├── slate-cursor-indicator
    ├── .vscode
    │   └── settings.json
    ├── .babelrc
    ├── src
    │   ├── cursor.js
    │   └── index.js
    ├── lib
    │   ├── index.js
    │   └── cursor.js
    └── package.json
├── collab-editor
    ├── public
    │   ├── robots.txt
    │   ├── favicon.ico
    │   ├── logo192.png
    │   ├── logo512.png
    │   ├── manifest.json
    │   └── index.html
    ├── src
    │   ├── setupTests.js
    │   ├── App.test.js
    │   ├── index.js
    │   ├── App.css
    │   ├── index.css
    │   ├── logo.svg
    │   ├── Components.js
    │   ├── serviceWorker.js
    │   └── App.js
    ├── .gitignore
    ├── package.json
    └── README.md
├── slate-multicursor-0.0.2
    └── package
    │   ├── .babelrc
    │   ├── index.js
    │   └── package.json
├── package.json
├── defaultValue.js
├── .gitignore
├── server.js
└── README.md


/slate-cursor-indicator/.vscode/settings.json:
--------------------------------------------------------------------------------
1 | {
2 |   "git.ignoreLimitWarning": true
3 | }


--------------------------------------------------------------------------------
/slate-cursor-indicator/.babelrc:
--------------------------------------------------------------------------------
1 | {
2 |   "compact": false,
3 |   "presets": [ "es2015", "react"]
4 | }


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/collab-editor/public/robots.txt:
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1 | # https://www.robotstxt.org/robotstxt.html
2 | User-agent: *
3 | Disallow:
4 | 


--------------------------------------------------------------------------------
/slate-multicursor-0.0.2/package/.babelrc:
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1 | {
2 |   "compact": false,
3 |   "presets": [ "es2015", "react"]
4 | }


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/collab-editor/public/favicon.ico:
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https://raw.githubusercontent.com/Immortalin/slate-operational-transform/HEAD/collab-editor/public/favicon.ico


--------------------------------------------------------------------------------
/collab-editor/public/logo192.png:
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https://raw.githubusercontent.com/Immortalin/slate-operational-transform/HEAD/collab-editor/public/logo192.png


--------------------------------------------------------------------------------
/collab-editor/public/logo512.png:
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https://raw.githubusercontent.com/Immortalin/slate-operational-transform/HEAD/collab-editor/public/logo512.png


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/collab-editor/src/setupTests.js:
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1 | // jest-dom adds custom jest matchers for asserting on DOM nodes.
2 | // allows you to do things like:
3 | // expect(element).toHaveTextContent(/react/i)
4 | // learn more: https://github.com/testing-library/jest-dom
5 | import '@testing-library/jest-dom/extend-expect';
6 | 


--------------------------------------------------------------------------------
/collab-editor/src/App.test.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import { render } from '@testing-library/react';
 3 | import App from './App';
 4 | 
 5 | test('renders learn react link', () => {
 6 |   const { getByText } = render(<App />);
 7 |   const linkElement = getByText(/learn react/i);
 8 |   expect(linkElement).toBeInTheDocument();
 9 | });
10 | 


--------------------------------------------------------------------------------
/collab-editor/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "collab-server",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "server.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "keywords": [],
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "@teamwork/websocket-json-stream": "^2.0.0",
14 |     "sharedb": "^1.3.3",
15 |     "slate": "^0.57.2",
16 |     "ws": "^7.2.3"
17 |   }
18 | }
19 | 


--------------------------------------------------------------------------------
/slate-cursor-indicator/src/cursor.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | 
 3 | class Cursor extends React.Component {
 4 |   constructor(props) {
 5 |     super(props)
 6 |     console.log(props, 'CALLED PROPSSSSS #################')
 7 |     this.style = {
 8 |       borderColor: this.props.borderColor || 'red',
 9 |       padding: '5px',
10 |     }
11 |   }
12 | 
13 |   render() {
14 |     return (
15 |       <span style={this.style}>
16 |         {this.props.showName && <span>{this.props.username}</span>}
17 |       </span>
18 |     )
19 |   }
20 | }
21 | 
22 | export default Cursor;


--------------------------------------------------------------------------------
/collab-editor/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import './index.css';
 4 | import App from './App';
 5 | import * as serviceWorker from './serviceWorker';
 6 | 
 7 | ReactDOM.render(
 8 |   <React.StrictMode>
 9 |     <App />
10 |   </React.StrictMode>,
11 |   document.getElementById('root')
12 | );
13 | 
14 | // If you want your app to work offline and load faster, you can change
15 | // unregister() to register() below. Note this comes with some pitfalls.
16 | // Learn more about service workers: https://bit.ly/CRA-PWA
17 | serviceWorker.unregister();
18 | 


--------------------------------------------------------------------------------
/collab-editor/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     },
10 |     {
11 |       "src": "logo192.png",
12 |       "type": "image/png",
13 |       "sizes": "192x192"
14 |     },
15 |     {
16 |       "src": "logo512.png",
17 |       "type": "image/png",
18 |       "sizes": "512x512"
19 |     }
20 |   ],
21 |   "start_url": ".",
22 |   "display": "standalone",
23 |   "theme_color": "#000000",
24 |   "background_color": "#ffffff"
25 | }
26 | 


--------------------------------------------------------------------------------
/slate-cursor-indicator/src/index.js:
--------------------------------------------------------------------------------
 1 | 
 2 | import CursorComponent from './cursor';
 3 | import { Range } from 'slate';
 4 | 
 5 | const CursorIndicator = (options) => {
 6 | 
 7 |   const markName = options.markName || 'cursor';
 8 |   function addCursorIndicator(change) {
 9 |     change.operations.forEach((operation) => {
10 |       if (operation.type === 'set_selection') {
11 |         console.log('DONENENENENE ################################', markName)
12 |         change.addMark(markName);
13 |       }
14 |     })
15 |   }
16 | 
17 |   return {
18 |       addCursorIndicator
19 |   }
20 | }
21 | 
22 | export const Cursor = CursorComponent;
23 | export default CursorIndicator;


