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chromium / chromium / src / ae5a004e4f42fef0bbfb3ee5231338e05f6720e7 / . / ash / shelf / shelf_layout_manager.cc
blob: 97e4f4e97ab41d7e9efb948fe45462b142a3de83 [file] [log] [blame]
// 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.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/model/app_list_view_state.h"
#include "ash/app_list/views/app_list_view.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_features.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.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_constants.h"
#include "ash/shelf/shelf_layout_manager_observer.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/system/locale/locale_update_controller.h"
#include "ash/system/status_area_widget.h"
#include "ash/wallpaper/wallpaper_controller.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/tablet_mode/tablet_mode_controller.h"
#include "ash/wm/window_state.h"
#include "ash/wm/window_util.h"
#include "base/auto_reset.h"
#include "base/command_line.h"
#include "base/i18n/rtl.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/event.h"
#include "ui/events/event_handler.h"
#include "ui/keyboard/keyboard_controller.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 {
// Delay before showing the shelf. This is after the mouse stops moving.
constexpr int kAutoHideDelayMS = 200;
// Duration of the animation to show or hide the shelf.
constexpr int kAnimationDurationMS = 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();
}
// 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 IsTabletModeEnabled() {
// Shell could be destroying. Shell destroys TabletModeController before
// closing all windows.
if (!Shell::Get()->tablet_mode_controller())
return false;
return Shell::Get()
->tablet_mode_controller()
->IsTabletModeWindowManagerEnabled();
}
bool IsHomeLauncherEnabledInTabletMode() {
// Home launcher flag is enabled by default and removed, so this is the same
// as checking tablet mode state.
return IsTabletModeEnabled();
}
} // namespace
// ShelfLayoutManager::UpdateShelfObserver -------------------------------------
// UpdateShelfObserver is used to delay updating the background until the
// animation completes.
class ShelfLayoutManager::UpdateShelfObserver
: public ui::ImplicitAnimationObserver {
public:
explicit UpdateShelfObserver(ShelfLayoutManager* shelf) : shelf_(shelf) {
shelf_->update_shelf_observer_ = this;
}
void Detach() { shelf_ = nullptr; }
void OnImplicitAnimationsCompleted() override {
if (shelf_)
shelf_->MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
delete this;
}
private:
~UpdateShelfObserver() override {
if (shelf_)
shelf_->update_shelf_observer_ = nullptr;
}
// Shelf we're in. nullptr if deleted before we're deleted.
ShelfLayoutManager* shelf_;
DISALLOW_COPY_AND_ASSIGN(UpdateShelfObserver);
};
ShelfLayoutManager::State::State()
: visibility_state(SHELF_VISIBLE),
auto_hide_state(SHELF_AUTO_HIDE_HIDDEN),
window_state(wm::WORKSPACE_WINDOW_STATE_DEFAULT),
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::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 ----------------------------------------------------------
ShelfLayoutManager::ShelfLayoutManager(ShelfWidget* shelf_widget, Shelf* shelf)
: shelf_widget_(shelf_widget),
shelf_(shelf),
is_background_blur_enabled_(
app_list_features::IsBackgroundBlurEnabled()) {
DCHECK(shelf_widget_);
DCHECK(shelf_);
Shell::Get()->AddShellObserver(this);
Shell::Get()->overview_controller()->AddObserver(this);
Shell::Get()->app_list_controller()->AddObserver(this);
Shell::Get()
->home_screen_controller()
->home_launcher_gesture_handler()
->AddObserver(this);
Shell::Get()->lock_state_controller()->AddObserver(this);
Shell::Get()->activation_client()->AddObserver(this);
Shell::Get()->locale_update_controller()->AddObserver(this);
state_.session_state = Shell::Get()->session_controller()->GetSessionState();
keyboard::KeyboardController::Get()->AddObserver(this);
wallpaper_controller_observer_.Add(Shell::Get()->wallpaper_controller());
display::Screen::GetScreen()->AddObserver(this);
}
ShelfLayoutManager::~ShelfLayoutManager() {
if (update_shelf_observer_)
update_shelf_observer_->Detach();
for (auto& observer : observers_)
observer.WillDeleteShelfLayoutManager();
display::Screen::GetScreen()->RemoveObserver(this);
keyboard::KeyboardController::Get()->RemoveObserver(this);
Shell::Get()->locale_update_controller()->RemoveObserver(this);
Shell::Get()->RemoveShellObserver(this);
Shell::Get()->lock_state_controller()->RemoveObserver(this);
// The following are destroyed early when Shell is being destroyed so they
// may not exist.
if (Shell::Get()->home_screen_controller()) {
Shell::Get()
->home_screen_controller()
->home_launcher_gesture_handler()
->RemoveObserver(this);
}
if (Shell::Get()->app_list_controller())
Shell::Get()->app_list_controller()->RemoveObserver(this);
if (Shell::Get()->overview_controller())
Shell::Get()->overview_controller()->RemoveObserver(this);
}
void ShelfLayoutManager::PrepareForShutdown() {
in_shutdown_ = true;
// Stop observing changes to avoid updating a partially destructed shelf.
Shell::Get()->activation_client()->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_.visibility_state == SHELF_VISIBLE ||
(state_.visibility_state == SHELF_AUTO_HIDE &&
state_.auto_hide_state == SHELF_AUTO_HIDE_SHOWN));
}
gfx::Rect ShelfLayoutManager::GetIdealBounds() const {
const int shelf_size = ShelfConstants::shelf_size();
aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
gfx::Rect rect(screen_util::GetDisplayBoundsInParent(shelf_window));
return 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::Size ShelfLayoutManager::GetPreferredSize() {
TargetBounds target_bounds;
CalculateTargetBoundsAndUpdateWorkArea(&target_bounds);
return target_bounds.shelf_bounds.size();
}
void ShelfLayoutManager::LayoutShelfAndUpdateBounds() {
TargetBounds target_bounds;
CalculateTargetBoundsAndUpdateWorkArea(&target_bounds);
UpdateBoundsAndOpacity(target_bounds, false, nullptr);
// Update insets in ShelfWindowTargeter when shelf bounds change.
for (auto& observer : observers_)
observer.WillChangeVisibilityState(visibility_state());
}
void ShelfLayoutManager::LayoutShelf() {
// The ShelfWidget may be partially closed (no native widget) during shutdown
// so skip layout.
if (in_shutdown_)
return;
LayoutShelfAndUpdateBounds();
}
ShelfVisibilityState ShelfLayoutManager::CalculateShelfVisibility() {
switch (shelf_->auto_hide_behavior()) {
case SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS:
return SHELF_AUTO_HIDE;
case SHELF_AUTO_HIDE_BEHAVIOR_NEVER:
return SHELF_VISIBLE;
case SHELF_AUTO_HIDE_ALWAYS_HIDDEN:
return SHELF_HIDDEN;
}
return SHELF_VISIBLE;
}
void ShelfLayoutManager::UpdateVisibilityState() {
// Bail out early after shelf is destroyed.
aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
if (in_shutdown_ || !shelf_window)
return;
wm::WorkspaceWindowState window_state(
RootWindowController::ForWindow(shelf_window)->GetWorkspaceWindowState());
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 SHELF_AUTO_HIDE_ALWAYS_HIDDEN.
switch (window_state) {
case wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN:
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 wm::WORKSPACE_WINDOW_STATE_MAXIMIZED:
SetState(IsShelfAutoHideForFullscreenMaximized()
? SHELF_AUTO_HIDE
: CalculateShelfVisibility());
break;
case wm::WORKSPACE_WINDOW_STATE_DEFAULT:
SetState(CalculateShelfVisibility());
break;
}
}
UpdateWorkspaceMask(window_state);
SendA11yAlertForFullscreenWorkspaceState(window_state);
}
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 (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::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();
}
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::AddObserver(ShelfLayoutManagerObserver* observer) {
observers_.AddObserver(observer);
}
void ShelfLayoutManager::RemoveObserver(ShelfLayoutManagerObserver* observer) {
observers_.RemoveObserver(observer);
}
bool ShelfLayoutManager::ProcessGestureEvent(
const ui::GestureEvent& event_in_screen) {
// The gestures are disabled in the lock/login screen.
SessionController* controller = Shell::Get()->session_controller();
if (!controller->NumberOfLoggedInUsers() || controller->IsScreenLocked())
return false;
if (IsShelfHiddenForFullscreen())
return false;
if (event_in_screen.type() == ui::ET_GESTURE_SCROLL_BEGIN)
return StartGestureDrag(event_in_screen);
if (gesture_drag_status_ != GESTURE_DRAG_IN_PROGRESS &&
gesture_drag_status_ != GESTURE_DRAG_APPLIST_IN_PROGRESS) {
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 (gesture_drag_status_ == GESTURE_DRAG_APPLIST_IN_PROGRESS)
CompleteAppListDrag(event_in_screen);
else
CompleteGestureDrag(event_in_screen);
return true;
}
// Unexpected event. Reset the state and let the event fall through.
CancelGestureDrag();
return false;
}
bool ShelfLayoutManager::IsDraggingWindowFromTopOrCaptionArea() const {
// Currently dragging maximized or fullscreen window from the top or the
// caption area is only allowed in tablet mode.
if (!IsTabletModeEnabled())
return false;
// TODO(minch): Check active window directly if removed search field
// in overview mode. http://crbug.com/866679
auto windows = Shell::Get()->mru_window_tracker()->BuildMruWindowList();
for (auto* window : windows) {
wm::WindowState* window_state = wm::GetWindowState(window);
if (window_state && window_state->is_dragged() &&
(window_state->IsMaximized() || window_state->IsFullscreen()) &&
(window_state->drag_details()->window_component == HTCLIENT ||
window_state->drag_details()->window_component == HTCAPTION)) {
return true;
}
}
return false;
}
ShelfBackgroundType ShelfLayoutManager::GetShelfBackgroundType() const {
if (state_.pre_lock_screen_animation_active)
return SHELF_BACKGROUND_DEFAULT;
// Handle all other non active screen states, including OOBE and pre-login.
if (state_.session_state == session_manager::SessionState::OOBE)
return SHELF_BACKGROUND_OOBE;
if (state_.session_state != session_manager::SessionState::ACTIVE) {
if (Shell::Get()->wallpaper_controller()->HasShownAnyWallpaper() &&
!Shell::Get()->wallpaper_controller()->IsWallpaperBlurred()) {
return SHELF_BACKGROUND_LOGIN_NONBLURRED_WALLPAPER;
}
return SHELF_BACKGROUND_LOGIN;
}
if (is_app_list_visible_) {
if (!IsHomeLauncherEnabledInTabletMode())
return SHELF_BACKGROUND_APP_LIST;
// In tablet mode, the app list(now referred to as Home Launcher) is always
// visible. If the Home Launcher is either fullscreen or being animated or
// dragged, show the transparent background.
if (is_home_launcher_shown_ || is_home_launcher_target_position_shown_)
return SHELF_BACKGROUND_DEFAULT;
}
if (Shell::Get()->IsSplitViewModeActive() ||
(state_.visibility_state != SHELF_AUTO_HIDE &&
state_.window_state == wm::WORKSPACE_WINDOW_STATE_MAXIMIZED)) {
return SHELF_BACKGROUND_MAXIMIZED;
}
if (Shell::Get()->overview_controller() &&
Shell::Get()->overview_controller()->IsSelecting()) {
return SHELF_BACKGROUND_OVERVIEW;
}
return SHELF_BACKGROUND_DEFAULT;
}
void ShelfLayoutManager::SetAccessibilityPanelHeight(int height) {
accessibility_panel_height_ = height;
LayoutShelf();
}
void ShelfLayoutManager::SetDockedMagnifierHeight(int height) {
docked_magnifier_height_ = height;
LayoutShelf();
}
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() {
return IsBackgroundBlurEnabled() &&
shelf_background_type_ == SHELF_BACKGROUND_DEFAULT &&
state_.session_state == session_manager::SessionState::ACTIVE;
}
void ShelfLayoutManager::OnWindowResized() {
LayoutShelf();
}
void ShelfLayoutManager::SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) {
wm::WmSnapToPixelLayoutManager::SetChildBounds(child, requested_bounds);
// We may contain other widgets (such as frame maximize bubble) but they don't
// effect the layout in anyway.
if (!updating_bounds_ &&
((shelf_widget_->GetNativeWindow() == child) ||
(shelf_widget_->status_area_widget()->GetNativeWindow() == child))) {
LayoutShelf();
}
}
void ShelfLayoutManager::OnShelfAutoHideBehaviorChanged(
aura::Window* root_window) {
UpdateVisibilityState();
}
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::OnSplitViewModeStarted() {
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnSplitViewModeEnded() {
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnOverviewModeStartingAnimationComplete(
bool canceled) {
UpdateVisibilityState();
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnOverviewModeEndingAnimationComplete(bool canceled) {
UpdateVisibilityState();
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnAppListVisibilityChanged(bool shown,
int64_t display_id) {
// Shell may be under destruction.
if (!shelf_widget_ || !shelf_widget_->GetNativeWindow())
return;
if (display_.id() != display_id)
return;
is_app_list_visible_ = shown;
MaybeUpdateShelfBackground(AnimationChangeType::IMMEDIATE);
}
void ShelfLayoutManager::OnHomeLauncherTargetPositionChanged(
bool showing,
int64_t display_id) {
// Shell may be under destruction.
if (!shelf_widget_ || !shelf_widget_->GetNativeWindow())
return;
if (display_.id() != display_id)
return;
is_home_launcher_target_position_shown_ = showing;
MaybeUpdateShelfBackground(AnimationChangeType::IMMEDIATE);
}
void ShelfLayoutManager::OnHomeLauncherAnimationComplete(bool shown,
int64_t display_id) {
// Shell may be under destruction.
