1/n splitting PR #1828: Initial forking of RichTextEditorUtil (#1828)

Summary:
We are splitting up and updating pieces of this PR by Mitermayer.

This chunk forks the RichTextEditorUtil and puts them both under the same Flow
interface, also adding a test. The forked NestedRichTextEditorUtil is a WIP
version of this utility.

This is directly taken from mitermayer 's fork, props to him
Pull Request resolved: #1828

Reviewed By: mitermayer

Differential Revision: D9181952

Pulled By: mitermayer

fbshipit-source-id: 75f08fdb228ae1b45f97ae29aeae2f3d5ea53650

Author: mitermayer

src/model/modifier/RichTextEditorUtil.js

@@ -7,24 +7,25 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @format
- * @flow
+ * @flow strict-local
  */
 
 'use strict';
 
 import type ContentState from 'ContentState';
 import type {DraftBlockType} from 'DraftBlockType';
 import type {DraftEditorCommand} from 'DraftEditorCommand';
+import type {DataObjectForLink, RichTextUtils} from 'RichTextUtils';
+import type SelectionState from 'SelectionState';
 import type URI from 'URI';
 
 const DraftModifier = require('DraftModifier');
 const EditorState = require('EditorState');
-const SelectionState = require('SelectionState');
 
 const adjustBlockDepthForContentState = require('adjustBlockDepthForContentState');
 const nullthrows = require('nullthrows');
 
-const RichTextEditorUtil = {
+const RichTextEditorUtil: RichTextUtils = {
   currentBlockContainsLink: function(editorState: EditorState): boolean {
     const selection = editorState.getSelection();
     const contentState = editorState.getCurrentContent();
@@ -47,7 +48,7 @@ const RichTextEditorUtil = {
       .getType();
   },
 
-  getDataObjectForLinkURL: function(uri: URI): Object {
+  getDataObjectForLinkURL: function(uri: URI): DataObjectForLink {
     return {url: uri.toString()};
   },
 

src/model/modifier/RichTextUtils.js

@@ -0,0 +1,67 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * @format
+ * @flow strict-local
+ */
+
+import type ContentState from 'ContentState';
+import type {DraftBlockType} from 'DraftBlockType';
+import type {DraftEditorCommand} from 'DraftEditorCommand';
+import type EditorState from 'EditorState';
+import type SelectionState from 'SelectionState';
+import type URI from 'URI';
+
+export type DataObjectForLink = {
+  url: string,
+};
+
+export type RichTextUtils = {
+  currentBlockContainsLink: (editorState: EditorState) => boolean,
+
+  getCurrentBlockType: (editorState: EditorState) => DraftBlockType,
+
+  getDataObjectForLinkURL: (uri: URI) => DataObjectForLink,
+
+  handleKeyCommand: (
+    editorState: EditorState,
+    command: DraftEditorCommand | string,
+  ) => ?EditorState,
+
+  insertSoftNewline: (editorState: EditorState) => EditorState,
+
+  onBackspace: (editorState: EditorState) => ?EditorState,
+
+  onDelete: (editorState: EditorState) => ?EditorState,
+
+  onTab: (
+    event: SyntheticKeyboardEvent<>,
+    editorState: EditorState,
+    maxDepth: number,
+  ) => EditorState,
+
+  toggleBlockType: (
+    editorState: EditorState,
+    blockType: DraftBlockType,
+  ) => EditorState,
+
+  toggleCode: (editorState: EditorState) => EditorState,
+
+  toggleInlineStyle: (
+    editorState: EditorState,
+    inlineStyle: string,
+  ) => EditorState,
+
+  toggleLink: (
+    editorState: EditorState,
+    targetSelection: SelectionState,
+    entityKey: ?string,
+  ) => EditorState,
+
+  tryToRemoveBlockStyle: (editorState: EditorState) => ?ContentState,
+};