restrict ctr-A and ctr-E key commands to Mac

src/js/editor/editor.js

@@ -648,9 +648,9 @@ class Editor {
         this.handleNewline(event);
         break;
       case key.isPrintable():
-        let { range } = this;
+        range = this.range;
         let { isCollapsed } = range;
-        let nextPosition = range.head;
+        nextPosition = range.head;
 
         if (this.handleExpansion(event)) {
           event.preventDefault();

src/js/editor/key-commands.js

@@ -3,6 +3,7 @@ import { MODIFIERS, SPECIAL_KEYS } from '../utils/key';
 import { filter, reduce } from '../utils/array-utils';
 import assert from '../utils/assert';
 import Range from '../utils/cursor/range';
+import Browser from '../utils/browser';
 
 export const DEFAULT_KEY_COMMANDS = [{
   str: 'META+B',
@@ -53,19 +54,23 @@ export const DEFAULT_KEY_COMMANDS = [{
     });
   }
 }, {
-  // FIXME restrict to OS X only?
   str: 'CTRL+A',
   run(editor) {
+    if (!Browser.isMac) {
+      return false;
+    }
     let range = editor.cursor.offsets;
     let {head: {section}} = range;
     editor.run(postEditor => {
       postEditor.setRange(new Range(section.headPosition()));
     });
   }
 }, {
-  // FIXME restrict to OS X only?
   str: 'CTRL+E',
   run(editor) {
+    if (!Browser.isMac) {
+      return false;
+    }
     let range = editor.cursor.offsets;
     let {tail: {section}} = range;
     editor.run(postEditor => {

src/js/utils/browser.js

@@ -0,0 +1,3 @@
+export default {
+  isMac: /Mac/.test(navigator.platform)
+};