ash/app_menu/notification_overflow_view.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ASH_APP_MENU_NOTIFICATION_OVERFLOW_VIEW_H_
#define ASH_APP_MENU_NOTIFICATION_OVERFLOW_VIEW_H_

#include <memory>
#include <vector>

#include "ash/app_menu/app_menu_export.h"
#include "ash/app_menu/notification_item_view.h"
#include "base/memory/raw_ptr.h"
#include "ui/base/metadata/metadata_header_macros.h"
#include "ui/views/view.h"

namespace message_center {
class ProportionalImageView;
}

namespace views {
class MenuSeparator;
}

namespace ash {
class NotificationOverflowImageView;

class APP_MENU_EXPORT NotificationOverflowView : public views::View {
  METADATA_HEADER(NotificationOverflowView, views::View)

 public:
  NotificationOverflowView();

  NotificationOverflowView(const NotificationOverflowView&) = delete;
  NotificationOverflowView& operator=(const NotificationOverflowView&) = delete;

  ~NotificationOverflowView() override;

  // Creates a copy of |image_view| and adds it as a child view, using
  // |notification_id| as an identifier.
  void AddIcon(const message_center::ProportionalImageView& image_view,
               const std::string& notification_id);

  // Removes an icon by its |notification_id|.
  void RemoveIcon(const std::string& notification_id);

  // views::View overrides:
  void Layout(PassKey) override;
  gfx::Size CalculatePreferredSize(
      const views::SizeBounds& available_size) const override;

  // Whether this has notifications to show.
  bool is_empty() const { return image_views_.empty(); }

 private:
  // Removes |overflow_icon_| if it is no longer needed.
  void MaybeRemoveOverflowIcon();

  // The horizontal separator that is placed between the displayed
  // NotificationItemView and the overflow icons. Owned by the views hierarchy.
  raw_ptr<views::MenuSeparator> separator_;

  // The list of overflow icons. Listed in right to left ordering.
  std::vector<raw_ptr<NotificationOverflowImageView, VectorExperimental>>
      image_views_;

  // The overflow icon shown when there are more than |kMaxOverflowIcons|
  // notifications.
  raw_ptr<message_center::ProportionalImageView> overflow_icon_ = nullptr;
};

}  // namespace ash

#endif  // ASH_APP_MENU_NOTIFICATION_OVERFLOW_VIEW_H_