chromium/content/browser/scheduler/responsiveness/native_event_observer.cc

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Needed for BUILDFLAG(IS_WIN)
#include "build/build_config.h"

// Windows headers must come first.
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#endif

// Proceed with header includes in usual order.
#include "content/browser/scheduler/responsiveness/native_event_observer.h"

#include "ui/events/platform/platform_event_source.h"

#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include "ui/aura/env.h"
#include "ui/events/event.h"
#endif

#if BUILDFLAG(IS_WIN)
#include "base/task/current_thread.h"
#endif

namespace content {
namespace responsiveness {

NativeEventObserver::NativeEventObserver(
    WillRunEventCallback will_run_event_callback,
    DidRunEventCallback did_run_event_callback)
    : … { … }

NativeEventObserver::~NativeEventObserver() { … }

#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
void NativeEventObserver::RegisterObserver() { … }
void NativeEventObserver::DeregisterObserver() { … }

void NativeEventObserver::OnWindowEventDispatcherStartedProcessing(
    aura::WindowEventDispatcher* dispatcher,
    const ui::Event& event) { … }

void NativeEventObserver::OnWindowEventDispatcherFinishedProcessingEvent(
    aura::WindowEventDispatcher* dispatcher) { … }
#endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)

#if BUILDFLAG(IS_WIN)
void NativeEventObserver::RegisterObserver() {
  base::CurrentUIThread::Get()->AddMessagePumpObserver(this);
}
void NativeEventObserver::DeregisterObserver() {
  base::CurrentUIThread::Get()->RemoveMessagePumpObserver(this);
}
void NativeEventObserver::WillDispatchMSG(const MSG& msg) {
  will_run_event_callback_.Run(&msg);
}
void NativeEventObserver::DidDispatchMSG(const MSG& msg) {
  did_run_event_callback_.Run(&msg);
}
#endif  // BUILDFLAG(IS_WIN)

#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_FUCHSIA) || BUILDFLAG(IS_IOS)
void NativeEventObserver::RegisterObserver() {}
void NativeEventObserver::DeregisterObserver() {}
#endif  // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_FUCHSIA)

}  // namespace responsiveness
}  // namespace content