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/keyboard/keyboard_controller.h"
  28 #include "ui/views/widget/widget.h"
  29
  30 namespace ash {
  31 namespace {
  32
  33 // Duration for show/hide animation in milliseconds.
  34 const int kAnimationDurationMs = 200;
  35
  36 // Offset in pixels to animation away/towards the shelf.
  37 const int kAnimationOffset = 8;
  38
  39 // The maximum shift in pixels when over-scroll happens.
  40 const int kMaxOverScrollShift = 48;
  41
  42 // The minimal anchor position offset to make sure that the bubble is still on
  43 // the screen with 8 pixels spacing on the left / right. This constant is a
  44 // result of minimal bubble arrow sizes and offsets.
  45 const int kMinimalAnchorPositionOffset = 57;
  46
  47 ui::Layer* GetLayer(views::Widget* widget) {
  48   return widget->GetNativeView()->layer();
  49 }
  50
  51 // Gets arrow location based on shelf alignment.
  52 views::BubbleBorder::Arrow GetBubbleArrow(aura::Window* window) {
  53   DCHECK(Shell::HasInstance());
  54   return ShelfLayoutManager::ForShelf(window)->
  55       SelectValueForShelfAlignment(
  56           views::BubbleBorder::BOTTOM_CENTER,
  57           views::BubbleBorder::LEFT_CENTER,
  58           views::BubbleBorder::RIGHT_CENTER,
  59           views::BubbleBorder::TOP_CENTER);
  60 }
  61
  62 // Offset given |rect| towards shelf.
  63 gfx::Rect OffsetTowardsShelf(const gfx::Rect& rect, views::Widget* widget) {
  64   DCHECK(Shell::HasInstance());
  65   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  66       widget->GetNativeView()->GetRootWindow());
  67   gfx::Rect offseted(rect);
  68   switch (shelf_alignment) {
  69     case SHELF_ALIGNMENT_BOTTOM:
  70       offseted.Offset(0, kAnimationOffset);
  71       break;
  72     case SHELF_ALIGNMENT_LEFT:
  73       offseted.Offset(-kAnimationOffset, 0);
  74       break;
  75     case SHELF_ALIGNMENT_RIGHT:
  76       offseted.Offset(kAnimationOffset, 0);
  77       break;
  78     case SHELF_ALIGNMENT_TOP:
  79       offseted.Offset(0, -kAnimationOffset);
  80       break;
  81   }
  82
  83   return offseted;
  84 }
  85
  86 // Using |button_bounds|, determine the anchor offset so that the bubble gets
  87 // shown above the shelf (used for the alternate shelf theme).
  88 gfx::Vector2d GetAnchorPositionOffsetToShelf(
  89     const gfx::Rect& button_bounds, views::Widget* widget) {
  90   DCHECK(Shell::HasInstance());
  91   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  92       widget->GetNativeView()->GetRootWindow());
  93   gfx::Point anchor(button_bounds.CenterPoint());
  94   switch (shelf_alignment) {
  95     case SHELF_ALIGNMENT_TOP:
  96     case SHELF_ALIGNMENT_BOTTOM:
  97       if (base::i18n::IsRTL()) {
  98         int screen_width = widget->GetWorkAreaBoundsInScreen().width();
  99         return gfx::Vector2d(
 100             std::min(screen_width - kMinimalAnchorPositionOffset - anchor.x(),
 101                      0), 0);
 102       }
 103       return gfx::Vector2d(
 104           std::max(kMinimalAnchorPositionOffset - anchor.x(), 0), 0);
 105     case SHELF_ALIGNMENT_LEFT:
 106       return gfx::Vector2d(
 107           0, std::max(kMinimalAnchorPositionOffset - anchor.y(), 0));
 108     case SHELF_ALIGNMENT_RIGHT:
 109       return gfx::Vector2d(
 110           0, std::max(kMinimalAnchorPositionOffset - anchor.y(), 0));
 111     default:
 112       NOTREACHED();
 113       return gfx::Vector2d();
 114   }
 115 }
 116
 117 // Gets the point at the center of the screen, excluding the virtual keyboard.
 118 gfx::Point GetScreenCenter() {
 119   gfx::Rect bounds = Shell::GetScreen()->GetPrimaryDisplay().bounds();
 120
 121   // If the virtual keyboard is active, subtract it from the display bounds, so
 122   // that the app list is centered in the non-keyboard area of the display.
