseDOM: [{ tag: 'ychange' }],
-    toDOM (node) {
-      return ['ychange', { ychange_user: node.attrs.user, ychange_state: node.attrs.state }, 0]
-    }
-  }
-}
-
-// :: Schema
-// This schema rougly corresponds to the document schema used by
-// [CommonMark](http://commonmark.org/), minus the list elements,
-// which are defined in the [`prosemirror-schema-list`](#schema-list)
-// module.
-//
-// To reuse elements from this schema, extend or read from its
-// `spec.nodes` and `spec.marks` [properties](#model.Schema.spec).
-export const schema = new Schema({ nodes, marks })

examples/prosemirror.css

@@ -1,330 +0,0 @@
-.ProseMirror {
-  position: relative;
-}
-
-.ProseMirror {
-  word-wrap: break-word;
-  white-space: pre-wrap;
-  -webkit-font-variant-ligatures: none;
-  font-variant-ligatures: none;
-}
-
-.ProseMirror pre {
-  white-space: pre-wrap;
-}
-
-.ProseMirror li {
-  position: relative;
-}
-
-.ProseMirror-hideselection *::selection { background: transparent; }
-.ProseMirror-hideselection *::-moz-selection { background: transparent; }
-.ProseMirror-hideselection { caret-color: transparent; }
-
-.ProseMirror-selectednode {
-  outline: 2px solid #8cf;
-}
-
-/* Make sure li selections wrap around markers */
-
-li.ProseMirror-selectednode {
-  outline: none;
-}
-
-li.ProseMirror-selectednode:after {
-  content: "";
-  position: absolute;
-  left: -32px;
-  right: -2px; top: -2px; bottom: -2px;
-  border: 2px solid #8cf;
-  pointer-events: none;
-}
-.ProseMirror-textblock-dropdown {
-  min-width: 3em;
-}
-
-.ProseMirror-menu {
-  margin: 0 -4px;
-  line-height: 1;
-}
-
-.ProseMirror-tooltip .ProseMirror-menu {
-  width: -webkit-fit-content;
-  width: fit-content;
-  white-space: pre;
-}
-
-.ProseMirror-menuitem {
-  margin-right: 3px;
-  display: inline-block;
-}
-
-.ProseMirror-menuseparator {
-  border-right: 1px solid #ddd;
-  margin-right: 3px;
-}
-
-.ProseMirror-menu-dropdown, .ProseMirror-menu-dropdown-menu {
-  font-size: 90%;
-  white-space: nowrap;
-}
-
-.ProseMirror-menu-dropdown {
-  vertical-align: 1px;
-  cursor: pointer;
-  position: relative;
-  padding-right: 15px;
-}
-
-.ProseMirror-menu-dropdown-wrap {
-  padding: 1px 0 1px 4px;
-  display: inline-block;
-  position: relative;
-}
-
-.ProseMirror-menu-dropdown:after {
-  content: "";
-  border-left: 4px solid transparent;
-  border-right: 4px solid transparent;
-  border-top: 4px solid currentColor;
-  opacity: .6;
-  position: absolute;
-  right: 4px;
-  top: calc(50% - 2px);
-}
-
-.ProseMirror-menu-dropdown-menu, .ProseMirror-menu-submenu {
-  position: absolute;
-  background: white;
-  color: #666;
-  border: 1px solid #aaa;
-  padding: 2px;
-}
-
-.ProseMirror-menu-dropdown-menu {
-  z-index: 15;
-  min-width: 6em;
-}
-
-.ProseMirror-menu-dropdown-item {
-  cursor: pointer;
-  padding: 2px 8px 2px 4px;
-}
-
-.ProseMirror-menu-dropdown-item:hover {
-  background: #f2f2f2;
-}
-
-.ProseMirror-menu-submenu-wrap {
-  position: relative;
-  margin-right: -4px;
-}
-
-.ProseMirror-menu-submenu-label:after {
-  content: "";
-  border-top: 4px solid transparent;
-  border-bottom: 4px solid transparent;
-  border-left: 4px solid currentColor;
-  opacity: .6;
-  position: absolute;
-  right: 4px;
-  top: calc(50% - 4px);
-}
-
-.ProseMirror-menu-submenu {
-  display: none;
-  min-width: 4em;
-  left: 100%;
-  top: -3px;
-}
-
-.ProseMirror-menu-active {
-  background: #eee;
-  border-radius: 4px;
-}
-
-.ProseMirror-menu-active {
-  background: #eee;
-  border-radius: 4px;
-}
-
-.ProseMirror-menu-disabled {
-  opacity: .3;
-}
-
-.ProseMirror-menu-submenu-wrap:hover .ProseMirror-menu-submenu, .ProseMirror-menu-submenu-wrap-active .ProseMirror-menu-submenu {
-  display: block;
-}
-
-.ProseMirror-menubar {
-  border-top-left-radius: inherit;
-  border-top-right-radius: inherit;
-  position: relative;
-  min-height: 1em;
-  color: #666;
-  padding: 1px 6px;
-  top: 0; left: 0; right: 0;
-  border-bottom: 1px solid silver;
-  background: white;
-  z-index: 10;
-  -moz-box-sizing: border-box;
-  box-sizing: border-box;
-  overflow: visible;
-}
-
-.ProseMirror-icon {
-  display: inline-block;
-  line-height: .8;
-  vertical-align: -2px; /* Compensate for padding */
-  padding: 2px 8px;
-  cursor: pointer;
-}
-
-.ProseMirror-menu-disabled.ProseMirror-icon {
-  cursor: default;
-}
-
-.ProseMirror-icon svg {
-  fill: currentColor;
-  height: 1em;
-}
-
-.ProseMirror-icon span {
-  vertical-align: text-top;
-}
-.ProseMirror-gapcursor {
-  display: none;
-  pointer-events: none;
-  position: absolute;
-}
-
-.ProseMirror-gapcursor:after {
-  content: "";
-  display: block;
-  position: absolute;
-  top: -2px;
-  width: 20px;
-  border-top: 1px solid black;
-  animation: ProseMirror-cursor-blink 1.1s steps(2, start) infinite;
-}
-
-@keyframes ProseMirror-cursor-blink {
-  to {
-    visibility: hidden;
-  }
-}
-
-.ProseMirror-focused .ProseMirror-gapcursor {
-  display: block;
-}
-/* Add space around the hr to make clicking it easier */
-
-.ProseMirror-example-setup-style hr {
-  padding: 2px 10px;
-  border: none;
-  margin: 1em 0;
-}
-
-.ProseMirror-example-setup-style hr:after {
-  content: "";
-  display: block;
-  height: 1px;
-  background-color: silver;
-  line-height: 2px;
-}
-
-.ProseMirror ul, .ProseMirror ol {
-  padding-left: 30px;
-}
-
-.ProseMirror blockquote {
-  padding-left: 1em;
-  border-left: 3px solid #eee;
-  margin-left: 0; margin-right: 0;
-}
-
-.ProseMirror-example-setup-style img {
-  cursor: default;
-}
-
-.ProseMirror-prompt {
-  background: white;
-  padding: 5px 10px 5px 15px;
-  border: 1px solid silver;
-  position: fixed;
-  border-radius: 3px;
-  z-index: 11;
-  box-shadow: -.5px 2px 5px rgba(0, 0, 0, .2);
-}
-
-.ProseMirror-prompt h5 {
-  margin: 0;
-  font-weight: normal;
-  font-size: 100%;
-  color: #444;
-}
-
-.ProseMirror-prompt input[type="text"],
-.ProseMirror-prompt textarea {
-  background: #eee;
-  border: none;
-  outline: none;
-}
-
-.ProseMirror-prompt input[type="text"] {
-  padding: 0 4px;
-}
-
-.ProseMirror-prompt-close {
-  position: absolute;
-  left: 2px; top: 1px;
-  color: #666;
-  border: none; background: transparent; padding: 0;
-}
-
-.ProseMirror-prompt-close:after {
-  content: "✕";
-  font-size: 12px;
-}
-
-.ProseMirror-invalid {
-  background: #ffc;
-  border: 1px solid #cc7;
-  border-radius: 4px;
-  padding: 5px 10px;
-  position: absolute;
-  min-width: 10em;
-}
-
-.ProseMirror-prompt-buttons {
-  margin-top: 5px;
-  display: none;
-}
-#editor, .editor {
-  background: white;
-  color: black;
-  background-clip: padding-box;
-  border-radius: 4px;
-  border: 2px solid rgba(0, 0, 0, 0.2);
-  padding: 5px 0;
-  margin-bottom: 23px;
-}
-
-.ProseMirror p:first-child,
-.ProseMirror h1:first-child,
-.ProseMirror h2:first-child,
-.ProseMirror h3:first-child,
-.ProseMirror h4:first-child,
-.ProseMirror h5:first-child,
-.ProseMirror h6:first-child {
-  margin-top: 10px;
-}
-
-.ProseMirror {
-  padding: 4px 8px 4px 14px;
-  line-height: 1.2;
-  outline: none;
-}
-
-.ProseMirror p { margin-bottom: 1em }
-

examples/prosemirror.html

@@ -1,123 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <title>Yjs Prosemirror Example</title>
-    <link rel=stylesheet href="./prosemirror.css">
-    <style>
-      placeholder {
-        display: inline;
-        border: 1px solid #ccc;
-        color: #ccc;
-      }
-      placeholder:after {
-        content: "☁";
-        font-size: 200%;
-        line-height: 0.1;
-        font-weight: bold;
-      }
-      .ProseMirror img { max-width: 100px }
-      /* this is a rough fix for the first cursor position when the first paragraph is empty */
-      .ProseMirror > .ProseMirror-yjs-cursor:first-child {
-        margin-top: 16px;
-      }
-      .ProseMirror p:first-child, .ProseMirror h1:first-child, .ProseMirror h2:first-child, .ProseMirror h3:first-child, .ProseMirror h4:first-child, .ProseMirror h5:first-child, .ProseMirror h6:first-child {
-        margin-top: 16px
-      }
-      .ProseMirror-yjs-cursor {
-        position: absolute;
-        border-left: black;
-        border-left-style: solid;
-        border-left-width: 2px;
-        border-color: orange;
-        height: 1em;
-        word-break: normal;
-      }
-      .ProseMirror-yjs-cursor > div {
-        position: relative;
-        top: -1.05em;
-        font-size: 13px;
-        background-color: rgb(250, 129, 0);
-        font-family: serif;
-        font-style: normal;
-        font-weight: normal;
-        line-height: normal;
-        user-select: none;
-        color: white;
-        padding-left: 2px;
-        padding-right: 2px;
-      }
-      [ychange_state] {
-        position: relative;
-      }
-      [ychange_state]:hover::before {
-        content: attr(ychange_user);
-        background-color: #fa8100;
-        position: absolute;
-        top: -14px;
-        right: 0;
-        font-size: 12px;
-        padding: 0 2px;
-        border-radius: 3px 3px 0 0;
-        color: #fdfdfe;
-        user-select: none;
-        word-break: normal;
-      }
-      *[ychange_state='added'] {
-        background-color: #fa810069;
-      }
-      ychange[ychange_state='removed'] {
-        color: rgb(250, 129, 0);
-        text-decoration: line-through;
-      }
-      *:not(ychange)[ychange_state='removed'] {
-        background-color: #ff9494c9;
-        text-decoration: line-through;
-      }
-      img[ychange_state='removed'] {
-        padding: 2px;
-      }
-      .y-connect-btn {
-        position: absolute;
-        top: 20px;
-        right: 20px;
-      }
-    </style>
-</head>
-<body>
-  <button type="button" class="y-connect-btn">Disconnect</button>
-  <p>This example shows how to bind a YXmlFragment to a <a href="http://prosemirror.net">Prosemirror</a> editor using <a href="https://github.com/y-js/y-prosemirror">y-prosemirror</a>.</p>
-  <p>The content of this editor is shared with every client that visits this domain.</p>
-  <div class="code-html">
-
-<div id="editor" style="margin-bottom: 23px"></div>
-<div style="display: none" id="content"></div>
-  </div>
-  <!-- The actual source file for the following code is found in ./prosemirror.js. Run `npm run watch` to compile the files -->
-  <script class="code-js" src="./build/prosemirror.js" type="module">
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'yjs/provider/websocket.js'
-import { prosemirrorPlugin, cursorPlugin } from 'yjs/bindings/prosemirror'
-
-import * as conf from './exampleConfig.js'
-
-import { EditorState } from 'prosemirror-state'
-import { EditorView } from 'prosemirror-view'
-import { DOMParser } from 'prosemirror-model'
-import { schema } from 'prosemirror-schema-basic'
-import { exampleSetup } from 'prosemirror-example-setup'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('prosemirror')
-const type = ydocument.define('prosemirror', Y.XmlFragment)
-
-const prosemirrorView = new EditorView(document.querySelector('#editor'), {
-  state: EditorState.create({
-    doc: DOMParser.fromSchema(schema).parse(document.querySelector('#content')),
-    plugins: exampleSetup({schema}).concat([prosemirrorPlugin(type), cursorPlugin])
-  })
-})
-
-window.example = { provider, ydocument, type, prosemirrorView }
-  </script>
-</body>
-</html>

examples/prosemirror.js

@@ -1,36 +0,0 @@
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'y-websocket'
-import { prosemirrorPlugin, cursorPlugin } from 'y-prosemirror'
-
-import * as conf from './exampleConfig.js'
-
-import { EditorState } from 'prosemirror-state'
-import { EditorView } from 'prosemirror-view'
-import { DOMParser } from 'prosemirror-model'
-import { schema } from './prosemirror-schema.js'
-import { exampleSetup } from 'prosemirror-example-setup'
-// import { noteHistoryPlugin } from './prosemirror-history.js'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('prosemirror' /*, { gc: false } */)
-const type = ydocument.get('prosemirror', Y.XmlFragment)
-
-const prosemirrorView = new EditorView(document.querySelector('#editor'), {
-  state: EditorState.create({
-    doc: DOMParser.fromSchema(schema).parse(document.querySelector('#content')),
-    plugins: exampleSetup({ schema }).concat([prosemirrorPlugin(type), cursorPlugin])
-  })
-})
-
-const connectBtn = document.querySelector('.y-connect-btn')
-connectBtn.addEventListener('click', () => {
-  if (ydocument.wsconnected) {
-    ydocument.disconnect()
-    connectBtn.textContent = 'Connect'
-  } else {
-    ydocument.connect()
-    connectBtn.textContent = 'Disconnect'
-  }
-})
-
-window.example = { provider, ydocument, type, prosemirrorView }

examples/quill.html

@@ -1,51 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <title>Yjs Quill Example</title>
-    <link rel="stylesheet" href="https://cdn.quilljs.com/1.3.6/quill.snow.css">
-  </head>
-<body>
-  <p>This example shows how to bind a YText type to <a href="https://quilljs.com">Quill</a> editor.</p>
-  <p>The content of this editor is shared with every client who visits this domain.</p>
-  <div class="code-html">
-<div id="quill-container">
-  <div id="quill">
-  </div>
-</div>
-  </div>
-  <!-- The actual source file for the following code is found in ./quill.js. Run `npm run watch` to compile the files -->
-  <script class="code-js" src="./build/quill.js" type="module">
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'yjs/provider/websocket.js'
-import { QuillBinding } from 'yjs/bindings/quill.js'
-
-import * as conf from './exampleConfig.js'
-
-import Quill from 'quill'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('quill')
-const ytext = ydocument.define('quill', Y.Text)
-
-const quill = new Quill('#quill-container', {
-  modules: {
-    toolbar: [
-      [{ header: [1, 2, false] }],
-      ['bold', 'italic', 'underline'],
-      ['image', 'code-block'],
-      [{ color: [] }, { background: [] }], // Snow theme fills in values
-      [{ script: 'sub' }, { script: 'super' }],
-      ['link', 'image'],
-      ['link', 'code-block'],
-      [{ list: 'ordered' }, { list: 'bullet' }]
-    ]
-  },
-  placeholder: 'Compose an epic...',
-  theme: 'snow' // or 'bubble'
-})
-
-window.quillBinding = new QuillBinding(ytext, quill)
-
-  </script>
-</body>
-</html>

examples/quill.js

@@ -1,30 +0,0 @@
-import * as Y from '../src/index.js'
-import { WebsocketProvider } from 'y-websocket'
-import { QuillBinding } from 'y-quill'
-
-import * as conf from './exampleConfig.js'
-
-import Quill from 'quill'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('quill')
-const ytext = ydocument.define('quill', Y.Text)
-
-const quill = new Quill('#quill-container', {
-  modules: {
-    toolbar: [
-      [{ header: [1, 2, false] }],
-      ['bold', 'italic', 'underline'],
-      ['image', 'code-block'],
-      [{ color: [] }, { background: [] }], // Snow theme fills in values
-      [{ script: 'sub' }, { script: 'super' }],
-      ['link', 'image'],
-      ['link', 'code-block'],
-      [{ list: 'ordered' }, { list: 'bullet' }]
-    ]
-  },
-  placeholder: 'Compose an epic...',
-  theme: 'snow' // or 'bubble'
-})
-
-window.quillBinding = new QuillBinding(ytext, quill)

examples/style.css

@@ -1,29 +0,0 @@
-footer img {
-  display: none;
-}
-
-nav .title h1 a {
-  display: none;
-}
-
-footer {
-  background-color: #b93c1d;
-}
-
-#resizer {
-  background-color: #b93c1d;
-}
-
-.main section article.readme h1:first-child img {
-  display: none;
-}
-
-.main section article.readme h1:first-child {
-  margin-bottom: 16px;
-  margin-top: 30px;
-}
-
-.main section article.readme h1:first-child::before {
-  content: "Yjs";
-  font-size: 2em;
-}

examples/textarea.html

@@ -1,32 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <title>Yjs Textarea Example</title>
-</head>
-<body>
-  <p>This example shows how to bind a YText type to a DOM Textarea.</p>
-  <p>The content of this textarea is shared with every client who visits this domain.</p>
-  <div class="code-html">
-
-<textarea style="width:80%;" rows=40 autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"></textarea>
-  </div>
-  <!-- The actual source file for the following code is found in ./textarea.js. Run `npm run watch` to compile the files -->
-  <script class="code-js" src="./build/textarea.js" type="module">
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'yjs/provider/websocket.js'
-import { TextareaBinding } from 'yjs/bindings/textarea.js'
-
-import * as conf from './exampleConfig.js'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('textarea')
-const type = ydocument.define('textarea', Y.Text)
-const textarea = document.querySelector('textarea')
-const binding = new TextareaBinding(type, textarea)
-
-window.textareaExample = {
-  provider, ydocument, type, textarea, binding
-}
-  </script>
-</body>
-</html>

examples/textarea.js

@@ -1,14 +0,0 @@
-import { WebsocketProvider } from 'y-websocket'
-import { TextareaBinding } from 'y-textarea'
-
-import * as conf from './exampleConfig.js'
-
-const provider = new WebsocketProvider(conf.serverAddress)
-const ydocument = provider.get('textarea')
-const type = ydocument.getText('textarea')
-const textarea = document.querySelector('textarea')
-const binding = new TextareaBinding(type, textarea)
-
-window.textareaExample = {
-  provider, ydocument, type, textarea, binding
-}

gulpfile.coffee

@@ -0,0 +1,114 @@
+gulp = require('gulp')
+coffee = require('gulp-coffee')
+concat = require('gulp-concat')
+uglify = require 'gulp-uglify'
+sourcemaps = require('gulp-sourcemaps')
+browserify = require('gulp-browserify')
+rename = require 'gulp-rename'
+rimraf = require 'gulp-rimraf'
+gulpif = require 'gulp-if'
+ignore = require 'gulp-ignore'
+git = require 'gulp-git'
+debug = require 'gulp-debug'
+coffeelint = require 'gulp-coffeelint'
+mocha = require 'gulp-mocha'
+run = require 'gulp-run'
+ljs = require 'gulp-ljs'
+plumber = require 'gulp-plumber'
+cache = require 'gulp-cached'
+coffeeify = require 'gulp-coffeeify'
+exit = require 'gulp-exit'
+
+gulp.task 'default', ['build_browser']
+
+files =
+  lib : ['./lib/**/*.coffee']
+  browser : ['./lib/y.coffee','./lib/y-object.coffee']
+  test : ['./test/**/*test.coffee', '../y-*/test/*test.coffee']
+  #test : ['./test/Json_test.coffee', './test/Text_test.coffee']
+  gulp : ['./gulpfile.coffee']
+  examples : ['./examples/**/*.js']
+  other: ['./lib/**/*', './test/*']
+
+files.all = []
+for name,file_list of files
+  if name isnt 'build'
+    files.all = files.all.concat file_list
+
+gulp.task 'deploy_nodejs', ->
+  gulp.src files.lib
+    .pipe sourcemaps.init()
+    .pipe coffee()
+    .pipe sourcemaps.write './'
+    .pipe gulp.dest 'build/node/'
+    .pipe gulpif '!**/', git.add({args : "-A"})
+
+gulp.task 'deploy', ['mocha', 'build_browser', 'deploy_nodejs', 'lint', 'codo']
+
+gulp.task 'build_browser', ->
+  gulp.src files.browser, { read: false }
+    .pipe plumber()
+    .pipe browserify
+      transform: ['coffeeify']
+      extensions: ['.coffee']
+      debug : true
+    .pipe rename
+      extname: ".js"
+    .pipe gulp.dest './build/browser/'
+    .pipe uglify()
+    .pipe gulp.dest '.'
+
+  gulp.src files.test, {read: false}
+    .pipe plumber()
+    .pipe browserify
+      transform: ['coffeeify']
+      extensions: ['.coffee']
+      debug: true
+    .pipe rename
+      extname: ".js"
+      dirname: "./"
+    .pipe gulp.dest './build/test/'
+
+gulp.task 'build_node', ->
+  gulp.src files.lib
+    .pipe plumber()
+    .pipe coffee({bare:true})
+    .pipe gulp.dest './build/node'
+
+gulp.task 'build', ['build_node', 'build_browser'], ->
+
+gulp.task 'watch', ['build'], ->
+  gulp.watch files.all, ['build']
+
+gulp.task 'mocha', ->
+  gulp.src files.test, { read: false }
+    .pipe mocha {reporter : 'list'}
+    .pipe exit()
+
+gulp.task 'lint', ->
+  gulp.src files.all
+    .pipe ignore.include '**/*.coffee'
+    .pipe coffeelint {
+      "max_line_length":
+        "level": "ignore"
+      }
+    .pipe coffeelint.reporter()
+
+gulp.task 'literate', ->
+  gulp.src files.examples
+    .pipe ljs { code : true }
+    .pipe rename
+      basename : "README"
+      extname : ".md"
+    .pipe gulp.dest 'examples/'
+    .pipe gulpif '!**/', git.add({args : "-A"})
+
+gulp.task 'codo', [], ()->
+  command = './node_modules/codo/bin/codo -o "./doc" --name "yjs" --readme "README.md" --undocumented false --private true --title "yjs API" ./lib - LICENSE.txt '
+  run(command).exec()
+
+gulp.task 'clean', ->
+  gulp.src ['./build/{browser,test,node}/**/*.{js,map}','./doc/'], { read: false }
+    .pipe rimraf()
+
+gulp.task 'default', ['clean','build'], ->

lib/ConnectorAdapter.coffee

@@ -0,0 +1,61 @@
+
+ConnectorClass = require "./ConnectorClass"
+#
+# @param {Engine} engine The transformation engine
+# @param {HistoryBuffer} HB
+# @param {Array<Function>} execution_listener You must ensure that whenever an operation is executed, every function in this Array is called.
+#
+adaptConnector = (connector, engine, HB, execution_listener)->
+
+  for name, f of ConnectorClass
+    connector[name] = f
+
+  # For the XMPPConnector: lets send it as an array
+  # therefore, we have to restructure it later
+  encode_state_vector = (v)->
+    for name,value of v
+      user: name
+      state: value
+  parse_state_vector = (v)->
+    state_vector = {}
+    for s in v
+      state_vector[s.user] = s.state
+    state_vector
+
+  getStateVector = ()->
+    encode_state_vector HB.getOperationCounter()
+
+  getHB = (v)->
+    state_vector = parse_state_vector v
+    hb = HB._encode state_vector
+    json =
+      hb: hb
+      state_vector: encode_state_vector HB.getOperationCounter()
+    json
+
+  applyHB = (hb, fromHB)->
+    engine.applyOp hb, fromHB
+
+  connector.getStateVector = getStateVector
+  connector.getHB = getHB
+  connector.applyHB = applyHB
+
+  connector.receive_handlers ?= []
+  connector.receive_handlers.push (sender, op)->
+    if op.uid.creator isnt HB.getUserId()
+      engine.applyOp op
+
+  connector.setIsBoundToY()
+
+  send_ = (o)->
+    if (o.uid.creator is HB.getUserId()) and
+        (typeof o.uid.op_number isnt "string") and # TODO: i don't think that we need this anymore..
+        (HB.getUserId() isnt "_temp")
+      connector.broadcast o
+
+  if connector.invokeSync?
+    HB.setInvokeSyncHandler connector.invokeSync
+
+  execution_listener.push send_
+
+module.exports = adaptConnector

lib/ConnectorClass.coffee

@@ -0,0 +1,355 @@
+
+module.exports =
+  #
+  # @params new Connector(options)
+  #   @param options.syncMethod {String}  is either "syncAll" or "master-slave".
+  #   @param options.role {String} The role of this client
+  #            (slave or master (only used when syncMethod is master-slave))
+  #   @param options.perform_send_again {Boolean} Whetehr to whether to resend the HB after some time period. This reduces sync errors, but has some overhead (optional)
+  #
+  init: (options)->
+    req = (name, choices)=>
+      if options[name]?
+        if (not choices?) or choices.some((c)->c is options[name])
+          @[name] = options[name]
+        else
+          throw new Error "You can set the '"+name+"' option to one of the following choices: "+JSON.encode(choices)
+      else
+        throw new Error "You must specify "+name+", when initializing the Connector!"
+
+    req "syncMethod", ["syncAll", "master-slave"]
+    req "role", ["master", "slave"]
+    req "user_id"
+    @on_user_id_set?(@user_id)
+
+    # whether to resend the HB after some time period. This reduces sync errors.
+    # But this is not necessary in the test-connector
+    if options.perform_send_again?
+      @perform_send_again = options.perform_send_again
+    else
+      @perform_send_again = true
+
+    # A Master should sync with everyone! TODO: really? - for now its safer this way!
+    if @role is "master"
+      @syncMethod = "syncAll"
+
+    # is set to true when this is synced with all other connections
+    @is_synced = false
+    # Peerjs Connections: key: conn-id, value: object
+    @connections = {}
+    # List of functions that shall process incoming data
+    @receive_handlers ?= []
+
+    # whether this instance is bound to any y instance
+    @connections = {}
+    @current_sync_target = null
+    @sent_hb_to_all_users = false
+    @is_initialized = true
+
+  onUserEvent: (f)->
+    @connections_listeners ?= []
+    @connections_listeners.push f
+
+  isRoleMaster: ->
+    @role is "master"
+
+  isRoleSlave: ->
+    @role is "slave"
+
+  findNewSyncTarget: ()->
+    @current_sync_target = null
+    if @syncMethod is "syncAll"
+      for user, c of @connections
+        if not c.is_synced
+          @performSync user
+          break
+    if not @current_sync_target?
+      @setStateSynced()
+    null
+
+  userLeft: (user)->
+    delete @connections[user]
+    @findNewSyncTarget()
+    if @connections_listeners?
+      for f in @connections_listeners
+        f {
+          action: "userLeft"
+          user: user
+        }
+
+
+  userJoined: (user, role)->
+    if not role?
+      throw new Error "Internal: You must specify the role of the joined user! E.g. userJoined('uid:3939','slave')"
+    # a user joined the room
+    @connections[user] ?= {}
+    @connections[user].is_synced = false
+
+    if (not @is_synced) or @syncMethod is "syncAll"
+      if @syncMethod is "syncAll"
+        @performSync user
+      else if role is "master"
+        # TODO: What if there are two masters? Prevent sending everything two times!
+        @performSyncWithMaster user
+
+    if @connections_listeners?
+      for f in @connections_listeners
+        f {
+          action: "userJoined"
+          user: user
+          role: role
+        }
+
+  #
+  # Execute a function _when_ we are connected. If not connected, wait until connected.
+  # @param f {Function} Will be executed on the Connector context.
+  #
+  whenSynced: (args)->
+    if args.constructor is Function
+      args = [args]
+    if @is_synced
+      args[0].apply this, args[1..]
+    else
+      @compute_when_synced ?= []
+      @compute_when_synced.push args
+
+  #
+  # Execute an function when a message is received.
+  # @param f {Function} Will be executed on the PeerJs-Connector context. f will be called with (sender_id, broadcast {true|false}, message).
+  #
+  onReceive: (f)->
+    @receive_handlers.push f
+
+  ###
+  # Broadcast a message to all connected peers.
+  # @param message {Object} The message to broadcast.
+  #
+  broadcast: (message)->
+    throw new Error "You must implement broadcast!"
+
+  #
+  # Send a message to a peer, or set of peers
+  #
+  send: (peer_s, message)->
+    throw new Error "You must implement send!"
+  ###
+
+  #
+  # perform a sync with a specific user.
+  #
+  performSync: (user)->
+    if not @current_sync_target?
+      @current_sync_target = user
+      @send user,
+        sync_step: "getHB"
+        send_again: "true"
+        data: @getStateVector()
+      if not @sent_hb_to_all_users
+        @sent_hb_to_all_users = true
+
+        hb = @getHB([]).hb
+        _hb = []
+        for o in hb
+          _hb.push o
+          if _hb.length > 10
+            @broadcast
+              sync_step: "applyHB_"
+              data: _hb
+            _hb = []
+        @broadcast
+          sync_step: "applyHB"
+          data: _hb
+
+
+
+  #
+  # When a master node joined the room, perform this sync with him. It will ask the master for the HB,
+  # and will broadcast his own HB
+  #
+  performSyncWithMaster: (user)->
+    @current_sync_target = user
+    @send user,
+      sync_step: "getHB"
+      send_again: "true"
+      data: @getStateVector()
+    hb = @getHB([]).hb
+    _hb = []
+    for o in hb
+      _hb.push o
+      if _hb.length > 10
+        @broadcast
+          sync_step: "applyHB_"
+          data: _hb
+        _hb = []
+    @broadcast
+      sync_step: "applyHB"
+      data: _hb
+
+  #
+  # You are sure that all clients are synced, call this function.
+  #
+  setStateSynced: ()->
+    if not @is_synced
+      @is_synced = true
+      if @compute_when_synced?
+        for el in @compute_when_synced
+          f = el[0]
+          args = el[1..]
+          f.apply(args)
+        delete @compute_when_synced
+      null
+
+  # executed when the a state_vector is received. listener will be called only once!
+  whenReceivedStateVector: (f)->
+    @when_received_state_vector_listeners ?= []
+    @when_received_state_vector_listeners.push f
+
+
+  #
+  # You received a raw message, and you know that it is intended for to Yjs. Then call this function.
+  #
+  receiveMessage: (sender, res)->
+    if not res.sync_step?
+      for f in @receive_handlers
+        f sender, res
+    else
+      if sender is @user_id
+        return
+      if res.sync_step is "getHB"
+        # call listeners
+        if @when_received_state_vector_listeners?
+          for f in @when_received_state_vector_listeners
+            f.call this, res.data
+        delete @when_received_state_vector_listeners
+
+        data = @getHB(res.data)
+        hb = data.hb
+        _hb = []
+        # always broadcast, when not synced.
+        # This reduces errors, when the clients goes offline prematurely.
+        # When this client only syncs to one other clients, but looses connectors,
+        # before syncing to the other clients, the online clients have different states.
+        # Since we do not want to perform regular syncs, this is a good alternative
+        if @is_synced
+          sendApplyHB = (m)=>
+            @send sender, m
+        else
+          sendApplyHB = (m)=>
+            @broadcast m
+
+        for o in hb
+          _hb.push o
+          if _hb.length > 10
+            sendApplyHB
+              sync_step: "applyHB_"
+              data: _hb
+            _hb = []
+
+        sendApplyHB
+          sync_step : "applyHB"
+          data: _hb
+
+        if res.send_again? and @perform_send_again
+          send_again = do (sv = data.state_vector)=>
+            ()=>
+              hb = @getHB(sv).hb
+              for o in hb
+                _hb.push o
+                if _hb.length > 10
+                  @send sender,
+                    sync_step: "applyHB_"
+                    data: _hb
+                  _hb = []
+              @send sender,
+                sync_step: "applyHB",
+                data: _hb
+                sent_again: "true"
+          setTimeout send_again, 3000
+      else if res.sync_step is "applyHB"
+        @applyHB(res.data, sender is @current_sync_target)
+
+        if (@syncMethod is "syncAll" or res.sent_again?) and (not @is_synced) and ((@current_sync_target is sender) or (not @current_sync_target?))
+          @connections[sender].is_synced = true
+          @findNewSyncTarget()
+
+      else if res.sync_step is "applyHB_"
+        @applyHB(res.data, sender is @current_sync_target)
+
+
+  # Currently, the HB encodes operations as JSON. For the moment I want to keep it
+  # that way. Maybe we support encoding in the HB as XML in the future, but for now I don't want
+  # too much overhead. Y is very likely to get changed a lot in the future
+  #
+  # Because we don't want to encode JSON as string (with character escaping, wich makes it pretty much unreadable)
+  # we encode the JSON as XML.
+  #
+  # When the HB support encoding as XML, the format should look pretty much like this.
+
+  # does not support primitive values as array elements
+  # expects an ltx (less than xml) object
+  parseMessageFromXml: (m)->
+    parse_array = (node)->
+      for n in node.children
+        if n.getAttribute("isArray") is "true"
+          parse_array n
+        else
+          parse_object n
+
+    parse_object = (node)->
+      json = {}
+      for name, value  of node.attrs
+        int = parseInt(value)
+        if isNaN(int) or (""+int) isnt value
+          json[name] = value
+        else
+          json[name] = int
+      for n in node.children
+        name = n.name
+        if n.getAttribute("isArray") is "true"
+          json[name] = parse_array n
+        else
+          json[name] = parse_object n
+      json
+    parse_object m
+
+  # encode message in xml
+  # we use string because Strophe only accepts an "xml-string"..
+  # So {a:4,b:{c:5}} will look like
+  # <y a="4">
+  #   <b c="5"></b>
+  # </y>
+  # m - ltx element
+  # json - guess it ;)
+  #
+  encodeMessageToXml: (m, json)->
+    # attributes is optional
+    encode_object = (m, json)->
+      for name,value of json
+        if not value?
+          # nop
+        else if value.constructor is Object
+          encode_object m.c(name), value
+        else if value.constructor is Array
+          encode_array m.c(name), value
+        else
+          m.setAttribute(name,value)
+      m
+    encode_array = (m, array)->
+      m.setAttribute("isArray","true")
+      for e in array
+        if e.constructor is Object
+          encode_object m.c("array-element"), e
+        else
+          encode_array m.c("array-element"), e
+      m
+    if json.constructor is Object
+      encode_object m.c("y",{xmlns:"http://y.ninja/connector-stanza"}), json
+    else if json.constructor is Array
+      encode_array m.c("y",{xmlns:"http://y.ninja/connector-stanza"}), json
+    else
+      throw new Error "I can't encode this json!"
+
+  setIsBoundToY: ()->
+    @on_bound_to_y?()
+    delete @when_bound_to_y
+    @is_bound_to_y = true

