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// Copyright 2014 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_WM_LOCK_WINDOW_STATE_H_
#define ASH_WM_LOCK_WINDOW_STATE_H_
#include "ash/wm/window_state.h"
namespace ash {
// The LockWindowState implementation which reduces all possible window
// states to maximized (or normal if can't be maximized)/minimized/full-screen
// and is applied only on lock (login) window container.
// LockWindowState implements Ash behavior without state machine.
class LockWindowState : public wm::WindowState::State {
public:
// The |window|'s state object will be modified to use this new window mode
// state handler.
explicit LockWindowState(aura::Window* window);
~LockWindowState() override;
// WindowState::State overrides:
void OnWMEvent(wm::WindowState* window_state,
const wm::WMEvent* event) override;
wm::WindowStateType GetType() const override;
void AttachState(wm::WindowState* window_state,
wm::WindowState::State* previous_state) override;
void DetachState(wm::WindowState* window_state) override;
// Creates new LockWindowState instance and attaches it to |window|.
static wm::WindowState* SetLockWindowState(aura::Window* window);
private:
// Updates the window to |new_state_type| and resulting bounds:
// Either full screen, maximized centered or minimized. If the state does not
// change, only the bounds will be changed.
void UpdateWindow(wm::WindowState* window_state,
wm::WindowStateType new_state_type);
// Depending on the capabilities of the window we either return
// |WINDOW_STATE_TYPE_MAXIMIZED| or |WINDOW_STATE_TYPE_NORMAL|.
wm::WindowStateType GetMaximizedOrCenteredWindowType(
wm::WindowState* window_state);
// Updates the bounds taking virtual keyboard bounds into consideration.
void UpdateBounds(wm::WindowState* window_state);
// The current state type. Due to the nature of this state, this can only be
// WM_STATE_TYPE{NORMAL, MINIMIZED, MAXIMIZED}.
wm::WindowStateType current_state_type_;
DISALLOW_COPY_AND_ASSIGN(LockWindowState);
};
} // namespace ash
#endif // ASH_WM_LOCK_WINDOW_STATE_H_
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