basic delta implementation

README: Remove duplicate btw mention

.esdoc.json

@@ -1,11 +0,0 @@
-{
-  "source": ".",
-  "destination": "./docs",
-  "excludes": ["build", "node_modules", "tests-lib", "test"],
-  "plugins": [{
-    "name": "esdoc-standard-plugin",
-    "option": {
-      "accessor": {"access": ["public"], "autoPrivate": true}
-    }
-  }]
-}

.github/workflows/node.js.yml

@@ -0,0 +1,31 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x, 20.x]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm ci
+    - run: npm run lint
+    - run: npm run test
+      env:
+        CI: true

.gitignore

@@ -1,8 +1,4 @@
 node_modules
-bower_components
-docs
-/y.*
-/examples_all/*/index.dist.*
+dist
 .vscode
-.yjsPersisted
-build
+docs

.jsdoc.json

@@ -5,7 +5,7 @@
     "dictionaries": ["jsdoc"]
   },
   "source": {
-    "include": ["./structs/Type.js", "./types", "./utils/UndoManager.js", "./utils/YEvent.js", "./utils/Y.js", "./provider", "./bindings"],
+    "include": ["./src"],
     "includePattern": ".js$"
   },
   "plugins": [
@@ -17,10 +17,13 @@
     "useCollapsibles": true,
     "collapse": true,
     "resources": {
-      "y-js.org": "yjs.website"
+      "yjs.dev": "Website",
+      "docs.yjs.dev": "Docs",
+      "discuss.yjs.dev": "Forum",
+      "https://gitter.im/Yjs/community": "Chat"
     },
     "logo": {
-      "url": "https://user-images.githubusercontent.com/5553757/48975307-61efb100-f06d-11e8-9177-ee895e5916e5.png",
+      "url": "https://yjs.dev/images/logo/yjs-512x512.png",
       "width": "162px",
       "height": "162px",
       "link": "/"
@@ -35,7 +38,7 @@
     ],
     "default": {
       "staticFiles": {
-          "include": ["examples/"]
+          "include": []
       }
     }
   },
@@ -44,7 +47,6 @@
     "encoding": "utf8",
     "private": false,
     "recurse": true,
-    "template": "./node_modules/tui-jsdoc-template",
-    "tutorials": "./examples"
+    "template": "./node_modules/tui-jsdoc-template"
   }
 }

.markdownlint.json

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

INTERNALS.md

@@ -0,0 +1,179 @@
+# Yjs Internals
+
+This document roughly explains how Yjs works internally. There is a complete
+walkthrough of the Yjs codebase available as a recording:
+https://youtu.be/0l5XgnQ6rB4
+
+The Yjs CRDT algorithm is described in the [YATA
+paper](https://www.researchgate.net/publication/310212186_Near_Real-Time_Peer-to-Peer_Shared_Editing_on_Extensible_Data_Types)
+from 2016. For an algorithmic view of how it works, the paper is a reasonable
+place to start. There are a handful of small improvements implemented in Yjs
+which aren't described in the paper. The most notable is that items have an
+`originRight` as well as an `origin` property, which improves performance when
+many concurrent inserts happen after the same character.
+
+At its heart, Yjs is a list CRDT. Everything is squeezed into a list in order to
+reuse the CRDT resolution algorithm:
+
+- Arrays are easy - they're lists of arbitrary items.
+- Text is a list of characters, optionally punctuated by formatting markers and
+  embeds for rich text support. Several characters can be wrapped in a single
+linked list `Item` (this is also known as the compound representation of
+CRDTs). More information about this in [this blog
+article](https://blog.kevinjahns.de/are-crdts-suitable-for-shared-editing/).
+- Maps are lists of entries. The last inserted entry for each key is used, and
+  all other duplicates for each key are flagged as deleted.
+
+Each client is assigned a unique *clientID* property on first insert. This is a
+random 53-bit integer (53 bits because that fits in the javascript safe integer
+range \[JavaScript uses IEEE 754 floats\]).
+
+## List items
+
+Each item in a Yjs list is made up of two objects:
+
+- An `Item` (*src/structs/Item.js*). This is used to relate the item to other
+  adjacent items.
+- An object in the `AbstractType` hierarchy (subclasses of
+  *src/types/AbstractType.js* - eg `YText`). This stores the actual content in
+the Yjs document.
+
+The item and type object pair have a 1-1 mapping. The item's `content` field
+references the AbstractType object and the AbstractType object's `_item` field
+references the item.
+
+Everything inserted in a Yjs document is given a unique ID, formed from a
+*ID(clientID, clock)* pair (also known as a [Lamport
+Timestamp](https://en.wikipedia.org/wiki/Lamport_timestamp)). The clock counts
+up from 0 with the first inserted character or item a client makes. This is
+similar to automerge's operation IDs, but note that the clock is only
+incremented by inserts. Deletes are handled in a very different way (see
+below).
+
+If a run of characters is inserted into a document (eg `"abc"`), the clock will
+be incremented for each character (eg 3 times here). But Yjs will only add a
+single `Item` into the list. This has no effect on the core CRDT algorithm, but
+the optimization dramatically decreases the number of javascript objects
+created during normal text editing. This optimization only applies if the
+characters share the same clientID, they're inserted in order, and all
+characters have either been deleted or all characters are not deleted. The item
+will be split if the run is interrupted for any reason (eg a character in the
+middle of the run is deleted).
+
+When an item is created, it stores a reference to the IDs of the preceding and
+succeeding item. These are stored in the item's `origin` and `originRight`
+fields, respectively. These are used when peers concurrently insert at the same
+location in a document. Though quite rare in practice, Yjs needs to make sure
+the list items always resolve to the same order on all peers. The actual logic
+is relatively simple - its only a couple dozen lines of code and it lives in
+the `Item#integrate()` method. The YATA paper has much more detail on this
+algorithm.
+
+### Item Storage
+
+The items themselves are stored in two data structures and a cache:
+
+- The items are stored in a tree of doubly-linked lists in *document order*.
+  Each item has `left` and `right` properties linking to its siblings in the
+document. Items also have a `parent` property to reference their parent in the
+document tree (null at the root). (And you can access an item's children, if
+any, through `item.content`).
+- All items are referenced in *insertion order* inside the struct store
+  (*src/utils/StructStore.js*). This references the list of items inserted by
+for each client, in chronological order. This is used to find an item in the
+tree with a given ID (using a binary search). It is also used to efficiently
+gather the operations a peer is missing during sync (more on this below).
+
+When a local insert happens, Yjs needs to map the insert position in the
+document (eg position 1000) to an ID. With just the linked list, this would
+require a slow O(n) linear scan of the list. But when editing a document, most
+inserts are either at the same position as the last insert, or nearby. To
+improve performance, Yjs stores a cache of the 80 most recently looked up
+insert positions in the document. This is consulted and updated when a position
+is looked up to improve performance in the average case. The cache is updated
+using a heuristic that is still changing (currently, it is updated when a new
+position significantly diverges from existing markers in the cache). Internally
+this is referred to as the skip list / fast search marker.
+
+### Deletions
+
+Deletions in Yjs are treated very differently from insertions. Insertions are
+implemented as a sequential operation based CRDT, but deletions are treated as
+a simpler state based CRDT.
+
+When an item has been deleted by any peer, at any point in history, it is
+flagged as deleted on the item. (Internally Yjs uses the `info` bitfield.) Yjs
+does not record metadata about a deletion:
+
+- No data is kept on *when* an item was deleted, or which user deleted it.
+- The struct store does not contain deletion records
+- The clientID's clock is not incremented
+
+If garbage collection is enabled in Yjs, when an object is deleted its content
+is discarded. If a deleted object contains children (eg a field is deleted in
+an object), the content is replaced with a `GC` object (*src/structs/GC.js*).
+This is a very lightweight structure - it only stores the length of the removed
+content.
+
+Yjs has some special logic to share which content in a document has been
+deleted:
+
+- When a delete happens, as well as marking the item, the deleted IDs are
+  listed locally within the transaction. (See below for more information about
+transactions.) When a transaction has been committed locally, the set of
+deleted items is appended to a transaction's update message.
+- A snapshot (a marked point in time in the Yjs history) is specified using
+  both the set of (clientID, clock) pairs *and* the set of all deleted item
+IDs. The deleted set is O(n), but because deletions usually happen in runs,
+this data set is usually tiny in practice. (The real world editing trace from
+the B4 benchmark document contains 182k inserts and 77k deleted characters. The
+deleted set size in a snapshot is only 4.5Kb).
+
+## Transactions
+
+All updates in Yjs happen within a *transaction*. (Defined in
+*src/utils/Transaction.js*.)
+
+The transaction collects a set of updates to the Yjs document to be applied on
+remote peers atomically. Once a transaction has been committed locally, it
+generates a compressed *update message* which is broadcast to synchronized
+remote peers to notify them of the local change. The update message contains:
+
+- The set of newly inserted items
+- The set of items deleted within the transaction.
+
+## Network protocol
+
+The network protocol is not really a part of Yjs. There are a few relevant
+concepts that can be used to create a custom network protocol:
+
+* `update`: The Yjs document can be encoded to an *update* object that can be
+  parsed to reconstruct the document. Also every change on the document fires
+an incremental document update that allows clients to sync with each other.
+The update object is a Uint8Array that efficiently encodes `Item` objects and
+the delete set.
+* `state vector`: A state vector defines the known state of each user (a set of
+  tuples `(client, clock)`). This object is also efficiently encoded as a
+Uint8Array.
+
+The client can ask a remote client for missing document updates by sending
+their state vector (often referred to as *sync step 1*). The remote peer can
+compute the missing `Item` objects using the `clocks` of the respective clients
+and compute a minimal update message that reflects all missing updates (sync
+step 2).
+
+An implementation of the syncing process is in
+[y-protocols](https://github.com/yjs/y-protocols).
+
+## Snapshots
+
+A snapshot can be used to restore an old document state. It is a `state vector`
+\+ `delete set`. A client can restore an old document state by iterating through
+the sequence CRDT and ignoring all Items that have an `id.clock >
+stateVector[id.client].clock`. Instead of using `item.deleted` the client will
+use the delete set to find out if an item was deleted or not.
+
+It is not recommended to restore an old document state using snapshots,
+although that would certainly be possible. Instead, the old state should be
+computed by iterating through the newest state and using the additional
+information from the state vector.

LICENSE

@@ -1,7 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2014
-  - Kevin Jahns <kevin.jahns@rwth-aachen.de>.
+Copyright (c) 2023
+  - Kevin Jahns <kevin.jahns@protonmail.com>.
   - Chair of Computer Science 5 (Databases & Information Systems), RWTH Aachen University, Germany
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

README.v13.md

@@ -1,367 +0,0 @@
-# ![Yjs](https://user-images.githubusercontent.com/5553757/48975307-61efb100-f06d-11e8-9177-ee895e5916e5.png)
-> A CRDT library with a powerful abstraction of shared data
-
-Yjs is a CRDT implementatation that exposes its internal structure as actual data types that can be manipulated and fire changes when remote or local changes happen. While Yjs can be used for all kinds of state management, we lay a special focus on shared editing.
-
-* Chat: [https://gitter.im/y-js/yjs](https://gitter.im/y-js/yjs)
-* Demos: [https://yjs.website/tutorial-prosemirror.html](https://yjs.website/tutorial-prosemirror.html)
-* API Docs: [https://yjs.website/](https://yjs.website/)
-
-### Supported Editors:
-
-| Name                                                   | Cursors |  Demo |
-|---|:-:|---|
-| [ProseMirror](https://prosemirror.net/) | ✔ | [link](https://yjs.website/tutorial-prosemirror.html) |
-| [Quill](https://quilljs.com/) |  | [link](https://yjs.website/tutorial-quill.html) |
-| [CodeMirror](https://codemirror.net/) | ✔ | [link](https://yjs.website/tutorial-codemirror.html) |
-| [Ace](https://ace.c9.io/) | | [link]() |
-| [Monaco](https://microsoft.github.io/monaco-editor/) | | [link]() |
-
-### Distinguishing Features
-
-* **Binary Encoding:**
-* **Undo/Redo:**
-* **Types:**
-* **Offline:** Yjs is designed to support offline editing. Read [this section](#Offline) about the limitations of offline editing in Yjs. The only provider supporting full offline editing is Ydb.
-* **Network-agnostic:** Yjs ships with many providers that handle connection and distribution of updates to other peers. Yjs itself is network-agnostic and does not depend on a central source of truth that distributes updates to other peers. Check [this section](#Create-a-Custom-Provider) to find out how the sync mechanism works and how to implement your custom provider.
-
-# Table of Contents
-
-* [Getting Started](#Getting-Started)
-  * [Tutorial](#Short-Tutorial)
-* [Providers](#Providers)
-  * [Websocket](#Websocket)
-  * [Ydb](#Ydb)
-  * [Create a Custom Provider](#Create-a-Custom-Provider)
-* [Shared Types](#Shared-Types)
-  * [YArray](#Yarray)
-  * [YMap](#YMap)
-  * [YText](#YText)
-  * [YXmlFragment and YXmlElement](#YXmlFragment-and-YXmlElement)
-  * [Create a Custom Type](#Create-a-Custom-Type)
-* [Bindings](#Bindings)
-  * [PromeMirror](#ProseMirror)
-  * [Quill](#Quill)
-  * [CodeMirror](#CodeMirror)
-  * [Ace](#Ace)
-  * [Monaco](#Monace)
-  * [DOM](#DOM)
-  * [Textarea](#Textarea)
-  * [Create a Custom Binding](#Create-a-Custom-Binding)
-* [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)
-
-## Getting Started
-
-Yjs does not hava any dependencies. Install this package with your favorite package manager, or just copy the files into your project.
-
-```sh
-npm i yjs
-```
-
-##### Tutorial
-
-In this *short* tutorial I will give an overview of the basic concepts in Yjs.
-
-Yjs itself only knows how to do conflict resolution. You need to choose a provider, that handles how document updates are distributed over the network.
-
-We will start by running a websocket server (part of the [websocket provider](#Websocket-Provider)):
-
-```sh
-PORT=1234 node ./node_modules/yjs/provider/websocket/server.js
-```
-
-The following client-side code connects to the websocket server and opens a shared document.
-
-```js
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'yjs/provider/websocket.js'
-
-const provider = new WebsocketProvider('http://localhost:1234')
-const sharedDocument = provider.get('my-favourites')
-```
-
-All content created in a shared document is shared among all peers that request the same document. Now we define types on the shared document:
-
-```js
-sharedDocument.define('movie-ratings', Y.Map)
-sharedDocument.define('favourite-food', Y.Array)
-```
-
-All clients that define `'movie-ratings'` as `Y.Map` on the shared document named `'my-favourites'` have access to the same shared type. Example:
-
-**Client 1:**
-
-```js
-sharedDocument.define('movie-ratings', Y.Map)
-sharedDocument.define('favourite-food', Y.Array)
-
-const movies = sharedDocument.get('movie-ratings')
-const food = sharedDocument.get('fovourite-food')
-
-movies.set('deadpool', 10)
-food.insert(0, ['burger'])
-```
-
-**Client 2:**
-
-```js
-sharedDocument.define('movie-ratings', Y.Map)
-sharedDocument.define('favourite-food', Y.Map) // <- note that this definition differs from client1
-
-const movies = sharedDocument.get('movie-ratings')
-const food = sharedDocument.get('fovourite-food')
-
-movies.set('yt rewind', -10)
-food.set('pancake', 10)
-
-// after some time, when client1 and client2 synced, the movie list will be merged:
-movies.toJSON() // => { 'deadpool': 10, 'yt rewind': -10 }
-
-// But since client1 and client2 defined the types differently,
-// they do not have access to each others food list.
-food.toJSON() // => { pancake: 10 }
-```
-
-Now you understand how types are defined on a shared document. Next you can jump to one of the [tutorials on our website](https://yjs.website/tutorial-prosemirror.html) or continue reading about [Providers](#Providers), [Shared Types](#Shared-Types), and [Bindings](#Bindings).
-
-## Providers
-
-In Yjs, a provider handles the communication channel to *authenticate*, *authorize*, and *exchange document updates*. Yjs ships with some existing providers. 
-
-### Websocket Provider
-
-The websocket provider implements a classical client server model. Clients connect to a single endpoint over websocket. The server distributes awareness information and document updates among clients.
-
-The Websocket Provider is a solid choice if you want a central source that handles authentication and authorization. Websockets also send header information and cookies, so you can use existing authentication mechanisms with this server. I recommend that you slightly adapt the server in `./provider/websocket/server.js` to your needs.
-
-* Supports cross-tab communication. When you open the same document in the same browser, changes on the document are exchanged via cross-tab communication ([Broadcast Channel](https://developer.mozilla.org/en-US/docs/Web/API/Broadcast_Channel_API) and [localStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage) as fallback).
-* Supports exange of awareness information (e.g. cursors)
-
-##### Start a Websocket Server:
-
-```sh
-PORT=1234 node ./node_modules/yjs/provider/websocket/server.js
-```
-
-**Websocket Server with Persistence**
-
-Persist document updates in a LevelDB database.
-
-See [LevelDB Persistence](#LevelDB Persistence) for more info.
-
-```sh
-PORT=1234 YPERSISTENCE=./dbDir node ./node_modules/yjs/provider/websocket/server.js
-```
-
-##### Client Code:
-
-```js
-import * as Y from 'yjs'
-import { WebsocketProvider } from 'yjs/provider/websocket.js'
-
-const provider = new WebsocketProvider('http://localhost:1234')
-
-// open a websocket connection to http://localhost:1234/my-document-name
-const sharedDocument = provider.get('my-document-name')
-
-sharedDocument.on('status', event => {
-  console.log(event.status) // logs "connected" or "disconnected"
-})
-```
-
-#### Scaling
-
-These are mere suggestions how you could scale your server environment.
-
-**Option 1:** Websocket servers communicate with each other via a PubSub server. A room is represented by a PubSub channel. The downside of this approach is that the same shared document may be handled by many servers. But the upside is that this approach is fault tolerant, does not have a single point of failure, and is perfectly fit for route balancing.
-
-**Option 2:** Sharding with *consistent hashing*. Each document is handled by a unique server. This patterns requires an entity, like etcd, that performs regular health checks and manages servers. Based on the list of available servers (which is managed by etcd) a proxy calculates which server is responsible for each requested document. The disadvantage of this approach is that it is that load distribution may not be fair. Still, this approach may be the preferred solution if you want to store the shared document in a database - e.g. for indexing.
-
-### Ydb Provider
-
-TODO
-
-### Create Custom Provider
-
-A provider is only a concept. I encourage you to implement the same provider interface found above. This makes it easy to exchange communication protocols.
-
-Since providers handle the communication channel, they will necessarily interact with the [binary protocols](#Binary-Protocols). I suggest that you build upon the existing protocols. But you may also implement a custom communication protocol.
-
-Read section [Sync Protocol](#Sync-Protocol) to learn how syncing works.
-
-## Shared Types
-
-A shared type is just a normal data type like [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) or [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array). But a shared type may also be modified by a remote client. Conflicts are automatically resolved by the rules described in this section - but please note that this is only a rough overview of how conflict resolution works. Please read the [Yjs CRDT Algorithm](#Yjs-CRDT-Algorithm) section for an in-depth description of the conflict resolution approach.
-
-As explained in [Tutorial](#Tutorial), a shared type is shared among all peers when they are defined with the same name on the same shared document. I.e.
-
-```js
-sharedDocument.define('my-array', Y.Array)
-
-const myArray = sharedDocument.get('my-array')
-```
-
-You may define a shared types several times, as long as you don't change the type definition.
-
-```js
-sharedDocument.define('my-array', Y.Array)
-
-const myArray = sharedDocument.get('my-array')
-
-const alsoMyArray = sharedDocument.define('my-array', Y.Array)
-
-console.log(myArray === alsoMyArray) // => true
-```
-
-All shared types have an `type.observe(event => ..)` method that allows you to observe any changes. You may also observe all changes on a type and any of its children with the `type.observeDeep(events => ..)` method. Here, `events` is the [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) of events that were fired on type, or any of its children.
-
-All Events inherit from [YEvent](https://yjs.website/module-utils.YEvent.html).
-
-### YMap
-> Complete API docs: [https://yjs.website/module-types.ymap](https://yjs.website/module-types.ymap)
-
-The YMap type is very similar to the JavaScript [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map). 
-
-YMap fires [YMapEvents](https://yjs.website/module-types.YMapEvent.html).
-
-```js
-import * as Y from 'yjs'
-
-const ymap = new Y.Map()
-
-ymap.observe(event => {
-  console.log('ymap keys changed:', event.keysChanged, event.remote)
-})
-
-ymap.set('key', 'value') // => ymap keys changed: Set{ 'key' } false
-ymap.delete('key') // => ymap keys changed: Set{ 'key' }
-
-const ymap2 = new YMap()
-ymap2.set(1, 'two')
-
-ymap.set('type', ymap2) // => ymap keys changed: Set{ 'type' }
-```
-
-##### Concurrent YMap changes
-
-* Concurrent edits on different keys do not affect each other. E.g. if client1 does `ymap.set('a', 1)` and client2 does `ymap.set('b', 2)`, both clients will end up with `YMap{ a: 1, b: 2 }`
-* If client1 and client2 `set` the same property at the same time, the edit from the client with the smaller userID will prevail (`sharedDocument.userID`)
-* If client1 sets a property `ymap.set('a', 1)` and client2 deletes a property `ymap.delete('a')`, the set operation always prevails.
-
-### YArray
-> Complete API docs: [https://yjs.website/module-types.yarray](https://yjs.website/module-types.yarray)
-
-YArray fires [YArrayEvents](https://yjs.website/module-types.YMapEvent.html).
-
-
-```js
-import * as Y from 'yjs'
-
-const yarray = new Y.Array()
-
-yarray.observe(event => {
-  console.log('yarray changed:', event.addedElements, event.removedElements, event.remote)
-})
-
-// insert two elements at position 0
-yarray.insert(0, ['a', 1]) // => yarray changed: Set{Item{'a'}, Item{1}}, Set{}, false 
-console.log(yarray.toArray()) // => ['a', 1]
-yarray.delete(1, 1) // yarray changed: Set{}, Set{Item{1}}, false
-
-yarray.insert(1, new Y.Map()) // => yarray changed: Set{YMap{}}, Set{}, false
-
-// The difference between .toArray and .toJSON:
-console.log(yarray.toArray()) // => ['a', YMap{}]
-console.log(yarray.toJSON()) // => ['a', {}]
-```
-
-As you can see from the above example, primitive data is wrapped into an Item. This makes it possible to find the exact location of the change.
-
-##### Concurrent YArray changes
-
-* YArray internally represents the data as a doubly linked list. The Array `['a', YMap{}, 1]` is internally represented as `Item{'a'} <-> YMap{} <-> Item{1}`. Accordingly, the insert operation `yarray.insert(1, ['b'])` is internally transformed to `insert Item{'b'} between Item{'a'} and YMap{}`.
-* When an Item is deleted, it is only marked as deleted. Only its content is garbage collected and freed from memory.
-* Therefore, the remote operation `insert x between a and b` can still be fulfilled when item `a` or item `b` are deleted.
-* In case that two clients insert content between the same items (a concurrent insertion), the order of the insertions is decided based on the `sharedDocument.userID`.
-
-### YText
-> Complete API docs: [https://yjs.website/module-types.ytext](https://yjs.website/module-types.ytext)
-
-A YText is basically a [YArray](#YArray) that is optimized for text content. 
-
-### YXmlFragment and YXmlElement
-> Complete API docs: [https://yjs.website/module-types.yxmlfragment](https://yjs.website/module-types.yxmlfragment) and [https://yjs.website/module-types.yxmlelement](https://yjs.website/module-types.yxmlelement)
-
-### Custom Types
-
-## Bindings
-
-## Transaction
-
-
-
-## Binary 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,
-    ..
-  },
-  "include": [
-    "./node_modules/yjs/"
-  ]
-}
-```
-
-## CRDT Algorithm
-
-## License and Author
-
-Yjs and all related projects are [**MIT licensed**](./LICENSE). Some files also contain an additional copyright notice that allows you to copy and modify the code without shipping the copyright notice (e.g. `./provider/websocket/WebsocketProvider.js` and `./provider/websocket/server.js`)
-
-Yjs is based on the research I did as a student at the RWTH i5. I am working on Yjs in my spare time. Please help me by donating or hiring me for consulting, so I can continue to work on this project.
-
-kevin.jahns@protonmail.com

bindings/codemirror.js

@@ -1,180 +0,0 @@
-/**
- * @module bindings/textarea
- */
-
-import { createMutex } from '../lib/mutex.js'
-import * as math from '../lib/math.js'
-import * as ypos from '../utils/relativePosition.js'
-
-const typeObserver = (binding, event) => {
-  binding._mux(() => {
-    const cm = binding.target
-    cm.operation(() => {
-      const delta = event.delta
-      let index = 0
-      for (let i = 0; i < event.delta.length; i++) {
-        const d = delta[i]
-        if (d.retain) {
-          index += d.retain
-        } else if (d.insert) {
-          const pos = cm.posFromIndex(index)
-          cm.replaceRange(d.insert, pos, pos, 'prosemirror-binding')
-          index += d.insert.length
-        } else if (d.delete) {
-          const start = cm.posFromIndex(index)
-          const end = cm.posFromIndex(index + d.delete)
-          cm.replaceRange('', start, end, 'prosemirror-binding')
-        }
-      }
-    })
-  })
-}
-
-const targetObserver = (binding, change) => {
-  binding._mux(() => {
-    const start = binding.target.indexFromPos(change.from)
-    const delLen = change.removed.map(s => s.length).reduce(math.add) + change.removed.length - 1
-    if (delLen > 0) {
-      binding.type.delete(start, delLen)
-    }
-    if (change.text.length > 0) {
-      binding.type.insert(start, change.text.join('\n'))
-    }
-  })
-}
-
-const createRemoteCaret = (username, color) => {
-  const caret = document.createElement('span')
-  caret.classList.add('remote-caret')
-  caret.setAttribute('style', `border-color: ${color}`)
-  const userDiv = document.createElement('div')
-  userDiv.setAttribute('style', `background-color: ${color}`)
-  userDiv.insertBefore(document.createTextNode(username), null)
-  caret.insertBefore(userDiv, null)
-  return caret
-}
-
-const updateRemoteSelection = (y, cm, type, cursors, clientId) => {
-  // destroy current text mark
-  const m = cursors.get(clientId)
-  if (m !== undefined) {
-    m.caret.clear()
-    if (m.sel !== null) {
-      m.sel.clear()
-    }
-    cursors.delete(clientId)
-  }
-  // redraw caret and selection for clientId
-  const aw = y.awareness.get(clientId)
-  if (aw === undefined) {
-    return
-  }
-  const user = aw.user || {}
-  if (user.color == null) {
-    user.color = '#ffa500'
-  }
-  if (user.name == null) {
-    user.name = `User: ${clientId}`
-  }
-  const cursor = aw.cursor
-  if (cursor == null || cursor.anchor == null || cursor.head == null) {
-    return
-  }
-  const anchor = ypos.fromRelativePosition(y, cursor.anchor || null)
-  const head = ypos.fromRelativePosition(y, cursor.head || null)
-  if (anchor !== null && head !== null && anchor.type === type && head.type === type) {
-    const headpos = cm.posFromIndex(head.offset)
-    const anchorpos = cm.posFromIndex(anchor.offset)
-    let from, to
-    if (head.offset < anchor.offset) {
-      from = headpos
-      to = anchorpos
-    } else {
-      from = anchorpos
-      to = headpos
-    }
-    const caretEl = createRemoteCaret(user.name, user.color)
-    const caret = cm.setBookmark(headpos, { widget: caretEl, insertLeft: true })
-    let sel = null
-    if (head.offset !== anchor.offset) {
-      sel = cm.markText(from, to, { css: `background-color: ${user.color}70`, inclusiveRight: true, inclusiveLeft: false })
-    }
-    cursors.set(clientId, { caret, sel })
-  }
-}
-
-const prosemirrorCursorActivity = (y, cm, type) => {
-  if (!cm.hasFocus()) {
-    return
-  }
-  const aw = y.getLocalAwarenessInfo()
-  const anchor = ypos.getRelativePosition(type, cm.indexFromPos(cm.getCursor('anchor')))
-  const head = ypos.getRelativePosition(type, cm.indexFromPos(cm.getCursor('head')))
-  if (aw.cursor == null || !ypos.equal(aw.cursor.anchor, anchor) || !ypos.equal(aw.cursor.head, head)) {
-    y.setAwarenessField('cursor', {
-      anchor, head
-    })
-  }
-}
-
-/**
- * A binding that binds a YText to a CodeMirror editor.
- *
- * @example
- *   const ytext = ydocument.define('codemirror', Y.Text)
- *   const editor = new CodeMirror(document.querySelector('#container'), {
- *     mode: 'javascript',
- *     lineNumbers: true
- *   })
- *   const binding = new CodeMirrorBinding(editor)
- *
- */
-export class CodeMirrorBinding {
-  /**
-   * @param {YText} textType
-   * @param {CodeMirror} codeMirror
-   * @param {Object} [options={cursors: true}]
-   */
-  constructor (textType, codeMirror, { cursors = true } = {}) {
-    const y = textType._y
-    this.type = textType
-    this.target = codeMirror
-    /**
-     * @private
-     */
-    this._mux = createMutex()
-    // set initial value
-    codeMirror.setValue(textType.toString())
-    // observe type and target
-    this._typeObserver = event => typeObserver(this, event)
-    this._targetObserver = (_, change) => targetObserver(this, change)
-    this._cursors = new Map()
-    this._awarenessListener = event => {
-      const f = clientId => updateRemoteSelection(y, codeMirror, textType, this._cursors, clientId)
-      event.added.forEach(f)
-      event.removed.forEach(f)
-      event.updated.forEach(f)
-    }
-    this._cursorListener = () => prosemirrorCursorActivity(y, codeMirror, textType)
-    this._blurListeer = () =>
-      y.setAwarenessField('cursor', null)
-    textType.observe(this._typeObserver)
-    codeMirror.on('change', this._targetObserver)
-    if (cursors) {
-      y.on('awareness', this._awarenessListener)
-      codeMirror.on('cursorActivity', this._cursorListener)
-      codeMirror.on('blur', this._blurListeer)
-      codeMirror.on('focus', this._cursorListener)
-    }
-  }
-  destroy () {
-    this.type.unobserve(this._typeObserver)
-    this.target.off('change', this._targetObserver)
-    this.type.off('awareness', this._awarenessListener)
-    this.target.off('cursorActivity', this._cursorListener)
-    this.target.off('focus', this._cursorListener)
-    this.target.off('blur', this._blurListeer)
-    this.type = null
-    this.target = null
-  }
-}