lib/Engine.coffee

@@ -0,0 +1,115 @@
+
+window?.unprocessed_counter = 0 # del this
+window?.unprocessed_exec_counter = 0 # TODO
+window?.unprocessed_types = []
+
+#
+# @nodoc
+# The Engine handles how and in which order to execute operations and add operations to the HistoryBuffer.
+#
+class Engine
+
+  #
+  # @param {HistoryBuffer} HB
+  # @param {Object} types list of available types
+  #
+  constructor: (@HB, @types)->
+    @unprocessed_ops = []
+
+  #
+  # Parses an operatio from the json format. It uses the specified parser in your OperationType module.
+  #
+  parseOperation: (json)->
+    type = @types[json.type]
+    if type?.parse?
+      type.parse json
+    else
+      throw new Error "You forgot to specify a parser for type #{json.type}. The message is #{JSON.stringify json}."
+
+
+  #
+  # Apply a set of operations. E.g. the operations you received from another users HB._encode().
+  # @note You must not use this method when you already have ops in your HB!
+  ###
+  applyOpsBundle: (ops_json)->
+    ops = []
+    for o in ops_json
+      ops.push @parseOperation o
+    for o in ops
+      if not o.execute()
+        @unprocessed_ops.push o
+    @tryUnprocessed()
+  ###
+
+  #
+  # Same as applyOps but operations that are already in the HB are not applied.
+  # @see Engine.applyOps
+  #
+  applyOpsCheckDouble: (ops_json)->
+    for o in ops_json
+      if not @HB.getOperation(o.uid)?
+        @applyOp o
+
+  #
+  # Apply a set of operations. (Helper for using applyOp on Arrays)
+  # @see Engine.applyOp
+  applyOps: (ops_json)->
+    @applyOp ops_json
+
+  #
+  # Apply an operation that you received from another peer.
+  # TODO: make this more efficient!!
+  # - operations may only executed in order by creator, order them in object of arrays (key by creator)
+  # - you can probably make something like dependencies (creator1 waits for creator2)
+  applyOp: (op_json_array, fromHB = false)->
+    if op_json_array.constructor isnt Array
+      op_json_array = [op_json_array]
+    for op_json in op_json_array
+      if fromHB
+        op_json.fromHB = "true" # execute immediately, if
+      # $parse_and_execute will return false if $o_json was parsed and executed, otherwise the parsed operadion
+      o = @parseOperation op_json
+      o.parsed_from_json = op_json
+      if op_json.fromHB?
+        o.fromHB = op_json.fromHB
+      # @HB.addOperation o
+      if @HB.getOperation(o)?
+        # nop
+      else if ((not @HB.isExpectedOperation(o)) and (not o.fromHB?)) or (not o.execute())
+        @unprocessed_ops.push o
+        window?.unprocessed_types.push o.type # TODO: delete this
+    @tryUnprocessed()
+
+  #
+  # Call this method when you applied a new operation.
+  # It checks if operations that were previously not executable are now executable.
+  #
+  tryUnprocessed: ()->
+    while true
+      old_length = @unprocessed_ops.length
+      unprocessed = []
+      for op in @unprocessed_ops
+        if @HB.getOperation(op)?
+          # nop
+        else if (not @HB.isExpectedOperation(op) and (not op.fromHB?)) or (not op.execute())
+          unprocessed.push op
+      @unprocessed_ops = unprocessed
+      if @unprocessed_ops.length is old_length
+        break
+    if @unprocessed_ops.length isnt 0
+      @HB.invokeSync()
+
+
+module.exports = Engine
+
+
+
+
+
+
+
+
+
+
+
+

lib/HistoryBuffer.coffee

@@ -0,0 +1,227 @@
+
+#
+# @nodoc
+# An object that holds all applied operations.
+#
+# @note The HistoryBuffer is commonly abbreviated to HB.
+#
+class HistoryBuffer
+
+  #
+  # Creates an empty HB.
+  # @param {Object} user_id Creator of the HB.
+  #
+  constructor: (@user_id)->
+    @operation_counter = {}
+    @buffer = {}
+    @change_listeners = []
+    @garbage = [] # Will be cleaned on next call of garbageCollector
+    @trash = [] # Is deleted. Wait until it is not used anymore.
+    @performGarbageCollection = true
+    @garbageCollectTimeout = 30000
+    @reserved_identifier_counter = 0
+    setTimeout @emptyGarbage, @garbageCollectTimeout
+
+  # At the beginning (when the user id was not assigned yet),
+  # the operations are added to buffer._temp. When you finally get your user id,
+  # the operations are copies from buffer._temp to buffer[id]. Furthermore, when buffer[id] does already contain operations
+  # (because of a previous session), the uid.op_numbers of the operations have to be reassigned.
+  # This is what this function does. It adds them to buffer[id],
+  # and assigns them the correct uid.op_number and uid.creator
+  setUserId: (@user_id, state_vector)->
+    @buffer[@user_id] ?= []
+    buff = @buffer[@user_id]
+
+    # we assumed that we started with counter = 0.
+    # when we receive tha state_vector, and actually have
+    # counter = 10. Then we have to add 10 to every op_counter
+    counter_diff = state_vector[@user_id] or 0
+
+    if @buffer._temp?
+      for o_name,o of @buffer._temp
+        o.uid.creator = @user_id
+        o.uid.op_number += counter_diff
+        buff[o.uid.op_number] = o
+
+    @operation_counter[@user_id] = (@operation_counter._temp or 0) + counter_diff
+
+    delete @operation_counter._temp
+    delete @buffer._temp
+
+
+  emptyGarbage: ()=>
+    for o in @garbage
+      #if @getOperationCounter(o.uid.creator) > o.uid.op_number
+      o.cleanup?()
+
+    @garbage = @trash
+    @trash = []
+    if @garbageCollectTimeout isnt -1
+      @garbageCollectTimeoutId = setTimeout @emptyGarbage, @garbageCollectTimeout
+    undefined
+
+  #
+  # Get the user id with wich the History Buffer was initialized.
+  #
+  getUserId: ()->
+    @user_id
+
+  addToGarbageCollector: ()->
+    if @performGarbageCollection
+      for o in arguments
+        if o?
+          @garbage.push o
+
+  stopGarbageCollection: ()->
+    @performGarbageCollection = false
+    @setManualGarbageCollect()
+    @garbage = []
+    @trash = []
+
+  setManualGarbageCollect: ()->
+    @garbageCollectTimeout = -1
+    clearTimeout @garbageCollectTimeoutId
+    @garbageCollectTimeoutId = undefined
+
+  setGarbageCollectTimeout: (@garbageCollectTimeout)->
+
+  #
+  # I propose to use it in your Framework, to create something like a root element.
+  # An operation with this identifier is not propagated to other clients.
+  # This is why everybode must create the same operation with this uid.
+  #
+  getReservedUniqueIdentifier: ()->
+    {
+      creator : '_'
+      op_number : "_#{@reserved_identifier_counter++}"
+    }
+
+  #
+  # Get the operation counter that describes the current state of the document.
+  #
+  getOperationCounter: (user_id)->
+    if not user_id?
+      res = {}
+      for user,ctn of @operation_counter
+        res[user] = ctn
+      res
+    else
+      @operation_counter[user_id]
+
+  isExpectedOperation: (o)->
+    @operation_counter[o.uid.creator] ?= 0
+    o.uid.op_number <= @operation_counter[o.uid.creator]
+    true #TODO: !! this could break stuff. But I dunno why
+
+  #
+  # Encode this operation in such a way that it can be parsed by remote peers.
+  # TODO: Make this more efficient!
+  _encode: (state_vector={})->
+    json = []
+    unknown = (user, o_number)->
+      if (not user?) or (not o_number?)
+        throw new Error "dah!"
+      not state_vector[user]? or state_vector[user] <= o_number
+
+    for u_name,user of @buffer
+      # TODO next, if @state_vector[user] <= state_vector[user]
+      if u_name is "_"
+        continue
+      for o_number,o of user
+        if (not o.uid.noOperation?) and unknown(u_name, o_number)
+          # its necessary to send it, and not known in state_vector
+          o_json = o._encode()
+          if o.next_cl? # applies for all ops but the most right delimiter!
+            # search for the next _known_ operation. (When state_vector is {} then this is the Delimiter)
+            o_next = o.next_cl
+            while o_next.next_cl? and unknown(o_next.uid.creator, o_next.uid.op_number)
+              o_next = o_next.next_cl
+            o_json.next = o_next.getUid()
+          else if o.prev_cl? # most right delimiter only!
+            # same as the above with prev.
+            o_prev = o.prev_cl
+            while o_prev.prev_cl? and unknown(o_prev.uid.creator, o_prev.uid.op_number)
+              o_prev = o_prev.prev_cl
+            o_json.prev = o_prev.getUid()
+          json.push o_json
+
+    json
+
+  #
+  # Get the number of operations that were created by a user.
+  # Accordingly you will get the next operation number that is expected from that user.
+  # This will increment the operation counter.
+  #
+  getNextOperationIdentifier: (user_id)->
+    if not user_id?
+      user_id = @user_id
+    if not @operation_counter[user_id]?
+      @operation_counter[user_id] = 0
+    uid =
+      'creator' : user_id
+      'op_number' : @operation_counter[user_id]
+    @operation_counter[user_id]++
+    uid
+
+  #
+  # Retrieve an operation from a unique id.
+  #
+  # when uid has a "sub" property, the value of it will be applied
+  # on the operations retrieveSub method (which must! be defined)
+  #
+  getOperation: (uid)->
+    if uid.uid?
+      uid = uid.uid
+    o = @buffer[uid.creator]?[uid.op_number]
+    if uid.sub? and o?
+      o.retrieveSub uid.sub
+    else
+      o
+
+  #
+  # Add an operation to the HB. Note that this will not link it against
+  # other operations (it wont executed)
+  #
+  addOperation: (o)->
+    if not @buffer[o.uid.creator]?
+      @buffer[o.uid.creator] = {}
+    if @buffer[o.uid.creator][o.uid.op_number]?
+      throw new Error "You must not overwrite operations!"
+    if (o.uid.op_number.constructor isnt String) and (not @isExpectedOperation(o)) and (not o.fromHB?) # you already do this in the engine, so delete it here!
+      throw new Error "this operation was not expected!"
+    @addToCounter(o)
+    @buffer[o.uid.creator][o.uid.op_number] = o
+    o
+
+  removeOperation: (o)->
+    delete @buffer[o.uid.creator]?[o.uid.op_number]
+
+  # When the HB determines inconsistencies, then the invokeSync
+  # handler wil be called, which should somehow invoke the sync with another collaborator.
+  # The parameter of the sync handler is the user_id with wich an inconsistency was determined
+  setInvokeSyncHandler: (f)->
+    @invokeSync = f
+
+  # empty per default # TODO: do i need this?
+  invokeSync: ()->
+
+  # after you received the HB of another user (in the sync process),
+  # you renew your own state_vector to the state_vector of the other user
+  renewStateVector: (state_vector)->
+    for user,state of state_vector
+      if ((not @operation_counter[user]?) or (@operation_counter[user] < state_vector[user])) and state_vector[user]?
+        @operation_counter[user] = state_vector[user]
+
+  #
+  # Increment the operation_counter that defines the current state of the Engine.
+  #
+  addToCounter: (o)->
+    @operation_counter[o.uid.creator] ?= 0
+    # TODO: check if operations are send in order
+    if o.uid.op_number is @operation_counter[o.uid.creator]
+      @operation_counter[o.uid.creator]++
+    while @buffer[o.uid.creator][@operation_counter[o.uid.creator]]?
+      @operation_counter[o.uid.creator]++
+    undefined
+
+module.exports = HistoryBuffer

lib/ObjectType.coffee

@@ -0,0 +1,74 @@
+
+class YObject
+
+  constructor: (@_object = {})->
+    if @_object.constructor is Object
+      for name, val of @_object
+        if val.constructor is Object
+          @_object[name] = new YObject(val)
+    else
+      throw new Error "Y.Object accepts Json Objects only"
+
+  _name: "Object"
+
+  _getModel: (types, ops)->
+    if not @_model?
+      @_model = new ops.MapManager(@).execute()
+      for n,o of @_object
+        @_model.val n, o
+    delete @_object
+    @_model
+
+  _setModel: (@_model)->
+    delete @_object
+
+  observe: (f)->
+    @_model.observe f
+    @
+
+  unobserve: (f)->
+    @_model.unobserve f
+    @
+
+  #
+  # @overload val()
+  #   Get this as a Json object.
+  #   @return [Json]
+  #
+  # @overload val(name)
+  #   Get value of a property.
+  #   @param {String} name Name of the object property.
+  #   @return [*] Depends on the value of the property.
+  #
+  # @overload val(name, content)
+  #   Set a new property.
+  #   @param {String} name Name of the object property.
+  #   @param {Object|String} content Content of the object property.
+  #   @return [Object Type] This object. (supports chaining)
+  #
+  val: (name, content)->
+    if @_model?
+      @_model.val.apply @_model, arguments
+    else
+      if content?
+        @_object[name] = content
+      else if name?
+        @_object[name]
+      else
+        res = {}
+        for n,v of @_object
+          res[n] = v
+        res
+
+  delete: (name)->
+    @_model.delete(name)
+    @
+
+if window?
+  if window.Y?
+    window.Y.Object = YObject
+  else
+    throw new Error "You must first import Y!"
+
+if module?
+  module.exports = YObject

lib/Operations/Basic.coffee

@@ -0,0 +1,678 @@
+module.exports = ()->
+  # @see Engine.parse
+  ops = {}
+  execution_listener = []
+
+  #
+  # @private
+  # @abstract
+  # @nodoc
+  # A generic interface to ops.
+  #
+  # An operation has the following methods:
+  # * _encode: encodes an operation (needed only if instance of this operation is sent).
+  # * execute: execute the effects of this operations. Good examples are Insert-type and AddName-type
+  # * val: in the case that the operation holds a value
+  #
+  # Furthermore an encodable operation has a parser. We extend the parser object in order to parse encoded operations.
+  #
+  class ops.Operation
+
+    #
+    # @param {Object} uid A unique identifier.
+    # If uid is undefined, a new uid will be created before at the end of the execution sequence
+    #
+    constructor: (custom_type, uid, content, content_operations)->
+      if custom_type?
+        @custom_type = custom_type
+      @is_deleted = false
+      @garbage_collected = false
+      @event_listeners = [] # TODO: rename to observers or sth like that
+      if uid?
+        @uid = uid
+
+      # see encode to see, why we are doing it this way
+      if content is undefined
+        # nop
+      else if content? and content.creator?
+        @saveOperation 'content', content
+      else
+        @content = content
+      if content_operations?
+        @content_operations = {}
+        for name, op of content_operations
+          @saveOperation name, op, 'content_operations'
+
+    type: "Operation"
+
+    getContent: (name)->
+      if @content?
+        if @content.getCustomType?
+          @content.getCustomType()
+        else if @content.constructor is Object
+          if name?
+            if @content[name]?
+              @content[name]
+            else
+              @content_operations[name].getCustomType()
+          else
+            content = {}
+            for n,v of @content
+              content[n] = v
+            if @content_operations?
+              for n,v of @content_operations
+                v = v.getCustomType()
+                content[n] = v
+            content
+        else
+          @content
+      else
+        @content
+
+    retrieveSub: ()->
+      throw new Error "sub properties are not enable on this operation type!"
+
+    #
+    # Add an event listener. It depends on the operation which events are supported.
+    # @param {Function} f f is executed in case the event fires.
+    #
+    observe: (f)->
+      @event_listeners.push f
+
+    #
+    # Deletes function from the observer list
+    # @see Operation.observe
+    #
+    # @overload unobserve(event, f)
+    #   @param f     {Function} The function that you want to delete
+    unobserve: (f)->
+      @event_listeners = @event_listeners.filter (g)->
+        f isnt g
+
+    #
+    # Deletes all subscribed event listeners.
+    # This should be called, e.g. after this has been replaced.
+    # (Then only one replace event should fire. )
+    # This is also called in the cleanup method.
+    deleteAllObservers: ()->
+      @event_listeners = []
+
+    delete: ()->
+      (new ops.Delete undefined, @).execute()
+      null
+
+    #
+    # Fire an event.
+    # TODO: Do something with timeouts. You don't want this to fire for every operation (e.g. insert).
+    # TODO: do you need callEvent+forwardEvent? Only one suffices probably
+    callEvent: ()->
+      if @custom_type?
+        callon = @getCustomType()
+      else
+        callon = @
+      @forwardEvent callon, arguments...
+
+    #
+    # Fire an event and specify in which context the listener is called (set 'this').
+    # TODO: do you need this ?
+    forwardEvent: (op, args...)->
+      for f in @event_listeners
+        f.call op, args...
+
+    isDeleted: ()->
+      @is_deleted
+
+    applyDelete: (garbagecollect = true)->
+      if not @garbage_collected
+        #console.log "applyDelete: #{@type}"
+        @is_deleted = true
+        if garbagecollect
+          @garbage_collected = true
+          @HB.addToGarbageCollector @
+
+    cleanup: ()->
+      #console.log "cleanup: #{@type}"
+      @HB.removeOperation @
+      @deleteAllObservers()
+
+    #
+    # Set the parent of this operation.
+    #
+    setParent: (@parent)->
+
+    #
+    # Get the parent of this operation.
+    #
+    getParent: ()->
+      @parent
+
+    #
+    # Computes a unique identifier (uid) that identifies this operation.
+    #
+    getUid: ()->
+      if not @uid.noOperation?
+        @uid
+      else
+        if @uid.alt? # could be (safely) undefined
+          map_uid = @uid.alt.cloneUid()
+          map_uid.sub = @uid.sub
+          map_uid
+        else
+          undefined
+
+    cloneUid: ()->
+      uid = {}
+      for n,v of @getUid()
+        uid[n] = v
+      uid
+
+    #
+    # @private
+    # If not already done, set the uid
+    # Add this to the HB
+    # Notify the all the listeners.
+    #
+    execute: ()->
+      if @validateSavedOperations()
+        @is_executed = true
+        if not @uid?
+          # When this operation was created without a uid, then set it here.
+          # There is only one other place, where this can be done - before an Insertion
+          # is executed (because we need the creator_id)
+          @uid = @HB.getNextOperationIdentifier()
+        if not @uid.noOperation?
+          @HB.addOperation @
+          for l in execution_listener
+            l @_encode()
+        @
+      else
+        false
+
+    #
+    # @private
+    # Operations may depend on other operations (linked lists, etc.).
+    # The saveOperation and validateSavedOperations methods provide
+    # an easy way to refer to these operations via an uid or object reference.
+    #
+    # For example: We can create a new Delete operation that deletes the operation $o like this
+    #     - var d = new Delete(uid, $o);   or
+    #     - var d = new Delete(uid, $o.getUid());
+    # Either way we want to access $o via d.deletes. In the second case validateSavedOperations must be called first.
+    #
+    # @overload saveOperation(name, op_uid)
+    #   @param {String} name The name of the operation. After validating (with validateSavedOperations) the instantiated operation will be accessible via this[name].
+    #   @param {Object} op_uid A uid that refers to an operation
+    # @overload saveOperation(name, op)
+    #   @param {String} name The name of the operation. After calling this function op is accessible via this[name].
+    #   @param {Operation} op An Operation object
+    #
+    saveOperation: (name, op, base = "this")->
+      if op? and op._getModel?
+        op = op._getModel(@custom_types, @operations)
+      #
+      # Every instance of $Operation must have an $execute function.
+      # We use duck-typing to check if op is instantiated since there
+      # could exist multiple classes of $Operation
+      #
+      if not op?
+        # nop
+      else if op.execute? or not (op.op_number? and op.creator?)
+        # is instantiated, or op is string. Currently "Delimiter" is saved as string
+        # (in combination with @parent you can retrieve the delimiter..)
+        if base is "this"
+          @[name] = op
+        else
+          dest = @[base]
+          paths = name.split("/")
+          last_path = paths.pop()
+          for path in paths
+            dest = dest[path]
+          dest[last_path] = op
+      else
+        # not initialized. Do it when calling $validateSavedOperations()
+        @unchecked ?= {}
+        @unchecked[base] ?= {}
+        @unchecked[base][name] = op
+
+    #
+    # @private
+    # After calling this function all not instantiated operations will be accessible.
+    # @see Operation.saveOperation
+    #
+    # @return [Boolean] Whether it was possible to instantiate all operations.
+    #
+    validateSavedOperations: ()->
+      uninstantiated = {}
+      success = true
+      for base_name, base of @unchecked
+        for name, op_uid of base
+          op = @HB.getOperation op_uid
+          if op
+            if base_name is "this"
+              @[name] = op
+            else
+              dest = @[base_name]
+              paths = name.split("/")
+              last_path = paths.pop()
+              for path in paths
+                dest = dest[path]
+              dest[last_path] = op
+          else
+            uninstantiated[base_name] ?= {}
+            uninstantiated[base_name][name] = op_uid
+            success = false
+      if not success
+        @unchecked = uninstantiated
+        return false
+      else
+        delete @unchecked
+        return @
+
+    getCustomType: ()->
+      if not @custom_type?
+        # throw new Error "This operation was not initialized with a custom type"
+        @
+      else
+        if @custom_type.constructor is String
+          # has not been initialized yet (only the name is specified)
+          Type = @custom_types
+          for t in @custom_type.split(".")
+            Type = Type[t]
+          @custom_type = new Type()
+          @custom_type._setModel @
+        @custom_type
+
+    #
+    # @private
+    # Encode this operation in such a way that it can be parsed by remote peers.
+    #
+    _encode: (json = {})->
+      json.type = @type
+      json.uid = @getUid()
+      if @custom_type?
+        if @custom_type.constructor is String
+          json.custom_type = @custom_type
+        else
+          json.custom_type = @custom_type._name
+
+      if @content?.getUid?
+        json.content = @content.getUid()
+      else
+        json.content = @content
+      if @content_operations?
+        operations = {}
+        for n,o of @content_operations
+          if o._getModel?
+            o = o._getModel(@custom_types, @operations)
+          operations[n] = o.getUid()
+        json.content_operations = operations
+      json
+
+  #
+  # @nodoc
+  # A simple Delete-type operation that deletes an operation.
+  #
+  class ops.Delete extends ops.Operation
+
+    #
+    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
+    # @param {Object} deletes UID or reference of the operation that this to be deleted.
+    #
+    constructor: (custom_type, uid, deletes)->
+      @saveOperation 'deletes', deletes
+      super custom_type, uid
+
+    type: "Delete"
+
+    #
+    # @private
+    # Convert all relevant information of this operation to the json-format.
+    # This result can be sent to other clients.
+    #
+    _encode: ()->
+      {
+        'type': "Delete"
+        'uid': @getUid()
+        'deletes': @deletes.getUid()
+      }
+
+    #
+    # @private
+    # Apply the deletion.
+    #
+    execute: ()->
+      if @validateSavedOperations()
+        res = super
+        if res
+          @deletes.applyDelete @
+        res
+      else
+        false
+
+  #
+  # Define how to parse Delete operations.
+  #
+  ops.Delete.parse = (o)->
+    {
+      'uid' : uid
+      'deletes': deletes_uid
+    } = o
+    new this(null, uid, deletes_uid)
+
+  #
+  # @nodoc
+  # A simple insert-type operation.
+  #
+  # An insert operation is always positioned between two other insert operations.
+  # Internally this is realized as associative lists, whereby each insert operation has a predecessor and a successor.
+  # For the sake of efficiency we maintain two lists:
+  #   - The short-list (abbrev. sl) maintains only the operations that are not deleted (unimplemented, good idea?)
+  #   - The complete-list (abbrev. cl) maintains all operations
+  #
+  class ops.Insert extends ops.Operation
+
+    #
+    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
+    # @param {Operation} prev_cl The predecessor of this operation in the complete-list (cl)
+    # @param {Operation} next_cl The successor of this operation in the complete-list (cl)
+    #
+    constructor: (custom_type, content, content_operations, parent, uid, prev_cl, next_cl, origin)->
+      @saveOperation 'parent', parent
+      @saveOperation 'prev_cl', prev_cl
+      @saveOperation 'next_cl', next_cl
+      if origin?
+        @saveOperation 'origin', origin
+      else
+        @saveOperation 'origin', prev_cl
+      super custom_type, uid, content, content_operations
+
+    type: "Insert"
+
+    val: ()->
+      @getContent()
+
+    getNext: (i=1)->
+      n = @
+      while i > 0 and n.next_cl?
+        n = n.next_cl
+        if not n.is_deleted
+          i--
+      if n.is_deleted
+        null
+      n
+
+    getPrev: (i=1)->
+      n = @
+      while i > 0 and n.prev_cl?
+        n = n.prev_cl
+        if not n.is_deleted
+          i--
+      if n.is_deleted
+        null
+      else
+        n
+
+    #
+    # set content to null and other stuff
+    # @private
+    #
+    applyDelete: (o)->
+      @deleted_by ?= []
+      callLater = false
+      if @parent? and not @is_deleted and o? # o? : if not o?, then the delimiter deleted this Insertion. Furthermore, it would be wrong to call it. TODO: make this more expressive and save
+        # call iff wasn't deleted earlyer
+        callLater = true
+      if o?
+        @deleted_by.push o
+      garbagecollect = false
+      if @next_cl.isDeleted()
+        garbagecollect = true
+      super garbagecollect
+      if callLater
+        @parent.callOperationSpecificDeleteEvents(this, o)
+      if @prev_cl? and @prev_cl.isDeleted() and @prev_cl.garbage_collected isnt true
+        # garbage collect prev_cl
+        @prev_cl.applyDelete()
+
+    cleanup: ()->
+      if @next_cl.isDeleted()
+        # delete all ops that delete this insertion
+        for d in @deleted_by
+          d.cleanup()
+
+        # throw new Error "right is not deleted. inconsistency!, wrararar"
+        # change origin references to the right
+        o = @next_cl
+        while o.type isnt "Delimiter"
+          if o.origin is @
+            o.origin = @prev_cl
+          o = o.next_cl
+        # reconnect left/right
+        @prev_cl.next_cl = @next_cl
+        @next_cl.prev_cl = @prev_cl
+
+        # delete content
+        # - we must not do this in applyDelete, because this would lead to inconsistencies
+        # (e.g. the following operation order must be invertible :
+        #   Insert refers to content, then the content is deleted)
+        # Therefore, we have to do this in the cleanup
+        # * NODE: We never delete Insertions!
+        if @content instanceof ops.Operation and not (@content instanceof ops.Insert)
+          @content.referenced_by--
+          if @content.referenced_by <= 0 and not @content.is_deleted
+            @content.applyDelete()
+        delete @content
+        super
+      # else
+      #   Someone inserted something in the meantime.
+      #   Remember: this can only be garbage collected when next_cl is deleted
+
+    #
+    # @private
+    # The amount of positions that $this operation was moved to the right.
+    #
+    getDistanceToOrigin: ()->
+      d = 0
+      o = @prev_cl
+      while true
+        if @origin is o
+          break
+        d++
+        o = o.prev_cl
+      d
+
+    #
+    # @private
+    # Include this operation in the associative lists.
+    execute: ()->
+      if not @validateSavedOperations()
+        return false
+      else
+        if @content instanceof ops.Operation
+          @content.insert_parent = @ # TODO: this is probably not necessary and only nice for debugging
+          @content.referenced_by ?= 0
+          @content.referenced_by++
+        if @parent?
+          if not @prev_cl?
+            @prev_cl = @parent.beginning
+          if not @origin?
+            @origin = @prev_cl
+          else if @origin is "Delimiter"
+            @origin = @parent.beginning
+          if not @next_cl?
+            @next_cl = @parent.end
+        if @prev_cl?
+          distance_to_origin = @getDistanceToOrigin() # most cases: 0
+          o = @prev_cl.next_cl
+          i = distance_to_origin # loop counter
+
+          # $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!)
+          while true
+            if o isnt @next_cl
+              # $o happened concurrently
+              if o.getDistanceToOrigin() is i
+                # case 1
+                if o.uid.creator < @uid.creator
+                  @prev_cl = o
+                  distance_to_origin = i + 1
+                else
+                  # nop
+              else if o.getDistanceToOrigin() < i
+                # case 2
+                if i - distance_to_origin <= o.getDistanceToOrigin()
+                  @prev_cl = o
+                  distance_to_origin = i + 1
+                else
+                  #nop
+              else
+                # case 3
+                break
+              i++
+              o = o.next_cl
+            else
+              # $this knows that $o exists,
+              break
+          # now reconnect everything
+          @next_cl = @prev_cl.next_cl
+          @prev_cl.next_cl = @
+          @next_cl.prev_cl = @
+
+        @setParent @prev_cl.getParent() # do Insertions always have a parent?
+        super # notify the execution_listeners
+        @parent.callOperationSpecificInsertEvents(this)
+        @
+
+    #
+    # Compute the position of this operation.
+    #
+    getPosition: ()->
+      position = 0
+      prev = @prev_cl
+      while true
+        if prev instanceof ops.Delimiter
+          break
+        if not prev.isDeleted()
+          position++
+        prev = prev.prev_cl
+      position
+
+    #
+    # Convert all relevant information of this operation to the json-format.
+    # This result can be send to other clients.
+    #
+    _encode: (json = {})->
+      json.prev = @prev_cl.getUid()
+      json.next = @next_cl.getUid()
+
+      if @origin.type is "Delimiter"
+        json.origin = "Delimiter"
+      else if @origin isnt @prev_cl
+        json.origin = @origin.getUid()
+
+      # if not (json.prev? and json.next?)
+      json.parent = @parent.getUid()
+
+      super json
+
+  ops.Insert.parse = (json)->
+    {
+      'content' : content
+      'content_operations' : content_operations
+      'uid' : uid
+      'prev': prev
+      'next': next
+      'origin' : origin
+      'parent' : parent
+    } = json
+    new this null, content, content_operations, parent, uid, prev, next, origin
+
+  #
+  # @nodoc
+  # A delimiter is placed at the end and at the beginning of the associative lists.
+  # This is necessary in order to have a beginning and an end even if the content
+  # of the Engine is empty.
+  #
+  class ops.Delimiter extends ops.Operation
+    #
+    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
+    # @param {Operation} prev_cl The predecessor of this operation in the complete-list (cl)
+    # @param {Operation} next_cl The successor of this operation in the complete-list (cl)
+    #
+    constructor: (prev_cl, next_cl, origin)->
+      @saveOperation 'prev_cl', prev_cl
+      @saveOperation 'next_cl', next_cl
+      @saveOperation 'origin', prev_cl
+      super null, {noOperation: true}
+
+    type: "Delimiter"
+
+    applyDelete: ()->
+      super()
+      o = @prev_cl
+      while o?
+        o.applyDelete()
+        o = o.prev_cl
+      undefined
+
+    cleanup: ()->
+      super()
+
+    #
+    # @private
+    #
+    execute: ()->
+      if @unchecked?['next_cl']?
+        super
+      else if @unchecked?['prev_cl']
+        if @validateSavedOperations()
+          if @prev_cl.next_cl?
+            throw new Error "Probably duplicated operations"
+          @prev_cl.next_cl = @
+          super
+        else
+          false
+      else if @prev_cl? and not @prev_cl.next_cl?
+        delete @prev_cl.unchecked.next_cl
+        @prev_cl.next_cl = @
+        super
+      else if @prev_cl? or @next_cl? or true # TODO: are you sure? This can happen right?
+        super
+      #else
+      #  throw new Error "Delimiter is unsufficient defined!"
+
+    #
+    # @private
+    #
+    _encode: ()->
+      {
+        'type' : @type
+        'uid' : @getUid()
+        'prev' : @prev_cl?.getUid()
+        'next' : @next_cl?.getUid()
+      }
+
+  ops.Delimiter.parse = (json)->
+    {
+    'uid' : uid
+    'prev' : prev
+    'next' : next
+    } = json
+    new this(uid, prev, next)
+
+  # This is what this module exports after initializing it with the HistoryBuffer
+  {
+    'operations' : ops
+    'execution_listener' : execution_listener
+  }