--------------------------------------------------------------------------------
/collab-editor/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   height: 40vmin;
 7 |   pointer-events: none;
 8 | }
 9 | 
10 | @media (prefers-reduced-motion: no-preference) {
11 |   .App-logo {
12 |     animation: App-logo-spin infinite 20s linear;
13 |   }
14 | }
15 | 
16 | .App-header {
17 |   background-color: #282c34;
18 |   min-height: 100vh;
19 |   display: flex;
20 |   flex-direction: column;
21 |   align-items: center;
22 |   justify-content: center;
23 |   font-size: calc(10px + 2vmin);
24 |   color: white;
25 | }
26 | 
27 | .App-link {
28 |   color: #61dafb;
29 | }
30 | 
31 | @keyframes App-logo-spin {
32 |   from {
33 |     transform: rotate(0deg);
34 |   }
35 |   to {
36 |     transform: rotate(360deg);
37 |   }
38 | }
39 | 


--------------------------------------------------------------------------------
/slate-multicursor-0.0.2/package/index.js:
--------------------------------------------------------------------------------
 1 | 
 2 | 
 3 | const CursorIndicator = (options) => {
 4 | 
 5 |   const markName = options.markName || 'cursor';
 6 | 
 7 |   function addCursorIndicator(change) {
 8 |     change.operations.forEach((operation) => {
 9 |       if (operation.type === 'set_selection') {
10 |         change.addMark(markName);
11 |       }
12 |     })
13 |   }
14 | 
15 |   function removeCursorIndicator(change, node) {
16 |     const { document, startKey } = change.value
17 |     const startBlock = document.getClosestBlock(startKey)
18 |     const parent = document.getParent(startBlock.key)
19 |     const parentParent = document.getParent(parent.key)
20 |     const index = parentParent.nodes.indexOf(parent)
21 |     change.removeMarkByKey(parentParent.key, 0, index, markName)
22 |   }
23 | 
24 |   return {
25 |       addCursorIndicator,
26 |       removeCursorIndicator
27 |   }
28 | }
29 | 
30 | module.exports = CursorIndicator;


--------------------------------------------------------------------------------
/slate-cursor-indicator/lib/index.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | Object.defineProperty(exports, "__esModule", {
 4 |   value: true
 5 | });
 6 | exports.Cursor = undefined;
 7 | 
 8 | var _cursor = require('./cursor');
 9 | 
10 | var _cursor2 = _interopRequireDefault(_cursor);
11 | 
12 | var _slate = require('slate');
13 | 
14 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
15 | 
16 | var CursorIndicator = function CursorIndicator(options) {
17 | 
18 |   var markName = options.markName || 'cursor';
19 |   function addCursorIndicator(change) {
20 |     change.operations.forEach(function (operation) {
21 |       if (operation.type === 'set_selection') {
22 |         console.log('DONENENENENE ################################', markName);
23 |         change.addMark(markName);
24 |       }
25 |     });
26 |   }
27 | 
28 |   return {
29 |     addCursorIndicator: addCursorIndicator
30 |   };
31 | };
32 | 
33 | var Cursor = exports.Cursor = _cursor2.default;
34 | exports.default = CursorIndicator;


--------------------------------------------------------------------------------
/slate-multicursor-0.0.2/package/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "slate-multicursor",
 3 |   "version": "0.0.2",
 4 |   "description": "A users' cursors position indicator for slatejs collaborative editing",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "repository": {
10 |     "type": "git",
11 |     "url": "git+https://github.com/humandx/slate-multicursor.git"
12 |   },
13 |   "keywords": [
14 |     "slate",
15 |     "collaboration",
16 |     "cursor",
17 |     "indicator",
18 |     "editor",
19 |     "user",
20 |     "typing"
21 |   ],
22 |   "author": "Human Diagnosis Project",
23 |   "license": "MIT",
24 |   "bugs": {
25 |     "url": "https://github.com/humandx/slate-multicursor/issues"
26 |   },
27 |   "homepage": "https://github.com/humandx/slate-multicursor#readme",
28 |   "peerDependencies": {
29 |     "slate": "*",
30 |     "react": "*"
31 |   },
32 |   "devDependencies": {
33 |     "babel-cli": "^6.26.0",
34 |     "babel-preset-es2015": "^6.24.1",
35 |     "babel-preset-react": "^6.24.1",
36 |     "eslint": "^4.10.0"
37 |   }
38 | }
39 | 


--------------------------------------------------------------------------------
/collab-editor/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "collab-editor",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "@testing-library/jest-dom": "^4.2.4",
 7 |     "@testing-library/react": "^9.3.2",
 8 |     "@testing-library/user-event": "^7.1.2",
 9 |     "emotion": "^10.0.27",
10 |     "json0-ot-diff": "^1.0.5",
11 |     "react": "^16.13.1",
12 |     "react-dom": "^16.13.1",
13 |     "react-scripts": "3.4.1",
14 |     "reconnecting-websocket": "^4.4.0",
15 |     "sharedb": "^1.3.3",
16 |     "slate": "^0.57.2",
17 |     "slate-history": "^0.57.2",
18 |     "slate-react": "^0.57.2"
19 |   },
20 |   "scripts": {
21 |     "start": "react-scripts start",
22 |     "build": "react-scripts build",
23 |     "test": "react-scripts test",
24 |     "eject": "react-scripts eject"
25 |   },
26 |   "eslintConfig": {
27 |     "extends": "react-app"
28 |   },
29 |   "browserslist": {
30 |     "production": [
31 |       ">0.2%",
32 |       "not dead",
33 |       "not op_mini all"
34 |     ],
35 |     "development": [
36 |       "last 1 chrome version",
37 |       "last 1 firefox version",
38 |       "last 1 safari version"
39 |     ]
40 |   }
41 | }
42 | 


--------------------------------------------------------------------------------
/slate-cursor-indicator/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "slate-cursor-indicator",
 3 |   "version": "0.0.2",
 4 |   "description": "A users' cursors position indicator for slatejs collaborative editing",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "repository": {
10 |     "type": "git",
11 |     "url": "git+https://github.com/humandx/slate-cursor-indicator.git"
12 |   },
13 |   "keywords": [
14 |     "slate",
15 |     "collaboration",
16 |     "cursor",
17 |     "indicator",
18 |     "editor",
19 |     "user",
20 |     "typing"
21 |   ],
22 |   "author": "Human Diagnosis Project",
23 |   "license": "MIT",
24 |   "bugs": {
25 |     "url": "https://github.com/humandx/slate-cursor-indicator/issues"
26 |   },
27 |   "scripts": {
28 |     "build": "babel src --out-dir lib"
29 |   },
30 |   "homepage": "https://github.com/humandx/slate-cursor-indicator#readme",
31 |   "peerDependencies": {
32 |     "slate": "*",
33 |     "react": "*"
34 |   },
35 |   "devDependencies": {
36 |     "babel-cli": "^6.26.0",
37 |     "babel-preset-es2015": "^6.24.1",
38 |     "babel-preset-react": "^6.24.1",
39 |     "eslint": "^4.10.0"
40 |   }
41 | }
42 | 


