Move UndoManager config outside

src/undo_manager/config.ts

@@ -0,0 +1,19 @@
+export interface UndoManagerConfig {
+  /**
+   * Maximum number of undo items.
+   * @default 500
+   */
+  maximumStackLength?: number;
+  /**
+   * Track component selection.
+   * @default true
+   */
+  trackSelection?: boolean;
+}
+
+const config: UndoManagerConfig = {
+  maximumStackLength: 500,
+  trackSelection: true,
+};
+
+export default config;

src/undo_manager/index.ts

@@ -28,11 +28,7 @@ import UndoManager from 'backbone-undo';
 import { isArray, isBoolean, isEmpty, unique, times } from 'underscore';
 import { Module } from '../abstract';
 import EditorModel from '../editor/model/Editor';
-
-export interface UndoManagerConfig {
-  maximumStackLength?: number;
-  trackSelection?: boolean;
-}
+import defaults, { UndoManagerConfig } from './config';
 
 export interface UndoGroup {
   index: number;
@@ -40,11 +36,6 @@ export interface UndoGroup {
   labels: string[];
 }
 
-const defaults: UndoManagerConfig = {
-  maximumStackLength: 500,
-  trackSelection: true,
-};
-
 const hasSkip = (opts: any) => opts.avoidStore || opts.noUndo;
 
 const getChanged = (obj: any) => Object.keys(obj.changedAttributes());