Add default `core:undo` and `core:redo` keymaps

src/dom_components/index.js

@@ -229,10 +229,7 @@ module.exports = () => {
      * @private
      */
     onLoad() {
-      const comps = this.getComponents();
-      comps.reset(c.components);
-      //const um = em && em.get('UndoManager');
-      //um && um.add(comps);
+      this.getComponents().reset(c.components);
     },
 
     /**

src/keymaps/index.js

@@ -12,9 +12,21 @@ import { isString } from 'underscore';
 const keymaster = require('keymaster');
 
 module.exports = () => {
+  let em;
   let config;
-  const configDef = {};
   const keymaps = {};
+  const configDef = {
+    defaults: {
+      'core:undo': {
+        keys: '⌘+z, ctrl+z',
+        handler: 'core:undo',
+      },
+      'core:redo': {
+        keys: '⌘+shift+z, ctrl+shift+z',
+        handler: 'core:redo',
+      }
+    }
+  };
 
   return {
 
@@ -39,11 +51,23 @@ module.exports = () => {
      * @private
      */
     init(opts = {}) {
-      config = { ...opts, ...configDef };
-      this.em = config.em;
+      config = { ...configDef, ...opts };
+      em = config.em;
+      this.em = em;
       return this;
     },
 
+
+    onLoad() {
+      const defKeys = config.defaults;
+
+      for (let id in defKeys) {
+        const value = defKeys[id];
+        this.add(id, value.keys, value.handler);
+      }
+    },
+
+
     /**
      * Add new keymap
      * @param {string} id Keymap id