1// Copyright 2014 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 UI_EVENTS_OZONE_EVENTS_OZONE_H_
6#define UI_EVENTS_OZONE_EVENTS_OZONE_H_
7
8#include "base/callback.h"
9#include "base/event_types.h"
10#include "ui/events/events_export.h"
11
12namespace ui {
13
14class Event;
15
16// Wrap a "native" ui::Event in another ui::Event & dispatch it.
17//
18// This is really unfortunate, but exists for two reasons:
19//
20//   1. Some of the ui::Event constructors depend on global state that
21//   is only used when building from a "native" event. For example:
22//   last_click_event_ is used when constructing MouseEvent from
23//   NativeEvent to determine click count.
24//
25//   2. Events contain a reference to a "native event", which some code
26//   depends on. The ui::Event might get mutated during dispatch, but
27//   the native event won't. Some code depends on the fact that the
28//   "native" version of the event is unmodified.
29//
30// We are trying to fix both of these issues, but in the meantime we
31// define NativeEvent == ui::Event.
32//
33EVENTS_EXPORT void DispatchEventFromNativeUiEvent(
34    const base::NativeEvent& native_event,
35    base::Callback<void(ui::Event*)> callback);
36
37}  // namespace ui
38
39#endif  // UI_EVENTS_OZONE_EVENTS_OZONE_H_
40