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// 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 CHROMEOS_UI_FRAME_IMMERSIVE_IMMERSIVE_FOCUS_WATCHER_H_
#define CHROMEOS_UI_FRAME_IMMERSIVE_IMMERSIVE_FOCUS_WATCHER_H_
#include "base/memory/raw_ptr.h"
#include "ui/aura/client/focus_change_observer.h"
#include "ui/aura/client/transient_window_client_observer.h"
#include "ui/views/focus/focus_manager.h"
#include "ui/wm/public/activation_change_observer.h"
namespace chromeos {
class ImmersiveFullscreenController;
class ImmersiveRevealedLock;
// ImmersiveFocusWatcher is responsible for grabbing a reveal lock based on
// activation and/or focus. This implementation grabs a lock if views focus is
// in the top view, a bubble is showing that is anchored to the top view, or
// the focused window is a transient child of the top view's widget.
class ImmersiveFocusWatcher
: public views::FocusChangeListener,
public aura::client::TransientWindowClientObserver,
public ::wm::ActivationChangeObserver {
public:
explicit ImmersiveFocusWatcher(ImmersiveFullscreenController* controller);
ImmersiveFocusWatcher(const ImmersiveFocusWatcher&) = delete;
ImmersiveFocusWatcher& operator=(const ImmersiveFocusWatcher&) = delete;
~ImmersiveFocusWatcher() override;
// Forces updating the status of the lock. That is, this determines whether
// a lock should be held and updates accordingly. The lock is automatically
// maintained, but this function may be called to force an update.
void UpdateFocusRevealedLock();
// Explicitly releases the lock, does nothing if a lock is not held.
void ReleaseLock();
private:
class BubbleObserver;
views::Widget* GetWidget();
aura::Window* GetWidgetWindow();
// Recreate |bubble_observer_| and start observing any bubbles anchored to a
// child of |top_container_|.
void RecreateBubbleObserver();
// views::FocusChangeListener overrides:
void OnDidChangeFocus(views::View* focused_before,
views::View* focused_now) override;
// aura::client::TransientWindowClientObserver overrides:
void OnTransientChildWindowAdded(aura::Window* window,
aura::Window* transient) override;
void OnTransientChildWindowRemoved(aura::Window* window,
aura::Window* transient) override;
// ::wm::ActivationChangeObserver:
void OnWindowActivated(
::wm::ActivationChangeObserver::ActivationReason reason,
aura::Window* gaining_active,
aura::Window* losing_active) override;
raw_ptr<ImmersiveFullscreenController> immersive_fullscreen_controller_;
// Lock which keeps the top-of-window views revealed based on the focused view
// and the active widget. Acquiring the lock never triggers a reveal because
// a view is not focusable till a reveal has made it visible.
std::unique_ptr<ImmersiveRevealedLock> lock_;
// Manages bubbles which are anchored to a child of
// |ImmersiveFullscreenController::top_container_|.
std::unique_ptr<BubbleObserver> bubble_observer_;
};
} // namespace chromeos
#endif // CHROMEOS_UI_FRAME_IMMERSIVE_IMMERSIVE_FOCUS_WATCHER_H_
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