bindings/dom.js

@@ -1 +0,0 @@
-export * from './dom/DomBinding.js'

bindings/dom/DomBinding.js

@@ -1,248 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-/* global MutationObserver, getSelection */
-
-import { fromRelativePosition } from '../../utils/relativePosition.js'
-import { createMutex } from '../../lib/mutex.js'
-import { createAssociation, removeAssociation } from './util.js'
-import { beforeTransactionSelectionFixer, afterTransactionSelectionFixer, getCurrentRelativeSelection } from './selection.js'
-import { defaultFilter, applyFilterOnType } from './filter.js'
-import { typeObserver } from './typeObserver.js'
-import { domObserver } from './domObserver.js'
-import { YXmlFragment } from '../../types/YXmlElement.js' // eslint-disable-line
-
-/**
- * @callback DomFilter
- * @param {string} nodeName
- * @param {Map<string, string>} attrs
- * @return {Map | null}
- */
-
-/**
- * A binding that binds the children of a YXmlFragment to a DOM element.
- *
- * This binding is automatically destroyed when its parent is deleted.
- *
- * @example
- * const div = document.createElement('div')
- * const type = y.define('xml', Y.XmlFragment)
- * const binding = new Y.QuillBinding(type, div)
- *
- * @class
- */
-export class DomBinding {
-  /**
-   * @param {YXmlFragment} type The bind source. This is the ultimate source of
-   *                            truth.
-   * @param {Element} target The bind target. Mirrors the target.
-   * @param {Object} [opts] Optional configurations
-
-   * @param {DomFilter} [opts.filter=defaultFilter] The filter function to use.
-   * @param {Document} [opts.document=document] The filter function to use.
-   * @param {Object} [opts.hooks] The filter function to use.
-   * @param {Element} [opts.scrollingElement=null] The filter function to use.
-   */
-  constructor (type, target, opts = {}) {
-    // Binding handles textType as this.type and domTextarea as this.target
-    /**
-     * The Yjs type that is bound to `target`
-     * @type {YXmlFragment}
-     */
-    this.type = type
-    /**
-     * The target that `type` is bound to.
-     * @type {Element}
-     */
-    this.target = target
-    /**
-     * @private
-     */
-    this._mutualExclude = createMutex()
-    this.opts = opts
-    opts.document = opts.document || document
-    opts.hooks = opts.hooks || {}
-    this.scrollingElement = opts.scrollingElement || null
-    /**
-     * Maps each DOM element to the type that it is associated with.
-     * @type {Map}
-     */
-    this.domToType = new Map()
-    /**
-     * Maps each YXml type to the DOM element that it is associated with.
-     * @type {Map}
-     */
-    this.typeToDom = new Map()
-    /**
-     * Defines which DOM attributes and elements to filter out.
-     * Also filters remote changes.
-     * @type {DomFilter}
-     */
-    this.filter = opts.filter || defaultFilter
-    // set initial value
-    target.innerHTML = ''
-    type.forEach(child => {
-      target.insertBefore(child.toDom(opts.document, opts.hooks, this), null)
-    })
-    this._typeObserver = typeObserver.bind(this)
-    this._domObserver = mutations => {
-      domObserver.call(this, mutations, opts.document)
-    }
-    type.observeDeep(this._typeObserver)
-    this._mutationObserver = new MutationObserver(this._domObserver)
-    this._mutationObserver.observe(target, {
-      childList: true,
-      attributes: true,
-      characterData: true,
-      subtree: true
-    })
-    this._currentSel = null
-    this._selectionchange = () => {
-      this._currentSel = getCurrentRelativeSelection(this)
-    }
-    document.addEventListener('selectionchange', this._selectionchange)
-    const y = type._y
-    this.y = y
-    // Force flush dom changes before Type changes are applied (they might
-    // modify the dom)
-    this._beforeTransactionHandler = y => {
-      this._domObserver(this._mutationObserver.takeRecords())
-      this._mutualExclude(() => {
-        beforeTransactionSelectionFixer(this)
-      })
-    }
-    y.on('beforeTransaction', this._beforeTransactionHandler)
-    this._afterTransactionHandler = (y, transaction) => {
-      this._mutualExclude(() => {
-        afterTransactionSelectionFixer(this)
-      })
-      // remove associations
-      // TODO: this could be done more efficiently
-      // e.g. Always delete using the following approach, or removeAssociation
-      // in dom/type-observer..
-      transaction.deletedStructs.forEach(type => {
-        const dom = this.typeToDom.get(type)
-        if (dom !== undefined) {
-          removeAssociation(this, dom, type)
-        }
-      })
-    }
-    y.on('afterTransaction', this._afterTransactionHandler)
-    // Before calling observers, apply dom filter to all changed and new types.
-    this._beforeObserverCallsHandler = (y, transaction) => {
-      // Apply dom filter to new and changed types
-      transaction.changedTypes.forEach((subs, type) => {
-        // Only check attributes. New types are filtered below.
-        if ((subs.size > 1 || (subs.size === 1 && subs.has(null) === false))) {
-          applyFilterOnType(y, this, type)
-        }
-      })
-      transaction.newTypes.forEach(type => {
-        applyFilterOnType(y, this, type)
-      })
-    }
-    y.on('beforeObserverCalls', this._beforeObserverCallsHandler)
-    createAssociation(this, target, type)
-  }
-
-  flushDomChanges () {
-    this._domObserver(this._mutationObserver.takeRecords())
-  }
-
-  /**
-   * NOTE:
-   * * does not apply filter to existing elements!
-   * * only guarantees that changes are filtered locally. Remote sites may see different content.
-   *
-   * @param {DomFilter} filter The filter function to use from now on.
-   */
-  setFilter (filter) {
-    this.filter = filter
-    // TODO: apply filter to all elements
-  }
-
-  _getUndoStackInfo () {
-    return this.getSelection()
-  }
-
-  _restoreUndoStackInfo (info) {
-    this.restoreSelection(info)
-  }
-
-  getSelection () {
-    return this._currentSel
-  }
-
-  restoreSelection (selection) {
-    if (selection !== null) {
-      const { to, from } = selection
-      /**
-       * There is little information on the difference between anchor/focus and base/extent.
-       * MDN doesn't even mention base/extent anymore.. though you still have to call
-       * setBaseAndExtent to change the selection..
-       * I can observe that base/extend refer to notes higher up in the xml hierachy.
-       * Espesially for undo/redo this is preferred. If this becomes a problem in the future,
-       * we should probably go back to anchor/focus.
-       */
-      const browserSelection = getSelection()
-      let { baseNode, baseOffset, extentNode, extentOffset } = browserSelection
-      if (from !== null) {
-        let sel = fromRelativePosition(this.y, from)
-        if (sel !== null) {
-          let node = this.typeToDom.get(sel.type)
-          let offset = sel.offset
-          if (node !== baseNode || offset !== baseOffset) {
-            baseNode = node
-            baseOffset = offset
-          }
-        }
-      }
-      if (to !== null) {
-        let sel = fromRelativePosition(this.y, to)
-        if (sel !== null) {
-          let node = this.typeToDom.get(sel.type)
-          let offset = sel.offset
-          if (node !== extentNode || offset !== extentOffset) {
-            extentNode = node
-            extentOffset = offset
-          }
-        }
-      }
-      browserSelection.setBaseAndExtent(
-        baseNode,
-        baseOffset,
-        extentNode,
-        extentOffset
-      )
-    }
-  }
-
-  /**
-   * Remove all properties that are handled by this class.
-   */
-  destroy () {
-    this.domToType = null
-    this.typeToDom = null
-    this.type.unobserveDeep(this._typeObserver)
-    this._mutationObserver.disconnect()
-    const y = this.type._y
-    y.off('beforeTransaction', this._beforeTransactionHandler)
-    y.off('beforeObserverCalls', this._beforeObserverCallsHandler)
-    y.off('afterTransaction', this._afterTransactionHandler)
-    document.removeEventListener('selectionchange', this._selectionchange)
-    this.type = null
-    this.target = null
-  }
-}
-
-/**
- * A filter defines which elements and attributes to share.
- * Return null if the node should be filtered. Otherwise return the Map of
- * accepted attributes.
- *
- * @callback FilterFunction
- * @param {string} nodeName
- * @param {Map} attrs
- * @return {Map|null}
- */

bindings/dom/domObserver.js

@@ -1,150 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-import { YXmlHook } from '../../types/YXmlHook.js'
-import {
-  iterateUntilUndeleted,
-  removeAssociation,
-  insertNodeHelper } from './util.js'
-import { simpleDiff } from '../../lib/diff.js'
-import { YXmlFragment } from '../../types/YXmlElement.js'
-
-/**
- * 1. Check if any of the nodes was deleted
- * 2. Iterate over the children.
- *    2.1 If a node exists that is not yet bound to a type, insert a new node
- *    2.2 If _contents.length < dom.childNodes.length, fill the
- *        rest of _content with childNodes
- *    2.3 If a node was moved, delete it and
- *       recreate a new yxml element that is bound to that node.
- *       You can detect that a node was moved because expectedId
- *       !== actualId in the list
- *
- * @function
- * @private
- */
-const applyChangesFromDom = (binding, dom, yxml, _document) => {
-  if (yxml == null || yxml === false || yxml.constructor === YXmlHook) {
-    return
-  }
-  const y = yxml._y
-  const knownChildren = new Set()
-  for (let i = dom.childNodes.length - 1; i >= 0; i--) {
-    const type = binding.domToType.get(dom.childNodes[i])
-    if (type !== undefined && type !== false) {
-      knownChildren.add(type)
-    }
-  }
-  // 1. Check if any of the nodes was deleted
-  yxml.forEach(childType => {
-    if (knownChildren.has(childType) === false) {
-      childType._delete(y)
-      removeAssociation(binding, binding.typeToDom.get(childType), childType)
-    }
-  })
-  // 2. iterate
-  const childNodes = dom.childNodes
-  const len = childNodes.length
-  let prevExpectedType = null
-  let expectedType = iterateUntilUndeleted(yxml._start)
-  for (let domCnt = 0; domCnt < len; domCnt++) {
-    const childNode = childNodes[domCnt]
-    const childType = binding.domToType.get(childNode)
-    if (childType !== undefined) {
-      if (childType === false) {
-        // should be ignored or is going to be deleted
-        continue
-      }
-      if (expectedType !== null) {
-        if (expectedType !== childType) {
-          // 2.3 Not expected node
-          if (childType._parent !== yxml) {
-            // child was moved from another parent
-            // childType is going to be deleted by its previous parent
-            removeAssociation(binding, childNode, childType)
-          } else {
-            // child was moved to a different position.
-            removeAssociation(binding, childNode, childType)
-            childType._delete(y)
-          }
-          prevExpectedType = insertNodeHelper(yxml, prevExpectedType, childNode, _document, binding)
-        } else {
-          // Found expected node. Continue.
-          prevExpectedType = expectedType
-          expectedType = iterateUntilUndeleted(expectedType._right)
-        }
-      } else {
-        // 2.2 Fill _content with child nodes
-        prevExpectedType = insertNodeHelper(yxml, prevExpectedType, childNode, _document, binding)
-      }
-    } else {
-      // 2.1 A new node was found
-      prevExpectedType = insertNodeHelper(yxml, prevExpectedType, childNode, _document, binding)
-    }
-  }
-}
-
-/**
- * @private
- * @function
- */
-export function domObserver (mutations, _document) {
-  this._mutualExclude(() => {
-    this.type._y.transact(() => {
-      let diffChildren = new Set()
-      mutations.forEach(mutation => {
-        const dom = mutation.target
-        const yxml = this.domToType.get(dom)
-        if (yxml === undefined) { // In case yxml is undefined, we double check if we forgot to bind the dom
-          let parent = dom
-          let yParent
-          do {
-            parent = parent.parentElement
-            yParent = this.domToType.get(parent)
-          } while (yParent === undefined && parent !== null)
-          if (yParent !== false && yParent !== undefined && yParent.constructor !== YXmlHook) {
-            diffChildren.add(parent)
-          }
-          return
-        } else if (yxml === false || yxml.constructor === YXmlHook) {
-          // dom element is filtered / a dom hook
-          return
-        }
-        switch (mutation.type) {
-          case 'characterData':
-            var change = simpleDiff(yxml.toString(), dom.nodeValue)
-            yxml.delete(change.pos, change.remove)
-            yxml.insert(change.pos, change.insert)
-            break
-          case 'attributes':
-            if (yxml.constructor === YXmlFragment) {
-              break
-            }
-            let name = mutation.attributeName
-            let val = dom.getAttribute(name)
-            // check if filter accepts attribute
-            let attributes = new Map()
-            attributes.set(name, val)
-            if (yxml.constructor !== YXmlFragment && this.filter(dom.nodeName, attributes).size > 0) {
-              if (yxml.getAttribute(name) !== val) {
-                if (val == null) {
-                  yxml.removeAttribute(name)
-                } else {
-                  yxml.setAttribute(name, val)
-                }
-              }
-            }
-            break
-          case 'childList':
-            diffChildren.add(mutation.target)
-            break
-        }
-      })
-      for (let dom of diffChildren) {
-        const yxml = this.domToType.get(dom)
-        applyChangesFromDom(this, dom, yxml, _document)
-      }
-    })
-  })
-}

bindings/dom/domToType.js

@@ -1,74 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-/* eslint-env browser */
-import { YXmlText } from '../../types/YXmlText.js'
-import { YXmlHook } from '../../types/YXmlHook.js'
-import { YXmlElement } from '../../types/YXmlElement.js'
-import { createAssociation, domsToTypes } from './util.js'
-import { filterDomAttributes, defaultFilter } from './filter.js'
-import { DomBinding } from './DomBinding.js' // eslint-disable-line
-
-/**
- * @callback DomFilter
- * @param {string} nodeName
- * @param {Map<string, string>} attrs
- * @return {Map | null}
- */
-
-/**
- * Creates a Yjs type (YXml) based on the contents of a DOM Element.
- *
- * @function
- * @param {Element|Text} element The DOM Element
- * @param {?Document} _document Optional. Provide the global document object
- * @param {Object<string, any>} [hooks = {}] Optional. Set of Yjs Hooks
- * @param {DomFilter} [filter=defaultFilter] Optional. Dom element filter
- * @param {?DomBinding} binding Warning: This property is for internal use only!
- * @return {YXmlElement | YXmlText | false}
- */
-export const domToType = (element, _document = document, hooks = {}, filter = defaultFilter, binding) => {
-  /**
-   * @type {any}
-   */
-  let type = null
-  if (element instanceof Element) {
-    let hookName = null
-    let hook
-    // configure `hookName !== undefined` if element is a hook.
-    if (element.hasAttribute('data-yjs-hook')) {
-      hookName = element.getAttribute('data-yjs-hook')
-      hook = hooks[hookName]
-      if (hook === undefined) {
-        console.error(`Unknown hook "${hookName}". Deleting yjsHook dataset property.`)
-        element.removeAttribute('data-yjs-hook')
-        hookName = null
-      }
-    }
-    if (hookName === null) {
-      // Not a hook
-      const attrs = filterDomAttributes(element, filter)
-      if (attrs === null) {
-        type = false
-      } else {
-        type = new YXmlElement(element.nodeName)
-        attrs.forEach((val, key) => {
-          type.setAttribute(key, val)
-        })
-        type.insert(0, domsToTypes(element.childNodes, document, hooks, filter, binding))
-      }
-    } else {
-      // Is a hook
-      type = new YXmlHook(hookName)
-      hook.fillType(element, type)
-    }
-  } else if (element instanceof Text) {
-    type = new YXmlText()
-    type.insert(0, element.nodeValue)
-  } else {
-    throw new Error('Can\'t transform this node type to a YXml type!')
-  }
-  createAssociation(binding, element, type)
-  return type
-}

bindings/dom/filter.js

@@ -1,71 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-import { Y } from '../../utils/Y.js' // eslint-disable-line
-import { YXmlElement, YXmlFragment } from '../../types/YXmlElement.js' // eslint-disable-line
-import { isParentOf } from '../../utils/isParentOf.js'
-import { DomBinding } from './DomBinding.js' // eslint-disable-line
-
-/**
- * Default filter method (does nothing).
- *
- * @function
- * @param {String} nodeName The nodeName of the element
- * @param {Map} attrs Map of key-value pairs that are attributes of the node.
- * @return {Map | null} The allowed attributes or null, if the element should be
- *                      filtered.
- */
-export const defaultFilter = (nodeName, attrs) => {
-  // TODO: implement basic filter that filters out dangerous properties!
-  return attrs
-}
-
-/**
- * @private
- * @function
- * @param {Element} dom
- * @param {Function} filter
- */
-export const filterDomAttributes = (dom, filter) => {
-  const attrs = new Map()
-  for (let i = dom.attributes.length - 1; i >= 0; i--) {
-    const attr = dom.attributes[i]
-    attrs.set(attr.name, attr.value)
-  }
-  return filter(dom.nodeName, attrs)
-}
-
-/**
- * Applies a filter on a type.
- *
- * @private
- * @function
- * @param {Y} y The Yjs instance.
- * @param {DomBinding} binding The DOM binding instance that has the dom filter.
- * @param {YXmlElement | YXmlFragment } type The type to apply the filter to.
- */
-export const applyFilterOnType = (y, binding, type) => {
-  if (isParentOf(binding.type, type) && type instanceof YXmlElement) {
-    const nodeName = type.nodeName
-    let attributes = new Map()
-    if (type.getAttributes !== undefined) {
-      let attrs = type.getAttributes()
-      for (let key in attrs) {
-        attributes.set(key, attrs[key])
-      }
-    }
-    const filteredAttributes = binding.filter(nodeName, new Map(attributes))
-    if (filteredAttributes === null) {
-      type._delete(y, true)
-    } else {
-      // iterate original attributes
-      attributes.forEach((value, key) => {
-        // delete all attributes that are not in filteredAttributes
-        if (filteredAttributes.has(key) === false) {
-          type.removeAttribute(key)
-        }
-      })
-    }
-  }
-}

bindings/dom/selection.js

@@ -1,49 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-/* globals getSelection */
-
-import { getRelativePosition } from '../../utils/relativePosition.js'
-
-let relativeSelection = null
-
-/**
- * @private
- */
-const _getCurrentRelativeSelection = domBinding => {
-  const { baseNode, baseOffset, extentNode, extentOffset } = getSelection()
-  const baseNodeType = domBinding.domToType.get(baseNode)
-  const extentNodeType = domBinding.domToType.get(extentNode)
-  if (baseNodeType !== undefined && extentNodeType !== undefined) {
-    return {
-      from: getRelativePosition(baseNodeType, baseOffset),
-      to: getRelativePosition(extentNodeType, extentOffset)
-    }
-  }
-  return null
-}
-
-/**
- * @private
- */
-export const getCurrentRelativeSelection = typeof getSelection !== 'undefined' ? _getCurrentRelativeSelection : domBinding => null
-
-/**
- * @private
- */
-export const beforeTransactionSelectionFixer = domBinding => {
-  relativeSelection = getCurrentRelativeSelection(domBinding)
-}
-
-/**
- * Reset the browser range after every transaction.
- * This prevents any collapsing issues with the local selection.
- *
- * @private
- */
-export const afterTransactionSelectionFixer = domBinding => {
-  if (relativeSelection !== null) {
-    domBinding.restoreSelection(relativeSelection)
-  }
-}

bindings/dom/typeObserver.js

@@ -1,110 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-/* eslint-env browser */
-/* global getSelection */
-
-import { YXmlText } from '../../types/YXmlText.js'
-import { YXmlHook } from '../../types/YXmlHook.js'
-import { removeDomChildrenUntilElementFound } from './util.js'
-
-const findScrollReference = scrollingElement => {
-  if (scrollingElement !== null) {
-    let anchor = getSelection().anchorNode
-    if (anchor == null) {
-      let children = scrollingElement.children // only iterate through non-text nodes
-      for (let i = 0; i < children.length; i++) {
-        const elem = children[i]
-        const rect = elem.getBoundingClientRect()
-        if (rect.top >= 0) {
-          return { elem, top: rect.top }
-        }
-      }
-    } else {
-      /**
-       * @type {Element}
-       */
-      let elem = anchor.parentElement
-      if (anchor instanceof Element) {
-        elem = anchor
-      }
-      return {
-        elem,
-        top: elem.getBoundingClientRect().top
-      }
-    }
-  }
-  return null
-}
-
-const fixScroll = (scrollingElement, ref) => {
-  if (ref !== null) {
-    const { elem, top } = ref
-    const currentTop = elem.getBoundingClientRect().top
-    const newScroll = scrollingElement.scrollTop + currentTop - top
-    if (newScroll >= 0) {
-      scrollingElement.scrollTop = newScroll
-    }
-  }
-}
-
-/**
- * @private
- */
-export const typeObserver = function (events) {
-  this._mutualExclude(() => {
-    const scrollRef = findScrollReference(this.scrollingElement)
-    events.forEach(event => {
-      const yxml = event.target
-      const dom = this.typeToDom.get(yxml)
-      if (dom !== undefined && dom !== false) {
-        if (yxml.constructor === YXmlText) {
-          dom.nodeValue = yxml.toString()
-        } else if (event.attributesChanged !== undefined) {
-          // update attributes
-          event.attributesChanged.forEach(attributeName => {
-            const value = yxml.getAttribute(attributeName)
-            if (value === undefined) {
-              dom.removeAttribute(attributeName)
-            } else {
-              dom.setAttribute(attributeName, value)
-            }
-          })
-          /*
-           * TODO: instead of hard-checking the types, it would be best to
-           *       specify the type's features. E.g.
-           *         - _yxmlHasAttributes
-           *         - _yxmlHasChildren
-           *       Furthermore, the features shouldn't be encoded in the types,
-           *       only in the attributes (above)
-           */
-          if (event.childListChanged && yxml.constructor !== YXmlHook) {
-            let currentChild = dom.firstChild
-            yxml.forEach(childType => {
-              const childNode = this.typeToDom.get(childType)
-              switch (childNode) {
-                case undefined:
-                  // Does not exist. Create it.
-                  const node = childType.toDom(this.opts.document, this.opts.hooks, this)
-                  dom.insertBefore(node, currentChild)
-                  break
-                case false:
-                  // nop
-                  break
-                default:
-                  // Is already attached to the dom.
-                  // Find it and remove all dom nodes in-between.
-                  removeDomChildrenUntilElementFound(dom, currentChild, childNode)
-                  currentChild = childNode.nextSibling
-                  break
-              }
-            })
-            removeDomChildrenUntilElementFound(dom, currentChild, null)
-          }
-        }
-      }
-    })
-    fixScroll(this.scrollingElement, scrollRef)
-  })
-}

bindings/dom/util.js

@@ -1,135 +0,0 @@
-/**
- * @module bindings/dom
- */
-
-import { domToType } from './domToType.js'
-import { DomBinding } from './DomBinding.js' // eslint-disable-line
-
-/**
- * Iterates items until an undeleted item is found.
- *
- * @private
- */
-export const iterateUntilUndeleted = item => {
-  while (item !== null && item._deleted) {
-    item = item._right
-  }
-  return item
-}
-
-/**
- * Removes an association (the information that a DOM element belongs to a
- * type).
- *
- * @private
- * @function
- * @param {DomBinding} domBinding The binding object
- * @param {Element} dom The dom that is to be associated with type
- * @param {YXmlElement|YXmlHook} type The type that is to be associated with dom
- *
- */
-export const removeAssociation = (domBinding, dom, type) => {
-  domBinding.domToType.delete(dom)
-  domBinding.typeToDom.delete(type)
-}
-
-/**
- * Creates an association (the information that a DOM element belongs to a
- * type).
- *
- * @private
- * @function
- * @param {DomBinding} domBinding The binding object
- * @param {DocumentFragment|Element|Text} dom The dom that is to be associated with type
- * @param {YXmlFragment|YXmlElement|YXmlHook|YXmlText} type The type that is to be associated with dom
- *
- */
-export const createAssociation = (domBinding, dom, type) => {
-  if (domBinding !== undefined) {
-    domBinding.domToType.set(dom, type)
-    domBinding.typeToDom.set(type, dom)
-  }
-}
-
-/**
- * If oldDom is associated with a type, associate newDom with the type and
- * forget about oldDom. If oldDom is not associated with any type, nothing happens.
- *
- * @private
- * @function
- * @param {DomBinding} domBinding The binding object
- * @param {Element} oldDom The existing dom
- * @param {Element} newDom The new dom object
- */
-export const switchAssociation = (domBinding, oldDom, newDom) => {
-  if (domBinding !== undefined) {
-    const type = domBinding.domToType.get(oldDom)
-    if (type !== undefined) {
-      removeAssociation(domBinding, oldDom, type)
-      createAssociation(domBinding, newDom, type)
-    }
-  }
-}
-
-/**
- * Insert Dom Elements after one of the children of this YXmlFragment.
- * The Dom elements will be bound to a new YXmlElement and inserted at the
- * specified position.
- *
- * @private
- * @function
- * @param {YXmlElement} type The type in which to insert DOM elements.
- * @param {YXmlElement|null} prev The reference node. New YxmlElements are
- *                           inserted after this node. Set null to insert at
- *                           the beginning.
- * @param {Array<Element>} doms The Dom elements to insert.
- * @param {?Document} _document Optional. Provide the global document object.
- * @param {DomBinding} binding The dom binding
- * @return {Array<YXmlElement>} The YxmlElements that are inserted.
- */
-export const insertDomElementsAfter = (type, prev, doms, _document, binding) => {
-  const types = domsToTypes(doms, _document, binding.opts.hooks, binding.filter, binding)
-  return type.insertAfter(prev, types)
-}
-
-export const domsToTypes = (doms, _document, hooks, filter, binding) => {
-  const types = []
-  for (let dom of doms) {
-    const t = domToType(dom, _document, hooks, filter, binding)
-    if (t !== false) {
-      types.push(t)
-    }
-  }
-  return types
-}
-
-/**
- * @private
- * @function
- */
-export const insertNodeHelper = (yxml, prevExpectedNode, child, _document, binding) => {
-  let insertedNodes = insertDomElementsAfter(yxml, prevExpectedNode, [child], _document, binding)
-  if (insertedNodes.length > 0) {
-    return insertedNodes[0]
-  } else {
-    return prevExpectedNode
-  }
-}
-
-/**
- * Remove children until `elem` is found.
- *
- * @private
- * @function
- * @param {Element} parent The parent of `elem` and `currentChild`.
- * @param {Node} currentChild Start removing elements with `currentChild`. If
- *                               `currentChild` is `elem` it won't be removed.
- * @param {Element|null} elem The elemnt to look for.
- */
-export const removeDomChildrenUntilElementFound = (parent, currentChild, elem) => {
-  while (currentChild !== elem) {
-    const del = currentChild
-    currentChild = currentChild.nextSibling
-    parent.removeChild(del)
-  }
-}

