Minor refactor

src/js/plugins/keyboard.js

@@ -1,4 +1,5 @@
 import Keys from '../utils/keys';
+import DOM from '../utils/dom';
 
 /**
  * Keyboard plugin.
@@ -28,17 +29,9 @@ export default class Keyboard {
     let method;
     let argument;
 
-    // Check if there's a focused element that might use the keyboard.
+    if (DOM.isFocusableElement()) {
-    if (document.activeElement) {
-      const isContentEditable = document.activeElement
-            .contentEditable !== 'inherit';
-      const isInput = ['INPUT', 'SELECT', 'OPTION', 'TEXTAREA']
-            .indexOf(document.activeElement.tagName) > -1;
-
-      if (isInput || isContentEditable) {
       return;
     }
-    }
 
     switch (event.which) {
       case Keys.AV_PAGE:

src/js/utils/dom.js

@@ -144,4 +144,25 @@ export default class DOM {
   static toArray(iterable) {
     return [].slice.call(iterable);
   }
+
+  /**
+   * Checks whether the document has focus on an input or contenteditable
+   * element.
+   * @return {boolean} Whether the focused element is an input or content
+   * editable.
+   */
+  static isFocusableElement() {
+    let result = false;
+
+    if (document.activeElement) {
+      const isContentEditable = document.activeElement
+          .contentEditable !== 'inherit';
+      const isInput = ['INPUT', 'SELECT', 'OPTION', 'TEXTAREA']
+          .indexOf(document.activeElement.tagName) > -1;
+
+      result = isInput || isContentEditable;
+    }
+
+    return result;
+  }
 }