lib/Operations/Structured.coffee

@@ -0,0 +1,533 @@
+basic_ops_uninitialized = require "./Basic"
+
+module.exports = ()->
+  basic_ops = basic_ops_uninitialized()
+  ops = basic_ops.operations
+
+  #
+  # @nodoc
+  # Manages map like objects. E.g. Json-Type and XML attributes.
+  #
+  class ops.MapManager extends ops.Operation
+
+    #
+    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
+    #
+    constructor: (custom_type, uid, content, content_operations)->
+      @_map = {}
+      super custom_type, uid, content, content_operations
+
+    type: "MapManager"
+
+    applyDelete: ()->
+      for name,p of @_map
+        p.applyDelete()
+      super()
+
+    cleanup: ()->
+      super()
+
+    map: (f)->
+      for n,v of @_map
+        f(n,v)
+      undefined
+
+    #
+    # @see JsonOperations.val
+    #
+    val: (name, content)->
+      if arguments.length > 1
+        if content? and content._getModel?
+          rep = content._getModel(@custom_types, @operations)
+        else
+          rep = content
+        @retrieveSub(name).replace rep
+        @getCustomType()
+      else if name?
+        prop = @_map[name]
+        if prop? and not prop.isContentDeleted()
+          res = prop.val()
+          if res instanceof ops.Operation
+            res.getCustomType()
+          else
+            res
+        else
+          undefined
+      else
+        result = {}
+        for name,o of @_map
+          if not o.isContentDeleted()
+            result[name] = o.val()
+        result
+
+    delete: (name)->
+      @_map[name]?.deleteContent()
+      @
+
+    retrieveSub: (property_name)->
+      if not @_map[property_name]?
+        event_properties =
+          name: property_name
+        event_this = @
+        rm_uid =
+          noOperation: true
+          sub: property_name
+          alt: @
+        rm = new ops.ReplaceManager null, event_properties, event_this, rm_uid # this operation shall not be saved in the HB
+        @_map[property_name] = rm
+        rm.setParent @, property_name
+        rm.execute()
+      @_map[property_name]
+
+  ops.MapManager.parse = (json)->
+    {
+      'uid' : uid
+      'custom_type' : custom_type
+      'content' : content
+      'content_operations' : content_operations
+    } = json
+    new this(custom_type, uid, content, content_operations)
+
+
+
+  #
+  # @nodoc
+  # Manages a list of Insert-type operations.
+  #
+  class ops.ListManager extends ops.Operation
+
+    #
+    # A ListManager maintains a non-empty list that has a beginning and an end (both Delimiters!)
+    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
+    # @param {Delimiter} beginning Reference or Object.
+    # @param {Delimiter} end Reference or Object.
+    constructor: (custom_type, uid, content, content_operations)->
+      @beginning = new ops.Delimiter undefined, undefined
+      @end =       new ops.Delimiter @beginning, undefined
+      @beginning.next_cl = @end
+      @beginning.execute()
+      @end.execute()
+      super custom_type, uid, content, content_operations
+
+    type: "ListManager"
+
+
+    applyDelete: ()->
+      o = @beginning
+      while o?
+        o.applyDelete()
+        o = o.next_cl
+      super()
+
+    cleanup: ()->
+      super()
+
+
+    toJson: (transform_to_value = false)->
+      val = @val()
+      for i, o in val
+        if o instanceof ops.Object
+          o.toJson(transform_to_value)
+        else if o instanceof ops.ListManager
+          o.toJson(transform_to_value)
+        else if transform_to_value and o instanceof ops.Operation
+          o.val()
+        else
+          o
+
+    #
+    # @private
+    # @see Operation.execute
+    #
+    execute: ()->
+      if @validateSavedOperations()
+        @beginning.setParent @
+        @end.setParent @
+        super
+      else
+        false
+
+    # Get the element previous to the delemiter at the end
+    getLastOperation: ()->
+      @end.prev_cl
+
+    # similar to the above
+    getFirstOperation: ()->
+      @beginning.next_cl
+
+    # Transforms the the list to an array
+    # Doesn't return left-right delimiter.
+    toArray: ()->
+      o = @beginning.next_cl
+      result = []
+      while o isnt @end
+        if not o.is_deleted
+          result.push o.val()
+        o = o.next_cl
+      result
+
+    map: (f)->
+      o = @beginning.next_cl
+      result = []
+      while o isnt @end
+        if not o.is_deleted
+          result.push f(o)
+        o = o.next_cl
+      result
+
+    fold: (init, f)->
+      o = @beginning.next_cl
+      while o isnt @end
+        if not o.is_deleted
+          init = f(init, o)
+        o = o.next_cl
+      init
+
+    val: (pos)->
+      if pos?
+        o = @getOperationByPosition(pos+1)
+        if not (o instanceof ops.Delimiter)
+          o.val()
+        else
+          throw new Error "this position does not exist"
+      else
+        @toArray()
+
+    ref: (pos)->
+      if pos?
+        o = @getOperationByPosition(pos+1)
+        if not (o instanceof ops.Delimiter)
+          o
+        else
+          null
+          # throw new Error "this position does not exist"
+      else
+        throw new Error "you must specify a position parameter"
+
+    #
+    # Retrieves the x-th not deleted element.
+    # e.g. "abc" : the 1th character is "a"
+    # the 0th character is the left Delimiter
+    #
+    getOperationByPosition: (position)->
+      o = @beginning
+      while true
+        # find the i-th op
+        if o instanceof ops.Delimiter and o.prev_cl?
+          # the user or you gave a position parameter that is to big
+          # for the current array. Therefore we reach a Delimiter.
+          # Then, we'll just return the last character.
+          o = o.prev_cl
+          while o.isDeleted() and o.prev_cl?
+            o = o.prev_cl
+          break
+        if position <= 0 and not o.isDeleted()
+          break
+
+        o = o.next_cl
+        if not o.isDeleted()
+          position -= 1
+      o
+
+    push: (content)->
+      @insertAfter @end.prev_cl, [content]
+
+    insertAfter: (left, contents)->
+      right = left.next_cl
+      while right.isDeleted()
+        right = right.next_cl # find the first character to the right, that is not deleted. In the case that position is 0, its the Delimiter.
+      left = right.prev_cl
+
+      # TODO: always expect an array as content. Then you can combine this with the other option (else)
+      if contents instanceof ops.Operation
+        (new ops.Insert null, content, null, undefined, undefined, left, right).execute()
+      else
+        for c in contents
+          if c? and c._name? and c._getModel?
+            c = c._getModel(@custom_types, @operations)
+          tmp = (new ops.Insert null, c, null, undefined, undefined, left, right).execute()
+          left = tmp
+      @
+
+    #
+    # Inserts an array of content into this list.
+    # @Note: This expects an array as content!
+    #
+    # @return {ListManager Type} This String object.
+    #
+    insert: (position, contents)->
+      ith = @getOperationByPosition position
+      # the (i-1)th character. e.g. "abc" the 1th character is "a"
+      # the 0th character is the left Delimiter
+      @insertAfter ith, contents
+
+    #
+    # Deletes a part of the word.
+    #
+    # @return {ListManager Type} This String object
+    #
+    delete: (position, length = 1)->
+      o = @getOperationByPosition(position+1) # position 0 in this case is the deletion of the first character
+
+      delete_ops = []
+      for i in [0...length]
+        if o instanceof ops.Delimiter
+          break
+        d = (new ops.Delete null, undefined, o).execute()
+        o = o.next_cl
+        while (not (o instanceof ops.Delimiter)) and o.isDeleted()
+          o = o.next_cl
+        delete_ops.push d._encode()
+      @
+
+
+    callOperationSpecificInsertEvents: (op)->
+      getContentType = (content)->
+        if content instanceof ops.Operation
+          content.getCustomType()
+        else
+          content
+      @callEvent [
+        type: "insert"
+        reference: op
+        position: op.getPosition()
+        object: @getCustomType()
+        changedBy: op.uid.creator
+        value: getContentType op.val()
+      ]
+
+    callOperationSpecificDeleteEvents: (op, del_op)->
+      @callEvent [
+        type: "delete"
+        reference: op
+        position: op.getPosition()
+        object: @getCustomType() # TODO: You can combine getPosition + getParent in a more efficient manner! (only left Delimiter will hold @parent)
+        length: 1
+        changedBy: del_op.uid.creator
+        oldValue: op.val()
+      ]
+
+  ops.ListManager.parse = (json)->
+    {
+      'uid' : uid
+      'custom_type': custom_type
+      'content' : content
+      'content_operations' : content_operations
+    } = json
+    new this(custom_type, uid, content, content_operations)
+
+  class ops.Composition extends ops.ListManager
+
+    constructor: (custom_type, @_composition_value, composition_value_operations, uid, tmp_composition_ref)->
+      # we can't use @seveOperation 'composition_ref', tmp_composition_ref here,
+      # because then there is a "loop" (insertion refers to parent, refers to insertion..)
+      # This is why we have to check in @callOperationSpecificInsertEvents until we find it
+      super custom_type, uid
+      if tmp_composition_ref?
+        @tmp_composition_ref = tmp_composition_ref
+      else
+        @composition_ref = @end.prev_cl
+      if composition_value_operations?
+        @composition_value_operations = {}
+        for n,o of composition_value_operations
+          @saveOperation n, o, '_composition_value'
+
+    type: "Composition"
+
+    #
+    # @private
+    # @see Operation.execute
+    #
+    execute: ()->
+      if @validateSavedOperations()
+        @getCustomType()._setCompositionValue @_composition_value
+        delete @_composition_value
+        # check if tmp_composition_ref already exists
+        if @tmp_composition_ref
+          composition_ref = @HB.getOperation @tmp_composition_ref
+          if composition_ref?
+            delete @tmp_composition_ref
+            @composition_ref = composition_ref
+        super
+      else
+        false
+
+    #
+    # This is called, when the Insert-operation was successfully executed.
+    #
+    callOperationSpecificInsertEvents: (op)->
+      if @tmp_composition_ref?
+        if op.uid.creator is @tmp_composition_ref.creator and op.uid.op_number is @tmp_composition_ref.op_number
+          @composition_ref = op
+          delete @tmp_composition_ref
+          op = op.next_cl
+          if op is @end
+            return
+        else
+          return
+
+      o = @end.prev_cl
+      while o isnt op
+        @getCustomType()._unapply o.undo_delta
+        o = o.prev_cl
+      while o isnt @end
+        o.undo_delta = @getCustomType()._apply o.val()
+        o = o.next_cl
+      @composition_ref = @end.prev_cl
+
+      @callEvent [
+        type: "update"
+        changedBy: op.uid.creator
+        newValue: @val()
+      ]
+
+    callOperationSpecificDeleteEvents: (op, del_op)->
+      return
+
+    #
+    # Create a new Delta
+    # - inserts new Content at the end of the list
+    # - updates the composition_value
+    # - updates the composition_ref
+    #
+    # @param delta The delta that is applied to the composition_value
+    #
+    applyDelta: (delta, operations)->
+      (new ops.Insert null, delta, operations, @, null, @end.prev_cl, @end).execute()
+      undefined
+
+    #
+    # Encode this operation in such a way that it can be parsed by remote peers.
+    #
+    _encode: (json = {})->
+      custom = @getCustomType()._getCompositionValue()
+      json.composition_value = custom.composition_value
+      if custom.composition_value_operations?
+        json.composition_value_operations = {}
+        for n,o of custom.composition_value_operations
+          json.composition_value_operations[n] = o.getUid()
+      if @composition_ref?
+        json.composition_ref = @composition_ref.getUid()
+      else
+        json.composition_ref = @tmp_composition_ref
+      super json
+
+  ops.Composition.parse = (json)->
+    {
+      'uid' : uid
+      'custom_type': custom_type
+      'composition_value' : composition_value
+      'composition_value_operations' : composition_value_operations
+      'composition_ref' : composition_ref
+    } = json
+    new this(custom_type, composition_value, composition_value_operations, uid, composition_ref)
+
+
+  #
+  # @nodoc
+  # Adds support for replace. The ReplaceManager manages Replaceable operations.
+  # Each Replaceable holds a value that is now replaceable.
+  #
+  # The TextType-type has implemented support for replace
+  # @see TextType
+  #
+  class ops.ReplaceManager extends ops.ListManager
+    #
+    # @param {Object} event_properties Decorates the event that is thrown by the RM
+    # @param {Object} event_this The object on which the event shall be executed
+    # @param {Operation} initial_content Initialize this with a Replaceable that holds the initial_content.
+    # @param {Object} uid A unique identifier. If uid is undefined, a new uid will be created.
+    # @param {Delimiter} beginning Reference or Object.
+    # @param {Delimiter} end Reference or Object.
+    constructor: (custom_type, @event_properties, @event_this, uid)->
+      if not @event_properties['object']?
+        @event_properties['object'] = @event_this.getCustomType()
+      super custom_type, uid
+
+    type: "ReplaceManager"
+
+    #
+    # This doesn't throw the same events as the ListManager. Therefore, the
+    # Replaceables also not throw the same events.
+    # So, ReplaceManager and ListManager both implement
+    # these functions that are called when an Insertion is executed (at the end).
+    #
+    #
+    callEventDecorator: (events)->
+      if not @isDeleted()
+        for event in events
+          for name,prop of @event_properties
+            event[name] = prop
+        @event_this.callEvent events
+      undefined
+
+    #
+    # This is called, when the Insert-type was successfully executed.
+    # TODO: consider doing this in a more consistent manner. This could also be
+    # done with execute. But currently, there are no specital Insert-ops for ListManager.
+    #
+    callOperationSpecificInsertEvents: (op)->
+      if op.next_cl.type is "Delimiter" and op.prev_cl.type isnt "Delimiter"
+        # this replaces another Replaceable
+        if not op.is_deleted # When this is received from the HB, this could already be deleted!
+          old_value = op.prev_cl.val()
+          @callEventDecorator [
+            type: "update"
+            changedBy: op.uid.creator
+            oldValue: old_value
+          ]
+        op.prev_cl.applyDelete()
+      else if op.next_cl.type isnt "Delimiter"
+        # This won't be recognized by the user, because another
+        # concurrent operation is set as the current value of the RM
+        op.applyDelete()
+      else # prev _and_ next are Delimiters. This is the first created Replaceable in the RM
+        @callEventDecorator [
+          type: "add"
+          changedBy: op.uid.creator
+        ]
+      undefined
+
+    callOperationSpecificDeleteEvents: (op, del_op)->
+      if op.next_cl.type is "Delimiter"
+        @callEventDecorator [
+          type: "delete"
+          changedBy: del_op.uid.creator
+          oldValue: op.val()
+        ]
+
+
+    #
+    # Replace the existing word with a new word.
+    #
+    # @param content {Operation} The new value of this ReplaceManager.
+    # @param replaceable_uid {UID} Optional: Unique id of the Replaceable that is created
+    #
+    replace: (content, replaceable_uid)->
+      o = @getLastOperation()
+      relp = (new ops.Insert null, content, null, @, replaceable_uid, o, o.next_cl).execute()
+      # TODO: delete repl (for debugging)
+      undefined
+
+    isContentDeleted: ()->
+      @getLastOperation().isDeleted()
+
+    deleteContent: ()->
+      last_op = @getLastOperation()
+      if (not last_op.isDeleted()) and last_op.type isnt "Delimiter"
+        (new ops.Delete null, undefined, @getLastOperation().uid).execute()
+      undefined
+
+    #
+    # Get the value of this
+    # @return {String}
+    #
+    val: ()->
+      o = @getLastOperation()
+      #if o instanceof ops.Delimiter
+        # throw new Error "Replace Manager doesn't contain anything."
+      o.val?() # ? - for the case that (currently) the RM does not contain anything (then o is a Delimiter)
+
+
+
+  basic_ops

lib/y-object.coffee

@@ -0,0 +1,55 @@
+
+bindToChildren = (that)->
+  for i in [0...that.children.length]
+    attr = that.children.item(i)
+    if attr.name?
+      attr.val = that.val.val(attr.name)
+  that.val.observe (events)->
+    for event in events
+      if event.name?
+        for i in [0...that.children.length]
+          attr = that.children.item(i)
+          if attr.name? and attr.name is event.name
+            newVal = that.val.val(attr.name)
+            if attr.val isnt newVal
+              attr.val = newVal
+
+Polymer "y-object",
+  ready: ()->
+    if @connector?
+      @val = new Y @connector
+      bindToChildren @
+    else if @val?
+      bindToChildren @
+
+  valChanged: ()->
+    if @val? and @val._name is "Object"
+      bindToChildren @
+
+  connectorChanged: ()->
+    if (not @val?)
+      @val = new Y @connector
+      bindToChildren @
+
+Polymer "y-property",
+  ready: ()->
+    if @val? and @name?
+      if @val.constructor is Object
+        @val = @parentElement.val(@name,new Y.Object(@val)).val(@name)
+        # TODO: please use instanceof instead of ._name,
+        # since it is more safe (consider someone putting a custom Object type here)
+      else if typeof @val is "string"
+        @parentElement.val(@name,@val)
+      if @val._name is "Object"
+        bindToChildren @
+
+  valChanged: ()->
+    if @val? and @name?
+      if @val.constructor is Object
+        @val = @parentElement.val.val(@name, new Y.Object(@val)).val(@name)
+        # TODO: please use instanceof instead of ._name,
+        # since it is more safe (consider someone putting a custom Object type here)
+      else if @val._name is "Object"
+        bindToChildren @
+      else if @parentElement.val?.val? and @val isnt @parentElement.val.val(@name)
+        @parentElement.val.val @name, @val

lib/y.coffee

@@ -0,0 +1,38 @@
+
+structured_ops_uninitialized = require "./Operations/Structured"
+
+HistoryBuffer = require "./HistoryBuffer"
+Engine = require "./Engine"
+adaptConnector = require "./ConnectorAdapter"
+
+createY = (connector)->
+  if connector.user_id?
+    user_id = connector.user_id # TODO: change to getUniqueId()
+  else
+    user_id = "_temp"
+    connector.when_received_state_vector_listeners = [(state_vector)->
+        HB.setUserId this.user_id, state_vector
+      ]
+  HB = new HistoryBuffer user_id
+  ops_manager = structured_ops_uninitialized HB, this.constructor
+  ops = ops_manager.operations
+
+  engine = new Engine HB, ops
+  adaptConnector connector, engine, HB, ops_manager.execution_listener
+
+  ops.Operation.prototype.HB = HB
+  ops.Operation.prototype.operations = ops
+  ops.Operation.prototype.engine = engine
+  ops.Operation.prototype.connector = connector
+  ops.Operation.prototype.custom_types = this.constructor
+
+  ct = new createY.Object()
+  model = new ops.MapManager(ct, HB.getReservedUniqueIdentifier()).execute()
+  ct._setModel model
+  ct
+
+module.exports = createY
+if window?
+  window.Y = createY
+
+createY.Object = require "./ObjectType"

package.json

@@ -1,80 +1,65 @@
 {
   "name": "yjs",
-  "version": "13.0.0-81",
-  "description": "Shared Editing Library",
-  "main": "./dist/yjs.js",
-  "module": "./src/index.js",
-  "sideEffects": false,
+  "version": "0.5.3",
+  "description": "A Framework that enables Real-Time Collaboration on arbitrary data structures.",
+  "main": "./build/node/y.js",
   "scripts": {
-    "test": "npm run dist && PRODUCTION=1 node ./dist/tests.js --repitition-time 50 --production",
-    "test-exhaustive": "npm run lint && npm run dist && node ./dist/tests.js --repitition-time 10000",
-    "dist": "rm -rf dist examples/build && rollup -c",
-    "serve-examples": "concurrently 'npm run watch' 'serve examples'",
-    "watch": "rollup -wc",
-    "lint": "standard && tsc",
-    "docs": "rm -rf docs; jsdoc --configure ./.jsdoc.json --verbose --readme ./README.v13.md --package ./package.json || true",
-    "serve-docs": "npm run docs && serve ./docs/",
-    "preversion": "PRODUCTION=1 npm run dist && node ./dist/tests.js --repitition-time 1000",
-    "postversion": "git push && git push --tags",
-    "debug": "concurrently 'live-server --port=3443 --entry-file=test.html' 'npm run watch'",
-    "trace-deopt": "clear && rollup -c  && node --trace-deopt dist/test.js",
-    "trace-opt": "clear && rollup -c  && node --trace-opt dist/test.js"
-  },
-  "files": [
-    "dist/*",
-    "src/*",
-    "tests/*",
-    "docs/*"
-  ],
-  "dictionaries": {
-    "doc": "docs",
-    "example": "examples",
-    "test": "tests"
-  },
-  "standard": {
-    "ignore": [
-      "/dist",
-      "/node_modules",
-      "/docs",
-      "/examples/build"
-    ]
+    "prepublish": "./node_modules/gulp/bin/gulp.js build_node",
+    "test": "./node_modules/gulp/bin/gulp.js mocha"
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/y-js/yjs.git"
+    "url": "https://github.com/rwth-acis/yjs"
   },
   "keywords": [
-    "crdt"
+    "OT",
+    "collaboration",
+    "synchronization",
+    "ShareJS",
+    "Coweb",
+    "concurrency"
   ],
   "author": "Kevin Jahns",
   "email": "kevin.jahns@rwth-aachen.de",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/y-js/yjs/issues"
+    "url": "https://github.com/rwth-acis/yjs/issues"
   },
-  "homepage": "http://y-js.org",
+  "homepage": "https://dadamonad.github.io/yjs/",
   "dependencies": {
-    "lib0": "0.0.2"
   },
   "devDependencies": {
-    "y-protocols": "0.0.3",
-    "codemirror": "^5.42.0",
-    "concurrently": "^3.6.1",
-    "jsdoc": "^3.5.5",
-    "live-server": "^1.2.1",
-    "prosemirror-example-setup": "^1.0.1",
-    "prosemirror-schema-basic": "^1.0.0",
-    "prosemirror-state": "^1.2.2",
-    "prosemirror-view": "^1.6.5",
-    "quill": "^1.3.6",
-    "quill-cursors": "^1.0.3",
-    "rollup": "^1.1.2",
-    "rollup-cli": "^1.0.9",
-    "rollup-plugin-commonjs": "^9.2.0",
-    "rollup-plugin-node-resolve": "^4.0.0",
-    "rollup-plugin-terser": "^4.0.4",
-    "standard": "^11.0.1",
-    "tui-jsdoc-template": "^1.2.2",
-    "typescript": "^3.3.3333"
+    "chai": "^2.2.0",
+    "codo": "^2.0.9",
+    "coffee-errors": "~0.8.6",
+    "coffee-script": "^1.7.1",
+    "coffeeify": "^0.6.0",
+    "gulp": "^3.8.7",
+    "gulp-browserify": "^0.5.0",
+    "gulp-cached": "^1.0.1",
+    "gulp-coffee": "^2.1.1",
+    "gulp-coffeeify": "^0.1.2",
+    "gulp-coffeelint": "^0.3.3",
+    "gulp-concat": "^2.3.4",
+    "gulp-copy": "0.0.2",
+    "gulp-debug": "^1.0.0",
+    "gulp-exit": "0.0.2",
+    "gulp-git": "^0.5.0",
+    "gulp-if": "^1.2.4",
+    "gulp-ignore": "^1.2.0",
+    "gulp-ljs": "^0.1.1",
+    "gulp-mocha": "^0.5.2",
+    "gulp-plumber": "^0.6.6",
+    "gulp-rename": "^1.2.0",
+    "gulp-rimraf": "^0.1.0",
+    "gulp-run": "^1.6.3",
+    "gulp-sourcemaps": "^1.1.1",
+    "gulp-uglify": "^0.3.1",
+    "gulp-watch": "^3.0.0",
+    "jquery": "^2.1.1",
+    "underscore": "^1.6.0",
+    "mocha": "^2.1.0",
+    "sinon": "^1.12.2",
+    "sinon-chai": "^2.7.0"
   }
 }

rollup.config.js

@@ -1,105 +0,0 @@
-import nodeResolve from 'rollup-plugin-node-resolve'
-import commonjs from 'rollup-plugin-commonjs'
-import { terser } from 'rollup-plugin-terser'
-
-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 `${process.cwd()}/src/index.js`
-    }
-    if (customModules.has(importee.split('/')[0])) {
-      return `${process.cwd()}/../${importee}/src/${importee}.js`
-    }
-    if (customLibModules.has(importee.split('/')[0])) {
-      return `${process.cwd()}/../${importee}`
-    }
-    return null
-  }
-}
-
-const minificationPlugins = process.env.PRODUCTION ? [terser({
-  module: true,
-  compress: {
-    hoist_vars: true,
-    module: true,
-    passes: 5,
-    pure_getters: true,
-    unsafe_comps: true,
-    unsafe_undefined: true
-  },
-  mangle: {
-    toplevel: true
-  }
-})] : []
-
-export default [{
-  input: './src/index.js',
-  output: [{
-    name: 'Y',
-    file: 'dist/yjs.js',
-    format: 'cjs',
-    sourcemap: true,
-    paths: path => {
-      if (/^lib0\//.test(path)) {
-        return `lib0/dist/${path.slice(5)}`
-      }
-      return path
-    }
-  }, {
-    name: 'Y',
-    file: 'dist/yjs.mjs',
-    format: 'es',
-    sourcemap: true
-  }],
-  external: id => /^lib0\//.test(id)
-}, {
-  input: './tests/index.js',
-  output: {
-    name: 'test',
-    file: 'dist/tests.js',
-    format: 'iife',
-    sourcemap: true
-  },
-  plugins: [
-    debugResolve,
-    nodeResolve({
-      sourcemap: true,
-      module: true,
-      browser: true
-    }),
-    commonjs()
-  ]
-}, {
-  input: ['./examples/textarea.js', './examples/prosemirror.js'], // './examples/quill.js', './examples/dom.js', './examples/codemirror.js'
-  output: {
-    dir: 'examples/build',
-    format: 'esm',
-    sourcemap: true
-  },
-  plugins: [
-    debugResolve,
-    nodeResolve({
-      sourcemap: true,
-      module: true,
-      browser: true
-    }),
-    commonjs(),
-    ...minificationPlugins
-  ]
-}]

src/index.js

@@ -1,48 +0,0 @@
-
-export {
-  Y,
-  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,
-  YEvent,
-  AbstractItem,
-  AbstractStruct,
-  GC,
-  ItemBinary,
-  ItemDeleted,
-  ItemEmbed,
-  ItemFormat,
-  ItemJSON,
-  ItemString,
-  ItemType,
-  AbstractType,
-  compareCursors,
-  Cursor,
-  createCursorFromTypeOffset,
-  createCursorFromJSON,
-  createAbsolutePositionFromCursor,
-  writeCursor,
-  readCursor,
-  ID,
-  createID,
-  compareIDs,
-  getState,
-  getStates,
-  readStatesAsMap,
-  writeStates,
-  writeModel,
-  readModel,
-  Snapshot,
-  findRootTypeKey,
-  typeArrayToArraySnapshot,
-  typeMapGetSnapshot,
-  iterateDeletedStructs
-} from './internals.js'

src/internals.js

@@ -1,34 +0,0 @@
-export * from './utils/DeleteSet.js'
-export * from './utils/EventHandler.js'
-export * from './utils/ID.js'
-export * from './utils/isParentOf.js'
-export * from './utils/cursor.js'
-export * from './utils/Snapshot.js'
-export * from './utils/StructStore.js'
-export * from './utils/Transaction.js'
-// export * from './utils/UndoManager.js'
-export * from './utils/Y.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/AbstractItem.js'
-export * from './structs/GC.js'
-export * from './structs/ItemBinary.js'
-export * from './structs/ItemDeleted.js'
-export * from './structs/ItemEmbed.js'
-export * from './structs/ItemFormat.js'
-export * from './structs/ItemJSON.js'
-export * from './structs/ItemString.js'
-export * from './structs/ItemType.js'
-
-export * from './utils/encoding.js'

src/structs/AbstractItem.js

@@ -1,642 +0,0 @@
-
-import {
-  readID,
-  createID,
-  writeID,
-  GC,
-  nextID,
-  AbstractStructRef,
-  AbstractStruct,
-  replaceStruct,
-  addStruct,
-  addToDeleteSet,
-  ItemDeleted,
-  findRootTypeKey,
-  compareIDs,
-  getItem,
-  getItemType,
-  getItemCleanEnd,
-  getItemCleanStart,
-  YEvent, StructStore, ID, AbstractType, Y, Transaction // eslint-disable-line
-} from '../internals.js'
-
-import * as error from 'lib0/error.js'
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-import * as maplib from 'lib0/map.js'
-import * as set from 'lib0/set.js'
-import * as binary from 'lib0/binary.js'
-
-/**
- * @param {AbstractItem} left
- * @param {AbstractItem} right
- * @return {boolean} If true, right is removed from the linked list and should be discarded
- */
-export const mergeItemWith = (left, right) => {
-  if (compareIDs(right.origin, left.lastId) && left.right === right && compareIDs(left.rightOrigin, right.rightOrigin)) {
-    left.right = right.right
-    if (left.right !== null) {
-      left.right.left = left
-    }
-    return true
-  }
-  return false
-}
-
-/**
- * Split leftItem into two items
- * @param {Transaction} transaction
- * @param {AbstractItem} leftItem
- * @param {number} diff
- * @return {AbstractItem}
- *
- * @function
- * @private
- */
-export const splitItem = (transaction, leftItem, diff) => {
-  const id = leftItem.id
-  // create rightItem
-  const rightItem = leftItem.copy(
-    createID(id.client, id.clock + diff),
-    leftItem,
-    createID(id.client, id.clock + diff - 1),
-    leftItem.right,
-    leftItem.rightOrigin,
-    leftItem.parent,
-    leftItem.parentSub
-  )
-  if (leftItem.deleted) {
-    rightItem.deleted = true
-  }
-  // update left (do not set leftItem.rightOrigin as it will lead to problems when syncing)
-  leftItem.right = rightItem
-  // update right
-  if (rightItem.right !== null) {
-    rightItem.right.left = rightItem
-  }
-  // right is more specific.
-  transaction._mergeStructs.add(rightItem.id)
-  // update parent._map
-  if (rightItem.parentSub !== null && rightItem.right === null) {
-    rightItem.parent._map.set(rightItem.parentSub, rightItem)
-  }
-  return rightItem
-}
-
-/**
- * Abstract class that represents any content.
- */
-export class AbstractItem extends AbstractStruct {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub) {
-    super(id)
-    /**
-     * The item that was originally to the left of this item.
-     * @type {ID | null}
-     * @readonly
-     */
-    this.origin = origin
-    /**
-     * The item that is currently to the left of this item.
-     * @type {AbstractItem | null}
-     */
-    this.left = left
-    /**
-     * The item that is currently to the right of this item.
-     * @type {AbstractItem | null}
-     */
-    this.right = right
-    /**
-     * The item that was originally to the right of this item.
-     * @readonly
-     * @type {ID | null}
-     */
-    this.rightOrigin = rightOrigin
-    /**
-     * The parent type.
-     * @type {AbstractType<any>}
-     * @readonly
-     */
-    this.parent = parent
-    /**
-     * If the parent refers to this item with some kind of key (e.g. YMap, the
-     * key is specified here. The key is then used to refer to the list in which
-     * to insert this item. If `parentSub = null` type._start is the list in
-     * which to insert to. Otherwise it is `parent._map`.
-     * @type {String | null}
-     * @readonly
-     */
-    this.parentSub = parentSub
-    /**
-     * Whether this item was deleted or not.
-     * @type {Boolean}
-     */
-    this.deleted = false
-    /**
-     * If this type's effect is reundone this type refers to the type that undid
-     * this operation.
-     * @type {AbstractItem | null}
-     */
-    this.redone = null
-  }
-
-  /**
-   * @param {Transaction} transaction
-   * @private
-   */
-  integrate (transaction) {
-    const store = transaction.y.store
-    const id = this.id
-    const parent = this.parent
-    const parentSub = this.parentSub
-    const length = this.length
-    /**
-     * @type {AbstractItem|null}
-     */
-    let o
-    // set o to the first conflicting item
-    if (this.left !== null) {
-      o = this.left.right
-    } else if (parentSub !== null) {
-      o = parent._map.get(parentSub) || null
-      while (o !== null && o.left !== null) {
-        o = o.left
-      }
-    } else {
-      o = parent._start
-    }
-    // TODO: use something like DeleteSet here (a tree implementation would be best)
-    /**
-     * @type {Set<AbstractItem>}
-     */
-    const conflictingItems = new Set()
-    /**
-     * @type {Set<AbstractItem>}
-     */
-    const 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 (compareIDs(this.origin, o.origin)) {
-        // case 1
-        if (o.id.client < id.client) {
-          this.left = o
-          conflictingItems.clear()
-        }
-      } else if (o.origin !== null && itemsBeforeOrigin.has(getItem(store, o.origin))) {
-        // case 2
-        if (o.origin === null || !conflictingItems.has(getItem(store, o.origin))) {
-          this.left = o
-          conflictingItems.clear()
-        }
-      } else {
-        break
-      }
-      o = o.right
-    }
-    // reconnect left/right + update parent map/start if necessary
-    if (this.left !== null) {
-      const right = this.left.right
-      this.right = right
-      this.left.right = this
-    } else {
-      let r
-      if (parentSub !== null) {
-        r = parent._map.get(parentSub) || null
-        while (r !== null && r.left !== null) {
-          r = r.left
-        }
-      } else {
-        r = parent._start
-        parent._start = this
-      }
-      this.right = r
-    }
-    if (this.right !== null) {
-      this.right.left = this
-    } else if (parentSub !== null) {
-      // set as current parent value if right === null and this is parentSub
-      parent._map.set(parentSub, this)
-      if (this.left !== null) {
-        // this is the current attribute value of parent. delete right
-        this.left.delete(transaction)
-      }
-    }
-    // adjust length of parent
-    if (parentSub === null && this.countable && !this.deleted) {
-      parent._length += length
-    }
-    addStruct(store, this)
-    maplib.setIfUndefined(transaction.changed, parent, set.create).add(parentSub)
-    // @ts-ignore
-    if ((parent._item !== null && parent._item.deleted) || (this.right !== null && parentSub !== null)) {
-      // delete if parent is deleted or if this is not the current attribute value of parent
-      this.delete(transaction)
-    }
-  }
-
-  /**
-   * Returns the next non-deleted item
-   * @private
-   */
-  get next () {
-    let n = this.right
-    while (n !== null && n.deleted) {
-      n = n.right
-    }
-    return n
-  }
-
-  /**
-   * Returns the previous non-deleted item
-   * @private
-   */
-  get prev () {
-    let n = this.left
-    while (n !== null && n.deleted) {
-      n = n.left
-    }
-    return n
-  }
-
-  /**
-   * Creates an Item with the same effect as this Item (without position effect)
-   *
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @return {AbstractItem}
-   *
-   * @private
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    throw new Error('unimplemented')
-  }
-
-  /**
-   * Redoes the effect of this operation.
-   *
-   * @param {Transaction} transaction The Yjs instance.
-   * @param {Set<AbstractItem>} redoitems
-   *
-   * @private
-   */
-  redo (transaction, redoitems) {
-    if (this.redone !== null) {
-      return this.redone
-    }
-    /**
-     * @type {any}
-     */
-    let parent = this.parent
-    if (parent === null) {
-      return
-    }
-    let left, right
-    if (this.parentSub === null) {
-      // Is an array item. Insert at the old position
-      left = this.left
-      right = this
-    } else {
-      // Is a map item. Insert as current value
-      left = parent.type._map.get(this.parentSub)
-      right = null
-    }
-    // make sure that parent is redone
-    if (parent._deleted === true && parent.redone === null) {
-      // try to undo parent if it will be undone anyway
-      if (!redoitems.has(parent) || !parent.redo(transaction, redoitems)) {
-        return false
-      }
-    }
-    if (parent.redone !== null) {
-      while (parent.redone !== null) {
-        parent = parent.redone
-      }
-      // find next cloned_redo items
-      while (left !== null) {
-        if (left.redone !== null && left.redone.parent === parent) {
-          left = left.redone
-          break
-        }
-        left = left.left
-      }
-      while (right !== null) {
-        if (right.redone !== null && right.redone.parent === parent) {
-          right = right.redone
-        }
-        right = right.right
-      }
-    }
-    this.redone = this.copy(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, this.parentSub)
-    this.redone.integrate(transaction)
-    return true
-  }
-
-  /**
-   * Computes the last content address of this Item.
-   */
-  get lastId () {
-    return createID(this.id.client, this.id.clock + this.length - 1)
-  }
-
-  /**
-   * Computes the length of this Item.
-   */
-  get length () {
-    return 1
-  }
-
-  /**
-   * Should return false if this Item is some kind of meta information
-   * (e.g. format information).
-   *
-   * * Whether this Item should be addressable via `yarray.get(i)`
-   * * Whether this Item should be counted when computing yarray.length
-   */
-  get countable () {
-    return true
-  }
-
-  /**
-   * Do not call directly. Always split via StructStore!
-   *
-   * Splits this Item so that another Item can be inserted in-between.
-   * This must be overwritten if _length > 1
-   * Returns right part after split
-   *
-   * (see {@link ItemJSON}/{@link ItemString} for implementation)
-   *
-   * Does not integrate the struct, nor store it in struct store.
-   *
-   * This method should only be cally by StructStore.
-   *
-   * @param {Transaction} transaction
-   * @param {number} diff
-   * @return {AbstractItem}
-   *
-   * @private
-   */
-  splitAt (transaction, diff) {
-    throw new Error('unimplemented')
-  }
-
-  /**
-   * Mark this Item as deleted.
-   *
-   * @param {Transaction} transaction
-   */
-  delete (transaction) {
-    if (!this.deleted) {
-      const parent = this.parent
-      // adjust the length of parent
-      if (this.countable && this.parentSub === null) {
-        parent._length -= this.length
-      }
-      this.deleted = true
-      addToDeleteSet(transaction.deleteSet, this.id, this.length)
-      maplib.setIfUndefined(transaction.changed, parent, set.create).add(this.parentSub)
-    }
-  }
-
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   *
-   * @private
-   */
-  gcChildren (transaction, store) { }
-
-  /**
-   * @todo remove transaction param
-   *
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {boolean} parentGCd
-   *
-   * @private
-   */
-  gc (transaction, store, parentGCd) {
-    if (!this.deleted) {
-      throw error.unexpectedCase()
-    }
-    let r
-    if (parentGCd) {
-      r = new GC(this.id, this.length)
-    } else {
-      r = new ItemDeleted(this.id, this.left, this.origin, this.right, this.rightOrigin, this.parent, this.parentSub, this.length)
-      if (r.right !== null) {
-        r.right.left = r
-      } else if (r.parentSub !== null) {
-        r.parent._map.set(r.parentSub, r)
-      }
-      if (r.left !== null) {
-        r.left.right = r
-      } else if (r.parentSub === null) {
-        r.parent._start = r
-      }
-    }
-    replaceStruct(store, this, r)
-  }
-
-  /**
-   * @return {Array<any>}
-   */
-  getContent () {
-    throw error.methodUnimplemented()
-  }
-
-  /**
-   * Transform the properties of this type to binary and write it to an
-   * BinaryEncoder.
-   *
-   * This is called when this Item is sent to a remote peer.
-   *
-   * @param {encoding.Encoder} encoder The encoder to write data to.
-   * @param {number} offset
-   * @param {number} encodingRef
-   *
-   * @private
-   */
-  write (encoder, offset, encodingRef) {
-    const origin = offset > 0 ? createID(this.id.client, this.id.clock + offset - 1) : this.origin
-    const rightOrigin = this.rightOrigin
-    const parentSub = this.parentSub
-    const info = (encodingRef & binary.BITS5) |
-      (origin === null ? 0 : binary.BIT8) | // origin is defined
-      (rightOrigin === null ? 0 : binary.BIT7) | // right origin is defined
-      (parentSub === null ? 0 : binary.BIT6) // parentSub is non-null
-    encoding.writeUint8(encoder, info)
-    if (origin !== null) {
-      writeID(encoder, origin)
-    }
-    if (rightOrigin !== null) {
-      writeID(encoder, rightOrigin)
-    }
-    if (origin === null && rightOrigin === null) {
-      const parent = this.parent
-      if (parent._item === null) {
-        // parent type on y._map
-        // find the correct key
-        // @ts-ignore we know that y exists
-        const ykey = findRootTypeKey(parent)
-        encoding.writeVarUint(encoder, 1) // write parentYKey
-        encoding.writeVarString(encoder, ykey)
-      } else {
-        encoding.writeVarUint(encoder, 0) // write parent id
-        // @ts-ignore _item is defined because parent is integrated
-        writeID(encoder, parent._item.id)
-      }
-      if (parentSub !== null) {
-        encoding.writeVarString(encoder, parentSub)
-      }
-    }
-  }
-}
-
-/**
- * @private
- */
-export class AbstractItemRef extends AbstractStructRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(id)
-    /**
-     * The item that was originally to the left of this item.
-     * @type {ID | null}
-     */
-    this.left = (info & binary.BIT8) === binary.BIT8 ? readID(decoder) : null
-    /**
-     * The item that was originally to the right of this item.
-     * @type {ID | null}
-     */
-    this.right = (info & binary.BIT7) === binary.BIT7 ? readID(decoder) : null
-    const canCopyParentInfo = (info & (binary.BIT7 | binary.BIT8)) === 0
-    const hasParentYKey = canCopyParentInfo ? decoding.readVarUint(decoder) === 1 : false
-    /**
-     * If parent = null and neither left nor right are defined, then we know that `parent` is child of `y`
-     * and we read the next string as parentYKey.
-     * It indicates how we store/retrieve parent from `y.share`
-     * @type {string|null}
-     */
-    this.parentYKey = canCopyParentInfo && hasParentYKey ? decoding.readVarString(decoder) : null
-    /**
-     * The parent type.
-     * @type {ID | null}
-     */
-    this.parent = canCopyParentInfo && !hasParentYKey ? readID(decoder) : null
-    /**
-     * If the parent refers to this item with some kind of key (e.g. YMap, the
-     * key is specified here. The key is then used to refer to the list in which
-     * to insert this item. If `parentSub = null` type._start is the list in
-     * which to insert to. Otherwise it is `parent._map`.
-     * @type {String | null}
-     */
-    this.parentSub = canCopyParentInfo && (info & binary.BIT6) === binary.BIT6 ? decoding.readVarString(decoder) : null
-    const missing = this._missing
-    if (this.left !== null) {
-      missing.push(this.left)
-    }
-    if (this.right !== null) {
-      missing.push(this.right)
-    }
-    if (this.parent !== null) {
-      missing.push(this.parent)
-    }
-  }
-}
-
-/**
- * @param {AbstractItemRef} item
- * @param {number} offset
- *
- * @function
- * @private
- */
-export const changeItemRefOffset = (item, offset) => {
-  item.id = createID(item.id.client, item.id.clock + offset)
-  item.left = createID(item.id.client, item.id.clock - 1)
-}
-
-export class ItemParams {
-  /**
-   * @param {AbstractItem?} left
-   * @param {AbstractItem?} right
-   * @param {AbstractType<YEvent>?} parent
-   * @param {string|null} parentSub
-   */
-  constructor (left, right, parent, parentSub) {
-    this.left = left
-    this.right = right
-    this.parent = parent
-    this.parentSub = parentSub
-  }
-}
-
-/**
- * Outsourcing some of the logic of computing the item params from a received struct.
- * If parent === null, it is expected to gc the read struct. Otherwise apply it.
- *
- * @param {Transaction} transaction
- * @param {StructStore} store
- * @param {ID|null} leftid
- * @param {ID|null} rightid
- * @param {ID|null} parentid
- * @param {string|null} parentSub
- * @param {string|null} parentYKey
- * @return {ItemParams}
- *
- * @private
- * @function
- */
-export const computeItemParams = (transaction, store, leftid, rightid, parentid, parentSub, parentYKey) => {
-  const left = leftid === null ? null : getItemCleanEnd(transaction, store, leftid)
-  const right = rightid === null ? null : getItemCleanStart(transaction, store, rightid)
-  let parent = null
-  if (parentid !== null) {
-    const parentItem = getItemType(store, parentid)
-    switch (parentItem.constructor) {
-      case ItemDeleted:
-      case GC:
-        break
-      default:
-        if (!parentItem.deleted && (left === null || left.constructor !== GC) && (right === null || right.constructor !== GC)) {
-          parent = parentItem.type
-        }
-    }
-  } else if (parentYKey !== null) {
-    parent = transaction.y.get(parentYKey)
-  } else if (left !== null) {
-    if (left.constructor !== GC) {
-      parent = left.parent
-      parentSub = left.parentSub
-    }
-  } else if (right !== null) {
-    if (right.constructor !== GC) {
-      parent = right.parent
-      parentSub = right.parentSub
-    }
-  } else {
-    throw error.unexpectedCase()
-  }
-  return new ItemParams(left, right, parent, parentSub)
-}