if (!shelf_widget_ || !shelf_widget_->GetNativeWindow())
return;
if (display_.id() != display_id)
return;
is_home_launcher_shown_ = shown;
is_home_launcher_target_position_shown_ = false;
MaybeUpdateShelfBackground(AnimationChangeType::IMMEDIATE);
}
void ShelfLayoutManager::OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
UpdateAutoHideStateNow();
}
void ShelfLayoutManager::OnKeyboardAppearanceChanged(
const keyboard::KeyboardStateDescriptor& state) {
keyboard_occluded_bounds_ = state.occluded_bounds;
keyboard_displaced_bounds_ = state.displaced_bounds;
LayoutShelfAndUpdateBounds();
}
void ShelfLayoutManager::OnKeyboardVisibilityStateChanged(
const bool is_visible) {
// On login screen if keyboard has been just hidden, update bounds just once
// but ignore target_bounds.work_area_insets since shelf overlaps with login
// window.
if (Shell::Get()->session_controller()->IsUserSessionBlocked() &&
!is_visible) {
Shell::Get()->SetDisplayWorkAreaInsets(shelf_widget_->GetNativeWindow(),
gfx::Insets());
}
}
void ShelfLayoutManager::OnLockStateEvent(LockStateObserver::EventType event) {
if (event == EVENT_LOCK_ANIMATION_STARTED) {
// Enter the screen locked state and update the visibility to avoid an odd
// animation when transitioning the orientation from L/R to bottom.
state_.pre_lock_screen_animation_active = true;
UpdateShelfVisibilityAfterLoginUIChange();
} else {
state_.pre_lock_screen_animation_active = false;
}
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnSessionStateChanged(
session_manager::SessionState state) {
// Check transition changes to/from the add user to session and change the
// shelf alignment accordingly
const bool was_adding_user = state_.IsAddingSecondaryUser();
const bool was_locked = state_.IsScreenLocked();
state_.session_state = state;
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
if (was_adding_user != state_.IsAddingSecondaryUser()) {
UpdateShelfVisibilityAfterLoginUIChange();
return;
}
// Force the shelf to layout for alignment (bottom if locked, restore the
// previous alignment otherwise).
if (was_locked != state_.IsScreenLocked())
UpdateShelfVisibilityAfterLoginUIChange();
TargetBounds target_bounds;
CalculateTargetBoundsAndUpdateWorkArea(&target_bounds);
UpdateBoundsAndOpacity(target_bounds, true /* animate */, nullptr);
UpdateVisibilityState();
}
void ShelfLayoutManager::OnLoginStatusChanged(LoginStatus loing_status) {
UpdateVisibilityState();
}
void ShelfLayoutManager::OnWallpaperBlurChanged() {
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnFirstWallpaperShown() {
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
}
void ShelfLayoutManager::OnDisplayMetricsChanged(
const display::Display& display,
uint32_t changed_metrics) {
// Update |user_work_area_bounds_| for the new display arrangement.
TargetBounds target_bounds;
CalculateTargetBoundsAndUpdateWorkArea(&target_bounds);
}
void ShelfLayoutManager::OnLocaleChanged() {
// Layout update is needed when language changes between LTR and RTL.
LayoutShelfAndUpdateBounds();
}
////////////////////////////////////////////////////////////////////////////////
// ShelfLayoutManager, private:
ShelfLayoutManager::TargetBounds::TargetBounds()
: opacity(0.0f), status_opacity(0.0f) {}
ShelfLayoutManager::TargetBounds::~TargetBounds() = default;
void ShelfLayoutManager::SetState(ShelfVisibilityState visibility_state) {
State state;
state.visibility_state = visibility_state;
state.auto_hide_state = CalculateAutoHideState(visibility_state);
RootWindowController* controller =
RootWindowController::ForWindow(shelf_widget_->GetNativeWindow());
state.window_state = controller ? controller->GetWorkspaceWindowState()
: wm::WORKSPACE_WINDOW_STATE_DEFAULT;
// Preserve the log in screen states.
state.session_state = state_.session_state;
state.pre_lock_screen_animation_active =
state_.pre_lock_screen_animation_active;
// Force an update because gesture drags affect the shelf bounds and we
// should animate back to the normal bounds at the end of a gesture.
bool force_update =
(gesture_drag_status_ == GESTURE_DRAG_CANCEL_IN_PROGRESS ||
gesture_drag_status_ == GESTURE_DRAG_COMPLETE_IN_PROGRESS);
if (!force_update && state_.Equals(state))
return; // Nothing changed.
for (auto& observer : observers_)
observer.WillChangeVisibilityState(visibility_state);
StopAutoHideTimer();
State old_state = state_;
state_ = state;
AnimationChangeType change_type = AnimationChangeType::ANIMATE;
bool delay_background_change = false;
// Do not animate the background when:
// - Going from a hidden / auto hidden shelf in fullscreen to a visible shelf
// in tablet mode.
// - Going from an auto hidden shelf in tablet mode to a visible shelf in
// tablet mode.
if (state.visibility_state == SHELF_VISIBLE &&
state.window_state == wm::WORKSPACE_WINDOW_STATE_MAXIMIZED &&
old_state.visibility_state != SHELF_VISIBLE) {
change_type = AnimationChangeType::IMMEDIATE;
} else {
// Delay the animation when the shelf was hidden, and has just been made
// visible (e.g. using a gesture-drag).
if (state.visibility_state == SHELF_VISIBLE &&
old_state.visibility_state == SHELF_AUTO_HIDE &&
old_state.auto_hide_state == SHELF_AUTO_HIDE_HIDDEN) {
delay_background_change = true;
}
}
if (delay_background_change) {
if (update_shelf_observer_)
update_shelf_observer_->Detach();
// |update_shelf_observer_| deletes itself when the animation is done.