bindings/prosemirror.js

@@ -1,752 +0,0 @@
-/**
- * @module bindings/prosemirror
- */
-
-import { YText } from '../types/YText.js' // eslint-disable-line
-import { YXmlElement, YXmlFragment } from '../types/YXmlElement.js' // eslint-disable-line
-import { createMutex } from '../lib/mutex.js'
-import * as PModel from 'prosemirror-model'
-import { EditorView,  Decoration, DecorationSet } from 'prosemirror-view' // eslint-disable-line
-import { Plugin, PluginKey, EditorState, TextSelection } from 'prosemirror-state' // eslint-disable-line
-import * as math from '../lib/math.js'
-import * as object from '../lib/object.js'
-import * as YPos from '../utils/relativePosition.js'
-import { isVisible } from '../utils/snapshot.js'
-import { simpleDiff } from '../lib/diff.js'
-
-/**
- * @typedef {Map<YText | YXmlElement | YXmlFragment, PModel.Node>} ProsemirrorMapping
- */
-
-/**
- * The unique prosemirror plugin key for prosemirrorPlugin.
- *
- * @public
- */
-export const prosemirrorPluginKey = new PluginKey('yjs')
-
-/**
- * This plugin listens to changes in prosemirror view and keeps yXmlState and view in sync.
- *
- * This plugin also keeps references to the type and the shared document so other plugins can access it.
- * @param {YXmlFragment} yXmlFragment
- * @return {Plugin} Returns a prosemirror plugin that binds to this type
- */
-export const prosemirrorPlugin = yXmlFragment => {
-  let changedInitialContent = false
-  const plugin = new Plugin({
-    props: {
-      editable: (state) => prosemirrorPluginKey.getState(state).snapshot == null
-    },
-    key: prosemirrorPluginKey,
-    state: {
-      init: (initargs, state) => {
-        return {
-          type: yXmlFragment,
-          y: yXmlFragment._y,
-          binding: null,
-          snapshot: null
-        }
-      },
-      apply: (tr, pluginState) => {
-        const change = tr.getMeta(prosemirrorPluginKey)
-        if (change !== undefined) {
-          pluginState = Object.assign({}, pluginState)
-          for (let key in change) {
-            pluginState[key] = change[key]
-          }
-        }
-        if (pluginState.binding !== null) {
-          if (change !== undefined && change.snapshot !== undefined) {
-            // snapshot changed, rerender next
-            setTimeout(() => {
-              if (change.restore == null) {
-                pluginState.binding._renderSnapshot(change.snapshot, change.prevSnapshot)
-              } else {
-                pluginState.binding._renderSnapshot(change.snapshot, change.snapshot)
-                // reset to current prosemirror state
-                delete pluginState.restore
-                delete pluginState.snapshot
-                delete pluginState.prevSnapshot
-                pluginState.binding._prosemirrorChanged(pluginState.binding.prosemirrorView.state.doc)
-              }
-            }, 0)
-          } else if (pluginState.snapshot == null) {
-            // only apply if no snapshot active
-            // update Yjs state when apply is called. We need to do this here to compute the correct cursor decorations with the cursor plugin
-            if (changedInitialContent || tr.doc.content.size > 4) {
-              changedInitialContent = true
-              pluginState.binding._prosemirrorChanged(tr.doc)
-            }
-          }
-        }
-        return pluginState
-      }
-    },
-    view: view => {
-      const binding = new ProsemirrorBinding(yXmlFragment, view)
-      view.dispatch(view.state.tr.setMeta(prosemirrorPluginKey, { binding }))
-      return {
-        update: () => {
-          const pluginState = plugin.getState(view.state)
-          if (pluginState.snapshot == null) {
-            if (changedInitialContent || view.state.doc.content.size > 4) {
-              changedInitialContent = true
-              binding._prosemirrorChanged(view.state.doc)
-            }
-          }
-        },
-        destroy: () => {
-          binding.destroy()
-        }
-      }
-    }
-  })
-  return plugin
-}
-
-/**
- * The unique prosemirror plugin key for cursorPlugin.type
- *
- * @public
- */
-export const cursorPluginKey = new PluginKey('yjs-cursor')
-
-/**
- * A prosemirror plugin that listens to awareness information on Yjs.
- * This requires that a `prosemirrorPlugin` is also bound to the prosemirror.
- *
- * @public
- */
-export const cursorPlugin = new Plugin({
-  key: cursorPluginKey,
-  props: {
-    decorations: state => {
-      const ystate = prosemirrorPluginKey.getState(state)
-      const y = ystate.y
-      const awareness = y.getAwarenessInfo()
-      const decorations = []
-      if (ystate.snapshot != null) {
-        // do not render cursors while snapshot is active
-        return
-      }
-      awareness.forEach((aw, userID) => {
-        if (userID === y.userID) {
-          return
-        }
-        if (aw.cursor != null) {
-          let user = aw.user || {}
-          if (user.color == null) {
-            user.color = '#ffa500'
-          }
-          if (user.name == null) {
-            user.name = `User: ${userID}`
-          }
-          let anchor = relativePositionToAbsolutePosition(ystate.type, aw.cursor.anchor || null, ystate.binding.mapping)
-          let head = relativePositionToAbsolutePosition(ystate.type, aw.cursor.head || null, ystate.binding.mapping)
-          if (anchor !== null && head !== null) {
-            let maxsize = math.max(state.doc.content.size - 1, 0)
-            anchor = math.min(anchor, maxsize)
-            head = math.min(head, maxsize)
-            decorations.push(Decoration.widget(head, () => {
-              const cursor = document.createElement('span')
-              cursor.classList.add('ProseMirror-yjs-cursor')
-              cursor.setAttribute('style', `border-color: ${user.color}`)
-              const userDiv = document.createElement('div')
-              userDiv.setAttribute('style', `background-color: ${user.color}`)
-              userDiv.insertBefore(document.createTextNode(user.name), null)
-              cursor.insertBefore(userDiv, null)
-              return cursor
-            }, { key: userID + '' }))
-            const from = math.min(anchor, head)
-            const to = math.max(anchor, head)
-            decorations.push(Decoration.inline(from, to, { style: `background-color: ${user.color}70` }))
-          }
-        }
-      })
-      return DecorationSet.create(state.doc, decorations)
-    }
-  },
-  view: view => {
-    const ystate = prosemirrorPluginKey.getState(view.state)
-    const y = ystate.y
-    const awarenessListener = () => {
-      view.updateState(view.state)
-    }
-    const updateCursorInfo = () => {
-      const current = y.getLocalAwarenessInfo()
-      if (view.hasFocus() && ystate.binding !== null) {
-        const anchor = absolutePositionToRelativePosition(view.state.selection.anchor, ystate.type, ystate.binding.mapping)
-        const head = absolutePositionToRelativePosition(view.state.selection.head, ystate.type, ystate.binding.mapping)
-        if (current.cursor == null || !YPos.equal(current.cursor.anchor, anchor) || !YPos.equal(current.cursor.head, head)) {
-          y.setAwarenessField('cursor', {
-            anchor, head
-          })
-        }
-      } else if (current.cursor !== null) {
-        y.setAwarenessField('cursor', null)
-      }
-    }
-    y.on('awareness', awarenessListener)
-    view.dom.addEventListener('focusin', updateCursorInfo)
-    view.dom.addEventListener('focusout', updateCursorInfo)
-    return {
-      update: updateCursorInfo,
-      destroy: () => {
-        const y = prosemirrorPluginKey.getState(view.state).y
-        y.setAwarenessField('cursor', null)
-        y.off('awareness', awarenessListener)
-      }
-    }
-  }
-})
-
-/**
- * Transforms a Prosemirror based absolute position to a Yjs based relative position.
- *
- * @param {number} pos
- * @param {YXmlFragment} type
- * @param {ProsemirrorMapping} mapping
- * @return {any} relative position
- */
-export const absolutePositionToRelativePosition = (pos, type, mapping) => {
-  if (pos === 0) {
-    return YPos.getRelativePosition(type, 0)
-  }
-  let n = type._first
-  if (n !== null) {
-    while (type !== n) {
-      const pNodeSize = (mapping.get(n) || { nodeSize: 0 }).nodeSize
-      if (n.constructor === YText) {
-        if (n.length >= pos) {
-          return YPos.getRelativePosition(n, pos)
-        } else {
-          pos -= n.length
-        }
-        if (n._next !== null) {
-          n = n._next
-        } else {
-          do {
-            n = n._parent
-            pos--
-          } while (n._next === null && n !== type)
-          if (n !== type) {
-            n = n._next
-          }
-        }
-      } else if (n._first !== null && pos < pNodeSize) {
-        n = n._first
-        pos--
-      } else {
-        if (pos === 1 && n.length === 0 && pNodeSize > 1) {
-          // edge case, should end in this paragraph
-          return ['endof', n._id.user, n._id.clock, null, null]
-        }
-        pos -= pNodeSize
-        if (n._next !== null) {
-          n = n._next
-        } else {
-          if (pos === 0) {
-            n = n._parent
-            return ['endof', n._id.user, n._id.clock || null, n._id.name || null, n._id.type || null]
-          }
-          do {
-            n = n._parent
-            pos--
-          } while (n._next === null && n !== type)
-          if (n !== type) {
-            n = n._next
-          }
-        }
-      }
-      if (pos === 0 && n.constructor !== YText && n !== type) { // TODO: set to <= 0
-        return [n._id.user, n._id.clock]
-      }
-    }
-  }
-  return YPos.getRelativePosition(type, type.length)
-}
-
-/**
- * @param {YXmlFragment} yDoc Top level type that is bound to pView
- * @param {any} relPos Encoded Yjs based relative position
- * @param {ProsemirrorMapping} mapping
- */
-export const relativePositionToAbsolutePosition = (yDoc, relPos, mapping) => {
-  const decodedPos = YPos.fromRelativePosition(yDoc._y, relPos)
-  if (decodedPos === null) {
-    return null
-  }
-  let type = decodedPos.type
-  let pos = 0
-  if (type.constructor === YText) {
-    pos = decodedPos.offset
-  } else if (!type._deleted) {
-    let n = type._first
-    let i = 0
-    while (i < type.length && i < decodedPos.offset && n !== null) {
-      i++
-      pos += mapping.get(n).nodeSize
-      n = n._next
-    }
-    pos += 1 // increase because we go out of n
-  }
-  while (type !== yDoc) {
-    const parent = type._parent
-    if (!parent._deleted) {
-      pos += 1 // the start tag
-      let n = parent._first
-      // now iterate until we found type
-      while (n !== null) {
-        if (n === type) {
-          break
-        }
-        pos += mapping.get(n).nodeSize
-        n = n._next
-      }
-    }
-    type = parent
-  }
-  return pos - 1 // we don't count the most outer tag, because it is a fragment
-}
-
-/**
- * Binding for prosemirror.
- *
- * @protected
- */
-export class ProsemirrorBinding {
-  /**
-   * @param {YXmlFragment} yXmlFragment The bind source
-   * @param {EditorView} prosemirrorView The target binding
-   */
-  constructor (yXmlFragment, prosemirrorView) {
-    this.type = yXmlFragment
-    this.prosemirrorView = prosemirrorView
-    this.mux = createMutex()
-    /**
-     * @type {ProsemirrorMapping}
-     */
-    this.mapping = new Map()
-    this._observeFunction = this._typeChanged.bind(this)
-    this.y = yXmlFragment._y
-    /**
-     * current selection as relative positions in the Yjs model
-     */
-    this._relSelection = null
-    this.y.on('beforeTransaction', e => {
-      this._relSelection = {
-        anchor: absolutePositionToRelativePosition(this.prosemirrorView.state.selection.anchor, yXmlFragment, this.mapping),
-        head: absolutePositionToRelativePosition(this.prosemirrorView.state.selection.head, yXmlFragment, this.mapping)
-      }
-    })
-    yXmlFragment.observeDeep(this._observeFunction)
-  }
-  _forceRerender () {
-    this.mapping = new Map()
-    this.mux(() => {
-      const fragmentContent = this.type.toArray().map(t => createNodeFromYElement(t, this.prosemirrorView.state.schema, this.mapping)).filter(n => n !== null)
-      const tr = this.prosemirrorView.state.tr.replace(0, this.prosemirrorView.state.doc.content.size, new PModel.Slice(new PModel.Fragment(fragmentContent), 0, 0))
-      this.prosemirrorView.dispatch(tr)
-    })
-  }
-  /**
-   *
-   * @param {*} snapshot
-   * @param {*} prevSnapshot
-   */
-  _renderSnapshot (snapshot, prevSnapshot) {
-    // clear mapping because we are going to rerender
-    this.mapping = new Map()
-    this.mux(() => {
-      const fragmentContent = this.type.toArray({ sm: snapshot.sm, ds: prevSnapshot.ds}).map(t => createNodeFromYElement(t, this.prosemirrorView.state.schema, new Map(), snapshot, prevSnapshot)).filter(n => n !== null)
-      const tr = this.prosemirrorView.state.tr.replace(0, this.prosemirrorView.state.doc.content.size, new PModel.Slice(new PModel.Fragment(fragmentContent), 0, 0))
-      this.prosemirrorView.dispatch(tr)
-    })
-  }
-  _typeChanged (events, transaction) {
-    if (events.length === 0 || prosemirrorPluginKey.getState(this.prosemirrorView.state).snapshot != null) {
-      // drop out if snapshot is active
-      return
-    }
-    console.info('new types:', transaction.newTypes.size, 'deleted types:', transaction.deletedStructs.size, transaction.newTypes, transaction.deletedStructs)
-    this.mux(() => {
-      const delStruct = (_, struct) => this.mapping.delete(struct)
-      transaction.deletedStructs.forEach(struct => this.mapping.delete(struct))
-      transaction.changedTypes.forEach(delStruct)
-      transaction.changedParentTypes.forEach(delStruct)
-      const fragmentContent = this.type.toArray().map(t => createNodeIfNotExists(t, this.prosemirrorView.state.schema, this.mapping)).filter(n => n !== null)
-      const tr = this.prosemirrorView.state.tr.replace(0, this.prosemirrorView.state.doc.content.size, new PModel.Slice(new PModel.Fragment(fragmentContent), 0, 0))
-      const relSel = this._relSelection
-      if (relSel !== null && relSel.anchor !== null && relSel.head !== null) {
-        const anchor = relativePositionToAbsolutePosition(this.type, relSel.anchor, this.mapping)
-        const head = relativePositionToAbsolutePosition(this.type, relSel.head, this.mapping)
-        if (anchor !== null && head !== null) {
-          tr.setSelection(TextSelection.create(tr.doc, anchor, head))
-        }
-      }
-      this.prosemirrorView.dispatch(tr)
-    })
-  }
-  _prosemirrorChanged (doc) {
-    this.mux(() => {
-      updateYFragment(this.type, doc.content, this.mapping)
-    })
-  }
-  destroy () {
-    this.type.unobserveDeep(this._observeFunction)
-  }
-}
-
-/**
- * @private
- * @param {YXmlElement} el
- * @param {PModel.Schema} schema
- * @param {ProsemirrorMapping} mapping
- * @param {HistorySnapshot} [snapshot]
- * @param {HistorySnapshot} [prevSnapshot]
- * @return {PModel.Node}
- */
-export const createNodeIfNotExists = (el, schema, mapping, snapshot, prevSnapshot) => {
-  const node = mapping.get(el)
-  if (node === undefined) {
-    return createNodeFromYElement(el, schema, mapping, snapshot, prevSnapshot)
-  }
-  return node
-}
-
-/**
- * @private
- * @param {YXmlElement} el
- * @param {PModel.Schema} schema
- * @param {ProsemirrorMapping} mapping
- * @param {import('../protocols/history.js').HistorySnapshot} [snapshot]
- * @param {import('../protocols/history.js').HistorySnapshot} [prevSnapshot]
- * @return {PModel.Node | null} Returns node if node could be created. Otherwise it deletes the yjs type and returns null
- */
-export const createNodeFromYElement = (el, schema, mapping, snapshot, prevSnapshot) => {
-  let _snapshot = snapshot
-  let _prevSnapshot = prevSnapshot
-  if (snapshot !== undefined && prevSnapshot !== undefined) {
-    if (!isVisible(el, snapshot)) {
-      // if this element is already rendered as deleted (ychange), then do not render children as deleted
-      _snapshot = {sm: snapshot.sm, ds: prevSnapshot.ds}
-      _prevSnapshot = _snapshot
-    } else if (!isVisible(el, prevSnapshot)) {
-      _prevSnapshot = _snapshot
-    }
-  }
-  const children = []
-  const createChildren = type => {
-    if (type.constructor === YXmlElement) {
-      const n = createNodeIfNotExists(type, schema, mapping, _snapshot, _prevSnapshot)
-      if (n !== null) {
-        children.push(n)
-      }
-    } else {
-      const ns = createTextNodesFromYText(type, schema, mapping, _snapshot, _prevSnapshot)
-      if (ns !== null) {
-        ns.forEach(textchild => {
-          if (textchild !== null) {
-            children.push(textchild)
-          }
-        })
-      }
-    }
-  }
-  if (snapshot === undefined || prevSnapshot === undefined) {
-    el.toArray().forEach(createChildren)
-  } else {
-    el.toArray({sm: snapshot.sm, ds: prevSnapshot.ds}).forEach(createChildren)
-  }
-  let node
-  try {
-    const attrs = el.getAttributes(_snapshot)
-    if (snapshot !== undefined) {
-      if (!isVisible(el, snapshot)) {
-        attrs.ychange = { user: el._id.user, state: 'removed' }
-      } else if (!isVisible(el, prevSnapshot)) {
-        attrs.ychange = { user: el._id.user, state: 'added' }
-      }
-    }
-    node = schema.node(el.nodeName.toLowerCase(), attrs, children)
-  } catch (e) {
-    // an error occured while creating the node. This is probably a result because of a concurrent action.
-    // ignore the node while rendering
-    /* do not delete anymore
-    el._y.transact(() => {
-      el._delete(el._y, true)
-    })
-    */
-    return null
-  }
-  mapping.set(el, node)
-  return node
-}
-
-/**
- * @private
- * @param {YText} text
- * @param {PModel.Schema} schema
- * @param {ProsemirrorMapping} mapping
- * @param {HistorySnapshot} [snapshot]
- * @param {HistorySnapshot} [prevSnapshot]
- * @return {Array<PModel.Node>}
- */
-export const createTextNodesFromYText = (text, schema, mapping, snapshot, prevSnapshot) => {
-  const nodes = []
-  const deltas = text.toDelta(snapshot, prevSnapshot)
-  try {
-    for (let i = 0; i < deltas.length; i++) {
-      const delta = deltas[i]
-      const marks = []
-      for (let markName in delta.attributes) {
-        marks.push(schema.mark(markName, delta.attributes[markName]))
-      }
-      nodes.push(schema.text(delta.insert, marks))
-    }
-    if (nodes.length > 0) {
-      mapping.set(text, nodes[0]) // only map to first child, all following children are also considered bound to this type
-    }
-  } catch (e) {
-    /*
-    text._y.transact(() => {
-      text._delete(text._y, true)
-    })
-    */
-    return null
-  }
-  return nodes
-}
-
-/**
- * @private
- * @param {PModel.Node} node
- * @param {ProsemirrorMapping} mapping
- * @return {YXmlElement | YText}
- */
-export const createTypeFromNode = (node, mapping) => {
-  let type
-  if (node.isText) {
-    type = new YText()
-    const attrs = {}
-    node.marks.forEach(mark => {
-      if (mark.type.name !== 'ychange') {
-        attrs[mark.type.name] = mark.attrs
-      }
-    })
-    type.insert(0, node.text, attrs)
-  } else {
-    type = new YXmlElement(node.type.name)
-    for (let key in node.attrs) {
-      const val = node.attrs[key]
-      if (val !== null && key !== 'ychange') {
-        type.setAttribute(key, val)
-      }
-    }
-    const ins = []
-    for (let i = 0; i < node.childCount; i++) {
-      ins.push(createTypeFromNode(node.child(i), mapping))
-    }
-    type.insert(0, ins)
-  }
-  mapping.set(type, node)
-  return type
-}
-
-const equalAttrs = (pattrs, yattrs) => {
-  const keys = Object.keys(pattrs).filter(key => pattrs[key] === null)
-  let eq = keys.length === Object.keys(yattrs).filter(key => yattrs[key] === null).length
-  for (let i = 0; i < keys.length && eq; i++) {
-    const key = keys[i]
-    const l = pattrs[key]
-    const r = yattrs[key]
-    eq = key === 'ychange' || l === r || (typeof l === 'object' && typeof r === 'object' && equalAttrs(l, r))
-  }
-  return eq
-}
-
-const equalYTextPText = (ytext, ptext) => {
-  const d = ytext.toDelta()[0]
-  return d.insert === ptext.text && object.keys(d.attributes || {}).length === ptext.marks.length && ptext.marks.every(mark => equalAttrs(d.attributes[mark.type.name], mark.attrs))
-}
-
-const equalYTypePNode = (ytype, pnode) =>
-  ytype.constructor === YText
-    ? equalYTextPText(ytype, pnode)
-    : (matchNodeName(ytype, pnode) && ytype.length === pnode.childCount && equalAttrs(ytype.getAttributes(), pnode.attrs) && ytype.toArray().every((ychild, i) => equalYTypePNode(ychild, pnode.child(i))))
-
-const computeChildEqualityFactor = (ytype, pnode, mapping) => {
-  const yChildren = ytype.toArray()
-  const pChildCnt = pnode.childCount
-  const yChildCnt = yChildren.length
-  const minCnt = math.min(yChildCnt, pChildCnt)
-  let left = 0
-  let right = 0
-  let foundMappedChild = false
-  for (; left < minCnt; left++) {
-    const leftY = yChildren[left]
-    const leftP = pnode.child(left)
-    if (mapping.get(leftY) === leftP) {
-      foundMappedChild = true// definite (good) match!
-    } else if (!equalYTypePNode(leftY, leftP)) {
-      break
-    }
-  }
-  for (; left + right < minCnt; right++) {
-    const rightY = yChildren[yChildCnt - right - 1]
-    const rightP = pnode.child(pChildCnt - right - 1)
-    if (mapping.get(rightY) !== rightP) {
-      foundMappedChild = true
-    } else if (!equalYTypePNode(rightP, rightP)) {
-      break
-    }
-  }
-  return {
-    equalityFactor: left + right,
-    foundMappedChild
-  }
-}
-
-/**
- * @private
- * @param {YXmlFragment} yDomFragment
- * @param {PModel.Node} pContent
- * @param {ProsemirrorMapping} mapping
- */
-const updateYFragment = (yDomFragment, pContent, mapping) => {
-  if (yDomFragment instanceof YXmlElement && yDomFragment.nodeName.toLowerCase() !== pContent.type.name) {
-    throw new Error('node name mismatch!')
-  }
-  mapping.set(yDomFragment, pContent)
-  // update attributes
-  if (yDomFragment instanceof YXmlElement) {
-    const yDomAttrs = yDomFragment.getAttributes()
-    const pAttrs = pContent.attrs
-    for (let key in pAttrs) {
-      if (pAttrs[key] !== null) {
-        if (yDomAttrs[key] !== pAttrs[key] && key !== 'ychange') {
-          yDomFragment.setAttribute(key, pAttrs[key])
-        }
-      } else {
-        yDomFragment.removeAttribute(key)
-      }
-    }
-    // remove all keys that are no longer in pAttrs
-    for (let key in yDomAttrs) {
-      if (pAttrs[key] === undefined) {
-        yDomFragment.removeAttribute(key)
-      }
-    }
-  }
-  // update children
-  const pChildCnt = pContent.childCount
-  const yChildren = yDomFragment.toArray()
-  const yChildCnt = yChildren.length
-  const minCnt = math.min(pChildCnt, yChildCnt)
-  let left = 0
-  let right = 0
-  // find number of matching elements from left
-  for (;left < minCnt; left++) {
-    const leftY = yChildren[left]
-    const leftP = pContent.child(left)
-    if (mapping.get(leftY) !== leftP) {
-      if (equalYTypePNode(leftY, leftP)) {
-        // update mapping
-        mapping.set(leftY, leftP)
-      } else {
-        break
-      }
-    }
-  }
-  // find number of matching elements from right
-  for (;right + left < minCnt; right++) {
-    const rightY = yChildren[yChildCnt - right - 1]
-    const rightP = pContent.child(pChildCnt - right - 1)
-    if (mapping.get(rightY) !== rightP) {
-      if (equalYTypePNode(rightY, rightP)) {
-        // update mapping
-        mapping.set(rightY, rightP)
-      } else {
-        break
-      }
-    }
-  }
-  yDomFragment._y.transact(() => {
-    // try to compare and update
-    while (yChildCnt - left - right > 0 && pChildCnt - left - right > 0) {
-      const leftY = yChildren[left]
-      const leftP = pContent.child(left)
-      const rightY = yChildren[yChildCnt - right - 1]
-      const rightP = pContent.child(pChildCnt - right - 1)
-      if (leftY.constructor === YText && leftP.isText) {
-        if (!equalYTextPText(leftY, leftP)) {
-          // try to apply diff. Only if attrs don't match, delete insert
-          // TODO: use a single ytext to hold all following Prosemirror Text nodes
-          const pattrs = {}
-          leftP.marks.forEach(mark => {
-            if (mark.type.name !== 'ychange') {
-              pattrs[mark.type.name] = mark.attrs
-            }
-          })
-          const delta = leftY.toDelta()
-          if (delta.length === 1 && delta[0].insert && equalAttrs(pattrs, delta[0].attributes || {})) {
-            const diff = simpleDiff(delta[0].insert, leftP.text)
-            leftY.delete(diff.pos, diff.remove)
-            leftY.insert(diff.pos, diff.insert)
-          } else {
-            yDomFragment.delete(left, 1)
-            yDomFragment.insert(left, [createTypeFromNode(leftP, mapping)])
-          }
-        }
-        left += 1
-      } else {
-        let updateLeft = matchNodeName(leftY, leftP)
-        let updateRight = matchNodeName(rightY, rightP)
-        if (updateLeft && updateRight) {
-          // decide which which element to update
-          const equalityLeft = computeChildEqualityFactor(leftY, leftP, mapping)
-          const equalityRight = computeChildEqualityFactor(rightY, rightP, mapping)
-          if (equalityLeft.foundMappedChild && !equalityRight.foundMappedChild) {
-            updateRight = false
-          } else if (!equalityLeft.foundMappedChild && equalityRight.foundMappedChild) {
-            updateLeft = false
-          } else if (equalityLeft.equalityFactor < equalityRight.equalityFactor) {
-            updateLeft = false
-          } else {
-            updateRight = false
-          }
-        }
-        if (updateLeft) {
-          updateYFragment(leftY, leftP, mapping)
-          left += 1
-        } else if (updateRight) {
-          updateYFragment(rightY, rightP, mapping)
-          right += 1
-        } else {
-          yDomFragment.delete(left, 1)
-          yDomFragment.insert(left, [createTypeFromNode(leftP, mapping)])
-          left += 1
-        }
-      }
-    }
-    const yDelLen = yChildCnt - left - right
-    if (yDelLen > 0) {
-      yDomFragment.delete(left, yDelLen)
-    }
-    if (left + right < pChildCnt) {
-      const ins = []
-      for (let i = left; i < pChildCnt - right; i++) {
-        ins.push(createTypeFromNode(pContent.child(i), mapping))
-      }
-      yDomFragment.insert(left, ins)
-    }
-  })
-}
-
-/**
- * @function
- * @param {YXmlElement} yElement
- * @param {any} pNode Prosemirror Node
- */
-const matchNodeName = (yElement, pNode) => yElement.nodeName === pNode.type.name.toUpperCase()

bindings/quill.js

@@ -1,71 +0,0 @@
-/**
- * @module bindings/quill
- */
-
-import { createMutex } from '../lib/mutex.js'
-
-const typeObserver = function (event) {
-  const quill = this.target
-  // Force flush Quill changes.
-  quill.update('yjs')
-  this._mutualExclude(() => {
-    // Apply computed delta.
-    quill.updateContents(event.delta, 'yjs')
-    // Force flush Quill changes. Ignore applied changes.
-    quill.update('yjs')
-  })
-}
-
-const quillObserver = function (delta) {
-  this._mutualExclude(() => {
-    this.type.applyDelta(delta.ops)
-  })
-}
-
-/**
- * A Binding that binds a YText type to a Quill editor.
- *
- * @example
- * const quill = new Quill(document.createElement('div'))
- * const type = y.define('quill', Y.Text)
- * const binding = new Y.QuillBinding(quill, type)
- * // Now modifications on the DOM will be reflected in the Type, and the other
- * // way around!
- */
-export class QuillBinding {
-  /**
-   * @param {YText} textType
-   * @param {Quill} quill
-   */
-  constructor (textType, quill) {
-    // Binding handles textType as this.type and quill as this.target.
-    /**
-     * The Yjs type that is bound to `target`
-     * @type {YText}
-     */
-    this.type = textType
-    /**
-     * The target that `type` is bound to.
-     * @type {Quill}
-     */
-    this.target = quill
-    /**
-     * @private
-     */
-    this._mutualExclude = createMutex()
-    // Set initial value.
-    quill.setContents(textType.toDelta(), 'yjs')
-    // Observers are handled by this class.
-    this._typeObserver = typeObserver.bind(this)
-    this._quillObserver = quillObserver.bind(this)
-    textType.observe(this._typeObserver)
-    quill.on('text-change', this._quillObserver)
-  }
-  destroy () {
-    // Remove everything that is handled by this class.
-    this.type.unobserve(this._typeObserver)
-    this.target.off('text-change', this._quillObserver)
-    this.type = null
-    this.target = null
-  }
-}

bindings/textarea.js

@@ -1,72 +0,0 @@
-/**
- * @module bindings/textarea
- */
-
-import { simpleDiff } from '../lib/diff.js'
-import { getRelativePosition, fromRelativePosition } from '../utils/relativePosition.js'
-import { createMutex } from '../lib/mutex.js'
-
-function typeObserver () {
-  this._mutualExclude(() => {
-    const textarea = this.target
-    const textType = this.type
-    const relativeStart = getRelativePosition(textType, textarea.selectionStart)
-    const relativeEnd = getRelativePosition(textType, textarea.selectionEnd)
-    textarea.value = textType.toString()
-    const start = fromRelativePosition(textType._y, relativeStart)
-    const end = fromRelativePosition(textType._y, relativeEnd)
-    textarea.setSelectionRange(start, end)
-  })
-}
-
-function domObserver () {
-  this._mutualExclude(() => {
-    let diff = simpleDiff(this.type.toString(), this.target.value)
-    this.type.delete(diff.pos, diff.remove)
-    this.type.insert(diff.pos, diff.insert)
-  })
-}
-
-/**
- * A binding that binds a YText to a dom textarea.
- *
- * This binding is automatically destroyed when its parent is deleted.
- *
- * @example
- *   const textare = document.createElement('textarea')
- *   const type = y.define('textarea', Y.Text)
- *   const binding = new Y.QuillBinding(type, textarea)
- *
- */
-export class TextareaBinding {
-  constructor (textType, domTextarea) {
-    /**
-     * The Yjs type that is bound to `target`
-     * @type {Type}
-     */
-    this.type = textType
-    /**
-     * The target that `type` is bound to.
-     * @type {*}
-     */
-    this.target = domTextarea
-    /**
-     * @private
-     */
-    this._mutualExclude = createMutex()
-    // set initial value
-    domTextarea.value = textType.toString()
-    // Observers are handled by this class
-    this._typeObserver = typeObserver.bind(this)
-    this._domObserver = domObserver.bind(this)
-    textType.observe(this._typeObserver)
-    domTextarea.addEventListener('input', this._domObserver)
-  }
-  destroy () {
-    // Remove everything that is handled by this class
-    this.type.unobserve(this._typeObserver)
-    this.target.unobserve(this._domObserver)
-    this.type = null
-    this.target = null
-  }
-}

examples/.gitignore

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

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">
-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

@@ -1,23 +0,0 @@
-import * as Y from '../index.js'
-import { WebsocketProvider } from '../provider/websocket.js'
-import { CodeMirrorBinding } from '../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
-}

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">
-    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 '../index.js'
-import { WebsocketProvider } from '../provider/websocket.js'
-import { DomBinding } from '../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
-}

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 '../index.js'
-import { prosemirrorPluginKey } from '../bindings/prosemirror.js'
-import * as encoding from '../lib/encoding.js'
-import * as decoding from '../lib/decoding.js'
-import * as historyProtocol from '../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.html

@@ -1,117 +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;
-      }
-    </style>
-</head>
-<body>
-  <p>This example shows how to bind a YXmlFragment type to a <a href="http://prosemirror.net">Prosemirror</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="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">
-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

