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// Copyright 2013 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_SHELF_SHELF_WINDOW_WATCHER_H_
#define ASH_SHELF_SHELF_WINDOW_WATCHER_H_
#include <set>
#include "ash/shell_observer.h"
#include "base/memory/raw_ptr.h"
#include "base/scoped_multi_source_observation.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/wm/public/activation_change_observer.h"
namespace ash {
class ShelfModel;
// ShelfWindowWatcher manages ShelfItems for dialogs in the default container
// with valid ShelfItemType and ShelfID window properties (ie. task manager).
// ShelfWindowWatcher also tracks the active shelf item via window activation.
class ShelfWindowWatcher : public ::wm::ActivationChangeObserver,
public ShellObserver {
public:
explicit ShelfWindowWatcher(ShelfModel* model);
ShelfWindowWatcher(const ShelfWindowWatcher&) = delete;
ShelfWindowWatcher& operator=(const ShelfWindowWatcher&) = delete;
~ShelfWindowWatcher() override;
private:
// Observes for windows being added to a root window's default container.
class ContainerWindowObserver : public aura::WindowObserver {
public:
explicit ContainerWindowObserver(ShelfWindowWatcher* window_watcher);
ContainerWindowObserver(const ContainerWindowObserver&) = delete;
ContainerWindowObserver& operator=(const ContainerWindowObserver&) = delete;
~ContainerWindowObserver() override;
private:
// aura::WindowObserver:
void OnWindowAdded(aura::Window* new_window) override;
void OnWindowDestroying(aura::Window* window) override;
raw_ptr<ShelfWindowWatcher> window_watcher_;
};
// Observes individual user windows to detect when they are closed or when
// their shelf item properties have changed.
class UserWindowObserver : public aura::WindowObserver {
public:
explicit UserWindowObserver(ShelfWindowWatcher* window_watcher);
UserWindowObserver(const UserWindowObserver&) = delete;
UserWindowObserver& operator=(const UserWindowObserver&) = delete;
~UserWindowObserver() override;
private:
// aura::WindowObserver:
void OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) override;
void OnWindowDestroying(aura::Window* window) override;
void OnWindowVisibilityChanged(aura::Window* window, bool visible) override;
void OnWindowTitleChanged(aura::Window* window) override;
raw_ptr<ShelfWindowWatcher> window_watcher_;
};
// Creates a ShelfItem for |window|.
void AddShelfItem(aura::Window* window);
// Removes a ShelfItem for |window|.
void RemoveShelfItem(aura::Window* window);
// Cleans up observers on |container|.
void OnContainerWindowDestroying(aura::Window* container);
// Adds a shelf item for new windows added to the default container that have
// valid ShelfItemType and ShelfID property values.
void OnUserWindowAdded(aura::Window* window);
// Adds, updates or removes the shelf item based on a property change.
void OnUserWindowPropertyChanged(aura::Window* window);
// Removes the shelf item when a window closes.
void OnUserWindowDestroying(aura::Window* window);
// wm::ActivationChangeObserver:
void OnWindowActivated(ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) override;
// ShellObserver:
void OnRootWindowAdded(aura::Window* root_window) override;
raw_ptr<ShelfModel> model_;
ContainerWindowObserver container_window_observer_{this};
UserWindowObserver user_window_observer_{this};
base::ScopedMultiSourceObservation<aura::Window, aura::WindowObserver>
observed_container_windows_;
base::ScopedMultiSourceObservation<aura::Window, aura::WindowObserver>
observed_user_windows_;
// The set of windows with shelf items managed by this ShelfWindowWatcher.
std::set<raw_ptr<aura::Window, SetExperimental>> user_windows_with_items_;
};
} // namespace ash
#endif // ASH_SHELF_SHELF_WINDOW_WATCHER_H_
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