src/content/port/browser/event_with_latency_info.h

   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.
   4
   5 #ifndef CONTENT_PORT_BROWSER_EVENT_WITH_LATENCY_INFO_H_
   6 #define CONTENT_PORT_BROWSER_EVENT_WITH_LATENCY_INFO_H_
   7
   8 #include "ui/events/latency_info.h"
   9
  10 #include "content/common/input/web_input_event_traits.h"
  11
  12 namespace WebKit {
  13 class WebGestureEvent;
  14 class WebMouseEvent;
  15 class WebMouseWheelEvent;
  16 class WebTouchEvent;
  17 }
  18
  19 namespace content {
  20
  21 template <typename T>
  22 class EventWithLatencyInfo {
  23  public:
  24   T event;
  25   ui::LatencyInfo latency;
  26
  27   EventWithLatencyInfo(const T& e, const ui::LatencyInfo& l)
  28       : event(e), latency(l) {}
  29
  30   EventWithLatencyInfo() {}
  31
  32   bool CanCoalesceWith(const EventWithLatencyInfo& other)
  33       const WARN_UNUSED_RESULT {
  34     return WebInputEventTraits::CanCoalesce(other.event, event);
  35   }
  36
  37   void CoalesceWith(const EventWithLatencyInfo& other) {
  38     WebInputEventTraits::Coalesce(other.event, &event);
  39     latency.MergeWith(other.latency);
  40   }
  41 };
  42
  43 typedef EventWithLatencyInfo<WebKit::WebGestureEvent>
  44     GestureEventWithLatencyInfo;
  45 typedef EventWithLatencyInfo<WebKit::WebMouseWheelEvent>
  46     MouseWheelEventWithLatencyInfo;
  47 typedef EventWithLatencyInfo<WebKit::WebMouseEvent>
  48     MouseEventWithLatencyInfo;
  49 typedef EventWithLatencyInfo<WebKit::WebTouchEvent>
  50     TouchEventWithLatencyInfo;
  51
  52 }  // namespace content
  53
  54 #endif  // CONTENT_PORT_BROWSER_EVENT_WITH_LATENCY_INFO_H_