update_shelf_observer_ = new UpdateShelfObserver(this);
} else {
MaybeUpdateShelfBackground(change_type);
}
TargetBounds target_bounds;
CalculateTargetBoundsAndUpdateWorkArea(&target_bounds);
UpdateBoundsAndOpacity(
target_bounds, true /* animate */,
delay_background_change ? update_shelf_observer_ : nullptr);
// OnAutoHideStateChanged Should be emitted when:
// - firstly state changed to auto-hide from other state
// - or, auto_hide_state has changed
if ((old_state.visibility_state != state_.visibility_state &&
state_.visibility_state == SHELF_AUTO_HIDE) ||
old_state.auto_hide_state != state_.auto_hide_state) {
for (auto& observer : observers_)
observer.OnAutoHideStateChanged(state_.auto_hide_state);
}
}
void ShelfLayoutManager::UpdateBoundsAndOpacity(
const TargetBounds& target_bounds,
bool animate,
ui::ImplicitAnimationObserver* observer) {
StatusAreaWidget* status_widget = shelf_widget_->status_area_widget();
base::AutoReset<bool> auto_reset_updating_bounds(&updating_bounds_, true);
{
ui::ScopedLayerAnimationSettings shelf_animation_setter(
GetLayer(shelf_widget_)->GetAnimator());
ui::ScopedLayerAnimationSettings status_animation_setter(
GetLayer(status_widget)->GetAnimator());
if (animate) {
auto duration = base::TimeDelta::FromMilliseconds(kAnimationDurationMS);
shelf_animation_setter.SetTransitionDuration(duration);
shelf_animation_setter.SetTweenType(gfx::Tween::EASE_OUT);
shelf_animation_setter.SetPreemptionStrategy(
ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
status_animation_setter.SetTransitionDuration(duration);
status_animation_setter.SetTweenType(gfx::Tween::EASE_OUT);
status_animation_setter.SetPreemptionStrategy(
ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
} else {
StopAnimating();
shelf_animation_setter.SetTransitionDuration(base::TimeDelta());
status_animation_setter.SetTransitionDuration(base::TimeDelta());
}
if (observer)
status_animation_setter.AddObserver(observer);
GetLayer(shelf_widget_)->SetOpacity(target_bounds.opacity);
gfx::Rect shelf_bounds = target_bounds.shelf_bounds;
::wm::ConvertRectToScreen(shelf_widget_->GetNativeWindow()->parent(),
&shelf_bounds);
shelf_widget_->SetBounds(shelf_bounds);
GetLayer(status_widget)->SetOpacity(target_bounds.status_opacity);
// Having a window which is visible but does not have an opacity is an
// illegal state. We therefore hide the shelf here if required.
if (!target_bounds.status_opacity)
status_widget->Hide();
// Setting visibility during an animation causes the visibility property to
// animate. Override the animation settings to immediately set the
// visibility property. Opacity will still animate.
// TODO(harrym): Once status area widget is a child view of shelf
// this can be simplified.
gfx::Rect status_bounds = target_bounds.status_bounds_in_shelf;
status_bounds.Offset(target_bounds.shelf_bounds.OffsetFromOrigin());
::wm::ConvertRectToScreen(status_widget->GetNativeWindow()->parent(),
&status_bounds);
status_widget->SetBounds(status_bounds);
// Do not update the work area when the alignment changes to BOTTOM_LOCKED
// to prevent window movement when the screen is locked: crbug.com/622431
// The work area is initialized with BOTTOM_LOCKED insets to prevent window
// movement on async preference initialization in tests: crbug.com/834369
display_ = display::Screen::GetScreen()->GetDisplayNearestWindow(
shelf_widget_->GetNativeWindow());
bool in_overview = Shell::Get()->overview_controller()->IsSelecting();
if (!in_overview && !state_.IsScreenLocked() &&
(shelf_->alignment() != SHELF_ALIGNMENT_BOTTOM_LOCKED ||
display_.work_area() == display_.bounds())) {
gfx::Insets insets;
// If user session is blocked (login to new user session or add user to
// the existing session - multi-profile) then give 100% of work area only
// if keyboard is not shown.
if (!state_.IsAddingSecondaryUser() || IsKeyboardShown())
insets = target_bounds.work_area_insets;
Shell::Get()->SetDisplayWorkAreaInsets(shelf_widget_->GetNativeWindow(),
insets);
}
}
// Set an empty border to avoid the shelf view and status area overlapping.
// TODO(msw): Avoid setting bounds of views within the shelf widget here.
gfx::Rect shelf_bounds = gfx::Rect(target_bounds.shelf_bounds.size());
shelf_widget_->GetContentsView()->SetBorder(views::CreateEmptyBorder(
shelf_bounds.InsetsFrom(target_bounds.shelf_bounds_in_shelf)));
shelf_widget_->GetContentsView()->Layout();
// Setting visibility during an animation causes the visibility property to
// animate. Set the visibility property without an animation.
if (target_bounds.status_opacity)
status_widget->Show();
}
bool ShelfLayoutManager::IsKeyboardShown() const {
return !keyboard_displaced_bounds_.IsEmpty();
}
void ShelfLayoutManager::StopAnimating() {
GetLayer(shelf_widget_)->GetAnimator()->StopAnimating();
GetLayer(shelf_widget_->status_area_widget())->GetAnimator()->StopAnimating();
}
gfx::Rect ShelfLayoutManager::ComputeStableWorkArea() const {
TargetBounds target_bounds;
State state = state_;
state.visibility_state = SHELF_VISIBLE;
return CalculateTargetBounds(state, &target_bounds);
}
gfx::Rect ShelfLayoutManager::CalculateTargetBounds(
const State& state,
TargetBounds* target_bounds) const {
const int shelf_size = ShelfConstants::shelf_size();
// By default, show the whole shelf on the screen.
int shelf_in_screen_portion = shelf_size;
if (state.visibility_state == SHELF_AUTO_HIDE &&
state.auto_hide_state == SHELF_AUTO_HIDE_HIDDEN) {
shelf_in_screen_portion = kHiddenShelfInScreenPortion;
} else if (state.visibility_state == SHELF_HIDDEN || IsKeyboardShown()) {
shelf_in_screen_portion = 0;
}
aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
gfx::Rect available_bounds =
screen_util::GetDisplayBoundsWithShelf(shelf_window);
available_bounds.Inset(
0, accessibility_panel_height_ + docked_magnifier_height_, 0, 0);
int shelf_width = PrimaryAxisValue(available_bounds.width(), shelf_size);
int shelf_height = PrimaryAxisValue(shelf_size, available_bounds.height());
const int shelf_primary_position = SelectValueForShelfAlignment(
available_bounds.bottom() - shelf_in_screen_portion,
available_bounds.x() - shelf_size + shelf_in_screen_portion,
available_bounds.right() - shelf_in_screen_portion);
gfx::Point shelf_origin = SelectValueForShelfAlignment(
gfx::Point(available_bounds.x(), shelf_primary_position),
gfx::Point(shelf_primary_position, available_bounds.y()),
gfx::Point(shelf_primary_position, available_bounds.y()));
target_bounds->shelf_bounds = screen_util::SnapBoundsToDisplayEdge(
gfx::Rect(shelf_origin.x(), shelf_origin.y(), shelf_width, shelf_height),
shelf_widget_->GetNativeWindow());
gfx::Size status_size(
shelf_widget_->status_area_widget()->GetWindowBoundsInScreen().size());
if (shelf_->IsHorizontalAlignment())
status_size.set_height(shelf_size);
else
status_size.set_width(shelf_size);
gfx::Point status_origin = SelectValueForShelfAlignment(
gfx::Point(0, 0),
gfx::Point(shelf_width - status_size.width(),
shelf_height - status_size.height()),
gfx::Point(0, shelf_height - status_size.height()));
if (shelf_->IsHorizontalAlignment() && !base::i18n::IsRTL())
status_origin.set_x(shelf_width - status_size.width());
target_bounds->status_bounds_in_shelf = gfx::Rect(status_origin, status_size);
target_bounds->work_area_insets = SelectValueForShelfAlignment(
gfx::Insets(0, 0, GetWorkAreaInsets(state, shelf_height), 0),
gfx::Insets(0, GetWorkAreaInsets(state, shelf_width), 0, 0),
gfx::Insets(0, 0, 0, GetWorkAreaInsets(state, shelf_width)));
// TODO(varkha): The functionality of managing insets for display areas
// should probably be pushed to a separate component. This would simplify or
// remove entirely the dependency on keyboard and dock.
