From c22c125b7b13fb7d9985c1faef5df38ac638c80a Mon Sep 17 00:00:00 2001
From: Arne Keller <arne.keller@student.kit.edu>
Date: Sun, 7 Mar 2021 11:14:08 +0100
Subject: [PATCH] Activate shortcuts only if possible

---
 frontend/src/key-shortcuts.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/frontend/src/key-shortcuts.js b/frontend/src/key-shortcuts.js
index 2347eb0..ce59640 100644
--- a/frontend/src/key-shortcuts.js
+++ b/frontend/src/key-shortcuts.js
@@ -4,22 +4,26 @@ function handleKey(e) {
     if (e.target.tagName.toLowerCase() === "vaadin-text-field") {
         return;
     }
+    let element = null;
     if (e.keyCode === 37) {
         // left arrow
         if (!e.ctrlKey) {
-            document.getElementById("previous-step").click();
+            element = document.getElementById("previous-step");
         } else {
-            document.getElementById("first-step").click();
+            element = document.getElementById("first-step");
         }
     } else if (e.keyCode === 39) {
         // right arrow
         if (!e.ctrlKey) {
-            document.getElementById("next-step").click();
+            element = document.getElementById("next-step");
         } else {
-            document.getElementById("last-step").click();
+            element = document.getElementById("last-step");
         }
     } else if (e.key === "/") {
         document.getElementById("inputField").focus();
         e.preventDefault();
     }
+    if (element !== null) {
+        element.click();
+    }
 }