added flow

Author: juliankrispel

.babelrc

@@ -1,3 +1,11 @@
 {
-  "presets": ["es2015", "stage-0"]
+  "presets": [
+    [
+      "env",
+    {
+      "modules": false,
+    }
+    ],
+    "flow"
+  ],
 }

.flowconfig

@@ -0,0 +1,19 @@
+[ignore]
+.*/node_modules/draft-js/lib/BlockNode.js.flow
+.*/node_modules/draft-js/lib/DraftEditorDragHandler.js.flow
+.*/node_modules/draft-js/lib/DraftEditorLeaf.react.js.flow
+.*/node_modules/draft-js/lib/DraftEditor.react.js.flow
+.*/node_modules/jsonlint/.*
+.*/build/.*
+
+[include]
+flow-typed
+
+[options]
+module.system.node.resolve_dirname=node_modules
+module.system=haste
+
+[lints]
+
+[version]
+^0.69.0

.gitignore

@@ -32,4 +32,4 @@ node_modules
 # Optional REPL history
 .node_repl_history
 
-lib/
+build/

flow-typed/draft-js/BlockNode.js.flow

@@ -0,0 +1,56 @@
+/**
+ * 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.
+ *
+ * @providesModule BlockNode
+ * @format
+ * @flow
+ */
+
+'use strict';
+
+import type CharacterMetadata from '../../node_modules/draft-js/lib/CharacterMetadata';
+import type { DraftBlockType } from '../../node_modules/draft-js/lib/DraftBlockType';
+import type { DraftInlineStyle } from '../../node_modules/draft-js/lib/DraftInlineStyle';
+import type { List, Map } from 'immutable';
+
+export type BlockNodeKey = string;
+
+export type BlockNodeConfig = {
+  characterList?: List<CharacterMetadata>;
+  data?: Map<any, any>;
+  depth?: number;
+  key?: BlockNodeKey;
+  text?: string;
+  type?: DraftBlockType;
+};
+
+// https://github.com/facebook/draft-js/issues/1492
+// prettier-ignore
+export interface BlockNode {
+  +findEntityRanges: (filterFn: (value: CharacterMetadata) => boolean, callback: (start: number, end: number) => void) => void;
+
+  +findStyleRanges: (filterFn: (value: CharacterMetadata) => boolean, callback: (start: number, end: number) => void) => void;
+
+  +getCharacterList: () => List<CharacterMetadata>;
+
+  +getData: () => Map<any, any>;
+
+  +getDepth: () => number;
+
+  +getEntityAt: (offset: number) => ?string;
+
+  +getInlineStyleAt: (offset: number) => DraftInlineStyle;
+
+  +getKey: () => BlockNodeKey;
+
+  +getLength: () => number;
+
+  +getText: () => string;
+
+  +getType: () => DraftBlockType;
+}