if (!keyboard_displaced_bounds_.IsEmpty()) {
// Also push in the work area inset for the keyboard if it is visible.
gfx::Insets keyboard_insets(0, 0, keyboard_displaced_bounds_.height(), 0);
target_bounds->work_area_insets += keyboard_insets;
}
// Also push in the work area insets for both the ChromeVox panel and the
// Docked Magnifier.
target_bounds->work_area_insets += gfx::Insets(
accessibility_panel_height_ + docked_magnifier_height_, 0, 0, 0);
target_bounds->opacity = ComputeTargetOpacity(state);
target_bounds->status_opacity =
(state.visibility_state == SHELF_AUTO_HIDE &&
state.auto_hide_state == SHELF_AUTO_HIDE_HIDDEN &&
gesture_drag_status_ != GESTURE_DRAG_IN_PROGRESS)
? 0.0f
: target_bounds->opacity;
if (gesture_drag_status_ == GESTURE_DRAG_IN_PROGRESS)
UpdateTargetBoundsForGesture(target_bounds);
// This needs to happen after calling UpdateTargetBoundsForGesture(), because
// that can change the size of the shelf.
target_bounds->shelf_bounds_in_shelf = SelectValueForShelfAlignment(
gfx::Rect(0, 0, shelf_width - status_size.width(),
target_bounds->shelf_bounds.height()),
gfx::Rect(0, 0, target_bounds->shelf_bounds.width(),
shelf_height - status_size.height()),
gfx::Rect(0, 0, target_bounds->shelf_bounds.width(),
shelf_height - status_size.height()));
available_bounds.Subtract(target_bounds->shelf_bounds);
available_bounds.Subtract(keyboard_occluded_bounds_);
aura::Window* root = shelf_window->GetRootWindow();
::wm::ConvertRectToScreen(root, &available_bounds);
return available_bounds;
}
void ShelfLayoutManager::CalculateTargetBoundsAndUpdateWorkArea(
TargetBounds* target_bounds) {
user_work_area_bounds_ = CalculateTargetBounds(state_, target_bounds);
}
void ShelfLayoutManager::UpdateTargetBoundsForGesture(
TargetBounds* target_bounds) const {
CHECK_EQ(GESTURE_DRAG_IN_PROGRESS, gesture_drag_status_);
const bool horizontal = shelf_->IsHorizontalAlignment();
const int shelf_size = ShelfConstants::shelf_size();
gfx::Rect available_bounds =
screen_util::GetDisplayBoundsWithShelf(shelf_widget_->GetNativeWindow());
int resistance_free_region = 0;
bool hidden_at_start = false;
if (gesture_drag_auto_hide_state_ == SHELF_AUTO_HIDE_HIDDEN &&
visibility_state() == SHELF_AUTO_HIDE &&
auto_hide_state() != SHELF_AUTO_HIDE_SHOWN) {
// If the shelf was hidden when the drag started (and the state hasn't
// changed since then, e.g. because the tray-menu was shown because of the
// drag), then allow the drag some resistance-free region at first to make
// sure the shelf sticks with the finger until the shelf is visible.
resistance_free_region = shelf_size - kHiddenShelfInScreenPortion;
hidden_at_start = true;
}
bool resist = SelectValueForShelfAlignment(
gesture_drag_amount_<-resistance_free_region, gesture_drag_amount_>
resistance_free_region,
gesture_drag_amount_ < -resistance_free_region);
float translate = 0.f;
if (resist) {
float diff = fabsf(gesture_drag_amount_) - resistance_free_region;
diff = std::min(diff, sqrtf(diff));
if (gesture_drag_amount_ < 0)
translate = -resistance_free_region - diff;
else
translate = resistance_free_region + diff;
} else {
translate = gesture_drag_amount_;
}
// Move the shelf with the gesture.
const int baseline = SelectValueForShelfAlignment(
available_bounds.bottom() - (hidden_at_start ? 0 : shelf_size),
available_bounds.x() - (hidden_at_start ? shelf_size : 0),
available_bounds.right() - (hidden_at_start ? 0 : shelf_size));
if (horizontal) {
target_bounds->shelf_bounds.set_y(baseline + translate);
target_bounds->status_bounds_in_shelf.set_y(0);
} else {
target_bounds->shelf_bounds.set_x(baseline + translate);
target_bounds->status_bounds_in_shelf.set_x(0);
}
}
void ShelfLayoutManager::UpdateAutoHideStateNow() {
SetState(state_.visibility_state);
// If the state did not change, the auto hide timer may still be running.
StopAutoHideTimer();
}
void ShelfLayoutManager::StartAutoHideTimer() {
auto_hide_timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(kAutoHideDelayMS),
this, &ShelfLayoutManager::UpdateAutoHideStateNow);
}
void ShelfLayoutManager::StopAutoHideTimer() {
auto_hide_timer_.Stop();
mouse_over_shelf_when_auto_hide_timer_started_ = false;
}
gfx::Rect ShelfLayoutManager::GetVisibleShelfBounds() const {
gfx::Rect shelf_region = shelf_widget_->GetWindowBoundsInScreen();
DCHECK(!display_.bounds().IsEmpty());
shelf_region.Intersect(display_.bounds());
return screen_util::SnapBoundsToDisplayEdge(shelf_region,
shelf_widget_->GetNativeWindow());
}
gfx::Rect ShelfLayoutManager::GetAutoHideShowShelfRegionInScreen() const {
gfx::Rect shelf_bounds_in_screen = GetVisibleShelfBounds();
gfx::Vector2d offset = SelectValueForShelfAlignment(
gfx::Vector2d(0, shelf_bounds_in_screen.height()),
gfx::Vector2d(-kMaxAutoHideShowShelfRegionSize, 0),
gfx::Vector2d(shelf_bounds_in_screen.width(), 0));
gfx::Rect show_shelf_region_in_screen = shelf_bounds_in_screen;
show_shelf_region_in_screen += offset;
if (shelf_->IsHorizontalAlignment())
show_shelf_region_in_screen.set_height(kMaxAutoHideShowShelfRegionSize);
else
show_shelf_region_in_screen.set_width(kMaxAutoHideShowShelfRegionSize);
// TODO(pkotwicz): Figure out if we need any special handling when the
// keyboard is visible.
return screen_util::SnapBoundsToDisplayEdge(show_shelf_region_in_screen,
shelf_widget_->GetNativeWindow());
}
bool ShelfLayoutManager::HasVisibleWindow() const {
aura::Window* root = shelf_widget_->GetNativeWindow()->GetRootWindow();
const aura::Window::Windows windows =
Shell::Get()->mru_window_tracker()->BuildWindowListIgnoreModal();
// 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;
}
}
auto* pip_container = Shell::GetContainer(root, kShellWindowId_PipContainer);
// The PIP window is not activatable and is not in the MRU list, but count
// it as a visible window for shelf auto-hide purposes. See crbug.com/942991.
return !pip_container->children().empty();
}
ShelfAutoHideState ShelfLayoutManager::CalculateAutoHideState(
ShelfVisibilityState visibility_state) const {
// Shelf is not available before login.
