src/ash/system/tray/system_tray_bubble.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/system/tray/system_tray_bubble.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/system/tray/system_tray.h"
   9 #include "ash/system/tray/system_tray_delegate.h"
  10 #include "ash/system/tray/system_tray_item.h"
  11 #include "ash/system/tray/tray_bubble_wrapper.h"
  12 #include "ash/system/tray/tray_constants.h"
  13 #include "ash/system/tray/tray_popup_item_container.h"
  14 #include "base/message_loop/message_loop.h"
  15 #include "ui/aura/window.h"
  16 #include "ui/compositor/layer.h"
  17 #include "ui/compositor/layer_animation_observer.h"
  18 #include "ui/compositor/scoped_layer_animation_settings.h"
  19 #include "ui/gfx/canvas.h"
  20 #include "ui/views/layout/box_layout.h"
  21 #include "ui/views/view.h"
  22 #include "ui/views/widget/widget.h"
  23
  24 using views::TrayBubbleView;
  25
  26 namespace ash {
  27
  28 namespace {
  29
  30 // Normally a detailed view is the same size as the default view. However,
  31 // when showing a detailed view directly (e.g. clicking on a notification),
  32 // we may not know the height of the default view, or the default view may
  33 // be too short, so we use this as a default and minimum height for any
  34 // detailed view.
  35 const int kDetailedBubbleMaxHeight = kTrayPopupItemHeight * 5;
  36
  37 // Duration of swipe animation used when transitioning from a default to
  38 // detailed view or vice versa.
  39 const int kSwipeDelayMS = 150;
  40
  41 // Implicit animation observer that deletes itself and the layer at the end of
  42 // the animation.
  43 class AnimationObserverDeleteLayer : public ui::ImplicitAnimationObserver {
  44  public:
  45   explicit AnimationObserverDeleteLayer(ui::Layer* layer)
  46       : layer_(layer) {
  47   }
  48
  49   ~AnimationObserverDeleteLayer() override {}
  50
  51   void OnImplicitAnimationsCompleted() override {
  52     base::MessageLoopForUI::current()->DeleteSoon(FROM_HERE, this);
  53   }
  54
  55  private:
  56   scoped_ptr<ui::Layer> layer_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(AnimationObserverDeleteLayer);
  59 };
  60
  61 }  // namespace
  62
  63 // SystemTrayBubble
  64
  65 SystemTrayBubble::SystemTrayBubble(
  66     ash::SystemTray* tray,
  67     const std::vector<ash::SystemTrayItem*>& items,
  68     BubbleType bubble_type)
  69     : tray_(tray),
  70       bubble_view_(NULL),
  71       items_(items),
  72       bubble_type_(bubble_type),
  73       autoclose_delay_(0) {
  74 }
  75
  76 SystemTrayBubble::~SystemTrayBubble() {
  77   DestroyItemViews();
  78   // Reset the host pointer in bubble_view_ in case its destruction is deferred.
  79   if (bubble_view_)
  80     bubble_view_->reset_delegate();
  81 }
  82
  83 void SystemTrayBubble::UpdateView(
  84     const std::vector<ash::SystemTrayItem*>& items,
  85     BubbleType bubble_type) {
  86   DCHECK(bubble_type != BUBBLE_TYPE_NOTIFICATION);
  87
  88   scoped_ptr<ui::Layer> scoped_layer;
  89   if (bubble_type != bubble_type_) {
  90     base::TimeDelta swipe_duration =
  91         base::TimeDelta::FromMilliseconds(kSwipeDelayMS);
  92     scoped_layer = bubble_view_->RecreateLayer();
  93     // Keep the reference to layer as we need it after releasing it.
  94     ui::Layer* layer = scoped_layer.get();
  95     DCHECK(layer);
  96     layer->SuppressPaint();
  97
  98     // When transitioning from detailed view to default view, animate the
  99     // existing view (slide out towards the right).
 100     if (bubble_type == BUBBLE_TYPE_DEFAULT) {
 101       ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());
 102       settings.AddObserver(
 103           new AnimationObserverDeleteLayer(scoped_layer.release()));
 104       settings.SetTransitionDuration(swipe_duration);
 105       settings.SetTweenType(gfx::Tween::EASE_OUT);
 106       gfx::Transform transform;
 107       transform.Translate(layer->bounds().width(), 0.0);
 108       layer->SetTransform(transform);
 109     }
 110
 111     {
 112       // Add a shadow layer to make the old layer darker as the animation
 113       // progresses.
