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// Copyright 2017 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.
#include <memory>
#include "ash/ash_export.h"
#include "ash/lock_screen_action/lock_screen_action_background_observer.h"
#include "ash/lock_screen_action/lock_screen_action_background_state.h"
#include "ash/public/cpp/shelf_types.h"
#include "ash/tray_action/tray_action_observer.h"
#include "ash/wm/lock_layout_manager.h"
#include "base/macros.h"
#include "base/scoped_observer.h"
namespace ash {
class LockScreenActionBackgroundController;
class Shelf;
class TrayAction;
// Window layout manager for windows intended to handle lock tray actions.
// Since "new note" is currently the only supported action, the layout
// manager uses new note tray action state to determine it state.
// The layout is intended to be used for LockActionHandlerContainer. The
// container state depends on the lock screen "new_note" action state:
// * for active action state - the windows should be visible above the lock
// screen
// * for rest of the states - the windows should not be visible.
// The layout manager will observe new note action state changes and update
// the container's children state as needed.
// The windows in this container will have be maximized, if possible. If they
// are not resizable, they will be centered on the screen - similar to windows
// in lock screen container.
// Unlike lock layout manager, when maximizing windows, this layout manager will
// ensure that the windows do not obscure the system shelf.
class ASH_EXPORT LockActionHandlerLayoutManager
: public LockLayoutManager,
public TrayActionObserver,
public LockScreenActionBackgroundObserver {
aura::Window* window,
Shelf* shelf,
LockScreenActionBackgroundController* action_background_controller);
~LockActionHandlerLayoutManager() override;
// WmSnapToPixelLayoutManager:
void OnWindowAddedToLayout(aura::Window* child) override;
void OnChildWindowVisibilityChanged(aura::Window* child,
bool visibile) override;
// TrayActionObserver:
void OnLockScreenNoteStateChanged(mojom::TrayActionState state) override;
// LockScreenActionBackgroundObserver:
void OnLockScreenActionBackgroundStateChanged(
LockScreenActionBackgroundState state) override;
// Updates the child window visibility depending on lock screen note action
// state and the lock screen action background state.
void UpdateChildren(mojom::TrayActionState action_state,
LockScreenActionBackgroundState background_state);
LockScreenActionBackgroundController* action_background_controller_;
ScopedObserver<TrayAction, TrayActionObserver> tray_action_observer_;
} // namespace ash