Torne (Richard Coles) | 46d4c2b | 2014-06-09 12:00:27 +0100 | [diff] [blame] | 1 | // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef ASH_WM_LOCK_WINDOW_STATE_H_ |
| 6 | #define ASH_WM_LOCK_WINDOW_STATE_H_ |
| 7 | |
| 8 | #include "ash/wm/window_state.h" |
| 9 | |
| 10 | namespace ash { |
| 11 | |
| 12 | // The LockWindowState implementation which reduces all possible window |
| 13 | // states to maximized (or normal if can't be maximized)/minimized/full-screen |
| 14 | // and is applied only on lock (login) window container. |
| 15 | // LockWindowState implements Ash behavior without state machine. |
| 16 | class LockWindowState : public wm::WindowState::State { |
| 17 | public: |
| 18 | // The |window|'s state object will be modified to use this new window mode |
| 19 | // state handler. |
| 20 | explicit LockWindowState(aura::Window* window); |
| 21 | virtual ~LockWindowState(); |
| 22 | |
| 23 | // WindowState::State overrides: |
| 24 | virtual void OnWMEvent(wm::WindowState* window_state, |
| 25 | const wm::WMEvent* event) OVERRIDE; |
| 26 | virtual wm::WindowStateType GetType() const OVERRIDE; |
| 27 | virtual void AttachState(wm::WindowState* window_state, |
| 28 | wm::WindowState::State* previous_state) OVERRIDE; |
| 29 | virtual void DetachState(wm::WindowState* window_state) OVERRIDE; |
| 30 | |
| 31 | // Creates new LockWindowState instance and attaches it to |window|. |
| 32 | static wm::WindowState* SetLockWindowState(aura::Window* window); |
| 33 | |
| 34 | private: |
| 35 | // Updates the window to |new_state_type| and resulting bounds: |
| 36 | // Either full screen, maximized centered or minimized. If the state does not |
| 37 | // change, only the bounds will be changed. |
| 38 | void UpdateWindow(wm::WindowState* window_state, |
| 39 | wm::WindowStateType new_state_type); |
| 40 | |
| 41 | // Depending on the capabilities of the window we either return |
| 42 | // |WINDOW_STATE_TYPE_MAXIMIZED| or |WINDOW_STATE_TYPE_NORMAL|. |
| 43 | wm::WindowStateType GetMaximizedOrCenteredWindowType( |
| 44 | wm::WindowState* window_state); |
| 45 | |
| 46 | // Updates the bounds taking virtual keyboard bounds into consideration. |
| 47 | void UpdateBounds(wm::WindowState* window_state); |
| 48 | |
| 49 | // The current state type. Due to the nature of this state, this can only be |
| 50 | // WM_STATE_TYPE{NORMAL, MINIMIZED, MAXIMIZED}. |
| 51 | wm::WindowStateType current_state_type_; |
| 52 | |
| 53 | DISALLOW_COPY_AND_ASSIGN(LockWindowState); |
| 54 | }; |
| 55 | |
| 56 | } // namespace ash |
| 57 | |
| 58 | #endif // ASH_WM_LOCK_WINDOW_STATE_H_ |