ash/wm/app_list_controller.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/wm/app_list_controller.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/root_window_controller.h"
   9 #include "ash/screen_util.h"
  10 #include "ash/shelf/shelf.h"
  11 #include "ash/shelf/shelf_layout_manager.h"
  12 #include "ash/shell.h"
  13 #include "ash/shell_delegate.h"
  14 #include "ash/shell_window_ids.h"
  15 #include "base/command_line.h"
  16 #include "ui/app_list/app_list_constants.h"
  17 #include "ui/app_list/app_list_switches.h"
  18 #include "ui/app_list/pagination_model.h"
  19 #include "ui/app_list/views/app_list_view.h"
  20 #include "ui/aura/client/focus_client.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/aura/window_event_dispatcher.h"
  23 #include "ui/compositor/layer.h"
  24 #include "ui/compositor/scoped_layer_animation_settings.h"
  25 #include "ui/events/event.h"
  26 #include "ui/gfx/transform_util.h"
  27 #include "ui/views/widget/widget.h"
  28
  29 namespace ash {
  30 namespace internal {
  31
  32 namespace {
  33
  34 // Duration for show/hide animation in milliseconds.
  35 const int kAnimationDurationMs = 200;
  36
  37 // Offset in pixels to animation away/towards the shelf.
  38 const int kAnimationOffset = 8;
  39
  40 // The maximum shift in pixels when over-scroll happens.
  41 const int kMaxOverScrollShift = 48;
  42
  43 // The minimal anchor position offset to make sure that the bubble is still on
  44 // the screen with 8 pixels spacing on the left / right. This constant is a
  45 // result of minimal bubble arrow sizes and offsets.
  46 const int kMinimalAnchorPositionOffset = 57;
  47
  48 ui::Layer* GetLayer(views::Widget* widget) {
  49   return widget->GetNativeView()->layer();
  50 }
  51
  52 // Gets arrow location based on shelf alignment.
  53 views::BubbleBorder::Arrow GetBubbleArrow(aura::Window* window) {
  54   DCHECK(Shell::HasInstance());
  55   return ShelfLayoutManager::ForShelf(window)->
  56       SelectValueForShelfAlignment(
  57           views::BubbleBorder::BOTTOM_CENTER,
  58           views::BubbleBorder::LEFT_CENTER,
  59           views::BubbleBorder::RIGHT_CENTER,
  60           views::BubbleBorder::TOP_CENTER);
  61 }
  62
  63 // Offset given |rect| towards shelf.
  64 gfx::Rect OffsetTowardsShelf(const gfx::Rect& rect, views::Widget* widget) {
  65   DCHECK(Shell::HasInstance());
  66   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  67       widget->GetNativeView()->GetRootWindow());
  68   gfx::Rect offseted(rect);
  69   switch (shelf_alignment) {
  70     case SHELF_ALIGNMENT_BOTTOM:
  71       offseted.Offset(0, kAnimationOffset);
  72       break;
  73     case SHELF_ALIGNMENT_LEFT:
  74       offseted.Offset(-kAnimationOffset, 0);
  75       break;
  76     case SHELF_ALIGNMENT_RIGHT:
  77       offseted.Offset(kAnimationOffset, 0);
  78       break;
  79     case SHELF_ALIGNMENT_TOP:
  80       offseted.Offset(0, -kAnimationOffset);
  81       break;
  82   }
  83
  84   return offseted;
  85 }
  86
  87 // Using |button_bounds|, determine the anchor offset so that the bubble gets
  88 // shown above the shelf (used for the alternate shelf theme).