--------------------------------------------------------------------------------
/defaultValue.js:
--------------------------------------------------------------------------------
 1 | 
 2 | const defaultValue = {
 3 |   users: { 0: { placeholder: true } },
 4 |   // selection: { anchor: { path: [0, 0], offset: 0 }, focus: { path: [0, 0], offset: 0 } }, 
 5 |   children: [
 6 |     {
 7 |       type: 'paragraph',
 8 |       children: [
 9 |         { text: 'This is editable ' },
10 |         { text: 'rich', bold: true },
11 |         { text: ' text, ' },
12 |         { text: 'much', italic: true },
13 |         { text: ' better than a ' },
14 |         { text: '<textarea>', code: true },
15 |         { text: '!' },
16 |       ],
17 |     },
18 |     {
19 |       type: 'paragraph',
20 |       children: [
21 |         {
22 |           text:
23 |             "Since it's rich text, you can do things like turn a selection of text ",
24 |         },
25 |         { text: 'bold', bold: true },
26 |         {
27 |           text:
28 |             ', or add a semantically rendered block quote in the middle of the page, like this:',
29 |         },
30 |       ],
31 |     },
32 |     {
33 |       type: 'block-quote',
34 |       children: [{ text: 'A wise quote.' }],
35 |     },
36 |     {
37 |       type: 'paragraph',
38 |       children: [{ text: 'Try it out for yourself!' }],
39 |     },
40 |   ]
41 | }
42 | 
43 | module.exports = defaultValue


--------------------------------------------------------------------------------
/collab-editor/src/index.css:
--------------------------------------------------------------------------------
 1 | html,
 2 | input,
 3 | textarea,
 4 | body {
 5 |   margin: 0;
 6 |   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
 7 |     'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
 8 |     sans-serif;
 9 |   -webkit-font-smoothing: antialiased;
10 |   -moz-osx-font-smoothing: grayscale;
11 | 
12 |   line-height: 1.4;
13 |   /* background: #eee; */
14 | }
15 | 
16 | code {
17 |   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
18 |     monospace;
19 | }
20 | 
21 | p {
22 |   margin: 0;
23 | }
24 | 
25 | pre {
26 |   padding: 10px;
27 |   background-color: #eee;
28 |   white-space: pre-wrap;
29 | }
30 | 
31 | :not(pre) > code {
32 |   font-family: monospace;
33 |   background-color: #eee;
34 |   padding: 3px;
35 | }
36 | 
37 | img {
38 |   max-width: 100%;
39 |   max-height: 20em;
40 | }
41 | 
42 | blockquote {
43 |   border-left: 2px solid #ddd;
44 |   margin-left: 0;
45 |   margin-right: 0;
46 |   padding-left: 10px;
47 |   color: #aaa;
48 |   font-style: italic;
49 | }
50 | 
51 | blockquote[dir='rtl'] {
52 |   border-left: none;
53 |   padding-left: 0;
54 |   padding-right: 10px;
55 |   border-right: 2px solid #ddd;
56 | }
57 | 
58 | table {
59 |   border-collapse: collapse;
60 | }
61 | 
62 | td {
63 |   padding: 10px;
64 |   border: 2px solid #ddd;
65 | }
66 | 
67 | input {
68 |   box-sizing: border-box;
69 |   font-size: 0.85em;
70 |   width: 100%;
71 |   padding: 0.5em;
72 |   border: 2px solid #ddd;
73 |   background: #fafafa;
74 | }
75 | 
76 | input:focus {
77 |   outline: 0;
78 |   border-color: blue;
79 | }
80 | 
81 | [data-slate-editor] > * + * {
82 |   margin-top: 1em;
83 | }


--------------------------------------------------------------------------------
/collab-editor/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8" />
 5 |     <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1" />
 7 |     <meta name="theme-color" content="#000000" />
 8 |     <meta
 9 |       name="description"
10 |       content="Web site created using create-react-app"
11 |     />
12 |     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
13 |     <!--
14 |       manifest.json provides metadata used when your web app is installed on a
15 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
16 |     -->
17 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
18 |     <!--
19 |       Notice the use of %PUBLIC_URL% in the tags above.
20 |       It will be replaced with the URL of the `public` folder during the build.
21 |       Only files inside the `public` folder can be referenced from the HTML.
22 | 
23 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
24 |       work correctly both with client-side routing and a non-root public URL.
25 |       Learn how to configure a non-root public URL by running `npm run build`.
26 |     -->
27 |     <title>React App</title>
28 |   </head>
29 |   <body>
30 |     <noscript>You need to enable JavaScript to run this app.</noscript>
31 |     <div id="root"></div>
32 |     <!--
33 |       This HTML file is a template.
34 |       If you open it directly in the browser, you will see an empty page.
35 | 
36 |       You can add webfonts, meta tags, or analytics to this file.
37 |       The build step will place the bundled scripts into the <body> tag.
38 | 
39 |       To begin the development, run `npm start` or `yarn start`.
40 |       To create a production bundle, use `npm run build` or `yarn build`.
41 |     -->
42 |   </body>
43 | </html>
44 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
  1 | 
  2 | # Created by https://www.gitignore.io/api/node
  3 | # Edit at https://www.gitignore.io/?templates=node
  4 | 
  5 | ### Node ###
  6 | # Logs
  7 | logs
  8 | *.log
  9 | npm-debug.log*
 10 | yarn-debug.log*
 11 | yarn-error.log*
 12 | lerna-debug.log*
 13 | 
 14 | # Diagnostic reports (https://nodejs.org/api/report.html)
 15 | report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
 16 | 
 17 | # Runtime data
 18 | pids
 19 | *.pid
 20 | *.seed
 21 | *.pid.lock
 22 | 
 23 | # Directory for instrumented libs generated by jscoverage/JSCover
 24 | lib-cov
 25 | 
 26 | # Coverage directory used by tools like istanbul
 27 | coverage
 28 | *.lcov
 29 | 
 30 | # nyc test coverage
 31 | .nyc_output
 32 | 
 33 | # Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
 34 | .grunt
 35 | 
 36 | # Bower dependency directory (https://bower.io/)
 37 | bower_components
 38 | 
 39 | # node-waf configuration
 40 | .lock-wscript
 41 | 
 42 | # Compiled binary addons (https://nodejs.org/api/addons.html)
 43 | build/Release
 44 | 
 45 | # Dependency directories
 46 | node_modules/
 47 | jspm_packages/
 48 | 
 49 | # TypeScript v1 declaration files
 50 | typings/
 51 | 
 52 | # TypeScript cache
 53 | *.tsbuildinfo
 54 | 
 55 | # Optional npm cache directory
 56 | .npm
 57 | 
 58 | # Optional eslint cache
 59 | .eslintcache
 60 | 
 61 | # Optional REPL history
 62 | .node_repl_history
 63 | 
 64 | # Output of 'npm pack'
 65 | *.tgz
 66 | 
 67 | # Yarn Integrity file
 68 | .yarn-integrity
 69 | 
 70 | # dotenv environment variables file
 71 | .env
 72 | .env.test
 73 | 
 74 | # parcel-bundler cache (https://parceljs.org/)
 75 | .cache
 76 | 
 77 | # next.js build output
 78 | .next
 79 | 
 80 | # nuxt.js build output
 81 | .nuxt
 82 | 
 83 | # rollup.js default build output
 84 | dist/
 85 | 
 86 | # Uncomment the public line if your project uses Gatsby
 87 | # https://nextjs.org/blog/next-9-1#public-directory-support
 88 | # https://create-react-app.dev/docs/using-the-public-folder/#docsNav
 89 | # public
 90 | 
 91 | # Storybook build outputs
 92 | .out
 93 | .storybook-out
 94 | 
 95 | # vuepress build output
 96 | .vuepress/dist
 97 | 
 98 | # Serverless directories
 99 | .serverless/
100 | 
101 | # FuseBox cache
102 | .fusebox/
103 | 
104 | # DynamoDB Local files
105 | .dynamodb/
106 | 
107 | # Temporary folders
108 | tmp/
109 | temp/
110 | 
111 | # End of https://www.gitignore.io/api/node
112 | 


