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// Copyright 2023 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_LIST_QUICK_APP_ACCESS_MODEL_H_
#define ASH_APP_LIST_QUICK_APP_ACCESS_MODEL_H_
#include <optional>
#include <string>
#include "ash/app_list/model/app_list_item_observer.h"
#include "ash/public/cpp/app_list/app_list_controller_observer.h"
#include "base/observer_list.h"
#include "base/scoped_observation.h"
#include "base/time/time.h"
namespace gfx {
class ImageSkia;
class Size;
} // namespace gfx
namespace ash {
class AppListItem;
class AppListController;
// The model which holds information on which app is currently set as the quick
// app. Shelf home buttons observe changes to this model and will show/hide the
// quick app button accordingly.
class QuickAppAccessModel : public AppListItemObserver,
public AppListControllerObserver {
public:
class Observer : public base::CheckedObserver {
public:
~Observer() override = default;
// Called when the quick app shown state changes.
virtual void OnQuickAppShouldShowChanged(bool show_quick_app) = 0;
// Called when the default icon for the quick app icon changes.
virtual void OnQuickAppIconChanged() = 0;
};
QuickAppAccessModel();
QuickAppAccessModel(const QuickAppAccessModel&) = delete;
QuickAppAccessModel& operator=(const QuickAppAccessModel&) = delete;
~QuickAppAccessModel() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Set the quick app what will be shown next to home buttons in the shelf.
// Returns true when the quick app was changed to a valid `app_id` or reset
// using an empty `app_id`.
bool SetQuickApp(const std::string& app_id);
// Set the quick app as activated and update the quick app shown state.
void SetQuickAppActivated();
// Returns the quick app's icon as an image, sized to 'icon_size'.
gfx::ImageSkia GetAppIcon(gfx::Size icon_size);
// Returns the quick app's display name.
const std::u16string GetAppName() const;
const std::string& quick_app_id() const { return quick_app_id_; }
bool quick_app_should_show_state() const {
return quick_app_should_show_state_;
}
private:
// AppListItemObserver:
void ItemDefaultIconChanged() override;
void ItemIconVersionChanged() override;
void ItemBeingDestroyed() override;
// AppListControllerObserver:
void OnAppListVisibilityChanged(bool shown, int64_t display_id) override;
AppListItem* GetQuickAppItem() const;
// Checks if the should show state of the quick app has changed, and notifies
// observers when the state does change.
void UpdateQuickAppShouldShowState();
// Calculates and returns whether the quick app should show.
bool ShouldShowQuickApp();
// Reset the quick app id and other associated variables to their default
// values.
void ClearQuickApp();
// The time that the icon load is requested.
std::optional<base::TimeTicks> icon_load_start_time_;
base::ObserverList<Observer> observers_;
base::ScopedObservation<AppListItem, AppListItemObserver> item_observation_{
this};
base::ScopedObservation<AppListController, AppListControllerObserver>
app_list_controller_observer_{this};
// The app id for the quick app.
std::string quick_app_id_;
// Whether the quick app is in a state such that it should be shown.
bool quick_app_should_show_state_ = false;
};
} // namespace ash
#endif // ASH_APP_LIST_QUICK_APP_ACCESS_MODEL_H_
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