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/shelf/shelf_layout_manager.h"
  11 #include "ash/shell.h"
  12 #include "ash/shell_delegate.h"
  13 #include "ash/shell_window_ids.h"
  14 #include "ash/wm/property_util.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/base/events/event.h"
  23 #include "ui/compositor/layer.h"
  24 #include "ui/compositor/scoped_layer_animation_settings.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 alternate shelf style adjusts the bubble to be flush with the shelf
  43 // when there is no bubble-tip. This is the tip height which needs to be
  44 // offsetted.
  45 const int kArrowTipHeight = 10;
  46
  47 // The minimal anchor position offset to make sure that the bubble is still on
  48 // the screen with 8 pixels spacing on the left / right. This constant is a
  49 // result of minimal bubble arrow sizes and offsets.
  50 const int kMinimalAnchorPositionOffset = 57;
  51
  52 ui::Layer* GetLayer(views::Widget* widget) {
  53   return widget->GetNativeView()->layer();
  54 }
  55
  56 // Gets arrow location based on shelf alignment.
  57 views::BubbleBorder::Arrow GetBubbleArrow(aura::Window* window) {
  58   DCHECK(Shell::HasInstance());
  59   return ShelfLayoutManager::ForLauncher(window)->
  60       SelectValueForShelfAlignment(
  61           views::BubbleBorder::BOTTOM_CENTER,
  62           views::BubbleBorder::LEFT_CENTER,
  63           views::BubbleBorder::RIGHT_CENTER,
  64           views::BubbleBorder::TOP_CENTER);
  65 }
  66
  67 // Offset given |rect| towards shelf.
  68 gfx::Rect OffsetTowardsShelf(const gfx::Rect& rect, views::Widget* widget) {
  69   DCHECK(Shell::HasInstance());
  70   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  71       widget->GetNativeView()->GetRootWindow());
  72   gfx::Rect offseted(rect);
  73   switch (shelf_alignment) {
  74     case SHELF_ALIGNMENT_BOTTOM:
  75       offseted.Offset(0, kAnimationOffset);
  76       break;
  77     case SHELF_ALIGNMENT_LEFT:
  78       offseted.Offset(-kAnimationOffset, 0);
  79       break;
  80     case SHELF_ALIGNMENT_RIGHT:
  81       offseted.Offset(kAnimationOffset, 0);
  82       break;
  83     case SHELF_ALIGNMENT_TOP:
  84       offseted.Offset(0, -kAnimationOffset);
  85       break;
  86   }
  87
  88   return offseted;
  89 }
  90
  91 // Using |button_bounds|, determine the anchor so that the bubble gets shown
  92 // above the shelf (used for the alternate shelf theme).
  93 gfx::Point GetAdjustAnchorPositionToShelf(
  94     const gfx::Rect& button_bounds, views::Widget* widget) {
  95   DCHECK(Shell::HasInstance());
  96   ShelfAlignment shelf_alignment = Shell::GetInstance()->GetShelfAlignment(
  97       widget->GetNativeView()->GetRootWindow());
  98   gfx::Point anchor(button_bounds.CenterPoint());
  99   switch (shelf_alignment) {
 100     case SHELF_ALIGNMENT_TOP:
 101     case SHELF_ALIGNMENT_BOTTOM:
 102       {
 103         if (base::i18n::IsRTL()) {
 104           int screen_width = widget->GetWorkAreaBoundsInScreen().width();
 105           anchor.set_x(std::min(screen_width - kMinimalAnchorPositionOffset,
 106                                 anchor.x()));
 107         } else {
 108           anchor.set_x(std::max(kMinimalAnchorPositionOffset, anchor.x()));
 109         }
 110         int offset = button_bounds.height() / 2 - kArrowTipHeight;
 111         if (shelf_alignment == SHELF_ALIGNMENT_TOP)
 112           offset = -offset;
 113         anchor.set_y(anchor.y() - offset);
 114       }
 115       break;
 116     case SHELF_ALIGNMENT_LEFT:
 117       anchor.set_x(button_bounds.right() - kArrowTipHeight);
 118       anchor.set_y(std::max(kMinimalAnchorPositionOffset, anchor.y()));
 119       break;
 120     case SHELF_ALIGNMENT_RIGHT:
 121       anchor.set_x(button_bounds.x() + kArrowTipHeight);
 122       anchor.set_y(std::max(kMinimalAnchorPositionOffset, anchor.y()));
 123       break;
 124   }
 125
 126   return anchor;
 127 }
 128
 129 }  // namespace
 130
 131 ////////////////////////////////////////////////////////////////////////////////
 132 // AppListController, public:
 133
 134 AppListController::AppListController()
 135     : pagination_model_(new app_list::PaginationModel),
 136       is_visible_(false),
 137       view_(NULL),
 138       should_snap_back_(false) {
 139   Shell::GetInstance()->AddShellObserver(this);
 140   pagination_model_->AddObserver(this);
 141 }
 142
 143 AppListController::~AppListController() {
 144   // Ensures app list view goes before the controller since pagination model
 145   // lives in the controller and app list view would access it on destruction.
