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1 // Copyright (c) 2012 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_COMMON_WM_SYSTEM_MODAL_CONTAINER_LAYOUT_MANAGER_H_ | |
6 #define ASH_COMMON_WM_SYSTEM_MODAL_CONTAINER_LAYOUT_MANAGER_H_ | |
7 | |
8 #include <memory> | |
9 #include <set> | |
10 #include <vector> | |
11 | |
12 #include "ash/ash_export.h" | |
13 #include "ash/common/wm/wm_snap_to_pixel_layout_manager.h" | |
14 #include "base/macros.h" | |
15 #include "ui/aura/window_observer.h" | |
16 #include "ui/keyboard/keyboard_controller_observer.h" | |
17 | |
18 namespace gfx { | |
19 class Rect; | |
20 } | |
21 | |
22 namespace ash { | |
23 class WindowDimmer; | |
24 | |
25 // LayoutManager for the modal window container. | |
26 // System modal windows which are centered on the screen will be kept centered | |
27 // when the container size changes. | |
28 class ASH_EXPORT SystemModalContainerLayoutManager | |
29 : public wm::WmSnapToPixelLayoutManager, | |
30 public aura::WindowObserver, | |
31 public keyboard::KeyboardControllerObserver { | |
32 public: | |
33 explicit SystemModalContainerLayoutManager(WmWindow* container); | |
34 ~SystemModalContainerLayoutManager() override; | |
35 | |
36 bool has_window_dimmer() const { return window_dimmer_ != nullptr; } | |
37 | |
38 // Overridden from WmSnapToPixelLayoutManager: | |
39 void OnChildWindowVisibilityChanged(WmWindow* child, bool visible) override; | |
40 void OnWindowResized() override; | |
41 void OnWindowAddedToLayout(WmWindow* child) override; | |
42 void OnWillRemoveWindowFromLayout(WmWindow* child) override; | |
43 void SetChildBounds(WmWindow* child, | |
44 const gfx::Rect& requested_bounds) override; | |
45 | |
46 // Overridden from aura::WindowObserver: | |
47 void OnWindowPropertyChanged(aura::Window* window, | |
48 const void* key, | |
49 intptr_t old) override; | |
50 | |
51 // Overridden from keyboard::KeyboardControllerObserver: | |
52 void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override; | |
53 void OnKeyboardClosed() override; | |
54 | |
55 // True if the window is either contained by the top most modal window, | |
56 // or contained by its transient children. | |
57 bool IsPartOfActiveModalWindow(WmWindow* window); | |
58 | |
59 // Activates next modal window if any. Returns false if there | |
60 // are no more modal windows in this layout manager. | |
61 bool ActivateNextModalWindow(); | |
62 | |
63 // Creates modal background window, which is a partially-opaque | |
64 // fullscreen window. If there is already a modal background window, | |
65 // it will bring it the top. | |
66 void CreateModalBackground(); | |
67 | |
68 void DestroyModalBackground(); | |
69 | |
70 // Is the |window| modal background? | |
71 static bool IsModalBackground(WmWindow* window); | |
72 | |
73 private: | |
74 void AddModalWindow(WmWindow* window); | |
75 | |
76 // Removes |window| from |modal_windows_|. Returns true if |window| was in | |
77 // |modal_windows_|. | |
78 bool RemoveModalWindow(WmWindow* window); | |
79 | |
80 // Reposition the dialogs to become visible after the work area changes. | |
81 void PositionDialogsAfterWorkAreaResize(); | |
82 | |
83 // Get the usable bounds rectangle for enclosed dialogs. | |
84 gfx::Rect GetUsableDialogArea() const; | |
85 | |
86 // Gets the new bounds for a |window| to use which are either centered (if the | |
87 // window was previously centered) or fitted to the screen. | |
88 gfx::Rect GetCenteredAndOrFittedBounds(const WmWindow* window); | |
89 | |
90 // Returns true if |bounds| is considered centered. | |
91 bool IsBoundsCentered(const gfx::Rect& window_bounds) const; | |
92 | |
93 WmWindow* modal_window() { | |
94 return !modal_windows_.empty() ? modal_windows_.back() : nullptr; | |
95 } | |
96 | |
97 // The container that owns the layout manager. | |
98 WmWindow* container_; | |
99 | |
100 // WindowDimmer used to dim windows behind the modal window(s) being shown in | |
101 // |container_|. | |
102 std::unique_ptr<WindowDimmer> window_dimmer_; | |
103 | |
104 // A stack of modal windows. Only the topmost can receive events. | |
105 std::vector<WmWindow*> modal_windows_; | |
106 | |
107 // Windows contained in this set are centered. Windows are automatically | |
108 // added to this based on IsBoundsCentered(). | |
109 std::set<const WmWindow*> windows_to_center_; | |
110 | |
111 DISALLOW_COPY_AND_ASSIGN(SystemModalContainerLayoutManager); | |
112 }; | |
113 | |
114 } // namespace ash | |
115 | |
116 #endif // ASH_COMMON_WM_SYSTEM_MODAL_CONTAINER_LAYOUT_MANAGER_H_ | |
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