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/launcher/launcher.h"
   8 #include "ash/root_window_controller.h"
   9 #include "ash/shell.h"
  10 #include "ash/shell_delegate.h"
  11 #include "ash/shell_window_ids.h"
  12 #include "ash/wm/property_util.h"
  13 #include "ash/wm/shelf_layout_manager.h"
  14 #include "ui/app_list/app_list_constants.h"
  15 #include "ui/app_list/app_list_view.h"
  16 #include "ui/app_list/pagination_model.h"
  17 #include "ui/aura/client/focus_client.h"
  18 #include "ui/aura/root_window.h"
  19 #include "ui/aura/window.h"
  20 #include "ui/base/events/event.h"
  21 #include "ui/compositor/layer.h"
  22 #include "ui/compositor/scoped_layer_animation_settings.h"
  23 #include "ui/gfx/transform_util.h"
  24 #include "ui/views/widget/widget.h"
  25
  26 namespace ash {
  27 namespace internal {
  28
  29 namespace {
  30
  31 // Duration for show/hide animation in milliseconds.
  32 const int kAnimationDurationMs = 200;
  33
  34 // Offset in pixels to animation away/towards the launcher.
  35 const int kAnimationOffset = 8;
  36
  37 // The maximum shift in pixels when over-scroll happens.
  38 const int kMaxOverScrollShift = 48;
  39
  40 ui::Layer* GetLayer(views::Widget* widget) {
  41   return widget->GetNativeView()->layer();
  42 }
  43
  44 // Gets arrow location based on shelf alignment.
  45 views::BubbleBorder::ArrowLocation GetBubbleArrowLocation(
  46     aura::Window* window) {
  47   DCHECK(Shell::HasInstance());
  48   return ShelfLayoutManager::ForLauncher(window)->
  49       SelectValueForShelfAlignment(
  50           views::BubbleBorder::BOTTOM_CENTER,
  51           views::BubbleBorder::LEFT_CENTER,
  52           views::BubbleBorder::RIGHT_CENTER);
  53 }
  54
  55 // Offset given |rect| towards shelf.
  56 gfx::Rect OffsetTowardsShelf(const gfx::Rect& rect, views::Widget* widget) {
  57   DCHECK(Shell::HasInstance());
  58   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  59       widget->GetNativeView()->GetRootWindow());
  60   gfx::Rect offseted(rect);
  61   switch (shelf_alignment) {
  62     case SHELF_ALIGNMENT_BOTTOM:
  63       offseted.Offset(0, kAnimationOffset);
  64       break;
  65     case SHELF_ALIGNMENT_LEFT:
  66       offseted.Offset(-kAnimationOffset, 0);
  67       break;
  68     case SHELF_ALIGNMENT_RIGHT:
  69       offseted.Offset(kAnimationOffset, 0);
  70       break;
  71     default:
  72       NOTREACHED() << "Unknown shelf alignment " << shelf_alignment;
  73       break;
  74   }
  75
  76   return offseted;
  77 }
  78
  79 }  // namespace
  80
  81 ////////////////////////////////////////////////////////////////////////////////
  82 // AppListController, public:
  83
  84 AppListController::AppListController()
  85     : pagination_model_(new app_list::PaginationModel),
  86       is_visible_(false),
  87       view_(NULL),
  88       should_snap_back_(false) {
  89   Shell::GetInstance()->AddShellObserver(this);
  90   pagination_model_->AddObserver(this);
  91 }
  92
  93 AppListController::~AppListController() {
  94   // Ensures app list view goes before the controller since pagination model
  95   // lives in the controller and app list view would access it on destruction.
  96   if (view_ && view_->GetWidget())
  97     view_->GetWidget()->CloseNow();
  98
  99   Shell::GetInstance()->RemoveShellObserver(this);
 100   pagination_model_->RemoveObserver(this);
 101 }
 102
 103 void AppListController::SetVisible(bool visible, aura::Window* window) {
 104   if (visible == is_visible_)
 105     return;
 106
 107   is_visible_ = visible;
 108
 109   // App list needs to know the new shelf layout in order to calculate its
 110   // UI layout when AppListView visibility changes.