 114       ui::Layer* shadow = new ui::Layer(ui::LAYER_SOLID_COLOR);
 115       shadow->SetColor(SK_ColorBLACK);
 116       shadow->SetOpacity(0.01f);
 117       shadow->SetBounds(layer->bounds());
 118       layer->Add(shadow);
 119       layer->StackAtTop(shadow);
 120       {
 121         // Animate the darkening effect a little longer than the swipe-in. This
 122         // is to make sure the darkening animation does not end up finishing
 123         // early, because the dark layer goes away at the end of the animation,
 124         // and there is a brief moment when the old view is still visible, but
 125         // it does not have the shadow layer on top.
 126         ui::ScopedLayerAnimationSettings settings(shadow->GetAnimator());
 127         settings.AddObserver(new AnimationObserverDeleteLayer(shadow));
 128         settings.SetTransitionDuration(swipe_duration +
 129                                        base::TimeDelta::FromMilliseconds(150));
 130         settings.SetTweenType(gfx::Tween::LINEAR);
 131         shadow->SetOpacity(0.15f);
 132       }
 133     }
 134   }
 135
 136   DestroyItemViews();
 137   bubble_view_->RemoveAllChildViews(true);
 138
 139   items_ = items;
 140   bubble_type_ = bubble_type;
 141   CreateItemViews(
 142       Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus());
 143
 144   // Close bubble view if we failed to create the item view.
 145   if (!bubble_view_->has_children()) {
 146     Close();
 147     return;
 148   }
 149
 150   bubble_view_->GetWidget()->GetContentsView()->Layout();
 151   // Make sure that the bubble is large enough for the default view.
 152   if (bubble_type_ == BUBBLE_TYPE_DEFAULT) {
 153     bubble_view_->SetMaxHeight(0);  // Clear max height limit.
 154   }
 155
 156   if (scoped_layer) {
 157     // When transitioning from default view to detailed view, animate the new
 158     // view (slide in from the right).
 159     if (bubble_type == BUBBLE_TYPE_DETAILED) {
 160       ui::Layer* new_layer = bubble_view_->layer();
 161
 162       // Make sure the new layer is stacked above the old layer during the
 163       // animation.
 164       new_layer->parent()->StackAbove(new_layer, scoped_layer.get());
 165
 166       gfx::Rect bounds = new_layer->bounds();
 167       gfx::Transform transform;
 168       transform.Translate(bounds.width(), 0.0);
 169       new_layer->SetTransform(transform);
 170       {
 171         ui::ScopedLayerAnimationSettings settings(new_layer->GetAnimator());
 172         settings.AddObserver(
 173             new AnimationObserverDeleteLayer(scoped_layer.release()));
 174         settings.SetTransitionDuration(
 175             base::TimeDelta::FromMilliseconds(kSwipeDelayMS));
 176         settings.SetTweenType(gfx::Tween::EASE_OUT);
 177         new_layer->SetTransform(gfx::Transform());
 178       }
 179     }
 180   }
 181 }
 182
 183 void SystemTrayBubble::InitView(views::View* anchor,
 184                                 user::LoginStatus login_status,
 185                                 TrayBubbleView::InitParams* init_params) {
 186   DCHECK(bubble_view_ == NULL);
 187
 188   if (bubble_type_ == BUBBLE_TYPE_DETAILED &&
 189       init_params->max_height < kDetailedBubbleMaxHeight) {
 190     init_params->max_height = kDetailedBubbleMaxHeight;
 191   } else if (bubble_type_ == BUBBLE_TYPE_NOTIFICATION) {
 192     init_params->close_on_deactivate = false;
 193   }
 194   bubble_view_ = TrayBubbleView::Create(
 195       tray_->GetBubbleWindowContainer(), anchor, tray_, init_params);
 196   bubble_view_->set_adjust_if_offscreen(false);
 197   CreateItemViews(login_status);
 198
 199   if (bubble_view_->CanActivate()) {
 200     bubble_view_->NotifyAccessibilityEvent(
 201         ui::AX_EVENT_ALERT, true);
 202   }
 203 }
 204
 205 void SystemTrayBubble::FocusDefaultIfNeeded() {
 206   views::FocusManager* manager = bubble_view_->GetFocusManager();
