Revert of mash: Convert TrayBackgroundView to wm common types

ash/system/tray/system_tray_bubble.cc

Index: ash/system/tray/system_tray_bubble.cc
diff --git a/ash/system/tray/system_tray_bubble.cc b/ash/system/tray/system_tray_bubble.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9d5cc95158d796fa32ba3b310381ccf6fd563de2
--- /dev/null
+++ b/ash/system/tray/system_tray_bubble.cc
@@ -0,0 +1,326 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ash/system/tray/system_tray_bubble.h"
+
+#include "ash/common/system/tray/system_tray_delegate.h"
+#include "ash/common/system/tray/system_tray_item.h"
+#include "ash/common/system/tray/tray_constants.h"
+#include "ash/common/system/tray/tray_popup_item_container.h"
+#include "ash/common/wm_shell.h"
+#include "ash/shell.h"
+#include "ash/system/tray/system_tray.h"
+#include "ash/system/tray/tray_bubble_wrapper.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "ui/compositor/layer.h"
+#include "ui/compositor/layer_animation_observer.h"
+#include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+using views::TrayBubbleView;
+
+namespace ash {
+
+namespace {
+
+// Normally a detailed view is the same size as the default view. However,
+// when showing a detailed view directly (e.g. clicking on a notification),
+// we may not know the height of the default view, or the default view may
+// be too short, so we use this as a default and minimum height for any
+// detailed view.
+const int kDetailedBubbleMaxHeight = kTrayPopupItemHeight * 5;
+
+// Duration of swipe animation used when transitioning from a default to
+// detailed view or vice versa.
+const int kSwipeDelayMS = 150;
+
+// Implicit animation observer that deletes itself and the layer at the end of
+// the animation.
+class AnimationObserverDeleteLayer : public ui::ImplicitAnimationObserver {
+ public:
+  explicit AnimationObserverDeleteLayer(ui::Layer* layer)
+      : layer_(layer) {
+  }
+
+  ~AnimationObserverDeleteLayer() override {}
+
+  void OnImplicitAnimationsCompleted() override {
+    base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
+  }
+
+ private:
+  std::unique_ptr<ui::Layer> layer_;
+
+  DISALLOW_COPY_AND_ASSIGN(AnimationObserverDeleteLayer);
+};
+
+}  // namespace
+
+// SystemTrayBubble
+
+SystemTrayBubble::SystemTrayBubble(
+    ash::SystemTray* tray,
+    const std::vector<ash::SystemTrayItem*>& items,
+    BubbleType bubble_type)
+    : tray_(tray),
+      bubble_view_(NULL),
+      items_(items),
+      bubble_type_(bubble_type),
+      autoclose_delay_(0) {
+}
+
+SystemTrayBubble::~SystemTrayBubble() {
+  DestroyItemViews();
+  // Reset the host pointer in bubble_view_ in case its destruction is deferred.
+  if (bubble_view_)
+    bubble_view_->reset_delegate();
+}
+
+void SystemTrayBubble::UpdateView(
+    const std::vector<ash::SystemTrayItem*>& items,
+    BubbleType bubble_type) {
+  DCHECK(bubble_type != BUBBLE_TYPE_NOTIFICATION);
+
+  std::unique_ptr<ui::Layer> scoped_layer;
+  if (bubble_type != bubble_type_) {
+    base::TimeDelta swipe_duration =
+        base::TimeDelta::FromMilliseconds(kSwipeDelayMS);
+    scoped_layer = bubble_view_->RecreateLayer();
+    // Keep the reference to layer as we need it after releasing it.
+    ui::Layer* layer = scoped_layer.get();
+    DCHECK(layer);
+    layer->SuppressPaint();
+
+    // When transitioning from detailed view to default view, animate the
+    // existing view (slide out towards the right).
+    if (bubble_type == BUBBLE_TYPE_DEFAULT) {
+      ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());
+      settings.AddObserver(
+          new AnimationObserverDeleteLayer(scoped_layer.release()));
+      settings.SetTransitionDuration(swipe_duration);
+      settings.SetTweenType(gfx::Tween::EASE_OUT);
+      gfx::Transform transform;
+      transform.Translate(layer->bounds().width(), 0.0);
+      layer->SetTransform(transform);
+    }
+
+    {
+      // Add a shadow layer to make the old layer darker as the animation
+      // progresses.
