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 241 matching lines @@
              static_cast<blink::WebTouchEvent*>(event));
     return;
   }
   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));
   }
 }
 
+ui::ScopedWebInputEvent makeDeepCopyUniquePtr(
+    const blink::WebInputEvent& event) {
+  if (blink::WebInputEvent::isGestureEventType(event.type)) {
+    return ui::ScopedWebInputEvent(new blink::WebGestureEvent(
+        static_cast<const blink::WebGestureEvent&>(event)));
+  }
+  if (blink::WebInputEvent::isMouseEventType(event.type)) {
+    return ui::ScopedWebInputEvent(new blink::WebMouseEvent(
+        static_cast<const blink::WebMouseEvent&>(event)));
+  }
+  if (blink::WebInputEvent::isTouchEventType(event.type)) {
+    return ui::ScopedWebInputEvent(new blink::WebTouchEvent(
+        static_cast<const blink::WebTouchEvent&>(event)));
+  }
+  if (event.type == blink::WebInputEvent::MouseWheel) {
+    return ui::ScopedWebInputEvent(new blink::WebMouseWheelEvent(
+        static_cast<const blink::WebMouseWheelEvent&>(event)));
+  }
+  NOTREACHED();
+  return ui::ScopedWebInputEvent();
+}
+
 }  // namespace internal
 
 ScopedWebInputEventWithLatencyInfo::ScopedWebInputEventWithLatencyInfo(
     ui::ScopedWebInputEvent event,
     const ui::LatencyInfo& latency_info)
-    : event_(std::move(event)), latency_(latency_info) {
+    : event_(internal::makeDeepCopyUniquePtr(*event.get())),
+      latency_(latency_info) {
+  scopedCoalescedEvents_.push_back(std::move(event));
+  coalescedEvents_.push_back(scopedCoalescedEvents_.back().get());
 }
 
 ScopedWebInputEventWithLatencyInfo::~ScopedWebInputEventWithLatencyInfo() {}
 
 bool ScopedWebInputEventWithLatencyInfo::CanCoalesceWith(
     const ScopedWebInputEventWithLatencyInfo& other) const {
   return internal::CanCoalesce(other.event(), 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;
+  scopedCoalescedEvents_.push_back(
+      internal::makeDeepCopyUniquePtr(other.event()));
+  coalescedEvents_.push_back(scopedCoalescedEvents_.back().get());
   internal::Coalesce(other.event(), event_.get());
   event_->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 {
   return *event_;
 }
 
 blink::WebInputEvent& ScopedWebInputEventWithLatencyInfo::event() {
   return *event_;
 }
 
+const std::vector<const blink::WebInputEvent*>&
+ScopedWebInputEventWithLatencyInfo::coalescedEvents() {
+  return coalescedEvents_;
+}
+
 }  // namespace content