src/structs/AbstractStruct.js

@@ -1,98 +0,0 @@
-
-import {
-  Y, StructStore, ID, Transaction // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js' // eslint-disable-line
-import * as error from 'lib0/error.js'
-
-/**
- * @private
- */
-export class AbstractStruct {
-  /**
-   * @param {ID} id
-   */
-  constructor (id) {
-    /**
-     * The uniqe identifier of this struct.
-     * @type {ID}
-     * @readonly
-     */
-    this.id = id
-    this.deleted = false
-  }
-  /**
-   * 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
-  }
-  /**
-   * @type {number}
-   */
-  get length () {
-    throw error.methodUnimplemented()
-  }
-  /**
-   * @param {encoding.Encoder} encoder The encoder to write data to.
-   * @param {number} offset
-   * @param {number} encodingRef
-   * @private
-   */
-  write (encoder, offset, encodingRef) {
-    throw error.methodUnimplemented()
-  }
-  /**
-   * @param {Transaction} transaction
-   */
-  integrate (transaction) {
-    throw error.methodUnimplemented()
-  }
-}
-
-/**
- * @private
- */
-export class AbstractStructRef {
-  /**
-   * @param {ID} id
-   */
-  constructor (id) {
-    /**
-     * @type {Array<ID>}
-     */
-    this._missing = []
-    /**
-     * The uniqe identifier of this type.
-     * @type {ID}
-     */
-    this.id = id
-  }
-  /**
-   * @param {Transaction} transaction
-   * @return {Array<ID|null>}
-   */
-  getMissing (transaction) {
-    return this._missing
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {AbstractStruct}
-   */
-  toStruct (transaction, store, offset) {
-    throw error.methodUnimplemented()
-  }
-  /**
-   * @type {number}
-   */
-  get length () {
-    return 1
-  }
-}

src/structs/GC.js

@@ -1,105 +0,0 @@
-
-import {
-  AbstractStructRef,
-  AbstractStruct,
-  createID,
-  addStruct,
-  Y, StructStore, Transaction, ID // eslint-disable-line
-} from '../internals.js'
-
-import * as decoding from 'lib0/decoding.js'
-import * as encoding from 'lib0/encoding.js'
-
-export const structGCRefNumber = 0
-
-/**
- * @private
- */
-export class GC extends AbstractStruct {
-  /**
-   * @param {ID} id
-   * @param {number} length
-   */
-  constructor (id, length) {
-    super(id)
-    /**
-     * @type {number}
-     */
-    this._len = length
-    this.deleted = true
-  }
-
-  get length () {
-    return this._len
-  }
-
-  delete () {}
-
-  /**
-   * @param {AbstractStruct} right
-   * @return {boolean}
-   */
-  mergeWith (right) {
-    this._len += right.length
-    return true
-  }
-
-  /**
-   * @param {Transaction} transaction
-   */
-  integrate (transaction) {
-    addStruct(transaction.y.store, this)
-  }
-
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    encoding.writeUint8(encoder, structGCRefNumber)
-    encoding.writeVarUint(encoder, this._len - offset)
-  }
-}
-
-/**
- * @private
- */
-export class GCRef extends AbstractStructRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(id)
-    /**
-     * @type {number}
-     */
-    this._len = decoding.readVarUint(decoder)
-  }
-  get length () {
-    return this._len
-  }
-  missing () {
-    return [
-      createID(this.id.client, this.id.clock - 1)
-    ]
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {GC}
-   */
-  toStruct (transaction, store, offset) {
-    if (offset > 0) {
-      // @ts-ignore
-      this.id = createID(this.id.client, this.id.clock + offset)
-      this._len = this._len - offset
-    }
-    return new GC(
-      this.id,
-      this._len
-    )
-  }
-}

src/structs/ItemBinary.js

@@ -1,98 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  GC,
-  StructStore, Transaction, AbstractType, ID // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * @private
- */
-export const structBinaryRefNumber = 1
-
-/**
- * @private
- */
-export class ItemBinary extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {ArrayBuffer} content
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, content) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    this.content = content
-  }
-  getContent () {
-    return [this.content]
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemBinary(id, left, origin, right, rightOrigin, parent, parentSub, this.content)
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structBinaryRefNumber)
-    encoding.writePayload(encoder, this.content)
-  }
-}
-
-/**
- * @private
- */
-export class ItemBinaryRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    /**
-     * @type {ArrayBuffer}
-     */
-    this.content = decoding.readPayload(decoder)
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemBinary|GC}
-   */
-  toStruct (transaction, store, offset) {
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemBinary(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.content
-      )
-  }
-}

src/structs/ItemDeleted.js

@@ -1,156 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  changeItemRefOffset,
-  GC,
-  splitItem,
-  addToDeleteSet,
-  mergeItemWith,
-  Y, StructStore, Transaction, ID, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * @private
- */
-export const structDeletedRefNumber = 2
-
-/**
- * @private
- */
-export class ItemDeleted extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {number} length
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, length) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    this._len = length
-    this.deleted = true
-  }
-  get length () {
-    return this._len
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemDeleted(id, left, origin, right, rightOrigin, parent, parentSub, this.length)
-  }
-  /**
-   * @param {Transaction} transaction
-   */
-  integrate (transaction) {
-    super.integrate(transaction)
-    addToDeleteSet(transaction.deleteSet, this.id, this.length)
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {number} diff
-   */
-  splitAt (transaction, diff) {
-    /**
-     * @type {ItemDeleted}
-     */
-    // @ts-ignore
-    const right = splitItem(transaction, this, diff)
-    right._len -= diff
-    this._len = diff
-    return right
-  }
-  /**
-   * @param {ItemDeleted} right
-   * @return {boolean}
-   */
-  mergeWith (right) {
-    if (mergeItemWith(this, right)) {
-      this._len += right._len
-      return true
-    }
-    return false
-  }
-
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {boolean} parentGCd
-   *
-   * @private
-   */
-  gc (transaction, store, parentGCd) {
-    if (parentGCd) {
-      super.gc(transaction, store, parentGCd)
-    }
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structDeletedRefNumber)
-    encoding.writeVarUint(encoder, this.length - offset)
-  }
-}
-
-/**
- * @private
- */
-export class ItemDeletedRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    /**
-     * @type {number}
-     */
-    this.len = decoding.readVarUint(decoder)
-  }
-  get length () {
-    return this.len
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemDeleted|GC}
-   */
-  toStruct (transaction, store, offset) {
-    if (offset > 0) {
-      changeItemRefOffset(this, offset)
-      this.len = this.len - offset
-    }
-
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemDeleted(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.len
-      )
-  }
-}

src/structs/ItemEmbed.js

@@ -1,95 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  GC,
-  Transaction, StructStore, ID, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * @private
- */
-export const structEmbedRefNumber = 3
-
-/**
- * @private
- */
-export class ItemEmbed extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {Object} embed
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, embed) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    this.embed = embed
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemEmbed(id, left, origin, right, rightOrigin, parent, parentSub, this.embed)
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structEmbedRefNumber)
-    encoding.writeVarString(encoder, JSON.stringify(this.embed))
-  }
-}
-
-/**
- * @private
- */
-export class ItemEmbedRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    /**
-     * @type {ArrayBuffer}
-     */
-    this.embed = JSON.parse(decoding.readVarString(decoder))
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemEmbed|GC}
-   */
-  toStruct (transaction, store, offset) {
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemEmbed(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.embed
-      )
-  }
-}

src/structs/ItemFormat.js

@@ -1,103 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  GC,
-  Transaction, StructStore, ID, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * @private
- */
-export const structFormatRefNumber = 4
-
-/**
- * @private
- */
-export class ItemFormat extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {string} key
-   * @param {any} value
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, key, value) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    this.key = key
-    this.value = value
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemFormat(id, left, origin, right, rightOrigin, parent, parentSub, this.key, this.value)
-  }
-  get countable () {
-    return false
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structFormatRefNumber)
-    encoding.writeVarString(encoder, this.key)
-    encoding.writeVarString(encoder, JSON.stringify(this.value))
-  }
-}
-
-/**
- * @private
- */
-export class ItemFormatRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    /**
-     * @type {string}
-     */
-    this.key = decoding.readVarString(decoder)
-    this.value = JSON.parse(decoding.readVarString(decoder))
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemFormat|GC}
-   */
-  toStruct (transaction, store, offset) {
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemFormat(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.key,
-        this.value
-      )
-  }
-}

src/structs/ItemJSON.js

@@ -1,153 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  splitItem,
-  changeItemRefOffset,
-  GC,
-  mergeItemWith,
-  Transaction, StructStore, Y, ID, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * @private
- */
-export const structJSONRefNumber = 5
-
-/**
- * @private
- */
-export class ItemJSON extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {Array<any>} content
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, content) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    /**
-     * @type {Array<any>}
-     */
-    this.content = content
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemJSON(id, left, origin, right, rightOrigin, parent, parentSub, this.content)
-  }
-  get length () {
-    return this.content.length
-  }
-  getContent () {
-    return this.content
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {number} diff
-   */
-  splitAt (transaction, diff) {
-    /**
-     * @type {ItemJSON}
-     */
-    // @ts-ignore
-    const right = splitItem(transaction, this, diff)
-    right.content = this.content.splice(diff)
-    return right
-  }
-  /**
-   * @param {ItemJSON} right
-   * @return {boolean}
-   */
-  mergeWith (right) {
-    if (mergeItemWith(this, right)) {
-      this.content = this.content.concat(right.content)
-      return true
-    }
-    return false
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structJSONRefNumber)
-    const len = this.content.length
-    encoding.writeVarUint(encoder, len - offset)
-    for (let i = offset; i < len; i++) {
-      const c = this.content[i]
-      encoding.writeVarString(encoder, c === undefined ? 'undefined' : JSON.stringify(c))
-    }
-  }
-}
-
-/**
- * @private
- */
-export class ItemJSONRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    const len = decoding.readVarUint(decoder)
-    const cs = []
-    for (let i = 0; i < len; i++) {
-      const c = decoding.readVarString(decoder)
-      if (c === 'undefined') {
-        cs.push(undefined)
-      } else {
-        cs.push(JSON.parse(c))
-      }
-    }
-    /**
-     * @type {Array<any>}
-     */
-    this.content = cs
-  }
-  get length () {
-    return this.content.length
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemJSON|GC}
-   */
-  toStruct (transaction, store, offset) {
-    if (offset > 0) {
-      changeItemRefOffset(this, offset)
-      this.content = this.content.slice(offset)
-    }
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemJSON(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.content
-      )
-  }
-}

src/structs/ItemString.js

@@ -1,138 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  splitItem,
-  changeItemRefOffset,
-  GC,
-  mergeItemWith,
-  Transaction, StructStore, Y, ID, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-export const structStringRefNumber = 6
-
-/**
- * @private
- */
-export class ItemString extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {string} string
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, string) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    /**
-     * @type {string}
-     */
-    this.string = string
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemString(id, left, origin, right, rightOrigin, parent, parentSub, this.string)
-  }
-  getContent () {
-    return this.string.split('')
-  }
-  get length () {
-    return this.string.length
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {number} diff
-   * @return {ItemString}
-   */
-  splitAt (transaction, diff) {
-    /**
-     * @type {ItemString}
-     */
-    // @ts-ignore
-    const right = splitItem(transaction, this, diff)
-    right.string = this.string.slice(diff)
-    this.string = this.string.slice(0, diff)
-    return right
-  }
-  /**
-   * @param {ItemString} right
-   * @return {boolean}
-   */
-  mergeWith (right) {
-    if (mergeItemWith(this, right)) {
-      this.string += right.string
-      return true
-    }
-    return false
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structStringRefNumber)
-    encoding.writeVarString(encoder, offset === 0 ? this.string : this.string.slice(offset))
-  }
-}
-
-/**
- * @private
- */
-export class ItemStringRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    /**
-     * @type {string}
-     */
-    this.string = decoding.readVarString(decoder)
-  }
-  get length () {
-    return this.string.length
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemString|GC}
-   */
-  toStruct (transaction, store, offset) {
-    if (offset > 0) {
-      changeItemRefOffset(this, offset)
-      this.string = this.string.slice(offset)
-    }
-
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemString(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.string
-      )
-  }
-}

src/structs/ItemType.js

@@ -1,201 +0,0 @@
-
-import {
-  AbstractItem,
-  AbstractItemRef,
-  computeItemParams,
-  readYArray,
-  readYMap,
-  readYText,
-  readYXmlElement,
-  readYXmlFragment,
-  readYXmlHook,
-  readYXmlText,
-  StructStore, Y, GC, Transaction, ID, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js' // eslint-disable-line
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * @private
- */
-export const structTypeRefNumber = 7
-
-/**
- * @type {Array<function(decoding.Decoder):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 ItemType extends AbstractItem {
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @param {AbstractType<any>} type
-   */
-  constructor (id, left, origin, right, rightOrigin, parent, parentSub, type) {
-    super(id, left, origin, right, rightOrigin, parent, parentSub)
-    this.type = type
-  }
-
-  getContent () {
-    return [this.type]
-  }
-  /**
-   * @param {ID} id
-   * @param {AbstractItem | null} left
-   * @param {ID | null} origin
-   * @param {AbstractItem | null} right
-   * @param {ID | null} rightOrigin
-   * @param {AbstractType<any>} parent
-   * @param {string | null} parentSub
-   * @return {ItemType}
-   */
-  copy (id, left, origin, right, rightOrigin, parent, parentSub) {
-    return new ItemType(id, left, origin, right, rightOrigin, parent, parentSub, this.type._copy())
-  }
-  /**
-   * @param {Transaction} transaction
-   */
-  integrate (transaction) {
-    super.integrate(transaction)
-    this.type._integrate(transaction.y, this)
-  }
-  /**
-   * @param {encoding.Encoder} encoder
-   * @param {number} offset
-   */
-  write (encoder, offset) {
-    super.write(encoder, offset, structTypeRefNumber)
-    this.type._write(encoder)
-  }
-  /**
-   * Mark this Item as deleted.
-   *
-   * @param {Transaction} transaction The Yjs instance
-   * @private
-   */
-  delete (transaction) {
-    if (!this.deleted) {
-      super.delete(transaction)
-      let item = this.type._start
-      while (item !== null) {
-        if (!item.deleted) {
-          item.delete(transaction)
-        } else {
-          // Whis 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.add(item.id)
-        }
-        item = item.right
-      }
-      this.type._map.forEach(item => {
-        if (!item.deleted) {
-          item.delete(transaction)
-        } else {
-          // same as above
-          transaction._mergeStructs.add(item.id)
-        }
-      })
-      transaction.changed.delete(this.type)
-      transaction.changedParentTypes.delete(this.type)
-    }
-  }
-
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   */
-  gcChildren (transaction, store) {
-    let item = this.type._start
-    while (item !== null) {
-      item.gc(transaction, store, true)
-      item = item.right
-    }
-    this.type._start = null
-    this.type._map.forEach(item => {
-      while (item !== null) {
-        item.gc(transaction, store, true)
-        // @ts-ignore
-        item = item.left
-      }
-    })
-    this._map = new Map()
-  }
-
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {boolean} parentGCd
-   */
-  gc (transaction, store, parentGCd) {
-    this.gcChildren(transaction, store)
-    super.gc(transaction, store, parentGCd)
-  }
-}
-
-/**
- * @private
- */
-export class ItemTypeRef extends AbstractItemRef {
-  /**
-   * @param {decoding.Decoder} decoder
-   * @param {ID} id
-   * @param {number} info
-   */
-  constructor (decoder, id, info) {
-    super(decoder, id, info)
-    const typeRef = decoding.readVarUint(decoder)
-    /**
-     * @type {AbstractType<any>}
-     */
-    this.type = typeRefs[typeRef](decoder)
-  }
-  /**
-   * @param {Transaction} transaction
-   * @param {StructStore} store
-   * @param {number} offset
-   * @return {ItemType|GC}
-   */
-  toStruct (transaction, store, offset) {
-    const { left, right, parent, parentSub } = computeItemParams(transaction, store, this.left, this.right, this.parent, this.parentSub, this.parentYKey)
-    return parent === null
-      ? new GC(this.id, this.length)
-      : new ItemType(
-        this.id,
-        left,
-        this.left,
-        right,
-        this.right,
-        parent,
-        parentSub,
-        this.type
-      )
-  }
-}

src/types/AbstractType.js

@@ -1,600 +0,0 @@
-
-import {
-  removeEventHandlerListener,
-  callEventHandlerListeners,
-  addEventHandlerListener,
-  createEventHandler,
-  ItemType,
-  nextID,
-  isVisible,
-  ItemJSON,
-  ItemBinary,
-  createID,
-  getItemCleanStart,
-  Y, Snapshot, Transaction, EventHandler, YEvent, AbstractItem, // eslint-disable-line
-} from '../internals.js'
-
-import * as map from 'lib0/map.js'
-import * as iterator from 'lib0/iterator.js'
-import * as error from 'lib0/error.js'
-import * as encoding from 'lib0/encoding.js' // eslint-disable-line
-
-/**
- * Call event listeners with an event. This will also add an event to all
- * parents (for `.observeDeep` handlers).
- * @private
- *
- * @template EventType
- * @param {AbstractType<EventType>} type
- * @param {Transaction} transaction
- * @param {EventType} event
- */
-export const callTypeObservers = (type, transaction, event) => {
-  callEventHandlerListeners(type._eH, event, transaction)
-  const changedParentTypes = transaction.changedParentTypes
-  while (true) {
-    // @ts-ignore
-    map.setIfUndefined(changedParentTypes, type, () => []).push(event)
-    if (type._item === null) {
-      break
-    }
-    type = type._item.parent
-  }
-}
-
-/**
- * @template EventType
- * Abstract Yjs Type class
- */
-export class AbstractType {
-  constructor () {
-    /**
-     * @type {ItemType|null}
-     */
-    this._item = null
-    /**
-     * @private
-     * @type {Map<string,AbstractItem>}
-     */
-    this._map = new Map()
-    /**
-     * @private
-     * @type {AbstractItem|null}
-     */
-    this._start = null
-    /**
-     * @private
-     * @type {Y|null}
-     */
-    this._y = null
-    this._length = 0
-    /**
-     * Event handlers
-     * @type {EventHandler<EventType,Transaction>}
-     */
-    this._eH = createEventHandler()
-    /**
-     * Deep event handlers
-     * @type {EventHandler<Array<YEvent>,Transaction>}
-     */
-    this._dEH = createEventHandler()
-  }
-
-  /**
-   * Integrate this type into the Yjs instance.
-   *
-   * * Save this struct in the os
-   * * This type is sent to other client
-   * * Observer functions are fired
-   *
-   * @param {Y} y The Yjs instance
-   * @param {ItemType|null} item
-   * @private
-   */
-  _integrate (y, item) {
-    this._y = y
-    this._item = item
-  }
-
-  /**
-   * @return {AbstractType<EventType>}
-   * @private
-   */
-  _copy () {
-    throw new Error('unimplemented')
-  }
-
-  /**
-   * @param {encoding.Encoder} encoder
-   * @private
-   */
-  _write (encoder) { }
-
-  /**
-   * The first non-deleted item
-   */
-  get _first () {
-    let n = this._start
-    while (n !== null && n.deleted) {
-      n = n.right
-    }
-    return n
-  }
-
-  /**
-   * Creates YEvent and calls all type observers.
-   * Must be implemented by each type.
-   *
-   * @param {Transaction} transaction
-   * @param {Set<null|string>} parentSubs Keys changed on this type. `null` if list was modified.
-   *
-   * @private
-   */
-  _callObserver (transaction, parentSubs) { /* skip if no type is specified */ }
-
-  /**
-   * Observe all events that are created on this type.
-   *
-   * @param {function(EventType, Transaction):void} f Observer function
-   */
-  observe (f) {
-    addEventHandlerListener(this._eH, f)
-  }
-
-  /**
-   * Observe all events that are created by this type and its children.
-   *
-   * @param {function(Array<YEvent>,Transaction):void} f Observer function
-   */
-  observeDeep (f) {
-    addEventHandlerListener(this._dEH, f)
-  }
-
-  /**
-   * Unregister an observer function.
-   *
-   * @param {function(EventType,Transaction):void} f Observer function
-   */
-  unobserve (f) {
-    removeEventHandlerListener(this._eH, f)
-  }
-
-  /**
-   * Unregister an observer function.
-   *
-   * @param {function(Array<YEvent>,Transaction):void} f Observer function
-   */
-  unobserveDeep (f) {
-    removeEventHandlerListener(this._dEH, f)
-  }
-
-  /**
-   * @abstract
-   * @return {Object | Array | number | string}
-   */
-  toJSON () {}
-}
-
-/**
- * @param {AbstractType<any>} type
- * @return {Array<any>}
- *
- * @private
- * @function
- */
-export const typeArrayToArray = type => {
-  const cs = []
-  let n = type._start
-  while (n !== null) {
-    if (n.countable && !n.deleted) {
-      const c = n.getContent()
-      for (let i = 0; i < c.length; i++) {
-        cs.push(c[i])
-      }
-    }
-    n = n.right
-  }
-  return cs
-}
-
-/**
- * @param {AbstractType<any>} type
- * @param {Snapshot} snapshot
- * @return {Array<any>}
- *
- * @private
- * @function
- */
-export const typeArrayToArraySnapshot = (type, snapshot) => {
-  const cs = []
-  let n = type._start
-  while (n !== null) {
-    if (n.countable && isVisible(n, snapshot)) {
-      const c = n.getContent()
-      for (let i = 0; i < c.length; i++) {
-        cs.push(c[i])
-      }
-    }
-    n = n.right
-  }
-  return cs
-}
-
-/**
- * Executes a provided function on once on overy element of this YArray.
- *
- * @param {AbstractType<any>} type
- * @param {function(any,number,any):void} f A function to execute on every element of this YArray.
- *
- * @private
- * @function
- */
-export const typeArrayForEach = (type, f) => {
-  let index = 0
-  let n = type._start
-  while (n !== null) {
-    if (n.countable && !n.deleted) {
-      const c = n.getContent()
-      for (let i = 0; i < c.length; i++) {
-        f(c[i], index++, type)
-      }
-    }
-    n = n.right
-  }
-}
-
-/**
- * @template C,R
- * @param {AbstractType<any>} type
- * @param {function(C,number,AbstractType<any>):R} f
- * @return {Array<R>}
- *
- * @private
- * @function
- */
-export const typeArrayMap = (type, f) => {
-  /**
-   * @type {Array<any>}
-   */
-  const result = []
-  typeArrayForEach(type, (c, i) => {
-    result.push(f(c, i, type))
-  })
-  return result
-}
-
-/**
- * @param {AbstractType<any>} type
- * @return {IterableIterator<any>}
- *
- * @private
- * @function
- */
-export const typeArrayCreateIterator = type => {
-  let n = type._start
-  /**
-   * @type {Array<any>|null}
-   */
-  let currentContent = null
-  let currentContentIndex = 0
-  return {
-    [Symbol.iterator] () {
-      return this
-    },
-    next: () => {
-      // find some content
-      if (currentContent === null) {
-        while (n !== null && n.deleted) {
-          n = n.right
-        }
-      }
-      // check if we reached the end, no need to check currentContent, because it does not exist
-      if (n === null) {
-        return {
-          done: true,
-          value: undefined
-        }
-      }
-      // currentContent could exist from the last iteration
-      if (currentContent === null) {
-        // we found n, so we can set currentContent
-        currentContent = n.getContent()
-        currentContentIndex = 0
-        n = n.right // we used the content of n, now iterate to next
-      }
-      const value = currentContent[currentContentIndex++]
-      // check if we need to empty currentContent
-      if (currentContent.length <= currentContentIndex) {
-        currentContent = null
-      }
-      return {
-        done: false,
-        value
-      }
-    }
-  }
-}
-
-/**
- * Executes a provided function on once on overy element of this YArray.
- * Operates on a snapshotted state of the document.
- *
- * @param {AbstractType<any>} type
- * @param {function(any,number,AbstractType<any>):void} f A function to execute on every element of this YArray.
- * @param {Snapshot} snapshot
- *
- * @private
- * @function
- */
-export const typeArrayForEachSnapshot = (type, f, snapshot) => {
-  let index = 0
-  let n = type._start
-  while (n !== null) {
-    if (n.countable && isVisible(n, snapshot)) {
-      const c = n.getContent()
-      for (let i = 0; i < c.length; i++) {
-        f(c[i], index++, type)
-      }
-    }
-    n = n.right
-  }
-}
-
-/**
- * @param {AbstractType<any>} type
- * @param {number} index
- * @return {any}
- *
- * @private
- * @function
- */
-export const typeArrayGet = (type, index) => {
-  for (let n = type._start; n !== null; n = n.right) {
-    if (!n.deleted && n.countable) {
-      if (index < n.length) {
-        return n.getContent()[index]
-      }
-      index -= n.length
-    }
-  }
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {AbstractItem?} referenceItem
- * @param {Array<Object<string,any>|Array<any>|number|string|ArrayBuffer>} content
- *
- * @private
- * @function
- */
-export const typeArrayInsertGenericsAfter = (transaction, parent, referenceItem, content) => {
-  let left = referenceItem
-  const right = referenceItem === null ? parent._start : referenceItem.right
-  /**
-   * @type {Array<Object|Array|number>}
-   */
-  let jsonContent = []
-  const packJsonContent = () => {
-    if (jsonContent.length > 0) {
-      left = new ItemJSON(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, jsonContent)
-      left.integrate(transaction)
-      jsonContent = []
-    }
-  }
-  content.forEach(c => {
-    switch (c.constructor) {
-      case Number:
-      case Object:
-      case Array:
-      case String:
-        jsonContent.push(c)
-        break
-      default:
-        packJsonContent()
-        switch (c.constructor) {
-          case ArrayBuffer:
-            // @ts-ignore c is definitely an ArrayBuffer
-            left = new ItemBinary(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, c)
-            // @ts-ignore
-            left.integrate(transaction)
-            break
-          default:
-            if (c instanceof AbstractType) {
-              left = new ItemType(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, c)
-              left.integrate(transaction)
-            } else {
-              throw new Error('Unexpected content type in insert operation')
-            }
-        }
-    }
-  })
-  packJsonContent()
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {number} index
- * @param {Array<Object<string,any>|Array<any>|number|string|ArrayBuffer>} content
- *
- * @private
- * @function
- */
-export const typeArrayInsertGenerics = (transaction, parent, index, content) => {
-  if (index === 0) {
-    return typeArrayInsertGenericsAfter(transaction, parent, null, content)
-  }
-  let n = parent._start
-  for (; n !== null; n = n.right) {
-    if (!n.deleted && n.countable) {
-      if (index <= n.length) {
-        if (index < n.length) {
-          // insert in-between
-          getItemCleanStart(transaction, transaction.y.store, createID(n.id.client, n.id.clock + index))
-        }
-        break
-      }
-      index -= n.length
-    }
-  }
-  return typeArrayInsertGenericsAfter(transaction, parent, n, content)
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {number} index
- * @param {number} length
- *
- * @private
- * @function
- */
-export const typeArrayDelete = (transaction, parent, index, length) => {
-  if (length === 0) { return }
-  let n = parent._start
-  // compute the first item to be deleted
-  for (; n !== null && index > 0; n = n.right) {
-    if (!n.deleted && n.countable) {
-      if (index < n.length) {
-        getItemCleanStart(transaction, transaction.y.store, createID(n.id.client, n.id.clock + index))
-      }
-      index -= n.length
-    }
-  }
-  // delete all items until done
-  while (length > 0 && n !== null) {
-    if (!n.deleted) {
-      if (length < n.length) {
-        getItemCleanStart(transaction, transaction.y.store, createID(n.id.client, n.id.clock + length))
-      }
-      n.delete(transaction)
-      length -= n.length
-    }
-    n = n.right
-  }
-  if (length > 0) {
-    throw error.create('array length exceeded')
-  }
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {string} key
- *
- * @private
- * @function
- */
-export const typeMapDelete = (transaction, parent, key) => {
-  const c = parent._map.get(key)
-  if (c !== undefined) {
-    c.delete(transaction)
-  }
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {string} key
- * @param {Object|number|Array<any>|string|ArrayBuffer|AbstractType<any>} value
- *
- * @private
- * @function
- */
-export const typeMapSet = (transaction, parent, key, value) => {
-  const left = parent._map.get(key) || null
-  if (value == null) {
-    new ItemJSON(nextID(transaction), left, left === null ? null : left.lastId, null, null, parent, key, [value]).integrate(transaction)
-    return
-  }
-  switch (value.constructor) {
-    case Number:
-    case Object:
-    case Array:
-    case String:
-      new ItemJSON(nextID(transaction), left, left === null ? null : left.lastId, null, null, parent, key, [value]).integrate(transaction)
-      break
-    case ArrayBuffer:
-      new ItemBinary(nextID(transaction), left, left === null ? null : left.lastId, null, null, parent, key, value).integrate(transaction)
-      break
-    default:
-      if (value instanceof AbstractType) {
-        new ItemType(nextID(transaction), left, left === null ? null : left.lastId, null, null, parent, key, value).integrate(transaction)
-      } else {
-        throw new Error('Unexpected content type')
-      }
-  }
-}
-
-/**
- * @param {AbstractType<any>} parent
- * @param {string} key
- * @return {Object<string,any>|number|Array<any>|string|ArrayBuffer|AbstractType<any>|undefined}
- *
- * @private
- * @function
- */
-export const typeMapGet = (parent, key) => {
-  const val = parent._map.get(key)
-  return val !== undefined && !val.deleted ? val.getContent()[0] : undefined
-}
-
-/**
- * @param {AbstractType<any>} parent
- * @return {Object<string,Object<string,any>|number|Array<any>|string|ArrayBuffer|AbstractType<any>|undefined>}
- *
- * @private
- * @function
- */
-export const typeMapGetAll = (parent) => {
-  /**
-   * @type {Object<string,any>}
-   */
-  let res = {}
-  for (const [key, value] of parent._map) {
-    if (!value.deleted) {
-      res[key] = value.getContent()[value.length - 1]
-    }
-  }
-  return res
-}
-
-/**
- * @param {AbstractType<any>} parent
- * @param {string} key
- * @return {boolean}
- *
- * @private
- * @function
- */
-export const typeMapHas = (parent, key) => {
-  const val = parent._map.get(key)
-  return val !== undefined && !val.deleted
-}
-
-/**
- * @param {AbstractType<any>} parent
- * @param {string} key
- * @param {Snapshot} snapshot
- * @return {Object<string,any>|number|Array<any>|string|ArrayBuffer|AbstractType<any>|undefined}
- *
- * @private
- * @function
- */
-export const typeMapGetSnapshot = (parent, key, snapshot) => {
-  let v = parent._map.get(key) || null
-  while (v !== null && (!snapshot.sm.has(v.id.client) || v.id.clock >= (snapshot.sm.get(v.id.client) || 0))) {
-    v = v.left
-  }
-  return v !== null && isVisible(v, snapshot) ? v.getContent()[v.length - 1] : undefined
-}
-
-/**
- * @param {Map<string,AbstractItem>} map
- * @return {IterableIterator<Array<any>>}
- *
- * @private
- * @function
- */
-export const createMapIterator = map => iterator.iteratorFilter(map.entries(), /** @param {any} entry */ entry => !entry[1].deleted)