--------------------------------------------------------------------------------
/server.js:
--------------------------------------------------------------------------------
 1 | const defaultValue = require('./defaultValue')
 2 | const WebSocket = require('ws')
 3 | const WebSocketJSONStream = require('@teamwork/websocket-json-stream')
 4 | const ShareDB = require('sharedb')
 5 | const share = new ShareDB()
 6 | const connection = share.connect()
 7 | const doc = connection.get("my_documents", "hello_world")
 8 | 
 9 | function noop() { }
10 | 
11 | function heartbeat() {
12 |     this.isAlive = true;
13 | }
14 | 
15 | doc.create(defaultValue, () => {
16 | 
17 |     const port = 9080
18 |     console.log("Server starting on port:", port)
19 |     const wss = new WebSocket.Server({ port: port });
20 |     const user_map = new Map()
21 | 
22 |     wss.on('connection', function connection(ws, req) {
23 |         //   ws.on('message', function incoming(message) {
24 |         //     console.log('received: %s', message);
25 |         //   });
26 |         ws.isAlive = true;
27 |         ws.on('pong', heartbeat);
28 | 
29 |         //   ws.send('something');
30 |         const user_key = req.headers['sec-websocket-key']
31 |         const json_stream = new WebSocketJSONStream(ws)
32 |         // Monotonic increasing user id
33 |         const user_id = Math.max(...Object.keys(doc.data.users)) + 1
34 |         user_map.set(user_key, user_id)
35 |         console.log("New user " + user_id + " joined!")
36 |         console.log("Total users:")
37 |         console.log(user_map)
38 | 
39 |         doc.submitOp([{ p: ['users', user_id], oi: {} }], () => {
40 |             share.listen(json_stream)
41 |         })
42 | 
43 |         const delete_user = () => {
44 |             console.log("Users before deletion:")
45 |             console.log(doc.data.users)
46 |             const user_id = user_map.get(user_key)
47 |             doc.submitOp([{ p: ['users', user_id], od: doc.data.users[user_id] }], () => {
48 |                 console.log("Users after deletion:")
49 |                 console.log(doc.data.users)
50 |             })
51 |             user_map.delete(user_key)
52 |         }
53 | 
54 |         // https://github.com/websockets/ws#how-to-detect-and-close-broken-connections
55 |         const interval = setInterval(function ping() {
56 |             wss.clients.forEach(function each(ws) {
57 |                 if (ws.isAlive === false) {
58 |                     delete_user()
59 |                     return ws.terminate();
60 |                 }
61 | 
62 |                 ws.isAlive = false;
63 |                 ws.ping(noop);
64 |             });
65 |         }, 30000);
66 | 
67 |         ws.on('close', () => {
68 |             delete_user()
69 |             clearInterval(interval)
70 |         })
71 | 
72 |     })
73 | 
74 | })


