1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_BROWSER_RENDERER_HOST_EVENT_WITH_LATENCY_INFO_H_
6 #define CONTENT_BROWSER_RENDERER_HOST_EVENT_WITH_LATENCY_INFO_H_
8 #include "ui/events/latency_info.h"
10 #include "content/common/input/web_input_event_traits.h"
11 #include "content/public/browser/native_web_keyboard_event.h"
14 class WebGestureEvent
;
16 class WebMouseWheelEvent
;
23 class EventWithLatencyInfo
{
26 mutable ui::LatencyInfo latency
;
28 explicit EventWithLatencyInfo(const T
& e
) : event(e
) {}
30 EventWithLatencyInfo(const T
& e
, const ui::LatencyInfo
& l
)
31 : event(e
), latency(l
) {}
33 EventWithLatencyInfo() {}
35 bool CanCoalesceWith(const EventWithLatencyInfo
& other
)
36 const WARN_UNUSED_RESULT
{
37 return WebInputEventTraits::CanCoalesce(other
.event
, event
);
40 void CoalesceWith(const EventWithLatencyInfo
& other
) {
41 WebInputEventTraits::Coalesce(other
.event
, &event
);
42 // When coalescing two input events, we keep the oldest LatencyInfo
43 // for Telemetry latency test since it will represent the longest
45 if (other
.latency
.trace_id() >= 0 &&
46 (latency
.trace_id() < 0 ||
47 other
.latency
.trace_id() < latency
.trace_id()))
48 latency
= other
.latency
;
52 typedef EventWithLatencyInfo
<NativeWebKeyboardEvent
>
53 NativeWebKeyboardEventWithLatencyInfo
;
54 typedef EventWithLatencyInfo
<blink::WebGestureEvent
>
55 GestureEventWithLatencyInfo
;
56 typedef EventWithLatencyInfo
<blink::WebMouseWheelEvent
>
57 MouseWheelEventWithLatencyInfo
;
58 typedef EventWithLatencyInfo
<blink::WebMouseEvent
>
59 MouseEventWithLatencyInfo
;
60 typedef EventWithLatencyInfo
<blink::WebTouchEvent
>
61 TouchEventWithLatencyInfo
;
63 } // namespace content
65 #endif // CONTENT_BROWSER_RENDERER_HOST_EVENT_WITH_LATENCY_INFO_H_