Show small notification icons in notification tray

ash/common/system/web_notification/web_notification_tray.cc

 // 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/common/system/web_notification/web_notification_tray.h"
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ skipping 45 matching lines @@
 }
 
 }  // namespace message_center
 
 #endif  // defined(OS_CHROMEOS)
 
 namespace ash {
 namespace {
 
 // Menu commands
-const int kToggleQuietMode = 0;
-const int kEnableQuietModeDay = 2;
+constexpr int kToggleQuietMode = 0;
+constexpr int kEnableQuietModeDay = 2;
+
+constexpr int kMaximumSmallIconCount = 3;
+
+constexpr gfx::Size kTrayItemInnerIconSize = gfx::Size(16, 16);
+constexpr gfx::Size kTrayItemInnerBellIconSize = gfx::Size(18, 18);

[oshima, 2016/08/04 18:15:21]

I think you can do

kTrayItemInnerIconSize(16, 16)

please ignore if it does not work.

[yoshiki, 2016/08/05 13:30:47]

Done.

+
+constexpr int kTrayItemWidth = 26;
+constexpr int kTrayItemHeight = 26;

[oshima, 2016/08/04 18:15:21]

can this also be gfx::Size ?

[yoshiki, 2016/08/05 13:30:47]

Done.

+constexpr int kTrayItemHorizontalInset = 6;
+constexpr int kTrayItemVerticalInset = 6;
+
+constexpr int kTrayItemAnimationDurationMS = 200;
+
+static int round(double d) {
+  return std::floor(d + 0.5);
+}

[oshima, 2016/08/04 18:15:20]

gfx::ToRoundedInt

[yoshiki, 2016/08/05 13:30:48]

Done.

 }
 
 namespace {
 
 const SkColor kWebNotificationColorNoUnread =
     SkColorSetARGB(128, 255, 255, 255);
 const SkColor kWebNotificationColorWithUnread = SK_ColorWHITE;
 const int kNoUnreadIconSize = 18;
 }
 
@@ skipping 30 matching lines @@
   // Convenience accessors.
   views::TrayBubbleView* bubble_view() const { return bubble_->bubble_view(); }
 
  private:
   std::unique_ptr<message_center::MessageBubbleBase> bubble_;
   std::unique_ptr<TrayBubbleWrapper> bubble_wrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(WebNotificationBubbleWrapper);
 };
 
-class WebNotificationButton : public views::CustomButton {
+class WebNotificationItem : public views::View, public gfx::AnimationDelegate {
  public:
-  WebNotificationButton(views::ButtonListener* listener)
-      : views::CustomButton(listener),
-        is_bubble_visible_(false),
-        unread_count_(0) {
+  WebNotificationItem(gfx::AnimationContainer* container,
+                      WebNotificationTray* tray)
+      : tray_(tray) {
+    SetPaintToLayer(true);
+    layer()->SetFillsBoundsOpaquely(false);
+    views::View::SetVisible(false);
+    set_owned_by_client();
+
     SetLayoutManager(new views::FillLayout);
 
-    gfx::ImageSkia image;
-    if (MaterialDesignController::IsShelfMaterial()) {
-      image = CreateVectorIcon(gfx::VectorIconId::SHELF_NOTIFICATIONS,
-                               kShelfIconColor);
-    } else {
-      image =
-          CreateVectorIcon(gfx::VectorIconId::NOTIFICATIONS, kNoUnreadIconSize,
-                           kWebNotificationColorNoUnread);
+    animation_.reset(new gfx::SlideAnimation(this));
+    animation_->SetContainer(container);
+    animation_->SetSlideDuration(kTrayItemAnimationDurationMS);
+    animation_->SetTweenType(gfx::Tween::LINEAR);
+  }
+
+  void SetVisible(bool set_visible) override {
+    if (!GetWidget()) {
+      views::View::SetVisible(set_visible);
+      return;
     }
 
-    no_unread_icon_.SetImage(image);
-    no_unread_icon_.set_owned_by_client();
-
-    unread_label_.set_owned_by_client();
-    SetupLabelForTray(&unread_label_);
-
-    AddChildView(&no_unread_icon_);
+    if (!set_visible) {
+      animation_->Hide();
+      AnimationProgressed(animation_.get());
+    } else {
+      animation_->Show();
+      AnimationProgressed(animation_.get());
+      views::View::SetVisible(true);
+    }
   }
 
-  void SetBubbleVisible(bool visible) {
-    if (visible == is_bubble_visible_)
-      return;
+  void HideAndDelete() {
+    SetVisible(false);
 
