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/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 (app_list::switches::IsExperimentalAppListPositionEnabled()) {
 171       // The experimental app list is centered over the primary display.
 172       view->InitAsBubbleAtFixedLocation(
 173           NULL,
 174           pagination_model_.get(),
 175           Shell::GetScreen()->GetPrimaryDisplay().bounds().CenterPoint(),
 176           views::BubbleBorder::FLOAT,
 177           true /* border_accepts_events */);
 178     } else if (ash::switches::UseAlternateShelfLayout()) {
 179       gfx::Rect applist_button_bounds = Shelf::ForWindow(container)->
 180           GetAppListButtonView()->GetBoundsInScreen();
 181       // We need the location of the button within the local screen.
 182       applist_button_bounds = ScreenUtil::ConvertRectFromScreen(
 183           root_window,
 184           applist_button_bounds);
 185       view->InitAsBubbleAttachedToAnchor(
 186           container,
 187           pagination_model_.get(),
 188           Shelf::ForWindow(container)->GetAppListButtonView(),
 189           GetAnchorPositionOffsetToShelf(applist_button_bounds,
 190               Shelf::ForWindow(container)->GetAppListButtonView()->
 191                   GetWidget()),
 192           GetBubbleArrow(container),
 193           true /* border_accepts_events */);
 194       view->SetArrowPaintType(views::BubbleBorder::PAINT_NONE);
 195     } else {
 196       view->InitAsBubbleAttachedToAnchor(
 197           container,
 198           pagination_model_.get(),
 199           Shelf::ForWindow(container)->GetAppListButtonView(),
 200           gfx::Vector2d(),
 201           GetBubbleArrow(container),
 202           true /* border_accepts_events */);
 203     }
 204     SetView(view);
 205     // By setting us as DnD recipient, the app list knows that we can
 206     // handle items.
 207     SetDragAndDropHostOfCurrentAppList(
 208         Shelf::ForWindow(window)->GetDragAndDropHostForAppList());
 209   }
 210   // Update applist button status when app list visibility is changed.
 211   Shelf::ForWindow(window)->GetAppListButtonView()->SchedulePaint();
 212 }
 213
 214 bool AppListController::IsVisible() const {
 215   return view_ && view_->GetWidget()->IsVisible();
 216 }
 217
 218 aura::Window* AppListController::GetWindow() {
 219   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 220 }
 221
 222 ////////////////////////////////////////////////////////////////////////////////
 223 // AppListController, private:
 224
 225 void AppListController::SetDragAndDropHostOfCurrentAppList(
 226     app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
 227   if (view_ && is_visible_)
 228     view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
 229 }
 230
 231 void AppListController::SetView(app_list::AppListView* view) {
 232   DCHECK(view_ == NULL);
 233   DCHECK(is_visible_);
 234
 235   view_ = view;
 236   views::Widget* widget = view_->GetWidget();
 237   widget->AddObserver(this);
 238   Shell::GetInstance()->AddPreTargetHandler(this);
 239   Shelf::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 240   widget->GetNativeView()->GetRootWindow()->AddObserver(this);
 241   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 242
 243   view_->ShowWhenReady();
 244 }
 245
 246 void AppListController::ResetView() {
 247   if (!view_)
 248     return;
 249
 250   views::Widget* widget = view_->GetWidget();
 251   widget->RemoveObserver(this);
 252   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 253   Shell::GetInstance()->RemovePreTargetHandler(this);
 254   Shelf::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 255   widget->GetNativeView()->GetRootWindow()->RemoveObserver(this);
 256   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 257   view_ = NULL;
 258 }
 259
 260 void AppListController::ScheduleAnimation() {
 261   // Stop observing previous animation.
 262   StopObservingImplicitAnimations();
 263
 264   views::Widget* widget = view_->GetWidget();
 265   ui::Layer* layer = GetLayer(widget);
 266   layer->GetAnimator()->StopAnimating();
 267
 268   gfx::Rect target_bounds;
 269   if (is_visible_) {
 270     target_bounds = widget->GetWindowBoundsInScreen();
 271     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 272   } else {
 273     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 274                                        widget);
 275   }
 276
 277   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 278   animation.SetTransitionDuration(
 279       base::TimeDelta::FromMilliseconds(
 280           is_visible_ ? 0 : kAnimationDurationMs));
 281   animation.AddObserver(this);
 282
 283   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 284   widget->SetBounds(target_bounds);
 285 }
 286
 287 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 288   if (!view_ || !is_visible_)
 289     return;
 290
 291   // If the event happened on a menu, then the event should not close the app
 292   // list.