// TODO(crbug.com/701157): Remove this when the login webui fake-shelf is
// replaced with views.
if (!Shell::Get()->session_controller()->IsActiveUserSessionStarted())
return SHELF_AUTO_HIDE_HIDDEN;
if (visibility_state != SHELF_AUTO_HIDE)
return SHELF_AUTO_HIDE_HIDDEN;
// Don't update the auto hide state if it is locked.
if (shelf_->auto_hide_lock())
return state_.auto_hide_state;
if (shelf_widget_->IsShowingAppList() && !IsHomeLauncherEnabledInTabletMode())
return SHELF_AUTO_HIDE_SHOWN;
if (shelf_widget_->status_area_widget() &&
shelf_widget_->status_area_widget()->ShouldShowShelf()) {
return SHELF_AUTO_HIDE_SHOWN;
}
if (shelf_widget_->IsShowingMenu())
return SHELF_AUTO_HIDE_SHOWN;
if (shelf_widget_->IsShowingOverflowBubble())
return SHELF_AUTO_HIDE_SHOWN;
if (shelf_widget_->IsActive() ||
(shelf_widget_->status_area_widget() &&
shelf_widget_->status_area_widget()->IsActive())) {
return SHELF_AUTO_HIDE_SHOWN;
}
// If there are no visible windows do not hide the shelf.
if (!HasVisibleWindow())
return SHELF_AUTO_HIDE_SHOWN;
if (IsDraggingWindowFromTopOrCaptionArea())
return SHELF_AUTO_HIDE_SHOWN;
// Do not hide the shelf if overview mode is active.
if (Shell::Get()->overview_controller() &&
Shell::Get()->overview_controller()->IsSelecting()) {
return SHELF_AUTO_HIDE_SHOWN;
}
if (gesture_drag_status_ == GESTURE_DRAG_APPLIST_IN_PROGRESS)
return SHELF_AUTO_HIDE_SHOWN;
if (gesture_drag_status_ == GESTURE_DRAG_COMPLETE_IN_PROGRESS ||
gesture_drag_status_ == GESTURE_DRAG_CANCEL_IN_PROGRESS) {
return gesture_drag_auto_hide_state_;
}
// Don't show if the user is dragging the mouse.
if (in_mouse_drag_)
return SHELF_AUTO_HIDE_HIDDEN;
gfx::Rect shelf_region = GetVisibleShelfBounds();
if (shelf_widget_->status_area_widget() &&
shelf_widget_->status_area_widget()->IsMessageBubbleShown() &&
IsVisible()) {
// Increase the the hit test area to prevent the shelf from disappearing
// when the mouse is over the bubble gap.
ShelfAlignment alignment = shelf_->alignment();
shelf_region.Inset(
alignment == SHELF_ALIGNMENT_RIGHT ? -kNotificationBubbleGapHeight : 0,
shelf_->IsHorizontalAlignment() ? -kNotificationBubbleGapHeight : 0,
alignment == SHELF_ALIGNMENT_LEFT ? -kNotificationBubbleGapHeight : 0,
0);
}
gfx::Point cursor_position_in_screen =
display::Screen::GetScreen()->GetCursorScreenPoint();
// Cursor is invisible in tablet mode and plug in an external mouse in tablet
// mode will switch to clamshell mode.
if (shelf_region.Contains(cursor_position_in_screen) &&
!IsTabletModeEnabled()) {
return SHELF_AUTO_HIDE_SHOWN;
}
// When the shelf is auto hidden and the shelf is on the boundary between two
// displays, it is hard to trigger showing the shelf. For instance, if a
// user's primary display is left of their secondary display, it is hard to
// unautohide a left aligned shelf on the secondary display.
// It is hard because:
// - It is hard to stop the cursor in the shelf "light bar" and not overshoot.
// - The cursor is warped to the other display if the cursor gets to the edge
// of the display.
// Show the shelf if the cursor started on the shelf and the user overshot the
// shelf slightly to make it easier to show the shelf in this situation. We
// do not check |auto_hide_timer_|.IsRunning() because it returns false when
// the timer's task is running.
if ((state_.auto_hide_state == SHELF_AUTO_HIDE_SHOWN ||
mouse_over_shelf_when_auto_hide_timer_started_) &&
GetAutoHideShowShelfRegionInScreen().Contains(
cursor_position_in_screen)) {
return SHELF_AUTO_HIDE_SHOWN;
}
return SHELF_AUTO_HIDE_HIDDEN;
}
bool ShelfLayoutManager::IsShelfWindow(aura::Window* window) {
if (!window)
return false;
const aura::Window* shelf_window = shelf_widget_->GetNativeWindow();
return shelf_window && shelf_window->Contains(window);
}
bool ShelfLayoutManager::IsStatusAreaWindow(aura::Window* window) {
if (!window)
return false;
const aura::Window* status_window =
shelf_widget_->status_area_widget()->GetNativeWindow();
return status_window && status_window->Contains(window);
}
int ShelfLayoutManager::GetWorkAreaInsets(const State& state, int size) const {
// The virtual keyboard always hides the shelf (in any orientation).
