src/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/launcher/launcher.h"
   9 #include "ash/root_window_controller.h"
  10 #include "ash/screen_ash.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/pagination_model.h"
  18 #include "ui/app_list/views/app_list_view.h"
  19 #include "ui/aura/client/focus_client.h"
  20 #include "ui/aura/root_window.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/compositor/layer.h"
  23 #include "ui/compositor/scoped_layer_animation_settings.h"
  24 #include "ui/events/event.h"
  25 #include "ui/gfx/transform_util.h"
  26 #include "ui/views/widget/widget.h"
  27
  28 namespace ash {
  29 namespace internal {
  30
  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 launcher.
  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::ForLauncher(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 }  // namespace
 118
 119 ////////////////////////////////////////////////////////////////////////////////
 120 // AppListController, public:
 121
 122 AppListController::AppListController()
 123     : pagination_model_(new app_list::PaginationModel),
 124       is_visible_(false),
 125       view_(NULL),
 126       should_snap_back_(false) {
 127   Shell::GetInstance()->AddShellObserver(this);
 128   pagination_model_->AddObserver(this);
 129 }
 130
 131 AppListController::~AppListController() {
 132   // Ensures app list view goes before the controller since pagination model
 133   // lives in the controller and app list view would access it on destruction.
 134   if (view_ && view_->GetWidget())
 135     view_->GetWidget()->CloseNow();
 136
 137   Shell::GetInstance()->RemoveShellObserver(this);
 138   pagination_model_->RemoveObserver(this);
 139 }
 140
 141 void AppListController::SetVisible(bool visible, aura::Window* window) {
 142   if (visible == is_visible_)
 143     return;
 144
 145   is_visible_ = visible;
 146
 147   // App list needs to know the new shelf layout in order to calculate its
 148   // UI layout when AppListView visibility changes.
 149   Shell::GetPrimaryRootWindowController()->GetShelfLayoutManager()->
 150       UpdateAutoHideState();
 151
 152   if (view_) {
 153     // Our widget is currently active. When the animation completes we'll hide
 154     // the widget, changing activation. If a menu is shown before the animation
 155     // completes then the activation change triggers the menu to close. By
 156     // deactivating now we ensure there is no activation change when the
 157     // animation completes and any menus stay open.
 158     if (!visible)
 159       view_->GetWidget()->Deactivate();
 160     ScheduleAnimation();
 161   } else if (is_visible_) {
 162     // AppListModel and AppListViewDelegate are owned by AppListView. They
 163     // will be released with AppListView on close.
 164     app_list::AppListView* view = new app_list::AppListView(
 165         Shell::GetInstance()->delegate()->CreateAppListViewDelegate());
 166     aura::Window* root_window = window->GetRootWindow();
 167     aura::Window* container = GetRootWindowController(root_window)->
 168         GetContainer(kShellWindowId_AppListContainer);
 169     if (ash::switches::UseAlternateShelfLayout()) {
 170       gfx::Rect applist_button_bounds = Launcher::ForWindow(container)->
 171           GetAppListButtonView()->GetBoundsInScreen();
 172       // We need the location of the button within the local screen.
 173       applist_button_bounds = ash::ScreenAsh::ConvertRectFromScreen(
 174           root_window,
 175           applist_button_bounds);
 176       view->InitAsBubbleAttachedToAnchor(
 177           container,
 178           pagination_model_.get(),
 179           Launcher::ForWindow(container)->GetAppListButtonView(),
 180           GetAnchorPositionOffsetToShelf(applist_button_bounds,
 181               Launcher::ForWindow(container)->GetAppListButtonView()->
 182                   GetWidget()),
 183           GetBubbleArrow(container),
 184           true /* border_accepts_events */);
 185       view->SetArrowPaintType(views::BubbleBorder::PAINT_NONE);
 186     } else {
 187       view->InitAsBubbleAttachedToAnchor(
 188           container,
 189           pagination_model_.get(),
 190           Launcher::ForWindow(container)->GetAppListButtonView(),
 191           gfx::Vector2d(),
 192           GetBubbleArrow(container),
 193           true /* border_accepts_events */);
 194     }
 195     SetView(view);
 196     // By setting us as DnD recipient, the app list knows that we can
 197     // handle items.
