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shelf_layout_manager.cc
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shelf_layout_manager.cc
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// Copyright (c) 2012 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 "ash/shelf/shelf_layout_manager.h"
#include <algorithm>
#include <cmath>
#include <vector>
#include "ash/accessibility/accessibility_controller_impl.h"
#include "ash/animation/animation_change_type.h"
#include "ash/app_list/app_list_controller_impl.h"
#include "ash/app_list/app_list_metrics.h"
#include "ash/app_list/views/app_list_view.h"
#include "ash/display/screen_orientation_controller.h"
#include "ash/home_screen/home_launcher_gesture_handler.h"
#include "ash/home_screen/home_screen_controller.h"
#include "ash/public/cpp/app_list/app_list_types.h"
#include "ash/public/cpp/ash_features.h"
#include "ash/public/cpp/ash_pref_names.h"
#include "ash/public/cpp/presentation_time_recorder.h"
#include "ash/public/cpp/shelf_config.h"
#include "ash/public/cpp/shelf_types.h"
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/root_window_controller.h"
#include "ash/screen_util.h"
#include "ash/session/session_controller_impl.h"
#include "ash/shelf/contextual_tooltip.h"
#include "ash/shelf/drag_handle.h"
#include "ash/shelf/home_to_overview_nudge_controller.h"
#include "ash/shelf/hotseat_widget.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_layout_manager_observer.h"
#include "ash/shelf/shelf_metrics.h"
#include "ash/shelf/shelf_navigation_widget.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/system/locale/locale_update_controller_impl.h"
#include "ash/system/status_area_widget.h"
#include "ash/wallpaper/wallpaper_controller_impl.h"
#include "ash/wm/fullscreen_window_finder.h"
#include "ash/wm/lock_state_controller.h"
#include "ash/wm/mru_window_tracker.h"
#include "ash/wm/overview/overview_controller.h"
#include "ash/wm/screen_pinning_controller.h"
#include "ash/wm/splitview/split_view_controller.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_util.h"
#include "ash/wm/work_area_insets.h"
#include "ash/wm/workspace/workspace_types.h"
#include "ash/wm/workspace_controller.h"
#include "base/auto_reset.h"
#include "base/command_line.h"
#include "base/i18n/rtl.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/metrics/histogram_macros.h"
#include "chromeos/constants/chromeos_features.h"
#include "chromeos/constants/chromeos_switches.h"
#include "components/prefs/pref_service.h"
#include "ui/base/hit_test.h"
#include "ui/base/ui_base_switches.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/compositor/layer_animator.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "ui/events/android/gesture_event_type.h"
#include "ui/events/event.h"
#include "ui/events/event_handler.h"
#include "ui/events/gesture_event_details.h"
#include "ui/events/types/event_type.h"
#include "ui/message_center/message_center.h"
#include "ui/views/border.h"
#include "ui/views/widget/widget.h"
#include "ui/wm/core/coordinate_conversion.h"
#include "ui/wm/public/activation_client.h"
namespace ash {
namespace {
// Default Target Dim Opacity for floating shelf.
constexpr float kFloatingShelfDimOpacity = 0.74f;
// Target Dim Opacity for shelf when shelf is in the maximized state.
constexpr float kMaximizedShelfDimOpacity = 0.6f;
// Default opacity for shelf without dimming.
constexpr float kDefaultShelfOpacity = 1.0f;
// Delay before showing the shelf. This is after the mouse stops moving.
constexpr int kAutoHideDelayMS = 200;
// To avoid hiding the shelf when the mouse transitions from a message bubble
// into the shelf, the hit test area is enlarged by this amount of pixels to
// keep the shelf from hiding.
constexpr int kNotificationBubbleGapHeight = 6;
// The maximum size of the region on the display opposing the shelf managed by
// this ShelfLayoutManager which can trigger showing the shelf.
// For instance:
// - Primary display is left of secondary display.
// - Shelf is left aligned
// - This ShelfLayoutManager manages the shelf for the secondary display.
// |kMaxAutoHideShowShelfRegionSize| refers to the maximum size of the region
// from the right edge of the primary display which can trigger showing the
// auto hidden shelf. The region is used to make it easier to trigger showing
// the auto hidden shelf when the shelf is on the boundary between displays.
constexpr int kMaxAutoHideShowShelfRegionSize = 10;
ui::Layer* GetLayer(views::Widget* widget) {
return widget->GetNativeView()->layer();
}
void SetupAnimator(ui::ScopedLayerAnimationSettings* animation_setter,
base::TimeDelta animation_duration,
gfx::Tween::Type type,
ui::AnimationMetricsReporter* animation_metrics_reporter) {
animation_setter->SetTransitionDuration(animation_duration);
if (!animation_duration.is_zero()) {
animation_setter->SetTweenType(type);
animation_setter->SetPreemptionStrategy(
ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
if (animation_metrics_reporter)
animation_setter->SetAnimationMetricsReporter(animation_metrics_reporter);
}
}
void AnimateOpacity(views::Widget* widget,
float target_opacity,
base::TimeDelta animation_duration,
gfx::Tween::Type type,
ui::AnimationMetricsReporter* animation_metrics_reporter) {
ui::ScopedLayerAnimationSettings animation_setter(
GetLayer(widget)->GetAnimator());
SetupAnimator(&animation_setter, animation_duration, type,
animation_metrics_reporter);
GetLayer(widget)->SetOpacity(target_opacity);
}
// Returns true if the window is in the app list window container.