@@ -1,25 +0,0 @@
-import * as Y from '../index.js'
-import { WebsocketProvider } from '../provider/websocket.js'
-import { prosemirrorPlugin, cursorPlugin } from '../bindings/prosemirror.js'
-
-import * as conf from './exampleConfig.js'
-
-import { EditorState } from 'prosemirror-state'
-import { EditorView } from 'prosemirror-view'
-import { DOMParser, Schema } 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.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 /* noteHistoryPlugin */])
-  })
-})
-
-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">
-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 '../index.js'
-import { WebsocketProvider } from '../provider/websocket.js'
-import { QuillBinding } from '../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)

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">
-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

@@ -1,15 +0,0 @@
-import * as Y from '../index.js'
-import { WebsocketProvider } from '../provider/websocket.js'
-import { TextareaBinding } from '../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
-}

examples_all/ace/index.html

@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <style type="text/css" media="screen">
-    #aceContainer {
-        position: absolute;
-        top: 0;
-        right: 0;
-        bottom: 0;
-        left: 0;
-    }
-    .inserted {
-      position:absolute;
-      z-index:20;
-      background-color: #FFC107;
-    }
-    .deleted {
-      position:absolute;
-      z-index:20;
-      background-color: #FFC107;
-    }
-    </style>
-  </head>
-  <body>
-
-    <div id="aceContainer"></div>
-    <script src="../../y.js"></script>
-    <script src='../../../y-websockets-client/y-websockets-client.js'></script>
-    <script src="../bower_components/ace-builds/src/ace.js"></script>
-
-    <script src="./index.js"></script>
-  </body>
-</html>

examples_all/ace/index.js

@@ -1,17 +0,0 @@
-/* global Y, ace */
-
-let y = new Y('ace-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-window.yAce = y
-
-// bind the textarea to a shared text element
-var editor = ace.edit('aceContainer')
-editor.setTheme('ace/theme/chrome')
-editor.getSession().setMode('ace/mode/javascript')
-
-y.define('ace', Y.Text).bindAce(editor)

examples_all/chat/index.html

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

examples_all/chat/index.js

@@ -1,65 +0,0 @@
-/* global Y */
-
-let y = new Y('chat-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-window.yChat = y
-
-let chatprotocol = y.define('chatprotocol', Y.Array)
-
-let chatcontainer = document.querySelector('#chat')
-
-// This functions inserts a message at the specified position in the DOM
-const appendMessage = (message, position) => {
-  var p = document.createElement('p')
-  var uname = document.createElement('span')
-  uname.appendChild(document.createTextNode(message.username + ': '))
-  p.appendChild(uname)
-  p.appendChild(document.createTextNode(message.message))
-  chatcontainer.insertBefore(p, chatcontainer.children[position] || null)
-}
-
-// This function makes sure that only 7 messages exist in the chat history.
-// The rest is deleted
-const cleanupChat = () => {
-  if (chatprotocol.length > 7) {
-    chatprotocol.delete(0, chatprotocol.length - 7)
-  }
-}
-cleanupChat()
-
-// Insert the initial content
-chatprotocol.toArray().forEach(appendMessage)
-
-// whenever content changes, make sure to reflect the changes in the DOM
-chatprotocol.observe(event => {
-  // concurrent insertions may result in a history > 7, so cleanup here
-  cleanupChat()
-  chatcontainer.innerHTML = ''
-  chatprotocol.toArray().forEach(appendMessage)
-})
-document.querySelector('#chatform').onsubmit = function (event) {
-  // the form is submitted
-  var message = {
-    username: this.querySelector('[name=username]').value,
-    message: this.querySelector('[name=message]').value
-  }
-  if (message.username.length > 0 && message.message.length > 0) {
-    if (chatprotocol.length > 6) {
-      // If we are goint to insert the 8th element, make sure to delete first.
-      chatprotocol.delete(0)
-    }
-    // Here we insert a message in the shared chat type.
-    // This will call the observe function (see line 40)
-    // and reflect the change in the DOM
-    chatprotocol.push([message])
-    this.querySelector('[name=message]').value = ''
-  }
-  // Do not send this form!
-  event.preventDefault()
-  return false
-}

examples_all/codemirror/index.html

@@ -1,24 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-  </head>
-  <body>
-    <div id="codeMirrorContainer"></div>
-
-    <script src="../../y.js"></script>
-    <script src='../../../y-websockets-client/y-websockets-client.js'></script>
-    <script src="../bower_components/codemirror/lib/codemirror.js"></script>
-    <script src="../bower_components/codemirror/mode/javascript/javascript.js"></script>
-    <link rel="stylesheet" href="../bower_components/codemirror/lib/codemirror.css">
-    <style>
-      .CodeMirror {
-        position: fixed;
-        top: 0;
-        left: 0;
-        height: 100%;
-        width: 100%;
-      }
-    </style>
-    <script src="./index.js"></script>
-  </body>
-</html>

examples_all/codemirror/index.js

@@ -1,16 +0,0 @@
-/* global Y, CodeMirror */
-
-let y = new Y('codemirror-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-window.yCodeMirror = y
-
-var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
-  mode: 'javascript',
-  lineNumbers: true
-})
-y.define('codemirror', Y.Text).bindCodeMirror(editor)

examples_all/drawing/index.html

@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<html>
-<body>
-  <style>
-    path {
-      fill: none;
-      stroke: blue;
-      stroke-width: 1px;
-      stroke-linejoin: round;
-      stroke-linecap: round;
-    }
-  </style>
-  <button type="button" id="clearDrawingCanvas">Clear Drawing</button>
-  <svg id="drawingCanvas" viewbox="0 0 100 100" width="100%"></svg>
-  <script src="../../y.js"></script>
-  <script src='../../../y-websockets-client/y-websockets-client.js'></script>
-  <script src="../bower_components/d3/d3.min.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples_all/drawing/index.js

@@ -1,74 +0,0 @@
-/* globals Y, d3 */
-
-let y = new Y('drawing-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-window.yDrawing = y
-var drawing = y.define('drawing', Y.Array)
-var renderPath = d3.svg.line()
-  .x(function (d) { return d[0] })
-  .y(function (d) { return d[1] })
-  .interpolate('basic')
-
-var svg = d3.select('#drawingCanvas')
-  .call(d3.behavior.drag()
-    .on('dragstart', dragstart)
-    .on('drag', drag)
-    .on('dragend', dragend))
-
-// create line from a shared array object and update the line when the array changes
-function drawLine (yarray) {
-  var line = svg.append('path').datum(yarray.toArray())
-  line.attr('d', renderPath)
-  yarray.observe(function (event) {
-    line.remove()
-    line = svg.append('path').datum(yarray.toArray())
-    line.attr('d', renderPath)
-  })
-}
-// call drawLine every time an array is appended
-drawing.observe(function (event) {
-  event.removedElements.forEach(function () {
-    // if one is deleted, all will be deleted!!
-    svg.selectAll('path').remove()
-  })
-  event.addedElements.forEach(function (path) {
-    drawLine(path)
-  })
-})
-// draw all existing content
-for (var i = 0; i < drawing.length; i++) {
-  drawLine(drawing.get(i))
-}
-
-// clear canvas on request
-document.querySelector('#clearDrawingCanvas').onclick = function () {
-  drawing.delete(0, drawing.length)
-}
-
-var sharedLine = null
-function dragstart () {
-  drawing.insert(drawing.length, [Y.Array])
-  sharedLine = drawing.get(drawing.length - 1)
-}
-
-// After one dragged event is recognized, we ignore them for 33ms.
-var ignoreDrag = null
-function drag () {
-  if (sharedLine != null && ignoreDrag == null) {
-    ignoreDrag = window.setTimeout(function () {
-      ignoreDrag = null
-    }, 10)
-    sharedLine.push([d3.mouse(this)])
-  }
-}
-
-function dragend () {
-  sharedLine = null
-  window.clearTimeout(ignoreDrag)
-  ignoreDrag = null
-}

examples_all/html-editor-drawing-hook/index.html

@@ -1,36 +0,0 @@
-<!DOCTYPE html>
-<html>
-</head>
-  <script src="../../y.js"></script>
-  <script src='../../../y-websockets-client/y-websockets-client.js'></script>
-  <script src="../bower_components/d3/d3.min.js"></script>
-  <script src="./index.js"></script>
-  <style>
-    magic-drawing .drawingCanvas path {
-      fill: none;
-      stroke: blue;
-      stroke-width: 2px;
-      stroke-linejoin: round;
-      stroke-linecap: round;
-    }
-    magic-drawing .drawingCanvas {
-      width: 500px;
-      height: 500px;
-      cursor: default;
-      padding:1px;
-      border:1px solid #021a40;
-    }
-    magic-drawing .clearDrawingButton {
-      position: absolute;
-      top: 0;
-      left: 0;
-    }
-    magic-drawing {
-      position: relative;
-      display: block;
-    }
-  </style>
-</head>
-<body contenteditable="true">
-</body>
-</html>

examples_all/html-editor-drawing-hook/index.js

@@ -1,134 +0,0 @@
-/* global Y, d3 */
-
-const hooks = {
-  'magic-drawing': {
-    fillType: function (dom, type) {
-      initDrawingBindings(type, dom)
-    },
-    createDom: function (type) {
-      const dom = document.createElement('magic-drawing')
-      initDrawingBindings(type, dom)
-      return dom
-    }
-  }
-}
-
-window.onload = function () {
-  window.domBinding = new Y.DomBinding(window.yXmlType, document.body, { hooks })
-}
-
-window.addMagicDrawing = function addMagicDrawing () {
-  let mt = document.createElement('magic-drawing')
-  mt.setAttribute('data-yjs-hook', 'magic-drawing')
-  document.body.append(mt)
-}
-
-var renderPath = d3.svg.line()
-  .x(function (d) { return d[0] })
-  .y(function (d) { return d[1] })
-  .interpolate('basic')
-
-function initDrawingBindings (type, dom) {
-  dom.contentEditable = 'false'
-  dom.setAttribute('data-yjs-hook', 'magic-drawing')
-  var drawing = type.get('drawing')
-  if (drawing === undefined) {
-    drawing = type.set('drawing', new Y.Array())
-  }
-  var canvas = dom.querySelector('.drawingCanvas')
-  if (canvas == null) {
-    canvas = document.createElementNS('http://www.w3.org/2000/svg', 'svg')
-    canvas.setAttribute('class', 'drawingCanvas')
-    canvas.setAttribute('viewbox', '0 0 100 100')
-    dom.insertBefore(canvas, null)
-  }
-  var clearDrawingButton = dom.querySelector('.clearDrawingButton')
-  if (clearDrawingButton == null) {
-    clearDrawingButton = document.createElement('button')
-    clearDrawingButton.setAttribute('type', 'button')
-    clearDrawingButton.setAttribute('class', 'clearDrawingButton')
-    clearDrawingButton.innerText = 'Clear Drawing'
-    dom.insertBefore(clearDrawingButton, null)
-  }
-  var svg = d3.select(canvas)
-    .call(d3.behavior.drag()
-      .on('dragstart', dragstart)
-      .on('drag', drag)
-      .on('dragend', dragend))
-  // create line from a shared array object and update the line when the array changes
-  function drawLine (yarray, svg) {
-    var line = svg.append('path').datum(yarray.toArray())
-    line.attr('d', renderPath)
-    yarray.observe(function (event) {
-      line.remove()
-      line = svg.append('path').datum(yarray.toArray())
-      line.attr('d', renderPath)
-    })
-  }
-  // call drawLine every time an array is appended
-  drawing.observe(function (event) {
-    event.removedElements.forEach(function () {
-      // if one is deleted, all will be deleted!!
-      svg.selectAll('path').remove()
-    })
-    event.addedElements.forEach(function (path) {
-      drawLine(path, svg)
-    })
-  })
-  // draw all existing content
-  for (var i = 0; i < drawing.length; i++) {
-    drawLine(drawing.get(i), svg)
-  }
-
-  // clear canvas on request
-  clearDrawingButton.onclick = function () {
-    drawing.delete(0, drawing.length)
-  }
-
-  var sharedLine = null
-  function dragstart () {
-    drawing.insert(drawing.length, [Y.Array])
-    sharedLine = drawing.get(drawing.length - 1)
-  }
-
-  // After one dragged event is recognized, we ignore them for 33ms.
-  var ignoreDrag = null
-  function drag () {
-    if (sharedLine != null && ignoreDrag == null) {
-      ignoreDrag = window.setTimeout(function () {
-        ignoreDrag = null
-      }, 10)
-      sharedLine.push([d3.mouse(this)])
-    }
-  }
-
-  function dragend () {
-    sharedLine = null
-    window.clearTimeout(ignoreDrag)
-    ignoreDrag = null
-  }
-}
-
-let y = new Y('html-editor-drawing-hook-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-window.yXml = y
-window.yXmlType = y.define('xml', Y.XmlFragment)
-window.undoManager = new Y.utils.UndoManager(window.yXmlType, {
-  captureTimeout: 500
-})
-
-document.onkeydown = function interceptUndoRedo (e) {
-  if (e.keyCode === 90 && e.metaKey) {
-    if (!e.shiftKey) {
-      window.undoManager.undo()
-    } else {
-      window.undoManager.redo()
-    }
-    e.preventDefault()
-  }
-}

examples_all/html-editor/index.html

@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html>
-</head>
-  <script src="./index.js" type="module"></script>
-</head>
-<body>
-    <label for="room">Room: </label>
-    <input type="text" id="room" name="room">
-    <div id="content" contenteditable style="position:absolute;top:35px;left:0;right:0;bottom:0;outline: 0px solid transparent;"></div>
-</body>
-</html>

examples_all/html-editor/index.js

@@ -1,77 +0,0 @@
-
-import YWebsocketsConnector from '../../src/Connectors/WebsocketsConnector/WebsocketsConnector.js'
-import Y from '../../src/Y.js'
-import DomBinding from '../../bindings/DomBinding/DomBinding.js'
-import UndoManager from '../../src/Util/UndoManager.js'
-import YXmlFragment from '../../src/Types/YXml/YXmlFragment.js'
-import YXmlText from '../../src/Types/YXml/YXmlText.js'
-import YXmlElement from '../../src/Types/YXml/YXmlElement.js'
-import YIndexdDBPersistence from '../../src/Persistences/IndexedDBPersistence.js'
-
-const connector = new YWebsocketsConnector()
-const persistence = new YIndexdDBPersistence()
-
-const roomInput = document.querySelector('#room')
-
-let currentRoomName = null
-let y = null
-let domBinding = null
-
-function setRoomName (roomName) {
-  if (currentRoomName !== roomName) {
-    console.log(`change room: "${roomName}"`)
-    roomInput.value = roomName
-    currentRoomName = roomName
-    location.hash = '#' + roomName
-    if (y !== null) {
-      domBinding.destroy()
-    }
-
-    const room = connector._rooms.get(roomName)
-    if (room !== undefined) {
-      y = room.y
-    } else {
-      y = new Y(roomName, null, null, { gc: true })
-      persistence.connectY(roomName, y).then(() => {
-        // connect after persisted content was applied to y
-        // If we don't wait for persistence, the other peer will send all data, waisting
-        // network bandwidth..
-        connector.connectY(roomName, y)
-      })
-      window.y = y
-    }
-
-    window.y = y
-    window.yXmlType = y.define('xml', YXmlFragment)
-
-    domBinding = new DomBinding(window.yXmlType, document.querySelector('#content'), { scrollingElement: document.scrollingElement })
-  }
-}
-window.setRoomName = setRoomName
-
-window.createRooms = function (i = 0) {
-  setInterval(function () {
-    setRoomName(i + '')
-    i++
-    const nodes = []
-    for (let j = 0; j < 100; j++) {
-      const node = new YXmlElement('p')
-      node.insert(0, [new YXmlText(`This is the ${i}th paragraph of room ${i}`)])
-      nodes.push(node)
-    }
-    y.share.xml.insert(0, nodes)
-  }, 100)
-}
-
-connector.syncPersistence(persistence)
-
-window.connector = connector
-window.persistence = persistence
-
-window.onload = function () {
-  setRoomName((location.hash || '#default').slice(1))
-  roomInput.addEventListener('input', e => {
-    const roomName = e.target.value
-    setRoomName(roomName)
-  })
-}

examples_all/indexeddb/index.html

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

examples_all/indexeddb/index.js

@@ -1,19 +0,0 @@
-/* global Y, CodeMirror */
-
-const persistence = new Y.IndexedDB()
-const connector = {
-  connector: {
-    name: 'websockets-client',
-    room: 'codemirror-example'
-  }
-}
-
-const y = new Y('codemirror-example', connector, persistence)
-window.yCodeMirror = y
-
-var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
-  mode: 'javascript',
-  lineNumbers: true
-})
-
-y.define('codemirror', Y.Text).bindCodeMirror(editor)

examples_all/jigsaw/index.html

@@ -1,24 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <style type="text/css">
-    .draggable {
-      cursor: move;
-    }
-  </style>
-</head>
-<body>
-  <svg id="puzzle-example" width="100%" viewBox="0 0 800 800">
-    <g>
-      <path d="M 311.76636,154.23389 C 312.14136,171.85693 318.14087,184.97998 336.13843,184.23047 C 354.13647,183.48047 351.88647,180.48096 354.88599,178.98096 C 357.8855,177.48096 368.38452,170.35693 380.00806,169.98193 C 424.61841,168.54297 419.78296,223.6001 382.25757,223.6001 C 377.75806,223.6001 363.51001,219.10107 356.38599,211.97656 C 349.26196,204.85254 310.64185,207.10254 314.76636,236.34863 C 316.34888,247.5708 324.08374,267.90723 324.84595,286.23486 C 325.29321,296.99414 323.17603,307.00635 321.58911,315.6377 C 360.11353,305.4585 367.73462,304.30518 404.00513,312.83936 C 410.37915,314.33887 436.62573,310.21436 421.25269,290.3418 C 405.87964,270.46924 406.25464,248.34717 417.12817,240.84814 C 428.00171,233.34912 446.74976,228.84961 457.99829,234.09912 C 469.24683,239.34814 484.61987,255.84619 475.24585,271.59424 C 465.87231,287.34229 452.74878,290.7168 456.49829,303.84033 C 460.2478,316.96387 479.74536,320.33838 500.74292,321.83789 C 509.70142,322.47803 527.97192,323.28467 542.10864,320.12939 C 549.91821,318.38672 556.92212,315.89502 562.46753,313.56396 C 561.40796,277.80664 560.84888,245.71729 560.3606,241.97314 C 558.85278,230.41455 542.49536,217.28564 525.86499,223.2251 C 520.61548,225.1001 519.86548,231.84912 505.24243,232.59912 C 444.92798,235.69238 462.06958,143.26709 525.86499,180.48096 C 539.52759,188.45068 575.19409,190.7583 570.10913,156.85889 C 567.85962,141.86035 553.98608,102.86523 553.98608,102.86523 C 553.98608,102.86523 477.23755,111.82227 451.99878,91.991699 C 441.50024,83.74292 444.87476,69.494629 449.37427,61.245605 C 453.87378,52.996582 465.12231,46.622559 464.74731,36.123779 C 463.02563,-12.086426 392.96704,-10.902832 396.5061,36.873535 C 397.25562,46.997314 406.62964,52.621582 410.75415,60.495605 C 420.00757,78.161377 405.50024,96.073486 384.50757,99.490723 C 377.36206,100.65381 349.17505,102.65332 320.39429,102.23486 C 319.677,102.22461 318.95923,102.21143 318.24194,102.19775 C 315.08423,120.9751 311.55688,144.39697 311.76636,154.23389 z " style="fill:#f2c569;stroke:#000000" id="path2502"/>
-      <path d="M 500.74292,321.83789 C 479.74536,320.33838 460.2478,316.96387 456.49829,303.84033 C 452.74878,290.7168 465.87231,287.34229 475.24585,271.59424 C 484.61987,255.84619 469.24683,239.34814 457.99829,234.09912 C 446.74976,228.84961 428.00171,233.34912 417.12817,240.84814 C 406.25464,248.34717 405.87964,270.46924 421.25269,290.3418 C 436.62573,310.21436 410.37915,314.33887 404.00513,312.83936 C 367.73462,304.30518 360.11353,305.4585 321.58911,315.6377 C 320.56372,321.21484 319.75854,326.2207 320.01538,330.46191 C 320.76538,342.83545 329.3894,385.95508 327.8894,392.7041 C 326.3894,399.45312 313.64136,418.20117 297.89331,407.32715 C 282.14526,396.45361 276.52075,393.4541 265.27222,394.5791 C 254.02368,395.70361 239.77563,402.07812 239.77563,419.32568 C 239.77563,436.57373 250.27417,449.69727 268.64673,447.82227 C 287.36353,445.9126 317.92163,423.11035 325.63989,452.69678 C 330.1394,469.94434 330.51392,487.19238 330.1394,498.44092 C 329.95825,503.87646 326.09985,518.06592 322.16089,531.28125 C 353.2854,532.73682 386.47095,531.26611 394.2561,529.93701 C 430.30933,523.78174 429.31909,496.09766 412.62866,477.44385 C 406.25464,470.31934 401.75513,455.32129 405.87964,444.82275 C 414.07056,423.97314 458.8064,422.17773 473.37134,438.82324 C 483.86987,450.82178 475.99585,477.44385 468.49683,482.69287 C 453.52222,493.17529 457.22485,516.83008 473.37134,528.06201 C 504.79126,549.91943 572.35913,535.56152 572.35913,535.56152 C 572.35913,535.56152 567.85962,498.06592 567.48462,471.81934 C 567.10962,445.57275 589.60669,450.07227 593.3562,450.07227 C 597.10571,450.07227 604.22974,455.32129 609.47925,459.4458 C 614.72876,463.57031 618.85327,469.94434 630.85181,470.69434 C 677.43726,473.60596 674.58813,420.7373 631.97632,413.32666 C 623.35229,411.82666 614.72876,416.32617 603.10522,424.57519 C 591.48169,432.82422 577.23315,425.32519 570.10913,417.45117 C 566.07788,412.99561 563.8479,360.16406 562.46753,313.56396 C 556.92212,315.89502 549.91821,318.38672 542.10864,320.12939 C 527.97192,323.28467 509.70142,322.47803 500.74292,321.83789 z " style="fill:#f3f3d6;stroke:#000000" id="path2504"/>
-      <path d="M 240.52563,141.86035 C 257.60327,159.6499 243.94507,188.68799 214.65356,190.22949 C 185.09448,191.78516 164.66675,157.17822 190.28589,136.61621 C 200.49585,128.42139 198.05786,114.12158 179.78296,106.98975 C 154.4187,97.091553 90.54419,107.73975 90.54419,107.73975 C 90.54419,107.73975 100.88794,135.11328 101.41772,168.48242 C 101.79272,192.104 68.796875,189.47949 63.172607,186.85498 C 57.54834,184.23047 45.924805,173.73145 37.675781,173.73145 C -14.411865,173.73145 -10.013184,245.84375 39.925537,232.22412 C 48.174316,229.97461 56.42334,220.97559 68.796875,222.47559 C 81.17041,223.9751 87.544434,232.59912 87.544434,246.09766 C 87.544434,252.51709 87.0354,281.24268 86.340576,312.87012 C 119.15894,313.67676 160.60962,314.46582 170.03442,313.58887 C 186.15698,312.08936 195.90601,301.59033 188.40698,293.3418 C 180.90796,285.09277 156.16089,256.59619 179.03296,239.34814 C 201.90503,222.10059 235.65112,231.84912 239.77563,247.22217 C 243.90015,262.59521 240.52563,273.46924 234.90112,279.09326 C 229.27661,284.71777 210.52905,298.96582 221.40259,308.71484 C 232.27661,318.46338 263.77222,330.83691 302.39282,320.71338 C 309.58862,318.82715 315.92114,317.13525 321.58911,315.6377 C 323.17603,307.00635 325.29321,296.99414 324.84595,286.23486 C 324.08374,267.90723 316.34888,247.5708 314.76636,236.34863 C 310.64185,207.10254 349.26196,204.85254 356.38599,211.97656 C 363.51001,219.10107 377.75806,223.6001 382.25757,223.6001 C 419.78296,223.6001 424.61841,168.54297 380.00806,169.98193 C 368.38452,170.35693 357.8855,177.48096 354.88599,178.98096 C 351.88647,180.48096 354.13647,183.48047 336.13843,184.23047 C 318.14087,184.97998 312.14136,171.85693 311.76636,154.23389 C 311.55688,144.39697 315.08423,120.9751 318.24194,102.19775 C 290.37524,101.67725 262.46069,98.968262 254.39868,97.991211 C 233.38013,95.443359 217.17456,117.53662 240.52563,141.86035 z " style="fill:#bebcdb;stroke:#000000" id="path2506"/>
-      <path d="M 325.63989,452.69678 C 317.92163,423.11035 287.36353,445.9126 268.64673,447.82227 C 250.27417,449.69727 239.77563,436.57373 239.77563,419.32568 C 239.77563,402.07812 254.02368,395.70361 265.27222,394.5791 C 276.52075,393.4541 282.14526,396.45361 297.89331,407.32715 C 313.64136,418.20117 326.3894,399.45313 327.8894,392.7041 C 329.3894,385.95508 320.76538,342.83545 320.01538,330.46191 C 319.75855,326.2207 320.56372,321.21484 321.58911,315.6377 C 315.92114,317.13525 309.58862,318.82715 302.39282,320.71338 C 263.77222,330.83691 232.27661,318.46338 221.40259,308.71484 C 210.52905,298.96582 229.27661,284.71777 234.90112,279.09326 C 240.52563,273.46924 243.90015,262.59521 239.77563,247.22217 C 235.65112,231.84912 201.90503,222.10059 179.03296,239.34814 C 156.16089,256.59619 180.90796,285.09277 188.40698,293.3418 C 195.90601,301.59033 186.15698,312.08936 170.03442,313.58887 C 160.60962,314.46582 119.15894,313.67676 86.340576,312.87012 C 85.573975,347.74561 84.581299,386.15088 83.794922,402.07812 C 82.295166,432.44922 109.29175,422.32568 115.66577,420.82568 C 122.04028,419.32568 126.16479,409.57715 143.03735,408.45215 C 185.9231,405.59326 186.09985,466.69629 144.16235,467.69482 C 128.41431,468.06982 113.79126,451.19678 108.16675,447.44727 C 102.54272,443.69775 87.919433,442.94775 83.794922,457.9458 C 82.01709,464.41113 78.118652,481.65137 78.098144,496.18994 C 78.071045,515.38037 82.295166,531.81201 82.295166,531.81201 C 82.295166,531.81201 105.54224,526.5625 149.41187,526.5625 C 193.28149,526.5625 199.65552,547.93506 194.78101,558.80859 C 189.90649,569.68213 181.28296,568.93213 179.40796,583.18066 C 172.7063,634.11133 253.34106,631.08203 249.14917,584.68018 C 247.96948,571.62354 237.16528,571.66699 232.27661,557.68359 C 222.17944,528.80273 244.64966,523.56299 257.39819,524.68799 C 263.59351,525.23437 290.95679,529.73389 320.75757,531.21582 C 321.22437,531.23877 321.69312,531.25928 322.16089,531.28125 C 326.09985,518.06592 329.95825,503.87646 330.1394,498.44092 C 330.51392,487.19238 330.1394,469.94434 325.63989,452.69678 z " style="fill:#d3ea9d;stroke:#000000" id="path2508"/>
-		</g>
-  </svg>
-  <script src="../../y.js"></script>
-  <script src='../../../y-websockets-client/y-websockets-client.js'></script>
-  <script src="../bower_components/d3/d3.js"></script>
-  <script src="./index.js"></script>
-</body>
-</html>

examples_all/jigsaw/index.js

@@ -1,67 +0,0 @@
-/* global Y, d3 */
-
-let y = new Y('jigsaw-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-let jigsaw = y.define('jigsaw', Y.Map)
-window.yJigsaw = y
-
-var origin // mouse start position - translation of piece
-var drag = d3.behavior.drag()
-  .on('dragstart', function (params) {
-    // get the translation of the element
-    var translation = d3
-      .select(this)
-      .attr('transform')
-      .slice(10, -1)
-      .split(',')
-      .map(Number)
-    // mouse coordinates
-    var mouse = d3.mouse(this.parentNode)
-    origin = {
-      x: mouse[0] - translation[0],
-      y: mouse[1] - translation[1]
-    }
-  })
-  .on('drag', function () {
-    var mouse = d3.mouse(this.parentNode)
-    var x = mouse[0] - origin.x // =^= mouse - mouse at dragstart + translation at dragstart
-    var y = mouse[1] - origin.y
-    d3.select(this).attr('transform', 'translate(' + x + ',' + y + ')')
-  })
-  .on('dragend', function (piece, i) {
-    // save the current translation of the puzzle piece
-    var mouse = d3.mouse(this.parentNode)
-    var x = mouse[0] - origin.x
-    var y = mouse[1] - origin.y
-    jigsaw.set(piece, {x: x, y: y})
-  })
-
-var data = ['piece1', 'piece2', 'piece3', 'piece4']
-var pieces = d3.select(document.querySelector('#puzzle-example')).selectAll('path').data(data)
-
-pieces
-  .classed('draggable', true)
-  .attr('transform', function (piece) {
-    var translation = piece.get('translation') || {x: 0, y: 0}
-    return 'translate(' + translation.x + ',' + translation.y + ')'
-  }).call(drag)
-
-data.forEach(function (piece) {
-  jigsaw.observe(function () {
-    // whenever a property of a piece changes, update the translation of the pieces
-    pieces
-      .transition()
-      .attr('transform', function (piece) {
-        var translation = piece.get(piece)
-        if (translation == null || typeof translation.x !== 'number' || typeof translation.y !== 'number') {
-          translation = { x: 0, y: 0 }
-        }
-        return 'translate(' + translation.x + ',' + translation.y + ')'
-      })
-  })
-})

