chore: add comments and remove unused code

Author: ym

ui/src/components/WebRTCVideo.tsx

@@ -229,6 +229,7 @@ export default function WebRTCVideo() {
       if (rpcHidReady) {
         reportRelMouseEvent(dx, dy, buttons);
       } else {
+        // kept for backward compatibility
         send("relMouseReport", { dx, dy, buttons });
       }
       setMouseMove({ x, y, buttons });
@@ -260,6 +261,7 @@ export default function WebRTCVideo() {
       if (rpcHidReady) {
         reportAbsMouseEvent(x, y, buttons);
       } else {
+        // kept for backward compatibility
         send("absMouseReport", { x, y, buttons });
       }
       // We set that for the debug info bar

ui/src/hooks/useKeyboard.ts

@@ -51,26 +51,13 @@ export default function useKeyboard() {
       if (rpcHidReady) {
         console.debug("Sending keyboard report via HidRPC");
         reportKeyboardEvent(state.keys, state.modifier);
+        setkeyPressReportApiAvailable(true);
         return;
       }
 
       send("keyboardReport", { keys: state.keys, modifier: state.modifier }, (resp: JsonRpcResponse) => {
         if ("error" in resp) {
           console.error(`Failed to send keyboard report ${state}`, resp.error);
-        } else {
-          // If the device supports keyPressReport API, it will (also) return the keysDownState when we send
-          // the keyboardReport
-          const keysDownState = resp.result as KeysDownState;
-
-          if (keysDownState) {
-            setKeysDownState(keysDownState); // treat the response as the canonical state
-            setkeyPressReportApiAvailable(true); // if they returned a keysDownState, we ALSO know they also support keyPressReport
-          } else {
-            // older devices versions do not return the keyDownState
-            // so we just pretend they accepted what we sent
-            setKeysDownState(state);
-            setkeyPressReportApiAvailable(false); // we ALSO know they do not support keyPressReport
-          }
         }
       });
     },
@@ -79,7 +66,6 @@ export default function useKeyboard() {
       rpcHidReady,
       send,
       reportKeyboardEvent,
-      setKeysDownState,
       setkeyPressReportApiAvailable,
     ],
   );