bool IsAppListWindow(const aura::Window* window) {
const aura::Window* parent = window->parent();
return parent && parent->id() == kShellWindowId_AppListContainer;
}
bool IsHotseatEnabled() {
return Shell::Get()->IsInTabletMode() &&
chromeos::switches::ShouldShowShelfHotseat();
}
int GetOffset(int offset, bool from_touchpad) {
PrefService* prefs =
Shell::Get()->session_controller()->GetLastActiveUserPrefService();
if (from_touchpad)
return prefs->GetBoolean(prefs::kNaturalScroll) ? -offset : offset;
return prefs->GetBoolean(prefs::kMouseReverseScroll) ? -offset : offset;
}
// Returns HomeLauncherGestureHandler mode that should be used to handle shelf
// gestures.
ash::HomeLauncherGestureHandler::Mode
GetHomeLauncherGestureHandlerModeForDrag() {
if (features::IsDragFromShelfToHomeOrOverviewEnabled() &&
IsHotseatEnabled() && Shell::Get()->home_screen_controller() &&
Shell::Get()->home_screen_controller()->IsHomeScreenVisible() &&
Shell::Get()->overview_controller() &&
!Shell::Get()->overview_controller()->InOverviewSession()) {
return HomeLauncherGestureHandler::Mode::kSwipeHomeToOverview;
}
return HomeLauncherGestureHandler::Mode::kSlideUpToShow;
}
// Returns the |WorkspaceWindowState| of the currently active desk on the root
// window of |shelf_window|.
WorkspaceWindowState GetShelfWorkspaceWindowState(aura::Window* shelf_window) {
DCHECK(shelf_window);
// Shelf window does not belong to any desk, use the root to get the active
// desk's workspace state.
auto* controller =
GetActiveWorkspaceController(shelf_window->GetRootWindow());
DCHECK(controller);
return controller->GetWindowState();
}
// Returns shelf's work area inset for given |visibility_state| and |size|.
int GetShelfInset(ShelfVisibilityState visibility_state, int size) {
return visibility_state == SHELF_VISIBLE ? size : 0;
}
// Returns the window that can be dragged from shelf into home screen or
// overview at |location_in_screen|. Returns nullptr if there is no such
// window.
aura::Window* GetWindowForDragToHomeOrOverview(
const gfx::Point& location_in_screen) {
if (!Shell::Get()->IsInTabletMode())
return nullptr;
auto mru_windows =
Shell::Get()->mru_window_tracker()->BuildWindowForCycleList(kActiveDesk);
if (mru_windows.empty())
return nullptr;
aura::Window* window = nullptr;
SplitViewController* split_view_controller =
SplitViewController::Get(Shell::GetPrimaryRootWindow());
const bool is_in_splitview = split_view_controller->InSplitViewMode();
const bool is_in_overview =
Shell::Get()->overview_controller()->InOverviewSession();
if (!is_in_splitview && !is_in_overview) {
// If split view mode is not active, use the first MRU window.
window = mru_windows[0];
} else if (is_in_splitview) {
// If split view mode is active, use the event location to decide which
// window should be the dragged window.
aura::Window* left_window = split_view_controller->left_window();
aura::Window* right_window = split_view_controller->right_window();
const int divider_position = split_view_controller->divider_position();
const bool is_landscape = IsCurrentScreenOrientationLandscape();
const bool is_primary = IsCurrentScreenOrientationPrimary();
const gfx::Rect work_area =
screen_util::GetDisplayWorkAreaBoundsInScreenForActiveDeskContainer(
split_view_controller->GetDefaultSnappedWindow());
if (is_landscape) {
if (location_in_screen.x() < work_area.x() + divider_position)
window = is_primary ? left_window : right_window;
else
window = is_primary ? right_window : left_window;
} else {
window = is_primary ? right_window : left_window;
}
}
return window && window->IsVisible() ? window : nullptr;
}
// Calculates the type of hotseat gesture which should be recorded in histogram.