examples_all/monaco/index.html

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

examples_all/monaco/index.js

@@ -1,22 +0,0 @@
-/* global Y, monaco */
-
-require.config({ paths: { 'vs': '../node_modules/monaco-editor/min/vs' } })
-
-let y = new Y('monaco-example', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-
-require(['vs/editor/editor.main'], function () {
-  window.yMonaco = y
-
-  // Create Monaco editor
-  var editor = monaco.editor.create(document.getElementById('monacoContainer'), {
-    language: 'javascript'
-  })
-
-  // Bind to y.share.monaco
-  y.define('monaco', Y.Text).bindMonaco(editor)
-})

examples_all/notes/index.html

@@ -1,17 +0,0 @@
-<!DOCTYPE html>
-<html>
-</head>
-  <script src="./index.js" type="module"></script>
-  <link rel="stylesheet" type="text/css" href="style.css">
-</head>
-<body>
-    <div class="sidebar">
-      <h3 id="createNoteButton">+ Create Note</h3>
-      <div class="notelist"></div>
-    </div>
-    <div class="main">
-      <h1 id="headline"></h1>
-      <div id="editor" contenteditable="true"></div>
-    </div>
-</body>
-</html>

examples_all/notes/index.js

@@ -1,132 +0,0 @@
-/* eslint-env browser */
-
-import { createYdbClient } from '../../YdbClient/index.js'
-import Y from '../../src/Y.dist.js'
-import * as ydb from '../../YdbClient/YdbClient.js'
-import DomBinding from '../../bindings/DomBinding/DomBinding.js'
-
-const uuidv4 = () => 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
-  const r = Math.random() * 16 | 0
-  return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16)
-})
-
-createYdbClient('ws://localhost:8899/ws').then(ydbclient => {
-  const y = ydbclient.getY('notelist')
-  let ynotelist = y.define('notelist', Y.Array)
-  window.ynotelist = ynotelist
-  const domNoteList = document.querySelector('.notelist')
-
-  // utils
-  const addEventListener = (element, eventname, f) => element.addEventListener(eventname, f)
-
-  // create note button
-  const createNoteButton = event => {
-    ynotelist.insert(0, [{
-      guid: uuidv4(),
-      title: 'Note #' + ynotelist.length
-    }])
-  }
-  addEventListener(document.querySelector('#createNoteButton'), 'click', createNoteButton)
-  window.createNote = createNoteButton
-  window.createNotes = n => {
-    y.transact(() => {
-      for (let i = 0; i < n; i++) {
-        createNoteButton()
-      }
-    })
-  }
-
-  // clear note list function
-  window.clearNotes = () => ynotelist.delete(0, ynotelist.length)
-
-  // update editor and editor title
-  let domBinding = null
-  const updateEditor = () => {
-    domNoteList.querySelectorAll('a').forEach(a => a.classList.remove('selected'))
-    const domNote = document.querySelector('.notelist').querySelector(`[href="${location.hash}"]`)
-    if (domNote !== null) {
-      domNote.classList.add('selected')
-      const note = ynotelist.toArray().find(note => note.guid === location.hash.slice(1))
-      if (note !== undefined) {
-        const ydoc = ydbclient.getY(note.guid)
-        const ycontent = ydoc.define('content', Y.XmlFragment)
-        if (domBinding !== null) {
-          domBinding.destroy()
-        }
-        domBinding = new DomBinding(ycontent, document.querySelector('#editor'))
-        document.querySelector('#headline').innerText = note.title
-        document.querySelector('#editor').focus()
-      }
-    }
-  }
-
-  // listen to url-hash changes
-  addEventListener(window, 'hashchange', updateEditor)
-  updateEditor()
-
-  const styleSyncedState = (div, noteSyncedState) => {
-    let classes = []
-    if (noteSyncedState.persisted) {
-      classes.push('persisted')
-    } else {
-      if (noteSyncedState.upsynced) {
-        classes.push('upsynced')
-      } else {
-        classes.push('noupsynced')
-      }
-      if (noteSyncedState.downsynced) {
-        classes.push('downsynced')
-      } else {
-        classes.push('nodownsynced')
-      }
-    }
-    div.setAttribute('class', classes.join(' '))
-  }
-
-  ydbclient.on('syncstate', event => event.updated.forEach((state, room) => {
-    const a = document.querySelector(`[href="#${room}"]`)
-    if (a !== null) {
-      styleSyncedState(a.firstChild, state)
-    }
-  }))
-
-  // render note list
-  const renderNoteList = (elementList, insertRef = domNoteList.firstChild) => {
-    const fragment = document.createDocumentFragment()
-    const addNow = elementList.splice(0, 100)
-    addNow.forEach(note => {
-      const a = document.createElement('a')
-      const div = document.createElement('div')
-      a.insertBefore(div, null)
-      a.setAttribute('href', '#' + note.guid)
-      div.innerText = note.title
-      styleSyncedState(div, ydbclient.getRoomState(note.guid))
-      fragment.insertBefore(a, null)
-    })
-    if (domBinding == null) {
-      updateEditor()
-    }
-    domNoteList.insertBefore(fragment, insertRef)
-    if (elementList.length > 0) {
-      setTimeout(() => renderNoteList(elementList, insertRef), 100)
-    }
-  }
-  {
-    const notelist = ynotelist.toArray()
-    if (notelist.length > 0) {
-      renderNoteList(notelist)
-      ydb.subscribeRooms(ydbclient, notelist.map(note => note.guid))
-    }
-  }
-  ynotelist.observe(event => {
-    const addedNotes = []
-    event.addedElements.forEach(itemJson => itemJson._content.forEach(json => addedNotes.push(json)))
-    renderNoteList(addedNotes.slice().reverse()) // renderNoteList modifies addedNotes, so first make a copy of it
-    setTimeout(() => {
-      ydb.subscribeRooms(ydbclient, addedNotes.map(note => note.guid))
-    }, 200)
-    if (domBinding === null) {
-      updateEditor()
-    }
-  })
-})

examples_all/notes/style.css

@@ -1,100 +0,0 @@
-.sidebar {
-    height: 100%; /* Full-height: remove this if you want "auto" height */
-    width: 180px; /* Set the width of the sidebar */
-    position: fixed; /* Fixed Sidebar (stay in place on scroll) */
-    z-index: 1; /* Stay on top */
-    top: 0; /* Stay at the top */
-    left: 0;
-    background-color: #111; /* Black */
-    overflow-x: hidden; /* Disable horizontal scroll */
-    padding-top: 20px;
-    color: #50abff;
-}
-
-#createNoteButton {
-    padding-left: .5em;
-    padding-top: .5em;
-    padding-bottom: .7em;
-    margin: 0;
-    cursor: pointer;
-}
-
-.notelist > a {
-  padding: 6px 8px 6px 16px;
-  text-decoration: none;
-  font-size: 13px;
-  color: #818181;
-  display: block;
-}
-
-.notelist > a.selected {
-  border-style: outset;
-}
-
-.notelist > a > div {
-  position: relative;
-  display: inline;
-}
-
-/* When you mouse over the navigation links, change their color */
-.sidebar a:hover {
-    color: #f1f1f1;
-}
-
-/* Style page content */
-.main {
-    margin-left: 180px; /* Same as the width of the sidebar */
-    padding: 0px 10px;
-}
-
-/* On smaller screens, where height is less than 450px, change the style of the sidebar (less padding and a smaller font size) */
-@media screen and (max-height: 450px) {
-    .sidebar {padding-top: 15px;}
-    .sidebar a {font-size: 18px;}
-}
-
-#editor {
-    min-height: 400px;
-}
-
-[contenteditable]:focus {
-    outline: 0px solid transparent;
-}
-
-.persisted::before { 
-  content: "✔";
-  color: green;
-  position: absolute;
-  right: -14px;
-  top: 0px;
-}
-
-.upsynced::before {
-  content: "↑";
-  color: green;
-  position: absolute;
-  right: -14px;
-  top: 0px;
-}
-
-.noupsynced::before {
-  content: "↑";
-  color: red;
-  position: absolute;
-  right: -14px;
-  top: 0px;
-}
-.downsynced::after {
-  content: "↓";
-  color: green;
-  position: absolute;
-  right: -22px;
-  top: 0px;
-}
-.nodownsynced::after {
-  content: "↓";
-  color: red;
-  position: absolute;
-  right: -22px;
-  top: 0px;
-}

examples_all/quill-cursors/index.html

@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <!-- Main quill library -->
-  <script src="../../node_modules/quill/dist/quill.min.js"></script>
-  <link href="../../node_modules/quill/dist/quill.snow.css" rel="stylesheet">
-  <!-- Quill cursors module -->
-  <script src="../../node_modules/quill-cursors/dist/quill-cursors.min.js"></script>
-  <link href="../../node_modules/quill-cursors/dist/quill-cursors.css" rel="stylesheet">
-  <!-- Yjs Library and connector -->
-  <script src="../../y.js"></script>
-  <script src='../../../y-websockets-client/y-websockets-client.js'></script>
-</head>
-<body>
-  <div id="quill-container">
-    <div id="quill">
-    </div>
-  </div>
-  <script src="./index.js"></script>
-</body>
-</html>

examples_all/quill-cursors/index.js

@@ -1,78 +0,0 @@
-/* global Y, Quill, QuillCursors */
-
-Quill.register('modules/cursors', QuillCursors)
-
-let y = new Y('quill-0', {
-  connector: {
-    name: 'websockets-client',
-    url: 'http://127.0.0.1:1234'
-  }
-})
-let users = y.define('users', Y.Array)
-let myUserInfo = new Y.Map()
-myUserInfo.set('name', 'dada')
-myUserInfo.set('color', 'red')
-users.push([myUserInfo])
-
-let 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' }]
-    ],
-    cursors: {
-      hideDelay: 500
-    }
-  },
-  placeholder: 'Compose an epic...',
-  theme: 'snow' // or 'bubble'
-})
-
-let cursors = quill.getModule('cursors')
-
-const drawCursors = () => {
-  cursors.clearCursors()
-  users.map((user, userId) => {
-    if (user !== myUserInfo) {
-      let relativeRange = user.get('range')
-      let lastUpdated = new Date(user.get('last updated')).getTime()
-      if (lastUpdated != null && new Date().getTime() - lastUpdated < 20000 && relativeRange != null) {
-        let start = Y.utils.fromRelativePosition(y, relativeRange.start).offset
-        let end = Y.utils.fromRelativePosition(y, relativeRange.end).offset
-        let range = { index: start, length: end - start }
-        cursors.setCursor(userId + '', range, user.get('name'), user.get('color'))
-      }
-    }
-  })
-}
-
-users.observeDeep(drawCursors)
-drawCursors()
-
-quill.on('selection-change', function (range) {
-  if (range != null) {
-    myUserInfo.set('range', {
-      start: Y.utils.getRelativePosition(yText, range.index),
-      end: Y.utils.getRelativePosition(yText, range.index + range.length)
-    })
-  } else {
-    myUserInfo.delete('range')
-  }
-  myUserInfo.set('last updated', new Date().toString())
-})
-
-let yText = y.define('quill', Y.Text)
-let quillBinding = new Y.QuillBinding(yText, quill)
-
-window.quillBinding = quillBinding
-window.yText = yText
-window.y = y
-window.quill = quill
-window.users = users
-window.cursors = cursors

examples_all/serviceworker/index.html

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

examples_all/serviceworker/index.js

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

examples_all/serviceworker/yjs-sw-template.js

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

funding.json

@@ -0,0 +1,142 @@
+{
+  "version": "v1.0.0",
+  "entity": {
+    "type": "group",
+    "role": "steward",
+    "name": "Kevin Jahns",
+    "email": "kevin.jahns@protonmail.com",
+    "phone": "",
+    "description": "OSS Developer",
+    "webpageUrl": {
+      "url": "https://github.com/yjs"
+    }
+  },
+  "projects": [
+    {
+      "guid": "yjs",
+      "name": "Yjs",
+      "description": "A library for building collaborative applications. #p2p #local-first #CRDT Funding this project will also enable me to maintain the other Yjs-related technologies.",
+      "webpageUrl": {
+        "url": "https://github.com/yjs/yjs"
+      },
+      "repositoryUrl": {
+        "url": "https://github.com/yjs/yjs"
+      },
+      "licenses": [
+        "spdx:MIT"
+      ],
+      "tags": [
+        "collaboration",
+        "p2p",
+        "CRDT",
+        "rich-text",
+        "real-time"
+      ]
+    },
+    {
+      "guid": "Titanic",
+      "name": "Y/Titanic",
+      "description": "A provider for syncing millions of docs efficiently with other peers. This will become the foundation for building real local-first apps with Yjs.",
+      "webpageUrl": {
+        "url": "https://github.com/yjs/titanic",
+        "wellKnown": "https://github.com/yjs/titanic/blob/main/.well-known/funding-manifest-urls"
+      },
+      "repositoryUrl": {
+        "url": "https://github.com/yjs/titanic",
+        "wellKnown": "https://github.com/yjs/titanic/blob/main/.well-known/funding-manifest-urls"
+      },
+      "licenses": [
+        "spdx:MIT"
+      ],
+      "tags": [
+        "privacy",
+        "collaboration",
+        "p2p",
+        "CRDT",
+        "rich-text",
+        "real-time",
+        "web-development"
+      ]
+    }
+  ],
+  "funding": {
+    "channels": [
+      {
+        "guid": "github-sponsors",
+        "type": "payment-provider",
+        "address": "",
+        "description": "For funding of the Yjs project"
+      },
+      {
+        "guid": "y-collective",
+        "type": "payment-provider",
+        "address": "https://opencollective.com/y-collective",
+        "description": "For funding the Y-CRDT - the Rust implementation of Yjs and other listed projects."
+      }
+    ],
+    "plans": [
+      {
+        "guid": "supporter",
+        "status": "active",
+        "name": "Supporter",
+        "description": "",
+        "amount": 0,
+        "currency": "USD",
+        "frequency": "monthly",
+        "channels": [
+          "github-sponsors",
+          "y-collective"
+        ]
+      },
+      {
+        "guid": "titanic-funding",
+        "status": "active",
+        "name": "Titanic Funding",
+        "description": "Fund the next generation of local-first providers.",
+        "amount": 30000,
+        "currency": "USD",
+        "frequency": "one-time",
+        "channels": [
+          "github-sponsors"
+        ]
+      },
+      {
+        "guid": "bronze-sponsor",
+        "status": "active",
+        "name": "Bronze Sponsor",
+        "description": "This is the recommended plan for companies that use Yjs.",
+        "amount": 500,
+        "currency": "USD",
+        "frequency": "monthly",
+        "channels": [
+          "github-sponsors"
+        ]
+      },
+      {
+        "guid": "silver-sponsor",
+        "status": "active",
+        "name": "Silver Sponsor",
+        "description": "This is the recommended plan for large/successfull companies that use Yjs.",
+        "amount": 1000,
+        "currency": "USD",
+        "frequency": "monthly",
+        "channels": [
+          "github-sponsors"
+        ]
+      },
+      {
+        "guid": "gold-sponsor",
+        "status": "active",
+        "name": "Gold Sponsor",
+        "description": "This is the recommended plan for successful companies that build their entire product around Yjs-related technologies.",
+        "amount": 3000,
+        "currency": "USD",
+        "frequency": "monthly",
+        "channels": [
+          "github-sponsors"
+        ]
+      }
+    ],
+    "history": null
+  }
+}

index.js

@@ -1,57 +0,0 @@
-
-import './structs/Item.js'
-import { Delete } from './structs/Delete.js'
-import { ItemJSON } from './structs/ItemJSON.js'
-import { ItemString } from './structs/ItemString.js'
-import { ItemFormat } from './structs/ItemFormat.js'
-import { ItemEmbed } from './structs/ItemEmbed.js'
-import { ItemBinary } from './structs/ItemBinary.js'
-import { GC } from './structs/GC.js'
-
-import { YArray } from './types/YArray.js'
-import { YMap } from './types/YMap.js'
-import { YText } from './types/YText.js'
-import { YXmlText } from './types/YXmlText.js'
-import { YXmlHook } from './types/YXmlHook.js'
-import { YXmlElement, YXmlFragment } from './types/YXmlElement.js'
-
-import { registerStruct } from './utils/structReferences.js'
-
-import * as decoding from './lib/decoding.js'
-import * as encoding from './lib/encoding.js'
-import * as awarenessProtocol from './protocols/awareness.js'
-import * as syncProtocol from './protocols/sync.js'
-import * as authProtocol from './protocols/auth.js'
-
-export { decoding, encoding, awarenessProtocol, syncProtocol, authProtocol }
-
-export { Y } from './utils/Y.js'
-export { UndoManager } from './utils/UndoManager.js'
-export { Transaction } from './utils/Transaction.js'
-
-export { YArray as Array } from './types/YArray.js'
-export { YMap as Map } from './types/YMap.js'
-export { YText as Text } from './types/YText.js'
-export { YXmlText as XmlText } from './types/YXmlText.js'
-export { YXmlHook as XmlHook } from './types/YXmlHook.js'
-export { YXmlElement as XmlElement, YXmlFragment as XmlFragment } from './types/YXmlElement.js'
-
-export { getRelativePosition, fromRelativePosition } from './utils/relativePosition.js'
-export { registerStruct } from './utils/structReferences.js'
-export * from './lib/mutex.js'
-
-registerStruct(0, GC)
-registerStruct(1, ItemJSON)
-registerStruct(2, ItemString)
-registerStruct(3, ItemFormat)
-registerStruct(4, Delete)
-
-registerStruct(5, YArray)
-registerStruct(6, YMap)
-registerStruct(7, YText)
-registerStruct(8, YXmlFragment)
-registerStruct(9, YXmlElement)
-registerStruct(10, YXmlText)
-registerStruct(11, YXmlHook)
-registerStruct(12, ItemEmbed)
-registerStruct(13, ItemBinary)

lib/NamedEventHandler.js

@@ -1,113 +0,0 @@
-
-/**
- * Handles named events.
- */
-export class NamedEventHandler {
-  constructor () {
-    this._eventListener = new Map()
-    this._stateListener = new Map()
-  }
-
-  /**
-   * @private
-   * Returns all listeners that listen to a specified name.
-   *
-   * @param {String} name The query event name.
-   */
-  _getListener (name) {
-    let listeners = this._eventListener.get(name)
-    if (listeners === undefined) {
-      listeners = {
-        once: new Set(),
-        on: new Set()
-      }
-      this._eventListener.set(name, listeners)
-    }
-    return listeners
-  }
-
-  /**
-   * Adds a named event listener. The listener is removed after it has been
-   * called once.
-   *
-   * @param {String} name The event name to listen to.
-   * @param {Function} f The function that is executed when the event is fired.
-   */
-  once (name, f) {
-    let listeners = this._getListener(name)
-    listeners.once.add(f)
-  }
-
-  /**
-   * Adds a named event listener.
-   *
-   * @param {String} name The event name to listen to.
-   * @param {Function} f The function that is executed when the event is fired.
-   */
-  on (name, f) {
-    let listeners = this._getListener(name)
-    listeners.on.add(f)
-  }
-
-  /**
-   * @private
-   * Init the saved state for an event name.
-   */
-  _initStateListener (name) {
-    let state = this._stateListener.get(name)
-    if (state === undefined) {
-      state = {}
-      state.promise = new Promise(resolve => {
-        state.resolve = resolve
-      })
-      this._stateListener.set(name, state)
-    }
-    return state
-  }
-
-  /**
-   * Returns a Promise that is resolved when the event name is called.
-   * The Promise is immediately resolved when the event name was called in the
-   * past.
-   */
-  when (name) {
-    return this._initStateListener(name).promise
-  }
-
-  /**
-   * Remove an event listener that was registered with either
-   * {@link EventHandler#on} or {@link EventHandler#once}.
-   */
-  off (name, f) {
-    if (name == null || f == null) {
-      throw new Error('You must specify event name and function!')
-    }
-    const listener = this._eventListener.get(name)
-    if (listener !== undefined) {
-      listener.on.delete(f)
-      listener.once.delete(f)
-    }
-  }
-
-  /**
-   * Emit a named event. All registered event listeners that listen to the
-   * specified name will receive the event.
-   *
-   * @param {String} name The event name.
-   * @param {Array} args The arguments that are applied to the event listener.
-   */
-  emit (name, ...args) {
-    this._initStateListener(name).resolve()
-    const listener = this._eventListener.get(name)
-    if (listener !== undefined) {
-      listener.on.forEach(f => f.apply(null, args))
-      listener.once.forEach(f => f.apply(null, args))
-      listener.once = new Set()
-    } else if (name === 'error') {
-      console.error(args[0])
-    }
-  }
-  destroy () {
-    this._eventListener = null
-  }
-}

lib/Tree.js

@@ -1,468 +0,0 @@
-/**
- * @module tree
- */
-
-const rotate = (tree, parent, newParent, n) => {
-  if (parent === null) {
-    tree.root = newParent
-    newParent._parent = null
-  } else if (parent.left === n) {
-    parent.left = newParent
-  } else if (parent.right === n) {
-    parent.right = newParent
-  } else {
-    throw new Error('The elements are wrongly connected!')
-  }
-}
-
-class N {
-  // A created node is always red!
-  constructor (val) {
-    this.val = val
-    this.color = true
-    this._left = null
-    this._right = null
-    this._parent = null
-  }
-  isRed () { return this.color }
-  isBlack () { return !this.color }
-  redden () { this.color = true; return this }
-  blacken () { this.color = false; return this }
-  get grandparent () {
-    return this.parent.parent
-  }
-  get parent () {
-    return this._parent
-  }
-  get sibling () {
-    return (this === this.parent.left)
-      ? this.parent.right : this.parent.left
-  }
-  get left () {
-    return this._left
-  }
-  get right () {
-    return this._right
-  }
-  set left (n) {
-    if (n !== null) {
-      n._parent = this
-    }
-    this._left = n
-  }
-  set right (n) {
-    if (n !== null) {
-      n._parent = this
-    }
-    this._right = n
-  }
-  rotateLeft (tree) {
-    const parent = this.parent
-    const newParent = this.right
-    const newRight = this.right.left
-    newParent.left = this
-    this.right = newRight
-    rotate(tree, parent, newParent, this)
-  }
-  next () {
-    if (this.right !== null) {
-      // search the most left node in the right tree
-      var o = this.right
-      while (o.left !== null) {
-        o = o.left
-      }
-      return o
-    } else {
-      var p = this
-      while (p.parent !== null && p !== p.parent.left) {
-        p = p.parent
-      }
-      return p.parent
-    }
-  }
-  prev () {
-    if (this.left !== null) {
-      // search the most right node in the left tree
-      var o = this.left
-      while (o.right !== null) {
-        o = o.right
-      }
-      return o
-    } else {
-      var p = this
-      while (p.parent !== null && p !== p.parent.right) {
-        p = p.parent
-      }
-      return p.parent
-    }
-  }
-  rotateRight (tree) {
-    const parent = this.parent
-    const newParent = this.left
-    const newLeft = this.left.right
-    newParent.right = this
-    this.left = newLeft
-    rotate(tree, parent, newParent, this)
-  }
-  getUncle () {
-    // we can assume that grandparent exists when this is called!
-    if (this.parent === this.parent.parent.left) {
-      return this.parent.parent.right
-    } else {
-      return this.parent.parent.left
-    }
-  }
-}
-
-const isBlack = node =>
-  node !== null ? node.isBlack() : true
-
-const isRed = (node) =>
-  node !== null ? node.isRed() : false
-
-/*
- * This is a Red Black Tree implementation
- */
-export class Tree {
-  constructor () {
-    this.root = null
-    this.length = 0
-  }
-  findNext (id) {
-    var nextID = id.clone()
-    nextID.clock += 1
-    return this.findWithLowerBound(nextID)
-  }
-  findPrev (id) {
-    let prevID = id.clone()
-    prevID.clock -= 1
-    return this.findWithUpperBound(prevID)
-  }
-  findNodeWithLowerBound (from) {
-    var o = this.root
-    if (o === null) {
-      return null
-    } else {
-      while (true) {
-        if (from === null || (from.lessThan(o.val._id) && o.left !== null)) {
-          // o is included in the bound
-          // try to find an element that is closer to the bound
-          o = o.left
-        } else if (from !== null && o.val._id.lessThan(from)) {
-          // o is not within the bound, maybe one of the right elements is..
-          if (o.right !== null) {
-            o = o.right
-          } else {
-            // there is no right element. Search for the next bigger element,
-            // this should be within the bounds
-            return o.next()
-          }
-        } else {
-          return o
-        }
-      }
-    }
-  }
-  findNodeWithUpperBound (to) {
-    if (to === void 0) {
-      throw new Error('You must define from!')
-    }
-    var o = this.root
-    if (o === null) {
-      return null
-    } else {
-      while (true) {
-        if ((to === null || o.val._id.lessThan(to)) && o.right !== null) {
-          // o is included in the bound
-          // try to find an element that is closer to the bound
-          o = o.right
-        } else if (to !== null && to.lessThan(o.val._id)) {
-          // o is not within the bound, maybe one of the left elements is..
-          if (o.left !== null) {
-            o = o.left
-          } else {
-            // there is no left element. Search for the prev smaller element,
-            // this should be within the bounds
-            return o.prev()
-          }
-        } else {
-          return o
-        }
-      }
-    }
-  }
-  findSmallestNode () {
-    var o = this.root
-    while (o != null && o.left != null) {
-      o = o.left
-    }
-    return o
-  }
-  findWithLowerBound (from) {
-    var n = this.findNodeWithLowerBound(from)
-    return n == null ? null : n.val
-  }
-  findWithUpperBound (to) {
-    var n = this.findNodeWithUpperBound(to)
-    return n == null ? null : n.val
-  }
-  iterate (from, to, f) {
-    var o
-    if (from === null) {
-      o = this.findSmallestNode()
-    } else {
-      o = this.findNodeWithLowerBound(from)
-    }
-    while (
-      o !== null &&
-      (
-        to === null || // eslint-disable-line no-unmodified-loop-condition
-        o.val._id.lessThan(to) ||
-        o.val._id.equals(to)
-      )
-    ) {
-      f(o.val)
-      o = o.next()
-    }
-  }
-  find (id) {
-    let n = this.findNode(id)
-    if (n !== null) {
-      return n.val
-    } else {
-      return null
-    }
-  }
-  findNode (id) {
-    var o = this.root
-    if (o === null) {
-      return null
-    } else {
-      while (true) {
-        if (o === null) {
-          return null
-        }
-        if (id.lessThan(o.val._id)) {
-          o = o.left
-        } else if (o.val._id.lessThan(id)) {
-          o = o.right
-        } else {
-          return o
-        }
-      }
-    }
-  }
-  delete (id) {
-    var d = this.findNode(id)
-    if (d == null) {
-      // throw new Error('Element does not exist!')
-      return
-    }
-    this.length--
-    if (d.left !== null && d.right !== null) {
-      // switch d with the greates element in the left subtree.
-      // o should have at most one child.
-      var o = d.left
-      // find
-      while (o.right !== null) {
-        o = o.right
-      }
-      // switch
-      d.val = o.val
-      d = o
-    }
-    // d has at most one child
-    // let n be the node that replaces d
-    var isFakeChild
-    var child = d.left || d.right
-    if (child === null) {
-      isFakeChild = true
-      child = new N(null)
-      child.blacken()
-      d.right = child
-    } else {
-      isFakeChild = false
-    }
-
-    if (d.parent === null) {
-      if (!isFakeChild) {
-        this.root = child
-        child.blacken()
-        child._parent = null
-      } else {
-        this.root = null
-      }
-      return
-    } else if (d.parent.left === d) {
-      d.parent.left = child
-    } else if (d.parent.right === d) {
-      d.parent.right = child
-    } else {
-      throw new Error('Impossible!')
-    }
-    if (d.isBlack()) {
-      if (child.isRed()) {
-        child.blacken()
-      } else {
-        this._fixDelete(child)
-      }
-    }
-    this.root.blacken()
-    if (isFakeChild) {
-      if (child.parent.left === child) {
-        child.parent.left = null
-      } else if (child.parent.right === child) {
-        child.parent.right = null
-      } else {
-        throw new Error('Impossible #3')
-      }
-    }
-  }
-  _fixDelete (n) {
-    if (n.parent === null) {
-      // this can only be called after the first iteration of fixDelete.
-      return
-    }
-    // d was already replaced by the child
-    // d is not the root
-    // d and child are black
-    var sibling = n.sibling
-    if (isRed(sibling)) {
-      // make sibling the grandfather
-      n.parent.redden()
-      sibling.blacken()
-      if (n === n.parent.left) {
-        n.parent.rotateLeft(this)
-      } else if (n === n.parent.right) {
-        n.parent.rotateRight(this)
-      } else {
-        throw new Error('Impossible #2')
-      }
-      sibling = n.sibling
-    }
-    // parent, sibling, and children of n are black
-    if (n.parent.isBlack() &&
-      sibling.isBlack() &&
-      isBlack(sibling.left) &&
-      isBlack(sibling.right)
-    ) {
-      sibling.redden()
-      this._fixDelete(n.parent)
-    } else if (n.parent.isRed() &&
-      sibling.isBlack() &&
-      isBlack(sibling.left) &&
-      isBlack(sibling.right)
-    ) {
-      sibling.redden()
-      n.parent.blacken()
-    } else {
-      if (n === n.parent.left &&
-        sibling.isBlack() &&
-        isRed(sibling.left) &&
-        isBlack(sibling.right)
-      ) {
-        sibling.redden()
-        sibling.left.blacken()
-        sibling.rotateRight(this)
-        sibling = n.sibling
-      } else if (n === n.parent.right &&
-        sibling.isBlack() &&
-        isRed(sibling.right) &&
-        isBlack(sibling.left)
-      ) {
-        sibling.redden()
-        sibling.right.blacken()
-        sibling.rotateLeft(this)
-        sibling = n.sibling
-      }
-      sibling.color = n.parent.color
-      n.parent.blacken()
-      if (n === n.parent.left) {
-        sibling.right.blacken()
-        n.parent.rotateLeft(this)
-      } else {
-        sibling.left.blacken()
-        n.parent.rotateRight(this)
-      }
-    }
-  }
-  put (v) {
-    var node = new N(v)
-    if (this.root !== null) {
-      var p = this.root // p abbrev. parent
-      while (true) {
-        if (node.val._id.lessThan(p.val._id)) {
-          if (p.left === null) {
-            p.left = node
-            break
-          } else {
-            p = p.left
-          }
-        } else if (p.val._id.lessThan(node.val._id)) {
-          if (p.right === null) {
-            p.right = node
-            break
-          } else {
-            p = p.right
-          }
-        } else {
-          p.val = node.val
-          return p
-        }
-      }
-      this._fixInsert(node)
-    } else {
-      this.root = node
-    }
-    this.length++
-    this.root.blacken()
-    return node
-  }
-  _fixInsert (n) {
-    if (n.parent === null) {
-      n.blacken()
-      return
-    } else if (n.parent.isBlack()) {
-      return
-    }
-    var uncle = n.getUncle()
-    if (uncle !== null && uncle.isRed()) {
-      // Note: parent: red, uncle: red
-      n.parent.blacken()
-      uncle.blacken()
-      n.grandparent.redden()
-      this._fixInsert(n.grandparent)
-    } else {
-      // Note: parent: red, uncle: black or null
-      // Now we transform the tree in such a way that
-      // either of these holds:
-      //   1) grandparent.left.isRed
-      //     and grandparent.left.left.isRed
-      //   2) grandparent.right.isRed
-      //     and grandparent.right.right.isRed
-      if (n === n.parent.right && n.parent === n.grandparent.left) {
-        n.parent.rotateLeft(this)
-        // Since we rotated and want to use the previous
-        // cases, we need to set n in such a way that
-        // n.parent.isRed again
-        n = n.left
-      } else if (n === n.parent.left && n.parent === n.grandparent.right) {
-        n.parent.rotateRight(this)
-        // see above
-        n = n.right
-      }
-      // Case 1) or 2) hold from here on.
-      // Now traverse grandparent, make parent a black node
-      // on the highest level which holds two red nodes.
-      n.parent.blacken()
-      n.grandparent.redden()
-      if (n === n.parent.left) {
-        // Case 1
-        n.grandparent.rotateRight(this)
-      } else {
-        // Case 2
-        n.grandparent.rotateLeft(this)
-      }
-    }
-  }
-}