 146   if (view_ && view_->GetWidget())
 147     view_->GetWidget()->CloseNow();
 148
 149   Shell::GetInstance()->RemoveShellObserver(this);
 150   pagination_model_->RemoveObserver(this);
 151 }
 152
 153 void AppListController::SetVisible(bool visible, aura::Window* window) {
 154   if (visible == is_visible_)
 155     return;
 156
 157   is_visible_ = visible;
 158
 159   // App list needs to know the new shelf layout in order to calculate its
 160   // UI layout when AppListView visibility changes.
 161   Shell::GetPrimaryRootWindowController()->GetShelfLayoutManager()->
 162       UpdateAutoHideState();
 163
 164   if (view_) {
 165     ScheduleAnimation();
 166   } else if (is_visible_) {
 167     // AppListModel and AppListViewDelegate are owned by AppListView. They
 168     // will be released with AppListView on close.
 169     app_list::AppListView* view = new app_list::AppListView(
 170         Shell::GetInstance()->delegate()->CreateAppListViewDelegate());
 171     aura::Window* container = GetRootWindowController(window->GetRootWindow())->
 172         GetContainer(kShellWindowId_AppListContainer);
 173     if (ash::switches::UseAlternateShelfLayout()) {
 174       gfx::Rect applist_button_bounds = Launcher::ForWindow(container)->
 175           GetAppListButtonView()->GetBoundsInScreen();
 176       view->InitAsBubble(
 177           container,
 178           pagination_model_.get(),
 179           NULL,
 180           GetAdjustAnchorPositionToShelf(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->InitAsBubble(
 188           container,
 189           pagination_model_.get(),
 190           Launcher::ForWindow(container)->GetAppListButtonView(),
 191           gfx::Point(),
 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 }
 205
 206 bool AppListController::IsVisible() const {
 207   return view_ && view_->GetWidget()->IsVisible();
 208 }
 209
 210 aura::Window* AppListController::GetWindow() {
 211   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 212 }
 213
 214 ////////////////////////////////////////////////////////////////////////////////
 215 // AppListController, private:
 216
 217 void AppListController::SetDragAndDropHostOfCurrentAppList(
 218     app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
 219   if (view_ && is_visible_)
 220     view_->SetDragAndDropHostOfCurrentAppList(drag_and_drop_host);
 221 }
 222
 223 void AppListController::SetView(app_list::AppListView* view) {
 224   DCHECK(view_ == NULL);
 225   DCHECK(is_visible_);
 226
 227   view_ = view;
 228   views::Widget* widget = view_->GetWidget();
 229   widget->AddObserver(this);
 230   Shell::GetInstance()->AddPreTargetHandler(this);
 231   Launcher::ForWindow(widget->GetNativeWindow())->AddIconObserver(this);
 232   widget->GetNativeView()->GetRootWindow()->AddObserver(this);
 233   aura::client::GetFocusClient(widget->GetNativeView())->AddObserver(this);
 234
 235   view_->ShowWhenReady();
 236 }
 237
 238 void AppListController::ResetView() {
 239   if (!view_)
 240     return;
 241
 242   views::Widget* widget = view_->GetWidget();
 243   widget->RemoveObserver(this);
 244   GetLayer(widget)->GetAnimator()->RemoveObserver(this);
 245   Shell::GetInstance()->RemovePreTargetHandler(this);
 246   Launcher::ForWindow(widget->GetNativeWindow())->RemoveIconObserver(this);
 247   widget->GetNativeView()->GetRootWindow()->RemoveObserver(this);
 248   aura::client::GetFocusClient(widget->GetNativeView())->RemoveObserver(this);
 249   view_ = NULL;
 250 }
 251
 252 void AppListController::ScheduleAnimation() {
 253   // Stop observing previous animation.