// Returns the null value if no gesture should be recorded.
base::Optional<InAppShelfGestures> CalculateHotseatGestureToRecord(
base::Optional<ShelfWindowDragResult> window_drag_result,
bool transitioned_from_overview_to_home,
HotseatState old_state,
HotseatState current_state) {
if (window_drag_result.has_value() &&
(window_drag_result == ShelfWindowDragResult::kGoToOverviewMode ||
window_drag_result == ShelfWindowDragResult::kGoToSplitviewMode) &&
old_state == HotseatState::kHidden) {
return InAppShelfGestures::kSwipeUpToShow;
}
if (window_drag_result.has_value() &&
window_drag_result == ShelfWindowDragResult::kGoToHomeScreen) {
return InAppShelfGestures::kFlingUpToShowHomeScreen;
}
if (transitioned_from_overview_to_home)
return InAppShelfGestures::kFlingUpToShowHomeScreen;
if (old_state == current_state)
return base::nullopt;
if (current_state == HotseatState::kHidden)
return InAppShelfGestures::kSwipeDownToHide;
if (current_state == HotseatState::kExtended)
return InAppShelfGestures::kSwipeUpToShow;
return base::nullopt;
}
// Forwards gesture events to ShelfLayoutManager to hide the hotseat
// when it is kExtended.
class HotseatEventHandler : public ui::EventHandler,
public ShelfLayoutManagerObserver {
public:
explicit HotseatEventHandler(ShelfLayoutManager* shelf_layout_manager)
: shelf_layout_manager_(shelf_layout_manager) {
shelf_layout_manager_->AddObserver(this);
Shell::Get()->AddPreTargetHandler(this);
}
~HotseatEventHandler() override {
shelf_layout_manager_->RemoveObserver(this);
Shell::Get()->RemovePreTargetHandler(this);
}
// ShelfLayoutManagerObserver:
void OnHotseatStateChanged(HotseatState old_state,
HotseatState new_state) override {
should_forward_event_ = new_state == HotseatState::kExtended;
}
// ui::EventHandler:
void OnGestureEvent(ui::GestureEvent* event) override {
if (!should_forward_event_)
return;
shelf_layout_manager_->ProcessGestureEventOfInAppHotseat(
event, static_cast<aura::Window*>(event->target()));
}
private:
// Whether events should get forwarded to ShelfLayoutManager.
bool should_forward_event_ = false;
ShelfLayoutManager* const shelf_layout_manager_; // unowned.
DISALLOW_COPY_AND_ASSIGN(HotseatEventHandler);
};
} // namespace
ShelfLayoutManager::State::State()
: visibility_state(SHELF_VISIBLE),
auto_hide_state(SHELF_AUTO_HIDE_HIDDEN),
window_state(WorkspaceWindowState::kDefault),
pre_lock_screen_animation_active(false),
session_state(session_manager::SessionState::UNKNOWN) {}
bool ShelfLayoutManager::State::IsAddingSecondaryUser() const {
return session_state == session_manager::SessionState::LOGIN_SECONDARY;
}
bool ShelfLayoutManager::State::IsScreenLocked() const {
return session_state == session_manager::SessionState::LOCKED;
}
bool ShelfLayoutManager::State::IsActiveSessionState() const {
return session_state == session_manager::SessionState::ACTIVE;
}
bool ShelfLayoutManager::State::IsShelfAutoHidden() const {
return visibility_state == SHELF_AUTO_HIDE &&
auto_hide_state == SHELF_AUTO_HIDE_HIDDEN;
}
bool ShelfLayoutManager::State::IsShelfVisible() const {
return visibility_state == SHELF_VISIBLE ||
(visibility_state == SHELF_AUTO_HIDE &&
auto_hide_state == SHELF_AUTO_HIDE_SHOWN);
}
bool ShelfLayoutManager::State::Equals(const State& other) const {
return other.visibility_state == visibility_state &&
(visibility_state != SHELF_AUTO_HIDE ||
other.auto_hide_state == auto_hide_state) &&
other.window_state == window_state &&
other.pre_lock_screen_animation_active ==
pre_lock_screen_animation_active &&
other.session_state == session_state;
}
// ShelfLayoutManager::ScopedSuspendVisibilityUpdate ---------------------------
ShelfLayoutManager::ScopedSuspendWorkAreaUpdate::ScopedSuspendWorkAreaUpdate(
ShelfLayoutManager* manager)
: manager_(manager) {
manager_->SuspendWorkAreaUpdate();
}
ShelfLayoutManager::ScopedSuspendWorkAreaUpdate::
~ScopedSuspendWorkAreaUpdate() {
manager_->ResumeWorkAreaUpdate();
}
// ShelfLayoutManager ----------------------------------------------------------
ShelfLayoutManager::ShelfLayoutManager(ShelfWidget* shelf_widget, Shelf* shelf)
: shelf_widget_(shelf_widget),
shelf_(shelf),
is_background_blur_enabled_(features::IsBackgroundBlurEnabled()) {
DCHECK(shelf_widget_);
DCHECK(shelf_);
}
ShelfLayoutManager::~ShelfLayoutManager() {
// |hotseat_event_handler_| needs to be released before ShelfLayoutManager.