 207   if (!manager || manager->GetFocusedView())
 208     return;
 209
 210   views::View* view = manager->GetNextFocusableView(NULL, NULL, false, false);
 211   if (view)
 212     view->RequestFocus();
 213 }
 214
 215 void SystemTrayBubble::DestroyItemViews() {
 216   for (std::vector<ash::SystemTrayItem*>::iterator it = items_.begin();
 217        it != items_.end();
 218        ++it) {
 219     switch (bubble_type_) {
 220       case BUBBLE_TYPE_DEFAULT:
 221         (*it)->DestroyDefaultView();
 222         break;
 223       case BUBBLE_TYPE_DETAILED:
 224         (*it)->DestroyDetailedView();
 225         break;
 226       case BUBBLE_TYPE_NOTIFICATION:
 227         (*it)->DestroyNotificationView();
 228         break;
 229     }
 230   }
 231 }
 232
 233 void SystemTrayBubble::BubbleViewDestroyed() {
 234   bubble_view_ = NULL;
 235 }
 236
 237 void SystemTrayBubble::StartAutoCloseTimer(int seconds) {
 238   autoclose_.Stop();
 239   autoclose_delay_ = seconds;
 240   if (autoclose_delay_) {
 241     autoclose_.Start(FROM_HERE,
 242                      base::TimeDelta::FromSeconds(autoclose_delay_),
 243                      this, &SystemTrayBubble::Close);
 244   }
 245 }
 246
 247 void SystemTrayBubble::StopAutoCloseTimer() {
 248   autoclose_.Stop();
 249 }
 250
 251 void SystemTrayBubble::RestartAutoCloseTimer() {
 252   if (autoclose_delay_)
 253     StartAutoCloseTimer(autoclose_delay_);
 254 }
 255
 256 void SystemTrayBubble::Close() {
 257   tray_->HideBubbleWithView(bubble_view());
 258 }
 259
 260 void SystemTrayBubble::SetVisible(bool is_visible) {
 261   if (!bubble_view_)
 262     return;
 263   views::Widget* bubble_widget = bubble_view_->GetWidget();
 264   if (is_visible)
 265     bubble_widget->Show();
 266   else
 267     bubble_widget->Hide();
 268 }
 269
 270 bool SystemTrayBubble::IsVisible() {
 271   return bubble_view() && bubble_view()->GetWidget()->IsVisible();
 272 }
 273
 274 bool SystemTrayBubble::ShouldShowShelf() const {
 275   for (std::vector<ash::SystemTrayItem*>::const_iterator it = items_.begin();
 276        it != items_.end();
 277        ++it) {
 278     if ((*it)->ShouldShowShelf())
 279       return true;
 280   }
 281   return false;
 282 }
 283
 284 void SystemTrayBubble::CreateItemViews(user::LoginStatus login_status) {
 285   std::vector<views::View*> item_views;
 286   // If a system modal dialog is present, create the same tray as
 287   // in locked state.
 288   if (Shell::GetInstance()->IsSystemModalWindowOpen() &&
 289       login_status != user::LOGGED_IN_NONE) {
 290     login_status = user::LOGGED_IN_LOCKED;
 291   }
 292
 293   views::View* focus_view = NULL;
 294   for (size_t i = 0; i < items_.size(); ++i) {
 295     views::View* view = NULL;
 296     switch (bubble_type_) {
 297       case BUBBLE_TYPE_DEFAULT:
 298         view = items_[i]->CreateDefaultView(login_status);
 299         if (items_[i]->restore_focus())
 300           focus_view = view;
 301         break;
 302       case BUBBLE_TYPE_DETAILED:
 303         view = items_[i]->CreateDetailedView(login_status);
 304         break;
 305       case BUBBLE_TYPE_NOTIFICATION:
 306         view = items_[i]->CreateNotificationView(login_status);
 307         break;
 308     }
 309     if (view)
 310       item_views.push_back(view);
 311   }
 312
 313   bool is_default_bubble = bubble_type_ == BUBBLE_TYPE_DEFAULT;
 314   for (size_t i = 0; i < item_views.size(); ++i) {
 315     // For default view, draw bottom border for each item, except the last
 316     // 2 items, which are the bottom header row and the one just above it.
 317     bubble_view_->AddChildView(new TrayPopupItemContainer(
 318         item_views[i], is_default_bubble,
 319         is_default_bubble && (i < item_views.size() - 2)));
 320   }
 321   if (focus_view)
 322     focus_view->RequestFocus();
 323 }
 324
 325 }  // namespace ash