src/types/YArray.js

@@ -1,213 +0,0 @@
-/**
- * @module YArray
- */
-
-import {
-  YEvent,
-  AbstractType,
-  typeArrayGet,
-  typeArrayToArray,
-  typeArrayForEach,
-  typeArrayCreateIterator,
-  typeArrayInsertGenerics,
-  typeArrayDelete,
-  typeArrayMap,
-  YArrayRefID,
-  callTypeObservers,
-  transact,
-  Y, Transaction, ItemType, // eslint-disable-line
-} from '../internals.js'
-
-import * as decoding from 'lib0/decoding.js' // eslint-disable-line
-import * as encoding from 'lib0/encoding.js'
-
-/**
- * Event that describes the changes on a YArray
- * @template T
- */
-export class YArrayEvent extends YEvent {
-  /**
-   * @param {YArray<T>} yarray The changed type
-   * @param {Transaction} transaction The transaction object
-   */
-  constructor (yarray, transaction) {
-    super(yarray, transaction)
-    this._transaction = transaction
-  }
-}
-
-/**
- * A shared Array implementation.
- * @template T
- * @extends AbstractType<YArrayEvent<T>>
- * @implements {IterableIterator<T>}
- */
-export class YArray extends AbstractType {
-  constructor () {
-    super()
-    /**
-     * @type {Array<any>?}
-     * @private
-     */
-    this._prelimContent = []
-  }
-  /**
-   * Integrate this type into the Yjs instance.
-   *
-   * * Save this struct in the os
-   * * This type is sent to other client
-   * * Observer functions are fired
-   *
-   * @param {Y} y The Yjs instance
-   * @param {ItemType} item
-   *
-   * @private
-   */
-  _integrate (y, item) {
-    super._integrate(y, item)
-    // @ts-ignore
-    this.insert(0, this._prelimContent)
-    this._prelimContent = null
-  }
-  get length () {
-    return this._prelimContent === null ? this._length : this._prelimContent.length
-  }
-  /**
-   * Creates YArrayEvent and calls observers.
-   *
-   * @param {Transaction} transaction
-   * @param {Set<null|string>} parentSubs Keys changed on this type. `null` if list was modified.
-   *
-   * @private
-   */
-  _callObserver (transaction, parentSubs) {
-    callTypeObservers(this, transaction, new YArrayEvent(this, transaction))
-  }
-
-  /**
-   * Inserts new content at an index.
-   *
-   * Important: This function expects an array of content. Not just a content
-   * object. The reason for this "weirdness" is that inserting several elements
-   * is very efficient when it is done as a single operation.
-   *
-   * @example
-   *  // Insert character 'a' at position 0
-   *  yarray.insert(0, ['a'])
-   *  // Insert numbers 1, 2 at position 1
-   *  yarray.insert(1, [1, 2])
-   *
-   * @param {number} index The index to insert content at.
-   * @param {Array<T>} content The array of content
-   */
-  insert (index, content) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeArrayInsertGenerics(transaction, this, index, content)
-      })
-    } else {
-      // @ts-ignore _prelimContent is defined because this is not yet integrated
-      this._prelimContent.splice(index, 0, ...content)
-    }
-  }
-
-  /**
-   * Appends content to this YArray.
-   *
-   * @param {Array<T>} content Array of content to append.
-   */
-  push (content) {
-    this.insert(this.length, content)
-  }
-
-  /**
-   * Deletes elements starting from an index.
-   *
-   * @param {number} index Index at which to start deleting elements
-   * @param {number} length The number of elements to remove. Defaults to 1.
-   */
-  delete (index, length = 1) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeArrayDelete(transaction, this, index, length)
-      })
-    } else {
-      // @ts-ignore _prelimContent is defined because this is not yet integrated
-      this._prelimContent.splice(index, length)
-    }
-  }
-
-  /**
-   * Returns the i-th element from a YArray.
-   *
-   * @param {number} index The index of the element to return from the YArray
-   * @return {T}
-   */
-  get (index) {
-    return typeArrayGet(this, index)
-  }
-
-  /**
-   * Transforms this YArray to a JavaScript Array.
-   *
-   * @return {Array<T>}
-   */
-  toArray () {
-    return typeArrayToArray(this)
-  }
-
-  /**
-   * Transforms this Shared Type to a JSON object.
-   *
-   * @return {Array<any>}
-   */
-  toJSON () {
-    return this.map(c => c instanceof AbstractType ? c.toJSON() : c)
-  }
-
-  /**
-   * Returns an Array with the result of calling a provided function on every
-   * element of this YArray.
-   *
-   * @template T,M
-   * @param {function(T,number,YArray<T>):M} f Function that produces an element of the new Array
-   * @return {Array<M>} A new array with each element being the result of the
-   *                 callback function
-   */
-  map (f) {
-    // @ts-ignore
-    return typeArrayMap(this, f)
-  }
-
-  /**
-   * Executes a provided function on once on overy element of this YArray.
-   *
-   * @param {function(T,number,YArray<T>):void} f A function to execute on every element of this YArray.
-   */
-  forEach (f) {
-    typeArrayForEach(this, f)
-  }
-
-  /**
-   * @return {IterableIterator<T>}
-   */
-  [Symbol.iterator] () {
-    return typeArrayCreateIterator(this)
-  }
-
-  /**
-   * @param {encoding.Encoder} encoder
-   * @private
-   */
-  _write (encoder) {
-    encoding.writeVarUint(encoder, YArrayRefID)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- *
- * @private
- * @function
- */
-export const readYArray = decoder => new YArray()

src/types/YMap.js

@@ -1,212 +0,0 @@
-
-/**
- * @module YMap
- */
-
-import {
-  YEvent,
-  AbstractType,
-  typeMapDelete,
-  typeMapSet,
-  typeMapGet,
-  typeMapHas,
-  createMapIterator,
-  YMapRefID,
-  callTypeObservers,
-  transact,
-  Y, Transaction, ItemType, // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js' // eslint-disable-line
-import * as iterator from 'lib0/iterator.js'
-
-/**
- * @template T
- * Event that describes the changes on a YMap.
- */
-export class YMapEvent extends YEvent {
-  /**
-   * @param {YMap<T>} ymap The YArray that changed.
-   * @param {Transaction} transaction
-   * @param {Set<any>} subs The keys that changed.
-   */
-  constructor (ymap, transaction, subs) {
-    super(ymap, transaction)
-    this.keysChanged = subs
-  }
-}
-
-/**
- * @template T number|string|Object|Array|ArrayBuffer
- * A shared Map implementation.
- *
- * @extends AbstractType<YMapEvent<T>>
- * @implements {IterableIterator}
- */
-export class YMap extends AbstractType {
-  constructor () {
-    super()
-    /**
-     * @type {Map<string,any>?}
-     * @private
-     */
-    this._prelimContent = new Map()
-  }
-  /**
-   * Integrate this type into the Yjs instance.
-   *
-   * * Save this struct in the os
-   * * This type is sent to other client
-   * * Observer functions are fired
-   *
-   * @param {Y} y The Yjs instance
-   * @param {ItemType} item
-   *
-   * @private
-   */
-  _integrate (y, item) {
-    super._integrate(y, item)
-    // @ts-ignore
-    for (let [key, value] of this._prelimContent) {
-      this.set(key, value)
-    }
-    this._prelimContent = null
-  }
-  /**
-   * Creates YMapEvent and calls observers.
-   *
-   * @param {Transaction} transaction
-   * @param {Set<null|string>} parentSubs Keys changed on this type. `null` if list was modified.
-   *
-   * @private
-   */
-  _callObserver (transaction, parentSubs) {
-    callTypeObservers(this, transaction, new YMapEvent(this, transaction, parentSubs))
-  }
-
-  /**
-   * Transforms this Shared Type to a JSON object.
-   *
-   * @return {Object<string,T>}
-   */
-  toJSON () {
-    /**
-     * @type {Object<string,T>}
-     */
-    const map = {}
-    for (let [key, item] of this._map) {
-      if (!item.deleted) {
-        const v = item.getContent()[0]
-        map[key] = v instanceof AbstractType ? v.toJSON() : v
-      }
-    }
-    return map
-  }
-
-  /**
-   * Returns the keys for each element in the YMap Type.
-   *
-   * @return {Iterator<string>}
-   */
-  keys () {
-    return iterator.iteratorMap(createMapIterator(this._map), /** @param {any} v */ v => v[0])
-  }
-
-  /**
-   * Returns the keys for each element in the YMap Type.
-   *
-   * @return {Iterator<string>}
-   */
-  values () {
-    return iterator.iteratorMap(createMapIterator(this._map), /** @param {any} v */ v => v[1].getContent()[v[1].length - 1])
-  }
-
-  /**
-   * Returns an Iterator of [key, value] pairs
-   *
-   * @return {IterableIterator<any>}
-   */
-  entries () {
-    return iterator.iteratorMap(createMapIterator(this._map), /** @param {any} v */ v => [v[0], v[1].getContent()[v[1].length - 1]])
-  }
-
-  /**
-   * @return {IterableIterator<T>}
-   */
-  [Symbol.iterator] () {
-    return this.entries()
-  }
-
-  /**
-   * Remove a specified element from this YMap.
-   *
-   * @param {string} key The key of the element to remove.
-   */
-  delete (key) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeMapDelete(transaction, this, key)
-      })
-    } else {
-      // @ts-ignore
-      this._prelimContent.delete(key)
-    }
-  }
-
-  /**
-   * Adds or updates an element with a specified key and value.
-   *
-   * @param {string} key The key of the element to add to this YMap
-   * @param {T} value The value of the element to add
-   */
-  set (key, value) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeMapSet(transaction, this, key, value)
-      })
-    } else {
-      // @ts-ignore
-      this._prelimContent.set(key, value)
-    }
-    return value
-  }
-
-  /**
-   * Returns a specified element from this YMap.
-   *
-   * @param {string} key
-   * @return {T|undefined}
-   */
-  get (key) {
-    // @ts-ignore
-    return typeMapGet(this, key)
-  }
-
-  /**
-   * Returns a boolean indicating whether the specified key exists or not.
-   *
-   * @param {string} key The key to test.
-   * @return {boolean}
-   */
-  has (key) {
-    return typeMapHas(this, key)
-  }
-
-  /**
-   * @param {encoding.Encoder} encoder
-   *
-   * @private
-   */
-  _write (encoder) {
-    encoding.writeVarUint(encoder, YMapRefID)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- *
- * @private
- * @function
- */
-export const readYMap = decoder => new YMap()

src/types/YText.js

@@ -1,911 +0,0 @@
-
-/**
- * @module YText
- */
-
-import {
-  YEvent,
-  ItemEmbed,
-  ItemString,
-  ItemFormat,
-  AbstractType,
-  nextID,
-  createID,
-  getItemCleanStart,
-  isVisible,
-  YTextRefID,
-  callTypeObservers,
-  transact,
-  Y, ItemType, AbstractItem, Snapshot, StructStore, Transaction // eslint-disable-line
-} from '../internals.js'
-
-import * as decoding from 'lib0/decoding.js' // eslint-disable-line
-import * as encoding from 'lib0/encoding.js'
-
-export class ItemListPosition {
-  /**
-   * @param {AbstractItem|null} left
-   * @param {AbstractItem|null} right
-   */
-  constructor (left, right) {
-    this.left = left
-    this.right = right
-  }
-}
-
-export class ItemTextListPosition extends ItemListPosition {
-  /**
-   * @param {AbstractItem|null} left
-   * @param {AbstractItem|null} right
-   * @param {Map<string,any>} currentAttributes
-   */
-  constructor (left, right, currentAttributes) {
-    super(left, right)
-    this.currentAttributes = currentAttributes
-  }
-}
-
-export class ItemInsertionResult extends ItemListPosition {
-  /**
-   * @param {AbstractItem|null} left
-   * @param {AbstractItem|null} right
-   * @param {Map<string,any>} negatedAttributes
-   */
-  constructor (left, right, negatedAttributes) {
-    super(left, right)
-    this.negatedAttributes = negatedAttributes
-  }
-}
-
-/**
- * @param {Transaction} transaction
- * @param {StructStore} store
- * @param {Map<string,any>} currentAttributes
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {number} count
- * @return {ItemTextListPosition}
- *
- * @private
- * @function
- */
-const findNextPosition = (transaction, store, currentAttributes, left, right, count) => {
-  while (right !== null && count > 0) {
-    switch (right.constructor) {
-      case ItemEmbed:
-      case ItemString:
-        if (!right.deleted) {
-          if (count < right.length) {
-            // split right
-            getItemCleanStart(transaction, store, createID(right.id.client, right.id.clock + count))
-          }
-          count -= right.length
-        }
-        break
-      case ItemFormat:
-        if (!right.deleted) {
-          // @ts-ignore right is ItemFormat
-          updateCurrentAttributes(currentAttributes, right)
-        }
-        break
-    }
-    left = right
-    right = right.right
-  }
-  return new ItemTextListPosition(left, right, currentAttributes)
-}
-
-/**
- * @param {Transaction} transaction
- * @param {StructStore} store
- * @param {AbstractType<any>} parent
- * @param {number} index
- * @return {ItemTextListPosition}
- *
- * @private
- * @function
- */
-const findPosition = (transaction, store, parent, index) => {
-  let currentAttributes = new Map()
-  let left = null
-  let right = parent._start
-  return findNextPosition(transaction, store, currentAttributes, left, right, index)
-}
-
-/**
- * Negate applied formats
- *
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {Map<string,any>} negatedAttributes
- * @return {ItemListPosition}
- *
- * @private
- * @function
- */
-const insertNegatedAttributes = (transaction, parent, left, right, negatedAttributes) => {
-  // check if we really need to remove attributes
-  while (
-    right !== null && (
-      right.deleted === true || (
-        right.constructor === ItemFormat &&
-        // @ts-ignore right is ItemFormat
-        (negatedAttributes.get(right.key) === right.value)
-      )
-    )
-  ) {
-    if (!right.deleted) {
-      // @ts-ignore right is ItemFormat
-      negatedAttributes.delete(right.key)
-    }
-    left = right
-    right = right.right
-  }
-  for (let [key, val] of negatedAttributes) {
-    left = new ItemFormat(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, key, val)
-    left.integrate(transaction)
-  }
-  return { left, right }
-}
-
-/**
- * @param {Map<string,any>} currentAttributes
- * @param {ItemFormat} item
- *
- * @private
- * @function
- */
-const updateCurrentAttributes = (currentAttributes, item) => {
-  const value = item.value
-  const key = item.key
-  if (value === null) {
-    currentAttributes.delete(key)
-  } else {
-    currentAttributes.set(key, value)
-  }
-}
-
-/**
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {Map<string,any>} currentAttributes
- * @param {Object<string,any>} attributes
- * @return {ItemListPosition}
- *
- * @private
- * @function
- */
-const minimizeAttributeChanges = (left, right, currentAttributes, attributes) => {
-  // go right while attributes[right.key] === right.value (or right is deleted)
-  while (true) {
-    if (right === null) {
-      break
-    } else if (right.deleted) {
-      // continue
-    // @ts-ignore right is ItemFormat
-    } else if (right.constructor === ItemFormat && (attributes[right.key] || null) === right.value) {
-      // found a format, update currentAttributes and continue
-      // @ts-ignore right is ItemFormat
-      updateCurrentAttributes(currentAttributes, right)
-    } else {
-      break
-    }
-    left = right
-    right = right.right
-  }
-  return new ItemListPosition(left, right)
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {Map<string,any>} currentAttributes
- * @param {Object<string,any>} attributes
- * @return {ItemInsertionResult}
- *
- * @private
- * @function
- **/
-const insertAttributes = (transaction, parent, left, right, currentAttributes, attributes) => {
-  const negatedAttributes = new Map()
-  // insert format-start items
-  for (let key in attributes) {
-    const val = attributes[key]
-    const currentVal = currentAttributes.get(key) || null
-    if (currentVal !== val) {
-      // save negated attribute (set null if currentVal undefined)
-      negatedAttributes.set(key, currentVal)
-      left = new ItemFormat(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, key, val)
-      left.integrate(transaction)
-    }
-  }
-  return new ItemInsertionResult(left, right, negatedAttributes)
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {Map<string,any>} currentAttributes
- * @param {string} text
- * @param {Object<string,any>} attributes
- * @return {ItemListPosition}
- *
- * @private
- * @function
- **/
-const insertText = (transaction, parent, left, right, currentAttributes, text, attributes) => {
-  for (let [key] of currentAttributes) {
-    if (attributes[key] === undefined) {
-      attributes[key] = null
-    }
-  }
-  const minPos = minimizeAttributeChanges(left, right, currentAttributes, attributes)
-  const insertPos = insertAttributes(transaction, parent, minPos.left, minPos.right, currentAttributes, attributes)
-  left = insertPos.left
-  right = insertPos.right
-  // insert content
-  if (text.constructor === String) {
-    left = new ItemString(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, text)
-  } else {
-    left = new ItemEmbed(nextID(transaction), left, left === null ? null : left.lastId, right, right === null ? null : right.id, parent, null, text)
-  }
-  left.integrate(transaction)
-  return insertNegatedAttributes(transaction, parent, left, insertPos.right, insertPos.negatedAttributes)
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractType<any>} parent
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {Map<string,any>} currentAttributes
- * @param {number} length
- * @param {Object<string,any>} attributes
- * @return {ItemListPosition}
- *
- * @private
- * @function
- */
-const formatText = (transaction, parent, left, right, currentAttributes, length, attributes) => {
-  const minPos = minimizeAttributeChanges(left, right, currentAttributes, attributes)
-  const insertPos = insertAttributes(transaction, parent, minPos.left, minPos.right, currentAttributes, attributes)
-  const negatedAttributes = insertPos.negatedAttributes
-  left = insertPos.left
-  right = insertPos.right
-  // iterate until first non-format or null is found
-  // delete all formats with attributes[format.key] != null
-  while (length > 0 && right !== null) {
-    if (right.deleted === false) {
-      switch (right.constructor) {
-        case ItemFormat:
-          // @ts-ignore right is ItemFormat
-          const attr = attributes[right.key]
-          if (attr !== undefined) {
-            // @ts-ignore right is ItemFormat
-            if (attr === right.value) {
-              // @ts-ignore right is ItemFormat
-              negatedAttributes.delete(right.key)
-            } else {
-              // @ts-ignore right is ItemFormat
-              negatedAttributes.set(right.key, right.value)
-            }
-            right.delete(transaction)
-          }
-          // @ts-ignore right is ItemFormat
-          updateCurrentAttributes(currentAttributes, right)
-          break
-        case ItemEmbed:
-        case ItemString:
-          if (length < right.length) {
-            getItemCleanStart(transaction, transaction.y.store, createID(right.id.client, right.id.clock + length))
-          }
-          length -= right.length
-          break
-      }
-    }
-    left = right
-    right = right.right
-  }
-  return insertNegatedAttributes(transaction, parent, left, right, negatedAttributes)
-}
-
-/**
- * @param {Transaction} transaction
- * @param {AbstractItem|null} left
- * @param {AbstractItem|null} right
- * @param {Map<string,any>} currentAttributes
- * @param {number} length
- * @return {ItemListPosition}
- *
- * @private
- * @function
- */
-const deleteText = (transaction, left, right, currentAttributes, length) => {
-  while (length > 0 && right !== null) {
-    if (right.deleted === false) {
-      switch (right.constructor) {
-        case ItemFormat:
-          // @ts-ignore right is ItemFormat
-          updateCurrentAttributes(currentAttributes, right)
-          break
-        case ItemEmbed:
-        case ItemString:
-          if (length < right.length) {
-            getItemCleanStart(transaction, transaction.y.store, createID(right.id.client, right.id.clock + length))
-          }
-          length -= right.length
-          right.delete(transaction)
-          break
-      }
-    }
-    left = right
-    right = right.right
-  }
-  return { left, right }
-}
-
-/**
- * The Quill Delta format represents changes on a text document with
- * formatting information. For mor information visit {@link https://quilljs.com/docs/delta/|Quill Delta}
- *
- * @example
- *   {
- *     ops: [
- *       { insert: 'Gandalf', attributes: { bold: true } },
- *       { insert: ' the ' },
- *       { insert: 'Grey', attributes: { color: '#cccccc' } }
- *     ]
- *   }
- *
- */
-
-/**
-  * Attributes that can be assigned to a selection of text.
-  *
-  * @example
-  *   {
-  *     bold: true,
-  *     font-size: '40px'
-  *   }
-  *
-  * @typedef {Object} TextAttributes
-  */
-
-/**
- * @typedef {Object} DeltaItem
- * @property {number|undefined} DeltaItem.delete
- * @property {number|undefined} DeltaItem.retain
- * @property {string|undefined} DeltaItem.string
- * @property {Object<string,any>} DeltaItem.attributes
- */
-
-/**
- * Event that describes the changes on a YText type.
- */
-class YTextEvent extends YEvent {
-  /**
-   * @param {YText} ytext
-   * @param {Transaction} transaction
-   */
-  constructor (ytext, transaction) {
-    super(ytext, transaction)
-    /**
-     * @private
-     * @type {Array<DeltaItem>|null}
-     */
-    this._delta = null
-  }
-  /**
-   * Compute the changes in the delta format.
-   * A {@link https://quilljs.com/docs/delta/|Quill Delta}) that represents the changes on the document.
-   *
-   * @type {Array<DeltaItem>}
-   *
-   * @public
-   */
-  get delta () {
-    if (this._delta === null) {
-      const y = this.target._y
-      // @ts-ignore
-      transact(y, transaction => {
-        /**
-         * @type {Array<DeltaItem>}
-         */
-        const delta = []
-        const currentAttributes = new Map() // saves all current attributes for insert
-        const oldAttributes = new Map()
-        let item = this.target._start
-        /**
-         * @type {string?}
-         */
-        let action = null
-        /**
-         * @type {Object<string,any>}
-         */
-        let attributes = {} // counts added or removed new attributes for retain
-        let insert = ''
-        let retain = 0
-        let deleteLen = 0
-        this._delta = delta
-        const addOp = () => {
-          if (action !== null) {
-            /**
-             * @type {any}
-             */
-            let op
-            switch (action) {
-              case 'delete':
-                op = { delete: deleteLen }
-                deleteLen = 0
-                break
-              case 'insert':
-                op = { insert }
-                if (currentAttributes.size > 0) {
-                  op.attributes = {}
-                  for (let [key, value] of currentAttributes) {
-                    if (value !== null) {
-                      op.attributes[key] = value
-                    }
-                  }
-                }
-                insert = ''
-                break
-              case 'retain':
-                op = { retain }
-                if (Object.keys(attributes).length > 0) {
-                  op.attributes = {}
-                  for (let key in attributes) {
-                    op.attributes[key] = attributes[key]
-                  }
-                }
-                retain = 0
-                break
-            }
-            delta.push(op)
-            action = null
-          }
-        }
-        while (item !== null) {
-          switch (item.constructor) {
-            case ItemEmbed:
-              if (this.adds(item)) {
-                addOp()
-                action = 'insert'
-                // @ts-ignore item is ItemFormat
-                insert = item.embed
-                addOp()
-              } else if (this.deletes(item)) {
-                if (action !== 'delete') {
-                  addOp()
-                  action = 'delete'
-                }
-                deleteLen += 1
-              } else if (!item.deleted) {
-                if (action !== 'retain') {
-                  addOp()
-                  action = 'retain'
-                }
-                retain += 1
-              }
-              break
-            case ItemString:
-              if (this.adds(item)) {
-                if (action !== 'insert') {
-                  addOp()
-                  action = 'insert'
-                }
-                // @ts-ignore
-                insert += item.string
-              } else if (this.deletes(item)) {
-                if (action !== 'delete') {
-                  addOp()
-                  action = 'delete'
-                }
-                deleteLen += item.length
-              } else if (!item.deleted) {
-                if (action !== 'retain') {
-                  addOp()
-                  action = 'retain'
-                }
-                retain += item.length
-              }
-              break
-            case ItemFormat:
-              if (this.adds(item)) {
-                // @ts-ignore item is ItemFormat
-                const curVal = currentAttributes.get(item.key) || null
-                // @ts-ignore item is ItemFormat
-                if (curVal !== item.value) {
-                  if (action === 'retain') {
-                    addOp()
-                  }
-                  // @ts-ignore item is ItemFormat
-                  if (item.value === (oldAttributes.get(item.key) || null)) {
-                    // @ts-ignore item is ItemFormat
-                    delete attributes[item.key]
-                  } else {
-                    // @ts-ignore item is ItemFormat
-                    attributes[item.key] = item.value
-                  }
-                } else {
-                  item.delete(transaction)
-                }
-              } else if (this.deletes(item)) {
-                // @ts-ignore item is ItemFormat
-                oldAttributes.set(item.key, item.value)
-                // @ts-ignore item is ItemFormat
-                const curVal = currentAttributes.get(item.key) || null
-                // @ts-ignore item is ItemFormat
-                if (curVal !== item.value) {
-                  if (action === 'retain') {
-                    addOp()
-                  }
-                  // @ts-ignore item is ItemFormat
-                  attributes[item.key] = curVal
-                }
-              } else if (!item.deleted) {
-                // @ts-ignore item is ItemFormat
-                oldAttributes.set(item.key, item.value)
-                // @ts-ignore item is ItemFormat
-                const attr = attributes[item.key]
-                if (attr !== undefined) {
-                  // @ts-ignore item is ItemFormat
-                  if (attr !== item.value) {
-                    if (action === 'retain') {
-                      addOp()
-                    }
-                    // @ts-ignore item is ItemFormat
-                    if (item.value === null) {
-                      // @ts-ignore item is ItemFormat
-                      attributes[item.key] = item.value
-                    } else {
-                      // @ts-ignore item is ItemFormat
-                      delete attributes[item.key]
-                    }
-                  } else {
-                    item.delete(transaction)
-                  }
-                }
-              }
-              if (!item.deleted) {
-                if (action === 'insert') {
-                  addOp()
-                }
-                // @ts-ignore item is ItemFormat
-                updateCurrentAttributes(currentAttributes, item)
-              }
-              break
-          }
-          item = item.right
-        }
-        addOp()
-        while (this._delta.length > 0) {
-          let lastOp = this._delta[this._delta.length - 1]
-          if (lastOp.retain !== undefined && lastOp.attributes === undefined) {
-            // retain delta's if they don't assign attributes
-            this._delta.pop()
-          } else {
-            break
-          }
-        }
-      })
-    }
-    // @ts-ignore _delta is defined above
-    return this._delta
-  }
-}
-
-/**
- * Type that represents text with formatting information.
- *
- * This type replaces y-richtext as this implementation is able to handle
- * block formats (format information on a paragraph), embeds (complex elements
- * like pictures and videos), and text formats (**bold**, *italic*).
- *
- * @extends AbstractType<YTextEvent>
- */
-export class YText extends AbstractType {
-  /**
-   * @param {String} [string] The initial value of the YText.
-   */
-  constructor (string) {
-    super()
-    /**
-     * Array of pending operations on this type
-     * @type {Array<function():void>?}
-     * @private
-     */
-    this._pending = string !== undefined ? [() => this.insert(0, string)] : []
-  }
-
-  get length () {
-    return this._length
-  }
-
-  /**
-   * @param {Y} y
-   * @param {ItemType} item
-   *
-   * @private
-   */
-  _integrate (y, item) {
-    super._integrate(y, item)
-    try {
-      // @ts-ignore this._prelimContent is still defined
-      this._pending.forEach(f => f())
-    } catch (e) {
-      console.error(e)
-    }
-    this._pending = null
-  }
-
-  /**
-   * Creates YTextEvent and calls observers.
-   *
-   * @param {Transaction} transaction
-   * @param {Set<null|string>} parentSubs Keys changed on this type. `null` if list was modified.
-   *
-   * @private
-   */
-  _callObserver (transaction, parentSubs) {
-    callTypeObservers(this, transaction, new YTextEvent(this, transaction))
-  }
-
-  /**
-   * Returns the unformatted string representation of this YText type.
-   *
-   * @public
-   */
-  toString () {
-    let str = ''
-    /**
-     * @type {AbstractItem|null}
-     */
-    let n = this._start
-    while (n !== null) {
-      if (!n.deleted && n.countable && n.constructor === ItemString) {
-        // @ts-ignore
-        str += n.string
-      }
-      n = n.right
-    }
-    return str
-  }
-
-  /**
-   * Apply a {@link Delta} on this shared YText type.
-   *
-   * @param {any} delta The changes to apply on this element.
-   *
-   * @public
-   */
-  applyDelta (delta) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        /**
-         * @type {ItemListPosition}
-         */
-        let pos = new ItemListPosition(null, this._start)
-        const currentAttributes = new Map()
-        for (let i = 0; i < delta.length; i++) {
-          const op = delta[i]
-          if (op.insert !== undefined) {
-            pos = insertText(transaction, this, pos.left, pos.right, currentAttributes, op.insert, op.attributes || {})
-          } else if (op.retain !== undefined) {
-            pos = formatText(transaction, this, pos.left, pos.right, currentAttributes, op.retain, op.attributes || {})
-          } else if (op.delete !== undefined) {
-            pos = deleteText(transaction, pos.left, pos.right, currentAttributes, op.delete)
-          }
-        }
-      })
-    } else {
-      // @ts-ignore
-      this._pending.push(() => this.applyDelta(delta))
-    }
-  }
-
-  /**
-   * Returns the Delta representation of this YText type.
-   *
-   * @param {Snapshot} [snapshot]
-   * @param {Snapshot} [prevSnapshot]
-   * @return {any} The Delta representation of this type.
-   *
-   * @public
-   */
-  toDelta (snapshot, prevSnapshot) {
-    /**
-     * @type{Array<any>}
-     */
-    const ops = []
-    const currentAttributes = new Map()
-    let str = ''
-    /**
-     * @type {AbstractItem|null}
-     */
-    // @ts-ignore
-    let n = this._start
-    function packStr () {
-      if (str.length > 0) {
-        // pack str with attributes to ops
-        /**
-         * @type {Object<string,any>}
-         */
-        const attributes = {}
-        let addAttributes = false
-        for (let [key, value] of currentAttributes) {
-          addAttributes = true
-          attributes[key] = value
-        }
-        /**
-         * @type {Object<string,any>}
-         */
-        const op = { insert: str }
-        if (addAttributes) {
-          op.attributes = attributes
-        }
-        ops.push(op)
-        str = ''
-      }
-    }
-    while (n !== null) {
-      if (isVisible(n, snapshot) || (prevSnapshot !== undefined && isVisible(n, prevSnapshot))) {
-        switch (n.constructor) {
-          case ItemString:
-            const cur = currentAttributes.get('ychange')
-            if (snapshot !== undefined && !isVisible(n, snapshot)) {
-              if (cur === undefined || cur.user !== n.id.client || cur.state !== 'removed') {
-                packStr()
-                currentAttributes.set('ychange', { user: n.id.client, state: 'removed' })
-              }
-            } else if (prevSnapshot !== undefined && !isVisible(n, prevSnapshot)) {
-              if (cur === undefined || cur.user !== n.id.client || cur.state !== 'added') {
-                packStr()
-                currentAttributes.set('ychange', { user: n.id.client, state: 'added' })
-              }
-            } else if (cur !== undefined) {
-              packStr()
-              currentAttributes.delete('ychange')
-            }
-            // @ts-ignore
-            str += n.string
-            break
-          case ItemFormat:
-            packStr()
-            // @ts-ignore
-            updateCurrentAttributes(currentAttributes, n)
-            break
-        }
-      }
-      n = n.right
-    }
-    packStr()
-    return ops
-  }
-
-  /**
-   * Insert text at a given index.
-   *
-   * @param {number} index The index at which to start inserting.
-   * @param {String} text The text to insert at the specified position.
-   * @param {TextAttributes} attributes Optionally define some formatting
-   *                                    information to apply on the inserted
-   *                                    Text.
-   * @public
-   */
-  insert (index, text, attributes = {}) {
-    if (text.length <= 0) {
-      return
-    }
-    const y = this._y
-    if (y !== null) {
-      transact(y, transaction => {
-        const { left, right, currentAttributes } = findPosition(transaction, y.store, this, index)
-        insertText(transaction, this, left, right, currentAttributes, text, attributes)
-      })
-    } else {
-      // @ts-ignore
-      this._pending.push(() => this.insert(index, text, attributes))
-    }
-  }
-
-  /**
-   * Inserts an embed at a index.
-   *
-   * @param {number} index The index to insert the embed at.
-   * @param {Object} embed The Object that represents the embed.
-   * @param {TextAttributes} attributes Attribute information to apply on the
-   *                                    embed
-   *
-   * @public
-   */
-  insertEmbed (index, embed, attributes = {}) {
-    if (embed.constructor !== Object) {
-      throw new Error('Embed must be an Object')
-    }
-    const y = this._y
-    if (y !== null) {
-      transact(y, transaction => {
-        const { left, right, currentAttributes } = findPosition(transaction, y.store, this, index)
-        insertText(transaction, this, left, right, currentAttributes, embed, attributes)
-      })
-    } else {
-      // @ts-ignore
-      this._pending.push(() => this.insertEmbed(index, embed, attributes))
-    }
-  }
-
-  /**
-   * Deletes text starting from an index.
-   *
-   * @param {number} index Index at which to start deleting.
-   * @param {number} length The number of characters to remove. Defaults to 1.
-   *
-   * @public
-   */
-  delete (index, length) {
-    if (length === 0) {
-      return
-    }
-    const y = this._y
-    if (y !== null) {
-      transact(y, transaction => {
-        const { left, right, currentAttributes } = findPosition(transaction, y.store, this, index)
-        deleteText(transaction, left, right, currentAttributes, length)
-      })
-    } else {
-      // @ts-ignore
-      this._pending.push(() => this.delete(index, length))
-    }
-  }
-
-  /**
-   * Assigns properties to a range of text.
-   *
-   * @param {number} index The position where to start formatting.
-   * @param {number} length The amount of characters to assign properties to.
-   * @param {TextAttributes} attributes Attribute information to apply on the
-   *                                    text.
-   *
-   * @public
-   */
-  format (index, length, attributes) {
-    const y = this._y
-    if (y !== null) {
-      transact(y, transaction => {
-        let { left, right, currentAttributes } = findPosition(transaction, y.store, this, index)
-        if (right === null) {
-          return
-        }
-        formatText(transaction, this, left, right, currentAttributes, length, attributes)
-      })
-    } else {
-      // @ts-ignore
-      this._pending.push(() => this.format(index, length, attributes))
-    }
-  }
-
-  /**
-   * @param {encoding.Encoder} encoder
-   *
-   * @private
-   */
-  _write (encoder) {
-    encoding.writeVarUint(encoder, YTextRefID)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @return {YText}
- *
- * @private
- * @function
- */
-export const readYText = decoder => new YText()

