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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/game_mode/game_mode_controller.h"
#include "ash/public/cpp/window_properties.h"
#include "ash/shell.h"
#include "base/metrics/histogram_functions.h"
#include "base/time/time.h"
#include "chromeos/ash/components/borealis/borealis_util.h"
#include "chromeos/ash/components/dbus/resourced/resourced_client.h"
#include "chromeos/ash/experiences/arc/arc_util.h"
#include "ui/views/widget/widget.h"
namespace game_mode {
namespace {
constexpr int kRefreshSec = 60;
constexpr int kTimeoutSec = kRefreshSec + 10;
} // namespace
GameModeController::GameModeController() {
if (!ash::Shell::HasInstance())
return;
aura::client::FocusClient* focus_client =
aura::client::GetFocusClient(ash::Shell::GetPrimaryRootWindow());
focus_client->AddObserver(this);
// In case a window is already focused when this is constructed.
OnWindowFocused(focus_client->GetFocusedWindow(), nullptr);
}
GameModeController::~GameModeController() {
if (ash::Shell::HasInstance())
aura::client::GetFocusClient(ash::Shell::GetPrimaryRootWindow())
->RemoveObserver(this);
}
void GameModeController::OnWindowFocused(aura::Window* gained_focus,
aura::Window* lost_focus) {
auto maybe_keep_focused = std::move(focused_);
if (!gained_focus)
return;
auto* widget = views::Widget::GetTopLevelWidgetForNativeView(gained_focus);
// |widget| can be nullptr in tests.
if (!widget)
return;
aura::Window* window = widget->GetNativeWindow();
auto* window_state = ash::WindowState::Get(window);
if (!window_state)
return;
if (ash::borealis::IsBorealisWindow(window)) {
focused_ = std::make_unique<WindowTracker>(
window_state, std::move(maybe_keep_focused),
base::BindRepeating(
&GameModeController::NotifySetGameMode,
// This is safe because the callback is only used by WindowTracker
// and GameModeEnabler, which are owned by (or transitively owned
// by) GameModeController. Therefore |this| cannot be stale.
base::Unretained(this)));
}
}
GameModeController::WindowTracker::WindowTracker(
ash::WindowState* window_state,
std::unique_ptr<WindowTracker> previous_focus,
NotifySetGameModeCallback notify_set_game_mode_callback)
: notify_set_game_mode_callback_(notify_set_game_mode_callback) {
auto* window = window_state->window();
// Maintain game mode state without dropping momentarily out of it
// when switching between full-screen game windows.
if (previous_focus) {
// Enabler will be null if game mode is not on before focus switch.
game_mode_enabler_ = std::move(previous_focus->game_mode_enabler_);
}
window_state_observer_.Observe(window_state);
window_observer_.Observe(window);
// If maintaining game mode state, update the window reference on the reused
// enabler. Must occur after observers are setup.
if (game_mode_enabler_) {
game_mode_enabler_->SetWindowState(window_state);
}
// This possibly turns OFF as well as turns on game mode.
UpdateGameModeStatus(window_state);
}
GameModeController::WindowTracker::~WindowTracker() {}
void GameModeController::WindowTracker::OnPostWindowStateTypeChange(
ash::WindowState* window_state,
chromeos::WindowStateType old_type) {
UpdateGameModeStatus(window_state);
}
void GameModeController::WindowTracker::UpdateGameModeStatus(
ash::WindowState* window_state) {
auto* window = window_state->window();
CHECK(ash::borealis::IsBorealisWindow(window));
if (!window_state->IsFullscreen()) {
game_mode_enabler_.reset();
return;
}
if (game_mode_enabler_) {
// No need to create a new enabler. The existing one is already valid for
// this window.
return;
}
VLOG(2) << "Initializing GameModeEnabler for Borealis";
// Borealis has no further criteria than the window being fullscreen and
// focused, already guaranteed by WindowTracker existing.
DCHECK_EQ(window_state, window_state_observer_.GetSource());
game_mode_enabler_ = std::make_unique<GameModeEnabler>(
window_state, notify_set_game_mode_callback_);
}
void GameModeController::WindowTracker::OnWindowDestroying(
aura::Window* window) {
window_state_observer_.Reset();
window_observer_.Reset();
game_mode_enabler_.reset();
}
bool GameModeController::GameModeEnabler::should_record_failure;
GameModeController::GameModeEnabler::GameModeEnabler(
ash::WindowState* window_state,
NotifySetGameModeCallback notify_set_game_mode_callback)
: window_state_(window_state),
notify_set_game_mode_callback_(notify_set_game_mode_callback) {
notify_set_game_mode_callback_.Run(GameMode::BOREALIS, window_state_);
GameModeEnabler::should_record_failure = true;
base::UmaHistogramEnumeration(kGameModeResultHistogramName,
GameModeResult::kAttempted);
if (ash::ResourcedClient::Get()) {
ash::ResourcedClient::Get()->SetGameModeWithTimeout(
GameMode::BOREALIS, kTimeoutSec,
base::BindOnce(&GameModeEnabler::OnSetGameMode,
/*refresh_of=*/std::nullopt));
}
timer_.Start(FROM_HERE, base::Seconds(kRefreshSec), this,
&GameModeEnabler::RefreshGameMode);
}
GameModeController::GameModeEnabler::~GameModeEnabler() {
auto time_in_mode = began_.Elapsed();
base::UmaHistogramLongTimes100(kTimeInGameModeHistogramName, time_in_mode);
notify_set_game_mode_callback_.Run(GameMode::OFF, window_state_);
timer_.Stop();
VLOG(1) << "Turning off game mode";
if (ash::ResourcedClient::Get()) {
ash::ResourcedClient::Get()->SetGameModeWithTimeout(
GameMode::OFF, 0,
base::BindOnce(&GameModeEnabler::OnSetGameMode, GameMode::BOREALIS));
}
}
void GameModeController::GameModeEnabler::SetWindowState(
ash::WindowState* window_state) {
if (window_state_ == window_state) {
return;
}
window_state_ = window_state;
notify_set_game_mode_callback_.Run(GameMode::BOREALIS, window_state_);
}
void GameModeController::GameModeEnabler::RefreshGameMode() {
if (ash::ResourcedClient::Get()) {
ash::ResourcedClient::Get()->SetGameModeWithTimeout(
GameMode::BOREALIS, kTimeoutSec,
base::BindOnce(&GameModeEnabler::OnSetGameMode, GameMode::BOREALIS));
}
}
// Previous is whether game mode was enabled previous to this call.
void GameModeController::GameModeEnabler::OnSetGameMode(
std::optional<GameMode> refresh_of,
std::optional<GameMode> previous) {
if (!previous.has_value()) {
LOG(ERROR) << "Failed to set Game Mode";
} else if (GameModeEnabler::should_record_failure && refresh_of.has_value() &&
previous.value() != refresh_of.value()) {
// If game mode was not on and it was not the initial call,
// it means the previous call failed/timed out.
base::UmaHistogramEnumeration(kGameModeResultHistogramName,
GameModeResult::kFailed);
// Only record failures once per entry into game mode.
GameModeEnabler::should_record_failure = false;
}
}
void GameModeController::NotifySetGameMode(GameMode game_mode,
ash::WindowState* window_state) {
if (!callback_.is_null()) {
callback_.Run(window_state->window(), game_mode);
}
}
} // namespace game_mode
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