--------------------------------------------------------------------------------
/collab-editor/src/logo.svg:
--------------------------------------------------------------------------------
1 | <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
2 |     <g fill="#61DAFB">
3 |         <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
4 |         <circle cx="420.9" cy="296.5" r="45.7"/>
5 |         <path d="M520.5 78.1z"/>
6 |     </g>
7 | </svg>
8 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # Slate JS Editor Operational Transform Example using ShareDB
 2 | 
 3 | ## Instructions
 4 | Cursors are WIP, for testing please use https://github.com/Immortalin/slate-operational-transform/tree/00e56152355535416a1007ffca296b7bfcfd7b22
 5 | ```shell
 6 | cd slate-operational-transform
 7 | npm install
 8 | npm start
 9 | 
10 | ```
11 | And in another shell
12 | ```shell
13 | cd slate-operational-transform/collab_editor 
14 | yarn install
15 | yarn start
16 | ```
17 | Open two different browsers and navigate to `localhost:3000`, all changes in one browser should be mirrored in another.
18 | ## Caveat Emptor
19 | - This is a demo, there are a lot of optimizations and features missing.
20 | - Invoking JSON0-ot-diff on every edit [is not very efficient](https://github.com/ottypes/json1/issues/13).
21 | - A better way would be to either [manually annotate the various slate operations](https://github.com/qqwee/slate-ottype) or to add a debounce of some sort. A debounce would trade off between granularity (important for good UX) versus performance. Of course there are other ways such as separate thread of computing operations using WebWorkers, or perhaps rewrite the core algorithm in WebAssembly. If you paste a large body of text there is a second or two of lag as diff function has to catch up. The holy grail would be to implement the transformation function using Slate's [native Operation type](https://github.com/ianstormtaylor/slate/blob/master/packages/slate/src/interfaces/operation.ts). (there are 9 operations, but that takes a lot of time to build and debug so it is faster to piggy back off ShareDB unless you have a team of engineers willing to build a solution from ground up.)
22 | - Multi-cursors, presence, live chat etc. are left as an exercise to the reader.
23 | ## Literature
24 | 
25 | https://www.tiny.cloud/blog/real-time-collaborative-editing-slate-js/
26 | https://blog.aha.io/text-editor/
27 | https://ckeditor.com/blog/Lessons-learned-from-creating-a-rich-text-editor-with-real-time-collaboration/
28 | 
29 | https://medium.com/@david.roegiers/building-a-real-time-collaborative-text-editor-for-the-web-draftjs-sharedb-1dd8e8826295
30 | https://hackernoon.com/operational-transformation-the-real-time-collaborative-editing-algorithm-bf8756683f66
31 | https://hackernoon.com/analysing-different-operational-transformation-algorithms-for-collaborative-editing-60fcc49ef24b
32 | https://medium.com/@srijancse/how-real-time-collaborative-editing-work-operational-transformation-ac4902d75682
33 | https://medium.com/coinmonks/operational-transformations-as-an-algorithm-for-automatic-conflict-resolution-3bf8920ea447
34 | https://github.com/qqwee/slate-ottype
35 | https://github.com/ksimons/ot-slatejs
36 | https://github.com/quilljs/delta/blob/e5517726f6665e293e851457b1cc0c7a17576e50/src/Delta.ts#L390
37 | 
38 | 


--------------------------------------------------------------------------------
/slate-cursor-indicator/lib/cursor.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | Object.defineProperty(exports, "__esModule", {
 4 |   value: true
 5 | });
 6 | 
 7 | var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 8 | 
 9 | var _react = require('react');
10 | 
11 | var _react2 = _interopRequireDefault(_react);
12 | 
13 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
14 | 
15 | function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
16 | 
17 | function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
18 | 
19 | function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
20 | 
21 | var Cursor = function (_React$Component) {
22 |   _inherits(Cursor, _React$Component);
23 | 
24 |   function Cursor(props) {
25 |     _classCallCheck(this, Cursor);
26 | 
27 |     var _this = _possibleConstructorReturn(this, (Cursor.__proto__ || Object.getPrototypeOf(Cursor)).call(this, props));
28 | 
29 |     console.log(props, 'CALLED PROPSSSSS #################');
30 |     _this.style = {
31 |       borderColor: _this.props.borderColor || 'red',
32 |       padding: '5px'
33 |     };
34 |     return _this;
35 |   }
36 | 
37 |   _createClass(Cursor, [{
38 |     key: 'render',
39 |     value: function render() {
40 |       return _react2.default.createElement(
41 |         'span',
42 |         { style: this.style },
43 |         this.props.showName && _react2.default.createElement(
44 |           'span',
45 |           null,
46 |           this.props.username
47 |         )
48 |       );
49 |     }
50 |   }]);
51 | 
52 |   return Cursor;
53 | }(_react2.default.Component);
54 | 
55 | exports.default = Cursor;


--------------------------------------------------------------------------------
/collab-editor/README.md:
--------------------------------------------------------------------------------
 1 | ## Create React App
 2 | This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
 3 | 
 4 | ## Available Scripts
 5 | 
 6 | In the project directory, you can run:
 7 | 
 8 | ### `yarn start`
 9 | 
10 | Runs the app in the development mode.<br />
11 | Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
12 | 
13 | The page will reload if you make edits.<br />
14 | You will also see any lint errors in the console.
15 | 
16 | ### `yarn test`
17 | 
18 | Launches the test runner in the interactive watch mode.<br />
19 | See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
20 | 
21 | ### `yarn build`
22 | 
23 | Builds the app for production to the `build` folder.<br />
24 | It correctly bundles React in production mode and optimizes the build for the best performance.
25 | 
26 | The build is minified and the filenames include the hashes.<br />
27 | Your app is ready to be deployed!
28 | 
29 | See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
30 | 
31 | ### `yarn eject`
32 | 
33 | **Note: this is a one-way operation. Once you `eject`, you can’t go back!**
34 | 
35 | If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
36 | 
37 | Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
38 | 
39 | You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
40 | 
41 | ## Learn More
42 | 
43 | You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
44 | 
45 | To learn React, check out the [React documentation](https://reactjs.org/).
46 | 
47 | ### Code Splitting
48 | 
49 | This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting
50 | 
51 | ### Analyzing the Bundle Size
52 | 
53 | This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size
54 | 
55 | ### Making a Progressive Web App
56 | 
57 | This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app
58 | 
59 | ### Advanced Configuration
60 | 
61 | This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration
62 | 
63 | ### Deployment
64 | 
65 | This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
66 | 
67 | ### `yarn build` fails to minify
68 | 
69 | This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify
70 | 