 111   Shell::GetPrimaryRootWindowController()->shelf()->UpdateAutoHideState();
 112
 113   if (view_) {
 114     ScheduleAnimation();
 115   } else if (is_visible_) {
 116     // AppListModel and AppListViewDelegate are owned by AppListView. They
 117     // will be released with AppListView on close.
 118     app_list::AppListView* view = new app_list::AppListView(
 119         Shell::GetInstance()->delegate()->CreateAppListViewDelegate());
 120     aura::Window* container = GetRootWindowController(window->GetRootWindow())->
 121         GetContainer(kShellWindowId_AppListContainer);
 122     view->InitAsBubble(
 123         container,
 124         pagination_model_.get(),
 125         Launcher::ForWindow(container)->GetAppListButtonView(),
 126         gfx::Point(),
 127         GetBubbleArrowLocation(container));
 128     SetView(view);
 129   }
 130 }
 131
 132 bool AppListController::IsVisible() const {
 133   return view_ && view_->GetWidget()->IsVisible();
 134 }
 135
 136 aura::Window* AppListController::GetWindow() {
 137   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 138 }
 139
 140 ////////////////////////////////////////////////////////////////////////////////
 141 // AppListController, private:
 142
 143 void AppListController::SetView(app_list::AppListView* view) {
 144   DCHECK(view_ == NULL);
 145   DCHECK(is_visible_);
 146
 147   view_ = view;
 148   views::Widget* widget = view_->GetWidget();
 149   widget->AddObserver(this);
 150   Shell::GetInstance()->AddPreTargetHandler(this);
 151   Launcher::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 152   widget->GetNativeView()->GetRootWindow()->AddRootWindowObserver(this);
 153   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 154
 155   view_->ShowWhenReady();
 156 }
 157
 158 void AppListController::ResetView() {
 159   if (!view_)
 160     return;
 161
 162   views::Widget* widget = view_->GetWidget();
 163   widget->RemoveObserver(this);
 164   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 165   Shell::GetInstance()->RemovePreTargetHandler(this);
 166   Launcher::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 167   widget->GetNativeView()->GetRootWindow()->RemoveRootWindowObserver(this);
 168   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 169   view_ = NULL;
 170 }
 171
 172 void AppListController::ScheduleAnimation() {
 173   // Stop observing previous animation.
 174   StopObservingImplicitAnimations();
 175
 176   views::Widget* widget = view_->GetWidget();
 177   ui::Layer* layer = GetLayer(widget);
 178   layer->GetAnimator()->StopAnimating();
 179
 180   gfx::Rect target_bounds;
 181   if (is_visible_) {
 182     target_bounds = widget->GetWindowBoundsInScreen();
 183     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 184   } else {
 185     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 186                                        widget);
 187   }
 188
 189   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 190   animation.SetTransitionDuration(
 191       base::TimeDelta::FromMilliseconds(
 192           is_visible_ ? 0 : kAnimationDurationMs));
 193   animation.AddObserver(this);
 194
 195   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 196   widget->SetBounds(target_bounds);
 197 }
 198
 199 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 200   // If the event happened on a menu, then the event should not close the app
 201   // list.
 202   aura::Window* target = static_cast<aura::Window*>(event->target());
 203   if (target) {
 204     RootWindowController* root_controller =
 205         GetRootWindowController(target->GetRootWindow());
 206     if (root_controller) {
 207       aura::Window* menu_container = root_controller->GetContainer(
 208           ash::internal::kShellWindowId_MenuContainer);
 209       if (menu_container->Contains(target))
 210         return;
 211     }
 212   }
 213
 214   if (view_ && is_visible_) {
 215     aura::Window* window = view_->GetWidget()->GetNativeView();
 216     gfx::Point window_local_point(event->root_location());
 217     aura::Window::ConvertPointToTarget(window->GetRootWindow(),
 218                                        window,
 219                                        &window_local_point);
 220     // Use HitTest to respect the hit test mask of the bubble.