-    is_bubble_visible_ = visible;
-    UpdateIconVisibility();
-  }
-
-  void SetUnreadCount(int unread_count) {
-    // base::FormatNumber doesn't convert to arabic numeric characters.
-    // TODO(mukai): use ICU to support conversion for such locales.
-    unread_count_ = unread_count;
-    UpdateIconVisibility();
+    if (!visible() && !animation_->is_animating()) {
+      if (parent())
+        parent()->RemoveChildView(this);
+      base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
+    } else {
+      delete_after_animation_ = true;
+    }
   }
 
  protected:
   // Overridden from views::ImageButton:
   gfx::Size GetPreferredSize() const override {
-    const int size = GetTrayConstant(TRAY_ITEM_HEIGHT_LEGACY);
-    return gfx::Size(size, size);
+    gfx::Size size = gfx::Size(kTrayItemWidth, kTrayItemHeight);
+    if (!animation_.get() || !animation_->is_animating())
+      return size;
+    if (IsHorizontalAlignment(tray_->shelf_alignment())) {

[oshima, 2016/08/04 18:15:21]

since it's used in many places now, it's probably better to just add
IsHorizontal(Alignment/Lyaout) or something like that.

[yoshiki, 2016/08/05 13:30:48]

Done.

+      size.set_width(
+          std::max(1, round(size.width() * animation_->GetCurrentValue())));
+    } else {
+      size.set_height(
+          std::max(1, round(size.height() * animation_->GetCurrentValue())));
+    }
+    return size;
   }

[oshima, 2016/08/04 18:15:21]

I guess we can't just clip it because there are multiple of these?

Can you add comment why we need to update the preferred size?

[yoshiki, 2016/08/05 13:30:48]

Done.

 
   int GetHeightForWidth(int width) const override {
     return GetPreferredSize().height();
   }
 
  private:
-  void UpdateIconVisibility() {
-    if (unread_count_ == 0) {
-      if (!Contains(&no_unread_icon_)) {
-        RemoveAllChildViews(false /* delete_children */);
-        AddChildView(&no_unread_icon_);
-      }
+  // Overridden from gfx::AnimationDelegate.

[oshima, 2016/08/04 18:15:21]

// gfx::AnimationDelegate:

[yoshiki, 2016/08/05 13:30:47]

Done.

+  void AnimationProgressed(const gfx::Animation* animation) override {
+    gfx::Transform transform;
+    if (IsHorizontalAlignment(tray_->shelf_alignment())) {
+      transform.Translate(0, animation->CurrentValueBetween(
+                                 static_cast<double>(height()) / 2, 0.));
     } else {
-      if (!Contains(&unread_label_)) {
-        RemoveAllChildViews(false /* delete_children */);
-        AddChildView(&unread_label_);
-      }
+      transform.Translate(
+          animation->CurrentValueBetween(static_cast<double>(width() / 2), 0.),
+          0);
+    }
+    transform.Scale(animation->GetCurrentValue(), animation->GetCurrentValue());
+    layer()->SetTransform(transform);
+    PreferredSizeChanged();
+  }
+  void AnimationEnded(const gfx::Animation* animation) override {
+    if (animation->GetCurrentValue() < 0.1)
+      views::View::SetVisible(false);
 
-      // TODO(mukai): move NINE_PLUS message to ui_strings, it doesn't need to
-      // be in ash_strings.
-      unread_label_.SetText(
-          (unread_count_ > 9) ? l10n_util::GetStringUTF16(
-                                    IDS_ASH_NOTIFICATION_UNREAD_COUNT_NINE_PLUS)
-                              : base::FormatNumber(unread_count_));
-      unread_label_.SetEnabledColor((unread_count_ > 0)
-                                        ? kWebNotificationColorWithUnread
-                                        : kWebNotificationColorNoUnread);
+    if (delete_after_animation_) {
+      if (parent())
+        parent()->RemoveChildView(this);
+      base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
     }
+  }
+  void AnimationCanceled(const gfx::Animation* animation) override {
+    AnimationEnded(animation);
+  }
+
+  std::unique_ptr<gfx::SlideAnimation> animation_;
+  bool delete_after_animation_ = false;
+  WebNotificationTray* tray_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebNotificationItem);
+};
+
+class WebNotificationImage : public WebNotificationItem {
+ public:
+  WebNotificationImage(const gfx::ImageSkia& image,
+                       gfx::Size size,
+                       gfx::AnimationContainer* container,
+                       WebNotificationTray* tray)
+      : WebNotificationItem(container, tray) {
+    view_ = new views::ImageView();
+    view_->SetImage(image);
+    view_->SetImageSize(size);
+    AddChildView(view_);
+  }
+
+ private:
+  views::ImageView* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebNotificationImage);
+};
+
+class WebNotificationLabel : public WebNotificationItem {
+ public:
+  WebNotificationLabel(gfx::AnimationContainer* container,
+                       WebNotificationTray* tray)
+      : WebNotificationItem(container, tray) {
+    view_ = new views::Label();
+    SetupLabelForTray(view_);
+  }
+
+  void SetUnreadCount(int unread_count) {
+    // TODO(mukai): move NINE_PLUS message to ui_strings, it doesn't need to
+    // be in ash_strings.
+    view_->SetText((unread_count > 9)
+                       ? l10n_util::GetStringUTF16(
+                             IDS_ASH_NOTIFICATION_UNREAD_COUNT_NINE_PLUS)
+                       : base::FormatNumber(unread_count));
+    view_->SetEnabledColor(kWebNotificationColorWithUnread);
+    AddChildView(view_);
     SchedulePaint();
   }
 