src/types/YXmlElement.js

@@ -1,210 +0,0 @@
-
-import {
-  YXmlFragment,
-  transact,
-  typeMapDelete,
-  typeMapSet,
-  typeMapGet,
-  typeMapGetAll,
-  typeArrayForEach,
-  YXmlElementRefID,
-  Snapshot, Y, ItemType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * An YXmlElement imitates the behavior of a
- * {@link https://developer.mozilla.org/en-US/docs/Web/API/Element|Dom Element}.
- *
- * * An YXmlElement has attributes (key value pairs)
- * * An YXmlElement has childElements that must inherit from YXmlElement
- */
-export class YXmlElement extends YXmlFragment {
-  constructor (nodeName = 'UNDEFINED') {
-    super()
-    this.nodeName = nodeName.toUpperCase()
-    /**
-     * @type {Map<string, any>|null}
-     * @private
-     */
-    this._prelimAttrs = new Map()
-  }
-
-  /**
-   * Integrate this type into the Yjs instance.
-   *
-   * * Save this struct in the os
-   * * This type is sent to other client
-   * * Observer functions are fired
-   *
-   * @param {Y} y The Yjs instance
-   * @param {ItemType} item
-   * @private
-   */
-  _integrate (y, item) {
-    super._integrate(y, item)
-    // @ts-ignore
-    this.insert(0, this._prelimContent)
-    this._prelimContent = null
-    // @ts-ignore
-    this._prelimAttrs.forEach((value, key) => {
-      this.setAttribute(key, value)
-    })
-    this._prelimContent = null
-  }
-
-  /**
-   * Creates an Item with the same effect as this Item (without position effect)
-   *
-   * @return {YXmlElement}
-   * @private
-   */
-  _copy () {
-    return new YXmlElement(this.nodeName)
-  }
-
-  /**
-   * Returns the XML serialization of this YXmlElement.
-   * The attributes are ordered by attribute-name, so you can easily use this
-   * method to compare YXmlElements
-   *
-   * @return {string} The string representation of this type.
-   *
-   * @public
-   */
-  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}>`
-  }
-
-  /**
-   * Removes an attribute from this YXmlElement.
-   *
-   * @param {String} attributeName The attribute name that is to be removed.
-   *
-   * @public
-   */
-  removeAttribute (attributeName) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeMapDelete(transaction, this, attributeName)
-      })
-    } else {
-      // @ts-ignore
-      this._prelimAttrs.delete(attributeName)
-    }
-  }
-
-  /**
-   * Sets or updates an attribute.
-   *
-   * @param {String} attributeName The attribute name that is to be set.
-   * @param {String} attributeValue The attribute value that is to be set.
-   *
-   * @public
-   */
-  setAttribute (attributeName, attributeValue) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeMapSet(transaction, this, attributeName, attributeValue)
-      })
-    } else {
-      // @ts-ignore
-      this._prelimAttrs.set(attributeName, attributeValue)
-    }
-  }
-
-  /**
-   * Returns an attribute value that belongs to the attribute name.
-   *
-   * @param {String} attributeName The attribute name that identifies the
-   *                               queried value.
-   * @return {String} The queried attribute value.
-   *
-   * @public
-   */
-  getAttribute (attributeName) {
-    // @ts-ignore
-    return typeMapGet(this, attributeName)
-  }
-
-  /**
-   * Returns all attribute name/value pairs in a JSON Object.
-   *
-   * @param {Snapshot} [snapshot]
-   * @return {Object} A JSON Object that describes the attributes.
-   *
-   * @public
-   */
-  getAttributes (snapshot) {
-    return typeMapGetAll(this)
-  }
-
-  /**
-   * Creates a Dom Element that mirrors this YXmlElement.
-   *
-   * @param {Document} [_document=document] The document object (you must define
-   *                                        this when calling this method in
-   *                                        nodejs)
-   * @param {Object<string, any>} [hooks={}] Optional property to customize how hooks
-   *                                             are presented in the DOM
-   * @param {any} [binding] You should not set this property. This is
-   *                               used if DomBinding wants to create a
-   *                               association to the created DOM type.
-   * @return {Node} The {@link https://developer.mozilla.org/en-US/docs/Web/API/Element|Dom Element}
-   *
-   * @public
-   */
-  toDOM (_document = document, hooks = {}, binding) {
-    const dom = _document.createElement(this.nodeName)
-    let attrs = this.getAttributes()
-    for (let key in attrs) {
-      dom.setAttribute(key, attrs[key])
-    }
-    typeArrayForEach(this, yxml => {
-      dom.appendChild(yxml.toDOM(_document, hooks, binding))
-    })
-    if (binding !== undefined) {
-      binding._createAssociation(dom, this)
-    }
-    return dom
-  }
-
-  /**
-   * Transform the properties of this type to binary and write it to an
-   * BinaryEncoder.
-   *
-   * This is called when this Item is sent to a remote peer.
-   *
-   * @private
-   * @param {encoding.Encoder} encoder The encoder to write data to.
-   */
-  _write (encoder) {
-    encoding.writeVarUint(encoder, YXmlElementRefID)
-    encoding.writeVarString(encoder, this.nodeName)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @return {YXmlElement}
- *
- * @private
- * @function
- */
-export const readYXmlElement = decoder => new YXmlElement(decoding.readVarString(decoder))

src/types/YXmlEvent.js

@@ -1,39 +0,0 @@
-
-import {
-  YEvent,
-  YXmlElement, YXmlFragment, Transaction // eslint-disable-line
-} from '../internals.js'
-
-/**
- * An Event that describes changes on a YXml Element or Yxml Fragment
- */
-export class YXmlEvent extends YEvent {
-  /**
-   * @param {YXmlElement|YXmlFragment} target The target on which the event is created.
-   * @param {Set<string|null>} subs The set of changed attributes. `null` is included if the
-   *                   child list changed.
-   * @param {Transaction} transaction The transaction instance with wich the
-   *                                  change was created.
-   */
-  constructor (target, subs, transaction) {
-    super(target, transaction)
-    /**
-     * Whether the children changed.
-     * @type {Boolean}
-     * @private
-     */
-    this.childListChanged = false
-    /**
-     * Set of all changed attributes.
-     * @type {Set<string|null>}
-     */
-    this.attributesChanged = new Set()
-    subs.forEach((sub) => {
-      if (sub === null) {
-        this.childListChanged = true
-      } else {
-        this.attributesChanged.add(sub)
-      }
-    })
-  }
-}

src/types/YXmlFragment.js

@@ -1,313 +0,0 @@
-/**
- * @module YXml
- */
-
-import {
-  YXmlEvent,
-  YXmlElement,
-  AbstractType,
-  typeArrayMap,
-  typeArrayForEach,
-  typeArrayInsertGenerics,
-  typeArrayDelete,
-  typeArrayToArray,
-  YXmlFragmentRefID,
-  callTypeObservers,
-  transact,
-  Transaction, ItemType, YXmlText, YXmlHook, Snapshot // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js' // eslint-disable-line
-
-/**
- * Define the elements to which a set of CSS queries apply.
- * {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors|CSS_Selectors}
- *
- * @example
- *   query = '.classSelector'
- *   query = 'nodeSelector'
- *   query = '#idSelector'
- *
- * @typedef {string} CSS_Selector
- */
-
-/**
- * Dom filter function.
- *
- * @callback domFilter
- * @param {string} nodeName The nodeName of the element
- * @param {Map} attributes The map of attributes.
- * @return {boolean} Whether to include the Dom node in the YXmlElement.
- */
-
-/**
- * Represents a subset of the nodes of a YXmlElement / YXmlFragment and a
- * position within them.
- *
- * Can be created with {@link YXmlFragment#createTreeWalker}
- *
- * @public
- * @implements {IterableIterator}
- */
-export class YXmlTreeWalker {
-  /**
-   * @param {YXmlFragment | YXmlElement} root
-   * @param {function(AbstractType<any>):boolean} [f]
-   */
-  constructor (root, f = () => true) {
-    this._filter = f
-    this._root = root
-    /**
-     * @type {ItemType | null}
-     */
-    // @ts-ignore
-    this._currentNode = root._start
-    this._firstCall = true
-  }
-
-  [Symbol.iterator] () {
-    return this
-  }
-  /**
-   * Get the next node.
-   *
-   * @return {IteratorResult<YXmlElement|YXmlText|YXmlHook>} The next node.
-   *
-   * @public
-   */
-  next () {
-    let n = this._currentNode
-    if (n !== null && (!this._firstCall || n.deleted || !this._filter(n.type))) { // if first call, we check if we can use the first item
-      do {
-        if (!n.deleted && (n.type.constructor === YXmlElement || n.type.constructor === YXmlFragment) && n.type._start !== null) {
-          // walk down in the tree
-          // @ts-ignore
-          n = n.type._start
-        } else {
-          // walk right or up in the tree
-          while (n !== null) {
-            if (n.right !== null) {
-              // @ts-ignore
-              n = n.right
-              break
-            } else if (n.parent === this._root) {
-              n = null
-            } else {
-              n = n.parent._item
-            }
-          }
-        }
-      } while (n !== null && (n.deleted || !this._filter(n.type)))
-    }
-    this._firstCall = false
-    this._currentNode = n
-    if (n === null) {
-      // @ts-ignore return undefined if done=true (the expected result)
-      return { value: undefined, done: true }
-    }
-    // @ts-ignore
-    return { value: n.type, done: false }
-  }
-}
-
-/**
- * Represents a list of {@link YXmlElement}.and {@link YXmlText} types.
- * A YxmlFragment is similar to a {@link YXmlElement}, but it does not have a
- * nodeName and it does not have attributes. Though it can be bound to a DOM
- * element - in this case the attributes and the nodeName are not shared.
- *
- * @public
- * @extends AbstractType<YXmlEvent>
- */
-export class YXmlFragment extends AbstractType {
-  constructor () {
-    super()
-    /**
-     * @type {Array<any>|null}
-     * @private
-     */
-    this._prelimContent = []
-  }
-  /**
-   * Create a subtree of childNodes.
-   *
-   * @example
-   * const walker = elem.createTreeWalker(dom => dom.nodeName === 'div')
-   * for (let node in walker) {
-   *   // `node` is a div node
-   *   nop(node)
-   * }
-   *
-   * @param {function(AbstractType<any>):boolean} filter Function that is called on each child element and
-   *                          returns a Boolean indicating whether the child
-   *                          is to be included in the subtree.
-   * @return {YXmlTreeWalker} A subtree and a position within it.
-   *
-   * @public
-   */
-  createTreeWalker (filter) {
-    return new YXmlTreeWalker(this, filter)
-  }
-
-  /**
-   * Returns the first YXmlElement that matches the query.
-   * Similar to DOM's {@link querySelector}.
-   *
-   * Query support:
-   *   - tagname
-   * TODO:
-   *   - id
-   *   - attribute
-   *
-   * @param {CSS_Selector} query The query on the children.
-   * @return {YXmlElement|YXmlText|YXmlHook|null} The first element that matches the query or null.
-   *
-   * @public
-   */
-  querySelector (query) {
-    query = query.toUpperCase()
-    // @ts-ignore
-    const iterator = new YXmlTreeWalker(this, element => element.nodeName === query)
-    const next = iterator.next()
-    if (next.done) {
-      return null
-    } else {
-      return next.value
-    }
-  }
-
-  /**
-   * Returns all YXmlElements that match the query.
-   * Similar to Dom's {@link querySelectorAll}.
-   *
-   * @todo Does not yet support all queries. Currently only query by tagName.
-   *
-   * @param {CSS_Selector} query The query on the children
-   * @return {Array<YXmlElement|YXmlText|YXmlHook|null>} The elements that match this query.
-   *
-   * @public
-   */
-  querySelectorAll (query) {
-    query = query.toUpperCase()
-    // @ts-ignore
-    return Array.from(new YXmlTreeWalker(this, element => element.nodeName === query))
-  }
-
-  /**
-   * Creates YXmlEvent and calls observers.
-   * @private
-   *
-   * @param {Transaction} transaction
-   * @param {Set<null|string>} parentSubs Keys changed on this type. `null` if list was modified.
-   */
-  _callObserver (transaction, parentSubs) {
-    callTypeObservers(this, transaction, new YXmlEvent(this, parentSubs, transaction))
-  }
-
-  /**
-   * Get the string representation of all the children of this YXmlFragment.
-   *
-   * @return {string} The string representation of all children.
-   */
-  toString () {
-    return typeArrayMap(this, xml => xml.toString()).join('')
-  }
-
-  toJSON () {
-    return this.toString()
-  }
-
-  /**
-   * Creates a Dom Element that mirrors this YXmlElement.
-   *
-   * @param {Document} [_document=document] The document object (you must define
-   *                                        this when calling this method in
-   *                                        nodejs)
-   * @param {Object<string, any>} [hooks={}] Optional property to customize how hooks
-   *                                             are presented in the DOM
-   * @param {any} [binding] You should not set this property. This is
-   *                               used if DomBinding wants to create a
-   *                               association to the created DOM type.
-   * @return {Node} The {@link https://developer.mozilla.org/en-US/docs/Web/API/Element|Dom Element}
-   *
-   * @public
-   */
-  toDOM (_document = document, hooks = {}, binding) {
-    const fragment = _document.createDocumentFragment()
-    if (binding !== undefined) {
-      binding._createAssociation(fragment, this)
-    }
-    typeArrayForEach(this, xmlType => {
-      fragment.insertBefore(xmlType.toDOM(_document, hooks, binding), null)
-    })
-    return fragment
-  }
-
-  /**
-   * Inserts new content at an index.
-   *
-   * @example
-   *  // Insert character 'a' at position 0
-   *  xml.insert(0, [new Y.XmlText('text')])
-   *
-   * @param {number} index The index to insert content at
-   * @param {Array<YXmlElement|YXmlText>} content The array of content
-   */
-  insert (index, content) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeArrayInsertGenerics(transaction, this, index, content)
-      })
-    } else {
-      // @ts-ignore _prelimContent is defined because this is not yet integrated
-      this._prelimContent.splice(index, 0, ...content)
-    }
-  }
-
-  /**
-   * Deletes elements starting from an index.
-   *
-   * @param {number} index Index at which to start deleting elements
-   * @param {number} [length=1] The number of elements to remove. Defaults to 1.
-   */
-  delete (index, length = 1) {
-    if (this._y !== null) {
-      transact(this._y, transaction => {
-        typeArrayDelete(transaction, this, index, length)
-      })
-    } else {
-      // @ts-ignore _prelimContent is defined because this is not yet integrated
-      this._prelimContent.splice(index, length)
-    }
-  }
-  /**
-   * Transforms this YArray to a JavaScript Array.
-   *
-   * @return {Array<YXmlElement|YXmlText|YXmlHook>}
-   */
-  toArray () {
-    return typeArrayToArray(this)
-  }
-  /**
-   * Transform the properties of this type to binary and write it to an
-   * BinaryEncoder.
-   *
-   * This is called when this Item is sent to a remote peer.
-   *
-   * @private
-   * @param {encoding.Encoder} encoder The encoder to write data to.
-   */
-  _write (encoder) {
-    encoding.writeVarUint(encoder, YXmlFragmentRefID)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @return {YXmlFragment}
- *
- * @private
- * @function
- */
-export const readYXmlFragment = decoder => new YXmlFragment()

src/types/YXmlHook.js

@@ -1,90 +0,0 @@
-
-import {
-  YMap,
-  YXmlHookRefID
-} from '../internals.js'
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-/**
- * You can manage binding to a custom type with YXmlHook.
- *
- * @extends {YMap<any>}
- */
-export class YXmlHook extends YMap {
-  /**
-   * @param {string} hookName nodeName of the Dom Node.
-   */
-  constructor (hookName) {
-    super()
-    /**
-     * @type {string}
-     */
-    this.hookName = hookName
-  }
-
-  /**
-   * Creates an Item with the same effect as this Item (without position effect)
-   *
-   * @private
-   */
-  _copy () {
-    return new YXmlHook(this.hookName)
-  }
-
-  /**
-   * Creates a Dom Element that mirrors this YXmlElement.
-   *
-   * @param {Document} [_document=document] The document object (you must define
-   *                                        this when calling this method in
-   *                                        nodejs)
-   * @param {Object.<string, any>} [hooks] Optional property to customize how hooks
-   *                                             are presented in the DOM
-   * @param {any} [binding] You should not set this property. This is
-   *                               used if DomBinding wants to create a
-   *                               association to the created DOM type
-   * @return {Element} The {@link https://developer.mozilla.org/en-US/docs/Web/API/Element|Dom Element}
-   *
-   * @public
-   */
-  toDOM (_document = document, hooks = {}, binding) {
-    const hook = hooks[this.hookName]
-    let dom
-    if (hook !== undefined) {
-      dom = hook.createDom(this)
-    } else {
-      dom = document.createElement(this.hookName)
-    }
-    dom.setAttribute('data-yjs-hook', this.hookName)
-    if (binding !== undefined) {
-      binding._createAssociation(dom, this)
-    }
-    return dom
-  }
-
-  /**
-   * Transform the properties of this type to binary and write it to an
-   * BinaryEncoder.
-   *
-   * This is called when this Item is sent to a remote peer.
-   *
-   * @param {encoding.Encoder} encoder The encoder to write data to.
-   *
-   * @private
-   */
-  _write (encoder) {
-    super._write(encoder)
-    encoding.writeVarUint(encoder, YXmlHookRefID)
-    encoding.writeVarString(encoder, this.hookName)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @return {YXmlHook}
- *
- * @private
- * @function
- */
-export const readYXmlHook = decoder =>
-  new YXmlHook(decoding.readVarString(decoder))

src/types/YXmlText.js

@@ -1,90 +0,0 @@
-
-import { YText, YXmlTextRefID } from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js' // eslint-disable-line
-
-/**
- * Represents text in a Dom Element. In the future this type will also handle
- * simple formatting information like bold and italic.
- */
-export class YXmlText extends YText {
-  /**
-   * Creates a Dom Element that mirrors this YXmlText.
-   *
-   * @param {Document} [_document=document] The document object (you must define
-   *                                        this when calling this method in
-   *                                        nodejs)
-   * @param {Object<string, any>} [hooks] Optional property to customize how hooks
-   *                                             are presented in the DOM
-   * @param {any} [binding] You should not set this property. This is
-   *                               used if DomBinding wants to create a
-   *                               association to the created DOM type.
-   * @return {Text} The {@link https://developer.mozilla.org/en-US/docs/Web/API/Element|Dom Element}
-   *
-   * @public
-   */
-  toDOM (_document = document, hooks, binding) {
-    const dom = _document.createTextNode(this.toString())
-    if (binding !== undefined) {
-      binding._createAssociation(dom, this)
-    }
-    return dom
-  }
-
-  toString () {
-    // @ts-ignore
-    return this.toDelta().map(delta => {
-      const nestedNodes = []
-      for (let nodeName in delta.attributes) {
-        const attrs = []
-        for (let key in delta.attributes[nodeName]) {
-          attrs.push({ key, value: delta.attributes[nodeName][key] })
-        }
-        // sort attributes to get a unique order
-        attrs.sort((a, b) => a.key < b.key ? -1 : 1)
-        nestedNodes.push({ nodeName, attrs })
-      }
-      // sort node order to get a unique order
-      nestedNodes.sort((a, b) => a.nodeName < b.nodeName ? -1 : 1)
-      // now convert to dom string
-      let str = ''
-      for (let i = 0; i < nestedNodes.length; i++) {
-        const node = nestedNodes[i]
-        str += `<${node.nodeName}`
-        for (let j = 0; j < node.attrs.length; j++) {
-          const attr = node.attrs[i]
-          str += ` ${attr.key}="${attr.value}"`
-        }
-        str += '>'
-      }
-      str += delta.insert
-      for (let i = nestedNodes.length - 1; i >= 0; i--) {
-        str += `</${nestedNodes[i].nodeName}>`
-      }
-      return str
-    }).join('')
-  }
-
-  toJSON () {
-    return this.toString()
-  }
-
-  /**
-   * @param {encoding.Encoder} encoder
-   *
-   * @private
-   */
-  _write (encoder) {
-    encoding.writeVarUint(encoder, YXmlTextRefID)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @return {YXmlText}
- *
- * @private
- * @function
- */
-export const readYXmlText = decoder => new YXmlText()

src/utils/DeleteSet.js

@@ -1,271 +0,0 @@
-
-import {
-  findIndexSS,
-  createID,
-  getState,
-  AbstractStruct, AbstractItem, StructStore, Transaction, ID // eslint-disable-line
-} from '../internals.js'
-
-import * as math from 'lib0/math.js'
-import * as map from 'lib0/map.js'
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-class DeleteItem {
-  /**
-   * @param {number} clock
-   * @param {number} len
-   */
-  constructor (clock, len) {
-    /**
-     * @type {number}
-     */
-    this.clock = clock
-    /**
-     * @type {number}
-     */
-    this.len = len
-  }
-}
-
-/**
- * We no longer maintain a DeleteStore. DeleteSet is a temporary object that is created when needed.
- * - When created in a transaction, it must only be accessed after sorting, and merging
- *   - This DeleteSet is send to other clients
- * - We do not create a DeleteSet when we send a sync message. The DeleteSet message is created directly from StructStore
- * - We read a DeleteSet as part of a sync/update message. In this case the DeleteSet is already sorted and merged.
- */
-export class DeleteSet {
-  constructor () {
-    /**
-     * @type {Map<number,Array<DeleteItem>>}
-     * @private
-     */
-    this.clients = new Map()
-  }
-}
-
-/**
- * Iterate over all structs that were deleted.
- *
- * This function expects that the deletes structs are not deleted. Hence, you can
- * probably only use it in type observes and `afterTransaction` events. But not
- * in `afterTransactionCleanup`.
- *
- * @param {DeleteSet} ds
- * @param {StructStore} store
- * @param {function(AbstractStruct):void} f
- *
- * @function
- */
-export const iterateDeletedStructs = (ds, store, f) =>
-  ds.clients.forEach((deletes, clientid) => {
-    const structs = /** @type {Array<AbstractStruct>} */ (store.clients.get(clientid))
-    for (let i = 0; i < deletes.length; i++) {
-      const del = deletes[i]
-      let index = findIndexSS(structs, del.clock)
-      let struct
-      do {
-        struct = structs[index++]
-        f(struct)
-      } while (index < structs.length && structs[index].id.clock < del.clock + del.len)
-    }
-  })
-
-/**
- * @param {Array<DeleteItem>} dis
- * @param {number} clock
- * @return {number|null}
- *
- * @private
- * @function
- */
-export const findIndexDS = (dis, clock) => {
-  let left = 0
-  let right = dis.length - 1
-  while (left <= right) {
-    const midindex = math.floor((left + right) / 2)
-    const mid = dis[midindex]
-    const midclock = mid.clock
-    if (midclock <= clock) {
-      if (clock < midclock + mid.len) {
-        return midindex
-      }
-      left = midindex + 1
-    } else {
-      right = midindex - 1
-    }
-  }
-  return null
-}
-
-/**
- * @param {DeleteSet} ds
- * @param {ID} id
- * @return {boolean}
- *
- * @private
- * @function
- */
-export const isDeleted = (ds, id) => {
-  const dis = ds.clients.get(id.client)
-  return dis !== undefined && findIndexDS(dis, id.clock) !== null
-}
-
-/**
- * @param {DeleteSet} ds
- *
- * @private
- * @function
- */
-export const sortAndMergeDeleteSet = ds => {
-  ds.clients.forEach(dels => {
-    dels.sort((a, b) => a.clock - b.clock)
-    // merge items without filtering or splicing the array
-    // i is the current pointer
-    // j refers to the current insert position for the pointed item
-    // try to merge dels[i] into dels[j-1] or set dels[j]=dels[i]
-    let i, j
-    for (i = 1, j = 1; i < dels.length; i++) {
-      const left = dels[j - 1]
-      const right = dels[i]
-      if (left.clock + left.len === right.clock) {
-        left.len += right.len
-      } else {
-        if (j < i) {
-          dels[j] = right
-        }
-        j++
-      }
-    }
-    dels.length = j
-  })
-}
-
-/**
- * @param {DeleteSet} ds
- * @param {ID} id
- * @param {number} length
- *
- * @private
- * @function
- */
-export const addToDeleteSet = (ds, id, length) => {
-  map.setIfUndefined(ds.clients, id.client, () => []).push(new DeleteItem(id.clock, length))
-}
-
-/**
- * @param {StructStore} ss
- * @return {DeleteSet} Merged and sorted DeleteSet
- *
- * @private
- * @function
- */
-export const createDeleteSetFromStructStore = ss => {
-  const ds = new DeleteSet()
-  ss.clients.forEach((structs, client) => {
-    /**
-     * @type {Array<DeleteItem>}
-     */
-    const dsitems = []
-    for (let i = 0; i < structs.length; i++) {
-      const struct = structs[i]
-      if (struct.deleted) {
-        const clock = struct.id.clock
-        let len = struct.length
-        if (i + 1 < structs.length) {
-          for (let next = structs[i + 1]; i + 1 < structs.length && next.id.clock === clock + len && next.deleted; next = structs[++i + 1]) {
-            len += next.length
-          }
-        }
-        dsitems.push(new DeleteItem(clock, len))
-      }
-    }
-    if (dsitems.length > 0) {
-      ds.clients.set(client, dsitems)
-    }
-  })
-  return ds
-}
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {DeleteSet} ds
- *
- * @private
- * @function
- */
-export const writeDeleteSet = (encoder, ds) => {
-  encoding.writeVarUint(encoder, ds.clients.size)
-  ds.clients.forEach((dsitems, client) => {
-    encoding.writeVarUint(encoder, client)
-    const len = dsitems.length
-    encoding.writeVarUint(encoder, len)
-    for (let i = 0; i < len; i++) {
-      const item = dsitems[i]
-      encoding.writeVarUint(encoder, item.clock)
-      encoding.writeVarUint(encoder, item.len)
-    }
-  })
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {Transaction} transaction
- * @param {StructStore} store
- *
- * @private
- * @function
- */
-export const readDeleteSet = (decoder, transaction, store) => {
-  const unappliedDS = new DeleteSet()
-  const numClients = decoding.readVarUint(decoder)
-  for (let i = 0; i < numClients; i++) {
-    const client = decoding.readVarUint(decoder)
-    const numberOfDeletes = decoding.readVarUint(decoder)
-    const structs = store.clients.get(client) || []
-    const state = getState(store, client)
-    for (let i = 0; i < numberOfDeletes; i++) {
-      const clock = decoding.readVarUint(decoder)
-      const len = decoding.readVarUint(decoder)
-      if (clock < state) {
-        if (state < clock + len) {
-          addToDeleteSet(unappliedDS, createID(client, state), clock + len - state)
-        }
-        let index = findIndexSS(structs, clock)
-        /**
-         * We can ignore the case of GC and Delete structs, because we are going to skip them
-         * @type {AbstractItem}
-         */
-        // @ts-ignore
-        let struct = structs[index]
-        // split the first item if necessary
-        if (!struct.deleted && struct.id.clock < clock) {
-          structs.splice(index + 1, 0, struct.splitAt(transaction, clock - struct.id.clock))
-          index++ // increase we now want to use the next struct
-        }
-        while (index < structs.length) {
-          // @ts-ignore
-          struct = structs[index++]
-          if (struct.id.clock < clock + len) {
-            if (!struct.deleted) {
-              if (clock + len < struct.id.clock + struct.length) {
-                structs.splice(index, 0, struct.splitAt(transaction, clock + len - struct.id.clock))
-              }
-              struct.delete(transaction)
-            }
-          } else {
-            break
-          }
-        }
-      } else {
-        addToDeleteSet(unappliedDS, createID(client, clock), len)
-      }
-    }
-  }
-  if (unappliedDS.clients.size > 0) {
-    const unappliedDSEncoder = encoding.createEncoder()
-    writeDeleteSet(unappliedDSEncoder, unappliedDS)
-    store.pendingDeleteReaders.push(decoding.createDecoder(encoding.toBuffer(unappliedDSEncoder)))
-  }
-}

src/utils/EventHandler.js

@@ -1,82 +0,0 @@
-import * as f from 'lib0/function.js'
-
-/**
- * General event handler implementation.
- *
- * @template ARG0, ARG1
- *
- * @private
- */
-export class EventHandler {
-  constructor () {
-    /**
-     * @type {Array<function(ARG0, ARG1):void>}
-     */
-    this.l = []
-  }
-}
-
-/**
- * @template ARG0,ARG1
- * @returns {EventHandler<ARG0,ARG1>}
- *
- * @private
- * @function
- */
-export const createEventHandler = () => new EventHandler()
-
-/**
- * Adds an event listener that is called when
- * {@link EventHandler#callEventListeners} is called.
- *
- * @template ARG0,ARG1
- * @param {EventHandler<ARG0,ARG1>} eventHandler
- * @param {function(ARG0,ARG1):void} f The event handler.
- *
- * @private
- * @function
- */
-export const addEventHandlerListener = (eventHandler, f) =>
-  eventHandler.l.push(f)
-
-/**
- * Removes an event listener.
- *
- * @template ARG0,ARG1
- * @param {EventHandler<ARG0,ARG1>} eventHandler
- * @param {function(ARG0,ARG1):void} f The event handler that was added with
- *                     {@link EventHandler#addEventListener}
- *
- * @private
- * @function
- */
-export const removeEventHandlerListener = (eventHandler, f) => {
-  eventHandler.l = eventHandler.l.filter(g => f !== g)
-}
-
-/**
- * Removes all event listeners.
- * @template ARG0,ARG1
- * @param {EventHandler<ARG0,ARG1>} eventHandler
- *
- * @private
- * @function
- */
-export const removeAllEventHandlerListeners = eventHandler => {
-  eventHandler.l.length = 0
-}
-
-/**
- * Call all event listeners that were added via
- * {@link EventHandler#addEventListener}.
- *
- * @template ARG0,ARG1
- * @param {EventHandler<ARG0,ARG1>} eventHandler
- * @param {ARG0} arg0
- * @param {ARG1} arg1
- *
- * @private
- * @function
- */
-export const callEventHandlerListeners = (eventHandler, arg0, arg1) =>
-  f.callAll(eventHandler.l, [arg0, arg1])

src/utils/ID.js

@@ -1,100 +0,0 @@
-
-import { AbstractType } from '../internals' // eslint-disable-line
-
-import * as decoding from 'lib0/decoding.js'
-import * as encoding from 'lib0/encoding.js'
-import * as error from 'lib0/error.js'
-
-export class ID {
-  /**
-   * @param {number} client client id
-   * @param {number} clock unique per client id, continuous number
-   */
-  constructor (client, clock) {
-    /**
-     * Client id
-     * @type {number}
-     */
-    this.client = client
-    /**
-     * unique per client id, continuous number
-     * @type {number}
-     */
-    this.clock = clock
-  }
-  /**
-   * @deprecated
-   * @todo remove and adapt relative position implementation
-   */
-  toJSON () {
-    return {
-      client: this.client,
-      clock: this.clock
-    }
-  }
-}
-
-/**
- * @param {ID | null} a
- * @param {ID | null} b
- * @return {boolean}
- *
- * @function
- */
-export const compareIDs = (a, b) => a === b || (a !== null && b !== null && a.client === b.client && a.clock === b.clock)
-
-/**
- * @param {number} client
- * @param {number} clock
- *
- * @private
- * @function
- */
-export const createID = (client, clock) => new ID(client, clock)
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {ID} id
- *
- * @private
- * @function
- */
-export const writeID = (encoder, id) => {
-  encoding.writeVarUint(encoder, id.client)
-  encoding.writeVarUint(encoder, id.clock)
-}
-
-/**
- * Read ID.
- * * If first varUint read is 0xFFFFFF a RootID is returned.
- * * Otherwise an ID is returned
- *
- * @param {decoding.Decoder} decoder
- * @return {ID}
- *
- * @private
- * @function
- */
-export const readID = decoder =>
-  createID(decoding.readVarUint(decoder), decoding.readVarUint(decoder))
-
-/**
- * The top types are mapped from y.share.get(keyname) => type.
- * `type` does not store any information about the `keyname`.
- * This function finds the correct `keyname` for `type` and throws otherwise.
- *
- * @param {AbstractType<any>} type
- * @return {string}
- *
- * @private
- * @function
- */
-export const findRootTypeKey = type => {
-  // @ts-ignore _y must be defined, otherwise unexpected case
-  for (let [key, value] of type._y.share) {
-    if (value === type) {
-      return key
-    }
-  }
-  throw error.unexpectedCase()
-}

src/utils/Snapshot.js

@@ -1,43 +0,0 @@
-
-import {
-  isDeleted,
-  DeleteSet, AbstractItem // eslint-disable-line
-} from '../internals.js'
-
-export class Snapshot {
-  /**
-   * @param {DeleteSet} ds delete store
-   * @param {Map<number,number>} sm state map
-   * @param {Map<number,string>} userMap
-   * @private
-   */
-  constructor (ds, sm, userMap) {
-    /**
-     * @type {DeleteSet}
-     * @private
-     */
-    this.ds = ds
-    /**
-     * State Map
-     * @type {Map<number,number>}
-     * @private
-     */
-    this.sm = sm
-    /**
-     * @type {Map<number,string>}
-     * @private
-     */
-    this.userMap = userMap
-  }
-}
-
-/**
- * @param {AbstractItem} item
- * @param {Snapshot|undefined} snapshot
- *
- * @protected
- * @function
- */
-export const isVisible = (item, snapshot) => snapshot === undefined ? !item.deleted : (
-  snapshot.sm.has(item.id.client) && (snapshot.sm.get(item.id.client) || 0) > item.id.clock && !isDeleted(snapshot.ds, item.id)
-)

