Relicense under MIT and remove patents grant (#1967)

Summary:
**Summary**

After internal discussion and approval by the legal team, we decided to align Draft.js with other Facebook open source projects [recently re-licensed under MIT](https://code.fb.com/web/relicensing-react-jest-flow-and-immutable-js/).

This PR removes the patents grant and re-licenses all Draft.js source files under the MIT license.

**Test Plan**

`yarn lint`
Manual code inspection
Pull Request resolved: #1967

Differential Revision: D13572529

fbshipit-source-id: f59982148515fdc7a2f697c92e1939e211b6125c

.eslintrc.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  */
 
 module.exports = {

LICENSE

@@ -1,31 +1,21 @@
-BSD License
+MIT License
 
-For Draft.js software
+Copyright (c) Facebook, Inc. and its affiliates.
 
-Copyright (c) 2013-present, Facebook, Inc.
-All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
- * Redistributions of source code must retain the above copyright notice, this
-   list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright notice,
-   this list of conditions and the following disclaimer in the documentation
-   and/or other materials provided with the distribution.
-
- * Neither the name Facebook nor the names of its contributors may be used to
-   endorse or promote products derived from this software without specific
-   prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -147,8 +147,7 @@ We actively welcome pull requests. Learn how to
 
 ## License
 
-Draft.js is [BSD Licensed](https://github.com/facebook/draft-js/blob/master/LICENSE).
-We also provide an additional [patent grant](https://github.com/facebook/draft-js/blob/master/PATENTS).
+Draft.js is [MIT licensed](https://github.com/facebook/draft-js/blob/master/LICENSE).
 
 Examples provided in this repository and in the documentation are separately
 licensed.

gulpfile.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  */
 
 'use strict';
@@ -62,11 +61,10 @@ var babelOptsFlow = {
 var COPYRIGHT_HEADER = `/**
  * Draft v<%= version %>
  *
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  */
 `;
 

package.json

@@ -13,13 +13,12 @@
   "files": [
     "dist/",
     "lib/",
-    "LICENSE",
-    "PATENTS"
+    "LICENSE"
   ],
   "main": "lib/Draft.js",
   "style": "dist/Draft.css",
   "repository": "facebook/draft-js",
-  "license": "BSD-3-Clause",
+  "license": "MIT",
   "scripts": {
     "prepublish": "npm run build",
     "pretest": "node node_modules/fbjs-scripts/node/check-dev-engines.js package.json",

prettier.config.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  */
 
 module.exports = {

scripts/jest/hasteImpl.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @flow
  */

scripts/jest/preprocessor.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  */
 
 var babel = require('babel-core');

scripts/jest/shims.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  */

scripts/module-map.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  */
 
 module.exports = Object.assign(

src/Draft.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow

src/__mocks__/generateRandomKey.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  */

src/component/base/DraftEditor.css

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @providesModule DraftEditor
  */

src/component/base/DraftEditor.react.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow

src/component/base/DraftEditorPlaceholder.css

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @providesModule DraftEditorPlaceholder
  */

src/component/base/DraftEditorPlaceholder.react.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow strict-local

src/component/base/DraftEditorProps.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow

src/component/base/DraftScrollPosition.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow strict

src/component/base/DraftTextAlignment.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow strict

src/component/base/__tests__/DraftEditor.react-test.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @emails oncall+draft_js
  * @format

src/component/contents/DraftEditorBlock.react.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow

src/component/contents/DraftEditorContents-core.react.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow

src/component/contents/DraftEditorLeaf.react.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow

src/component/contents/DraftEditorTextNode.react.js

@@ -1,9 +1,8 @@
 /**
- * Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
+ * Copyright (c) Facebook, Inc. and its affiliates.
  *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
  *
  * @format
  * @flow strict-local