-  bool is_bubble_visible_;
-  int unread_count_;
+ private:
+  views::Label* view_;
 
-  views::ImageView no_unread_icon_;
-  views::Label unread_label_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebNotificationButton);
+  DISALLOW_COPY_AND_ASSIGN(WebNotificationLabel);
 };
 
 WebNotificationTray::WebNotificationTray(WmShelf* shelf,
                                          WmWindow* status_area_window,
                                          SystemTray* system_tray)
     : TrayBackgroundView(shelf),
       status_area_window_(status_area_window),
       system_tray_(system_tray),
-      button_(nullptr),
       show_message_center_on_unlock_(false),
       should_update_tray_content_(false),
       should_block_shelf_auto_hide_(false) {
   DCHECK(shelf);
   DCHECK(status_area_window_);
   DCHECK(system_tray_);
-  button_ = new WebNotificationButton(this);
-  button_->set_triggerable_event_flags(ui::EF_LEFT_MOUSE_BUTTON |
-                                       ui::EF_RIGHT_MOUSE_BUTTON);
-  tray_container()->AddChildView(button_);
-  button_->SetFocusBehavior(FocusBehavior::NEVER);
+
+  gfx::ImageSkia bell_image;
+  if (MaterialDesignController::IsShelfMaterial()) {
+    bell_image = CreateVectorIcon(gfx::VectorIconId::SHELF_NOTIFICATIONS,
+                                  kShelfIconColor);
+  } else {
+    bell_image =
+        CreateVectorIcon(gfx::VectorIconId::NOTIFICATIONS, kNoUnreadIconSize,
+                         kWebNotificationColorNoUnread);
+  }
+  bell_icon_.reset(new WebNotificationImage(bell_image,
+                                            kTrayItemInnerBellIconSize,
+                                            animation_container_.get(), this));
+  tray_container()->AddChildView(bell_icon_.get());
+
+  counter_.reset(new WebNotificationLabel(animation_container_.get(), this));
+  tray_container()->AddChildView(counter_.get());
+
   SetContentsBackground();
   tray_container()->SetBorder(views::Border::NullBorder());
   message_center_tray_.reset(new message_center::MessageCenterTray(
       this, message_center::MessageCenter::Get()));
   popup_alignment_delegate_.reset(new AshPopupAlignmentDelegate(shelf));
   popup_collection_.reset(new message_center::MessagePopupCollection(
       message_center(), message_center_tray_.get(),
       popup_alignment_delegate_.get()));
   const display::Display& display =
       status_area_window_->GetDisplayNearestWindow();
   popup_alignment_delegate_->StartObserving(display::Screen::GetScreen(),
                                             display);
   OnMessageCenterTrayChanged();
+
+  tray_container()->set_insets(
+      gfx::Insets(kTrayItemHorizontalInset, kTrayItemVerticalInset));
 }
 
 WebNotificationTray::~WebNotificationTray() {
   // Release any child views that might have back pointers before ~View().
   message_center_bubble_.reset();
   popup_alignment_delegate_.reset();
   popup_collection_.reset();
 }
 
 // Public methods.
@@ skipping 19 matching lines @@
   }
   message_center_bubble->SetMaxHeight(
       std::max(0, max_height - GetTrayConstant(TRAY_SPACING)));
   if (show_settings)
     message_center_bubble->SetSettingsVisible();
   message_center_bubble_.reset(
       new WebNotificationBubbleWrapper(this, message_center_bubble));
 
   system_tray_->SetHideNotifications(true);
   shelf()->UpdateAutoHideState();
-  button_->SetBubbleVisible(true);
   SetDrawBackgroundAsActive(true);
   return true;
 }
 
 bool WebNotificationTray::ShowMessageCenter() {
   return ShowMessageCenterInternal(false /* show_settings */);
 }
 
 void WebNotificationTray::HideMessageCenter() {
   if (!message_center_bubble())
     return;
   SetDrawBackgroundAsActive(false);
   message_center_bubble_.reset();
   should_block_shelf_auto_hide_ = false;
   show_message_center_on_unlock_ = false;
   system_tray_->SetHideNotifications(false);
   shelf()->UpdateAutoHideState();
-  button_->SetBubbleVisible(false);
 }
 
 void WebNotificationTray::SetTrayBubbleHeight(int height) {
   popup_alignment_delegate_->SetTrayBubbleHeight(height);
 }
 
 int WebNotificationTray::tray_bubble_height_for_test() const {
   return popup_alignment_delegate_->tray_bubble_height_for_test();
 }
 