 123   // (Note that work_area excludes the keyboard, but it doesn't get updated
 124   // until after this function is called.)
 125   keyboard::KeyboardController* keyboard_controller =
 126       keyboard::KeyboardController::GetInstance();
 127   if (keyboard_controller && keyboard_controller->keyboard_visible())
 128     bounds.Subtract(keyboard_controller->current_keyboard_bounds());
 129
 130   return bounds.CenterPoint();
 131 }
 132
 133 }  // namespace
 134
 135 ////////////////////////////////////////////////////////////////////////////////
 136 // AppListController, public:
 137
 138 AppListController::AppListController()
 139     : pagination_model_(new app_list::PaginationModel),
 140       is_visible_(false),
 141       is_centered_(false),
 142       view_(NULL),
 143       should_snap_back_(false) {
 144   Shell::GetInstance()->AddShellObserver(this);
 145   pagination_model_->AddObserver(this);
 146 }
 147
 148 AppListController::~AppListController() {
 149   // Ensures app list view goes before the controller since pagination model
 150   // lives in the controller and app list view would access it on destruction.
 151   if (view_ && view_->GetWidget())
 152     view_->GetWidget()->CloseNow();
 153
 154   Shell::GetInstance()->RemoveShellObserver(this);
 155   pagination_model_->RemoveObserver(this);
 156 }
 157
 158 void AppListController::SetVisible(bool visible, aura::Window* window) {
 159   if (visible == is_visible_)
 160     return;
 161
 162   is_visible_ = visible;
 163
 164   // App list needs to know the new shelf layout in order to calculate its
 165   // UI layout when AppListView visibility changes.
 166   Shell::GetPrimaryRootWindowController()->GetShelfLayoutManager()->
 167       UpdateAutoHideState();
 168
 169   if (view_) {
 170     // Our widget is currently active. When the animation completes we'll hide
 171     // the widget, changing activation. If a menu is shown before the animation
 172     // completes then the activation change triggers the menu to close. By
 173     // deactivating now we ensure there is no activation change when the
 174     // animation completes and any menus stay open.
 175     if (!visible)
 176       view_->GetWidget()->Deactivate();
 177     ScheduleAnimation();
 178   } else if (is_visible_) {
 179     // AppListModel and AppListViewDelegate are owned by AppListView. They
 180     // will be released with AppListView on close.
 181     app_list::AppListView* view = new app_list::AppListView(
 182         Shell::GetInstance()->delegate()->CreateAppListViewDelegate());
 183     aura::Window* root_window = window->GetRootWindow();
 184     aura::Window* container = GetRootWindowController(root_window)->
 185         GetContainer(kShellWindowId_AppListContainer);
 186     is_centered_ = app_list::switches::IsCenteredAppListEnabled();
 187     if (is_centered_) {
 188       // The experimental app list is centered over the primary display.
 189       view->InitAsBubbleAtFixedLocation(
 190           NULL,
 191           pagination_model_.get(),
 192           GetScreenCenter(),
 193           views::BubbleBorder::FLOAT,
 194           true /* border_accepts_events */);
 195     } else {
 196       gfx::Rect applist_button_bounds = Shelf::ForWindow(container)->
 197           GetAppListButtonView()->GetBoundsInScreen();
 198       // We need the location of the button within the local screen.
 199       applist_button_bounds = ScreenUtil::ConvertRectFromScreen(
 200           root_window,
 201           applist_button_bounds);
 202       view->InitAsBubbleAttachedToAnchor(
 203           container,
 204           pagination_model_.get(),
 205           Shelf::ForWindow(container)->GetAppListButtonView(),
 206           GetAnchorPositionOffsetToShelf(applist_button_bounds,
 207               Shelf::ForWindow(container)->GetAppListButtonView()->
 208                   GetWidget()),
 209           GetBubbleArrow(container),
 210           true /* border_accepts_events */);
 211       view->SetArrowPaintType(views::BubbleBorder::PAINT_NONE);
 212     }
 213     SetView(view);
 214     // By setting us as DnD recipient, the app list knows that we can
 215     // handle items.
 216     SetDragAndDropHostOfCurrentAppList(
 217         Shelf::ForWindow(window)->GetDragAndDropHostForAppList());
 218   }
 219   // Update applist button status when app list visibility is changed.