// Therefore, if the keyboard is shown, there is no need to reduce the work
// area by the size of the shelf.
if (IsKeyboardShown())
return 0;
if (state.visibility_state == SHELF_VISIBLE)
return size;
return 0;
}
void ShelfLayoutManager::UpdateShelfVisibilityAfterLoginUIChange() {
UpdateVisibilityState();
LayoutShelf();
}
float ShelfLayoutManager::ComputeTargetOpacity(const State& state) const {
if (gesture_drag_status_ == GESTURE_DRAG_IN_PROGRESS ||
state.visibility_state == SHELF_VISIBLE) {
return 1.0f;
}
// In Chrome OS Material Design, when shelf is hidden during auto hide state,
// target bounds are also hidden. So the window can extend to the edge of
// screen.
return (state.visibility_state == SHELF_AUTO_HIDE &&
state.auto_hide_state == SHELF_AUTO_HIDE_SHOWN)
? 1.0f
: 0.0f;
}
bool ShelfLayoutManager::IsShelfHiddenForFullscreen() const {
const aura::Window* fullscreen_window =
wm::GetWindowForFullscreenMode(shelf_widget_->GetNativeWindow());
return fullscreen_window &&
wm::GetWindowState(fullscreen_window)->GetHideShelfWhenFullscreen();
}
bool ShelfLayoutManager::IsShelfAutoHideForFullscreenMaximized() const {
wm::WindowState* active_window = wm::GetActiveWindowState();
return active_window &&
active_window->autohide_shelf_when_maximized_or_fullscreen();
}
bool ShelfLayoutManager::ShouldHomeGestureHandleEvent(float scroll_y) const {
// If the shelf is not visible, home gesture shouldn't trigger.
if (!IsVisible())
return false;
// Scroll down events should never be handled, unless they are currently being
// handled
if (scroll_y >= 0 && gesture_drag_status_ != GESTURE_DRAG_APPLIST_IN_PROGRESS)
return false;
return true;
}
bool ShelfLayoutManager::StartGestureDrag(
const ui::GestureEvent& gesture_in_screen) {
if (CanStartFullscreenAppListDrag(
gesture_in_screen.details().scroll_y_hint())) {
const gfx::Rect shelf_bounds = GetIdealBounds();
shelf_background_type_before_drag_ = shelf_background_type_;
gesture_drag_status_ = GESTURE_DRAG_APPLIST_IN_PROGRESS;
Shell::Get()->app_list_controller()->Show(
display::Screen::GetScreen()
->GetDisplayNearestWindow(shelf_widget_->GetNativeWindow())
.id(),
app_list::kSwipeFromShelf, gesture_in_screen.time_stamp());
Shell::Get()->app_list_controller()->UpdateYPositionAndOpacity(
shelf_bounds.y(), GetAppListBackgroundOpacityOnShelfOpacity());
launcher_above_shelf_bottom_amount_ =
shelf_bounds.bottom() - gesture_in_screen.location().y();
return true;
}
if (ShouldHomeGestureHandleEvent(
gesture_in_screen.details().scroll_y_hint())) {
GestureDragStatus previous_drag_status = gesture_drag_status_;
gesture_drag_status_ = GESTURE_DRAG_APPLIST_IN_PROGRESS;
HomeLauncherGestureHandler* home_launcher_handler =
Shell::Get()->home_screen_controller()->home_launcher_gesture_handler();
if (home_launcher_handler->OnPressEvent(
HomeLauncherGestureHandler::Mode::kSlideUpToShow,
gesture_in_screen.location())) {
return true;
} else {
gesture_drag_status_ = previous_drag_status;
}
}
// Disable the shelf dragging if the fullscreen app list is opened.
if (is_app_list_visible_ && !IsHomeLauncherEnabledInTabletMode())
return false;
// Also disable shelf drags until the overflow shelf is closed.
if (shelf_widget_->IsShowingOverflowBubble())
return false;
gesture_drag_status_ = GESTURE_DRAG_IN_PROGRESS;
gesture_drag_auto_hide_state_ = visibility_state() == SHELF_AUTO_HIDE
? auto_hide_state()
: SHELF_AUTO_HIDE_SHOWN;
MaybeUpdateShelfBackground(AnimationChangeType::ANIMATE);
gesture_drag_amount_ = 0.f;
return true;
}
void ShelfLayoutManager::UpdateGestureDrag(
const ui::GestureEvent& gesture_in_screen) {
if (ShouldHomeGestureHandleEvent(gesture_in_screen.details().scroll_y())) {
HomeLauncherGestureHandler* home_launcher_handler =
Shell::Get()->home_screen_controller()->home_launcher_gesture_handler();
if (home_launcher_handler->OnScrollEvent(
gesture_in_screen.location(),
gesture_in_screen.details().scroll_y())) {
return;
}
}
if (gesture_drag_status_ == GESTURE_DRAG_APPLIST_IN_PROGRESS) {
// Dismiss the app list if the shelf changed to vertical alignment during
// dragging.
if (!shelf_->IsHorizontalAlignment()) {
Shell::Get()->app_list_controller()->DismissAppList();
launcher_above_shelf_bottom_amount_ = 0.f;
gesture_drag_status_ = GESTURE_DRAG_NONE;
return;
}
const gfx::Rect shelf_bounds = GetIdealBounds();
Shell::Get()->app_list_controller()->UpdateYPositionAndOpacity(
std::min(gesture_in_screen.location().y(), shelf_bounds.y()),
GetAppListBackgroundOpacityOnShelfOpacity());
launcher_above_shelf_bottom_amount_ =
shelf_bounds.bottom() - gesture_in_screen.location().y();
} else {
gesture_drag_amount_ +=
PrimaryAxisValue(gesture_in_screen.details().scroll_y(),
gesture_in_screen.details().scroll_x());
LayoutShelf();
}
}
void ShelfLayoutManager::CompleteGestureDrag(
const ui::GestureEvent& gesture_in_screen) {
if (!ShouldChangeVisibilityAfterDrag(gesture_in_screen)) {
CancelGestureDrag();
return;
}
shelf_widget_->Deactivate();
shelf_widget_->status_area_widget()->Deactivate();
gesture_drag_auto_hide_state_ =
gesture_drag_auto_hide_state_ == SHELF_AUTO_HIDE_SHOWN
? SHELF_AUTO_HIDE_HIDDEN
: SHELF_AUTO_HIDE_SHOWN;
// Gesture drag will only change the auto hide state of the shelf but not the
// auto hide behavior. Auto hide behavior can only be changed through the
// context menu of the shelf. Set |gesture_drag_status_| to
// GESTURE_DRAG_COMPLETE_IN_PROGRESS to set the auto hide state to
// |gesture_drag_auto_hide_state_|.
gesture_drag_status_ = GESTURE_DRAG_COMPLETE_IN_PROGRESS;
UpdateVisibilityState();
gesture_drag_status_ = GESTURE_DRAG_NONE;
}
void ShelfLayoutManager::CompleteAppListDrag(
const ui::GestureEvent& gesture_in_screen) {
// Change the shelf alignment to vertical during drag will reset
// |gesture_drag_status_| to |GESTURE_DRAG_NONE|.
if (gesture_drag_status_ == GESTURE_DRAG_NONE)
return;
HomeLauncherGestureHandler* home_launcher_handler =
Shell::Get()->home_screen_controller()->home_launcher_gesture_handler();
DCHECK(home_launcher_handler);
if (home_launcher_handler->OnReleaseEvent(gesture_in_screen.location())) {
gesture_drag_status_ = GESTURE_DRAG_NONE;
return;
}
using app_list::AppListViewState;
AppListViewState app_list_state =
Shell::Get()->app_list_controller()->CalculateStateAfterShelfDrag(
gesture_in_screen, launcher_above_shelf_bottom_amount_);
// Keep auto-hide shelf visible if failed to open the app list.
