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/shelf/shelf_layout_manager.h"
  10 #include "ash/shell.h"
  11 #include "ash/shell_delegate.h"
  12 #include "ash/shell_window_ids.h"
  13 #include "ash/wm/property_util.h"
  14 #include "ui/app_list/app_list_constants.h"
  15 #include "ui/app_list/pagination_model.h"
  16 #include "ui/app_list/views/app_list_view.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           views::BubbleBorder::TOP_CENTER);
  54 }
  55
  56 // Offset given |rect| towards shelf.
  57 gfx::Rect OffsetTowardsShelf(const gfx::Rect& rect, views::Widget* widget) {
  58   DCHECK(Shell::HasInstance());
  59   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  60       widget->GetNativeView()->GetRootWindow());
  61   gfx::Rect offseted(rect);
  62   switch (shelf_alignment) {
  63     case SHELF_ALIGNMENT_BOTTOM:
  64       offseted.Offset(0, kAnimationOffset);
  65       break;
  66     case SHELF_ALIGNMENT_LEFT:
  67       offseted.Offset(-kAnimationOffset, 0);
  68       break;
  69     case SHELF_ALIGNMENT_RIGHT:
  70       offseted.Offset(kAnimationOffset, 0);
  71       break;
  72     case SHELF_ALIGNMENT_TOP:
  73       offseted.Offset(0, -kAnimationOffset);
  74       break;
  75   }
  76
  77   return offseted;
  78 }
  79
  80 }  // namespace
  81
  82 ////////////////////////////////////////////////////////////////////////////////
  83 // AppListController, public:
  84
  85 AppListController::AppListController()
  86     : pagination_model_(new app_list::PaginationModel),
  87       is_visible_(false),
  88       view_(NULL),
  89       should_snap_back_(false) {
  90   Shell::GetInstance()->AddShellObserver(this);
  91   pagination_model_->AddObserver(this);
  92 }
  93
  94 AppListController::~AppListController() {
  95   // Ensures app list view goes before the controller since pagination model
  96   // lives in the controller and app list view would access it on destruction.
  97   if (view_ && view_->GetWidget())
  98     view_->GetWidget()->CloseNow();
  99
 100   Shell::GetInstance()->RemoveShellObserver(this);
 101   pagination_model_->RemoveObserver(this);
 102 }
 103
 104 void AppListController::SetVisible(bool visible, aura::Window* window) {
 105   if (visible == is_visible_)
 106     return;
 107
 108   is_visible_ = visible;
 109
 110   // App list needs to know the new shelf layout in order to calculate its
 111   // UI layout when AppListView visibility changes.
 112   Shell::GetPrimaryRootWindowController()->GetShelfLayoutManager()->
 113       UpdateAutoHideState();
 114
 115   if (view_) {
 116     ScheduleAnimation();
 117   } else if (is_visible_) {
 118     // AppListModel and AppListViewDelegate are owned by AppListView. They
 119     // will be released with AppListView on close.
 120     app_list::AppListView* view = new app_list::AppListView(
 121         Shell::GetInstance()->delegate()->CreateAppListViewDelegate());
 122     aura::Window* container = GetRootWindowController(window->GetRootWindow())->
 123         GetContainer(kShellWindowId_AppListContainer);
 124     view->InitAsBubble(
 125         container,
 126         pagination_model_.get(),
 127         Launcher::ForWindow(container)->GetAppListButtonView(),
 128         gfx::Point(),
 129         GetBubbleArrowLocation(container),
 130         true /* border_accepts_events */);
 131     SetView(view);
 132   }
 133 }
 134
 135 bool AppListController::IsVisible() const {
 136   return view_ && view_->GetWidget()->IsVisible();
 137 }
 138
 139 aura::Window* AppListController::GetWindow() {
 140   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 141 }
 142
 143 ////////////////////////////////////////////////////////////////////////////////
 144 // AppListController, private:
 145
 146 void AppListController::SetView(app_list::AppListView* view) {
 147   DCHECK(view_ == NULL);
 148   DCHECK(is_visible_);
 149
 150   view_ = view;
 151   views::Widget* widget = view_->GetWidget();
 152   widget->AddObserver(this);
 153   Shell::GetInstance()->AddPreTargetHandler(this);
 154   Launcher::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 155   widget->GetNativeView()->GetRootWindow()->AddRootWindowObserver(this);
 156   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 157
 158   view_->ShowWhenReady();
 159 }
 160
 161 void AppListController::ResetView() {
 162   if (!view_)
 163     return;
 164
 165   views::Widget* widget = view_->GetWidget();
 166   widget->RemoveObserver(this);
 167   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 168   Shell::GetInstance()->RemovePreTargetHandler(this);
 169   Launcher::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 170   widget->GetNativeView()->GetRootWindow()->RemoveRootWindowObserver(this);
 171   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 172   view_ = NULL;
 173 }
 174
 175 void AppListController::ScheduleAnimation() {
 176   // Stop observing previous animation.
 177   StopObservingImplicitAnimations();
 178
 179   views::Widget* widget = view_->GetWidget();
 180   ui::Layer* layer = GetLayer(widget);
 181   layer->GetAnimator()->StopAnimating();
 182
 183   gfx::Rect target_bounds;
 184   if (is_visible_) {
 185     target_bounds = widget->GetWindowBoundsInScreen();
 186     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 187   } else {
 188     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 189                                        widget);
 190   }
 191
 192   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 193   animation.SetTransitionDuration(
 194       base::TimeDelta::FromMilliseconds(
 195           is_visible_ ? 0 : kAnimationDurationMs));
 196   animation.AddObserver(this);
 197
 198   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 199   widget->SetBounds(target_bounds);
 200 }
 201
 202 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 203   // If the event happened on a menu, then the event should not close the app
 204   // list.