lib/binary.js

@@ -1,40 +0,0 @@
-/* eslint-env browser */
-
-/**
- * @module binary
- */
-
-import * as string from './string.js'
-import * as globals from './globals.js'
-
-export const BITS32 = 0xFFFFFFFF
-export const BITS21 = (1 << 21) - 1
-export const BITS16 = (1 << 16) - 1
-
-export const BIT26 = 1 << 26
-export const BIT32 = 1 << 32
-
-/**
- * @param {Uint8Array} bytes
- * @return {string}
- */
-export const toBase64 = bytes => {
-  let s = ''
-  for (let i = 0; i < bytes.byteLength; i++) {
-    s += string.fromCharCode(bytes[i])
-  }
-  return btoa(s)
-}
-
-/**
- * @param {string} s
- * @return {Uint8Array}
- */
-export const fromBase64 = s => {
-  const a = atob(s)
-  const bytes = globals.createUint8ArrayFromLen(a.length)
-  for (let i = 0; i < a.length; i++) {
-    bytes[i] = a.charCodeAt(i)
-  }
-  return bytes
-}

lib/broadcastchannel.js

@@ -1,72 +0,0 @@
-/* eslint-env browser */
-
-import * as binary from './binary.js'
-import * as globals from './globals.js'
-
-/**
- * @typedef {Object} Channel
- * @property {Set<Function>} Channel.subs
- * @property {BC} Channel.bc
- */
-
-/**
- * @type {Map<string, Channel>}
- */
-const channels = new Map()
-
-class LocalStoragePolyfill {
-  constructor (room) {
-    this.room = room
-    this.onmessage = null
-    addEventListener('storage', e => e.key === room && this.onmessage !== null && this.onmessage({ data: binary.fromBase64(e.newValue) }))
-  }
-  /**
-   * @param {ArrayBuffer} data
-   */
-  postMessage (buf) {
-    if (typeof localStorage !== 'undefined') {
-      localStorage.setItem(this.room, binary.toBase64(globals.createUint8ArrayFromArrayBuffer(buf)))
-    }
-  }
-}
-
-// Use BroadcastChannel or Polyfill
-const BC = typeof BroadcastChannel === 'undefined' ? LocalStoragePolyfill : BroadcastChannel
-
-/**
- * @param {string} room
- * @return {Channel}
- */
-const getChannel = room => {
-  let c = channels.get(room)
-  if (c === undefined) {
-    const subs = new Set()
-    const bc = new BC(room)
-    bc.onmessage = e => subs.forEach(sub => sub(e.data))
-    c = {
-      bc, subs
-    }
-    channels.set(room, c)
-  }
-  return c
-}
-
-/**
- * @function
- * @param {string} room
- * @param {Function} f
- */
-export const subscribe = (room, f) => getChannel(room).subs.add(f)
-
-/**
- * Publish data to all subscribers (including subscribers on this tab)
- *
- * @function
- * @param {string} room
- * @param {ArrayBuffer} data
- */
-export const publish = (room, data) => {
-  const c = getChannel(room)
-  c.bc.postMessage(data)
-  c.subs.forEach(sub => sub(data))
-}

lib/decoding.js

@@ -1,205 +0,0 @@
-/**
- * @module decoding
- */
-
-/* global Buffer */
-
-import * as globals from './globals.js'
-
-/**
- * A Decoder handles the decoding of an ArrayBuffer.
- */
-export class Decoder {
-  /**
-   * @param {ArrayBuffer} buffer Binary data to decode
-   */
-  constructor (buffer) {
-    this.arr = new Uint8Array(buffer)
-    this.pos = 0
-  }
-}
-
-/**
- * @function
- * @param {ArrayBuffer} buffer
- * @return {Decoder}
- */
-export const createDecoder = buffer => new Decoder(buffer)
-
-/**
- * @function
- * @param {Decoder} decoder
- * @return {boolean}
- */
-export const hasContent = decoder => decoder.pos !== decoder.arr.length
-
-/**
- * Clone a decoder instance.
- * Optionally set a new position parameter.
- *
- * @function
- * @param {Decoder} decoder The decoder instance
- * @param {number} [newPos] Defaults to current position
- * @return {Decoder} A clone of `decoder`
- */
-export const clone = (decoder, newPos = decoder.pos) => {
-  let _decoder = createDecoder(decoder.arr.buffer)
-  _decoder.pos = newPos
-  return _decoder
-}
-
-/**
- * Read `len` bytes as an ArrayBuffer.
- * @function
- * @param {Decoder} decoder The decoder instance
- * @param {number} len The length of bytes to read
- * @return {ArrayBuffer}
- */
-export const readArrayBuffer = (decoder, len) => {
-  const arrayBuffer = globals.createUint8ArrayFromLen(len)
-  const view = globals.createUint8ArrayFromBuffer(decoder.arr.buffer, decoder.pos, len)
-  arrayBuffer.set(view)
-  decoder.pos += len
-  return arrayBuffer.buffer
-}
-
-/**
- * Read variable length payload as ArrayBuffer
- * @function
- * @param {Decoder} decoder
- * @return {ArrayBuffer}
- */
-export const readPayload = decoder => readArrayBuffer(decoder, readVarUint(decoder))
-
-/**
- * Read the rest of the content as an ArrayBuffer
- * @function
- * @param {Decoder} decoder
- * @return {ArrayBuffer}
- */
-export const readTail = decoder => readArrayBuffer(decoder, decoder.arr.length - decoder.pos)
-
-/**
- * Skip one byte, jump to the next position.
- * @function
- * @param {Decoder} decoder The decoder instance
- * @return {number} The next position
- */
-export const skip8 = decoder => decoder.pos++
-
-/**
- * Read one byte as unsigned integer.
- * @function
- * @param {Decoder} decoder The decoder instance
- * @return {number} Unsigned 8-bit integer
- */
-export const readUint8 = decoder => decoder.arr[decoder.pos++]
-
-/**
- * Read 4 bytes as unsigned integer.
- *
- * @function
- * @param {Decoder} decoder
- * @return {number} An unsigned integer.
- */
-export const readUint32 = decoder => {
-  let uint =
-    decoder.arr[decoder.pos] +
-    (decoder.arr[decoder.pos + 1] << 8) +
-    (decoder.arr[decoder.pos + 2] << 16) +
-    (decoder.arr[decoder.pos + 3] << 24)
-  decoder.pos += 4
-  return uint
-}
-
-/**
- * Look ahead without incrementing position.
- * to the next byte and read it as unsigned integer.
- *
- * @function
- * @param {Decoder} decoder
- * @return {number} An unsigned integer.
- */
-export const peekUint8 = decoder => decoder.arr[decoder.pos]
-
-/**
- * Read unsigned integer (32bit) with variable length.
- * 1/8th of the storage is used as encoding overhead.
- *  * numbers < 2^7 is stored in one bytlength
- *  * numbers < 2^14 is stored in two bylength
- *
- * @function
- * @param {Decoder} decoder
- * @return {number} An unsigned integer.length
- */
-export const readVarUint = decoder => {
-  let num = 0
-  let len = 0
-  while (true) {
-    let r = decoder.arr[decoder.pos++]
-    num = num | ((r & 0b1111111) << len)
-    len += 7
-    if (r < 1 << 7) {
-      return num >>> 0 // return unsigned number!
-    }
-    if (len > 35) {
-      throw new Error('Integer out of range!')
-    }
-  }
-}
-
-/**
- * Look ahead and read varUint without incrementing position
- *
- * @function
- * @param {Decoder} decoder
- * @return {number}
- */
-export const peekVarUint = decoder => {
-  let pos = decoder.pos
-  let s = readVarUint(decoder)
-  decoder.pos = pos
-  return s
-}
-
-/**
- * Read string of variable length
- * * varUint is used to store the length of the string
- *
- * Transforming utf8 to a string is pretty expensive. The code performs 10x better
- * when String.fromCodePoint is fed with all characters as arguments.
- * But most environments have a maximum number of arguments per functions.
- * For effiency reasons we apply a maximum of 10000 characters at once.
- *
- * @function
- * @param {Decoder} decoder
- * @return {String} The read String.
- */
-export const readVarString = decoder => {
-  let remainingLen = readVarUint(decoder)
-  let encodedString = ''
-  while (remainingLen > 0) {
-    const nextLen = remainingLen < 10000 ? remainingLen : 10000
-    const bytes = new Array(nextLen)
-    for (let i = 0; i < nextLen; i++) {
-      bytes[i] = decoder.arr[decoder.pos++]
-    }
-    encodedString += String.fromCodePoint.apply(null, bytes)
-    remainingLen -= nextLen
-  }
-  return decodeURIComponent(escape(encodedString))
-}
-
-/**
- * Look ahead and read varString without incrementing position
- *
- * @function
- * @param {Decoder} decoder
- * @return {string}
- */
-export const peekVarString = decoder => {
-  let pos = decoder.pos
-  let s = readVarString(decoder)
-  decoder.pos = pos
-  return s
-}

lib/diff.js

@@ -1,50 +0,0 @@
-/**
- * @module diff
- */
-
-/**
- * A SimpleDiff describes a change on a String.
- *
- * @example
- * console.log(a) // the old value
- * console.log(b) // the updated value
- * // Apply changes of diff (pseudocode)
- * a.remove(diff.pos, diff.remove) // Remove `diff.remove` characters
- * a.insert(diff.pos, diff.insert) // Insert `diff.insert`
- * a === b // values match
- *
- * @typedef {Object} SimpleDiff
- * @property {Number} pos The index where changes were applied
- * @property {Number} remove The number of characters to delete starting
- *                                  at `index`.
- * @property {String} insert The new text to insert at `index` after applying
- *                           `delete`
- */
-
-/**
- * Create a diff between two strings. This diff implementation is highly
- * efficient, but not very sophisticated.
- *
- * @public
- * @param {String} a The old version of the string
- * @param {String} b The updated version of the string
- * @return {SimpleDiff} The diff description.
- */
-export const simpleDiff = (a, b) => {
-  let left = 0 // number of same characters counting from left
-  let right = 0 // number of same characters counting from right
-  while (left < a.length && left < b.length && a[left] === b[left]) {
-    left++
-  }
-  if (left !== a.length || left !== b.length) {
-    // Only check right if a !== b
-    while (right + left < a.length && right + left < b.length && a[a.length - right - 1] === b[b.length - right - 1]) {
-      right++
-    }
-  }
-  return {
-    pos: left, // TODO: rename to index (also in type above)
-    remove: a.length - left - right,
-    insert: b.slice(left, b.length - right)
-  }
-}

lib/encoding.js

@@ -1,243 +0,0 @@
-/**
- * @module encoding
- */
-import * as globals from './globals.js'
-
-const bits7 = 0b1111111
-const bits8 = 0b11111111
-
-/**
- * A BinaryEncoder handles the encoding to an ArrayBuffer.
- */
-export class Encoder {
-  constructor () {
-    this.cpos = 0
-    this.cbuf = globals.createUint8ArrayFromLen(1000)
-    this.bufs = []
-  }
-}
-
-/**
- * @function
- * @return {Encoder}
- */
-export const createEncoder = () => new Encoder()
-
-/**
- * The current length of the encoded data.
- *
- * @function
- * @param {Encoder} encoder
- * @return {number}
- */
-export const length = encoder => {
-  let len = encoder.cpos
-  for (let i = 0; i < encoder.bufs.length; i++) {
-    len += encoder.bufs[i].length
-  }
-  return len
-}
-
-/**
- * Transform to ArrayBuffer. TODO: rename to .toArrayBuffer
- *
- * @function
- * @param {Encoder} encoder
- * @return {ArrayBuffer} The created ArrayBuffer.
- */
-export const toBuffer = encoder => {
-  const uint8arr = globals.createUint8ArrayFromLen(length(encoder))
-  let curPos = 0
-  for (let i = 0; i < encoder.bufs.length; i++) {
-    let d = encoder.bufs[i]
-    uint8arr.set(d, curPos)
-    curPos += d.length
-  }
-  uint8arr.set(globals.createUint8ArrayFromBuffer(encoder.cbuf.buffer, 0, encoder.cpos), curPos)
-  return uint8arr.buffer
-}
-
-/**
- * Write one byte to the encoder.
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} num The byte that is to be encoded.
- */
-export const write = (encoder, num) => {
-  if (encoder.cpos === encoder.cbuf.length) {
-    encoder.bufs.push(encoder.cbuf)
-    encoder.cbuf = globals.createUint8ArrayFromLen(encoder.cbuf.length * 2)
-    encoder.cpos = 0
-  }
-  encoder.cbuf[encoder.cpos++] = num
-}
-
-/**
- * Write one byte at a specific position.
- * Position must already be written (i.e. encoder.length > pos)
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} pos Position to which to write data
- * @param {number} num Unsigned 8-bit integer
- */
-export const set = (encoder, pos, num) => {
-  let buffer = null
-  // iterate all buffers and adjust position
-  for (let i = 0; i < encoder.bufs.length && buffer === null; i++) {
-    const b = encoder.bufs[i]
-    if (pos < b.length) {
-      buffer = b // found buffer
-    } else {
-      pos -= b.length
-    }
-  }
-  if (buffer === null) {
-    // use current buffer
-    buffer = encoder.cbuf
-  }
-  buffer[pos] = num
-}
-
-/**
- * Write one byte as an unsigned integer.
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} num The number that is to be encoded.
- */
-export const writeUint8 = (encoder, num) => write(encoder, num & bits8)
-
-/**
- * Write one byte as an unsigned Integer at a specific location.
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} pos The location where the data will be written.
- * @param {number} num The number that is to be encoded.
- */
-export const setUint8 = (encoder, pos, num) => set(encoder, pos, num & bits8)
-
-/**
- * Write two bytes as an unsigned integer.
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} num The number that is to be encoded.
- */
-export const writeUint16 = (encoder, num) => {
-  write(encoder, num & bits8)
-  write(encoder, (num >>> 8) & bits8)
-}
-/**
- * Write two bytes as an unsigned integer at a specific location.
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} pos The location where the data will be written.
- * @param {number} num The number that is to be encoded.
- */
-export const setUint16 = (encoder, pos, num) => {
-  set(encoder, pos, num & bits8)
-  set(encoder, pos + 1, (num >>> 8) & bits8)
-}
-
-/**
- * Write two bytes as an unsigned integer
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} num The number that is to be encoded.
- */
-export const writeUint32 = (encoder, num) => {
-  for (let i = 0; i < 4; i++) {
-    write(encoder, num & bits8)
-    num >>>= 8
-  }
-}
-
-/**
- * Write two bytes as an unsigned integer at a specific location.
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} pos The location where the data will be written.
- * @param {number} num The number that is to be encoded.
- */
-export const setUint32 = (encoder, pos, num) => {
-  for (let i = 0; i < 4; i++) {
-    set(encoder, pos + i, num & bits8)
-    num >>>= 8
-  }
-}
-
-/**
- * Write a variable length unsigned integer.
- *
- * Encodes integers in the range from [0, 4294967295] / [0, 0xffffffff]. (max 32 bit unsigned integer)
- *
- * @function
- * @param {Encoder} encoder
- * @param {number} num The number that is to be encoded.
- */
-export const writeVarUint = (encoder, num) => {
-  while (num >= 0b10000000) {
-    write(encoder, 0b10000000 | (bits7 & num))
-    num >>>= 7
-  }
-  write(encoder, bits7 & num)
-}
-
-/**
- * Write a variable length string.
- *
- * @function
- * @param {Encoder} encoder
- * @param {String} str The string that is to be encoded.
- */
-export const writeVarString = (encoder, str) => {
-  const encodedString = unescape(encodeURIComponent(str))
-  const len = encodedString.length
-  writeVarUint(encoder, len)
-  for (let i = 0; i < len; i++) {
-    write(encoder, encodedString.codePointAt(i))
-  }
-}
-
-/**
- * Write the content of another Encoder.
- *
- * TODO: can be improved!
- *
- * @function
- * @param {Encoder} encoder The enUint8Arr
- * @param {Encoder} append The BinaryEncoder to be written.
- */
-export const writeBinaryEncoder = (encoder, append) => writeArrayBuffer(encoder, toBuffer(append))
-
-/**
- * Append an arrayBuffer to the encoder.
- *
- * @function
- * @param {Encoder} encoder
- * @param {ArrayBuffer} arrayBuffer
- */
-export const writeArrayBuffer = (encoder, arrayBuffer) => {
-  const prevBufferLen = encoder.cbuf.length
-  // TODO: Append to cbuf if possible
-  encoder.bufs.push(globals.createUint8ArrayFromBuffer(encoder.cbuf.buffer, 0, encoder.cpos))
-  encoder.bufs.push(globals.createUint8ArrayFromArrayBuffer(arrayBuffer))
-  encoder.cbuf = globals.createUint8ArrayFromLen(prevBufferLen)
-  encoder.cpos = 0
-}
-
-/**
- * @function
- * @param {Encoder} encoder
- * @param {ArrayBuffer} arrayBuffer
- */
-export const writePayload = (encoder, arrayBuffer) => {
-  writeVarUint(encoder, arrayBuffer.byteLength)
-  writeArrayBuffer(encoder, arrayBuffer)
-}

lib/encoding.test.js

@@ -1,49 +0,0 @@
-import * as encoding from './encoding.js'
-
-/**
- * Check if binary encoding is compatible with golang binary encoding - binary.PutVarUint.
- *
- * Result: is compatible up to 32 bit: [0, 4294967295] / [0, 0xffffffff]. (max 32 bit unsigned integer)
- */
-let err = null
-try {
-  const tests = [
-    { in: 0, out: [0] },
-    { in: 1, out: [1] },
-    { in: 128, out: [128, 1] },
-    { in: 200, out: [200, 1] },
-    { in: 32, out: [32] },
-    { in: 500, out: [244, 3] },
-    { in: 256, out: [128, 2] },
-    { in: 700, out: [188, 5] },
-    { in: 1024, out: [128, 8] },
-    { in: 1025, out: [129, 8] },
-    { in: 4048, out: [208, 31] },
-    { in: 5050, out: [186, 39] },
-    { in: 1000000, out: [192, 132, 61] },
-    { in: 34951959, out: [151, 166, 213, 16] },
-    { in: 2147483646, out: [254, 255, 255, 255, 7] },
-    { in: 2147483647, out: [255, 255, 255, 255, 7] },
-    { in: 2147483648, out: [128, 128, 128, 128, 8] },
-    { in: 2147483700, out: [180, 128, 128, 128, 8] },
-    { in: 4294967294, out: [254, 255, 255, 255, 15] },
-    { in: 4294967295, out: [255, 255, 255, 255, 15] }
-  ]
-  tests.forEach(test => {
-    const encoder = encoding.createEncoder()
-    encoding.writeVarUint(encoder, test.in)
-    const buffer = new Uint8Array(encoding.toBuffer(encoder))
-    if (buffer.byteLength !== test.out.length) {
-      throw new Error('Length don\'t match!')
-    }
-    for (let j = 0; j < buffer.length; j++) {
-      if (buffer[j] !== test[1][j]) {
-        throw new Error('values don\'t match!')
-      }
-    }
-  })
-} catch (error) {
-  err = error
-} finally {
-  console.log('YDB Client: Encoding varUint compatiblity test: ', err || 'success!')
-}

lib/globals.js

@@ -1,65 +0,0 @@
-/**
- * @module globals
- */
-
-/* eslint-env browser */
-
-export const Uint8Array_ = Uint8Array
-
-/**
- * @param {Array<number>} arr
- * @return {ArrayBuffer}
- */
-export const createArrayBufferFromArray = arr => new Uint8Array_(arr).buffer
-
-export const createUint8ArrayFromLen = len => new Uint8Array_(len)
-
-/**
- * Create Uint8Array with initial content from buffer
- */
-export const createUint8ArrayFromBuffer = (buffer, byteOffset, length) => new Uint8Array_(buffer, byteOffset, length)
-
-/**
- * Create Uint8Array with initial content from buffer
- */
-export const createUint8ArrayFromArrayBuffer = arraybuffer => new Uint8Array_(arraybuffer)
-export const createArrayFromArrayBuffer = arraybuffer => Array.from(createUint8ArrayFromArrayBuffer(arraybuffer))
-
-export const createPromise = f => new Promise(f)
-
-export const createMap = () => new Map()
-export const createSet = () => new Set()
-
-/**
- * `Promise.all` wait for all promises in the array to resolve and return the result
- * @param {Array<Promise<any>>} arrp
- * @return {any}
- */
-export const pall = arrp => Promise.all(arrp)
-export const preject = reason => Promise.reject(reason)
-export const presolve = res => Promise.resolve(res)
-
-export const until = (timeout, check) => createPromise((resolve, reject) => {
-  const hasTimeout = timeout > 0
-  const untilInterval = () => {
-    if (check()) {
-      clearInterval(intervalHandle)
-      resolve()
-    } else if (hasTimeout) {
-      timeout -= 10
-      if (timeout < 0) {
-        clearInterval(intervalHandle)
-        reject(error('Timeout'))
-      }
-    }
-  }
-  const intervalHandle = setInterval(untilInterval, 10)
-})
-
-export const error = description => new Error(description)
-
-/**
- * @param {number} t Time to wait
- * @return {Promise} Promise that is resolved after t ms
- */
-export const wait = t => createPromise(r => setTimeout(r, t))

lib/idb.js

@@ -1,166 +0,0 @@
-/**
- * @module lib/idb
- */
-
-/* eslint-env browser */
-
-import * as globals from './globals.js'
-
-/*
- * IDB Request to Promise transformer
- */
-export const rtop = request => globals.createPromise((resolve, reject) => {
-  request.onerror = event => reject(new Error(event.target.error))
-  request.onblocked = () => location.reload()
-  request.onsuccess = event => resolve(event.target.result)
-})
-
-/**
- * @param {string} name
- * @param {Function} initDB Called when the database is first created
- * @return {Promise<IDBDatabase>}
- */
-export const openDB = (name, initDB) => globals.createPromise((resolve, reject) => {
-  let request = indexedDB.open(name)
-  /**
-   * @param {any} event
-   */
-  request.onupgradeneeded = event => initDB(event.target.result)
-  /**
-   * @param {any} event
-   */
-  request.onerror = event => reject(new Error(event.target.error))
-  request.onblocked = () => location.reload()
-  /**
-   * @param {any} event
-   */
-  request.onsuccess = event => {
-    const db = event.target.result
-    db.onversionchange = () => { db.close() }
-    addEventListener('unload', () => db.close())
-    resolve(db)
-  }
-})
-
-export const deleteDB = name => rtop(indexedDB.deleteDatabase(name))
-
-export const createStores = (db, definitions) => definitions.forEach(d =>
-  db.createObjectStore.apply(db, d)
-)
-
-/**
- * @param {IDBObjectStore} store
- * @param {String | number | ArrayBuffer | Date | Array } key
- * @return {Promise<ArrayBuffer>}
- */
-export const get = (store, key) =>
-  rtop(store.get(key))
-
-/**
- * @param {IDBObjectStore} store
- * @param {String | number | ArrayBuffer | Date | IDBKeyRange | Array } key
- */
-export const del = (store, key) =>
-  rtop(store.delete(key))
-
-/**
- * @param {IDBObjectStore} store
- * @param {String | number | ArrayBuffer | Date | boolean} item
- * @param {String | number | ArrayBuffer | Date | Array} [key]
- */
-export const put = (store, item, key) =>
-  rtop(store.put(item, key))
-
-/**
- * @param {IDBObjectStore} store
- * @param {String | number | ArrayBuffer | Date | boolean}  item
- * @param {String | number | ArrayBuffer | Date | Array}  [key]
- * @return {Promise<ArrayBuffer>}
- */
-export const add = (store, item, key) =>
-  rtop(store.add(item, key))
-
-/**
- * @param {IDBObjectStore} store
- * @param {String | number | ArrayBuffer | Date}  item
- * @return {Promise<number>}
- */
-export const addAutoKey = (store, item) =>
-  rtop(store.add(item))
-
-/**
- * @param {IDBObjectStore} store
- * @param {IDBKeyRange} [range]
- */
-export const getAll = (store, range) =>
-  rtop(store.getAll(range))
-
-/**
- * @param {IDBObjectStore} store
- * @param {IDBKeyRange} [range]
- */
-export const getAllKeys = (store, range) =>
-  rtop(store.getAllKeys(range))
-
-/**
- * @typedef KeyValuePair
- * @type {Object}
- * @property {any} k key
- * @property {any} v Value
- */
-
-/**
- * @param {IDBObjectStore} store
- * @param {IDBKeyRange} [range]
- * @return {Promise<Array<KeyValuePair>>}
- */
-export const getAllKeysValues = (store, range) =>
-  globals.pall([getAllKeys(store, range), getAll(store, range)]).then(([ks, vs]) => ks.map((k, i) => ({ k, v: vs[i] })))
-
-/**
- * Iterate on keys and values
- * @param {IDBObjectStore} store
- * @param {IDBKeyRange?} keyrange
- * @param {Function} f Return true in order to continue the cursor
- */
-export const iterate = (store, keyrange, f) => globals.createPromise((resolve, reject) => {
-  const request = store.openCursor(keyrange)
-  request.onerror = reject
-  /**
-   * @param {any} event
-   */
-  request.onsuccess = event => {
-    const cursor = event.target.result
-    if (cursor === null) {
-      return resolve()
-    }
-    f(cursor.value, cursor.key)
-    cursor.continue()
-  }
-})
-
-/**
- * Iterate on the keys (no values)
- *
- * @param {IDBObjectStore} store
- * @param {IDBKeyRange} keyrange
- * @param {function} f Call `idbcursor.continue()` to iterate further
- */
-export const iterateKeys = (store, keyrange, f) => {
-  /**
-   * @param {any} event
-   */
-  store.openKeyCursor(keyrange).onsuccess = event => f(event.target.result)
-}
-
-/**
- * Open store from transaction
- * @param {IDBTransaction} t
- * @param {String} store
- * @returns {IDBObjectStore}
- */
-export const getStore = (t, store) => t.objectStore(store)
-
-export const createIDBKeyRangeBound = (lower, upper, lowerOpen, upperOpen) => IDBKeyRange.bound(lower, upper, lowerOpen, upperOpen)
-export const createIDBKeyRangeUpperBound = (upper, upperOpen) => IDBKeyRange.upperBound(upper, upperOpen)
-export const createIDBKeyRangeLowerBound = (lower, lowerOpen) => IDBKeyRange.lowerBound(lower, lowerOpen)

lib/idb.test.js

@@ -1,34 +0,0 @@
-import * as test from './testing.js'
-import * as idb from './idb.js'
-import * as logging from './logging.js'
-
-const initTestDB = db => idb.createStores(db, [['test']])
-const testDBName = 'idb-test'
-
-const createTransaction = db => db.transaction(['test'], 'readwrite')
-/**
- * @param {IDBTransaction} t
- * @return {IDBObjectStore}
- */
-const getStore = t => idb.getStore(t, 'test')
-
-idb.deleteDB(testDBName).then(() => idb.openDB(testDBName, initTestDB)).then(db => {
-  test.run('idb iteration', async testname => {
-    const t = createTransaction(db)
-    await idb.put(getStore(t), 0, ['t', 0])
-    await idb.put(getStore(t), 1, ['t', 1])
-    const valsGetAll = await idb.getAll(getStore(t))
-    if (valsGetAll.length !== 2) {
-      logging.fail('getAll does not return two values')
-    }
-    const valsIterate = []
-    const keyrange = idb.createIDBKeyRangeBound(['t', 0], ['t', 1], false, false)
-    await idb.put(getStore(t), 2, ['t', 2])
-    await idb.iterate(getStore(t), keyrange, (val, key) => {
-      valsIterate.push(val)
-    })
-    if (valsIterate.length !== 2) {
-      logging.fail('iterate does not return two values')
-    }
-  })
-})

lib/logging.js

@@ -1,26 +0,0 @@
-/**
- * @module logging
- */
-
-import * as globals from './globals.js'
-
-let date = new Date().getTime()
-
-const writeDate = () => {
-  const oldDate = date
-  date = new Date().getTime()
-  return date - oldDate
-}
-
-export const print = (...args) => console.log(...args)
-export const log = m => print(`%cydb-client: %c${m} %c+${writeDate()}ms`, 'color: blue;', '', 'color: blue')
-
-export const fail = m => {
-  throw new Error(m)
-}
-
-/**
- * @param {ArrayBuffer} buffer
- * @return {string}
- */
-export const arrayBufferToString = buffer => JSON.stringify(Array.from(globals.createUint8ArrayFromBuffer(buffer)))