hotseat_event_handler_.reset();
// Ensures that |overview_suspend_work_area_update_| is released before
// ShelfLayoutManager.
overview_suspend_work_area_update_.reset();
for (auto& observer : observers_)
observer.WillDeleteShelfLayoutManager();
display::Screen::GetScreen()->RemoveObserver(this);
auto* shell = Shell::Get();
shell->locale_update_controller()->RemoveObserver(this);
shell->RemoveShellObserver(this);
shell->lock_state_controller()->RemoveObserver(this);
if (shell->app_list_controller())
shell->app_list_controller()->RemoveObserver(this);
if (shell->overview_controller())
shell->overview_controller()->RemoveObserver(this);
}
void ShelfLayoutManager::InitObservers() {
auto* shell = Shell::Get();
shell->AddShellObserver(this);
SplitViewController::Get(shelf_widget_->GetNativeWindow())->AddObserver(this);
ShelfConfig::Get()->AddObserver(this);
Shell::Get()->tablet_mode_controller()->AddObserver(this);
shell->overview_controller()->AddObserver(this);
shell->app_list_controller()->AddObserver(this);
shell->lock_state_controller()->AddObserver(this);
shell->activation_client()->AddObserver(this);
shell->locale_update_controller()->AddObserver(this);
state_.session_state = shell->session_controller()->GetSessionState();
shelf_background_type_ = GetShelfBackgroundType();
wallpaper_controller_observer_.Add(shell->wallpaper_controller());
display::Screen::GetScreen()->AddObserver(this);
message_center::MessageCenter::Get()->AddObserver(this);
// DesksController could be null when virtual desks feature is not enabled.
if (DesksController::Get())
DesksController::Get()->AddObserver(this);
}
void ShelfLayoutManager::PrepareForShutdown() {
// This might get called twice during shell shutdown - once at the beginning,
// and once as part of root window controller shutdown.
if (in_shutdown_)
return;
in_shutdown_ = true;
// Stop observing changes to avoid updating a partially destructed shelf.
Shell::Get()->activation_client()->RemoveObserver(this);
ShelfConfig::Get()->RemoveObserver(this);
Shell::Get()->tablet_mode_controller()->RemoveObserver(this);
// DesksController could be null when virtual desks feature is not enabled.
if (DesksController::Get())
DesksController::Get()->RemoveObserver(this);
SplitViewController::Get(shelf_widget_->GetNativeWindow())
->RemoveObserver(this);
message_center::MessageCenter::Get()->RemoveObserver(this);
}
bool ShelfLayoutManager::IsVisible() const {
// status_area_widget() may be nullptr during the shutdown.
return shelf_widget_->status_area_widget() &&
shelf_widget_->status_area_widget()->IsVisible() &&
state_.IsShelfVisible();
}
gfx::Rect ShelfLayoutManager::GetIdealBounds() const {
const int shelf_size = ShelfConfig::Get()->shelf_size();
aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
gfx::Rect rect(screen_util::GetDisplayBoundsInParent(shelf_window));
return shelf_->SelectValueForShelfAlignment(
gfx::Rect(rect.x(), rect.bottom() - shelf_size, rect.width(), shelf_size),
gfx::Rect(rect.x(), rect.y(), shelf_size, rect.height()),
gfx::Rect(rect.right() - shelf_size, rect.y(), shelf_size,
rect.height()));
}
gfx::Rect ShelfLayoutManager::GetIdealBoundsForWorkAreaCalculation() const {
if (!Shell::Get()->IsInTabletMode() ||
!chromeos::switches::ShouldShowShelfHotseat() ||
state_.session_state != session_manager::SessionState::ACTIVE) {
return GetIdealBounds();
}
// For the work-area calculation in tablet mode, always use in-app shelf
// bounds, because when the shelf is not in-app the UI is either showing
// AppList or Overview, and updating the WorkArea with the new Shelf size
// would cause unnecessary work.
aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
gfx::Rect rect(screen_util::GetDisplayBoundsInParent(shelf_window));
const int in_app_shelf_size = ShelfConfig::Get()->in_app_shelf_size();
rect.set_y(rect.bottom() - in_app_shelf_size);
rect.set_height(in_app_shelf_size);
return rect;
}
void ShelfLayoutManager::LayoutShelf(bool animate) {
// The ShelfWidget may be partially closed (no native widget) during shutdown
// or before it's been fully initialized so skip layout.
if (in_shutdown_ || !shelf_widget_->native_widget())
return;
CalculateTargetBoundsAndUpdateWorkArea();
UpdateBoundsAndOpacity(animate);
// Update insets in ShelfWindowTargeter when shelf bounds change.
for (auto& observer : observers_)
observer.WillChangeVisibilityState(visibility_state());
}
void ShelfLayoutManager::UpdateVisibilityState() {
// Bail out early after shelf is destroyed or visibility update is suspended.
aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
if (in_shutdown_ || !shelf_window || suspend_visibility_update_)
return;
const WorkspaceWindowState window_state =
GetShelfWorkspaceWindowState(shelf_window);
if (shelf_->ShouldHideOnSecondaryDisplay(state_.session_state)) {
// Needed to hide system tray on secondary display.
