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README.md
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# ![Yjs](http://y-js.org/images/yjs.png)
Yjs is a framework for offline-first p2p shared editing on structured data like text, richtext, json, or XML.
It is fairly easy to get started, as Yjs hides most of the complexity of concurrent editing.
For additional information, demos, and tutorials visit [y-js.org](http://y-js.org/).
Yjs is a framework for offline-first p2p shared editing on structured data like
text, richtext, json, or XML. It is fairly easy to get started, as Yjs hides
most of the complexity of concurrent editing. For additional information, demos,
and tutorials visit [y-js.org](http://y-js.org/).
### Extensions
Yjs only knows how to resolve conflicts on shared data. You have to choose a ..
@ -11,7 +12,8 @@ Yjs only knows how to resolve conflicts on shared data. You have to choose a ..
* *Database* - a database to store your changes
* one or more *Types* - that represent the shared data
Connectors, Databases, and Types are available as modules that extend Yjs. Here is a list of the modules we know of:
Connectors, Databases, and Types are available as modules that extend Yjs. Here
is a list of the modules we know of:
##### Connectors
@ -38,7 +40,7 @@ Connectors, Databases, and Types are available as modules that extend Yjs. Here
|[map](https://github.com/y-js/y-map) | A shared Map implementation. Maps from text to any stringify-able object |
|[array](https://github.com/y-js/y-array) | A shared Array implementation |
|[xml](https://github.com/y-js/y-xml) | An implementation of the DOM. You can create a two way binding to Browser DOM objects |
|[text](https://github.com/y-js/y-text) | Collaborate on text. Supports two way binding to the [Ace Editor](https://ace.c9.io), textareas, input elements, and HTML elements (e.g. <*h1*>, or <*p*>) |
|[text](https://github.com/y-js/y-text) | Collaborate on text. Supports two way binding to the [Ace Editor](https://ace.c9.io), [CodeMirror](https://codemirror.net/), textareas, input elements, and HTML elements (e.g. <*h1*>, or <*p*>) |
|[richtext](https://github.com/y-js/y-richtext) | Collaborate on rich text. Supports two way binding to the [Quill Rich Text Editor](http://quilljs.com/)|
##### Other
@ -48,13 +50,15 @@ Connectors, Databases, and Types are available as modules that extend Yjs. Here
|[y-element](http://y-js.org/y-element/) | Yjs Polymer Element |
## Use it!
Install Yjs, and its modules with [bower](http://bower.io/), or [npm](https://www.npmjs.org/package/yjs).
Install Yjs, and its modules with [bower](http://bower.io/), or
[npm](https://www.npmjs.org/package/yjs).
### Bower
```
bower install --save yjs y-array % add all y-* modules you want to use
```
You only need to include the `y.js` file. Yjs is able to automatically require missing modules.
You only need to include the `y.js` file. Yjs is able to automatically require
missing modules.
```
<script src="./bower_components/yjs/y.js"></script>
```
@ -64,7 +68,8 @@ You only need to include the `y.js` file. Yjs is able to automatically require m
npm install --save yjs % add all y-* modules you want to use
```
If you don't include via script tag, you have to explicitly include all modules! (Same goes for other module systems)
If you don't include via script tag, you have to explicitly include all modules!
(Same goes for other module systems)
```
var Y = require('yjs')
require('y-array')(Y) // add the y-array type to Yjs
@ -135,23 +140,35 @@ Here is a simple example of a shared textarea
## Get Help & Give Help
There are some friendly people on [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/y-js/yjs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) who are eager to help, and answer questions. Please join!
Report _any_ issues to the [Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very soon, if possible.
Report _any_ issues to the
[Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very
soon, if possible.
# API
### Y(options)
* Y.extend(module1, module2, ..)
* Add extensions to Y
* `Y.extend(require('y-webrtc'))` has the same semantics as `require('y-webrtc')(Y)`
* `Y.extend(require('y-webrtc'))` has the same semantics as
`require('y-webrtc')(Y)`
* options.db
* Will be forwarded to the database adapter. Specify the database adaper on `options.db.name`.
* Have a look at the used database adapter repository to see all available options.
* Will be forwarded to the database adapter. Specify the database adaper on
`options.db.name`.
* Have a look at the used database adapter repository to see all available
options.
* options.connector
* Will be forwarded to the connector adapter. Specify the connector adaper on `options.connector.name`.
* All our connectors implement a `room` property. Clients that specify the same room share the same data.
* All of our connectors specify an `url` property that defines the connection endpoint of the used connector.
* All of our connectors also have a default connection endpoint that you can use for development.
* Set `options.connector.generateUserId = true` in order to genenerate a userid, instead of receiving one from the server. This way the `Y(..)` is immediately going to be resolved, without waiting for any confirmation from the server. Use with caution.
* Will be forwarded to the connector adapter. Specify the connector adaper on
`options.connector.name`.
* All our connectors implement a `room` property. Clients that specify the
same room share the same data.
