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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/shelf/home_button_controller.h"
#include "ash/app_list/app_list_controller_impl.h"
#include "ash/assistant/model/assistant_ui_model.h"
#include "ash/capture_mode/capture_mode_controller.h"
#include "ash/public/cpp/assistant/controller/assistant_ui_controller.h"
#include "ash/root_window_controller.h"
#include "ash/scanner/scanner_metrics.h"
#include "ash/shelf/home_button.h"
#include "ash/shelf/home_button_tap_overlay.h"
#include "ash/shelf/shelf_button.h"
#include "ash/shell.h"
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/user_metrics.h"
#include "base/metrics/user_metrics_action.h"
#include "chromeos/constants/chromeos_features.h"
#include "components/account_id/account_id.h"
#include "ui/display/screen.h"
#include "ui/display/tablet_state.h"
#include "ui/views/animation/ink_drop.h"
#include "ui/views/animation/ink_drop_state.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace {
constexpr base::TimeDelta kAssistantAnimationDelay = base::Milliseconds(200);
} // namespace
HomeButtonController::HomeButtonController(HomeButton* button)
: button_(button) {
DCHECK(button_);
InitializeAssistantOverlay();
DCHECK(tap_overlay_);
Shell* shell = Shell::Get();
sunfish_scanner_feature_observation_.Observe(
shell->sunfish_scanner_feature_watcher());
shell->app_list_controller()->AddObserver(this);
AssistantUiController::Get()->GetModel()->AddObserver(this);
AssistantState::Get()->AddObserver(this);
}
HomeButtonController::~HomeButtonController() {
Shell* shell = Shell::Get();
// AppListController are destroyed early when Shel is being destroyed, so they
// may not exist.
if (AssistantUiController::Get())
AssistantUiController::Get()->GetModel()->RemoveObserver(this);
if (shell->app_list_controller())
shell->app_list_controller()->RemoveObserver(this);
if (AssistantState::Get())
AssistantState::Get()->RemoveObserver(this);
}
bool HomeButtonController::MaybeHandleGestureEvent(ui::GestureEvent* event) {
switch (event->type()) {
case ui::EventType::kGestureTap:
case ui::EventType::kGestureTapCancel:
// Unconditionally stop the animation, even if Assistant / Sunfish/Scanner
// is not currently available - because the animation could have been
// started when they _were_ available.
// These are no-ops if the animation did not start.
tap_overlay_->EndAnimation();
tap_animation_delay_timer_->Stop();
// After animating the ripple, let the button handle the event.
return false;
case ui::EventType::kGestureTapDown:
if (IsAssistantAvailable() || IsSunfishOrScannerAvailable()) {
tap_animation_delay_timer_->Start(
FROM_HERE, kAssistantAnimationDelay,
base::BindOnce(&HomeButtonController::StartAssistantAnimation,
base::Unretained(this)));
}
return false;
case ui::EventType::kGestureLongPress:
// Only consume the long press event if Assistant / Sunfish/Scanner is
// available.
//
// Update Sunfish/Scanner feature state in case it is stale.
sunfish_scanner_feature_observation_.GetSource()->UpdateFeatureStates();
if (IsSunfishOrScannerAvailable()) {
tap_overlay_->BurstAnimation();
event->SetHandled();
RecordScannerFeatureUserState(
ScannerFeatureUserState::
kSunfishSessionStartedFromHomeButtonLongPress);
CaptureModeController::Get()->StartSunfishSession();
return true;
}
if (IsAssistantAvailable()) {
base::RecordAction(base::UserMetricsAction(
"VoiceInteraction.Started.HomeButtonLongPress"));
tap_overlay_->BurstAnimation();
event->SetHandled();
Shell::SetRootWindowForNewWindows(
button_->GetWidget()->GetNativeWindow()->GetRootWindow());
AssistantUiController::Get()->ShowUi(
AssistantEntryPoint::kLongPressLauncher);
return true;
}
return false;
case ui::EventType::kGestureLongTap:
// Only consume the long tap event if Assistant / Sunfish/Scanner is
// available.
if (!(IsAssistantAvailable() || IsSunfishOrScannerAvailable())) {
return false;
}
// We already handled the long press; consume the long tap to avoid
// bringing up the context menu again.
event->SetHandled();
return true;
default:
return false;
}
}
bool HomeButtonController::IsLongPressActionAvailable() {
return IsAssistantAvailable() || IsSunfishOrScannerAvailable();
}
bool HomeButtonController::IsAssistantVisible() {
return AssistantUiController::Get()->GetModel()->visibility() ==
AssistantVisibility::kVisible;
}
bool HomeButtonController::IsAssistantAvailable() {
AssistantStateBase* state = AssistantState::Get();
return state->allowed_state() == assistant::AssistantAllowedState::ALLOWED &&
state->settings_enabled().value_or(false);
}
bool HomeButtonController::IsSunfishOrScannerAvailable() const {
return sunfish_scanner_feature_observation_.GetSource()
->CanShowSunfishOrScannerUi();
}
void HomeButtonController::OnAppListVisibilityWillChange(bool shown,
int64_t display_id) {
if (button_->GetDisplayId() != display_id)
return;
if (shown)
OnAppListShown();
else
OnAppListDismissed();
}
void HomeButtonController::OnDisplayTabletStateChanged(
display::TabletState state) {
if (state != display::TabletState::kInTabletMode) {
return;
}
}
void HomeButtonController::OnAssistantFeatureAllowedChanged(
assistant::AssistantAllowedState state) {
button_->OnIconUpdated();
}
void HomeButtonController::OnAssistantSettingsEnabled(bool enabled) {
button_->OnIconUpdated();
}
void HomeButtonController::OnUiVisibilityChanged(
AssistantVisibility new_visibility,
AssistantVisibility old_visibility,
std::optional<AssistantEntryPoint> entry_point,
std::optional<AssistantExitPoint> exit_point) {
button_->OnIconUpdated();
}
void HomeButtonController::OnSunfishScannerFeatureStatesChanged(
SunfishScannerFeatureWatcher& source) {
button_->OnIconUpdated();
}
void HomeButtonController::StartAssistantAnimation() {
tap_overlay_->StartAnimation();
}
void HomeButtonController::OnAppListShown() {
// Do not show the button as toggled in tablet mode, since the home screen
// view is always open in the background.
if (!Shell::Get()->IsInTabletMode()) {
button_->SetToggled(true);
}
button_->UpdateTooltipText();
}
void HomeButtonController::OnAppListDismissed() {
button_->SetToggled(false);
button_->UpdateTooltipText();
}
void HomeButtonController::InitializeAssistantOverlay() {
DCHECK_EQ(nullptr, tap_overlay_);
tap_overlay_ = new HomeButtonTapOverlay(button_);
button_->AddChildViewRaw(tap_overlay_.get());
tap_overlay_->SetVisible(false);
tap_animation_delay_timer_ = std::make_unique<base::OneShotTimer>();
}
} // namespace ash
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