  89 gfx::Vector2d GetAnchorPositionOffsetToShelf(
  90     const gfx::Rect& button_bounds, views::Widget* widget) {
  91   DCHECK(Shell::HasInstance());
  92   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  93       widget->GetNativeView()->GetRootWindow());
  94   gfx::Point anchor(button_bounds.CenterPoint());
  95   switch (shelf_alignment) {
  96     case SHELF_ALIGNMENT_TOP:
  97     case SHELF_ALIGNMENT_BOTTOM:
  98       if (base::i18n::IsRTL()) {
  99         int screen_width = widget->GetWorkAreaBoundsInScreen().width();
 100         return gfx::Vector2d(
 101             std::min(screen_width - kMinimalAnchorPositionOffset - anchor.x(),
 102                      0), 0);
 103       }
 104       return gfx::Vector2d(
 105           std::max(kMinimalAnchorPositionOffset - anchor.x(), 0), 0);
 106     case SHELF_ALIGNMENT_LEFT:
 107       return gfx::Vector2d(
 108           0, std::max(kMinimalAnchorPositionOffset - anchor.y(), 0));
 109     case SHELF_ALIGNMENT_RIGHT:
 110       return gfx::Vector2d(
 111           0, std::max(kMinimalAnchorPositionOffset - anchor.y(), 0));
 112     default:
 113       NOTREACHED();
 114       return gfx::Vector2d();
 115   }
 116 }
 117
 118 }  // namespace
 119
 120 ////////////////////////////////////////////////////////////////////////////////
 121 // AppListController, public:
 122
 123 AppListController::AppListController()
 124     : pagination_model_(new app_list::PaginationModel),
 125       is_visible_(false),
 126       view_(NULL),
 127       should_snap_back_(false) {
 128   Shell::GetInstance()->AddShellObserver(this);
 129   pagination_model_->AddObserver(this);
 130 }
 131
 132 AppListController::~AppListController() {
 133   // Ensures app list view goes before the controller since pagination model
 134   // lives in the controller and app list view would access it on destruction.
 135   if (view_ && view_->GetWidget())
 136     view_->GetWidget()->CloseNow();
 137
 138   Shell::GetInstance()->RemoveShellObserver(this);
 139   pagination_model_->RemoveObserver(this);
 140 }
 141
 142 void AppListController::SetVisible(bool visible, aura::Window* window) {
 143   if (visible == is_visible_)
 144     return;
 145
 146   is_visible_ = visible;
 147
 148   // App list needs to know the new shelf layout in order to calculate its
 149   // UI layout when AppListView visibility changes.
 150   Shell::GetPrimaryRootWindowController()->GetShelfLayoutManager()->
 151       UpdateAutoHideState();
 152
 153   if (view_) {
 154     // Our widget is currently active. When the animation completes we'll hide
 155     // the widget, changing activation. If a menu is shown before the animation
 156     // completes then the activation change triggers the menu to close. By
 157     // deactivating now we ensure there is no activation change when the
 158     // animation completes and any menus stay open.
 159     if (!visible)
 160       view_->GetWidget()->Deactivate();
 161     ScheduleAnimation();
 162   } else if (is_visible_) {
 163     // AppListModel and AppListViewDelegate are owned by AppListView. They
 164     // will be released with AppListView on close.
 165     app_list::AppListView* view = new app_list::AppListView(
 166         Shell::GetInstance()->delegate()->CreateAppListViewDelegate());
 167     aura::Window* root_window = window->GetRootWindow();
 168     aura::Window* container = GetRootWindowController(root_window)->
 169         GetContainer(kShellWindowId_AppListContainer);
 170     if (CommandLine::ForCurrentProcess()->HasSwitch(
 171             app_list::switches::kEnableExperimentalAppList)) {
 172       // The experimental app list is centered over the primary display.
 173       view->InitAsBubbleAtFixedLocation(
 174           NULL,
 175           pagination_model_.get(),
 176           Shell::GetScreen()->GetPrimaryDisplay().bounds().CenterPoint(),
 177           views::BubbleBorder::FLOAT,
 178           true /* border_accepts_events */);
 179     } else if (ash::switches::UseAlternateShelfLayout()) {
 180       gfx::Rect applist_button_bounds = Shelf::ForWindow(container)->
 181           GetAppListButtonView()->GetBoundsInScreen();
 182       // We need the location of the button within the local screen.
 183       applist_button_bounds = ScreenUtil::ConvertRectFromScreen(
 184           root_window,
 185           applist_button_bounds);
 186       view->InitAsBubbleAttachedToAnchor(
 187           container,
 188           pagination_model_.get(),
 189           Shelf::ForWindow(container)->GetAppListButtonView(),
 190           GetAnchorPositionOffsetToShelf(applist_button_bounds,
 191               Shelf::ForWindow(container)->GetAppListButtonView()->
 192                   GetWidget()),
 193           GetBubbleArrow(container),
 194           true /* border_accepts_events */);
 195       view->SetArrowPaintType(views::BubbleBorder::PAINT_NONE);
 196     } else {
 197       view->InitAsBubbleAttachedToAnchor(
 198           container,
 199           pagination_model_.get(),
 200           Shelf::ForWindow(container)->GetAppListButtonView(),
 201           gfx::Vector2d(),
 202           GetBubbleArrow(container),
 203           true /* border_accepts_events */);
 204     }
 205     SetView(view);
 206     // By setting us as DnD recipient, the app list knows that we can
 207     // handle items.