lib/math.js

@@ -1,28 +0,0 @@
-/**
- * @module math
- */
-export const floor = Math.floor
-
-/**
- * @function
- * @param {number} a
- * @param {number} b
- * @return {number} The sum of a and b
- */
-export const add = (a, b) => a + b
-
-/**
- * @function
- * @param {number} a
- * @param {number} b
- * @return {number} The smaller element of a and b
- */
-export const min = (a, b) => a < b ? a : b
-
-/**
- * @function
- * @param {number} a
- * @param {number} b
- * @return {number} The bigger element of a and b
- */
-export const max = (a, b) => a > b ? a : b

lib/mutex.js

@@ -1,31 +0,0 @@
-
-/**
- * Creates a mutual exclude function with the following property:
- *
- * @example
- * const mutex = createMutex()
- * mutex(() => {
- *   // This function is immediately executed
- *   mutex(() => {
- *     // This function is not executed, as the mutex is already active.
- *   })
- * })
- *
- * @return {Function} A mutual exclude function
- * @public
- */
-export const createMutex = () => {
-  let token = true
-  return (f, g) => {
-    if (token) {
-      token = false
-      try {
-        f()
-      } finally {
-        token = true
-      }
-    } else if (g !== undefined) {
-      g()
-    }
-  }
-}

lib/number.js

@@ -1,6 +0,0 @@
-/**
- * @module number
- */
-
-export const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER
-export const MIN_SAFE_INTEGER = Number.MIN_SAFE_INTEGER

lib/object.js

@@ -1,14 +0,0 @@
-
-export const create = Object.create(null)
-
-export const keys = Object.keys
-
-export const equalFlat = (a, b) => {
-  const keys = Object.keys(a)
-  let eq = keys.length === Object.keys(b).length
-  for (let i = 0; i < keys.length && eq; i++) {
-    const key = keys[i]
-    eq = a[key] === b[key]
-  }
-  return eq
-}

lib/prng/PRNG/Mt19937.js

@@ -1,67 +0,0 @@
-/**
- * @module prng
- */
-const N = 624
-const M = 397
-
-const twist = (u, v) => ((((u & 0x80000000) | (v & 0x7fffffff)) >>> 1) ^ ((v & 1) ? 0x9908b0df : 0))
-
-const nextState = (state) => {
-  let p = 0
-  let j
-  for (j = N - M + 1; --j; p++) {
-    state[p] = state[p + M] ^ twist(state[p], state[p + 1])
-  }
-  for (j = M; --j; p++) {
-    state[p] = state[p + M - N] ^ twist(state[p], state[p + 1])
-  }
-  state[p] = state[p + M - N] ^ twist(state[p], state[0])
-}
-
-/**
- * This is a port of Shawn Cokus's implementation of the original Mersenne Twister algorithm (http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/CODES/MTARCOK/mt19937ar-cok.c).
- * MT has a very high period of 2^19937. Though the authors of xorshift describe that a high period is not
- * very relevant (http://vigna.di.unimi.it/xorshift/). It is four times slower than xoroshiro128plus and
- * needs to recompute its state after generating 624 numbers.
- *
- * @example
- * const gen = new Mt19937(new Date().getTime())
- * console.log(gen.next())
- *
- * @public
- */
-export class Mt19937 {
-  /**
-   * @param {Number} seed The starting point for the random number generation. If you use the same seed, the generator will return the same sequence of random numbers.
-   */
-  constructor (seed) {
-    this.seed = seed
-    const state = new Uint32Array(N)
-    state[0] = seed
-    for (let i = 1; i < N; i++) {
-      state[i] = (Math.imul(1812433253, (state[i - 1] ^ (state[i - 1] >>> 30))) + i) & 0xFFFFFFFF
-    }
-    this._state = state
-    this._i = 0
-    nextState(this._state)
-  }
-
-  /**
-   * Generate a random signed integer.
-   *
-   * @return {Number} A 32 bit signed integer.
-   */
-  next () {
-    if (this._i === N) {
-      // need to compute a new state
-      nextState(this._state)
-      this._i = 0
-    }
-    let y = this._state[this._i++]
-    y ^= (y >>> 11)
-    y ^= (y << 7) & 0x9d2c5680
-    y ^= (y << 15) & 0xefc60000
-    y ^= (y >>> 18)
-    return y
-  }
-}

lib/prng/PRNG/PRNG.tests.js

@@ -1,51 +0,0 @@
-/**
- * @module prng
- */
-
-import { Mt19937 } from './Mt19937.js'
-import { Xoroshiro128plus } from './Xoroshiro128plus.js'
-import { Xorshift32 } from './Xorshift32.js'
-import * as time from '../../time.js'
-
-const DIAMETER = 300
-const NUMBERS = 10000
-
-const runPRNG = (name, Gen) => {
-  console.log('== ' + name + ' ==')
-  const gen = new Gen(1234)
-  let head = 0
-  let tails = 0
-  const date = time.getUnixTime()
-  const canvas = document.createElement('canvas')
-  canvas.height = DIAMETER
-  canvas.width = DIAMETER
-  const ctx = canvas.getContext('2d')
-  const vals = new Set()
-  ctx.fillStyle = 'blue'
-  for (let i = 0; i < NUMBERS; i++) {
-    const n = gen.next() & 0xFFFFFF
-    const x = (gen.next() >>> 0) % DIAMETER
-    const y = (gen.next() >>> 0) % DIAMETER
-    ctx.fillRect(x, y, 1, 2)
-    if ((n & 1) === 1) {
-      head++
-    } else {
-      tails++
-    }
-    if (vals.has(n)) {
-      console.warn(`The generator generated a duplicate`)
-    }
-    vals.add(n)
-  }
-  console.log('time: ', time.getUnixTime() - date)
-  console.log('head:', head, 'tails:', tails)
-  console.log('%c       ', `font-size: 200px; background: url(${canvas.toDataURL()}) no-repeat;`)
-  const h1 = document.createElement('h1')
-  h1.insertBefore(document.createTextNode(name), null)
-  document.body.insertBefore(h1, null)
-  document.body.appendChild(canvas)
-}
-
-runPRNG('mt19937', Mt19937)
-runPRNG('xoroshiro128plus', Xoroshiro128plus)
-runPRNG('xorshift32', Xorshift32)

lib/prng/PRNG/README.md

@@ -1,5 +0,0 @@
-# Pseudo Random Number Generators (PRNG)
-
-Given a seed a PRNG generates a sequence of numbers that cannot be reasonably predicted. Two PRNGs must generate the same random sequence of numbers if  given the same seed.
-
-TODO: explain what POINT is

lib/prng/PRNG/Xoroshiro128plus.js

@@ -1,101 +0,0 @@
-/**
- * @module prng
- */
-
-import { Xorshift32 } from './Xorshift32.js'
-
-/**
- * This is a variant of xoroshiro128plus - the fastest full-period generator passing BigCrush without systematic failures.
- *
- * This implementation follows the idea of the original xoroshiro128plus implementation,
- * but is optimized for the JavaScript runtime. I.e.
- * * The operations are performed on 32bit integers (the original implementation works with 64bit values).
- * * The initial 128bit state is computed based on a 32bit seed and Xorshift32.
- * * This implementation returns two 32bit values based on the 64bit value that is computed by xoroshiro128plus.
- *   Caution: The last addition step works slightly different than in the original implementation - the add carry of the
- *   first 32bit addition is not carried over to the last 32bit.
- *
- * [Reference implementation](http://vigna.di.unimi.it/xorshift/xoroshiro128plus.c)
- */
-export class Xoroshiro128plus {
-  constructor (seed) {
-    this.seed = seed
-    // This is a variant of Xoroshiro128plus to fill the initial state
-    const xorshift32 = new Xorshift32(seed)
-    this.state = new Uint32Array(4)
-    for (let i = 0; i < 4; i++) {
-      this.state[i] = xorshift32.next()
-    }
-    this._fresh = true
-  }
-  next () {
-    const state = this.state
-    if (this._fresh) {
-      this._fresh = false
-      return (state[0] + state[2]) & 0xFFFFFFFF
-    } else {
-      this._fresh = true
-      const s0 = state[0]
-      const s1 = state[1]
-      const s2 = state[2] ^ s0
-      const s3 = state[3] ^ s1
-      // function js_rotl (x, k) {
-      //   k = k - 32
-      //   const x1 = x[0]
-      //   const x2 = x[1]
-      //   x[0] = x2 << k | x1 >>> (32 - k)
-      //   x[1] = x1 << k | x2 >>> (32 - k)
-      // }
-      // rotl(s0, 55) // k = 23 = 55 - 32; j = 9 =  32 - 23
-      state[0] = (s1 << 23 | s0 >>> 9) ^ s2 ^ (s2 << 14 | s3 >>> 18)
-      state[1] = (s0 << 23 | s1 >>> 9) ^ s3 ^ (s3 << 14)
-      // rol(s1, 36) // k = 4 = 36 - 32; j = 23 = 32 - 9
-      state[2] = s3 << 4 | s2 >>> 28
-      state[3] = s2 << 4 | s3 >>> 28
-      return (state[1] + state[3]) & 0xFFFFFFFF
-    }
-  }
-}
-
-/*
-
-// reference implementation
-#include <stdint.h>
-#include <stdio.h>
-
-uint64_t s[2];
-
-static inline uint64_t rotl(const uint64_t x, int k) {
-    return (x << k) | (x >> (64 - k));
-}
-
-uint64_t next(void) {
-    const uint64_t s0 = s[0];
-    uint64_t s1 = s[1];
-    s1 ^= s0;
-    s[0] = rotl(s0, 55) ^ s1 ^ (s1 << 14); // a, b
-    s[1] = rotl(s1, 36); // c
-    return (s[0] + s[1]) & 0xFFFFFFFF;
-}
-
-int main(void)
-{
-    int i;
-    s[0] = 1111 | (1337ul << 32);
-    s[1] = 1234 | (9999ul << 32);
-
-    printf("1000 outputs of genrand_int31()\n");
-    for (i=0; i<100; i++) {
-        printf("%10lu ", i);
-        printf("%10lu ", next());
-        printf("- %10lu ", s[0] >> 32);
-        printf("%10lu ", (s[0] << 32) >> 32);
-        printf("%10lu ", s[1] >> 32);
-        printf("%10lu ", (s[1] << 32) >> 32);
-        printf("\n");
-        // if (i%5==4) printf("\n");
-    }
-    return 0;
-}
-
-*/

lib/prng/PRNG/Xorshift32.js

@@ -1,29 +0,0 @@
-/**
- * @module prng
- */
-
-/**
- * Xorshift32 is a very simple but elegang PRNG with a period of `2^32-1`.
- */
-export class Xorshift32 {
-  /**
-   * @param {number} seed The starting point for the random number generation. If you use the same seed, the generator will return the same sequence of random numbers.
-   */
-  constructor (seed) {
-    this.seed = seed
-    this._state = seed
-  }
-  /**
-   * Generate a random signed integer.
-   *
-   * @return {Number} A 32 bit signed integer.
-   */
-  next () {
-    let x = this._state
-    x ^= x << 13
-    x ^= x >> 17
-    x ^= x << 5
-    this._state = x
-    return x
-  }
-}

lib/prng/prng.js

@@ -1,134 +0,0 @@
-/**
- * @module prng
- */
-
-import * as binary from '../binary.js'
-import { fromCharCode, fromCodePoint } from '../string.js'
-import { MAX_SAFE_INTEGER, MIN_SAFE_INTEGER } from '../number.js'
-import * as math from '../math.js'
-
-import { Xoroshiro128plus as DefaultPRNG } from './PRNG/Xoroshiro128plus.js'
-
-/**
- * Description of the function
- *  @callback generatorNext
- *  @return {number} A 32bit integer
- */
-
-/**
- * A random type generator.
- *
- * @typedef {Object} PRNG
- * @property {generatorNext} next Generate new number
- */
-
-/**
- * Create a Xoroshiro128plus Pseudo-Random-Number-Generator.
- * This is the fastest full-period generator passing BigCrush without systematic failures.
- * But there are more PRNGs available in ./PRNG/.
- *
- * @param {number} seed A positive 32bit integer. Do not use negative numbers.
- * @return {PRNG}
- */
-export const createPRNG = seed => new DefaultPRNG(Math.floor(seed < 1 ? seed * binary.BITS32 : seed))
-
-/**
- * Generates a single random bool.
- *
- * @param {PRNG} gen A random number generator.
- * @return {Boolean} A random boolean
- */
-export const bool = gen => (gen.next() & 2) === 2 // brackets are non-optional!
-
-/**
- * Generates a random integer with 53 bit resolution.
- *
- * @param {PRNG} gen A random number generator.
- * @param {Number} [min = MIN_SAFE_INTEGER] The lower bound of the allowed return values (inclusive).
- * @param {Number} [max = MAX_SAFE_INTEGER] The upper bound of the allowed return values (inclusive).
- * @return {Number} A random integer on [min, max]
- */
-export const int53 = (gen, min = MIN_SAFE_INTEGER, max = MAX_SAFE_INTEGER) => math.floor(real53(gen) * (max + 1 - min) + min)
-
-/**
- * Generates a random integer with 32 bit resolution.
- *
- * @param {PRNG} gen A random number generator.
- * @param {Number} [min = MIN_SAFE_INTEGER] The lower bound of the allowed return values (inclusive).
- * @param {Number} [max = MAX_SAFE_INTEGER] The upper bound of the allowed return values (inclusive).
- * @return {Number} A random integer on [min, max]
- */
-export const int32 = (gen, min = MIN_SAFE_INTEGER, max = MAX_SAFE_INTEGER) => min + ((gen.next() >>> 0) % (max + 1 - min))
-
-/**
- * Generates a random real on [0, 1) with 32 bit resolution.
- *
- * @param {PRNG} gen A random number generator.
- * @return {Number} A random real number on [0, 1).
- */
-export const real32 = gen => (gen.next() >>> 0) / binary.BITS32
-
-/**
- * Generates a random real on [0, 1) with 53 bit resolution.
- *
- * @param {PRNG} gen A random number generator.
- * @return {Number} A random real number on [0, 1).
- */
-export const real53 = gen => (((gen.next() >>> 5) * binary.BIT26) + (gen.next() >>> 6)) / MAX_SAFE_INTEGER
-
-/**
- * Generates a random character from char code 32 - 126. I.e. Characters, Numbers, special characters, and Space:
- *
- * (Space)!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[/]^_`abcdefghijklmnopqrstuvwxyz{|}~
- */
-export const char = gen => fromCharCode(int32(gen, 32, 126))
-
-/**
- * @param {PRNG} gen
- * @return {string} A single letter (a-z)
- */
-export const letter = gen => fromCharCode(int32(gen, 97, 122))
-
-/**
- * @param {PRNG} gen
- * @return {string} A random word without spaces consisting of letters (a-z)
- */
-export const word = gen => {
-  const len = int32(gen, 0, 20)
-  let str = ''
-  for (let i = 0; i < len; i++) {
-    str += letter(gen)
-  }
-  return str
-}
-
-/**
- * TODO: this function produces invalid runes. Does not cover all of utf16!!
- */
-export const utf16Rune = gen => {
-  const codepoint = int32(gen, 0, 256)
-  return fromCodePoint(codepoint)
-}
-
-/**
- * @param {PRNG} gen
- * @param {number} [maxlen = 20]
- */
-export const utf16String = (gen, maxlen = 20) => {
-  const len = int32(gen, 0, maxlen)
-  let str = ''
-  for (let i = 0; i < len; i++) {
-    str += utf16Rune(gen)
-  }
-  return str
-}
-
-/**
- * Returns one element of a given array.
- *
- * @param {PRNG} gen A random number generator.
- * @param {Array<T>} array Non empty Array of possible values.
- * @return {T} One of the values of the supplied Array.
- * @template T
- */
-export const oneOf = (gen, array) => array[int32(gen, 0, array.length - 1)]

lib/prng/prng.test.js

@@ -1,114 +0,0 @@
-/**
- * @module prng
- */
-
-/**
- *TODO: enable tests
-import * as rt from '../rich-text/formatters.js''
-import { test } from '../test/test.js''
-import Xoroshiro128plus from './PRNG/Xoroshiro128plus.js''
-import Xorshift32 from './PRNG/Xorshift32.js''
-import MT19937 from './PRNG/Mt19937.js''
-import { generateBool, generateInt, generateInt32, generateReal, generateChar } from './random.js''
-import { MAX_SAFE_INTEGER } from '../number/constants.js''
-import { BIT32 } from '../binary/constants.js''
-
-function init (Gen) {
-  return {
-    gen: new Gen(1234)
-  }
-}
-
-const PRNGs = [
-  { name: 'Xoroshiro128plus', Gen: Xoroshiro128plus },
-  { name: 'Xorshift32', Gen: Xorshift32 },
-  { name: 'MT19937', Gen: MT19937 }
-]
-
-const ITERATONS = 1000000
-
-for (const PRNG of PRNGs) {
-  const prefix = rt.orange`${PRNG.name}:`
-
-  test(rt.plain`${prefix} generateBool`, function generateBoolTest (t) {
-    const { gen } = init(PRNG.Gen)
-    let head = 0
-    let tail = 0
-    let b
-    let i
-
-    for (i = 0; i < ITERATONS; i++) {
-      b = generateBool(gen)
-      if (b) {
-        head++
-      } else {
-        tail++
-      }
-    }
-    t.log(`Generated ${head} heads and ${tail} tails.`)
-    t.assert(tail >= Math.floor(ITERATONS * 0.49), 'Generated enough tails.')
-    t.assert(head >= Math.floor(ITERATONS * 0.49), 'Generated enough heads.')
-  })
-
-  test(rt.plain`${prefix} generateInt integers average correctly`, function averageIntTest (t) {
-    const { gen } = init(PRNG.Gen)
-    let count = 0
-    let i
-
-    for (i = 0; i < ITERATONS; i++) {
-      count += generateInt(gen, 0, 100)
-    }
-    const average = count / ITERATONS
-    const expectedAverage = 100 / 2
-    t.log(`Average is: ${average}. Expected average is ${expectedAverage}.`)
-    t.assert(Math.abs(average - expectedAverage) <= 1, 'Expected average is at most 1 off.')
-  })
-
-  test(rt.plain`${prefix} generateInt32 generates integer with 32 bits`, function generateLargeIntegers (t) {
-    const { gen } = init(PRNG.Gen)
-    let num = 0
-    let i
-    let newNum
-    for (i = 0; i < ITERATONS; i++) {
-      newNum = generateInt32(gen, 0, MAX_SAFE_INTEGER)
-      if (newNum > num) {
-        num = newNum
-      }
-    }
-    t.log(`Largest number generated is ${num} (0b${num.toString(2)})`)
-    t.assert(num > (BIT32 >>> 0), 'Largest number is 32 bits long.')
-  })
-
-  test(rt.plain`${prefix} generateReal has 53 bit resolution`, function real53bitResolution (t) {
-    const { gen } = init(PRNG.Gen)
-    let num = 0
-    let i
-    let newNum
-    for (i = 0; i < ITERATONS; i++) {
-      newNum = generateReal(gen) * MAX_SAFE_INTEGER
-      if (newNum > num) {
-        num = newNum
-      }
-    }
-    t.log(`Largest number generated is ${num}.`)
-    t.assert((MAX_SAFE_INTEGER - num) / MAX_SAFE_INTEGER < 0.01, 'Largest number is close to MAX_SAFE_INTEGER (at most 1% off).')
-  })
-
-  test(rt.plain`${prefix} generateChar generates all described characters`, function real53bitResolution (t) {
-    const { gen } = init(PRNG.Gen)
-    const charSet = new Set()
-    const chars = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[/]^_`abcdefghijklmnopqrstuvwxyz{|}~"'
-    let i
-    let char
-    for (i = chars.length - 1; i >= 0; i--) {
-      charSet.add(chars[i])
-    }
-    for (i = 0; i < ITERATONS; i++) {
-      char = generateChar(gen)
-      charSet.delete(char)
-    }
-    t.log(`Charactes missing: ${charSet.size} - generating all of "${chars}"`)
-    t.assert(charSet.size === 0, 'Generated all documented characters.')
-  })
-}
-*/

lib/random.js

@@ -1,3 +0,0 @@
-/**
- * @module random
- */

lib/string.js

@@ -1,6 +0,0 @@
-/**
- * @module string
- */
-
-export const fromCharCode = String.fromCharCode
-export const fromCodePoint = String.fromCodePoint

lib/testing.js

@@ -1,37 +0,0 @@
-/**
- * @module testing
- */
-
-import * as logging from './logging.js'
-import { simpleDiff } from './diff.js'
-
-export const run = async (name, f) => {
-  console.log(`%cStart:%c   ${name}`, 'color:blue;', '')
-  const start = new Date()
-  try {
-    await f(name)
-  } catch (e) {
-    logging.print(`%cFailure:%c ${name} in %c${new Date().getTime() - start.getTime()}ms`, 'color:red;font-weight:bold', '', 'color:grey')
-    throw e
-  }
-  logging.print(`%cSuccess:%c ${name} in %c${new Date().getTime() - start.getTime()}ms`, 'color:green;font-weight:bold', '', 'color:grey')
-}
-
-export const compareArrays = (as, bs) => {
-  if (as.length !== bs.length) {
-    return false
-  }
-  for (let i = 0; i < as.length; i++) {
-    if (as[i] !== bs[i]) {
-      return false
-    }
-  }
-  return true
-}
-
-export const compareStrings = (a, b) => {
-  if (a !== b) {
-    const diff = simpleDiff(a, b)
-    logging.print(`%c${a.slice(0, diff.pos)}%c${a.slice(diff.pos, diff.remove)}%c${diff.insert}%c${a.slice(diff.pos + diff.remove)}`, 'color:grey', 'color:red', 'color:green', 'color:grey')
-  }
-}

lib/time.js

@@ -1,3 +0,0 @@
-
-export const getDate = () => new Date()
-export const getUnixTime = () => getDate().getTime()

package.json

@@ -1,107 +1,107 @@
 {
   "name": "yjs",
-  "version": "13.0.0-78",
-  "description": "A ",
-  "main": "./build/yjs.js",
-  "module": "./index.js'",
+  "version": "13.6.24",
+  "description": "Shared Editing Library",
+  "main": "./dist/yjs.cjs",
+  "module": "./dist/yjs.mjs",
+  "types": "./dist/src/index.d.ts",
+  "type": "module",
   "sideEffects": false,
+  "funding": {
+    "type": "GitHub Sponsors ❤",
+    "url": "https://github.com/sponsors/dmonad"
+  },
   "scripts": {
-    "test": "npm run lint",
-    "build": "rm -rf build examples/build && PRODUCTION=1 rollup -c",
+    "clean": "rm -rf dist docs",
+    "test": "NODE_ENV=development node ./tests/index.js --repetition-time 50",
+    "test-extensive": "node ./tests/index.js --production --repetition-time 10000",
+    "dist": "npm run clean && rollup -c && tsc",
     "watch": "rollup -wc",
-    "debug": "concurrently 'npm run watch' 'cutest-serve build/y.test.js -o'",
-    "lint": "standard **/*.js",
-    "docs": "rm -rf docs; jsdoc --configure ./.jsdoc.json --verbose --readme ./README.v13.md --package ./package.json || true",
-    "serve-docs": "npm run docs && serve ./docs/",
-    "postversion": "npm run build",
-    "websocket-server": "node ./provider/websocket/server.js",
-    "now-start": "npm run websocket-server"
+    "lint": "markdownlint README.md && standard && tsc",
+    "docs": "rm -rf docs; jsdoc --configure ./.jsdoc.json --verbose --readme ./README.md --package ./package.json || true",
+    "serve-docs": "npm run docs && 0serve ./docs/",
+    "preversion": "npm run lint && PRODUCTION=1 npm run dist && npm run docs && node ./tests/index.js --repetition-time 1000 && test -e dist/src/index.d.ts && test -e dist/yjs.cjs && test -e dist/yjs.cjs",
+    "debug": "npm run gentesthtml && 0serve -o test.html",
+    "trace-deopt": "clear && node --trace-deopt ./tests/index.js",
+    "trace-opt": "clear && node --trace-opt ./tests/index.js",
+    "gentesthtml": "0gentesthtml --script ./tests/index.js > test.html"
+  },
+  "exports": {
+    ".": {
+      "types": "./dist/src/index.d.ts",
+      "module": "./dist/yjs.mjs",
+      "require": "./dist/yjs.cjs",
+      "import": "./src/index.js"
+    },
+    "./internals": {
+      "types": "./dist/src/internals.d.ts",
+      "module": "./dist/internals.mjs",
+      "require": "./dist/internals.cjs",
+      "import": "./src/internals.js"
+    },
+    "./testHelper": {
+      "types": "./dist/testHelper.d.ts",
+      "module": "./dist/testHelper.mjs",
+      "require": "./dist/testHelper.cjs",
+      "import": "./tests/testHelper.js"
+    },
+    "./package.json": "./package.json"
   },
   "files": [
-    "build/*",
-    "bindings/*",
-    "docs/*",
-    "examples/*",
-    "lib/*",
-    "persistences/*",
-    "protocols/*",
-    "provider/*",
-    "bindings/*",
-    "structs/*",
-    "tests/*",
-    "types/*",
-    "utils/*",
-    "index.js",
-    "README.md",
-    "LICENSE"
+    "dist/yjs.*",
+    "dist/src",
+    "src",
+    "tests/testHelper.js",
+    "dist/testHelper.mjs",
+    "sponsor-y.js"
   ],
   "dictionaries": {
-    "doc": "docs",
-    "example": "examples",
-    "test": "tests",
-    "lib": "./"
-  },
-  "bin": {
-    "y-websocket-server": "provider/websocket/server.js"
+    "test": "tests"
   },
   "standard": {
     "ignore": [
-      "/build",
+      "/dist",
       "/node_modules",
-      "/rollup.test.js",
-      "/rollup.test.js"
+      "/docs"
     ]
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/y-js/yjs.git"
+    "url": "https://github.com/yjs/yjs.git"
   },
   "keywords": [
-    "crdt"
+    "Yjs",
+    "CRDT",
+    "offline",
+    "offline-first",
+    "shared-editing",
+    "concurrency",
+    "collaboration"
   ],
   "author": "Kevin Jahns",
-  "email": "kevin.jahns@rwth-aachen.de",
+  "email": "kevin.jahns@protonmail.com",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/y-js/yjs/issues"
+    "url": "https://github.com/yjs/yjs/issues"
+  },
+  "homepage": "https://docs.yjs.dev",
+  "dependencies": {
+    "lib0": "^0.2.101",
+    "y-protocols": "^1.0.5"
   },
-  "homepage": "http://y-js.org",
   "devDependencies": {
-    "@types/ws": "^6.0.1",
-    "babel-cli": "^6.26.0",
-    "babel-plugin-external-helpers": "^6.22.0",
-    "babel-plugin-transform-regenerator": "^6.26.0",
-    "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-latest": "^6.24.1",
+    "@types/node": "^18.15.5",
     "concurrently": "^3.6.1",
-    "cutest": "^0.1.9",
-    "esdoc": "^1.1.0",
-    "esdoc-standard-plugin": "^1.0.0",
-    "jsdoc": "^3.5.5",
-    "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": "^0.58.2",
-    "rollup-cli": "^1.0.9",
-    "rollup-plugin-babel": "^2.7.1",
-    "rollup-plugin-commonjs": "^8.4.1",
-    "rollup-plugin-inject": "^2.2.0",
-    "rollup-plugin-multi-entry": "^2.0.2",
-    "rollup-plugin-node-resolve": "^3.4.0",
-    "rollup-plugin-uglify": "^6.0.0",
-    "rollup-plugin-uglify-es": "0.0.1",
-    "rollup-regenerator-runtime": "^6.23.1",
-    "rollup-watch": "^3.2.2",
-    "standard": "^11.0.1",
+    "jsdoc": "^3.6.7",
+    "markdownlint-cli": "^0.41.0",
+    "rollup": "^4.37.0",
+    "standard": "^16.0.4",
     "tui-jsdoc-template": "^1.2.2",
-    "codemirror": "^5.42.0",
-    "crel": "^3.1.0"
+    "typescript": "^4.9.5",
+    "yjs": "."
   },
-  "optionalDependencies": {
-    "level": "^4.0.0",
-    "ws": "^6.1.0"
+  "engines": {
+    "npm": ">=8.0.0",
+    "node": ">=16.0.0"
   }
 }

persistence/FilePersistence.js

@@ -1,74 +0,0 @@
-/*
-import fs from 'fs'
-import path from 'path'
-import * as encoding from '../lib/encoding.js'
-import * as decoding from '../lib/decoding.js'
-import { createMutex } from '../lib/mutex.js'
-import { encodeUpdate, encodeStructsDS, decodePersisted } from './decodePersisted.js'
-
-function createFilePath (persistence, roomName) {
-  // TODO: filename checking!
-  return path.join(persistence.dir, roomName)
-}
-
-export class FilePersistence {
-  constructor (dir) {
-    this.dir = dir
-    this._mutex = createMutex()
-  }
-  setRemoteUpdateCounter (roomName, remoteUpdateCounter) {
-    // TODO: implement
-    // nop
-  }
-  saveUpdate (room, y, encodedStructs) {
-    return new Promise((resolve, reject) => {
-      this._mutex(() => {
-        const filePath = createFilePath(this, room)
-        const updateMessage = encoding.createEncoder()
-        encodeUpdate(y, encodedStructs, updateMessage)
-        fs.appendFile(filePath, Buffer.from(encoding.toBuffer(updateMessage)), (err) => {
-          if (err !== null) {
-            reject(err)
-          } else {
-            resolve()
-          }
-        })
-      }, resolve)
-    })
-  }
-  saveState (roomName, y) {
-    return new Promise((resolve, reject) => {
-      const encoder = encoding.createEncoder()
-      encodeStructsDS(y, encoder)
-      const filePath = createFilePath(this, roomName)
-      fs.writeFile(filePath, Buffer.from(encoding.toBuffer(encoder)), (err) => {
-        if (err !== null) {
-          reject(err)
-        } else {
-          resolve()
-        }
-      })
-    })
-  }
-  readState (roomName, y) {
-    // Check if the file exists in the current directory.
-    return new Promise((resolve, reject) => {
-      const filePath = path.join(this.dir, roomName)
-      fs.readFile(filePath, (err, data) => {
-        if (err !== null) {
-          resolve()
-          // reject(err)
-        } else {
-          this._mutex(() => {
-            console.info(`unpacking data (${data.length})`)
-            console.time('unpacking')
-            decodePersisted(y, decoding.createDecoder(data.buffer))
-            console.timeEnd('unpacking')
-          })
-          resolve()
-        }
-      })
-    })
-  }
-}
-*/

