ash: Show a nagging reminder for available updates.

ash/system/tray_update.cc

Index: ash/system/tray_update.cc
diff --git a/ash/system/tray_update.cc b/ash/system/tray_update.cc
index 0c0ee041b33bf4c9a6f077234435b9315081716f..6b979159284b8cb7dfff950612ca700190580422 100644
--- a/ash/system/tray_update.cc
+++ b/ash/system/tray_update.cc
@@ -5,12 +5,20 @@
 #include "ash/system/tray_update.h"
 
 #include "ash/shell.h"
+#include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_views.h"
+#include "ash/wm/shelf_layout_manager.h"
+#include "base/time.h"
+#include "base/timer.h"
 #include "grit/ash_strings.h"
 #include "grit/ui_resources.h"
+#include "ui/aura/window.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/compositor/layer.h"
+#include "ui/gfx/compositor/layer_animation_sequence.h"
+#include "ui/gfx/compositor/layer_animation_observer.h"
 #include "ui/gfx/image/image.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
@@ -19,6 +27,12 @@
 
 namespace {
 
+// How many seconds should we wait before showing the nag reminder?
+const int kUpdateNaggingTimeSeconds = 24 * 60 * 60;
+
+// How long should the nag reminder be displayed?
+const int kShowUpdateNaggerForSeconds = 15;
+
 class UpdateView : public ash::internal::ActionableView {
  public:
   UpdateView() {
@@ -56,6 +70,58 @@ class UpdateView : public ash::internal::ActionableView {
 namespace ash {
 namespace internal {
 
+namespace tray {
+
+class UpdateNagger : public ui::LayerAnimationObserver {
+ public:
+  explicit UpdateNagger(SystemTrayItem* owner)
+      : owner_(owner) {
+    RestartTimer();
+    Shell::GetInstance()->tray()->widget()->GetNativeView()->layer()->
+        GetAnimator()->AddObserver(this);
+  }
+
+  virtual ~UpdateNagger() {
+    Shell::GetInstance()->tray()->widget()->GetNativeView()->layer()->
+        GetAnimator()->RemoveObserver(this);
+  }
+
+  void RestartTimer() {
+    timer_.Stop();
+    timer_.Start(FROM_HERE,
+                 base::TimeDelta::FromSeconds(kUpdateNaggingTimeSeconds),
+                 this,
+                 &UpdateNagger::Nag);
+  }
+
+ private:
+  void Nag() {
+    owner_->PopupDetailedView(kShowUpdateNaggerForSeconds, false);
+  }
+
+  // Overridden from ui::LayerAnimationObserver.
+  virtual void OnLayerAnimationEnded(
+      ui::LayerAnimationSequence* sequence) OVERRIDE {
+    if (Shell::GetInstance()->shelf()->IsVisible())
+      timer_.Stop();
+    else if (!timer_.IsRunning())
+      RestartTimer();
+  }
+
+  virtual void OnLayerAnimationAborted(
+      ui::LayerAnimationSequence* sequence) OVERRIDE {}
+
+  virtual void OnLayerAnimationScheduled(
+      ui::LayerAnimationSequence* sequence) OVERRIDE {}
+
+  SystemTrayItem* owner_;
+  base::OneShotTimer<UpdateNagger> timer_;
+
+  DISALLOW_COPY_AND_ASSIGN(UpdateNagger);
+};
+
+}  // namespace tray
+
 TrayUpdate::TrayUpdate()
     : TrayImageItem(IDR_AURA_UBER_TRAY_UPDATE) {
 }
@@ -72,11 +138,26 @@ views::View* TrayUpdate::CreateDefaultView(user::LoginStatus status) {
   return new UpdateView;
 }
 
-void TrayUpdate::DestroyDefaultView() {
+views::View* TrayUpdate::CreateDetailedView(user::LoginStatus status) {
+  return CreateDefaultView(status);
+}
+
+void TrayUpdate::DestroyDetailedView() {
+  if (nagger_.get()) {
+    // The nagger was being displayed. Now that the detailed view is being
+    // closed, that means either the user clicks on it to restart, or the user
+    // didn't click on it to restart. In either case, start the timer to show
+    // the nag reminder again after the specified time.
+    nagger_->RestartTimer();
+  }
 }
 
 void TrayUpdate::OnUpdateRecommended() {
   tray_view()->SetVisible(true);
+  if (!Shell::GetInstance()->shelf()->IsVisible() && !nagger_.get()) {
+    // The shelf is not visible, and there is no nagger scheduled.
+    nagger_.reset(new tray::UpdateNagger(this));
+  }
 }
 
 }  // namespace internal