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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_TABLET_MODE_TABLET_MODE_WINDOW_STATE_H_ | |
6 #define ASH_WM_TABLET_MODE_TABLET_MODE_WINDOW_STATE_H_ | |
7 | |
8 #include <memory> | |
9 | |
10 #include "ash/wm/window_state.h" | |
11 #include "base/macros.h" | |
12 | |
13 namespace ash { | |
14 class TabletModeWindowManager; | |
15 | |
16 // The TabletModeWindowState implementation which reduces all possible window | |
17 // states to minimized and maximized. If a window cannot be maximized it will be | |
18 // set to normal. If a window cannot fill the entire workspace it will be | |
19 // centered within the workspace. | |
20 class TabletModeWindowState : public wm::WindowState::State { | |
21 public: | |
22 // Called when the window position might need to be updated. | |
23 static void UpdateWindowPosition(wm::WindowState* window_state); | |
24 | |
25 // The |window|'s state object will be modified to use this new window mode | |
26 // state handler. Upon destruction it will restore the previous state handler | |
27 // and call |creator::WindowStateDestroyed()| to inform that the window mode | |
28 // was reverted to the old window manager. | |
29 TabletModeWindowState(aura::Window* window, TabletModeWindowManager* creator); | |
30 ~TabletModeWindowState() override; | |
31 | |
32 void set_ignore_wm_events(bool ignore) { ignore_wm_events_ = ignore; } | |
33 | |
34 // Leaves the tablet mode by reverting to previous state object. | |
35 void LeaveTabletMode(wm::WindowState* window_state); | |
36 | |
37 // Sets whether to ignore bounds updates. If set to false, immediately does a | |
38 // bounds update as the current window bounds may no longer be correct. | |
39 void SetDeferBoundsUpdates(bool defer_bounds_updates); | |
40 | |
41 // WindowState::State overrides: | |
42 void OnWMEvent(wm::WindowState* window_state, | |
43 const wm::WMEvent* event) override; | |
44 | |
45 wm::WindowStateType GetType() const override; | |
46 void AttachState(wm::WindowState* window_state, | |
47 wm::WindowState::State* previous_state) override; | |
48 void DetachState(wm::WindowState* window_state) override; | |
49 | |
50 private: | |
51 // Updates the window to |new_state_type| and resulting bounds: | |
52 // Either full screen, maximized centered or minimized. If the state does not | |
53 // change, only the bounds will be changed. If |animate| is set, the bound | |
54 // change get animated. | |
55 void UpdateWindow(wm::WindowState* window_state, | |
56 wm::WindowStateType new_state_type, | |
57 bool animate); | |
58 | |
59 // Depending on the capabilities of the window we either return | |
60 // |WINDOW_STATE_TYPE_MAXIMIZED| or |WINDOW_STATE_TYPE_NORMAL|. | |
61 wm::WindowStateType GetMaximizedOrCenteredWindowType( | |
62 wm::WindowState* window_state); | |
63 | |
64 // Updates the bounds to the maximum possible bounds according to the current | |
65 // window state. If |animated| is set we animate the change. | |
66 void UpdateBounds(wm::WindowState* window_state, bool animated); | |
67 | |
68 // The original state object of the window. | |
69 std::unique_ptr<wm::WindowState::State> old_state_; | |
70 | |
71 // The window whose WindowState owns this instance. | |
72 aura::Window* window_; | |
73 | |
74 // The creator which needs to be informed when this state goes away. | |
75 TabletModeWindowManager* creator_; | |
76 | |
77 // The current state type. Due to the nature of this state, this can only be | |
78 // WM_STATE_TYPE{NORMAL, MINIMIZED, MAXIMIZED}. | |
79 wm::WindowStateType current_state_type_; | |
80 | |
81 // If true, do not update bounds. | |
82 bool defer_bounds_updates_; | |
83 | |
84 // If true, the state will not process events. | |
85 bool ignore_wm_events_ = false; | |
86 | |
87 DISALLOW_COPY_AND_ASSIGN(TabletModeWindowState); | |
88 }; | |
89 | |
90 } // namespace ash | |
91 | |
92 #endif // ASH_WM_TABLET_MODE_TABLET_MODE_WINDOW_STATE_H_ | |
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