 220   Shelf::ForWindow(window)->GetAppListButtonView()->SchedulePaint();
 221 }
 222
 223 bool AppListController::IsVisible() const {
 224   return view_ && view_->GetWidget()->IsVisible();
 225 }
 226
 227 aura::Window* AppListController::GetWindow() {
 228   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 229 }
 230
 231 ////////////////////////////////////////////////////////////////////////////////
 232 // AppListController, private:
 233
 234 void AppListController::SetDragAndDropHostOfCurrentAppList(
 235     app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
 236   if (view_ && is_visible_)
 237     view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
 238 }
 239
 240 void AppListController::SetView(app_list::AppListView* view) {
 241   DCHECK(view_ == NULL);
 242   DCHECK(is_visible_);
 243
 244   view_ = view;
 245   views::Widget* widget = view_->GetWidget();
 246   widget->AddObserver(this);
 247   keyboard::KeyboardController* keyboard_controller =
 248       keyboard::KeyboardController::GetInstance();
 249   if (keyboard_controller)
 250     keyboard_controller->AddObserver(this);
 251   Shell::GetInstance()->AddPreTargetHandler(this);
 252   Shelf::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 253   widget->GetNativeView()->GetRootWindow()->AddObserver(this);
 254   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 255
 256   view_->ShowWhenReady();
 257 }
 258
 259 void AppListController::ResetView() {
 260   if (!view_)
 261     return;
 262
 263   views::Widget* widget = view_->GetWidget();
 264   widget->RemoveObserver(this);
 265   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 266   keyboard::KeyboardController* keyboard_controller =
 267       keyboard::KeyboardController::GetInstance();
 268   if (keyboard_controller)
 269     keyboard_controller->RemoveObserver(this);
 270   Shell::GetInstance()->RemovePreTargetHandler(this);
 271   Shelf::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 272   widget->GetNativeView()->GetRootWindow()->RemoveObserver(this);
 273   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 274   view_ = NULL;
 275 }
 276
 277 void AppListController::ScheduleAnimation() {
 278   // Stop observing previous animation.
 279   StopObservingImplicitAnimations();
 280
 281   views::Widget* widget = view_->GetWidget();
 282   ui::Layer* layer = GetLayer(widget);
 283   layer->GetAnimator()->StopAnimating();
 284
 285   gfx::Rect target_bounds;
 286   if (is_visible_) {
 287     target_bounds = widget->GetWindowBoundsInScreen();
 288     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 289   } else {
 290     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 291                                        widget);
 292   }
 293
 294   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 295   animation.SetTransitionDuration(
 296       base::TimeDelta::FromMilliseconds(
 297           is_visible_ ? 0 : kAnimationDurationMs));
 298   animation.AddObserver(this);
 299
 300   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 301   widget->SetBounds(target_bounds);
 302 }
 303
 304 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 305   if (!view_ || !is_visible_)
 306     return;
 307
 308   // If the event happened on a menu, then the event should not close the app
 309   // list.
 310   aura::Window* target = static_cast<aura::Window*>(event->target());
 311   if (target) {
 312     RootWindowController* root_controller =
 313         GetRootWindowController(target->GetRootWindow());
 314     if (root_controller) {
 315       aura::Window* menu_container =
 316           root_controller->GetContainer(kShellWindowId_MenuContainer);
 317       if (menu_container->Contains(target))
 318         return;
 319       aura::Window* keyboard_container = root_controller->GetContainer(
 320           kShellWindowId_VirtualKeyboardContainer);
 321       if (keyboard_container->Contains(target))
 322         return;
 323     }
 324   }
 325
 326   aura::Window* window = view_->GetWidget()->GetNativeView()->parent();
 327   if (!window->Contains(target))
 328     SetVisible(false, window);
 329 }
 330
 331 void AppListController::UpdateBounds() {
 332   if (!view_ || !is_visible_)
 333     return;
 334
 335   view_->UpdateBounds();
 336
 337   if (is_centered_)
 338     view_->SetAnchorPoint(GetScreenCenter());
 339 }
 340
 341 ////////////////////////////////////////////////////////////////////////////////
 342 // AppListController, aura::EventFilter implementation:
 343
 344 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 345   if (event->type() == ui::ET_MOUSE_PRESSED)
 346     ProcessLocatedEvent(event);
 347 }
 348
 349 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 350   if (event->type() == ui::ET_GESTURE_TAP_DOWN)