 254   StopObservingImplicitAnimations();
 255
 256   views::Widget* widget = view_->GetWidget();
 257   ui::Layer* layer = GetLayer(widget);
 258   layer->GetAnimator()->StopAnimating();
 259
 260   gfx::Rect target_bounds;
 261   if (is_visible_) {
 262     target_bounds = widget->GetWindowBoundsInScreen();
 263     widget->SetBounds(OffsetTowardsShelf(target_bounds, widget));
 264   } else {
 265     target_bounds = OffsetTowardsShelf(widget->GetWindowBoundsInScreen(),
 266                                        widget);
 267   }
 268
 269   ui::ScopedLayerAnimationSettings animation(layer->GetAnimator());
 270   animation.SetTransitionDuration(
 271       base::TimeDelta::FromMilliseconds(
 272           is_visible_ ? 0 : kAnimationDurationMs));
 273   animation.AddObserver(this);
 274
 275   layer->SetOpacity(is_visible_ ? 1.0 : 0.0);
 276   widget->SetBounds(target_bounds);
 277 }
 278
 279 void AppListController::ProcessLocatedEvent(ui::LocatedEvent* event) {
 280   // If the event happened on a menu, then the event should not close the app
 281   // list.
 282   aura::Window* target = static_cast<aura::Window*>(event->target());
 283   if (target) {
 284     RootWindowController* root_controller =
 285         GetRootWindowController(target->GetRootWindow());
 286     if (root_controller) {
 287       aura::Window* menu_container = root_controller->GetContainer(
 288           ash::internal::kShellWindowId_MenuContainer);
 289       if (menu_container->Contains(target))
 290         return;
 291     }
 292   }
 293
 294   if (view_ && is_visible_) {
 295     aura::Window* window = view_->GetWidget()->GetNativeView();
 296     gfx::Point window_local_point(event->root_location());
 297     aura::Window::ConvertPointToTarget(window->GetRootWindow(),
 298                                        window,
 299                                        &window_local_point);
 300     // Use HitTest to respect the hit test mask of the bubble.