 221     if (!window->HitTest(window_local_point))
 222       SetVisible(false, window);
 223   }
 224 }
 225
 226 void AppListController::UpdateBounds() {
 227   if (view_ && is_visible_)
 228     view_->UpdateBounds();
 229 }
 230
 231 ////////////////////////////////////////////////////////////////////////////////
 232 // AppListController, aura::EventFilter implementation:
 233
 234 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 235   if (event->type() == ui::ET_MOUSE_PRESSED)
 236     ProcessLocatedEvent(event);
 237 }
 238
 239 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 240   if (event->type() == ui::ET_GESTURE_TAP)
 241     ProcessLocatedEvent(event);
 242 }
 243
 244 ////////////////////////////////////////////////////////////////////////////////
 245 // AppListController,  aura::FocusObserver implementation:
 246
 247 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 248                                         aura::Window* lost_focus) {
 249   if (gained_focus && view_ && is_visible_) {
 250     aura::Window* applist_container =
 251         GetRootWindowController(gained_focus->GetRootWindow())->GetContainer(
 252             kShellWindowId_AppListContainer);
 253     if (gained_focus->parent() != applist_container)
 254       SetVisible(false, gained_focus);
 255   }
 256 }
 257
 258 ////////////////////////////////////////////////////////////////////////////////
 259 // AppListController,  aura::RootWindowObserver implementation:
 260 void AppListController::OnRootWindowResized(const aura::RootWindow* root,
 261                                             const gfx::Size& old_size) {
 262   UpdateBounds();
 263 }
 264
 265 ////////////////////////////////////////////////////////////////////////////////
 266 // AppListController, ui::ImplicitAnimationObserver implementation:
 267
 268 void AppListController::OnImplicitAnimationsCompleted() {
 269   if (is_visible_ )
 270     view_->GetWidget()->Activate();
 271   else
 272     view_->GetWidget()->Close();
 273 }
 274
 275 ////////////////////////////////////////////////////////////////////////////////
 276 // AppListController, views::WidgetObserver implementation:
 277
 278 void AppListController::OnWidgetClosing(views::Widget* widget) {
 279   DCHECK(view_->GetWidget() == widget);
 280   if (is_visible_)
 281     SetVisible(false, widget->GetNativeView());
 282   ResetView();
 283 }
 284
 285 ////////////////////////////////////////////////////////////////////////////////
 286 // AppListController, ShellObserver implementation:
 287 void AppListController::OnShelfAlignmentChanged(aura::RootWindow* root_window) {
 288   if (view_) {
 289     view_->SetBubbleArrowLocation(GetBubbleArrowLocation(
 290         view_->GetWidget()->GetNativeView()));
 291   }
 292 }
 293
 294 ////////////////////////////////////////////////////////////////////////////////
 295 // AppListController, LauncherIconObserver implementation:
 296
 297 void AppListController::OnLauncherIconPositionsChanged() {
 298   UpdateBounds();
 299 }
 300
 301 ////////////////////////////////////////////////////////////////////////////////
 302 // AppListController, PaginationModelObserver implementation:
 303
 304 void AppListController::TotalPagesChanged() {
 305 }
 306
 307 void AppListController::SelectedPageChanged(int old_selected,
 308                                             int new_selected) {
 309 }
 310
 311 void AppListController::TransitionChanged() {
 312   // |view_| could be NULL when app list is closed with a running transition.
 313   if (!view_)
 314     return;
 315
 316   const app_list::PaginationModel::Transition& transition =
 317       pagination_model_->transition();
 318   if (pagination_model_->is_valid_page(transition.target_page))
 319     return;
 320
 321   views::Widget* widget = view_->GetWidget();
 322   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 323   if (!pagination_model_->IsRevertingCurrentTransition()) {
 324     // Update cached |view_bounds_| if it is the first over-scroll move and
 325     // widget does not have running animations.
 326     if (!should_snap_back_ && !widget_animator->is_animating())
 327       view_bounds_ = widget->GetWindowBoundsInScreen();
 328
 329     const int current_page = pagination_model_->selected_page();
 330     const int dir = transition.target_page > current_page ? -1 : 1;
 331
 332     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 333     const int shift = kMaxOverScrollShift * progress * dir;
 334
 335     gfx::Rect shifted(view_bounds_);
 336     shifted.set_x(shifted.x() + shift);
 337     widget->SetBounds(shifted);
 338     should_snap_back_ = true;
 339   } else if (should_snap_back_) {
 340     should_snap_back_ = false;
 341     ui::ScopedLayerAnimationSettings animation(widget_animator);
 342     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 343         app_list::kOverscrollPageTransitionDurationMs));
 344     widget->SetBounds(view_bounds_);
 345   }
 346 }
 347
 348 }  // namespace internal
 349 }  // namespace ash