SetState(SHELF_HIDDEN);
} else if (!state_.IsActiveSessionState()) {
// Needed to show system tray in non active session state.
SetState(SHELF_VISIBLE);
} else if (Shell::Get()->screen_pinning_controller()->IsPinned()) {
SetState(SHELF_HIDDEN);
} else {
// TODO(zelidrag): Verify shelf drag animation still shows on the device
// when we are in ShelfAutoHideBehavior::kAlwaysHidden.
switch (window_state) {
case WorkspaceWindowState::kFullscreen:
if (IsShelfAutoHideForFullscreenMaximized()) {
SetState(SHELF_AUTO_HIDE);
} else if (IsShelfHiddenForFullscreen()) {
SetState(SHELF_HIDDEN);
} else {
// The shelf is sometimes not hidden when in immersive fullscreen.
// Force the shelf to be auto hidden in this case.
SetState(SHELF_AUTO_HIDE);
}
break;
case WorkspaceWindowState::kMaximized:
SetState(IsShelfAutoHideForFullscreenMaximized()
? SHELF_AUTO_HIDE
: CalculateShelfVisibility());
break;
case WorkspaceWindowState::kDefault:
SetState(CalculateShelfVisibility());
break;
}
}
UpdateWorkspaceMask(window_state);
SendA11yAlertForFullscreenWorkspaceState(window_state);
}
void ShelfLayoutManager::UpdateVisibilityStateForBackGesture() {
base::AutoReset<bool> back_gesture(&state_forced_by_back_gesture_, true);
SetState(SHELF_VISIBLE);
LayoutShelf(/*animate=*/true);
}
void ShelfLayoutManager::UpdateAutoHideState() {
ShelfAutoHideState auto_hide_state =
CalculateAutoHideState(state_.visibility_state);
if (auto_hide_state != state_.auto_hide_state) {
if (auto_hide_state == SHELF_AUTO_HIDE_HIDDEN) {
// Hides happen immediately.
SetState(state_.visibility_state);
} else {
if (!auto_hide_timer_.IsRunning()) {
mouse_over_shelf_when_auto_hide_timer_started_ =
shelf_widget_->GetWindowBoundsInScreen().Contains(
display::Screen::GetScreen()->GetCursorScreenPoint());
}
StartAutoHideTimer();
}
} else {
StopAutoHideTimer();
}
}
void ShelfLayoutManager::UpdateAutoHideForMouseEvent(ui::MouseEvent* event,
aura::Window* target) {
// This also checks IsShelfWindow() and IsStatusAreaWindow() to make sure we
// don't attempt to hide the shelf if the mouse down occurs on the shelf.
in_mouse_drag_ = (event->type() == ui::ET_MOUSE_DRAGGED ||
(in_mouse_drag_ && event->type() != ui::ET_MOUSE_RELEASED &&
event->type() != ui::ET_MOUSE_CAPTURE_CHANGED)) &&
!IsShelfWindow(target) && !IsStatusAreaWindow(target);
// Don't update during shutdown because synthetic mouse events (e.g. mouse
// exit) may be generated during status area widget teardown.
if (visibility_state() != SHELF_AUTO_HIDE || in_shutdown_)
return;
if (event->type() == ui::ET_MOUSE_PRESSED ||
event->type() == ui::ET_MOUSE_MOVED) {
if (shelf_->shelf_widget()->GetVisibleShelfBounds().Contains(
display::Screen::GetScreen()->GetCursorScreenPoint())) {
UpdateAutoHideState();
last_seen_mouse_position_was_over_shelf_ = true;
} else {
// The event happened outside the shelf's bounds. If it's a click, hide
// the shelf immediately. If it's a mouse-out, hide after a delay (but
// only if it really is a mouse-out, meaning the mouse actually exited the
// shelf bounds as opposed to having been outside all along).
if (event->type() == ui::ET_MOUSE_PRESSED)
UpdateAutoHideState();
else if (last_seen_mouse_position_was_over_shelf_)
StartAutoHideTimer();
last_seen_mouse_position_was_over_shelf_ = false;
}
}
}
void ShelfLayoutManager::UpdateContextualNudges() {
if (!ash::features::AreContextualNudgesEnabled())
return;
// Do not allow nudges outside of an active session.