--------------------------------------------------------------------------------
/collab-editor/src/Components.js:
--------------------------------------------------------------------------------
  1 | import React from 'react'
  2 | import ReactDOM from 'react-dom'
  3 | import { cx, css } from 'emotion'
  4 | 
  5 | export const Button = React.forwardRef(
  6 |   ({ className, active, reversed, ...props }, ref) => (
  7 |     <span
  8 |       {...props}
  9 |       ref={ref}
 10 |       className={cx(
 11 |         className,
 12 |         css`
 13 |           cursor: pointer;
 14 |           color: ${reversed
 15 |             ? active
 16 |               ? 'white'
 17 |               : '#aaa'
 18 |             : active
 19 |             ? 'black'
 20 |             : '#ccc'};
 21 |         `
 22 |       )}
 23 |     />
 24 |   )
 25 | )
 26 | 
 27 | export const EditorValue = React.forwardRef(
 28 |   ({ className, value, ...props }, ref) => {
 29 |     const textLines = value.document.nodes
 30 |       .map(node => node.text)
 31 |       .toArray()
 32 |       .join('\n')
 33 |     return (
 34 |       <div
 35 |         ref={ref}
 36 |         {...props}
 37 |         className={cx(
 38 |           className,
 39 |           css`
 40 |             margin: 30px -20px 0;
 41 |           `
 42 |         )}
 43 |       >
 44 |         <div
 45 |           className={css`
 46 |             font-size: 14px;
 47 |             padding: 5px 20px;
 48 |             color: #404040;
 49 |             border-top: 2px solid #eeeeee;
 50 |             background: #f8f8f8;
 51 |           `}
 52 |         >
 53 |           Slate's value as text
 54 |         </div>
 55 |         <div
 56 |           className={css`
 57 |             color: #404040;
 58 |             font: 12px monospace;
 59 |             white-space: pre-wrap;
 60 |             padding: 10px 20px;
 61 |             div {
 62 |               margin: 0 0 0.5em;
 63 |             }
 64 |           `}
 65 |         >
 66 |           {textLines}
 67 |         </div>
 68 |       </div>
 69 |     )
 70 |   }
 71 | )
 72 | 
 73 | export const Icon = React.forwardRef(({ className, ...props }, ref) => (
 74 |   <span
 75 |     {...props}
 76 |     ref={ref}
 77 |     className={cx(
 78 |       'material-icons',
 79 |       className,
 80 |       css`
 81 |         font-size: 18px;
 82 |         vertical-align: text-bottom;
 83 |       `
 84 |     )}
 85 |   />
 86 | ))
 87 | 
 88 | export const Instruction = React.forwardRef(({ className, ...props }, ref) => (
 89 |   <div
 90 |     {...props}
 91 |     ref={ref}
 92 |     className={cx(
 93 |       className,
 94 |       css`
 95 |         white-space: pre-wrap;
 96 |         margin: 0 -20px 10px;
 97 |         padding: 10px 20px;
 98 |         font-size: 14px;
 99 |         background: #f8f8e8;
100 |       `
101 |     )}
102 |   />
103 | ))
104 | 
105 | export const Menu = React.forwardRef(({ className, ...props }, ref) => (
106 |   <div
107 |     {...props}
108 |     ref={ref}
109 |     className={cx(
110 |       className,
111 |       css`
112 |         & > * {
113 |           display: inline-block;
114 |         }
115 | 
116 |         & > * + * {
117 |           margin-left: 15px;
118 |         }
119 |       `
120 |     )}
121 |   />
122 | ))
123 | 
124 | export const Portal = ({ children }) => {
125 |   return ReactDOM.createPortal(children, document.body)
126 | }
127 | 
128 | export const Toolbar = React.forwardRef(({ className, ...props }, ref) => (
129 |   <Menu
130 |     {...props}
131 |     ref={ref}
132 |     className={cx(
133 |       className,
134 |       css`
135 |         position: relative;
136 |         padding: 1px 18px 17px;
137 |         margin: 0 -20px;
138 |         border-bottom: 2px solid #eee;
139 |         margin-bottom: 20px;
140 |       `
141 |     )}
142 |   />
143 | ))


--------------------------------------------------------------------------------
/collab-editor/src/serviceWorker.js:
--------------------------------------------------------------------------------
  1 | // This optional code is used to register a service worker.
  2 | // register() is not called by default.
  3 | 
  4 | // This lets the app load faster on subsequent visits in production, and gives
  5 | // it offline capabilities. However, it also means that developers (and users)
  6 | // will only see deployed updates on subsequent visits to a page, after all the
  7 | // existing tabs open on the page have been closed, since previously cached
  8 | // resources are updated in the background.
  9 | 
 10 | // To learn more about the benefits of this model and instructions on how to
 11 | // opt-in, read https://bit.ly/CRA-PWA
 12 | 
 13 | const isLocalhost = Boolean(
 14 |   window.location.hostname === 'localhost' ||
 15 |     // [::1] is the IPv6 localhost address.
 16 |     window.location.hostname === '[::1]' ||
 17 |     // 127.0.0.0/8 are considered localhost for IPv4.
 18 |     window.location.hostname.match(
 19 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 20 |     )
 21 | );
 22 | 
 23 | export function register(config) {
 24 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 25 |     // The URL constructor is available in all browsers that support SW.
 26 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
 27 |     if (publicUrl.origin !== window.location.origin) {
 28 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 29 |       // from what our page is served on. This might happen if a CDN is used to
 30 |       // serve assets; see https://github.com/facebook/create-react-app/issues/2374
 31 |       return;
 32 |     }
 33 | 
 34 |     window.addEventListener('load', () => {
 35 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 36 | 
 37 |       if (isLocalhost) {
 38 |         // This is running on localhost. Let's check if a service worker still exists or not.
 39 |         checkValidServiceWorker(swUrl, config);
 40 | 
 41 |         // Add some additional logging to localhost, pointing developers to the
 42 |         // service worker/PWA documentation.
 43 |         navigator.serviceWorker.ready.then(() => {
 44 |           console.log(
 45 |             'This web app is being served cache-first by a service ' +
 46 |               'worker. To learn more, visit https://bit.ly/CRA-PWA'
 47 |           );
 48 |         });
 49 |       } else {
 50 |         // Is not localhost. Just register service worker
 51 |         registerValidSW(swUrl, config);
 52 |       }
 53 |     });
 54 |   }
 55 | }
 56 | 
 57 | function registerValidSW(swUrl, config) {
 58 |   navigator.serviceWorker
 59 |     .register(swUrl)
 60 |     .then(registration => {
 61 |       registration.onupdatefound = () => {
 62 |         const installingWorker = registration.installing;
 63 |         if (installingWorker == null) {
 64 |           return;
 65 |         }
 66 |         installingWorker.onstatechange = () => {
 67 |           if (installingWorker.state === 'installed') {
 68 |             if (navigator.serviceWorker.controller) {
 69 |               // At this point, the updated precached content has been fetched,
 70 |               // but the previous service worker will still serve the older
 71 |               // content until all client tabs are closed.
 72 |               console.log(
 73 |                 'New content is available and will be used when all ' +
 74 |                   'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
 75 |               );
 76 | 
 77 |               // Execute callback
 78 |               if (config && config.onUpdate) {
 79 |                 config.onUpdate(registration);
 80 |               }
 81 |             } else {
 82 |               // At this point, everything has been precached.
 83 |               // It's the perfect time to display a
 84 |               // "Content is cached for offline use." message.
 85 |               console.log('Content is cached for offline use.');
 86 | 
 87 |               // Execute callback
 88 |               if (config && config.onSuccess) {
 89 |                 config.onSuccess(registration);
 90 |               }
 91 |             }
 92 |           }
 93 |         };
 94 |       };
 95 |     })
 96 |     .catch(error => {
 97 |       console.error('Error during service worker registration:', error);
 98 |     });
 99 | }
100 | 
101 | function checkValidServiceWorker(swUrl, config) {
102 |   // Check if the service worker can be found. If it can't reload the page.
103 |   fetch(swUrl, {
104 |     headers: { 'Service-Worker': 'script' },
105 |   })
106 |     .then(response => {
107 |       // Ensure service worker exists, and that we really are getting a JS file.
108 |       const contentType = response.headers.get('content-type');
109 |       if (
110 |         response.status === 404 ||
111 |         (contentType != null && contentType.indexOf('javascript') === -1)
112 |       ) {
113 |         // No service worker found. Probably a different app. Reload the page.
114 |         navigator.serviceWorker.ready.then(registration => {
115 |           registration.unregister().then(() => {
116 |             window.location.reload();
117 |           });
118 |         });
119 |       } else {
120 |         // Service worker found. Proceed as normal.
121 |         registerValidSW(swUrl, config);
122 |       }
123 |     })
124 |     .catch(() => {
125 |       console.log(
126 |         'No internet connection found. App is running in offline mode.'
127 |       );
128 |     });
129 | }
130 | 
131 | export function unregister() {
132 |   if ('serviceWorker' in navigator) {
133 |     navigator.serviceWorker.ready
134 |       .then(registration => {
135 |         registration.unregister();
136 |       })
137 |       .catch(error => {
138 |         console.error(error.message);
139 |       });
140 |   }
141 | }
142 | 