base::Optional<Shelf::ScopedAutoHideLock> auto_hide_lock;
if (app_list_state == AppListViewState::CLOSED)
auto_hide_lock.emplace(shelf_);
Shell::Get()->app_list_controller()->EndDragFromShelf(app_list_state);
gesture_drag_status_ = GESTURE_DRAG_NONE;
}
void ShelfLayoutManager::CancelGestureDrag() {
if (gesture_drag_status_ == GESTURE_DRAG_APPLIST_IN_PROGRESS) {
HomeLauncherGestureHandler* home_launcher_handler =
Shell::Get()->home_screen_controller()->home_launcher_gesture_handler();
DCHECK(home_launcher_handler);
if (home_launcher_handler->IsDragInProgress())
home_launcher_handler->Cancel();
else
Shell::Get()->app_list_controller()->DismissAppList();
} else {
// Set |gesture_drag_status_| to GESTURE_DRAG_CANCEL_IN_PROGRESS to set the
// auto hide state to |gesture_drag_auto_hide_state_|, which is the
// visibility state before starting drag.
gesture_drag_status_ = GESTURE_DRAG_CANCEL_IN_PROGRESS;
UpdateVisibilityState();
}
gesture_drag_status_ = GESTURE_DRAG_NONE;
}
bool ShelfLayoutManager::CanStartFullscreenAppListDrag(
float scroll_y_hint) const {
// Fullscreen app list can only be dragged from bottom alignment shelf.
if (!shelf_->IsHorizontalAlignment())
return false;
// If the shelf is not visible, swiping up should show the shelf.
if (!IsVisible())
return false;
// Do not show the fullscreen app list until the overflow bubble has been
// closed.
if (shelf_widget_->IsShowingOverflowBubble())
return false;
// If app list is already opened, swiping up on the shelf should keep the app
// list opened.
if (is_app_list_visible_)
return false;
// Swipes down on shelf should hide the shelf.
if (scroll_y_hint >= 0)
return false;
// In overview mode, app list for tablet mode is hidden temporarily and will
// be shown automatically after overview mode ends. So prevent opening it
// here.
if (IsHomeLauncherEnabledInTabletMode())
return false;
return true;
}
float ShelfLayoutManager::GetAppListBackgroundOpacityOnShelfOpacity() {
float shelf_opacity = shelf_widget_->GetBackgroundAlphaValue(
shelf_background_type_before_drag_) /
static_cast<float>(ShelfBackgroundAnimator::kMaxAlpha);
const int shelf_size = ShelfConstants::shelf_size();
if (launcher_above_shelf_bottom_amount_ < shelf_size)
return shelf_opacity;
float launcher_above_shelf_amount =
std::max(0.f, launcher_above_shelf_bottom_amount_ - shelf_size);
float coefficient =
std::min(launcher_above_shelf_amount /
(app_list::AppListView::kNumOfShelfSize * shelf_size),
1.0f);
float app_list_view_opacity =
is_background_blur_enabled_
? app_list::AppListView::kAppListOpacityWithBlur
: app_list::AppListView::kAppListOpacity;
return app_list_view_opacity * coefficient +
(1 - coefficient) * shelf_opacity;
}
bool ShelfLayoutManager::IsSwipingCorrectDirection() {
switch (shelf_->alignment()) {
case SHELF_ALIGNMENT_BOTTOM:
case SHELF_ALIGNMENT_BOTTOM_LOCKED:
case SHELF_ALIGNMENT_RIGHT:
if (gesture_drag_auto_hide_state_ == SHELF_AUTO_HIDE_SHOWN)
return gesture_drag_amount_ > 0;
return gesture_drag_amount_ < 0;
case SHELF_ALIGNMENT_LEFT:
if (gesture_drag_auto_hide_state_ == SHELF_AUTO_HIDE_SHOWN)
return gesture_drag_amount_ < 0;
return gesture_drag_amount_ > 0;
}
return false;
}
bool ShelfLayoutManager::ShouldChangeVisibilityAfterDrag(
const ui::GestureEvent& gesture_in_screen) {
// Shelf can be visible in 1) SHELF_VISIBLE or 2) SHELF_AUTO_HIDE but in
// SHELF_AUTO_HIDE_SHOWN. See details in IsVisible. Dragging on SHELF_VISIBLE
// shelf should not change its visibility since it should be kept visible.
if (visibility_state() == SHELF_VISIBLE)
return false;
if (gesture_in_screen.type() == ui::ET_GESTURE_SCROLL_END) {
// The visibility of the shelf changes only if the shelf was dragged X%
// along the correct axis. If the shelf was already visible, then the
// direction of the drag does not matter.
const float kDragHideThreshold = 0.4f;
const gfx::Rect bounds = GetIdealBounds();
const float drag_ratio =
fabs(gesture_drag_amount_) /
(shelf_->IsHorizontalAlignment() ? bounds.height() : bounds.width());
return IsSwipingCorrectDirection() && drag_ratio > kDragHideThreshold;
}
if (gesture_in_screen.type() == ui::ET_SCROLL_FLING_START)
return IsSwipingCorrectDirection();
return false;
}
void ShelfLayoutManager::UpdateWorkspaceMask(
wm::WorkspaceWindowState window_state) {
// Disable the mask on NonLockScreenContainer if maximized/fullscreen window
// is on top.
// TODO(oshima): Investigate if we can remove SetMasksToBounds calls
// crbug.com/898236.
auto* root_window_controller =
RootWindowController::ForWindow(shelf_widget_->GetNativeWindow());
auto* container = root_window_controller->GetContainer(
kShellWindowId_NonLockScreenContainersContainer);
switch (window_state) {
case wm::WORKSPACE_WINDOW_STATE_MAXIMIZED:
case wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN:
container->layer()->SetMasksToBounds(false);
break;
case wm::WORKSPACE_WINDOW_STATE_DEFAULT:
container->layer()->SetMasksToBounds(true);
break;
}
}
void ShelfLayoutManager::SendA11yAlertForFullscreenWorkspaceState(
wm::WorkspaceWindowState current_workspace_window_state) {
if (previous_workspace_window_state_ !=
wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN &&
current_workspace_window_state ==
wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN) {
Shell::Get()->accessibility_controller()->TriggerAccessibilityAlert(
mojom::AccessibilityAlert::WORKSPACE_FULLSCREEN_STATE_ENTERED);
} else if (previous_workspace_window_state_ ==
wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN &&
current_workspace_window_state !=
wm::WORKSPACE_WINDOW_STATE_FULL_SCREEN) {
Shell::Get()->accessibility_controller()->TriggerAccessibilityAlert(
mojom::AccessibilityAlert::WORKSPACE_FULLSCREEN_STATE_EXITED);
}
previous_workspace_window_state_ = current_workspace_window_state;
}
} // namespace ash