 208     if (!CommandLine::ForCurrentProcess()->HasSwitch(
 209             switches::kAshDisableDragAndDropAppListToLauncher)) {
 210       SetDragAndDropHostOfCurrentAppList(
 211           Shelf::ForWindow(window)->GetDragAndDropHostForAppList());
 212     }
 213   }
 214   // Update applist button status when app list visibility is changed.
 215   Shelf::ForWindow(window)->GetAppListButtonView()->SchedulePaint();
 216 }
 217
 218 bool AppListController::IsVisible() const {
 219   return view_ && view_->GetWidget()->IsVisible();
 220 }
 221
 222 aura::Window* AppListController::GetWindow() {
 223   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 224 }
 225
 226 ////////////////////////////////////////////////////////////////////////////////
 227 // AppListController, private:
 228
 229 void AppListController::SetDragAndDropHostOfCurrentAppList(
 230     app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
 231   if (view_ && is_visible_)
 232     view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
 233 }
 234
 235 void AppListController::SetView(app_list::AppListView* view) {
 236   DCHECK(view_ == NULL);
 237   DCHECK(is_visible_);
 238
 239   view_ = view;
 240   views::Widget* widget = view_->GetWidget();
 241   widget->AddObserver(this);
 242   Shell::GetInstance()->AddPreTargetHandler(this);
 243   Shelf::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 244   widget->GetNativeView()->GetRootWindow()->AddObserver(this);
 245   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 246
 247   view_->ShowWhenReady();
 248 }
 249
 250 void AppListController::ResetView() {
 251   if (!view_)
 252     return;
 253
 254   views::Widget* widget = view_->GetWidget();
 255   widget->RemoveObserver(this);
 256   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 257   Shell::GetInstance()->RemovePreTargetHandler(this);
 258   Shelf::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 259   widget->GetNativeView()->GetRootWindow()->RemoveObserver(this);
 260   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 261   view_ = NULL;
 262 }
 263
 264 void AppListController::ScheduleAnimation() {
 265   // Stop observing previous animation.
 266   StopObservingImplicitAnimations();
 267
 268   views::Widget* widget = view_->GetWidget();
 269   ui::Layer* layer = GetLayer(widget);
 270   layer->GetAnimator()->StopAnimating();
 271
 272   gfx::Rect target_bounds;
 273   if (is_visible_) {
 274     target_bounds = widget->GetWindowBoundsInScreen();
 275     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 276   } else {
 277     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 278                                        widget);
 279   }
 280
 281   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 282   animation.SetTransitionDuration(
 283       base::TimeDelta::FromMilliseconds(
 284           is_visible_ ? 0 : kAnimationDurationMs));
 285   animation.AddObserver(this);
 286
 287   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 288   widget->SetBounds(target_bounds);
 289 }
 290
 291 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 292   if (!view_ || !is_visible_)
 293     return;
 294
 295   // If the event happened on a menu, then the event should not close the app
 296   // list.