+      ui::Layer* shadow = new ui::Layer(ui::LAYER_SOLID_COLOR);
+      shadow->SetColor(SK_ColorBLACK);
+      shadow->SetOpacity(0.01f);
+      shadow->SetBounds(layer->bounds());
+      layer->Add(shadow);
+      layer->StackAtTop(shadow);
+      {
+        // Animate the darkening effect a little longer than the swipe-in. This
+        // is to make sure the darkening animation does not end up finishing
+        // early, because the dark layer goes away at the end of the animation,
+        // and there is a brief moment when the old view is still visible, but
+        // it does not have the shadow layer on top.
+        ui::ScopedLayerAnimationSettings settings(shadow->GetAnimator());
+        settings.AddObserver(new AnimationObserverDeleteLayer(shadow));
+        settings.SetTransitionDuration(swipe_duration +
+                                       base::TimeDelta::FromMilliseconds(150));
+        settings.SetTweenType(gfx::Tween::LINEAR);
+        shadow->SetOpacity(0.15f);
+      }
+    }
+  }
+
+  DestroyItemViews();
+  bubble_view_->RemoveAllChildViews(true);
+
+  items_ = items;
+  bubble_type_ = bubble_type;
+  CreateItemViews(WmShell::Get()->system_tray_delegate()->GetUserLoginStatus());
+
+  // Close bubble view if we failed to create the item view.
+  if (!bubble_view_->has_children()) {
+    Close();
+    return;
+  }
+
+  bubble_view_->GetWidget()->GetContentsView()->Layout();
+  // Make sure that the bubble is large enough for the default view.
+  if (bubble_type_ == BUBBLE_TYPE_DEFAULT) {
+    bubble_view_->SetMaxHeight(0);  // Clear max height limit.
+  }
+
+  if (scoped_layer) {
+    // When transitioning from default view to detailed view, animate the new
+    // view (slide in from the right).
+    if (bubble_type == BUBBLE_TYPE_DETAILED) {
+      ui::Layer* new_layer = bubble_view_->layer();
+
+      // Make sure the new layer is stacked above the old layer during the
+      // animation.
+      new_layer->parent()->StackAbove(new_layer, scoped_layer.get());
+
+      gfx::Rect bounds = new_layer->bounds();
+      gfx::Transform transform;
+      transform.Translate(bounds.width(), 0.0);
+      new_layer->SetTransform(transform);
+      {
+        ui::ScopedLayerAnimationSettings settings(new_layer->GetAnimator());
+        settings.AddObserver(
+            new AnimationObserverDeleteLayer(scoped_layer.release()));
+        settings.SetTransitionDuration(
+            base::TimeDelta::FromMilliseconds(kSwipeDelayMS));
+        settings.SetTweenType(gfx::Tween::EASE_OUT);
+        new_layer->SetTransform(gfx::Transform());
+      }
+    }
+  }
+}
+
+void SystemTrayBubble::InitView(views::View* anchor,
+                                LoginStatus login_status,
+                                TrayBubbleView::InitParams* init_params) {
+  DCHECK(anchor);
+  DCHECK(!bubble_view_);
+
+  if (bubble_type_ == BUBBLE_TYPE_DETAILED &&
+      init_params->max_height < kDetailedBubbleMaxHeight) {
+    init_params->max_height = kDetailedBubbleMaxHeight;
+  } else if (bubble_type_ == BUBBLE_TYPE_NOTIFICATION) {
+    init_params->close_on_deactivate = false;
+  }
+  // The TrayBubbleView will use |anchor| and |tray_| to determine the parent
+  // container for the bubble.