@@ skipping 148 matching lines @@
     bool in_quiet_mode = message_center()->IsQuietMode();
     message_center()->SetQuietMode(!in_quiet_mode);
     return;
   }
   base::TimeDelta expires_in = command_id == kEnableQuietModeDay
                                    ? base::TimeDelta::FromDays(1)
                                    : base::TimeDelta::FromHours(1);
   message_center()->EnterQuietModeWithExpire(expires_in);
 }
 
-void WebNotificationTray::ButtonPressed(views::Button* sender,
-                                        const ui::Event& event) {
-  DCHECK_EQ(button_, sender);
-  PerformAction(event);
-}
-
 void WebNotificationTray::OnMessageCenterTrayChanged() {
   // Do not update the tray contents directly. Multiple change events can happen
   // consecutively, and calling Update in the middle of those events will show
   // intermediate unread counts for a moment.
   should_update_tray_content_ = true;
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&WebNotificationTray::UpdateTrayContent, AsWeakPtr()));
 }
 
 void WebNotificationTray::UpdateTrayContent() {
   if (!should_update_tray_content_)
     return;
   should_update_tray_content_ = false;
 
+  std::set<std::string> notification_ids;

[oshima, 2016/08/04 18:15:21]

unorderd_set or you can just use vector (which is probably faster), whichever
you like.

[yoshiki, 2016/08/05 13:30:48]

Let me use unordered_map, since I want to show that duplication is not permitted
and this is not "hot-code".

+  for (auto i : visible_small_icons_) {
+    notification_ids.insert(i.first);
+  }
+
+  // Add small icons (up to kMaximumSmallIconCount = 3).
   message_center::MessageCenter* message_center =
       message_center_tray_->message_center();
-  button_->SetUnreadCount(message_center->UnreadNotificationCount());
-  if (IsMessageCenterBubbleVisible())
-    button_->SetState(views::CustomButton::STATE_PRESSED);
-  else
-    button_->SetState(views::CustomButton::STATE_NORMAL);
+  size_t visible_small_icon_count = 0;
+  for (const auto* notification : message_center->GetVisibleNotifications()) {
+    gfx::Image image = notification->small_image();
+    if (image.IsEmpty())
+      continue;
+
+    if (visible_small_icon_count >= kMaximumSmallIconCount)
+      break;
+    visible_small_icon_count++;
+
+    notification_ids.erase(notification->id());
+    if (visible_small_icons_.count(notification->id()) != 0)
+      continue;
+
+    auto* item =
+        new WebNotificationImage(image.AsImageSkia(), kTrayItemInnerIconSize,
+                                 animation_container_.get(), this);
+    visible_small_icons_.insert(std::make_pair(notification->id(), item));
+
+    tray_container()->AddChildViewAt(item, 0);
+    item->SetVisible(true);
+  }
+
+  // Remove unnecessary icons.
+  for (const std::string& id : notification_ids) {
+    WebNotificationImage* item = visible_small_icons_[id];
+    visible_small_icons_.erase(id);
+    item->HideAndDelete();
+  }
+
+  // Show or hide the bell icon.
+  size_t visible_notification_count = message_center->NotificationCount();
+  bell_icon_->SetVisible(visible_notification_count == 0);
+
+  // Show or hide the counter.
+  size_t hidden_icon_count =
+      visible_notification_count - visible_small_icon_count;
+  if (hidden_icon_count != 0) {
+    counter_->SetVisible(true);
+    counter_->SetUnreadCount(hidden_icon_count);
+  } else {
+    counter_->SetVisible(false);
+  }
 
   SetVisible(IsLoggedIn());
+  PreferredSizeChanged();
   Layout();
   SchedulePaint();
   if (IsLoggedIn())
     system_tray_->SetNextFocusableView(this);
 }
 
 void WebNotificationTray::ClickedOutsideBubble() {
   // Only hide the message center
   if (!message_center_bubble())
     return;
@@ skipping 20 matching lines @@
 
 message_center::MessageCenterBubble*
 WebNotificationTray::GetMessageCenterBubbleForTest() {
   if (!message_center_bubble())
     return NULL;
   return static_cast<message_center::MessageCenterBubble*>(
       message_center_bubble()->bubble());
 }
 
 }  // namespace ash