Serialize a subset of WebInputEvents to protobufs.

blimp/net/input_message_generator.cc

Index: blimp/net/input_message_generator.cc
diff --git a/blimp/net/input_message_generator.cc b/blimp/net/input_message_generator.cc
new file mode 100644
index 0000000000000000000000000000000000000000..09457da762c6510af81e37256867ce911e52ed43
--- /dev/null
+++ b/blimp/net/input_message_generator.cc
@@ -0,0 +1,184 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "blimp/net/input_message_generator.h"
+
+#include "base/logging.h"
+#include "blimp/common/proto/input.pb.h"
+#include "third_party/WebKit/public/platform/WebGestureDevice.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+
+namespace blimp {
+namespace {
+
+void WebGestureEventBaseToProto(const blink::WebGestureEvent* event,

[Wez, 2015/11/23 22:41:41]

const WebGestureEvent& here and below?

[David Trainor- moved to gerrit, 2015/11/24 20:08:28]

Done.

+                                GestureBaseProperties* proto) {
+  proto->set_x(event->x);
+  proto->set_y(event->y);
+  proto->set_global_x(event->globalX);
+  proto->set_global_y(event->globalY);
+}
+
+void GestureScrollBeginToProto(const blink::WebGestureEvent* event,
+                               InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GestureScrollBegin);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GestureScrollBegin* details = proto->mutable_gesture_scroll_begin();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+  details->set_delta_x_hint(event->data.scrollBegin.deltaXHint);
+  details->set_delta_y_hint(event->data.scrollBegin.deltaYHint);
+  details->set_target_viewport(event->data.scrollBegin.targetViewport);
+}
+
+void GestureScrollEndToProto(const blink::WebGestureEvent* event,
+                             InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GestureScrollEnd);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GestureScrollEnd* details = proto->mutable_gesture_scroll_end();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+}
+
+void GestureScrollUpdateToProto(const blink::WebGestureEvent* event,
+                                InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GestureScrollUpdate);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GestureScrollUpdate* details = proto->mutable_gesture_scroll_update();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+  details->set_delta_x(event->data.scrollUpdate.deltaX);
+  details->set_delta_y(event->data.scrollUpdate.deltaY);
+  details->set_velocity_x(event->data.scrollUpdate.velocityX);
+  details->set_velocity_y(event->data.scrollUpdate.velocityY);
+  details->set_previous_update_in_sequence_prevented(
+      event->data.scrollUpdate.previousUpdateInSequencePrevented);
+  details->set_prevent_propagation(
+      event->data.scrollUpdate.preventPropagation);
+  details->set_inertial(event->data.scrollUpdate.inertial);
+}
+
+void GestureFlingStartToProto(const blink::WebGestureEvent* event,
+                              InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GestureFlingStart);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GestureFlingStart* details = proto->mutable_gesture_fling_start();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+  details->set_velocity_x(event->data.flingStart.velocityX);
+  details->set_velocity_y(event->data.flingStart.velocityY);
+  details->set_target_viewport(event->data.flingStart.targetViewport);
+}
+
+void GestureFlingCancelToProto(const blink::WebGestureEvent* event,
+                               InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GestureFlingCancel);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GestureFlingCancel* details = proto->mutable_gesture_fling_cancel();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+  details->set_prevent_boosting(event->data.flingCancel.preventBoosting);
+}
+
+void GestureTapToProto(const blink::WebGestureEvent* event,
+                       InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GestureTap);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GestureTap* details = proto->mutable_gesture_tap();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+  details->set_tap_count(event->data.tap.tapCount);
+  details->set_width(event->data.tap.width);
+  details->set_height(event->data.tap.height);
+}
+
+void GesturePinchBeginToProto(const blink::WebGestureEvent* event,
+                              InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GesturePinchBegin);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GesturePinchBegin* details = proto->mutable_gesture_pinch_begin();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+}
+
+void GesturePinchEndToProto(const blink::WebGestureEvent* event,
+                            InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GesturePinchEnd);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GesturePinchEnd* details = proto->mutable_gesture_pinch_end();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+}
+
+void GesturePinchUpdateToProto(const blink::WebGestureEvent* event,
+                               InputMessage* proto) {
+  proto->set_type(InputMessage::Type_GesturePinchUpdate);
+  proto->set_timestamp_seconds(event->timeStampSeconds);
+
+  GesturePinchUpdate* details = proto->mutable_gesture_pinch_update();
+  WebGestureEventBaseToProto(event, details->mutable_base());
+  details->set_zoom_disabled(event->data.pinchUpdate.zoomDisabled);
+  details->set_scale(event->data.pinchUpdate.scale);
+}
+
+}  // namespace
+
+InputMessageGenerator::InputMessageGenerator() {}
+
+InputMessageGenerator::~InputMessageGenerator() {}
+
+bool InputMessageGenerator::GenerateMessage(const blink::WebInputEvent* event,
+                                            InputMessage* proto) {
+  switch (event->type) {
+    case blink::WebInputEvent::Type::GestureScrollBegin:
+      GestureScrollBeginToProto(
+          static_cast<const blink::WebGestureEvent*>(event),
+          proto);
+      break;
+    case blink::WebInputEvent::Type::GestureScrollEnd:
+      GestureScrollEndToProto(static_cast<const blink::WebGestureEvent*>(event),
+                              proto);
+      break;
+    case blink::WebInputEvent::Type::GestureScrollUpdate:
+      GestureScrollUpdateToProto(
+          static_cast<const blink::WebGestureEvent*>(event),
+          proto);
+      break;
+    case blink::WebInputEvent::Type::GestureFlingStart:
+      GestureFlingStartToProto(
+          static_cast<const blink::WebGestureEvent*>(event),
+          proto);
+      break;
+    case blink::WebInputEvent::Type::GestureFlingCancel:
+      GestureFlingCancelToProto(
+          static_cast<const blink::WebGestureEvent*>(event),
+          proto);
+      break;
+    case blink::WebInputEvent::Type::GestureTap:
+      GestureTapToProto(static_cast<const blink::WebGestureEvent*>(event),
+                        proto);
+      break;
+    case blink::WebInputEvent::Type::GesturePinchBegin:
+      GesturePinchBeginToProto(
+          static_cast<const blink::WebGestureEvent*>(event),
+          proto);
+      break;
+    case blink::WebInputEvent::Type::GesturePinchEnd:
+      GesturePinchEndToProto(static_cast<const blink::WebGestureEvent*>(event),
+                             proto);
+      break;
+    case blink::WebInputEvent::Type::GesturePinchUpdate:
+      GesturePinchUpdateToProto(
+          static_cast<const blink::WebGestureEvent*>(event),
+          proto);
+      break;
+    default:
+      // Unsupported WebInputEvent.

[Wez, 2015/11/23 22:41:41]

Could we instead list the events that we ignore explicitly, and perhaps
NOTIMPLEMENTED() them?

That way the switch will catch addition of new events that we should perhaps
care about.

[David Trainor- moved to gerrit, 2015/11/24 20:08:27]

Done.

+      return false;
+  }
+
+  return true;
+}
+
+}  // namespace blimp