if (Shell::Get()->session_controller()->GetSessionState() !=
session_manager::SessionState::ACTIVE) {
return;
}
const bool in_app_shelf = ShelfConfig::Get()->is_in_app();
const bool in_tablet_mode = Shell::Get()->IsInTabletMode();
contextual_tooltip::SetDragHandleNudgeDisabledForHiddenShelf(!IsVisible());
if (in_app_shelf && in_tablet_mode) {
if (contextual_tooltip::ShouldShowNudge(
Shell::Get()->session_controller()->GetLastActiveUserPrefService(),
contextual_tooltip::TooltipType::kDragHandle, nullptr)) {
shelf_widget_->ScheduleShowDragHandleNudge();
} else if (!shelf_widget_->GetDragHandle()->ShowingNudge()) {
// If the drag handle is not yet shown, HideDragHandleNudge() should
// cancel any scheduled show requests.
shelf_widget_->HideDragHandleNudge();
}
} else {
shelf_widget_->HideDragHandleNudge();
}
// Create home to overview nudge controller if home to overview nudge is
// allowed by the current shelf state.
const bool allow_home_to_overview_nudge = in_tablet_mode && !in_app_shelf;
if (allow_home_to_overview_nudge && !home_to_overview_nudge_controller_) {
home_to_overview_nudge_controller_ =
std::make_unique<HomeToOverviewNudgeController>(
shelf_->hotseat_widget());
}
if (home_to_overview_nudge_controller_) {
home_to_overview_nudge_controller_->SetNudgeAllowedForCurrentShelf(
allow_home_to_overview_nudge);
}
}
void ShelfLayoutManager::HideContextualNudges() {
if (!ash::features::AreContextualNudgesEnabled())
return;
shelf_widget_->HideDragHandleNudge();
if (home_to_overview_nudge_controller_)
home_to_overview_nudge_controller_->SetNudgeAllowedForCurrentShelf(false);
}
void ShelfLayoutManager::ProcessGestureEventOfAutoHideShelf(
ui::GestureEvent* event,
aura::Window* target) {
const bool is_shelf_window = IsShelfWindow(target);
// Skip event processing if shelf widget is fully visible to let the default
// event dispatching do its work.
if (IsVisible() || in_shutdown_) {
// Tap outside of the AUTO_HIDE_SHOWN shelf should hide it.
if (!is_shelf_window && !IsStatusAreaWindow(target) &&
visibility_state() == SHELF_AUTO_HIDE &&
state_.auto_hide_state == SHELF_AUTO_HIDE_SHOWN &&
event->type() == ui::ET_GESTURE_TAP) {
UpdateAutoHideState();
}
// Complete gesture drag when Shelf is visible in auto-hide mode. It is
// called when swiping Shelf up to show.
if (is_shelf_window && !IsStatusAreaWindow(target) &&
visibility_state() == SHELF_AUTO_HIDE &&
state_.auto_hide_state == SHELF_AUTO_HIDE_SHOWN &&
event->type() == ui::ET_GESTURE_END && drag_status_ != kDragNone) {
CompleteDrag(*event);
}
return;
}
if (is_shelf_window) {
ui::GestureEvent event_in_screen(*event);
gfx::Point location_in_screen(event->location());
::wm::ConvertPointToScreen(target, &location_in_screen);
event_in_screen.set_location(location_in_screen);
if (ProcessGestureEvent(event_in_screen))
event->StopPropagation();
}
}
void ShelfLayoutManager::ProcessGestureEventOfInAppHotseat(
ui::GestureEvent* event,
aura::Window* target) {
if (!IsHotseatEnabled())
return;
DCHECK_EQ(hotseat_state(), HotseatState::kExtended);
if (IsShelfWindow(target) || drag_status_ != DragStatus::kDragNone)
return;
base::AutoReset<bool> hide_hotseat(&should_hide_hotseat_, true);
UMA_HISTOGRAM_ENUMERATION(
kHotseatGestureHistogramName,
InAppShelfGestures::kHotseatHiddenDueToInteractionOutsideOfShelf);
UpdateVisibilityState();
}
void ShelfLayoutManager::AddObserver(ShelfLayoutManagerObserver* observer) {
observers_.AddObserver(observer);
}
void ShelfLayoutManager::RemoveObserver(ShelfLayoutManagerObserver* observer) {
observers_.RemoveObserver(observer);
}
bool ShelfLayoutManager::ProcessGestureEvent(
const ui::GestureEvent& event_in_screen) {
if (shelf_widget_->HandleLoginShelfGestureEvent(event_in_screen))
return true;
if (!IsDragAllowed())
return false;
if (event_in_screen.type() == ui::ET_GESTURE_SCROLL_BEGIN)
return StartGestureDrag(event_in_screen);
if (drag_status_ != kDragInProgress &&
drag_status_ != kDragAppListInProgress &&
drag_status_ != kDragHomeToOverviewInProgress) {
return false;
}
if (event_in_screen.type() == ui::ET_GESTURE_SCROLL_UPDATE) {
UpdateGestureDrag(event_in_screen);
return true;
}
if (event_in_screen.type() == ui::ET_GESTURE_SCROLL_END ||
event_in_screen.type() == ui::ET_SCROLL_FLING_START) {
if (event_in_screen.type() == ui::ET_SCROLL_FLING_START) {
last_drag_velocity_ =
event_in_screen.AsGestureEvent()->details().velocity_y();
}
if (drag_status_ == kDragAppListInProgress ||
drag_status_ == kDragHomeToOverviewInProgress) {
CompleteAppListDrag(event_in_screen);
} else {
CompleteDrag(event_in_screen);
}
return true;
}
// Unexpected event. Reset the state and let the event fall through.