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/collab-editor/src/App.js:
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  1 | import React, { useCallback, useMemo, useState, useEffect, useRef } from 'react'
  2 | import isHotkey from 'is-hotkey'
  3 | import { Editable, withReact, useSlate, Slate } from 'slate-react'
  4 | import { Editor, Transforms, Text, createEditor } from 'slate'
  5 | import { withHistory } from 'slate-history'
  6 | 
  7 | import { Button, Icon, Toolbar } from './Components'
  8 | import ReconnectingWebSocket from 'reconnecting-websocket';
  9 | import * as sharedb from 'sharedb/lib/client'
 10 | import * as jsondiff from 'json0-ot-diff'
 11 | import { css } from 'emotion'
 12 | 
 13 | const ws_client = new ReconnectingWebSocket("ws://localhost:9080")
 14 | const connection = new sharedb.Connection(ws_client)
 15 | const doc = connection.get('my_documents', 'hello_world')
 16 | 
 17 | const HOTKEYS = {
 18 |   'mod+b': 'bold',
 19 |   'mod+i': 'italic',
 20 |   'mod+u': 'underline',
 21 |   'mod+`': 'code',
 22 | }
 23 | 
 24 | const LIST_TYPES = ['numbered-list', 'bulleted-list']
 25 | 
 26 | const RichTextExample = () => {
 27 |   useEffect(() => {
 28 |     doc.subscribe(() => {
 29 |       console.log("Subscribed:")
 30 |       console.log(doc.data)
 31 |       myId.current = Math.max(...Object.keys(doc.data.users))
 32 |       current_users.current = doc.data.users
 33 |       console.log("My ID:")
 34 |       console.log(myId.current)
 35 |       console.log("Total users:")
 36 |       console.log(current_users.current)
 37 |       syncMutex.current = true
 38 |       setValue(doc.data.children)
 39 |       syncMutex.current = false
 40 |     })
 41 | 
 42 |     doc.on('op', () => {
 43 |       console.log("Op:")
 44 |       console.log(doc.data)
 45 |       syncMutex.current = true
 46 |       // editor.selection = doc.data.selection
 47 |       setValue(doc.data.children)
 48 |       syncMutex.current = false
 49 |     })
 50 | 
 51 |   }, [])
 52 | 
 53 | 
 54 |   const [value, setValue] = useState(initialValue)
 55 |   const oldValue = useRef()
 56 |   const myId = useRef()
 57 |   // const users = useRef()
 58 |   // const oldSelection = useRef({ anchor: { path: [0, 0], offset: 0 }, focus: { path: [0, 0], offset: 0 } })
 59 |   const current_users = useRef([])
 60 |   // const [value, setValue] = useState([])
 61 |   const renderElement = useCallback(props => <Element {...props} />, [])
 62 |   const renderLeaf = useCallback(props => <Leaf {...props} />, [])
 63 |   const editor = useMemo(() => withHistory(withReact(createEditor())), [])
 64 |   // See also: https://github.com/ianstormtaylor/slate/issues/3493
 65 |   const syncMutex = useRef(false) // prevents infinite loops due to onchange firing
 66 |   const sendOp = (...args) => {
 67 |     return new Promise((resolve, reject) => {
 68 |       doc.submitOp(...args, () => {
 69 |         resolve()
 70 |       })
 71 |     })
 72 |   }
 73 | 
 74 |   const decorate = useCallback(([node, path]) => {
 75 |     let ranges = []
 76 |     console.log(path)
 77 |     if (current_users.current.length !== 0 && Text.isText(node)) {
 78 |       // code needs refactoring, current code seems inefficient
 79 |       const selections = Object.values(doc.data.users).filter((entry) => !entry.hasOwnProperty("placeholder") && entry.hasOwnProperty("anchor") && entry.hasOwnProperty("focus"))
 80 |       // selections.forEach((entry) => {
 81 |       //     console.log(entry)
 82 |       //   if (entry.anchor.path === path || entry.focus.path === path) {
 83 |       //     ranges.push(entry)
 84 |       //   }
 85 |       // })
 86 |       console.log("decorating..")
 87 |       // console.log(current_selections.current)
 88 |       // console.log(doc.data.users)
 89 | 
 90 |       //  if (Text.isText(node)){}
 91 | 
 92 |       // console.log(ranges)
 93 |       ranges = selections
 94 |     }
 95 |     return ranges
 96 |   }, [current_users.current])
 97 | 
 98 |   return (
 99 |     <Slate editor={editor} value={value} onChange={newChildren => {
100 |       oldValue.current = { users: current_users.current, children: value }
101 |       if (typeof doc.data !== 'undefined') {
102 |         doc.data.users[myId.current.toString()] = { ...editor.selection, is_selected: true }
103 |         // current_users.current = doc.data.users
104 |         // console.log(current_users.current)
105 |         const diff = jsondiff(oldValue, { users: doc.data.users, children: newChildren })
106 | 
107 |         if (!syncMutex.current) {
108 |           // a quick optimisation to only send if array is not empty
109 |           if (Array.isArray(diff) && diff.length) {
110 |             console.log("diff:")
111 |             console.log(diff)
112 |             sendOp(diff)
113 |           }
114 |         }
115 |       }
116 |       // oldSelection.current = editor.selection
117 |     }
118 |     }>
119 |       <Toolbar>
120 |         <MarkButton format="bold" icon="format_bold" />
121 |         <MarkButton format="italic" icon="format_italic" />