src/utils/StructStore.js

@@ -1,303 +0,0 @@
-
-import {
-  GC,
-  Transaction, AbstractStructRef, ID, ItemType, AbstractItem, AbstractStruct // eslint-disable-line
-} from '../internals.js'
-
-import * as math from 'lib0/math.js'
-import * as error from 'lib0/error.js'
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-
-export class StructStore {
-  constructor () {
-    /**
-     * @type {Map<number,Array<AbstractStruct>>}
-     * @private
-     */
-    this.clients = new Map()
-    /**
-     * Store incompleted struct reads here
-     * `i` denotes to the next read operation
-     * We could shift the array of refs instead, but shift is incredible
-     * slow in Chrome for arrays with more than 100k elements
-     * @see tryResumePendingStructRefs
-     * @type {Map<number,{i:number,refs:Array<AbstractStructRef>}>}
-     * @private
-     */
-    this.pendingClientsStructRefs = new Map()
-    /**
-     * Stack of pending structs waiting for struct dependencies
-     * Maximum length of stack is structReaders.size
-     * @type {Array<AbstractStructRef>}
-     * @private
-     */
-    this.pendingStack = []
-    /**
-     * @type {Array<decoding.Decoder>}
-     * @private
-     */
-    this.pendingDeleteReaders = []
-  }
-}
-
-/**
- * Return the states as a Map<client,clock>.
- * Note that clock refers to the next expected clock id.
- *
- * @param {StructStore} store
- * @return {Map<number,number>}
- *
- * @public
- * @function
- */
-export const getStates = store => {
-  const sm = new Map()
-  store.clients.forEach((structs, client) => {
-    const struct = structs[structs.length - 1]
-    sm.set(client, struct.id.clock + struct.length)
-  })
-  return sm
-}
-
-/**
- * @param {StructStore} store
- * @param {number} client
- * @return {number}
- *
- * @public
- * @function
- */
-export const getState = (store, client) => {
-  const structs = store.clients.get(client)
-  if (structs === undefined) {
-    return 0
-  }
-  const lastStruct = structs[structs.length - 1]
-  return lastStruct.id.clock + lastStruct.length
-}
-
-/**
- * @param {StructStore} store
- *
- * @private
- * @function
- */
-export const integretyCheck = store => {
-  store.clients.forEach(structs => {
-    for (let i = 1; i < structs.length; i++) {
-      const l = structs[i - 1]
-      const r = structs[i]
-      if (l.id.clock + l.length !== r.id.clock) {
-        throw new Error('StructStore failed integrety check')
-      }
-    }
-  })
-}
-
-/**
- * @param {StructStore} store
- * @param {AbstractStruct} struct
- *
- * @private
- * @function
- */
-export const addStruct = (store, struct) => {
-  let structs = store.clients.get(struct.id.client)
-  if (structs === undefined) {
-    structs = []
-    store.clients.set(struct.id.client, structs)
-  } else {
-    const lastStruct = structs[structs.length - 1]
-    if (lastStruct.id.clock + lastStruct.length !== struct.id.clock) {
-      throw error.unexpectedCase()
-    }
-  }
-  structs.push(struct)
-}
-
-/**
- * Perform a binary search on a sorted array
- * @param {Array<any>} structs
- * @param {number} clock
- * @return {number}
- *
- * @private
- * @function
- */
-export const findIndexSS = (structs, clock) => {
-  let left = 0
-  let right = structs.length - 1
-  while (left <= right) {
-    const midindex = math.floor((left + right) / 2)
-    const mid = structs[midindex]
-    const midclock = mid.id.clock
-    if (midclock <= clock) {
-      if (clock < midclock + mid.length) {
-        return midindex
-      }
-      left = midindex + 1
-    } else {
-      right = midindex - 1
-    }
-  }
-  // Always check state before looking for a struct in StructStore
-  // Therefore the case of not finding a struct is unexpected
-  throw error.unexpectedCase()
-}
-
-/**
- * Expects that id is actually in store. This function throws or is an infinite loop otherwise.
- *
- * @param {StructStore} store
- * @param {ID} id
- * @return {AbstractStruct}
- *
- * @private
- * @function
- */
-export const find = (store, id) => {
-  /**
-   * @type {Array<AbstractStruct>}
-   */
-  // @ts-ignore
-  const structs = store.clients.get(id.client)
-  return structs[findIndexSS(structs, id.clock)]
-}
-
-/**
- * Expects that id is actually in store. This function throws or is an infinite loop otherwise.
- *
- * @param {StructStore} store
- * @param {ID} id
- * @return {AbstractItem}
- *
- * @private
- * @function
- */
-// @ts-ignore
-export const getItem = (store, id) => find(store, id)
-
-/**
- * Expects that id is actually in store. This function throws or is an infinite loop otherwise.
- *
- * @param {StructStore} store
- * @param {ID} id
- * @return {ItemType}
- *
- * @private
- * @function
- */
-// @ts-ignore
-export const getItemType = (store, id) => find(store, id)
-
-/**
- * Expects that id is actually in store. This function throws or is an infinite loop otherwise.
- *
- * @param {Transaction} transaction
- * @param {StructStore} store
- * @param {ID} id
- * @return {AbstractItem}
- *
- * @private
- * @function
- */
-export const getItemCleanStart = (transaction, store, id) => {
-  /**
-   * @type {Array<AbstractItem>}
-   */
-  // @ts-ignore
-  const structs = store.clients.get(id.client)
-  const index = findIndexSS(structs, id.clock)
-  /**
-   * @type {AbstractItem}
-   */
-  let struct = structs[index]
-  if (struct.id.clock < id.clock && struct.constructor !== GC) {
-    struct = struct.splitAt(transaction, id.clock - struct.id.clock)
-    structs.splice(index + 1, 0, struct)
-  }
-  return struct
-}
-
-/**
- * Expects that id is actually in store. This function throws or is an infinite loop otherwise.
- *
- * @param {Transaction} transaction
- * @param {StructStore} store
- * @param {ID} id
- * @return {AbstractItem}
- *
- * @private
- * @function
- */
-export const getItemCleanEnd = (transaction, store, id) => {
-  /**
-   * @type {Array<AbstractItem>}
-   */
-  // @ts-ignore
-  const structs = store.clients.get(id.client)
-  const index = findIndexSS(structs, id.clock)
-  const struct = structs[index]
-  if (id.clock !== struct.id.clock + struct.length - 1 && struct.constructor !== GC) {
-    structs.splice(index + 1, 0, struct.splitAt(transaction, id.clock - struct.id.clock + 1))
-  }
-  return struct
-}
-
-/**
- * Replace `item` with `newitem` in store
- * @param {StructStore} store
- * @param {AbstractStruct} struct
- * @param {AbstractStruct} newStruct
- *
- * @private
- * @function
- */
-export const replaceStruct = (store, struct, newStruct) => {
-  /**
-   * @type {Array<AbstractStruct>}
-   */
-  // @ts-ignore
-  const structs = store.clients.get(struct.id.client)
-  structs[findIndexSS(structs, struct.id.clock)] = newStruct
-}
-
-/**
- * Read StateMap from Decoder and return as Map
- *
- * @param {decoding.Decoder} decoder
- * @return {Map<number,number>}
- *
- * @private
- * @function
- */
-export const readStatesAsMap = decoder => {
-  const ss = new Map()
-  const ssLength = decoding.readVarUint(decoder)
-  for (let i = 0; i < ssLength; i++) {
-    const client = decoding.readVarUint(decoder)
-    const clock = decoding.readVarUint(decoder)
-    ss.set(client, clock)
-  }
-  return ss
-}
-
-/**
- * Write StateMap to Encoder
- *
- * @param {encoding.Encoder} encoder
- * @param {StructStore} store
- *
- * @private
- * @function
- */
-export const writeStates = (encoder, store) => {
-  encoding.writeVarUint(encoder, store.clients.size)
-  store.clients.forEach((structs, client) => {
-    const id = structs[structs.length - 1].id
-    encoding.writeVarUint(encoder, id.client)
-    encoding.writeVarUint(encoder, id.clock)
-  })
-  return encoder
-}

src/utils/Transaction.js

@@ -1,285 +0,0 @@
-
-import {
-  getState,
-  createID,
-  writeStructsFromTransaction,
-  writeDeleteSet,
-  DeleteSet,
-  sortAndMergeDeleteSet,
-  getStates,
-  findIndexSS,
-  callEventHandlerListeners,
-  AbstractItem,
-  ID, AbstractType, AbstractStruct, YEvent, Y // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as map from 'lib0/map.js'
-import * as math from 'lib0/math.js'
-
-/**
- * A transaction is created for every change on the Yjs model. It is possible
- * to bundle changes on the Yjs model in a single transaction to
- * minimize the number on messages sent and the number of observer calls.
- * If possible the user of this library should bundle as many changes as
- * possible. Here is an example to illustrate the advantages of bundling:
- *
- * @example
- * const map = y.define('map', YMap)
- * // Log content when change is triggered
- * map.observe(() => {
- *   console.log('change triggered')
- * })
- * // Each change on the map type triggers a log message:
- * map.set('a', 0) // => "change triggered"
- * map.set('b', 0) // => "change triggered"
- * // When put in a transaction, it will trigger the log after the transaction:
- * y.transact(() => {
- *   map.set('a', 1)
- *   map.set('b', 1)
- * }) // => "change triggered"
- *
- * @public
- */
-export class Transaction {
-  /**
-   * @param {Y} y
-   * @param {any} origin
-   */
-  constructor (y, origin) {
-    /**
-     * The Yjs instance.
-     * @type {Y}
-     */
-    this.y = y
-    /**
-     * Describes the set of deleted items by ids
-     * @type {DeleteSet}
-     */
-    this.deleteSet = new DeleteSet()
-    /**
-     * Holds the state before the transaction started.
-     * @type {Map<Number,Number>}
-     */
-    this.beforeState = getStates(y.store)
-    /**
-     * Holds the state after the transaction.
-     * @type {Map<Number,Number>}
-     */
-    this.afterState = new Map()
-    /**
-     * All types that were directly modified (property added or child
-     * inserted/deleted). New types are not included in this Set.
-     * Maps from type to parentSubs (`item._parentSub = null` for YArray)
-     * @type {Map<AbstractType<YEvent>,Set<String|null>>}
-     */
-    this.changed = new Map()
-    /**
-     * Stores the events for the types that observe also child elements.
-     * It is mainly used by `observeDeep`.
-     * @type {Map<AbstractType<YEvent>,Array<YEvent>>}
-     */
-    this.changedParentTypes = new Map()
-    /**
-     * @type {encoding.Encoder|null}
-     * @private
-     */
-    this._updateMessage = null
-    /**
-     * @type {Set<ID>}
-     * @private
-     */
-    this._mergeStructs = new Set()
-    /**
-     * @type {any}
-     */
-    this.origin = origin
-  }
-  /**
-   * @type {encoding.Encoder|null}
-   * @public
-   */
-  get updateMessage () {
-    // only create if content was added in transaction (state or ds changed)
-    if (this._updateMessage === null && (this.deleteSet.clients.size > 0 || map.any(this.afterState, (clock, client) => this.beforeState.get(client) !== clock))) {
-      const encoder = encoding.createEncoder()
-      sortAndMergeDeleteSet(this.deleteSet)
-      writeStructsFromTransaction(encoder, this)
-      writeDeleteSet(encoder, this.deleteSet)
-      this._updateMessage = encoder
-    }
-    return this._updateMessage
-  }
-}
-
-/**
- * @param {Transaction} transaction
- *
- * @private
- * @function
- */
-export const nextID = transaction => {
-  const y = transaction.y
-  return createID(y.clientID, getState(y.store, y.clientID))
-}
-
-/**
- * Implements the functionality of `y.transact(()=>{..})`
- *
- * @param {Y} y
- * @param {function(Transaction):void} f
- * @param {any} [origin]
- *
- * @private
- * @function
- */
-export const transact = (y, f, origin = null) => {
-  const transactionCleanups = y._transactionCleanups
-  let initialCall = false
-  if (y._transaction === null) {
-    initialCall = true
-    y._transaction = new Transaction(y, origin)
-    transactionCleanups.push(y._transaction)
-    y.emit('beforeTransaction', [y._transaction, y])
-  }
-  try {
-    f(y._transaction)
-  } finally {
-    // @todo set after state here
-    if (initialCall && transactionCleanups[0] === y._transaction) {
-      // The first transaction ended, now process observer calls.
-      // Observer call may create new transactions for which we need to call the observers and do cleanup.
-      // We don't want to nest these calls, so we execute these calls one after another
-      for (let i = 0; i < transactionCleanups.length; i++) {
-        const transaction = transactionCleanups[i]
-        const store = transaction.y.store
-        const ds = transaction.deleteSet
-        sortAndMergeDeleteSet(ds)
-        transaction.afterState = getStates(transaction.y.store)
-        y._transaction = null
-        y.emit('beforeObserverCalls', [transaction, y])
-        // emit change events on changed types
-        transaction.changed.forEach((subs, itemtype) => {
-          itemtype._callObserver(transaction, subs)
-        })
-        transaction.changedParentTypes.forEach((events, type) => {
-          events = events
-            .filter(event =>
-              event.target._item === null || !event.target._item.deleted
-            )
-          events
-            .forEach(event => {
-              event.currentTarget = type
-            })
-          // we don't need to check for events.length
-          // because we know it has at least one element
-          callEventHandlerListeners(type._dEH, events, transaction)
-        })
-        y.emit('afterTransaction', [transaction, y])
-        /**
-         * @param {Array<AbstractStruct>} structs
-         * @param {number} pos
-         */
-        const tryToMergeWithLeft = (structs, pos) => {
-          const left = structs[pos - 1]
-          const right = structs[pos]
-          if (left.deleted === right.deleted && left.constructor === right.constructor) {
-            if (left.mergeWith(right)) {
-              structs.splice(pos, 1)
-              if (right instanceof AbstractItem && right.parentSub !== null && right.parent._map.get(right.parentSub) === right) {
-                // @ts-ignore we already did a constructor check above
-                right.parent._map.set(right.parentSub, left)
-              }
-            }
-          }
-        }
-        // replace deleted items with ItemDeleted / GC
-        for (const [client, deleteItems] of ds.clients) {
-          /**
-           * @type {Array<AbstractStruct>}
-           */
-          // @ts-ignore
-          const structs = store.clients.get(client)
-          for (let di = deleteItems.length - 1; di >= 0; di--) {
-            const deleteItem = deleteItems[di]
-            const endDeleteItemClock = deleteItem.clock + deleteItem.len
-            for (
-              let si = findIndexSS(structs, deleteItem.clock), struct = structs[si];
-              si < structs.length && struct.id.clock < endDeleteItemClock;
-              struct = structs[++si]
-            ) {
-              const struct = structs[si]
-              if (deleteItem.clock + deleteItem.len <= struct.id.clock) {
-                break
-              }
-              if (struct.deleted && struct instanceof AbstractItem) {
-                struct.gc(transaction, store, false)
-              }
-            }
-          }
-        }
-        // try to merge deleted / gc'd items
-        // merge from right to left for better efficiecy and so we don't miss any merge targets
-        for (const [client, deleteItems] of ds.clients) {
-          /**
-           * @type {Array<AbstractStruct>}
-           */
-          // @ts-ignore
-          const structs = store.clients.get(client)
-          for (let di = deleteItems.length - 1; di >= 0; di--) {
-            const deleteItem = deleteItems[di]
-            // start with merging the item next to the last deleted item
-            const mostRightIndexToCheck = math.min(structs.length - 1, 1 + findIndexSS(structs, deleteItem.clock + deleteItem.len - 1))
-            for (
-              let si = mostRightIndexToCheck, struct = structs[si];
-              si > 0 && struct.id.clock >= deleteItem.clock;
-              struct = structs[--si]
-            ) {
-              tryToMergeWithLeft(structs, si)
-            }
-          }
-        }
-
-        // on all affected store.clients props, try to merge
-        for (const [client, clock] of transaction.afterState) {
-          const beforeClock = transaction.beforeState.get(client) || 0
-          if (beforeClock !== clock) {
-            /**
-             * @type {Array<AbstractStruct>}
-             */
-            // @ts-ignore
-            const structs = store.clients.get(client)
-            // we iterate from right to left so we can safely remove entries
-            const firstChangePos = math.max(findIndexSS(structs, beforeClock), 1)
-            for (let i = structs.length - 1; i >= firstChangePos; i--) {
-              tryToMergeWithLeft(structs, i)
-            }
-          }
-        }
-        // try to merge mergeStructs
-        // @todo: it makes more sense to transform mergeStructs to a DS, sort it, and merge from right to left
-        //        but at the moment DS does not handle duplicates
-        for (const mid of transaction._mergeStructs) {
-          const client = mid.client
-          const clock = mid.clock
-          /**
-           * @type {Array<AbstractStruct>}
-           */
-          // @ts-ignore
-          const structs = store.clients.get(client)
-          const replacedStructPos = findIndexSS(structs, clock)
-          if (replacedStructPos + 1 < structs.length) {
-            tryToMergeWithLeft(structs, replacedStructPos + 1)
-          }
-          if (replacedStructPos > 0) {
-            tryToMergeWithLeft(structs, replacedStructPos)
-          }
-        }
-        // @todo Merge all the transactions into one and provide send the data as a single update message
-        // @todo implement a dedicatet event that we can use to send updates to other peer
-        y.emit('afterTransactionCleanup', [transaction, y])
-      }
-      y._transactionCleanups = []
-    }
-  }
-}

src/utils/UndoManager.js

@@ -1,202 +0,0 @@
-// @ts-nocheck
-
-import {
-  isParentOf,
-  createID,
-  transact
-} from '../internals.js'
-
-/**
- * @private
- */
-class ReverseOperation {
-  constructor (y, transaction, bindingInfos) {
-    this.created = new Date()
-    const beforeState = transaction.beforeState
-    if (beforeState.has(y.userID)) {
-      this.toState = createID(y.userID, y.ss.getState(y.userID) - 1)
-      this.fromState = createID(y.userID, beforeState.get(y.userID))
-    } else {
-      this.toState = null
-      this.fromState = null
-    }
-    this.deletedStructs = new Set()
-    transaction.deletedStructs.forEach(struct => {
-      this.deletedStructs.add({
-        from: struct._id,
-        len: struct._length
-      })
-    })
-    /**
-     * Maps from binding to binding information (e.g. cursor information)
-     */
-    this.bindingInfos = bindingInfos
-  }
-}
-
-/**
- * @private
- * @function
- */
-function applyReverseOperation (y, scope, reverseBuffer) {
-  let performedUndo = false
-  let undoOp = null
-  transact(y, () => {
-    while (!performedUndo && reverseBuffer.length > 0) {
-      undoOp = reverseBuffer.pop()
-      // make sure that it is possible to iterate {from}-{to}
-      if (undoOp.fromState !== null) {
-        y.os.getItemCleanStart(undoOp.fromState)
-        y.os.getItemCleanEnd(undoOp.toState)
-        y.os.iterate(undoOp.fromState, undoOp.toState, op => {
-          while (op._deleted && op._redone !== null) {
-            op = op._redone
-          }
-          if (op._deleted === false && isParentOf(scope, op)) {
-            performedUndo = true
-            op._delete(y)
-          }
-        })
-      }
-      const redoitems = new Set()
-      for (let del of undoOp.deletedStructs) {
-        const fromState = del.from
-        const toState = createID(fromState.user, fromState.clock + del.len - 1)
-        y.os.getItemCleanStart(fromState)
-        y.os.getItemCleanEnd(toState)
-        y.os.iterate(fromState, toState, op => {
-          if (
-            isParentOf(scope, op) &&
-            op._parent !== y &&
-            (
-              op._id.user !== y.userID ||
-              undoOp.fromState === null ||
-              op._id.clock < undoOp.fromState.clock ||
-              op._id.clock > undoOp.toState.clock
-            )
-          ) {
-            redoitems.add(op)
-          }
-        })
-      }
-      redoitems.forEach(op => {
-        const opUndone = op._redo(y, redoitems)
-        performedUndo = performedUndo || opUndone
-      })
-    }
-  })
-  if (performedUndo && undoOp !== null) {
-    // should be performed after the undo transaction
-    undoOp.bindingInfos.forEach((info, binding) => {
-      binding._restoreUndoStackInfo(info)
-    })
-  }
-  return performedUndo
-}
-
-/**
- * Saves a history of locally applied operations. The UndoManager handles the
- * undoing and redoing of locally created changes.
- *
- * @private
- * @function
- */
-export class UndoManager {
-  /**
-   * @param {YType} scope The scope on which to listen for changes.
-   * @param {Object} options Optionally provided configuration.
-   */
-  constructor (scope, options = {}) {
-    this.options = options
-    this._bindings = new Set(options.bindings)
-    options.captureTimeout = options.captureTimeout == null ? 500 : options.captureTimeout
-    this._undoBuffer = []
-    this._redoBuffer = []
-    this._scope = scope
-    this._undoing = false
-    this._redoing = false
-    this._lastTransactionWasUndo = false
-    const y = scope._y
-    this.y = y
-    let bindingInfos
-    y.on('beforeTransaction', (y, transaction, remote) => {
-      if (!remote) {
-        // Store binding information before transaction is executed
-        // By restoring the binding information, we can make sure that the state
-        // before the transaction can be recovered
-        bindingInfos = new Map()
-        this._bindings.forEach(binding => {
-          bindingInfos.set(binding, binding._getUndoStackInfo())
-        })
-      }
-    })
-    y.on('afterTransaction', (y, transaction, remote) => {
-      if (!remote && transaction.changedParentTypes.has(scope)) {
-        let reverseOperation = new ReverseOperation(y, transaction, bindingInfos)
-        if (!this._undoing) {
-          let lastUndoOp = this._undoBuffer.length > 0 ? this._undoBuffer[this._undoBuffer.length - 1] : null
-          if (
-            this._redoing === false &&
-            this._lastTransactionWasUndo === false &&
-            lastUndoOp !== null &&
-            ((options.captureTimeout < 0) || (reverseOperation.created.getTime() - lastUndoOp.created.getTime()) <= options.captureTimeout)
-          ) {
-            lastUndoOp.created = reverseOperation.created
-            if (reverseOperation.toState !== null) {
-              lastUndoOp.toState = reverseOperation.toState
-              if (lastUndoOp.fromState === null) {
-                lastUndoOp.fromState = reverseOperation.fromState
-              }
-            }
-            reverseOperation.deletedStructs.forEach(lastUndoOp.deletedStructs.add, lastUndoOp.deletedStructs)
-          } else {
-            this._lastTransactionWasUndo = false
-            this._undoBuffer.push(reverseOperation)
-          }
-          if (!this._redoing) {
-            this._redoBuffer = []
-          }
-        } else {
-          this._lastTransactionWasUndo = true
-          this._redoBuffer.push(reverseOperation)
-        }
-      }
-    })
-  }
-
-  /**
-   * Enforce that the next change is created as a separate item in the undo stack
-   *
-   * @private
-   * @function
-   */
-  flushChanges () {
-    this._lastTransactionWasUndo = true
-  }
-
-  /**
-   * Undo the last locally created change.
-   *
-   * @private
-   * @function
-   */
-  undo () {
-    this._undoing = true
-    const performedUndo = applyReverseOperation(this.y, this._scope, this._undoBuffer)
-    this._undoing = false
-    return performedUndo
-  }
-
-  /**
-   * Redo the last locally created change.
-   *
-   * @private
-   * @function
-   */
-  redo () {
-    this._redoing = true
-    const performedRedo = applyReverseOperation(this.y, this._scope, this._redoBuffer)
-    this._redoing = false
-    return performedRedo
-  }
-}

src/utils/Y.js

@@ -1,177 +0,0 @@
-/**
- * @module Y
- */
-
-import {
-  StructStore,
-  AbstractType,
-  YArray,
-  YText,
-  YMap,
-  YXmlFragment,
-  transact,
-  Transaction, YEvent // eslint-disable-line
-} from '../internals.js'
-
-import { Observable } from 'lib0/observable.js'
-import * as random from 'lib0/random.js'
-import * as map from 'lib0/map.js'
-
-// @todo rename to shared document
-
-/**
- * A Yjs instance handles the state of shared data.
- * @extends Observable<string>
- */
-export class Y extends Observable {
-  /**
-   * @param {Object|undefined} conf configuration
-   */
-  constructor (conf = {}) {
-    super()
-    // todo: change to clientId
-    this.clientID = random.uint32()
-    /**
-     * @type {Map<string, AbstractType<YEvent>>}
-     */
-    this.share = new Map()
-    this.store = new StructStore()
-    /**
-     * @type {Transaction | null}
-     * @private
-     */
-    this._transaction = null
-    /**
-     * @type {Array<Transaction>}
-     * @private
-     */
-    this._transactionCleanups = []
-  }
-  /**
-   * Changes that happen inside of a transaction are bundled. This means that
-   * the observer fires _after_ the transaction is finished and that all changes
-   * that happened inside of the transaction are sent as one message to the
-   * other peers.
-   *
-   * @param {function(Transaction):void} f The function that should be executed as a transaction
-   * @param {any} [origin] Origin of who started the transaction. Will be stored on transaction.origin
-   *
-   * @public
-   */
-  transact (f, origin = null) {
-    transact(this, f, origin)
-  }
-  /**
-   * Define a shared data type.
-   *
-   * Multiple calls of `y.get(name, TypeConstructor)` yield the same result
-   * and do not overwrite each other. I.e.
-   * `y.define(name, Y.Array) === y.define(name, Y.Array)`
-   *
-   * After this method is called, the type is also available on `y.share.get(name)`.
-   *
-   * *Best Practices:*
-   * Define all types right after the Yjs instance is created and store them in a separate object.
-   * Also use the typed methods `getText(name)`, `getArray(name)`, ..
-   *
-   * @example
-   *   const y = new Y(..)
-   *   const appState = {
-   *     document: y.getText('document')
-   *     comments: y.getArray('comments')
-   *   }
-   *
-   * @param {string} name
-   * @param {Function} TypeConstructor The constructor of the type definition
-   * @return {AbstractType<any>} The created type. Constructed with TypeConstructor
-   *
-   * @public
-   */
-  get (name, TypeConstructor = AbstractType) {
-    const type = map.setIfUndefined(this.share, name, () => {
-      // @ts-ignore
-      const t = new TypeConstructor()
-      t._integrate(this, null)
-      return t
-    })
-    const Constr = type.constructor
-    if (TypeConstructor !== AbstractType && Constr !== TypeConstructor) {
-      if (Constr === AbstractType) {
-        const t = new Constr()
-        t._map = type._map
-        t._start = type._start
-        t._length = type._length
-        this.share.set(name, t)
-        t._integrate(this, null)
-        return t
-      } else {
-        throw new Error(`Type with the name ${name} has already been defined with a different constructor`)
-      }
-    }
-    return type
-  }
-  /**
-   * @template T
-   * @param {string} name
-   * @return {YArray<T>}
-   *
-   * @public
-   */
-  getArray (name) {
-    // @ts-ignore
-    return this.get(name, YArray)
-  }
-  /**
-   * @param {string} name
-   * @return {YText}
-   *
-   * @public
-   */
-  getText (name) {
-    // @ts-ignore
-    return this.get(name, YText)
-  }
-  /**
-   * @param {string} name
-   * @return {YMap<any>}
-   *
-   * @public
-   */
-  getMap (name) {
-    // @ts-ignore
-    return this.get(name, YMap)
-  }
-  /**
-   * @param {string} name
-   * @return {YXmlFragment}
-   *
-   * @public
-   */
-  getXmlFragment (name) {
-    // @ts-ignore
-    return this.get(name, YXmlFragment)
-  }
-  /**
-   * Emit `destroy` event and unregister all event handlers.
-   *
-   * @protected
-   */
-  destroy () {
-    this.emit('destroyed', [true])
-    super.destroy()
-  }
-  /**
-   * @param {string} eventName
-   * @param {function} f
-   */
-  on (eventName, f) {
-    super.on(eventName, f)
-  }
-  /**
-   * @param {string} eventName
-   * @param {function} f
-   */
-  off (eventName, f) {
-    super.off(eventName, f)
-  }
-}

src/utils/YEvent.js

@@ -1,108 +0,0 @@
-
-import {
-  isDeleted,
-  AbstractType, Transaction, AbstractStruct // eslint-disable-line
-} from '../internals.js'
-
-/**
- * YEvent describes the changes on a YType.
- */
-export class YEvent {
-  /**
-   * @param {AbstractType<any>} target The changed type.
-   * @param {Transaction} transaction
-   */
-  constructor (target, transaction) {
-    /**
-     * The type on which this event was created on.
-     * @type {AbstractType<any>}
-     */
-    this.target = target
-    /**
-     * The current target on which the observe callback is called.
-     * @type {AbstractType<any>}
-     */
-    this.currentTarget = target
-    /**
-     * The transaction that triggered this event.
-     * @type {Transaction}
-     */
-    this.transaction = transaction
-  }
-
-  /**
-   * Computes the path from `y` to the changed type.
-   *
-   * The following property holds:
-   * @example
-   *   let type = y
-   *   event.path.forEach(dir => {
-   *     type = type.get(dir)
-   *   })
-   *   type === event.target // => true
-   */
-  get path () {
-    // @ts-ignore _item is defined because target is integrated
-    return getPathTo(this.currentTarget, this.target)
-  }
-
-  /**
-   * Check if a struct is deleted by this event.
-   *
-   * @param {AbstractStruct} struct
-   * @return {boolean}
-   */
-  deletes (struct) {
-    return isDeleted(this.transaction.deleteSet, struct.id)
-  }
-
-  /**
-   * Check if a struct is added by this event.
-   *
-   * @param {AbstractStruct} struct
-   * @return {boolean}
-   */
-  adds (struct) {
-    return struct.id.clock >= (this.transaction.beforeState.get(struct.id.client) || 0)
-  }
-}
-
-/**
- * Compute the path from this type to the specified target.
- *
- * @example
- *   // `child` should be accessible via `type.get(path[0]).get(path[1])..`
- *   const path = type.getPathTo(child)
- *   // assuming `type instanceof YArray`
- *   console.log(path) // might look like => [2, 'key1']
- *   child === type.get(path[0]).get(path[1])
- *
- * @param {AbstractType<any>} parent
- * @param {AbstractType<any>} child target
- * @return {Array<string|number>} Path to the target
- *
- * @private
- * @function
- */
-const getPathTo = (parent, child) => {
-  const path = []
-  while (child._item !== null && child !== parent) {
-    if (child._item.parentSub !== null) {
-      // parent is map-ish
-      path.unshift(child._item.parentSub)
-    } else {
-      // parent is array-ish
-      let i = 0
-      let c = child._item.parent._start
-      while (c !== child._item && c !== null) {
-        if (!c.deleted) {
-          i++
-        }
-        c = c.right
-      }
-      path.unshift(i)
-    }
-    child = child._item.parent
-  }
-  return path
-}

src/utils/cursor.js

@@ -1,274 +0,0 @@
-/**
- * @module Cursors
- */
-
-import {
-  getItem,
-  getItemType,
-  createID,
-  writeID,
-  readID,
-  compareIDs,
-  getState,
-  findRootTypeKey,
-  AbstractItem,
-  ItemType,
-  ID, StructStore, Y, AbstractType // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-import * as error from 'lib0/error.js'
-
-/**
- * A Cursor is a relative position that is based on the Yjs model. In contrast to an
- * absolute position (position by index), the Cursor can be
- * recomputed when remote changes are received. For example:
- *
- * ```Insert(0, 'x')('a|bc') = 'xa|bc'``` Where | is the cursor position.
- *
- * A relative cursor position can be obtained with the function
- *
- * One of the properties must be defined.
- *
- * @example
- *   // Current cursor position is at position 10
- *   const relativePosition = createCursorFromOffset(yText, 10)
- *   // modify yText
- *   yText.insert(0, 'abc')
- *   yText.delete(3, 10)
- *   // Compute the cursor position
- *   const absolutePosition = toAbsolutePosition(y, relativePosition)
- *   absolutePosition.type === yText // => true
- *   console.log('cursor location is ' + absolutePosition.offset) // => cursor location is 3
- *
- */
-export class Cursor {
-  /**
-   * @param {ID|null} type
-   * @param {string|null} tname
-   * @param {ID|null} item
-   */
-  constructor (type, tname, item) {
-    /**
-     * @type {ID|null}
-     */
-    this.type = type
-    /**
-     * @type {string|null}
-     */
-    this.tname = tname
-    /**
-     * @type {ID | null}
-     */
-    this.item = item
-  }
-  toJSON () {
-    const json = {}
-    if (this.type !== null) {
-      json.type = this.type.toJSON()
-    }
-    if (this.tname !== null) {
-      json.tname = this.tname
-    }
-    if (this.item !== null) {
-      json.item = this.item.toJSON()
-    }
-    return json
-  }
-}
-
-/**
- * @param {Object} json
- * @return {Cursor}
- *
- * @function
- */
-export const createCursorFromJSON = json => new Cursor(json.type == null ? null : createID(json.type.client, json.type.clock), json.tname || null, json.item == null ? null : createID(json.item.client, json.item.clock))
-
-export class AbsolutePosition {
-  /**
-   * @param {AbstractType<any>} type
-   * @param {number} offset
-   */
-  constructor (type, offset) {
-    /**
-     * @type {AbstractType<any>}
-     */
-    this.type = type
-    /**
-     * @type {number}
-     */
-    this.offset = offset
-  }
-}
-
-/**
- * @param {AbstractType<any>} type
- * @param {number} offset
- *
- * @function
- */
-export const createAbsolutePosition = (type, offset) => new AbsolutePosition(type, offset)
-
-/**
- * @param {AbstractType<any>} type
- * @param {ID|null} item
- *
- * @function
- */
-export const createCursor = (type, item) => {
-  let typeid = null
-  let tname = null
-  if (type._item === null) {
-    tname = findRootTypeKey(type)
-  } else {
-    typeid = type._item.id
-  }
-  return new Cursor(typeid, tname, item)
-}
-
-/**
- * Create a relativePosition based on a absolute position.
- *
- * @param {AbstractType<any>} type The base type (e.g. YText or YArray).
- * @param {number} offset The absolute position.
- * @return {Cursor}
- *
- * @function
- */
-export const createCursorFromTypeOffset = (type, offset) => {
-  let t = type._start
-  while (t !== null) {
-    if (!t.deleted && t.countable) {
-      if (t.length > offset) {
-        // case 1: found position somewhere in the linked list
-        return createCursor(type, createID(t.id.client, t.id.clock + offset))
-      }
-      offset -= t.length
-    }
-    t = t.right
-  }
-  return createCursor(type, null)
-}
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {Cursor} rpos
- *
- * @function
- */
-export const writeCursor = (encoder, rpos) => {
-  const { type, tname, item } = rpos
-  if (item !== null) {
-    encoding.writeVarUint(encoder, 0)
-    writeID(encoder, item)
-  } else if (tname !== null) {
-    // case 2: found position at the end of the list and type is stored in y.share
-    encoding.writeUint8(encoder, 1)
-    encoding.writeVarString(encoder, tname)
-  } else if (type !== null) {
-    // case 3: found position at the end of the list and type is attached to an item
-    encoding.writeUint8(encoder, 2)
-    writeID(encoder, type)
-  } else {
-    throw error.unexpectedCase()
-  }
-  return encoder
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {Y} y
- * @param {StructStore} store
- * @return {Cursor|null}
- *
- * @function
- */
-export const readCursor = (decoder, y, store) => {
-  let type = null
-  let tname = null
-  let itemID = null
-  switch (decoding.readVarUint(decoder)) {
-    case 0:
-      // case 1: found position somewhere in the linked list
-      itemID = readID(decoder)
-      break
-    case 1:
-      // case 2: found position at the end of the list and type is stored in y.share
-      tname = decoding.readVarString(decoder)
-      break
-    case 2: {
-      // case 3: found position at the end of the list and type is attached to an item
-      type = readID(decoder)
-    }
-  }
-  return new Cursor(type, tname, itemID)
-}
-
-/**
- * @param {Cursor} cursor
- * @param {Y} y
- * @return {AbsolutePosition|null}
- *
- * @function
- */
-export const createAbsolutePositionFromCursor = (cursor, y) => {
-  const store = y.store
-  const rightID = cursor.item
-  const typeID = cursor.type
-  const tname = cursor.tname
-  let type = null
-  let offset = 0
-  if (rightID !== null) {
-    if (getState(store, rightID.client) <= rightID.clock) {
-      return null
-    }
-    const right = getItem(store, rightID)
-    if (!(right instanceof AbstractItem)) {
-      return null
-    }
-    offset = right.deleted || !right.countable ? 0 : rightID.clock - right.id.clock
-    let n = right.left
-    while (n !== null) {
-      if (!n.deleted && n.countable) {
-        offset += n.length
-      }
-      n = n.left
-    }
-    type = right.parent
-  } else {
-    if (tname !== null) {
-      type = y.get(tname)
-    } else if (typeID !== null) {
-      if (getState(store, typeID.client) <= typeID.clock) {
-        // type does not exist yet
-        return null
-      }
-      const struct = getItemType(store, typeID)
-      if (struct instanceof ItemType) {
-        type = struct.type
-      } else {
-        // struct is garbage collected
-        return null
-      }
-    } else {
-      throw error.unexpectedCase()
-    }
-    offset = type._length
-  }
-  if (type._item !== null && type._item.deleted) {
-    return null
-  }
-  return createAbsolutePosition(type, offset)
-}
-
-/**
- * @param {Cursor|null} a
- * @param {Cursor|null} b
- *
- * @function
- */
-export const compareCursors = (a, b) => a === b || (
-  a !== null && b !== null && a.tname === b.tname && compareIDs(a.item, b.item) && compareIDs(a.type, b.type)
-)