CancelDrag(base::nullopt);
return false;
}
void ShelfLayoutManager::ProcessMouseEventFromShelf(
const ui::MouseEvent& event_in_screen) {
ui::EventType event_type = event_in_screen.type();
DCHECK(event_type == ui::ET_MOUSE_PRESSED ||
event_type == ui::ET_MOUSE_DRAGGED ||
event_type == ui::ET_MOUSE_RELEASED);
if (!IsDragAllowed())
return;
switch (event_type) {
case ui::ET_MOUSE_PRESSED:
AttemptToDragByMouse(event_in_screen);
break;
case ui::ET_MOUSE_DRAGGED:
UpdateMouseDrag(event_in_screen);
return;
case ui::ET_MOUSE_RELEASED:
ReleaseMouseDrag(event_in_screen);
return;
default:
NOTREACHED();
return;
}
}
void ShelfLayoutManager::ProcessGestureEventFromShelfWidget(
ui::GestureEvent* event_in_screen) {
if (ProcessGestureEvent(*event_in_screen))
event_in_screen->StopPropagation();
}
void ShelfLayoutManager::ProcessMouseWheelEventFromShelf(
ui::MouseWheelEvent* event,
bool from_touchpad) {
const int y_offset = GetOffset(event->y_offset(), from_touchpad);
if (y_offset <= ShelfConfig::Get()->mousewheel_scroll_offset_threshold())
return;
Shell::Get()->app_list_controller()->ToggleAppList(
display::Screen::GetScreen()
->GetDisplayNearestWindow(shelf_widget_->GetNativeWindow())
.id(),
kScrollFromShelf, event->time_stamp());
}
ShelfBackgroundType ShelfLayoutManager::GetShelfBackgroundType() const {
if (state_.pre_lock_screen_animation_active)
return ShelfBackgroundType::kDefaultBg;
// Handle all other non active screen states, including OOBE and pre-login.
if (state_.session_state == session_manager::SessionState::OOBE)
return ShelfBackgroundType::kOobe;
if (state_.session_state != session_manager::SessionState::ACTIVE) {
if (Shell::Get()->wallpaper_controller()->HasShownAnyWallpaper() &&
!Shell::Get()
->wallpaper_controller()
->IsWallpaperBlurredForLockState()) {
return ShelfBackgroundType::kLoginNonBlurredWallpaper;
}
return ShelfBackgroundType::kLogin;
}
const bool in_split_view_mode =
SplitViewController::Get(shelf_widget_->GetNativeWindow())
->InSplitViewMode();
const bool maximized =
in_split_view_mode ||
state_.window_state == WorkspaceWindowState::kFullscreen ||
(state_.window_state == WorkspaceWindowState::kMaximized &&
!Shell::Get()
->home_screen_controller()
->home_launcher_gesture_handler()
->GetActiveWindow());
const bool app_list_is_visible =
Shell::Get()->app_list_controller() &&
Shell::Get()->app_list_controller()->IsVisible(display_.id());
const bool in_overview =
Shell::Get()->overview_controller() &&
Shell::Get()->overview_controller()->InOverviewSession();
if (Shell::Get()->IsInTabletMode()) {
if (app_list_is_visible) {
// TODO(https://crbug.com/1058205): Test this behavior.
// If the IME virtual keyboard is showing, the shelf should appear in-app.
// The workspace area in tablet mode is always the in-app workspace area,
// and the virtual keyboard places itself on screen based on workspace
// area.
if (ShelfConfig::Get()->is_virtual_keyboard_shown())
return ShelfBackgroundType::kInApp;
// If the home launcher is shown or mostly shown, show the home launcher
// background. If it is mostly hidden, show the in-app or overview
// background.
if (!Shell::Get()->app_list_controller()->GetTargetVisibility(
display_.id())) {
return in_overview ? ShelfBackgroundType::kOverview
: ShelfBackgroundType::kInApp;
}
return ShelfBackgroundType::kHomeLauncher;
} else if (Shell::Get()
->app_list_controller()
->home_launcher_transition_state() !=
AppListControllerImpl::HomeLauncherTransitionState::kFinished) {
return ShelfBackgroundType::kHomeLauncher;
} else if (maximized) {
// If the home launcher is not shown but it is maximized, show the
// in-app shelf.
