Serialize a subset of WebInputEvents to protobufs.

blimp/net/input_message_generator.cc

+// 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/blimp_message.pb.h"
+#include "blimp/common/proto/input.pb.h"
+#include "blimp/net/blimp_message_processor.h"
+#include "third_party/WebKit/public/platform/WebGestureDevice.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+
+namespace blimp {
+namespace {
+
+void CommonWebGestureToProto(const blink::WebGestureEvent& event,
+                             InputMessage::Type type,
+                             InputMessage* proto) {
+  proto->set_type(type);
+  proto->set_timestamp_seconds(event.timeStampSeconds);
+
+  GestureCommon* common = proto->mutable_gesture_common();
+  common->set_x(event.x);
+  common->set_y(event.y);
+  common->set_global_x(event.globalX);
+  common->set_global_y(event.globalY);
+}
+
+void GestureScrollBeginToProto(const blink::WebGestureEvent& event,
+                               InputMessage* proto) {
+  CommonWebGestureToProto(event, InputMessage::Type_GestureScrollBegin, proto);
+
+  GestureScrollBegin* details = proto->mutable_gesture_scroll_begin();
+  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) {
+  CommonWebGestureToProto(event, InputMessage::Type_GestureScrollEnd, proto);
+}
+
+void GestureScrollUpdateToProto(const blink::WebGestureEvent& event,
+                                InputMessage* proto) {
+  CommonWebGestureToProto(event, InputMessage::Type_GestureScrollUpdate, proto);
+
+  GestureScrollUpdate* details = proto->mutable_gesture_scroll_update();
+  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) {
+  CommonWebGestureToProto(event, InputMessage::Type_GestureFlingStart, proto);
+
+  GestureFlingStart* details = proto->mutable_gesture_fling_start();
+  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) {
+  CommonWebGestureToProto(event, InputMessage::Type_GestureFlingCancel, proto);
+
+  GestureFlingCancel* details = proto->mutable_gesture_fling_cancel();
+  details->set_prevent_boosting(event.data.flingCancel.preventBoosting);
+}
+
+void GestureTapToProto(const blink::WebGestureEvent& event,
+                       InputMessage* proto) {
+  CommonWebGestureToProto(event, InputMessage::Type_GestureTap, proto);
+
+  GestureTap* details = proto->mutable_gesture_tap();
+  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) {
+  CommonWebGestureToProto(event, InputMessage::Type_GesturePinchBegin, proto);
+}
+
+void GesturePinchEndToProto(const blink::WebGestureEvent& event,
+                            InputMessage* proto) {
+  CommonWebGestureToProto(event, InputMessage::Type_GesturePinchEnd, proto);
+}
+
+void GesturePinchUpdateToProto(const blink::WebGestureEvent& event,
+                               InputMessage* proto) {
+  CommonWebGestureToProto(event, InputMessage::Type_GesturePinchUpdate, proto);
+
+  GesturePinchUpdate* details = proto->mutable_gesture_pinch_update();
+  details->set_zoom_disabled(event.data.pinchUpdate.zoomDisabled);
+  details->set_scale(event.data.pinchUpdate.scale);
+}
+
+}  // namespace
+
+InputMessageGenerator::InputMessageGenerator() {}
+
+InputMessageGenerator::~InputMessageGenerator() {}
+
+scoped_ptr<BlimpMessage> InputMessageGenerator::GenerateMessage(
+    const blink::WebInputEvent& event) {
+  scoped_ptr<BlimpMessage> message(new BlimpMessage);
+  message->set_type(BlimpMessage::INPUT);
+  InputMessage* details = message->mutable_input();
+
+  switch (event.type) {
+    case blink::WebInputEvent::Type::GestureScrollBegin:
+      GestureScrollBeginToProto(
+          static_cast<const blink::WebGestureEvent&>(event),
+          details);
+      break;
+    case blink::WebInputEvent::Type::GestureScrollEnd:
+      GestureScrollEndToProto(static_cast<const blink::WebGestureEvent&>(event),
+                              details);
+      break;
+    case blink::WebInputEvent::Type::GestureScrollUpdate:
+      GestureScrollUpdateToProto(
+          static_cast<const blink::WebGestureEvent&>(event),
+          details);
+      break;
+    case blink::WebInputEvent::Type::GestureFlingStart:
+      GestureFlingStartToProto(
+          static_cast<const blink::WebGestureEvent&>(event),
+          details);
+      break;
+    case blink::WebInputEvent::Type::GestureFlingCancel:
+      GestureFlingCancelToProto(
+          static_cast<const blink::WebGestureEvent&>(event),
+          details);
+      break;
+    case blink::WebInputEvent::Type::GestureTap:
+      GestureTapToProto(static_cast<const blink::WebGestureEvent&>(event),
+                        details);
+      break;
+    case blink::WebInputEvent::Type::GesturePinchBegin:
+      GesturePinchBeginToProto(
+          static_cast<const blink::WebGestureEvent&>(event),
+          details);
+      break;
+    case blink::WebInputEvent::Type::GesturePinchEnd:
+      GesturePinchEndToProto(static_cast<const blink::WebGestureEvent&>(event),
+                             details);
+      break;
+    case blink::WebInputEvent::Type::GesturePinchUpdate:
+      GesturePinchUpdateToProto(
+          static_cast<const blink::WebGestureEvent&>(event),
+          details);
+      break;
+    // Unsupported types:
+    case blink::WebInputEvent::Type::Undefined:
+    case blink::WebInputEvent::Type::MouseDown:
+    case blink::WebInputEvent::Type::MouseUp:
+    case blink::WebInputEvent::Type::MouseMove:
+    case blink::WebInputEvent::Type::MouseEnter:
+    case blink::WebInputEvent::Type::MouseLeave:
+    case blink::WebInputEvent::Type::ContextMenu:
+    case blink::WebInputEvent::Type::MouseWheel:
+    case blink::WebInputEvent::Type::RawKeyDown:
+    case blink::WebInputEvent::Type::KeyDown:
+    case blink::WebInputEvent::Type::KeyUp:
+    case blink::WebInputEvent::Type::Char:
+    case blink::WebInputEvent::Type::GestureShowPress:
+    case blink::WebInputEvent::Type::GestureTapUnconfirmed:
+    case blink::WebInputEvent::Type::GestureTapDown:
+    case blink::WebInputEvent::Type::GestureTapCancel:
+    case blink::WebInputEvent::Type::GestureDoubleTap:
+    case blink::WebInputEvent::Type::GestureTwoFingerTap:
+    case blink::WebInputEvent::Type::GestureLongPress:
+    case blink::WebInputEvent::Type::GestureLongTap:
+    case blink::WebInputEvent::Type::TouchStart:
+    case blink::WebInputEvent::Type::TouchMove:
+    case blink::WebInputEvent::Type::TouchEnd:
+    case blink::WebInputEvent::Type::TouchCancel:
+      NOTIMPLEMENTED();
+      return nullptr;
+  }
+
+  return message;
+}
+
+}  // namespace blimp