 293   aura::Window* target = static_cast<aura::Window*>(event->target());
 294   if (target) {
 295     RootWindowController* root_controller =
 296         GetRootWindowController(target->GetRootWindow());
 297     if (root_controller) {
 298       aura::Window* menu_container = root_controller->GetContainer(
 299           internal::kShellWindowId_MenuContainer);
 300       if (menu_container->Contains(target))
 301         return;
 302       aura::Window* keyboard_container = root_controller->GetContainer(
 303           internal::kShellWindowId_VirtualKeyboardContainer);
 304       if (keyboard_container->Contains(target))
 305         return;
 306     }
 307   }
 308
 309   aura::Window* window = view_->GetWidget()->GetNativeView()->parent();
 310   if (!window->Contains(target))
 311     SetVisible(false, window);
 312 }
 313
 314 void AppListController::UpdateBounds() {
 315   if (view_ && is_visible_)
 316     view_->UpdateBounds();
 317 }
 318
 319 ////////////////////////////////////////////////////////////////////////////////
 320 // AppListController, aura::EventFilter implementation:
 321
 322 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 323   if (event->type() == ui::ET_MOUSE_PRESSED)
 324     ProcessLocatedEvent(event);
 325 }
 326
 327 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 328   if (event->type() == ui::ET_GESTURE_TAP_DOWN)
 329     ProcessLocatedEvent(event);
 330 }
 331
 332 ////////////////////////////////////////////////////////////////////////////////
 333 // AppListController,  aura::FocusObserver implementation:
 334
 335 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 336                                         aura::Window* lost_focus) {
 337   if (view_ && is_visible_) {
 338     aura::Window* applist_window = view_->GetWidget()->GetNativeView();
 339     aura::Window* applist_container = applist_window->parent();
 340
 341     if (applist_container->Contains(lost_focus) &&
 342         (!gained_focus || !applist_container->Contains(gained_focus))) {
 343       SetVisible(false, applist_window);
 344     }
 345   }
 346 }
 347
 348 ////////////////////////////////////////////////////////////////////////////////
 349 // AppListController,  aura::WindowObserver implementation:
 350 void AppListController::OnWindowBoundsChanged(aura::Window* root,
 351                                               const gfx::Rect& old_bounds,
 352                                               const gfx::Rect& new_bounds) {
 353   UpdateBounds();
 354 }
 355
 356 ////////////////////////////////////////////////////////////////////////////////
 357 // AppListController, ui::ImplicitAnimationObserver implementation:
 358
 359 void AppListController::OnImplicitAnimationsCompleted() {
 360   if (is_visible_ )
 361     view_->GetWidget()->Activate();
 362   else
 363     view_->GetWidget()->Close();
 364 }
 365
 366 ////////////////////////////////////////////////////////////////////////////////
 367 // AppListController, views::WidgetObserver implementation:
 368
 369 void AppListController::OnWidgetDestroying(views::Widget* widget) {
 370   DCHECK(view_->GetWidget() == widget);
 371   if (is_visible_)
 372     SetVisible(false, widget->GetNativeView());
 373   ResetView();
 374 }
 375
 376 ////////////////////////////////////////////////////////////////////////////////
 377 // AppListController, ShellObserver implementation:
 378 void AppListController::OnShelfAlignmentChanged(aura::Window* root_window) {
 379   if (view_)
 380     view_->SetBubbleArrow(GetBubbleArrow(view_->GetWidget()->GetNativeView()));
 381 }
 382
 383 ////////////////////////////////////////////////////////////////////////////////
 384 // AppListController, ShelfIconObserver implementation:
 385
 386 void AppListController::OnShelfIconPositionsChanged() {
 387   UpdateBounds();
 388 }
 389
 390 ////////////////////////////////////////////////////////////////////////////////
 391 // AppListController, PaginationModelObserver implementation:
 392
 393 void AppListController::TotalPagesChanged() {
 394 }
 395
 396 void AppListController::SelectedPageChanged(int old_selected,
 397                                             int new_selected) {
 398 }
 399
 400 void AppListController::TransitionStarted() {
 401 }
 402
 403 void AppListController::TransitionChanged() {
 404   // |view_| could be NULL when app list is closed with a running transition.
 405   if (!view_)
 406     return;
 407
 408   const app_list::PaginationModel::Transition& transition =
 409       pagination_model_->transition();
 410   if (pagination_model_->is_valid_page(transition.target_page))
 411     return;
 412
 413   views::Widget* widget = view_->GetWidget();
 414   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 415   if (!pagination_model_->IsRevertingCurrentTransition()) {
 416     // Update cached |view_bounds_| if it is the first over-scroll move and
 417     // widget does not have running animations.
 418     if (!should_snap_back_ && !widget_animator->is_animating())
 419       view_bounds_ = widget->GetWindowBoundsInScreen();
 420
 421     const int current_page = pagination_model_->selected_page();
 422     const int dir = transition.target_page > current_page ? -1 : 1;
 423
 424     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 425     const int shift = kMaxOverScrollShift * progress * dir;
 426
 427     gfx::Rect shifted(view_bounds_);
 428     shifted.set_x(shifted.x() + shift);
 429     widget->SetBounds(shifted);
 430     should_snap_back_ = true;
 431   } else if (should_snap_back_) {
 432     should_snap_back_ = false;
 433     ui::ScopedLayerAnimationSettings animation(widget_animator);
 434     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 435         app_list::kOverscrollPageTransitionDurationMs));
 436     widget->SetBounds(view_bounds_);
 437   }
 438 }
 439
 440 }  // namespace internal
 441 }  // namespace ash