 301     if (!window->HitTest(window_local_point))
 302       SetVisible(false, window);
 303   }
 304 }
 305
 306 void AppListController::UpdateBounds() {
 307   if (view_ && is_visible_)
 308     view_->UpdateBounds();
 309 }
 310
 311 ////////////////////////////////////////////////////////////////////////////////
 312 // AppListController, aura::EventFilter implementation:
 313
 314 void AppListController::OnMouseEvent(ui::MouseEvent* event) {
 315   if (event->type() == ui::ET_MOUSE_PRESSED)
 316     ProcessLocatedEvent(event);
 317 }
 318
 319 void AppListController::OnGestureEvent(ui::GestureEvent* event) {
 320   if (event->type() == ui::ET_GESTURE_TAP_DOWN)
 321     ProcessLocatedEvent(event);
 322 }
 323
 324 ////////////////////////////////////////////////////////////////////////////////
 325 // AppListController,  aura::FocusObserver implementation:
 326
 327 void AppListController::OnWindowFocused(aura::Window* gained_focus,
 328                                         aura::Window* lost_focus) {
 329   if (gained_focus && view_ && is_visible_) {
 330     aura::Window* applist_container =
 331         GetRootWindowController(gained_focus->GetRootWindow())->GetContainer(
 332             kShellWindowId_AppListContainer);
 333     if (gained_focus->parent() != applist_container)
 334       SetVisible(false, gained_focus);
 335   }
 336 }
 337
 338 ////////////////////////////////////////////////////////////////////////////////
 339 // AppListController,  aura::WindowObserver implementation:
 340 void AppListController::OnWindowBoundsChanged(aura::Window* root,
 341                                               const gfx::Rect& old_bounds,
 342                                               const gfx::Rect& new_bounds) {
 343   UpdateBounds();
 344 }
 345
 346 ////////////////////////////////////////////////////////////////////////////////
 347 // AppListController, ui::ImplicitAnimationObserver implementation:
 348
 349 void AppListController::OnImplicitAnimationsCompleted() {
 350   if (is_visible_ )
 351     view_->GetWidget()->Activate();
 352   else
 353     view_->GetWidget()->Close();
 354 }
 355
 356 ////////////////////////////////////////////////////////////////////////////////
 357 // AppListController, views::WidgetObserver implementation:
 358
 359 void AppListController::OnWidgetDestroying(views::Widget* widget) {
 360   DCHECK(view_->GetWidget() == widget);
 361   if (is_visible_)
 362     SetVisible(false, widget->GetNativeView());
 363   ResetView();
 364 }
 365
 366 ////////////////////////////////////////////////////////////////////////////////
 367 // AppListController, ShellObserver implementation:
 368 void AppListController::OnShelfAlignmentChanged(aura::RootWindow* root_window) {
 369   if (view_)
 370     view_->SetBubbleArrow(GetBubbleArrow(view_->GetWidget()->GetNativeView()));
 371 }
 372
 373 ////////////////////////////////////////////////////////////////////////////////
 374 // AppListController, LauncherIconObserver implementation:
 375
 376 void AppListController::OnLauncherIconPositionsChanged() {
 377   UpdateBounds();
 378 }
 379
 380 ////////////////////////////////////////////////////////////////////////////////
 381 // AppListController, PaginationModelObserver implementation:
 382
 383 void AppListController::TotalPagesChanged() {
 384 }
 385
 386 void AppListController::SelectedPageChanged(int old_selected,
 387                                             int new_selected) {
 388 }
 389
 390 void AppListController::TransitionStarted() {
 391 }
 392
 393 void AppListController::TransitionChanged() {
 394   // |view_| could be NULL when app list is closed with a running transition.
 395   if (!view_)
 396     return;
 397
 398   const app_list::PaginationModel::Transition& transition =
 399       pagination_model_->transition();
 400   if (pagination_model_->is_valid_page(transition.target_page))
 401     return;
 402
 403   views::Widget* widget = view_->GetWidget();
 404   ui::LayerAnimator* widget_animator = GetLayer(widget)->GetAnimator();
 405   if (!pagination_model_->IsRevertingCurrentTransition()) {
 406     // Update cached |view_bounds_| if it is the first over-scroll move and
 407     // widget does not have running animations.
 408     if (!should_snap_back_ && !widget_animator->is_animating())
 409       view_bounds_ = widget->GetWindowBoundsInScreen();
 410
 411     const int current_page = pagination_model_->selected_page();
 412     const int dir = transition.target_page > current_page ? -1 : 1;
 413
 414     const double progress = 1.0 - pow(1.0 - transition.progress, 4);
 415     const int shift = kMaxOverScrollShift * progress * dir;
 416
 417     gfx::Rect shifted(view_bounds_);
 418     shifted.set_x(shifted.x() + shift);
 419     widget->SetBounds(shifted);
 420     should_snap_back_ = true;
 421   } else if (should_snap_back_) {
 422     should_snap_back_ = false;
 423     ui::ScopedLayerAnimationSettings animation(widget_animator);
 424     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
 425         app_list::kOverscrollPageTransitionDurationMs));
 426     widget->SetBounds(view_bounds_);
 427   }
 428 }
 429
 430 }  // namespace internal
 431 }  // namespace ash