 198     if (!CommandLine::ForCurrentProcess()->HasSwitch(
 199             ash::switches::kAshDisableDragAndDropAppListToLauncher)) {
 200       SetDragAndDropHostOfCurrentAppList(
 201           Launcher::ForWindow(window)->GetDragAndDropHostForAppList());
 202     }
 203   }
 204   // Update applist button status when app list visibility is changed.
 205   Launcher::ForWindow(window)->GetAppListButtonView()->SchedulePaint();
 206 }
 207
 208 bool AppListController::IsVisible() const {
 209   return view_ && view_->GetWidget()->IsVisible();
 210 }
 211
 212 aura::Window* AppListController::GetWindow() {
 213   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 214 }
 215
 216 ////////////////////////////////////////////////////////////////////////////////
 217 // AppListController, private:
 218
 219 void AppListController::SetDragAndDropHostOfCurrentAppList(
 220     app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
 221   if (view_ && is_visible_)
 222     view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
 223 }
 224
 225 void AppListController::SetView(app_list::AppListView* view) {
 226   DCHECK(view_ == NULL);
 227   DCHECK(is_visible_);
 228
 229   view_ = view;
 230   views::Widget* widget = view_->GetWidget();
 231   widget->AddObserver(this);
 232   Shell::GetInstance()->AddPreTargetHandler(this);
 233   Launcher::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 234   widget->GetNativeView()->GetRootWindow()->AddObserver(this);
 235   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 236
 237   view_->ShowWhenReady();
 238 }
 239
 240 void AppListController::ResetView() {
 241   if (!view_)
 242     return;
 243
 244   views::Widget* widget = view_->GetWidget();
 245   widget->RemoveObserver(this);
 246   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 247   Shell::GetInstance()->RemovePreTargetHandler(this);
 248   Launcher::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 249   widget->GetNativeView()->GetRootWindow()->RemoveObserver(this);
 250   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 251   view_ = NULL;
 252 }
 253
 254 void AppListController::ScheduleAnimation() {
 255   // Stop observing previous animation.
 256   StopObservingImplicitAnimations();
 257
 258   views::Widget* widget = view_->GetWidget();
 259   ui::Layer* layer = GetLayer(widget);
 260   layer->GetAnimator()->StopAnimating();
 261
 262   gfx::Rect target_bounds;
 263   if (is_visible_) {
 264     target_bounds = widget->GetWindowBoundsInScreen();
 265     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 266   } else {
 267     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 268                                        widget);
 269   }
 270
 271   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 272   animation.SetTransitionDuration(
 273       base::TimeDelta::FromMilliseconds(
 274           is_visible_ ? 0 : kAnimationDurationMs));
 275   animation.AddObserver(this);
 276
 277   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 278   widget->SetBounds(target_bounds);
 279 }
 280
 281 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 282   // If the event happened on a menu, then the event should not close the app
 283   // list.
 284   aura::Window* target = static_cast<aura::Window*>(event->target());
 285   if (target) {
 286     RootWindowController* root_controller =
 287         GetRootWindowController(target->GetRootWindow());
 288     if (root_controller) {
 289       aura::Window* menu_container = root_controller->GetContainer(
 290           ash::internal::kShellWindowId_MenuContainer);
 291       if (menu_container->Contains(target))
 292         return;
 293     }
 294   }
 295
 296   if (view_ && is_visible_) {
 297     aura::Window* window = view_->GetWidget()->GetNativeView();
 298     gfx::Point window_local_point(event->root_location());
 299     aura::Window::ConvertPointToTarget(window->GetRootWindow(),
 300                                        window,
 301                                        &window_local_point);
 302     // Use HitTest to respect the hit test mask of the bubble.
