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// Copyright 2013 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.
#ifndef ASH_SHELF_SHELF_WINDOW_WATCHER_H_
#define ASH_SHELF_SHELF_WINDOW_WATCHER_H_
#include <stdint.h>
#include "ash/shelf/scoped_observer_with_duplicated_sources.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/scoped_observer.h"
#include "ui/aura/window_observer.h"
#include "ui/gfx/display_observer.h"
#include "ui/wm/public/activation_change_observer.h"
namespace aura {
class Window;
namespace client {
class ActivationClient;
}
} // namespace aura
namespace ash {
class ShelfModel;
class ShelfItemDelegateManager;
// ShelfWindowWatcher creates and handles a ShelfItem for windows that have
// a ShelfItemDetails property in the default container.
class ShelfWindowWatcher : public aura::client::ActivationChangeObserver,
public aura::WindowObserver,
public gfx::DisplayObserver {
public:
ShelfWindowWatcher(ShelfModel* model,
ShelfItemDelegateManager* item_delegate_manager);
~ShelfWindowWatcher() override;
private:
class RootWindowObserver : public aura::WindowObserver {
public:
explicit RootWindowObserver(ShelfWindowWatcher* window_watcher);
~RootWindowObserver() override;
private:
// aura::WindowObserver overrides:
void OnWindowDestroying(aura::Window* window) override;
// Owned by Shell.
ShelfWindowWatcher* window_watcher_;
DISALLOW_COPY_AND_ASSIGN(RootWindowObserver);
};
// Used to track windows that are removed. See description of
// ShelfWindowWatcher::StartObservingRemovedWindow() for more details.
class RemovedWindowObserver : public aura::WindowObserver {
public:
explicit RemovedWindowObserver(ShelfWindowWatcher* window_watcher);
~RemovedWindowObserver() override;
private:
// aura::WindowObserver overrides:
void OnWindowParentChanged(aura::Window* window,
aura::Window* parent) override;
void OnWindowDestroyed(aura::Window* window) override;
// Owned by Shell.
ShelfWindowWatcher* window_watcher_;
DISALLOW_COPY_AND_ASSIGN(RemovedWindowObserver);
};
// Creates a ShelfItem for |window| that has ShelfItemDetails.
void AddShelfItem(aura::Window* window);
// Removes a ShelfItem for |window|.
void RemoveShelfItem(aura::Window* window);
// Adds observer to default container and ActivationClient of |root_window|.
void OnRootWindowAdded(aura::Window* root_window);
// Removes observer from ActivationClient of |root_window|.
void OnRootWindowRemoved(aura::Window* root_window);
// Updates the status of ShelfItem for |window|.
void UpdateShelfItemStatus(aura::Window* window, bool is_active);
// Returns the index of ShelfItem associated with |window|.
int GetShelfItemIndexForWindow(aura::Window* window) const;
// Used when a window is removed. During the dragging a window may be removed
// and when the drag completes added back. When this happens we don't want to
// remove the shelf item. StartObservingRemovedWindow, if necessary, attaches
// an observer. When done, FinishObservingRemovedWindow() is invoked.
void StartObservingRemovedWindow(aura::Window* window);
// Stop observing |window| by RemovedWindowObserver and remove an item
// associated with |window|.
void FinishObservingRemovedWindow(aura::Window* window);
// aura::client::ActivationChangeObserver overrides:
void OnWindowActivated(
aura::client::ActivationChangeObserver::ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) override;
// aura::WindowObserver overrides:
void OnWindowAdded(aura::Window* window) override;
void OnWillRemoveWindow(aura::Window* window) override;
void OnWindowDestroying(aura::Window* window) override;
void OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) override;
// gfx::DisplayObserver overrides:
void OnDisplayAdded(const gfx::Display& display) override;
void OnDisplayRemoved(const gfx::Display& old_display) override;
void OnDisplayMetricsChanged(const gfx::Display& display,
uint32_t metrics) override;
// Owned by Shell.
ShelfModel* model_;
ShelfItemDelegateManager* item_delegate_manager_;
RootWindowObserver root_window_observer_;
RemovedWindowObserver removed_window_observer_;
// Holds all observed windows.
ScopedObserver<aura::Window, aura::WindowObserver> observed_windows_;
// Holds all observed root windows.
ScopedObserver<aura::Window, aura::WindowObserver> observed_root_windows_;
// Holds removed windows that has an item from default container.
ScopedObserver<aura::Window, aura::WindowObserver> observed_removed_windows_;
// Holds all observed activation clients.
ScopedObserverWithDuplicatedSources<aura::client::ActivationClient,
aura::client::ActivationChangeObserver> observed_activation_clients_;
DISALLOW_COPY_AND_ASSIGN(ShelfWindowWatcher);
};
} // namespace ash
#endif // ASH_SHELF_SHELF_WINDOW_WATCHER_H_
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