persistence/IndexedDBPersistence.js

@@ -1,553 +0,0 @@
-/*
-import { Y } from '../utils/Y.js'
-import { createMutex } from '../lib/mutex.js'
-import { decodePersisted, encodeStructsDS, encodeUpdate, PERSIST_STRUCTS_DS, PERSIST_UPDATE } from './decodePersisted.js'
-
-function rtop (request) {
-  return new Promise(function (resolve, reject) {
-    request.onerror = function (event) {
-      reject(new Error(event.target.error))
-    }
-    request.onblocked = function () {
-      location.reload()
-    }
-    request.onsuccess = function (event) {
-      resolve(event.target.result)
-    }
-  })
-}
-
-function openDB (room) {
-  return new Promise(function (resolve, reject) {
-    let request = indexedDB.open(room)
-    request.onupgradeneeded = function (event) {
-      const db = event.target.result
-      if (db.objectStoreNames.contains('updates')) {
-        db.deleteObjectStore('updates')
-      }
-      db.createObjectStore('updates', {autoIncrement: true})
-    }
-    request.onerror = function (event) {
-      reject(new Error(event.target.error))
-    }
-    request.onblocked = function () {
-      location.reload()
-    }
-    request.onsuccess = function (event) {
-      const db = event.target.result
-      db.onversionchange = function () { db.close() }
-      resolve(db)
-    }
-  })
-}
-
-function persist (room) {
-  let t = room.db.transaction(['updates'], 'readwrite')
-  let updatesStore = t.objectStore('updates')
-  return rtop(updatesStore.getAll())
-    .then(updates => {
-      // apply all previous updates before deleting them
-      room.mutex(() => {
-        updates.forEach(update => {
-          decodePersisted(y, new BinaryDecoder(update))
-        })
-      })
-      const encoder = new BinaryEncoder()
-      encodeStructsDS(y, encoder)
-      // delete all pending updates
-      rtop(updatesStore.clear()).then(() => {
-        // write current model
-        updatesStore.put(encoder.createBuffer())
-      })
-    })
-}
-
-function saveUpdate (room, updateBuffer) {
-  const db = room.db
-  if (db !== null) {
-    const t = db.transaction(['updates'], 'readwrite')
-    const updatesStore = t.objectStore('updates')
-    const updatePut = rtop(updatesStore.put(updateBuffer))
-    rtop(updatesStore.count()).then(cnt => {
-      if (cnt >= PREFERRED_TRIM_SIZE) {
-        persist(room)
-      }
-    })
-    return updatePut
-  }
-}
-
-function registerRoomInPersistence (documentsDB, roomName) {
-  return documentsDB.then(
-    db => Promise.all([
-      db,
-      rtop(db.transaction(['documents'], 'readonly').objectStore('documents').get(roomName))
-    ])
-  ).then(
-    ([db, doc]) => {
-      if (doc === undefined) {
-        return rtop(db.transaction(['documents'], 'readwrite').objectStore('documents').add({ roomName, serverUpdateCounter: 0 }))
-      }
-    }
-  )
-}
-
-const PREFERRED_TRIM_SIZE = 400
-
-export class IndexedDBPersistence {
-  constructor () {
-    this._rooms = new Map()
-    this._documentsDB = new Promise(function (resolve, reject) {
-      let request = indexedDB.open('_yjs_documents')
-      request.onupgradeneeded = function (event) {
-        const db = event.target.result
-        if (db.objectStoreNames.contains('documents')) {
-          db.deleteObjectStore('documents')
-        }
-        db.createObjectStore('documents', { keyPath: "roomName" })
-      }
-      request.onerror = function (event) {
-        reject(new Error(event.target.error))
-      }
-      request.onblocked = function () {
-        location.reload()
-      }
-      request.onsuccess = function (event) {
-        const db = event.target.result
-        db.onversionchange = function () { db.close() }
-        resolve(db)
-      }
-    })
-    addEventListener('unload', () => {
-      // close everything when page unloads
-      this._rooms.forEach(room => {
-        if (room.db !== null) {
-          room.db.close()
-        } else {
-          room.dbPromise.then(db => db.close())
-        }
-      })
-      this._documentsDB.then(db => db.close())
-    })
-  }
-  getAllDocuments () {
-    return this._documentsDB.then(
-      db => rtop(db.transaction(['documents'], 'readonly').objectStore('documents').getAll())
-    )
-  }
-  setRemoteUpdateCounter (roomName, remoteUpdateCounter) {
-    this._documentsDB.then(
-      db => rtop(db.transaction(['documents'], 'readwrite').objectStore('documents').put({ roomName, remoteUpdateCounter }))
-    )
-  }
-
-  _createYInstance (roomName) {
-    const room = this._rooms.get(roomName)
-    if (room !== undefined) {
-      return room.y
-    }
-    const y = new Y()
-    return openDB(roomName).then(
-      db => rtop(db.transaction(['updates'], 'readonly').objectStore('updates').getAll())
-    ).then(
-      updates =>
-        y.transact(() => {
-          updates.forEach(update => {
-            decodePersisted(y, new BinaryDecoder(update))
-          })
-        }, true)
-    ).then(() => Promise.resolve(y))
-  }
-
-  _persistStructsDS (roomName, structsDS) {
-    const encoder = new BinaryEncoder()
-    encoder.writeVarUint(PERSIST_STRUCTS_DS)
-    encoder.writeArrayBuffer(structsDS)
-    return openDB(roomName).then(db => {
-      const t = db.transaction(['updates'], 'readwrite')
-      const updatesStore = t.objectStore('updates')
-      return rtop(updatesStore.put(encoder.createBuffer()))
-    })
-  }
-
-  _persistStructs (roomName, structs) {
-    const encoder = new BinaryEncoder()
-    encoder.writeVarUint(PERSIST_UPDATE)
-    encoder.writeArrayBuffer(structs)
-    return openDB(roomName).then(db => {
-      const t = db.transaction(['updates'], 'readwrite')
-      const updatesStore = t.objectStore('updates')
-      return rtop(updatesStore.put(encoder.createBuffer()))
-    })
-  }
-
-  connectY (roomName, y) {
-    if (this._rooms.has(roomName)) {
-      throw new Error('A Y instance is already bound to this room!')
-    }
-    let room = {
-      db: null,
-      dbPromise: null,
-      channel: null,
-      mutex: createMutex(),
-      y
-    }
-    if (typeof BroadcastChannel !== 'undefined') {
-      room.channel = new BroadcastChannel('__yjs__' + roomName)
-      room.channel.addEventListener('message', e => {
-        room.mutex(function () {
-          decodePersisted(y, new BinaryDecoder(e.data))
-        })
-      })
-    }
-    y.on('destroyed', () => {
-      this.disconnectY(roomName, y)
-    })
-    y.on('afterTransaction', (y, transaction) => {
-      room.mutex(() => {
-        if (transaction.encodedStructsLen > 0) {
-          const encoder = new BinaryEncoder()
-          const update = new BinaryEncoder()
-          encodeUpdate(y, transaction.encodedStructs, update)
-          const updateBuffer = update.createBuffer()
-          if (room.channel !== null) {
-            room.channel.postMessage(updateBuffer)
-          }
-          if (transaction.encodedStructsLen > 0
-            import { Y } from '../utils/Y.js'
-            import { createMutex } from '../lib/mutex.js'
-            import { decodePersisted, encodeStructsDS, encodeUpdate, PERSIST_STRUCTS_DS, PERSIST_UPDATE } from './decodePersisted.js'
-
-            function rtop (request) {
-              return new Promise(function (resolve, reject) {
-                request.onerror = function (event) {
-                  reject(new Error(event.target.error))
-                }
-                request.onblocked = function () {
-                  location.reload()
-                }
-                request.onsuccess = function (event) {
-                  resolve(event.target.result)
-                }
-              })
-            }
-
-            function openDB (room) {
-              return new Promise(function (resolve, reject) {
-                let request = indexedDB.open(room)
-                request.onupgradeneeded = function (event) {
-                  const db = event.target.result
-                  if (db.objectStoreNames.contains('updates')) {
-                    db.deleteObjectStore('updates')
-                  }
-                  db.createObjectStore('updates', {autoIncrement: true})
-                }
-                request.onerror = function (event) {
-                  reject(new Error(event.target.error))
-                }
-                request.onblocked = function () {
-                  location.reload()
-                }
-                request.onsuccess = function (event) {
-                  const db = event.target.result
-                  db.onversionchange = function () { db.close() }
-                  resolve(db)
-                }
-              })
-            }
-
-            function persist (room) {
-              let t = room.db.transaction(['updates'], 'readwrite')
-              let updatesStore = t.objectStore('updates')
-              return rtop(updatesStore.getAll())
-                .then(updates => {
-                  // apply all previous updates before deleting them
-                  room.mutex(() => {
-                    updates.forEach(update => {
-                      decodePersisted(y, new BinaryDecoder(update))
-                    })
-                  })
-                  const encoder = new BinaryEncoder()
-                  encodeStructsDS(y, encoder)
-                  // delete all pending updates
-                  rtop(updatesStore.clear()).then(() => {
-                    // write current model
-                    updatesStore.put(encoder.createBuffer())
-                  })
-                })
-            }
-
-            function saveUpdate (room, updateBuffer) {
-              const db = room.db
-              if (db !== null) {
-                const t = db.transaction(['updates'], 'readwrite')
-                const updatesStore = t.objectStore('updates')
-                const updatePut = rtop(updatesStore.put(updateBuffer))
-                rtop(updatesStore.count()).then(cnt => {
-                  if (cnt >= PREFERRED_TRIM_SIZE) {
-                    persist(room)
-                  }
-                })
-                return updatePut
-              }
-            }
-
-            function registerRoomInPersistence (documentsDB, roomName) {
-              return documentsDB.then(
-                db => Promise.all([
-                  db,
-                  rtop(db.transaction(['documents'], 'readonly').objectStore('documents').get(roomName))
-                ])
-              ).then(
-                ([db, doc]) => {
-                  if (doc === undefined) {
-                    return rtop(db.transaction(['documents'], 'readwrite').objectStore('documents').add({ roomName, serverUpdateCounter: 0 }))
-                  }
-                }
-              )
-            }
-
-            const PREFERRED_TRIM_SIZE = 400
-
-            export class IndexedDBPersistence {
-              constructor () {
-                this._rooms = new Map()
-                this._documentsDB = new Promise(function (resolve, reject) {
-                  let request = indexedDB.open('_yjs_documents')
-                  request.onupgradeneeded = function (event) {
-                    const db = event.target.result
-                    if (db.objectStoreNames.contains('documents')) {
-                      db.deleteObjectStore('documents')
-                    }
-                    db.createObjectStore('documents', { keyPath: "roomName" })
-                  }
-                  request.onerror = function (event) {
-                    reject(new Error(event.target.error))
-                  }
-                  request.onblocked = function () {
-                    location.reload()
-                  }
-                  request.onsuccess = function (event) {
-                    const db = event.target.result
-                    db.onversionchange = function () { db.close() }
-                    resolve(db)
-                  }
-                })
-                addEventListener('unload', () => {
-                  // close everything when page unloads
-                  this._rooms.forEach(room => {
-                    if (room.db !== null) {
-                      room.db.close()
-                    } else {
-                      room.dbPromise.then(db => db.close())
-                    }
-                  })
-                  this._documentsDB.then(db => db.close())
-                })
-              }
-              getAllDocuments () {
-                return this._documentsDB.then(
-                  db => rtop(db.transaction(['documents'], 'readonly').objectStore('documents').getAll())
-                )
-              }
-              setRemoteUpdateCounter (roomName, remoteUpdateCounter) {
-                this._documentsDB.then(
-                  db => rtop(db.transaction(['documents'], 'readwrite').objectStore('documents').put({ roomName, remoteUpdateCounter }))
-                )
-              }
-
-              _createYInstance (roomName) {
-                const room = this._rooms.get(roomName)
-                if (room !== undefined) {
-                  return room.y
-                }
-                const y = new Y()
-                return openDB(roomName).then(
-                  db => rtop(db.transaction(['updates'], 'readonly').objectStore('updates').getAll())
-                ).then(
-                  updates =>
-                    y.transact(() => {
-                      updates.forEach(update => {
-                        decodePersisted(y, new BinaryDecoder(update))
-                      })
-                    }, true)
-                ).then(() => Promise.resolve(y))
-              }
-
-              _persistStructsDS (roomName, structsDS) {
-                const encoder = new BinaryEncoder()
-                encoder.writeVarUint(PERSIST_STRUCTS_DS)
-                encoder.writeArrayBuffer(structsDS)
-                return openDB(roomName).then(db => {
-                  const t = db.transaction(['updates'], 'readwrite')
-                  const updatesStore = t.objectStore('updates')
-                  return rtop(updatesStore.put(encoder.createBuffer()))
-                })
-              }
-
-              _persistStructs (roomName, structs) {
-                const encoder = new BinaryEncoder()
-                encoder.writeVarUint(PERSIST_UPDATE)
-                encoder.writeArrayBuffer(structs)
-                return openDB(roomName).then(db => {
-                  const t = db.transaction(['updates'], 'readwrite')
-                  const updatesStore = t.objectStore('updates')
-                  return rtop(updatesStore.put(encoder.createBuffer()))
-                })
-              }
-
-              connectY (roomName, y) {
-                if (this._rooms.has(roomName)) {
-                  throw new Error('A Y instance is already bound to this room!')
-                }
-                let room = {
-                  db: null,
-                  dbPromise: null,
-                  channel: null,
-                  mutex: createMutex(),
-                  y
-                }
-                if (typeof BroadcastChannel !== 'undefined') {
-                  room.channel = new BroadcastChannel('__yjs__' + roomName)
-                  room.channel.addEventListener('message', e => {
-                    room.mutex(function () {
-                      decodePersisted(y, new BinaryDecoder(e.data))
-                    })
-                  })
-                }
-                y.on('destroyed', () => {
-                  this.disconnectY(roomName, y)
-                })
-                y.on('afterTransaction', (y, transaction) => {
-                  room.mutex(() => {
-                    if (transaction.encodedStructsLen > 0) {
-                      const encoder = new BinaryEncoder()
-                      const update = new BinaryEncoder()
-                      encodeUpdate(y, transaction.encodedStructs, update)
-                      const updateBuffer = update.createBuffer()
-                      if (room.channel !== null) {
-                        room.channel.postMessage(updateBuffer)
-                      }
-                      if (transaction.encodedStructsLen > 0) {
-                        if (room.db !== null) {
-                          saveUpdate(room, updateBuffer)
-                        }
-                      }
-                    }
-                  })
-                })
-                // register document in documentsDB
-                this._documentsDB.then(
-                  db =>
-                    rtop(db.transaction(['documents'], 'readonly').objectStore('documents').get(roomName))
-                      .then(
-                        doc => doc === undefined && rtop(db.transaction(['documents'], 'readwrite').objectStore('documents').add({ roomName, serverUpdateCounter: -1 }))
-                      )
-                )
-                // open room db and read existing data
-                return room.dbPromise = openDB(roomName)
-                  .then(db => {
-                    room.db = db
-                    const t = room.db.transaction(['updates'], 'readwrite')
-                    const updatesStore = t.objectStore('updates')
-                    // write current state as update
-                    const encoder = new BinaryEncoder()
-                    encodeStructsDS(y, encoder)
-                    return rtop(updatesStore.put(encoder.createBuffer())).then(() => {
-                      // read persisted state
-                      return rtop(updatesStore.getAll()).then(updates => {
-                        room.mutex(() => {
-                          y.transact(() => {
-                            updates.forEach(update => {
-                              decodePersisted(y, new BinaryDecoder(update))
-                            })
-                          }, true)
-                        })
-                      })
-                    })
-                  })
-              }
-              disconnectY (roomName) {
-                const {
-                  db, channel
-                } = this._rooms.get(roomName)
-                db.close()
-                if (channel !== null) {
-                  channel.close()
-                }
-                this._rooms.delete(roomName)
-              }
-
-              /**
-               * Remove all persisted data that belongs to a room.
-               * Automatically destroys all Yjs all Yjs instances that persist to
-               * the room. If `destroyYjsInstances = false` the persistence functionality
-               * will be removed from the Yjs instances.
-               *
-              removePersistedData (roomName, destroyYjsInstances = true) {
-                this.disconnectY(roomName)
-                return rtop(indexedDB.deleteDatabase(roomName))
-              }
-            }
-             {
-            if (room.db !== null) {
-              saveUpdate(room, updateBuffer)
-            }
-          }
-        }
-      })
-    })
-    // register document in documentsDB
-    this._documentsDB.then(
-      db =>
-        rtop(db.transaction(['documents'], 'readonly').objectStore('documents').get(roomName))
-          .then(
-            doc => doc === undefined && rtop(db.transaction(['documents'], 'readwrite').objectStore('documents').add({ roomName, serverUpdateCounter: -1 }))
-          )
-    )
-    // open room db and read existing data
-    return room.dbPromise = openDB(roomName)
-      .then(db => {
-        room.db = db
-        const t = room.db.transaction(['updates'], 'readwrite')
-        const updatesStore = t.objectStore('updates')
-        // write current state as update
-        const encoder = new BinaryEncoder()
-        encodeStructsDS(y, encoder)
-        return rtop(updatesStore.put(encoder.createBuffer())).then(() => {
-          // read persisted state
-          return rtop(updatesStore.getAll()).then(updates => {
-            room.mutex(() => {
-              y.transact(() => {
-                updates.forEach(update => {
-                  decodePersisted(y, new BinaryDecoder(update))
-                })
-              }, true)
-            })
-          })
-        })
-      })
-  }
-  disconnectY (roomName) {
-    const {
-      db, channel
-    } = this._rooms.get(roomName)
-    db.close()
-    if (channel !== null) {
-      channel.close()
-    }
-    this._rooms.delete(roomName)
-  }
-
-  /**
-   * Remove all persisted data that belongs to a room.
-   * Automatically destroys all Yjs all Yjs instances that persist to
-   * the room. If `destroyYjsInstances = false` the persistence functionality
-   * will be removed from the Yjs instances.
-   *
-  removePersistedData (roomName, destroyYjsInstances = true) {
-    this.disconnectY(roomName)
-    return rtop(indexedDB.deleteDatabase(roomName))
-  }
-}
-*/

persistence/decodePersisted.js

@@ -1,53 +0,0 @@
-/*
-import { integrateRemoteStructs } from '../MessageHandler/integrateRemoteStructs.js'
-import { writeStructs } from '../MessageHandler/syncStep1.js'
-import { writeDeleteSet, readDeleteSet } from '../MessageHandler/deleteSet.js'
-
-export const PERSIST_UPDATE = 0
-/**
- * Write an update to an encoder.
- *
- * @param {Y} y A Yjs instance
- * @param {Encoder} updateEncoder I.e. transaction.encodedStructs
- *
-export const encodeUpdate = (y, updateEncoder, encoder) => {
-  encoder.writeVarUint(PERSIST_UPDATE)
-  encoder.writeBinaryEncoder(updateEncoder)
-}
-
-export const PERSIST_STRUCTS_DS = 1
-
-/**
- * Write the current Yjs data model to an encoder.
- *
- * @param {Y} y A Yjs instance
- * @param {Encoder} encoder An encoder to write to
- *
-export const encodeStructsDS = (y, encoder) => {
-  encoder.writeVarUint(PERSIST_STRUCTS_DS)
-  writeStructs(y, encoder, new Map())
-  writeDeleteSet(y, encoder)
-}
-
-/**
- * Feed the Yjs instance with the persisted state
- * @param {Y} y A Yjs instance.
- * @param {Decoder} decoder A Decoder instance that holds the file content.
- *
-export const decodePersisted = (y, decoder) => {
-  y.transact(() => {
-    while (decoder.hasContent()) {
-      const contentType = decoder.readVarUint()
-      switch (contentType) {
-        case PERSIST_UPDATE:
-          integrateRemoteStructs(decoder, y)
-          break
-        case PERSIST_STRUCTS_DS:
-          integrateRemoteStructs(decoder, y)
-          readDeleteSet(y, decoder)
-          break
-      }
-    }
-  }, true)
-}
-*/

persistence/leveldb.js

@@ -1,125 +0,0 @@
-/**
- * @module persistence/leveldb
- * This module re-uses the encoding of syncProtocol to store and read updates from leveldb.
- */
-
-const level = require('level')
-const Y = require('../build/yjs.js')
-const mux = Y.createMutex()
-
-/*
- * Improves the uniqueness of timestamps.
- * We gamble with the fact that users won't create more than 10000 changes on a single document
- * within one millisecond (also assuming clock works correctly).
- */
-let timestampIterator = 0
-/**
- * @return {string} A random, time-based string starting with "${roomName}:"
- */
-const getNextTimestamp = () => {
-  timestampIterator = (timestampIterator + 1) % 10000
-  return `${Date.now()}${timestampIterator.toString().padStart(4, '0')}`
-}
-
-/**
- * @param {string} docName
- * @return {string}
- */
-const generateEntryKey = docName => `${docName}#${getNextTimestamp()}`
-
-/**
- *
- * @param {any} db
- * @param {string} docName
- * @param {Uint8Array | ArrayBuffer} buf
- */
-const writeEntry = (db, docName, buf) => db.put(generateEntryKey(docName), buf)
-
-/**
- * @param {Uint8Array} arr
- * @param {Y.Y} ydocument
- */
-const readEntry = (arr, ydocument) => mux(() =>
-  Y.syncProtocol.readSyncMessage(Y.decoding.createDecoder(arr), Y.encoding.createEncoder(), ydocument)
-)
-
-/**
- * @param {any} db
- * @param {string} docName
- * @param {Y.Y} ydocument
- */
-const loadFromPersistence = (db, docName, ydocument) => new Promise((resolve, reject) =>
-  db.createReadStream({
-    gte: `${docName}#`,
-    lte: `${docName}#Z`,
-    keys: false,
-    values: true
-  })
-    .on('data', data => readEntry(data, ydocument))
-    .on('error', reject)
-    .on('end', resolve)
-    .on('close', resolve)
-)
-
-const persistState = (db, docName, ydocument) => {
-  const encoder = Y.encoding.createEncoder()
-  Y.syncProtocol.writeSyncStep2(encoder, ydocument, new Map())
-  const entryKey = generateEntryKey(docName)
-  const entryPromise = db.put(entryKey, Y.encoding.toBuffer(encoder))
-  const delOps = []
-  return new Promise((resolve, reject) => db.createKeyStream({
-    gte: `${docName}#`,
-    lt: entryKey
-  })
-    .on('data', key => delOps.push({ type: 'del', key }))
-    .on('error', reject)
-    .on('end', resolve)
-    .on('close', resolve)
-  ).then(() => entryPromise).then(() => db.batch(delOps))
-}
-
-/**
- * Persistence layer for Leveldb.
- */
-exports.LevelDbPersistence = class LevelDbPersistence {
-  /**
-   * @param {string} fpath Path to leveldb database
-   */
-  constructor (fpath) {
-    this.db = level(fpath, { valueEncoding: 'binary' })
-  }
-  /**
-   * Retrieve all data from LevelDB and automatically persist all document updates to leveldb.
-   *
-   * @param {string} docName
-   * @param {Y.Y} ydocument
-   */
-  bindState (docName, ydocument) {
-    // write all updates received from other clients
-    // - unless it is created by this persistence layer (e.g. loadFromPersistence, we we mux).
-    ydocument.on('afterTransaction', (y, transaction) => {
-      if (transaction.encodedStructsLen > 0) {
-        mux(() => {
-          const encoder = Y.encoding.createEncoder()
-          Y.syncProtocol.writeUpdate(encoder, transaction.encodedStructsLen, transaction.encodedStructs)
-          writeEntry(this.db, docName, Y.encoding.toBuffer(encoder))
-        })
-      }
-    })
-    // read all data from persistence
-    return loadFromPersistence(this.db, docName, ydocument).then(() =>
-      // write current state (just in case anything was added before state was bound)
-      this.writeState(docName, ydocument)
-    )
-  }
-  /**
-   * Write current state to persistence layer. Deletes all entries that were made before.
-   * Call this method at any time - the recommended time to call this method is before the ydocument is destroyed.
-   *
-   * @param {string} docName
-   * @param {Y.Y} ydocument
-   */
-  writeState (docName, ydocument) {
-    return persistState(this.db, docName, ydocument)
-  }
-}

protocols/auth.js

@@ -1,33 +0,0 @@
-
-import * as encoding from '../lib/encoding.js'
-import * as decoding from '../lib/decoding.js'
-import { Y } from '../utils/Y.js' // eslint-disable-line
-
-export const messagePermissionDenied = 0
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {string} reason
- */
-export const writePermissionDenied = (encoder, reason) => {
-  encoding.writeVarUint(encoder, messagePermissionDenied)
-  encoding.writeVarString(encoder, reason)
-}
-
-/**
- * @callback PermissionDeniedHandler
- * @param {any} y
- * @param {string} reason
- */
-
-/**
- *
- * @param {decoding.Decoder} decoder
- * @param {Y} y
- * @param {PermissionDeniedHandler} permissionDeniedHandler
- */
-export const readAuthMessage = (decoder, y, permissionDeniedHandler) => {
-  switch (decoding.readVarUint(decoder)) {
-    case messagePermissionDenied: permissionDeniedHandler(y, decoding.readVarString(decoder))
-  }
-}

protocols/awareness.js

@@ -1,121 +0,0 @@
-/**
- * @module awareness-protocol
- */
-
-import * as encoding from '../lib/encoding.js'
-import * as decoding from '../lib/decoding.js'
-import { Y } from '../utils/Y.js' // eslint-disable-line
-
-const messageUsersStateChanged = 0
-
-/**
- * @typedef {Object} UserStateUpdate
- * @property {number} UserStateUpdate.userID
- * @property {number} UserStateUpdate.clock
- * @property {Object} UserStateUpdate.state
- */
-
-/**
- * @param {encoding.Encoder} encoder
- * @param {Array<UserStateUpdate>} stateUpdates
- */
-export const writeUsersStateChange = (encoder, stateUpdates) => {
-  const len = stateUpdates.length
-  encoding.writeVarUint(encoder, messageUsersStateChanged)
-  encoding.writeVarUint(encoder, len)
-  for (let i = 0; i < len; i++) {
-    const {userID, state, clock} = stateUpdates[i]
-    encoding.writeVarUint(encoder, userID)
-    encoding.writeVarUint(encoder, clock)
-    encoding.writeVarString(encoder, JSON.stringify(state))
-  }
-}
-
-export const readUsersStateChange = (decoder, y) => {
-  const added = []
-  const updated = []
-  const removed = []
-  const len = decoding.readVarUint(decoder)
-  for (let i = 0; i < len; i++) {
-    const userID = decoding.readVarUint(decoder)
-    const clock = decoding.readVarUint(decoder)
-    const state = JSON.parse(decoding.readVarString(decoder))
-    const uClock = y.awarenessClock.get(userID) || 0
-    y.awarenessClock.set(userID, clock)
-    if (state === null) {
-      // only write if clock increases. cannot overwrite
-      if (y.awareness.has(userID) && uClock < clock) {
-        y.awareness.delete(userID)
-        removed.push(userID)
-      }
-    } else if (uClock <= clock) { // allow to overwrite (e.g. when client was on, then offline)
-      if (y.awareness.has(userID)) {
-        updated.push(userID)
-      } else {
-        added.push(userID)
-      }
-      y.awareness.set(userID, state)
-      y.awarenessClock.set(userID, clock)
-    }
-  }
-  if (added.length > 0 || updated.length > 0 || removed.length > 0) {
-    y.emit('awareness', {
-      added, updated, removed
-    })
-  }
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {encoding.Encoder} encoder
- * @return {Array<UserStateUpdate>}
- */
-export const forwardUsersStateChange = (decoder, encoder) => {
-  const len = decoding.readVarUint(decoder)
-  const updates = []
-  encoding.writeVarUint(encoder, messageUsersStateChanged)
-  encoding.writeVarUint(encoder, len)
-  for (let i = 0; i < len; i++) {
-    const userID = decoding.readVarUint(decoder)
-    const clock = decoding.readVarUint(decoder)
-    const state = decoding.readVarString(decoder)
-    encoding.writeVarUint(encoder, userID)
-    encoding.writeVarUint(encoder, clock)
-    encoding.writeVarString(encoder, state)
-    updates.push({userID, state: JSON.parse(state), clock})
-  }
-  return updates
-}
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {Y} y
- */
-export const readAwarenessMessage = (decoder, y) => {
-  switch (decoding.readVarUint(decoder)) {
-    case messageUsersStateChanged:
-      readUsersStateChange(decoder, y)
-      break
-  }
-}
-
-/**
- * @typedef {Object} UserState
- * @property {number} UserState.userID
- * @property {any} UserState.state
- * @property {number} UserState.clock
- */
-
-/**
- * @param {decoding.Decoder} decoder
- * @param {encoding.Encoder} encoder
- * @return {Array<UserState>} Array of state updates
- */
-export const forwardAwarenessMessage = (decoder, encoder) => {
-  let s = []
-  switch (decoding.readVarUint(decoder)) {
-    case messageUsersStateChanged:
-      s = forwardUsersStateChange(decoder, encoder)
-  }
-  return s
-}