Added basic keyboard controls for seeking and play/pause

multiplayer.js

@@ -384,6 +384,8 @@
                 }
             });
 
+            this.initKeyboard();
+
             // attach the shadow root
             this.shadowRoot.append(this._root);
         }
@@ -824,6 +826,39 @@
             window.requestAnimationFrame(paintBuffer);
         }
 
+        /*
+         *  Set up keyboard bindings.
+         */
+        initKeyboard() {
+            this._root.addEventListener('keydown', (event) => {
+                switch(event.key) {
+                case " ":
+                    this.togglePlayback();
+                    break;
+                case "ArrowRight":
+                    if(event.target === this._volumeSlider) {
+                        break;
+                    }
+                    let ahead = this._controlSource.currentTime + 5;
+                    if(ahead > this._controlSource.duration) {
+                        ahead = this._controlSource.duration;
+                    }
+                    this.setTime(ahead);
+                    break;
+                case "ArrowLeft":
+                    if(event.target === this._volumeSlider) {
+                        break;
+                    }
+                    let back = this._controlSource.currentTime - 5;
+                    if(back < 0) {
+                        back = 0;
+                    }
+                    this.setTime(back);
+                    break;
+                }
+            });
+        }
+
         /*
          *  Apply any saved settings from previous usage
          */