* All of our connectors specify an `url` property that defines the connection
endpoint of the used connector.
* All of our connectors also have a default connection endpoint that you can
use for development.
* Set `options.connector.generateUserId = true` in order to genenerate a
userid, instead of receiving one from the server. This way the `Y(..)` is
immediately going to be resolved, without waiting for any confirmation from
the server. Use with caution.
* Have a look at the used connector repository to see all available options.
* options.sourceDir (browser only)
* Path where all y-* modules are stored
@ -167,16 +184,27 @@ require('y-map')(Y)
// ..
```
* options.share
* Specify on `options.share[arbitraryName]` types that are shared among all users.
* E.g. Specify `options.share[arbitraryName] = 'Array'` to require y-array and create an y-array type on `y.share[arbitraryName]`.
* If userA doesn't specify `options.share[arbitraryName]`, it won't be available for userA.
* If userB specifies `options.share[arbitraryName]`, it still won't be available for userA. But all the updates are send from userB to userA.
* In contrast to y-map, types on `y.share.*` cannot be overwritten or deleted. Instead, they are merged among all users. This feature is only available on `y.share.*`
* Weird behavior: It is supported that two users specify different types with the same property name.
E.g. userA specifies `options.share.x = 'Array'`, and userB specifies `options.share.x = 'Text'`. But they only share data if they specified the same type with the same property name
* Specify on `options.share[arbitraryName]` types that are shared among all
users.
* E.g. Specify `options.share[arbitraryName] = 'Array'` to require y-array and
create an y-array type on `y.share[arbitraryName]`.
* If userA doesn't specify `options.share[arbitraryName]`, it won't be
available for userA.
* If userB specifies `options.share[arbitraryName]`, it still won't be
available for userA. But all the updates are send from userB to userA.
* In contrast to y-map, types on `y.share.*` cannot be overwritten or deleted.
Instead, they are merged among all users. This feature is only available on
`y.share.*`
* Weird behavior: It is supported that two users specify different types with
the same property name.
E.g. userA specifies `options.share.x = 'Array'`, and userB specifies
`options.share.x = 'Text'`. But they only share data if they specified the
same type with the same property name
* options.type (browser only)
* Array of modules that Yjs needs to require, before instantiating a shared type.
* By default Yjs requires the specified database adapter, the specified connector, and all modules that are used in `options.share.*`
* Array of modules that Yjs needs to require, before instantiating a shared
type.
* By default Yjs requires the specified database adapter, the specified
connector, and all modules that are used in `options.share.*`
* Put all types here that you intend to use, but are not used in y.share.*
### Instantiated Y object (y)
@ -186,7 +214,8 @@ require('y-map')(Y)
* The specified database adapter is loaded
* The specified connector is loaded
* All types are included
* The connector is initialized, and a unique user id is set (received from the server)
* The connector is initialized, and a unique user id is set (received from the
server)
* Note: When using y-indexeddb, a retrieved user id is stored on `localStorage`
The promise returns an instance of Y. We denote it with a lower case `y`.
@ -204,7 +233,8 @@ The promise returns an instance of Y. We denote it with a lower case `y`.
* y.connector.disconnect()
* Force to disconnect this instance from the other instances
* y.connector.reconnect()
* Try to reconnect to the other instances (needs to be supported by the connector)
* Try to reconnect to the other instances (needs to be supported by the
connector)
* Not supported by y-xmpp
* y.close()
* Destroy this object.
@ -216,12 +246,14 @@ The promise returns an instance of Y. We denote it with a lower case `y`.
* Removes all data from the database
* Returns a promise
* y.db.stopGarbageCollector()
* Stop the garbage collector. Call y.db.garbageCollect() to continue garbage collection
* Stop the garbage collector. Call y.db.garbageCollect() to continue garbage
collection
* y.db.gc :: Boolean
* Whether gc is turned on
* y.db.gcTimeout :: Number (defaults to 50000 ms)
* Time interval between two garbage collect cycles
* It is required that all instances exchanged all messages after two garbage collect cycles (after 100000 ms per default)
* It is required that all instances exchanged all messages after two garbage
collect cycles (after 100000 ms per default)
* y.db.userId :: String
* The used user id for this client. **Never overwrite this**
@ -247,7 +279,9 @@ localStorage.debug = 'y*'
```
## Contribution
I created this framework during my bachelor thesis at the chair of computer science 5 [(i5)](http://dbis.rwth-aachen.de/cms), RWTH University. Since December 2014 I'm working on Yjs as a part of my student worker job at the i5.
I created this framework during my bachelor thesis at the chair of computer
science 5 [(i5)](http://dbis.rwth-aachen.de/cms), RWTH University. Since
December 2014 I'm working on Yjs as a part of my student worker job at the i5.
## License
Yjs is licensed under the [MIT License](./LICENSE).

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require('./Connectors/Test.js')(Y)
Y.debug = require('debug')
// Y.debug.log = console.log.bind(console)
var requiringModules = {}