return ShelfBackgroundType::kInApp;
}
} else if (app_list_is_visible) {
// When auto-hide shelf is enabled, shelf cannot be considered maximized.
if (maximized && state_.visibility_state != SHELF_AUTO_HIDE)
return ShelfBackgroundType::kMaximizedWithAppList;
return ShelfBackgroundType::kAppList;
}
if (maximized) {
// When a window is maximized, if the auto-hide shelf is enabled and we are
// in clamshell mode, the shelf will keep the default transparent
// background.
if (!Shell::Get()->IsInTabletMode() &&
state_.visibility_state == SHELF_AUTO_HIDE)
return ShelfBackgroundType::kDefaultBg;
return ShelfBackgroundType::kMaximized;
}
if (in_overview)
return ShelfBackgroundType::kOverview;
return ShelfBackgroundType::kDefaultBg;
}
void ShelfLayoutManager::MaybeUpdateShelfBackground(AnimationChangeType type) {
const ShelfBackgroundType new_background_type(GetShelfBackgroundType());
if (new_background_type == shelf_background_type_)
return;
shelf_background_type_ = new_background_type;
for (auto& observer : observers_)
observer.OnBackgroundUpdated(shelf_background_type_, type);
}
bool ShelfLayoutManager::ShouldBlurShelfBackground() {
if (!is_background_blur_enabled_)
return false;
if (chromeos::switches::ShouldShowShelfHotseat()) {
return shelf_background_type_ == ShelfBackgroundType::kDefaultBg &&
state_.session_state == session_manager::SessionState::ACTIVE;
}
return (shelf_background_type_ == ShelfBackgroundType::kHomeLauncher ||
shelf_background_type_ == ShelfBackgroundType::kDefaultBg) &&
state_.session_state == session_manager::SessionState::ACTIVE;
}
bool ShelfLayoutManager::HasVisibleWindow() const {
aura::Window* root = shelf_widget_->GetNativeWindow()->GetRootWindow();
const aura::Window::Windows windows =
Shell::Get()->mru_window_tracker()->BuildWindowListIgnoreModal(
kActiveDesk);
// Process the window list and check if there are any visible windows.
// Ignore app list windows that may be animating to hide after dismissal.
for (auto* window : windows) {
if (window->IsVisible() && !IsAppListWindow(window) &&
root->Contains(window)) {
return true;
}
}
return false;
}
void ShelfLayoutManager::CancelDragOnShelfIfInProgress() {
if (drag_status_ == kDragInProgress ||
drag_status_ == kDragAppListInProgress ||
drag_status_ == kDragHomeToOverviewInProgress) {
CancelDrag(base::nullopt);
}
}
void ShelfLayoutManager::SuspendVisibilityUpdateForShutdown() {
++suspend_visibility_update_;
}
void ShelfLayoutManager::OnShelfItemSelected(ShelfAction action) {
switch (action) {
case SHELF_ACTION_NONE:
case SHELF_ACTION_APP_LIST_SHOWN:
case SHELF_ACTION_APP_LIST_DISMISSED:
case SHELF_ACTION_APP_LIST_BACK:
case SHELF_ACTION_WINDOW_MINIMIZED:
break;
case SHELF_ACTION_NEW_WINDOW_CREATED:
case SHELF_ACTION_WINDOW_ACTIVATED: {
base::AutoReset<bool> reset(&should_hide_hotseat_, true);
UpdateVisibilityState();
} break;
}
}
void ShelfLayoutManager::OnWindowResized() {
LayoutShelf();
}
void ShelfLayoutManager::SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) {
WmDefaultLayoutManager::SetChildBounds(child, requested_bounds);
// We may contain other widgets (such as frame maximize bubble) but they don't
// affect the layout in any way.
if (phase_ != ShelfLayoutPhase::kMoving &&
((shelf_widget_->GetNativeWindow() == child) ||
(shelf_widget_->status_area_widget()->GetNativeWindow() == child))) {
LayoutShelf(/*animate=*/true);
}
}
void ShelfLayoutManager::OnShelfAutoHideBehaviorChanged(
aura::Window* root_window) {
UpdateVisibilityState();
}
void ShelfLayoutManager::OnShelfAlignmentChanged(aura::Window* root_window,
ShelfAlignment old_alignment) {
UpdateVisibilityState();
}
void ShelfLayoutManager::OnUserWorkAreaInsetsChanged(
aura::Window* root_window) {
LayoutShelf();
}
void ShelfLayoutManager::OnPinnedStateChanged(aura::Window* pinned_window) {
// Shelf needs to be hidden on entering to pinned mode, or restored
// on exiting from pinned mode.
UpdateVisibilityState();
}
void ShelfLayoutManager::OnShellDestroying() {
// Prepare for shutdown early, to prevent window stacking changes that may
// happen during shutdown (e.g. during overview controller, or tablet mode
// controller destruction) from causing visibility and state updates.
PrepareForShutdown();
}