WIP Add getCoalescedEvents API using vector of WebInputEvents

content/common/input/event_with_latency_info.cc

 // Copyright 2016 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 "content/common/input/event_with_latency_info.h"
 
 #include <bitset>
 #include <limits>
 
 using blink::WebGestureEvent;
@@ skipping 244 matching lines @@
   if (event_to_coalesce.type == blink::WebInputEvent::MouseWheel &&
       event->type == blink::WebInputEvent::MouseWheel) {
     Coalesce(static_cast<const blink::WebMouseWheelEvent&>(event_to_coalesce),
              static_cast<blink::WebMouseWheelEvent*>(event));
   }
 }
 
 }  // namespace internal
 
 ScopedWebInputEventWithLatencyInfo::ScopedWebInputEventWithLatencyInfo(
-    ui::ScopedWebInputEvent event,
+    blink::CoalescedWebInputEvent::ScopedWebInputEvent event,
     const ui::LatencyInfo& latency_info)
-    : event_(std::move(event)), latency_(latency_info) {
-}
+    : event_(new blink::CoalescedWebInputEvent(std::move(event))),
+      latency_(latency_info) {}
 
 ScopedWebInputEventWithLatencyInfo::~ScopedWebInputEventWithLatencyInfo() {}
 
 bool ScopedWebInputEventWithLatencyInfo::CanCoalesceWith(
     const ScopedWebInputEventWithLatencyInfo& other) const {
-  return internal::CanCoalesce(other.event(), event());
+  return internal::CanCoalesce(other.coalescedEvent().event(),
+                               coalescedEvent().event());
 }
 
 void ScopedWebInputEventWithLatencyInfo::CoalesceWith(
     const ScopedWebInputEventWithLatencyInfo& other) {
   // |other| should be a newer event than |this|.
   if (other.latency_.trace_id() >= 0 && latency_.trace_id() >= 0)
     DCHECK_GT(other.latency_.trace_id(), latency_.trace_id());
 
   // New events get coalesced into older events, and the newer timestamp
   // should always be preserved.
-  const double time_stamp_seconds = other.event().timeStampSeconds;
-  internal::Coalesce(other.event(), event_.get());
-  event_->timeStampSeconds = time_stamp_seconds;
+  const double time_stamp_seconds =
+      other.coalescedEvent().event().timeStampSeconds;
+
+  // The new event will have no coalesced events itself. So we do not copy all
+  // the coalesced event over here.
+  event_->addCoalescedEvent(other.coalescedEvent().event());
+  internal::Coalesce(other.coalescedEvent().event(), event_->eventPointer());
+  event_->eventPointer()->timeStampSeconds = time_stamp_seconds;
 
   // When coalescing two input events, we keep the oldest LatencyInfo
   // since it will represent the longest latency.
   other.latency_ = latency_;
   other.latency_.set_coalesced();
 }
 
-const blink::WebInputEvent& ScopedWebInputEventWithLatencyInfo::event() const {
+const blink::CoalescedWebInputEvent&
+ScopedWebInputEventWithLatencyInfo::coalescedEvent() const {
   return *event_;
 }
 
-blink::WebInputEvent& ScopedWebInputEventWithLatencyInfo::event() {
+blink::CoalescedWebInputEvent&
+ScopedWebInputEventWithLatencyInfo::coalescedEvent() {
   return *event_;
 }
 
 }  // namespace content