InputHandler: prevent default for relavant keys

1 files changed, 11 insertions, 1 deletions

diff --git a/src/view/InputHandler.ts b/src/view/InputHandler.ts
index 86d4ec6..d06bcf8 100644
--- a/src/view/InputHandler.ts
+++ b/src/view/InputHandler.ts
@@ -13,8 +13,13 @@ class InputHandler {
                 this.listeners.forEach(l => l());
         }
 
-        constructor() {
+        constructor(private relevantKeys: {[key: number]: boolean}) {
                 window.addEventListener('keydown', (ev) => {
+                        if (!relevantKeys[ev.keyCode])
+                                return;
+
+                        ev.preventDefault();
+
                         if (!this.keys[ev.keyCode]) {
                                 this.keys[ev.keyCode] = true;
                                 this.callListeners();
@@ -22,6 +27,11 @@ class InputHandler {
                 });
 
                 window.addEventListener('keyup', (ev) => {
+                        if (!relevantKeys[ev.keyCode])
+                                return;
+
+                        ev.preventDefault();
+
                         if (this.keys[ev.keyCode]) {
                                 delete this.keys[ev.keyCode];
                                 this.callListeners();