 303     if (!window->HitTest(window_local_point))
 304       SetVisible(false, window);
 305   }
 306 }
 307
 308 void AppListController::UpdateBounds() {
 309   if (view_ && is_visible_)
 310     view_->UpdateBounds();
 311 }
 312
 313 ////////////////////////////////////////////////////////////////////////////////
 314 // AppListController, aura::EventFilter implementation:
 315
 316 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 317   if (event->type() == ui::ET_MOUSE_PRESSED)
 318     ProcessLocatedEvent(event);
 319 }
 320
 321 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 322   if (event->type() == ui::ET_GESTURE_TAP_DOWN)
 323     ProcessLocatedEvent(event);
 324 }
 325
 326 ////////////////////////////////////////////////////////////////////////////////
 327 // AppListController,  aura::FocusObserver implementation:
 328
 329 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 330                                         aura::Window* lost_focus) {
 331   if (view_ && is_visible_) {
 332     aura::Window* applist_window = view_->GetWidget()->GetNativeView();
 333     aura::Window* applist_container = applist_window->parent();
 334
 335     if (applist_container->Contains(lost_focus) &&
 336         (!gained_focus || !applist_container->Contains(gained_focus))) {
 337       SetVisible(false, applist_window);
 338     }
 339   }
 340 }
 341
 342 ////////////////////////////////////////////////////////////////////////////////
 343 // AppListController,  aura::WindowObserver implementation:
 344 void AppListController::OnWindowBoundsChanged(aura::Window* root,
 345                                               const gfx::Rect& old_bounds,
 346                                               const gfx::Rect& new_bounds) {
 347   UpdateBounds();
 348 }
 349
 350 ////////////////////////////////////////////////////////////////////////////////
 351 // AppListController, ui::ImplicitAnimationObserver implementation:
 352
 353 void AppListController::OnImplicitAnimationsCompleted() {
 354   if (is_visible_ )
 355     view_->GetWidget()->Activate();
 356   else
 357     view_->GetWidget()->Close();
 358 }
 359
 360 ////////////////////////////////////////////////////////////////////////////////
 361 // AppListController, views::WidgetObserver implementation:
 362
 363 void AppListController::OnWidgetDestroying(views::Widget* widget) {
 364   DCHECK(view_->GetWidget() == widget);
 365   if (is_visible_)
 366     SetVisible(false, widget->GetNativeView());
 367   ResetView();
 368 }
 369
 370 ////////////////////////////////////////////////////////////////////////////////
 371 // AppListController, ShellObserver implementation:
 372 void AppListController::OnShelfAlignmentChanged(aura::Window* root_window) {
 373   if (view_)
 374     view_->SetBubbleArrow(GetBubbleArrow(view_->GetWidget()->GetNativeView()));
 375 }
 376
 377 ////////////////////////////////////////////////////////////////////////////////
 378 // AppListController, ShelfIconObserver implementation:
 379
 380 void AppListController::OnShelfIconPositionsChanged() {
 381   UpdateBounds();
 382 }
 383
 384 ////////////////////////////////////////////////////////////////////////////////
 385 // AppListController, PaginationModelObserver implementation:
 386
 387 void AppListController::TotalPagesChanged() {
 388 }
 389
 390 void AppListController::SelectedPageChanged(int old_selected,
 391                                             int new_selected) {
 392 }
 393
 394 void AppListController::TransitionStarted() {
 395 }
 396
 397 void AppListController::TransitionChanged() {
 398   // |view_| could be NULL when app list is closed with a running transition.
 399   if (!view_)
 400     return;
 401
 402   const app_list::PaginationModel::Transition& transition =
 403       pagination_model_->transition();
 404   if (pagination_model_->is_valid_page(transition.target_page))
 405     return;
 406
 407   views::Widget* widget = view_->GetWidget();
 408   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 409   if (!pagination_model_->IsRevertingCurrentTransition()) {
 410     // Update cached |view_bounds_| if it is the first over-scroll move and
 411     // widget does not have running animations.
 412     if (!should_snap_back_ && !widget_animator->is_animating())
 413       view_bounds_ = widget->GetWindowBoundsInScreen();
 414
 415     const int current_page = pagination_model_->selected_page();
 416     const int dir = transition.target_page > current_page ? -1 : 1;
 417
 418     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 419     const int shift = kMaxOverScrollShift * progress * dir;
 420
 421     gfx::Rect shifted(view_bounds_);
 422     shifted.set_x(shifted.x() + shift);
 423     widget->SetBounds(shifted);
 424     should_snap_back_ = true;
 425   } else if (should_snap_back_) {
 426     should_snap_back_ = false;
 427     ui::ScopedLayerAnimationSettings animation(widget_animator);
 428     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 429         app_list::kOverscrollPageTransitionDurationMs));
 430     widget->SetBounds(view_bounds_);
 431   }
 432 }
 433
 434 }  // namespace internal
 435 }  // namespace ash