+  bubble_view_ = TrayBubbleView::Create(anchor, tray_, init_params);
+  bubble_view_->set_adjust_if_offscreen(false);
+  CreateItemViews(login_status);
+
+  if (bubble_view_->CanActivate()) {
+    bubble_view_->NotifyAccessibilityEvent(
+        ui::AX_EVENT_ALERT, true);
+  }
+}
+
+void SystemTrayBubble::FocusDefaultIfNeeded() {
+  views::FocusManager* manager = bubble_view_->GetFocusManager();
+  if (!manager || manager->GetFocusedView())
+    return;
+
+  views::View* view = manager->GetNextFocusableView(NULL, NULL, false, false);
+  if (view)
+    view->RequestFocus();
+}
+
+void SystemTrayBubble::DestroyItemViews() {
+  for (std::vector<ash::SystemTrayItem*>::iterator it = items_.begin();
+       it != items_.end();
+       ++it) {
+    switch (bubble_type_) {
+      case BUBBLE_TYPE_DEFAULT:
+        (*it)->DestroyDefaultView();
+        break;
+      case BUBBLE_TYPE_DETAILED:
+        (*it)->DestroyDetailedView();
+        break;
+      case BUBBLE_TYPE_NOTIFICATION:
+        (*it)->DestroyNotificationView();
+        break;
+    }
+  }
+}
+
+void SystemTrayBubble::BubbleViewDestroyed() {
+  bubble_view_ = NULL;
+}
+
+void SystemTrayBubble::StartAutoCloseTimer(int seconds) {
+  autoclose_.Stop();
+  autoclose_delay_ = seconds;
+  if (autoclose_delay_) {
+    autoclose_.Start(FROM_HERE,
+                     base::TimeDelta::FromSeconds(autoclose_delay_),
+                     this, &SystemTrayBubble::Close);
+  }
+}
+
+void SystemTrayBubble::StopAutoCloseTimer() {
+  autoclose_.Stop();
+}
+
+void SystemTrayBubble::RestartAutoCloseTimer() {
+  if (autoclose_delay_)
+    StartAutoCloseTimer(autoclose_delay_);
+}
+
+void SystemTrayBubble::Close() {
+  tray_->HideBubbleWithView(bubble_view());
+}
+
+void SystemTrayBubble::SetVisible(bool is_visible) {
+  if (!bubble_view_)
+    return;
+  views::Widget* bubble_widget = bubble_view_->GetWidget();
+  if (is_visible)
+    bubble_widget->Show();
+  else
+    bubble_widget->Hide();
+}
+
+bool SystemTrayBubble::IsVisible() {
+  return bubble_view() && bubble_view()->GetWidget()->IsVisible();
+}
+
+bool SystemTrayBubble::ShouldShowShelf() const {
+  for (std::vector<ash::SystemTrayItem*>::const_iterator it = items_.begin();
+       it != items_.end();
+       ++it) {
+    if ((*it)->ShouldShowShelf())
+      return true;
+  }
+  return false;
+}
+
+void SystemTrayBubble::CreateItemViews(LoginStatus login_status) {
+  std::vector<views::View*> item_views;
+  // If a system modal dialog is present, create the same tray as
+  // in locked state.
+  if (WmShell::Get()->IsSystemModalWindowOpen() &&
+      login_status != LoginStatus::NOT_LOGGED_IN) {
+    login_status = LoginStatus::LOCKED;
+  }
+
+  views::View* focus_view = NULL;
+  for (size_t i = 0; i < items_.size(); ++i) {
+    views::View* view = NULL;
+    switch (bubble_type_) {
+      case BUBBLE_TYPE_DEFAULT:
+        view = items_[i]->CreateDefaultView(login_status);
+        if (items_[i]->restore_focus())
+          focus_view = view;
+        break;
+      case BUBBLE_TYPE_DETAILED:
+        view = items_[i]->CreateDetailedView(login_status);
+        break;
+      case BUBBLE_TYPE_NOTIFICATION:
+        view = items_[i]->CreateNotificationView(login_status);
+        break;
+    }
+    if (view)
+      item_views.push_back(view);
+  }
+
+  bool is_default_bubble = bubble_type_ == BUBBLE_TYPE_DEFAULT;
+  for (size_t i = 0; i < item_views.size(); ++i) {
+    // For default view, draw bottom border for each item, except the last
+    // 2 items, which are the bottom header row and the one just above it.
+    bubble_view_->AddChildView(new TrayPopupItemContainer(
+        item_views[i], is_default_bubble,
+        is_default_bubble && (i < item_views.size() - 2)));
+  }
+  if (focus_view)
+    focus_view->RequestFocus();
+}
+
+}  // namespace ash