122 |         <MarkButton format="underline" icon="format_underlined" />
123 |         <MarkButton format="code" icon="code" />
124 |         <BlockButton format="heading-one" icon="looks_one" />
125 |         <BlockButton format="heading-two" icon="looks_two" />
126 |         <BlockButton format="block-quote" icon="format_quote" />
127 |         <BlockButton format="numbered-list" icon="format_list_numbered" />
128 |         <BlockButton format="bulleted-list" icon="format_list_bulleted" />
129 |       </Toolbar>
130 |       <Editable
131 |         renderElement={renderElement}
132 |         renderLeaf={renderLeaf}
133 |         decorate={decorate}
134 |         placeholder="Enter some rich text…"
135 |         spellCheck
136 |         autoFocus
137 |         onKeyDown={event => {
138 |           for (const hotkey in HOTKEYS) {
139 |             if (isHotkey(hotkey, event)) {
140 |               event.preventDefault()
141 |               const mark = HOTKEYS[hotkey]
142 |               toggleMark(editor, mark)
143 |             }
144 |           }
145 |         }}
146 |       />
147 |     </Slate>
148 |   )
149 | }
150 | 
151 | const toggleBlock = (editor, format) => {
152 |   const isActive = isBlockActive(editor, format)
153 |   const isList = LIST_TYPES.includes(format)
154 | 
155 |   Transforms.unwrapNodes(editor, {
156 |     match: n => LIST_TYPES.includes(n.type),
157 |     split: true,
158 |   })
159 | 
160 |   Transforms.setNodes(editor, {
161 |     type: isActive ? 'paragraph' : isList ? 'list-item' : format,
162 |   })
163 | 
164 |   if (!isActive && isList) {
165 |     const block = { type: format, children: [] }
166 |     Transforms.wrapNodes(editor, block)
167 |   }
168 | }
169 | 
170 | const toggleMark = (editor, format) => {
171 |   const isActive = isMarkActive(editor, format)
172 | 
173 |   if (isActive) {
174 |     Editor.removeMark(editor, format)
175 |   } else {
176 |     Editor.addMark(editor, format, true)
177 |   }
178 | }
179 | 
180 | const isBlockActive = (editor, format) => {
181 |   const [match] = Editor.nodes(editor, {
182 |     match: n => n.type === format,
183 |   })
184 | 
185 |   return !!match
186 | }
187 | 
188 | const isMarkActive = (editor, format) => {
189 |   const marks = Editor.marks(editor)
190 |   return marks ? marks[format] === true : false
191 | }
192 | 
193 | const Element = ({ attributes, children, element }) => {
194 |   switch (element.type) {
195 |     case 'block-quote':
196 |       return <blockquote {...attributes}>{children}</blockquote>
197 |     case 'bulleted-list':
198 |       return <ul {...attributes}>{children}</ul>
199 |     case 'heading-one':
200 |       return <h1 {...attributes}>{children}</h1>
201 |     case 'heading-two':
202 |       return <h2 {...attributes}>{children}</h2>
203 |     case 'list-item':
204 |       return <li {...attributes}>{children}</li>
205 |     case 'numbered-list':
206 |       return <ol {...attributes}>{children}</ol>
207 |     default:
208 |       return <p {...attributes}>{children}</p>
209 |   }
210 | }
211 | 
212 | const mystyle = {
213 |   borderColor: 'red',
214 |   padding: '5px',
215 | }
216 | 
217 | const Leaf = ({ attributes, children, leaf }) => {
218 |   if (leaf.is_selected) {
219 |     console.log("I AM SELECTED!!!")
220 |     children =
221 |       <span
222 |         {...attributes}
223 |         className={css`
224 |         background-color: ${leaf.is_selected && '#ffeeba'};
225 |       `}
226 |       >
227 |         {children}
228 |         <span style={mystyle}></span>
229 |       </span>
230 |   }
231 | 
232 |   if (leaf.bold) {
233 |     children = <strong>{children}</strong>
234 |   }
235 | 
236 |   if (leaf.code) {
237 |     children = <code>{children}</code>
238 |   }
239 | 
240 |   if (leaf.italic) {
241 |     children = <em>{children}</em>
242 |   }
243 | 
244 |   if (leaf.underline) {
245 |     children = <u>{children}</u>
246 |   }
247 | 
248 |   return <span {...attributes}>{children}</span>
249 | }
250 | 
251 | const BlockButton = ({ format, icon }) => {
252 |   const editor = useSlate()
253 |   return (
254 |     <Button
255 |       active={isBlockActive(editor, format)}
256 |       onMouseDown={event => {
257 |         event.preventDefault()
258 |         toggleBlock(editor, format)
259 |       }}
260 |     >
261 |       <Icon>{icon}</Icon>
262 |     </Button>
263 |   )
264 | }
265 | 
266 | const MarkButton = ({ format, icon }) => {
267 |   const editor = useSlate()
268 |   return (
269 |     <Button
270 |       active={isMarkActive(editor, format)}
271 |       onMouseDown={event => {
272 |         event.preventDefault()
273 |         toggleMark(editor, format)
274 |       }}
275 |     >
276 |       <Icon>{icon}</Icon>
277 |     </Button>
278 |   )
279 | }
280 | 
281 | // Empty placeholder for initial load, editor will fetch ground truth from server
282 | const initialValue = [
283 |   {
284 |     type: 'paragraph',
285 |     children: [{ text: '' }]
286 |   }
287 | ]
288 | 
289 | export default RichTextExample


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