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// Copyright (c) 2015 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/browser/media/capture/window_activity_tracker_aura.h"
#include "base/logging.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/events/event_utils.h"
namespace content {
namespace {
// The time period within which a triggered UI event is considered
// currently active.
const int kTimePeriodUiEventMicros = 100000; // 100 ms
// Minimum number of user interactions before we consider the user to be in
// interactive mode. The goal is to prevent user interactions to launch
// animated content from causing target playout time flip-flop.
const int kMinUserInteractions = 5;
} // namespace
WindowActivityTrackerAura::WindowActivityTrackerAura(aura::Window* window)
: window_(window),
last_time_ui_event_detected_(base::TimeTicks()),
ui_events_count_(0),
weak_factory_(this) {
if (window_) {
window_->AddObserver(this);
window_->AddPreTargetHandler(this);
}
}
WindowActivityTrackerAura::~WindowActivityTrackerAura() {
if (window_) {
window_->RemoveObserver(this);
window_->RemovePreTargetHandler(this);
}
}
base::WeakPtr<WindowActivityTracker> WindowActivityTrackerAura::GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
bool WindowActivityTrackerAura::IsUiInteractionActive() const {
return ui_events_count_ > kMinUserInteractions;
}
void WindowActivityTrackerAura::RegisterMouseInteractionObserver(
const base::Closure& observer) {
mouse_interaction_observer_ = observer;
}
void WindowActivityTrackerAura::Reset() {
ui_events_count_ = 0;
last_time_ui_event_detected_ = base::TimeTicks();
}
void WindowActivityTrackerAura::OnEvent(ui::Event* event) {
if (!mouse_interaction_observer_.is_null() && event->IsMouseEvent())
mouse_interaction_observer_.Run();
if (base::TimeTicks::Now() - last_time_ui_event_detected_ >
base::TimeDelta::FromMicroseconds(kTimePeriodUiEventMicros)) {
ui_events_count_++;
}
last_time_ui_event_detected_ = base::TimeTicks::Now();
}
void WindowActivityTrackerAura::OnWindowDestroying(aura::Window* window) {
DCHECK_EQ(window_, window);
window_->RemovePreTargetHandler(this);
window_->RemoveObserver(this);
window_ = nullptr;
}
} // namespace content
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