 205   aura::Window* target = static_cast<aura::Window*>(event->target());
 206   if (target) {
 207     RootWindowController* root_controller =
 208         GetRootWindowController(target->GetRootWindow());
 209     if (root_controller) {
 210       aura::Window* menu_container = root_controller->GetContainer(
 211           ash::internal::kShellWindowId_MenuContainer);
 212       if (menu_container->Contains(target))
 213         return;
 214     }
 215   }
 216
 217   if (view_ && is_visible_) {
 218     aura::Window* window = view_->GetWidget()->GetNativeView();
 219     gfx::Point window_local_point(event->root_location());
 220     aura::Window::ConvertPointToTarget(window->GetRootWindow(),
 221                                        window,
 222                                        &window_local_point);
 223     // Use HitTest to respect the hit test mask of the bubble.
 224     if (!window->HitTest(window_local_point))
 225       SetVisible(false, window);
 226   }
 227 }
 228
 229 void AppListController::UpdateBounds() {
 230   if (view_ && is_visible_)
 231     view_->UpdateBounds();
 232 }
 233
 234 ////////////////////////////////////////////////////////////////////////////////
 235 // AppListController, aura::EventFilter implementation:
 236
 237 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 238   if (event->type() == ui::ET_MOUSE_PRESSED)
 239     ProcessLocatedEvent(event);
 240 }
 241
 242 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 243   if (event->type() == ui::ET_GESTURE_TAP_DOWN)
 244     ProcessLocatedEvent(event);
 245 }
 246
 247 ////////////////////////////////////////////////////////////////////////////////
 248 // AppListController,  aura::FocusObserver implementation:
 249
 250 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 251                                         aura::Window* lost_focus) {
 252   if (gained_focus && view_ && is_visible_) {
 253     aura::Window* applist_container =
 254         GetRootWindowController(gained_focus->GetRootWindow())->GetContainer(
 255             kShellWindowId_AppListContainer);
 256     if (gained_focus->parent() != applist_container)
 257       SetVisible(false, gained_focus);
 258   }
 259 }
 260
 261 ////////////////////////////////////////////////////////////////////////////////
 262 // AppListController,  aura::RootWindowObserver implementation:
 263 void AppListController::OnRootWindowResized(const aura::RootWindow* root,
 264                                             const gfx::Size& old_size) {
 265   UpdateBounds();
 266 }
 267
 268 ////////////////////////////////////////////////////////////////////////////////
 269 // AppListController, ui::ImplicitAnimationObserver implementation:
 270
 271 void AppListController::OnImplicitAnimationsCompleted() {
 272   if (is_visible_ )
 273     view_->GetWidget()->Activate();
 274   else
 275     view_->GetWidget()->Close();
 276 }
 277
 278 ////////////////////////////////////////////////////////////////////////////////
 279 // AppListController, views::WidgetObserver implementation:
 280
 281 void AppListController::OnWidgetDestroying(views::Widget* widget) {
 282   DCHECK(view_->GetWidget() == widget);
 283   if (is_visible_)
 284     SetVisible(false, widget->GetNativeView());
 285   ResetView();
 286 }
 287
 288 ////////////////////////////////////////////////////////////////////////////////
 289 // AppListController, ShellObserver implementation:
 290 void AppListController::OnShelfAlignmentChanged(aura::RootWindow* root_window) {
 291   if (view_) {
 292     view_->SetBubbleArrowLocation(GetBubbleArrowLocation(
 293         view_->GetWidget()->GetNativeView()));
 294   }
 295 }
 296
 297 ////////////////////////////////////////////////////////////////////////////////
 298 // AppListController, LauncherIconObserver implementation:
 299
 300 void AppListController::OnLauncherIconPositionsChanged() {
 301   UpdateBounds();
 302 }
 303
 304 ////////////////////////////////////////////////////////////////////////////////
 305 // AppListController, PaginationModelObserver implementation:
 306
 307 void AppListController::TotalPagesChanged() {
 308 }
 309
 310 void AppListController::SelectedPageChanged(int old_selected,
 311                                             int new_selected) {
 312 }
 313
 314 void AppListController::TransitionChanged() {
 315   // |view_| could be NULL when app list is closed with a running transition.
 316   if (!view_)
 317     return;
 318
 319   const app_list::PaginationModel::Transition& transition =
 320       pagination_model_->transition();
 321   if (pagination_model_->is_valid_page(transition.target_page))
 322     return;
 323
 324   views::Widget* widget = view_->GetWidget();
 325   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 326   if (!pagination_model_->IsRevertingCurrentTransition()) {
 327     // Update cached |view_bounds_| if it is the first over-scroll move and
 328     // widget does not have running animations.
 329     if (!should_snap_back_ && !widget_animator->is_animating())
 330       view_bounds_ = widget->GetWindowBoundsInScreen();
 331
 332     const int current_page = pagination_model_->selected_page();
 333     const int dir = transition.target_page > current_page ? -1 : 1;
 334
 335     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 336     const int shift = kMaxOverScrollShift * progress * dir;
 337
 338     gfx::Rect shifted(view_bounds_);
 339     shifted.set_x(shifted.x() + shift);
 340     widget->SetBounds(shifted);
 341     should_snap_back_ = true;
 342   } else if (should_snap_back_) {
 343     should_snap_back_ = false;
 344     ui::ScopedLayerAnimationSettings animation(widget_animator);
 345     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 346         app_list::kOverscrollPageTransitionDurationMs));
 347     widget->SetBounds(view_bounds_);
 348   }
 349 }
 350
 351 }  // namespace internal
 352 }  // namespace ash