add pointer device event

Signed-off-by: dignow <linlong1265@gmail.com>

libs/hbb_common/protos/message.proto

@@ -111,12 +111,31 @@ message LoginResponse {
   }
 }
 
+message TouchScaleUpdate {
+  // The delta scale factor relative to the previous scale.
+  // delta * 1000
+  // 0 means scale end
+  int32 scale = 1;
+}
+
+message TouchEvent {
+  oneof union {
+    TouchScaleUpdate scale_update = 1;
+  }
+  repeated ControlKey modifiers = 2;
+}
+
+message PointerDeviceEvent {
+  oneof union {
+    TouchEvent touch_event = 1;
+  }
+}
+
 message MouseEvent {
   int32 mask = 1;
   sint32 x = 2;
   sint32 y = 3;
   repeated ControlKey modifiers = 4;
-  sint32 scale = 5;
 }
 
 enum KeyboardMode{
@@ -683,5 +702,6 @@ message Message {
     VoiceCallRequest voice_call_request = 23;
     VoiceCallResponse voice_call_response = 24;
     PeerInfo peer_info = 25;
+    PointerDeviceEvent pointer_device_event = 26;
   }
 }