src/utils/encoding.js

@@ -1,321 +0,0 @@
-
-/**
- * @module encoding
- */
-
-import {
-  findIndexSS,
-  GCRef,
-  ItemBinaryRef,
-  ItemDeletedRef,
-  ItemEmbedRef,
-  ItemFormatRef,
-  ItemJSONRef,
-  ItemStringRef,
-  ItemTypeRef,
-  writeID,
-  createID,
-  readID,
-  getState,
-  getStates,
-  readDeleteSet,
-  writeDeleteSet,
-  createDeleteSetFromStructStore,
-  Transaction, AbstractStruct, AbstractStructRef, StructStore, ID // eslint-disable-line
-} from '../internals.js'
-
-import * as encoding from 'lib0/encoding.js'
-import * as decoding from 'lib0/decoding.js'
-import * as binary from 'lib0/binary.js'
-
-/**
- * @private
- */
-export const structRefs = [
-  GCRef,
-  ItemBinaryRef,
-  ItemDeletedRef,
-  ItemEmbedRef,
-  ItemFormatRef,
-  ItemJSONRef,
-  ItemStringRef,
-  ItemTypeRef
-]
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {Array<AbstractStruct>} structs All structs by `client`
- * @param {number} client
- * @param {number} clock write structs starting with `ID(client,clock)`
- *
- * @function
- */
-const writeStructs = (encoder, structs, client, clock) => {
-  // write first id
-  const startNewStructs = findIndexSS(structs, clock)
-  // write # encoded structs
-  encoding.writeVarUint(encoder, structs.length - startNewStructs)
-  writeID(encoder, createID(client, clock))
-  const firstStruct = structs[startNewStructs]
-  // write first struct with an offset
-  firstStruct.write(encoder, clock - firstStruct.id.clock, 0)
-  for (let i = startNewStructs + 1; i < structs.length; i++) {
-    structs[i].write(encoder, 0, 0)
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {number} numOfStructs
- * @param {ID} nextID
- * @return {Array<AbstractStructRef>}
- *
- * @private
- * @function
- */
-const readStructRefs = (decoder, numOfStructs, nextID) => {
-  /**
-   * @type {Array<AbstractStructRef>}
-   */
-  const refs = []
-  for (let i = 0; i < numOfStructs; i++) {
-    const info = decoding.readUint8(decoder)
-    const ref = new structRefs[binary.BITS5 & info](decoder, nextID, info)
-    nextID = createID(nextID.client, nextID.clock + ref.length)
-    refs.push(ref)
-  }
-  return refs
-}
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {StructStore} store
- * @param {Map<number,number>} _sm
- *
- * @private
- * @function
- */
-export const writeClientsStructs = (encoder, store, _sm) => {
-  // we filter all valid _sm entries into sm
-  const sm = new Map()
-  _sm.forEach((clock, client) => {
-    // only write if new structs are available
-    if (getState(store, client) > clock) {
-      sm.set(client, clock)
-    }
-  })
-  getStates(store).forEach((clock, client) => {
-    if (!_sm.has(client)) {
-      sm.set(client, 0)
-    }
-  })
-  // write # states that were updated
-  encoding.writeVarUint(encoder, sm.size)
-  sm.forEach((clock, client) => {
-    // @ts-ignore
-    writeStructs(encoder, store.clients.get(client), client, clock)
-  })
-}
-
-/**
- * @param {decoding.Decoder} decoder The decoder object to read data from.
- * @return {Map<number,Array<AbstractStructRef>>}
- *
- * @private
- * @function
- */
-export const readClientsStructRefs = decoder => {
-  /**
-   * @type {Map<number,Array<AbstractStructRef>>}
-   */
-  const clientRefs = new Map()
-  const numOfStateUpdates = decoding.readVarUint(decoder)
-  for (let i = 0; i < numOfStateUpdates; i++) {
-    const numberOfStructs = decoding.readVarUint(decoder)
-    const nextID = readID(decoder)
-    const refs = readStructRefs(decoder, numberOfStructs, nextID)
-    clientRefs.set(nextID.client, refs)
-  }
-  return clientRefs
-}
-
-/**
- * Resume computing structs generated by struct readers.
- *
- * While there is something to do, we integrate structs in this order
- * 1. top element on stack, if stack is not empty
- * 2. next element from current struct reader (if empty, use next struct reader)
- *
- * If struct causally depends on another struct (ref.missing), we put next reader of
- * `ref.id.client` on top of stack.
- *
- * At some point we find a struct that has no causal dependencies,
- * then we start emptying the stack.
- *
- * It is not possible to have circles: i.e. struct1 (from client1) depends on struct2 (from client2)
- * depends on struct3 (from client1). Therefore the max stack size is eqaul to `structReaders.length`.
- *
- * This method is implemented in a way so that we can resume computation if this update
- * causally depends on another update.
- *
- * @param {Transaction} transaction
- * @param {StructStore} store
- *
- * @private
- * @function
- */
-const resumeStructIntegration = (transaction, store) => {
-  const stack = store.pendingStack
-  const clientsStructRefs = store.pendingClientsStructRefs
-  // iterate over all struct readers until we are done
-  while (stack.length !== 0 || clientsStructRefs.size !== 0) {
-    if (stack.length === 0) {
-      // take any first struct from clientsStructRefs and put it on the stack
-      const [client, structRefs] = clientsStructRefs.entries().next().value
-      stack.push(structRefs.refs[structRefs.i++])
-      if (structRefs.refs.length === structRefs.i) {
-        clientsStructRefs.delete(client)
-      }
-    }
-    const ref = stack[stack.length - 1]
-    const m = ref._missing
-    const client = ref.id.client
-    const localClock = getState(store, client)
-    const offset = ref.id.clock < localClock ? localClock - ref.id.clock : 0
-    if (ref.id.clock + offset !== localClock) {
-      // A previous message from this client is missing
-      // check if there is a pending structRef with a smaller clock and switch them
-      const structRefs = clientsStructRefs.get(client)
-      if (structRefs !== undefined) {
-        const r = structRefs.refs[structRefs.i]
-        if (r.id.clock < ref.id.clock) {
-          // put ref with smaller clock on stack instead and continue
-          structRefs.refs[structRefs.i] = ref
-          stack[stack.length - 1] = r
-          // sort the set because this approach might bring the list out of order
-          structRefs.refs = structRefs.refs.slice(structRefs.i).sort((r1, r2) => r1.id.client - r2.id.client)
-          structRefs.i = 0
-          continue
-        }
-      }
-      // wait until missing struct is available
-      return
-    }
-    while (m.length > 0) {
-      const missing = m[m.length - 1]
-      if (getState(store, missing.client) <= missing.clock) {
-        const client = missing.client
-        // get the struct reader that has the missing struct
-        const structRefs = clientsStructRefs.get(client)
-        if (structRefs === undefined) {
-          // This update message causally depends on another update message.
-          return
-        }
-        stack.push(structRefs.refs[structRefs.i++])
-        if (structRefs.i === structRefs.refs.length) {
-          clientsStructRefs.delete(client)
-        }
-        break
-      }
-      ref._missing.pop()
-    }
-    if (m.length === 0) {
-      if (offset < ref.length) {
-        ref.toStruct(transaction, store, offset).integrate(transaction)
-      }
-      stack.pop()
-    }
-  }
-}
-
-/**
- * @param {Transaction} transaction
- * @param {StructStore} store
- *
- * @private
- * @function
- */
-export const tryResumePendingDeleteReaders = (transaction, store) => {
-  const pendingReaders = store.pendingDeleteReaders
-  store.pendingDeleteReaders = []
-  for (let i = 0; i < pendingReaders.length; i++) {
-    readDeleteSet(pendingReaders[i], transaction, store)
-  }
-}
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {Transaction} transaction
- *
- * @private
- * @function
- */
-export const writeStructsFromTransaction = (encoder, transaction) => writeClientsStructs(encoder, transaction.y.store, transaction.beforeState)
-
-/**
- * @param {StructStore} store
- * @param {Map<number, Array<AbstractStructRef>>} clientsStructsRefs
- *
- * @private
- * @function
- */
-const mergeReadStructsIntoPendingReads = (store, clientsStructsRefs) => {
-  const pendingClientsStructRefs = store.pendingClientsStructRefs
-  for (const [client, structRefs] of clientsStructsRefs) {
-    const pendingStructRefs = pendingClientsStructRefs.get(client)
-    if (pendingStructRefs === undefined) {
-      pendingClientsStructRefs.set(client, { refs: structRefs, i: 0 })
-    } else {
-      // merge into existing structRefs
-      const merged = pendingStructRefs.i > 0 ? pendingStructRefs.refs.slice(pendingStructRefs.i) : pendingStructRefs.refs
-      for (let i = 0; i < structRefs.length; i++) {
-        merged.push(structRefs[i])
-      }
-      pendingStructRefs.i = 0
-      pendingStructRefs.refs = merged.sort((r1, r2) => r1.id.clock - r2.id.clock)
-    }
-  }
-}
-
-/**
- * Read the next Item in a Decoder and fill this Item with the read data.
- *
- * This is called when data is received from a remote peer.
- *
- * @param {decoding.Decoder} decoder The decoder object to read data from.
- * @param {Transaction} transaction
- * @param {StructStore} store
- *
- * @private
- * @function
- */
-export const readStructs = (decoder, transaction, store) => {
-  const clientsStructRefs = readClientsStructRefs(decoder)
-  mergeReadStructsIntoPendingReads(store, clientsStructRefs)
-  resumeStructIntegration(transaction, store)
-  tryResumePendingDeleteReaders(transaction, store)
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {Transaction} transaction
- * @param {StructStore} store
- *
- * @function
- */
-export const readModel = (decoder, transaction, store) => {
-  readStructs(decoder, transaction, store)
-  readDeleteSet(decoder, transaction, store)
-}
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {StructStore} store
- * @param {Map<number,number>} [targetState] The state of the target that receives the update. Leave empty to write all known structs
- *
- * @function
- */
-export const writeModel = (encoder, store, targetState = new Map()) => {
-  writeClientsStructs(encoder, store, targetState)
-  writeDeleteSet(encoder, createDeleteSetFromStructStore(store))
-}

src/utils/isParentOf.js

@@ -1,22 +0,0 @@
-
-import { AbstractType } from '../internals.js' // eslint-disable-line
-
-/**
- * Check if `parent` is a parent of `child`.
- *
- * @param {AbstractType<any>} parent
- * @param {AbstractType<any>} child
- * @return {Boolean} Whether `parent` is a parent of `child`.
- *
- * @private
- * @function
- */
-export const isParentOf = (parent, child) => {
-  while (child._item !== null) {
-    if (child === parent) {
-      return true
-    }
-    child = child._item.parent
-  }
-  return false
-}

test.html

@@ -1,9 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <title>Testing Yjs</title>
-</head>
-<body>
-  <script type="module" src="./dist/tests.js"></script>
-</body>
-</html>

test/TestSuite.coffee

@@ -0,0 +1,219 @@
+chai      = require('chai')
+expect    = chai.expect
+sinon     = require('sinon')
+sinonChai = require('sinon-chai')
+_         = require("underscore")
+
+chai.use(sinonChai)
+
+Connector = require "../../y-test/lib/y-test.coffee"
+Y = null # need global reference!
+
+module.exports = class Test
+  constructor: (@name_suffix = "", Yjs)->
+    Y = Yjs
+    @number_of_test_cases_multiplier = 1
+    @repeat_this = 1 * @number_of_test_cases_multiplier
+    @doSomething_amount = 123 * @number_of_test_cases_multiplier
+    @number_of_engines = 5 + @number_of_test_cases_multiplier - 1
+
+    @time = 0 # denotes to the time when run was started
+    @ops = 0 # number of operations (used with @time)
+    @time_now = 0 # current time
+    @max_depth = 3
+
+    @debug = false
+
+    @reinitialize()
+    for gf in @getGeneratingFunctions(0)
+      if not (gf.types? and gf.f?)
+        throw new Error "Generating Functions are not initialized properly!"
+      for t in gf.types
+        if not t?
+          throw new Error "You havent includedt this type in Y (do require 'y-whatever')"
+
+  reinitialize: ()->
+    @users = []
+    for i in [0...@number_of_engines]
+      u = @makeNewUser (i+@name_suffix)
+      for user in @users
+        u._model.connector.join(user._model.connector) # TODO: change the test-connector to make this more convenient
+      @users.push u
+    @initUsers?(@users[0])
+    @flushAll()
+
+  # is called by implementing class
+  makeNewUser: (user)->
+    user._model.HB.stopGarbageCollection()
+    user
+
+  getSomeUser: ()->
+    i = _.random 0, (@users.length-1)
+    @users[i]
+
+  getRandomText: (chars, min_length = 0)->
+    chars ?= "abcdefghijklmnopqrstuvwxyz"
+    length = _.random min_length, 10
+    #length = 1
+    nextchar = chars[(_.random 0, (chars.length-1))]
+    text = ""
+    _(length).times ()-> text += nextchar
+    text
+
+  getRandomObject: ()->
+    result = {}
+    key1 = @getRandomKey()
+    key2 = @getRandomKey()
+    val1 = @getRandomText()
+    val2 = null
+    if _.random(0,1) is 1
+      val2 = @getRandomObject()
+    else
+      val2 = @getRandomText()
+    result[key1] = val1
+    result[key2] = val2
+    result
+
+  getRandomKey: ()->
+    @getRandomText [1,2,'x','y'], 1 # only 4 keys
+
+  getGeneratingFunctions: (user_num)=>
+    types = @users[user_num]._model.operations
+    []
+  getRandomRoot: (user_num)->
+    throw new Error "implement me!"
+
+  compare: (o1, o2, depth = (@max_depth+1))->
+    if o1 is o2 or depth <= 0
+      true
+    else if o1._name? and o1._name isnt o2._name
+      throw new Error "different types"
+    else if o1._model?
+      @compare o1._model, o2._model, depth
+    else if o1.type is "MapManager"
+      for name, val of o1.val()
+        @compare(val, o2.val(name), depth-1)
+    else if o1.type is "ListManager"
+      for val,i in o1.val()
+        @compare(val, o2.val(i), depth-1)
+    else if o1.constructor is Array and o2.constructor is Array
+      if o1.length isnt o2.length
+        throw new Error "The Arrays do not have the same size!"
+      for o,i in o1
+        @compare o, o2[i], (depth-1)
+    else if o1 isnt o2
+      throw new Error "different values"
+    else
+      throw new Error "I don't know what to do .. "
+
+  generateRandomOp: (user_num)=>
+    y = @getRandomRoot(user_num)
+    choices = @getGeneratingFunctions(user_num).filter (gf)->
+      _.some gf.types, (type)->
+        y instanceof type
+
+    if choices.length is 0
+      console.dir(y)
+      throw new Error "You forgot to specify a test generation methot for this Operation! (#{y.type})"
+    i = _.random 0, (choices.length-1)
+    choices[i].f y
+
+  applyRandomOp: (user_num)=>
+    user = @users[user_num]
+    user._model.connector.flushOneRandom()
+
+  doSomething: ()->
+    user_num = _.random (@number_of_engines-1)
+    choices = [@applyRandomOp, @generateRandomOp]
+    choice = _.random (choices.length-1)
+    choices[choice](user_num)
+
+  flushAll: (final)->
+    # TODO:!!
+    final = false
+    if @users.length <= 1 or not final
+      for user,user_number in @users
+        user._model.connector.flushAll()
+    else
+      for user,user_number in @users[1..]
+        user._model.connector.flushAll()
+      ops = @users[1].getHistoryBuffer()._encode @users[0].HB.getOperationCounter()
+      @users[0].engine.applyOpsCheckDouble ops
+
+
+  compareAll: (test_number)->
+    @flushAll(true)
+
+    @time += (new Date()).getTime() - @time_now
+
+    number_of_created_operations = 0
+    for i in [0...(@users.length)]
+      number_of_created_operations += @users[i]._model.connector.getOpsInExecutionOrder().length
+    @ops += number_of_created_operations*@users.length
+
+    ops_per_msek = Math.floor(@ops/@time)
+    if test_number? # and @debug
+      console.log "#{test_number}/#{@repeat_this}: #{number_of_created_operations} were created and applied on (#{@users.length}) users ops in a different order." + " Over all we consumed #{@ops} operations in #{@time/1000} seconds (#{ops_per_msek} ops/msek)."
+
+    for i in [0...(@users.length-1)]
+      if @debug
+        if not _.isEqual @getContent(i), @getContent(i+1)
+          printOpsInExecutionOrder = (otnumber, otherotnumber)=>
+            ops = _.filter @users[otnumber]._model.connector.getOpsInExecutionOrder(), (o)->
+              typeof o.uid.op_name isnt 'string' and o.uid.creator isnt '_'
+            for s,j in ops
+              console.log "op#{j} = " + (JSON.stringify s)
+            console.log ""
+            s = "ops = ["
+            for o,j in ops
+              if j isnt 0
+                s += ", "
+              s += "op#{j}"
+            s += "]"
+            console.log s
+            console.log "@test_user.engine.applyOps ops"
+            console.log "expect(@test_user.val('name').val()).to.equal(\"#{@users[otherotnumber].val('name').val()}\")"
+            ops
+          console.log ""
+          console.log "Found an OT Puzzle!"
+          console.log "OT states:"
+          for u,j in @users
+            console.log "OT#{j}: "+u.val('name').val()
+          console.log "\nOT execution order (#{i},#{i+1}):"
+          printOpsInExecutionOrder i, i+1
+          console.log ""
+          ops = printOpsInExecutionOrder i+1, i
+
+          console.log ""
+      expect(@compare(@users[i], @users[i+1])).to.not.be.undefined
+
+  run: ()->
+    if @debug
+      console.log ''
+    for times in [1..@repeat_this]
+      @time_now = (new Date).getTime()
+      for i in [1..Math.floor(@doSomething_amount/2)]
+        @doSomething()
+      @flushAll(false)
+      for u in @users
+        u._model.HB.emptyGarbage()
+      for i in [1..Math.floor(@doSomething_amount/2)]
+        @doSomething()
+
+      @compareAll(times)
+      @testHBencoding()
+      if times isnt @repeat_this
+        @reinitialize()
+
+  testHBencoding: ()->
+    # in case of JsonFramework, every user will create its JSON first! therefore, the testusers id must be small than all the others (see InsertType)
+    @users[@users.length] = @makeNewUser (-1) # this does not want to join with anymody
+
+    @users[@users.length-1]._model.HB.renewStateVector @users[0]._model.HB.getOperationCounter()
+    @users[@users.length-1]._model.engine.applyOps @users[0]._model.HB._encode()
+
+    #if @getContent(@users.length-1) isnt @getContent(0)
+    #  console.log "testHBencoding:"
+    #  console.log "Unprocessed ops first: #{@users[0].engine.unprocessed_ops.length}"
+    #  console.log "Unprocessed ops last: #{@users[@users.length-1].engine.unprocessed_ops.length}"
+    expect(@compare(@users[@users.length-1], @users[0])).to.not.be.undefined

test/object-test.coffee

@@ -0,0 +1,324 @@
+chai      = require('chai')
+expect    = chai.expect
+should    = chai.should()
+sinon     = require('sinon')
+sinonChai = require('sinon-chai')
+_         = require("underscore")
+
+chai.use(sinonChai)
+
+Y = require "../lib/y.coffee"
+Y.Test = require "../../y-test/lib/y-test.coffee"
+Y.Text = require "../../y-text/lib/y-text"
+Y.List = require "../../y-list/lib/y-list"
+
+TestSuite = require "./TestSuite"
+class ObjectTest extends TestSuite
+
+  constructor: (suffix)->
+    super suffix, Y
+
+  makeNewUser: (userId)->
+    conn = new Y.Test userId
+    super new Y conn
+
+  type: "ObjectTest"
+
+  getRandomRoot: (user_num, root, depth = @max_depth)->
+    root ?= @users[user_num]
+    if depth is 0 or _.random(0,1) is 1 # take root
+      root
+    else # take child
+      depth--
+      elems = null
+      if root._name is "Object"
+        elems =
+          for oname,val of root.val()
+            val
+      else if root._name is "Array"
+        elems = root.val()
+      else
+        return root
+
+      elems = elems.filter (elem)->
+        elem? and ((elem._name is "Array") or (elem._name is "Object"))
+      if elems.length is 0
+        root
+      else
+        p = elems[_.random(0, elems.length-1)]
+        @getRandomRoot user_num, p, depth
+
+  getGeneratingFunctions: (user_num)->
+    super(user_num).concat [
+        f : (y)=> # Delete Object Property
+          list = for name, o of y.val()
+            name
+          if list.length > 0
+            key = list[_.random(0,list.length-1)]
+            y.delete(key)
+        types: [Y.Object]
+      ,
+        f : (y)=> # SET Object Property
+          y.val(@getRandomKey(), new Y.Object(@getRandomObject()))
+        types: [Y.Object]
+      ,
+        f : (y)=> # SET PROPERTY TEXT
+          y.val(@getRandomKey(), new Y.Text(@getRandomText()))
+        types: [Y.Object]
+      ,
+        f : (y)=> # SET PROPERTY List
+          y.val(@getRandomKey(), new Y.List(@getRandomText().split("")))
+        types: [Y.Object]
+      ,
+        f : (y)=> # Delete Array Element
+          list = y.val()
+          if list.length > 0
+            i = _.random(0,list.length-1)
+            y.delete(i)
+        types: [Y.List]
+      ,
+        f : (y)=> # insert Object mutable
+          l = y.val().length
+          y.insert(_.random(0, l-1), new Y.Object(@getRandomObject()))
+        types: [Y.List]
+      ,
+        f : (y)=> # insert Text mutable
+          l = y.val().length
+          y.insert(_.random(0, l-1), new Y.Text(@getRandomText()))
+        types : [Y.List]
+      ,
+        f : (y)=> # insert List mutable
+          l = y.val().length
+          y.insert(_.random(0, l-1), new Y.List(@getRandomText().split("")))
+        types : [Y.List]
+      ,
+        f : (y)=> # insert Number (primitive object)
+          l = y.val().length
+          y.insert(_.random(0,l-1), _.random(0,42))
+        types : [Y.List]
+      ,
+        f : (y)=> # SET Object Property (circular)
+          y.val(@getRandomKey(), @getRandomRoot user_num)
+        types: [Y.Object]
+      ,
+        f : (y)=> # insert Object mutable (circular)
+          l = y.val().length
+          y.insert(_.random(0, l-1), @getRandomRoot user_num)
+        types: [Y.List]
+      ,
+        f : (y)=> # INSERT TEXT
+          y
+          pos = _.random 0, (y.val().length-1)
+          y.insert pos, @getRandomText()
+          null
+        types: [Y.Text]
+      ,
+        f : (y)-> # DELETE TEXT
+          if y.val().length > 0
+            pos = _.random 0, (y.val().length-1) # TODO: put here also arbitrary number (test behaviour in error cases)
+            length = _.random 0, (y.val().length - pos)
+            ops1 = y.delete pos, length
+          undefined
+        types : [Y.Text]
+      ]
+
+module.exports = ObjectTest
+
+describe "Object Test", ->
+  @timeout 500000
+
+  beforeEach (done)->
+    @yTest = new ObjectTest()
+    @users = @yTest.users
+
+    @test_user = @yTest.makeNewUser "test_user"
+    done()
+
+  it "can handle many engines, many operations, concurrently (random)", ->
+    console.log "" # TODO
+    @yTest.run()
+
+  it "has a working test suite", ->
+    @yTest.compareAll()
+
+  it "handles double-late-join", ->
+    test = new ObjectTest("double")
+    test.run()
+    @yTest.run()
+    u1 = test.users[0]
+    u2 = @yTest.users[1]
+    ops1 = u1._model.HB._encode()
+    ops2 = u2._model.HB._encode()
+    u1._model.engine.applyOp ops2, true
+    u2._model.engine.applyOp ops1, true
+
+    expect(@yTest.compare(u1, u2)).to.not.be.undefined
+
+  it "can handle creaton of complex json (1)", ->
+    @yTest.users[0].val('a', new Y.Text('q'))
+    @yTest.users[1].val('a', new Y.Text('t'))
+    @yTest.compareAll()
+    q = @yTest.users[2].val('a')
+    q.insert(0,'A')
+    @yTest.compareAll()
+    expect(@yTest.getSomeUser().val("a").val()).to.equal("At")
+
+  it "can handle creaton of complex json (2)", ->
+    @yTest.getSomeUser().val('x', new Y.Object({'a':'b'}))
+    @yTest.getSomeUser().val('a', new Y.Object({'a':{q: new Y.Text("dtrndtrtdrntdrnrtdnrtdnrtdnrtdnrdnrdt")}}))
+    @yTest.getSomeUser().val('b', new Y.Object({'a':{}}))
+    @yTest.getSomeUser().val('c', new Y.Object({'a':'c'}))
+    @yTest.getSomeUser().val('c', new Y.Object({'a':'b'}))
+    @yTest.compareAll()
+    q = @yTest.getSomeUser().val("a").val("a").val("q")
+    q.insert(0,'A')
+    @yTest.compareAll()
+    expect(@yTest.getSomeUser().val("a").val("a").val("q").val()).to.equal("Adtrndtrtdrntdrnrtdnrtdnrtdnrtdnrdnrdt")
+
+  it "can handle creaton of complex json (3)", ->
+    @yTest.users[0].val('l', new Y.List([1,2,3]))
+    @yTest.users[1].val('l', new Y.List([4,5,6]))
+    @yTest.compareAll()
+    @yTest.users[2].val('l').insert(0,'A')
+    w = @yTest.users[1].val('l').insert(0,new Y.Text('B')).val(0)
+    w.insert 1, "C"
+    expect(w.val()).to.equal("BC")
+    @yTest.compareAll()
+
+  it "handles immutables and primitive data types", ->
+    @yTest.getSomeUser().val('string', "text")
+    @yTest.getSomeUser().val('number', 4)
+    @yTest.getSomeUser().val('object', new Y.Object({q:"rr"}))
+    @yTest.getSomeUser().val('null', null)
+    @yTest.compareAll()
+    expect(@yTest.getSomeUser().val('string')).to.equal "text"
+    expect(@yTest.getSomeUser().val('number')).to.equal 4
+    expect(@yTest.getSomeUser().val('object').val('q')).to.equal "rr"
+    expect(@yTest.getSomeUser().val('null') is null).to.be.ok
+
+  it "handles immutables and primitive data types (2)", ->
+    @yTest.users[0].val('string', "text")
+    @yTest.users[1].val('number', 4)
+    @yTest.users[2].val('object', new Y.Object({q:"rr"}))
+    @yTest.users[0].val('null', null)
+    @yTest.compareAll()
+    expect(@yTest.getSomeUser().val('string')).to.equal "text"
+    expect(@yTest.getSomeUser().val('number')).to.equal 4
+    expect(@yTest.getSomeUser().val('object').val('q')).to.equal "rr"
+    expect(@yTest.getSomeUser().val('null') is null).to.be.ok
+
+  it "Observers work on JSON Types (add type observers, local and foreign)", ->
+    u = @yTest.users[0]
+    @yTest.flushAll()
+    last_task = null
+    observer1 = (changes)->
+      expect(changes.length).to.equal(1)
+      change = changes[0]
+      expect(change.type).to.equal("add")
+      expect(change.object).to.equal(u)
+      expect(change.changedBy).to.equal('0')
+      expect(change.name).to.equal("newStuff")
+      last_task = "observer1"
+    u.observe observer1
+    u.val("newStuff",new Y.Text("someStuff"))
+    expect(last_task).to.equal("observer1")
+    u.unobserve observer1
+
+    observer2 = (changes)->
+      expect(changes.length).to.equal(1)
+      change = changes[0]
+      expect(change.type).to.equal("add")
+      expect(change.object).to.equal(u)
+      expect(change.changedBy).to.equal('1')
+      expect(change.name).to.equal("moreStuff")
+      last_task = "observer2"
+    u.observe observer2
+    v = @yTest.users[1]
+    v.val("moreStuff","someMoreStuff")
+    @yTest.flushAll()
+    expect(last_task).to.equal("observer2")
+    u.unobserve observer2
+
+  it "Observers work on JSON Types (update type observers, local and foreign)", ->
+    u = @yTest.users[0].val("newStuff", new Y.Text("oldStuff")).val("moreStuff",new Y.Text("moreOldStuff"))
+    @yTest.flushAll()
+    last_task = null
+    observer1 = (changes)->
+      expect(changes.length).to.equal(1)
+      change = changes[0]
+      expect(change.type).to.equal("update")
+      expect(change.object).to.equal(u)
+      expect(change.changedBy).to.equal('0')
+      expect(change.name).to.equal("newStuff")
+      expect(change.oldValue.val()).to.equal("oldStuff")
+      last_task = "observer1"
+    u.observe observer1
+    u.val("newStuff","someStuff")
+    expect(last_task).to.equal("observer1")
+    u.unobserve observer1
+
+    observer2 = (changes)->
+      expect(changes.length).to.equal(1)
+      change = changes[0]
+      expect(change.type).to.equal("update")
+      expect(change.object).to.equal(u)
+      expect(change.changedBy).to.equal('1')
+      expect(change.name).to.equal("moreStuff")
+      expect(change.oldValue.val()).to.equal("moreOldStuff")
+      last_task = "observer2"
+    u.observe observer2
+    v = @yTest.users[1]
+    v.val("moreStuff","someMoreStuff")
+    @yTest.flushAll()
+    expect(last_task).to.equal("observer2")
+    u.unobserve observer2
+
+
+  it "Observers work on JSON Types (delete type observers, local and foreign)", ->
+    u = @yTest.users[0].val("newStuff",new Y.Text("oldStuff")).val("moreStuff",new Y.Text("moreOldStuff"))
+    @yTest.flushAll()
+    last_task = null
+    observer1 = (changes)->
+      expect(changes.length).to.equal(1)
+      change = changes[0]
+      expect(change.type).to.equal("delete")
+      expect(change.object).to.equal(u)
+      expect(change.changedBy).to.equal('0')
+      expect(change.name).to.equal("newStuff")
+      expect(change.oldValue.val()).to.equal("oldStuff")
+      last_task = "observer1"
+    u.observe observer1
+    u.delete("newStuff")
+    expect(last_task).to.equal("observer1")
+    u.unobserve observer1
+
+    observer2 = (changes)->
+      expect(changes.length).to.equal(1)
+      change = changes[0]
+      expect(change.type).to.equal("delete")
+      expect(change.object).to.equal(u)
+      expect(change.changedBy).to.equal('1')
+      expect(change.name).to.equal("moreStuff")
+      expect(change.oldValue.val()).to.equal("moreOldStuff")
+      last_task = "observer2"
+    u.observe observer2
+    v = @yTest.users[1]
+    v.delete("moreStuff")
+    @yTest.flushAll()
+    expect(last_task).to.equal("observer2")
+    u.unobserve observer2
+
+  it "can handle circular JSON", ->
+    u = @yTest.users[0]
+    u.val("me", u)
+    @yTest.compareAll()
+    u.val("stuff", new Y.Object({x: true}))
+    u.val("same_stuff", u.val("stuff"))
+    u.val("same_stuff").val("x", 5)
+    expect(u.val("same_stuff").val("x")).to.equal(5)
+    @yTest.compareAll()
+    u.val("stuff").val("y", u.val("stuff"))
+    @yTest.compareAll()
+
+
+

tests/encoding.tests.js

@@ -1,36 +0,0 @@
-import * as t from 'lib0/testing.js'
-
-import {
-  structRefs,
-  structGCRefNumber,
-  structBinaryRefNumber,
-  structDeletedRefNumber,
-  structEmbedRefNumber,
-  structFormatRefNumber,
-  structJSONRefNumber,
-  structStringRefNumber,
-  structTypeRefNumber,
-  GCRef,
-  ItemBinaryRef,
-  ItemDeletedRef,
-  ItemEmbedRef,
-  ItemFormatRef,
-  ItemJSONRef,
-  ItemStringRef,
-  ItemTypeRef
-} from '../src/internals.js'
-
-/**
- * @param {t.TestCase} tc
- */
-export const testStructReferences = tc => {
-  t.assert(structRefs.length === 8)
-  t.assert(structRefs[structGCRefNumber] === GCRef)
-  t.assert(structRefs[structBinaryRefNumber] === ItemBinaryRef)
-  t.assert(structRefs[structDeletedRefNumber] === ItemDeletedRef)
-  t.assert(structRefs[structEmbedRefNumber] === ItemEmbedRef)
-  t.assert(structRefs[structFormatRefNumber] === ItemFormatRef)
-  t.assert(structRefs[structJSONRefNumber] === ItemJSONRef)
-  t.assert(structRefs[structStringRefNumber] === ItemStringRef)
-  t.assert(structRefs[structTypeRefNumber] === ItemTypeRef)
-}