 297   aura::Window* target = static_cast<aura::Window*>(event->target());
 298   if (target) {
 299     RootWindowController* root_controller =
 300         GetRootWindowController(target->GetRootWindow());
 301     if (root_controller) {
 302       aura::Window* menu_container = root_controller->GetContainer(
 303           internal::kShellWindowId_MenuContainer);
 304       if (menu_container->Contains(target))
 305         return;
 306       aura::Window* keyboard_container = root_controller->GetContainer(
 307           internal::kShellWindowId_VirtualKeyboardContainer);
 308       if (keyboard_container->Contains(target))
 309         return;
 310     }
 311   }
 312
 313   aura::Window* window = view_->GetWidget()->GetNativeView();
 314   if (!window->Contains(target))
 315     SetVisible(false, window);
 316 }
 317
 318 void AppListController::UpdateBounds() {
 319   if (view_ && is_visible_)
 320     view_->UpdateBounds();
 321 }
 322
 323 ////////////////////////////////////////////////////////////////////////////////
 324 // AppListController, aura::EventFilter implementation:
 325
 326 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 327   if (event->type() == ui::ET_MOUSE_PRESSED)
 328     ProcessLocatedEvent(event);
 329 }
 330
 331 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 332   if (event->type() == ui::ET_GESTURE_TAP_DOWN)
 333     ProcessLocatedEvent(event);
 334 }
 335
 336 ////////////////////////////////////////////////////////////////////////////////
 337 // AppListController,  aura::FocusObserver implementation:
 338
 339 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 340                                         aura::Window* lost_focus) {
 341   if (view_ && is_visible_) {
 342     aura::Window* applist_window = view_->GetWidget()->GetNativeView();
 343     aura::Window* applist_container = applist_window->parent();
 344
 345     if (applist_container->Contains(lost_focus) &&
 346         (!gained_focus || !applist_container->Contains(gained_focus))) {
 347       SetVisible(false, applist_window);
 348     }
 349   }
 350 }
 351
 352 ////////////////////////////////////////////////////////////////////////////////
 353 // AppListController,  aura::WindowObserver implementation:
 354 void AppListController::OnWindowBoundsChanged(aura::Window* root,
 355                                               const gfx::Rect& old_bounds,
 356                                               const gfx::Rect& new_bounds) {
 357   UpdateBounds();
 358 }
 359
 360 ////////////////////////////////////////////////////////////////////////////////
 361 // AppListController, ui::ImplicitAnimationObserver implementation:
 362
 363 void AppListController::OnImplicitAnimationsCompleted() {
 364   if (is_visible_ )
 365     view_->GetWidget()->Activate();
 366   else
 367     view_->GetWidget()->Close();
 368 }
 369
 370 ////////////////////////////////////////////////////////////////////////////////
 371 // AppListController, views::WidgetObserver implementation:
 372
 373 void AppListController::OnWidgetDestroying(views::Widget* widget) {
 374   DCHECK(view_->GetWidget() == widget);
 375   if (is_visible_)
 376     SetVisible(false, widget->GetNativeView());
 377   ResetView();
 378 }
 379
 380 ////////////////////////////////////////////////////////////////////////////////
 381 // AppListController, ShellObserver implementation:
 382 void AppListController::OnShelfAlignmentChanged(aura::Window* root_window) {
 383   if (view_)
 384     view_->SetBubbleArrow(GetBubbleArrow(view_->GetWidget()->GetNativeView()));
 385 }
 386
 387 ////////////////////////////////////////////////////////////////////////////////
 388 // AppListController, ShelfIconObserver implementation:
 389
 390 void AppListController::OnShelfIconPositionsChanged() {
 391   UpdateBounds();
 392 }
 393
 394 ////////////////////////////////////////////////////////////////////////////////
 395 // AppListController, PaginationModelObserver implementation:
 396
 397 void AppListController::TotalPagesChanged() {
 398 }
 399
 400 void AppListController::SelectedPageChanged(int old_selected,
 401                                             int new_selected) {
 402 }
 403
 404 void AppListController::TransitionStarted() {
 405 }
 406
 407 void AppListController::TransitionChanged() {
 408   // |view_| could be NULL when app list is closed with a running transition.
 409   if (!view_)
 410     return;
 411
 412   const app_list::PaginationModel::Transition& transition =
 413       pagination_model_->transition();
 414   if (pagination_model_->is_valid_page(transition.target_page))
 415     return;
 416
 417   views::Widget* widget = view_->GetWidget();
 418   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 419   if (!pagination_model_->IsRevertingCurrentTransition()) {
 420     // Update cached |view_bounds_| if it is the first over-scroll move and
 421     // widget does not have running animations.
 422     if (!should_snap_back_ && !widget_animator->is_animating())
 423       view_bounds_ = widget->GetWindowBoundsInScreen();
 424
 425     const int current_page = pagination_model_->selected_page();
 426     const int dir = transition.target_page > current_page ? -1 : 1;
 427
 428     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 429     const int shift = kMaxOverScrollShift * progress * dir;
 430
 431     gfx::Rect shifted(view_bounds_);
 432     shifted.set_x(shifted.x() + shift);
 433     widget->SetBounds(shifted);
 434     should_snap_back_ = true;
 435   } else if (should_snap_back_) {
 436     should_snap_back_ = false;
 437     ui::ScopedLayerAnimationSettings animation(widget_animator);
 438     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 439         app_list::kOverscrollPageTransitionDurationMs));
 440     widget->SetBounds(view_bounds_);
 441   }
 442 }
 443
 444 }  // namespace internal
 445 }  // namespace ash