 351     ProcessLocatedEvent(event);
 352 }
 353
 354 ////////////////////////////////////////////////////////////////////////////////
 355 // AppListController,  aura::FocusObserver implementation:
 356
 357 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 358                                         aura::Window* lost_focus) {
 359   if (view_ && is_visible_) {
 360     aura::Window* applist_window = view_->GetWidget()->GetNativeView();
 361     aura::Window* applist_container = applist_window->parent();
 362
 363     if (applist_container->Contains(lost_focus) &&
 364         (!gained_focus || !applist_container->Contains(gained_focus))) {
 365       SetVisible(false, applist_window);
 366     }
 367   }
 368 }
 369
 370 ////////////////////////////////////////////////////////////////////////////////
 371 // AppListController,  aura::WindowObserver implementation:
 372 void AppListController::OnWindowBoundsChanged(aura::Window* root,
 373                                               const gfx::Rect& old_bounds,
 374                                               const gfx::Rect& new_bounds) {
 375   UpdateBounds();
 376 }
 377
 378 ////////////////////////////////////////////////////////////////////////////////
 379 // AppListController, ui::ImplicitAnimationObserver implementation:
 380
 381 void AppListController::OnImplicitAnimationsCompleted() {
 382   if (is_visible_ )
 383     view_->GetWidget()->Activate();
 384   else
 385     view_->GetWidget()->Close();
 386 }
 387
 388 ////////////////////////////////////////////////////////////////////////////////
 389 // AppListController, views::WidgetObserver implementation:
 390
 391 void AppListController::OnWidgetDestroying(views::Widget* widget) {
 392   DCHECK(view_->GetWidget() == widget);
 393   if (is_visible_)
 394     SetVisible(false, widget->GetNativeView());
 395   ResetView();
 396 }
 397
 398 ////////////////////////////////////////////////////////////////////////////////
 399 // AppListController, keyboard::KeyboardControllerObserver implementation:
 400
 401 void AppListController::OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) {
 402   UpdateBounds();
 403 }
 404
 405 ////////////////////////////////////////////////////////////////////////////////
 406 // AppListController, ShellObserver implementation:
 407 void AppListController::OnShelfAlignmentChanged(aura::Window* root_window) {
 408   if (view_)
 409     view_->SetBubbleArrow(GetBubbleArrow(view_->GetWidget()->GetNativeView()));
 410 }
 411
 412 ////////////////////////////////////////////////////////////////////////////////
 413 // AppListController, ShelfIconObserver implementation:
 414
 415 void AppListController::OnShelfIconPositionsChanged() {
 416   UpdateBounds();
 417 }
 418
 419 ////////////////////////////////////////////////////////////////////////////////
 420 // AppListController, PaginationModelObserver implementation:
 421
 422 void AppListController::TotalPagesChanged() {
 423 }
 424
 425 void AppListController::SelectedPageChanged(int old_selected,
 426                                             int new_selected) {
 427 }
 428
 429 void AppListController::TransitionStarted() {
 430 }
 431
 432 void AppListController::TransitionChanged() {
 433   // |view_| could be NULL when app list is closed with a running transition.
 434   if (!view_)
 435     return;
 436
 437   const app_list::PaginationModel::Transition& transition =
 438       pagination_model_->transition();
 439   if (pagination_model_->is_valid_page(transition.target_page))
 440     return;
 441
 442   views::Widget* widget = view_->GetWidget();
 443   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 444   if (!pagination_model_->IsRevertingCurrentTransition()) {
 445     // Update cached |view_bounds_| if it is the first over-scroll move and
 446     // widget does not have running animations.
 447     if (!should_snap_back_ && !widget_animator->is_animating())
 448       view_bounds_ = widget->GetWindowBoundsInScreen();
 449
 450     const int current_page = pagination_model_->selected_page();
 451     const int dir = transition.target_page > current_page ? -1 : 1;
 452
 453     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 454     const int shift = kMaxOverScrollShift * progress * dir;
 455
 456     gfx::Rect shifted(view_bounds_);
 457     shifted.set_x(shifted.x() + shift);
 458     widget->SetBounds(shifted);
 459     should_snap_back_ = true;
 460   } else if (should_snap_back_) {
 461     should_snap_back_ = false;
 462     ui::ScopedLayerAnimationSettings animation(widget_animator);
 463     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 464         app_list::kOverscrollPageTransitionDurationMs));
 465     widget->SetBounds(view_bounds_);
 466   }
 467 }
 468
 469 }  // namespace ash