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Side by Side Diff: ash/wm/screen_pinning_controller.h

Issue 2072853002: Implement "pinned" mode in ash. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: address comments Created 4 years, 6 months ago
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1 // Copyright 2016 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_SCREEN_PINNING_CONTROLLER_H_
6 #define ASH_WM_SCREEN_PINNING_CONTROLLER_H_
7
8 #include <memory>
9 #include <vector>
10
11 #include "ash/display/window_tree_host_manager.h"
12 #include "base/macros.h"
13
14 namespace ash {
15
16 class WindowTreeHostManager;
17 class WmShellCommon;
18 class WmWindow;
19
20 // Handles pinned state.
21 class ScreenPinningController : public WindowTreeHostManager::Observer {
22 public:
23 ScreenPinningController(WmShellCommon* wm_shell_common,
24 WindowTreeHostManager* window_tree_host_manager);
25 ~ScreenPinningController() override;
26
27 // Sets a pinned window. It is not allowed to call this when there already
28 // is a pinned window.
29 void SetPinnedWindow(WmWindow* pinned_window);
30
31 // Returns true if in pinned mode, otherwise false.
32 bool IsPinned() const;
33
34 // Called when a new window is added to the container which has the pinned
35 // window.
36 void OnWindowAddedToPinnedContainer(WmWindow* new_window);
37
38 // Called when a window will be removed from the container which has the
39 // pinned window.
40 void OnWillRemoveWindowFromPinnedContainer(WmWindow* window);
41
42 // Called when a window stacking is changed in the container which has the
43 // pinned window.
44 void OnPinnedContainerWindowStackingChanged(WmWindow* window);
45
46 // Called when a new window is added to a system modal container.
47 void OnWindowAddedToSystemModalContainer(WmWindow* new_window);
48
49 // Called when a window will be removed from a system modal container.
50 void OnWillRemoveWindowFromSystemModalContainer(WmWindow* window);
51
52 // Called when a window stacking is changed in a system modal container.
53 void OnSystemModalContainerWindowStackingChanged(WmWindow* window);
54
55 // Called when a dim window in the system modal container is destroying.
56 void OnDimWindowDestroying(WmWindow* window);
57
58 private:
59 class PinnedContainerWindowObserver;
60 class PinnedContainerChildWindowObserver;
61 class SystemModalContainerWindowObserver;
62 class SystemModalContainerChildWindowObserver;
63 class DimWindowObserver;
64
65 // Keeps the pinned window on top of the siblings.
66 void KeepPinnedWindowOnTop();
67
68 // Keeps the dim window at bottom of the container.
69 void KeepDimWindowAtBottom(WmWindow* container);
70
71 // WindowTreeHostManager::Observer:
72 void OnDisplayConfigurationChanged() override;
73
74 // Pinned window should be on top in the parent window.
75 WmWindow* pinned_window_ = nullptr;
76
77 // Dim background window just behind of the pinned window.
78 // Not owned. The parent has its ownership.
79 WmWindow* background_window_ = nullptr;
80
81 // In pinned mode, all displays other than the one where pinned_window_ is.
82 // Similar to background_window_, not owned.
83 std::vector<WmWindow*> dim_windows_;
84
85 // Set true only when restacking done by this controller.
86 bool in_restacking_ = false;
87
88 // For OnPinnedStateChanged event notification.
89 // While this controller is alive, it needs to be ensured that the instances
90 // refered from the pointers should be alive.
91 WmShellCommon* wm_shell_common_;
92
93 // Keep references to remove this as a observer.
94 // While this controller is alive, it needs to be ensured that the instances
95 // refered from the pointers should be alive.
96 WindowTreeHostManager* window_tree_host_manager_;
97
98 // Window observers to translate events for the window to this controller.
99 std::unique_ptr<PinnedContainerWindowObserver>
100 pinned_container_window_observer_;
101 std::unique_ptr<PinnedContainerChildWindowObserver>
102 pinned_container_child_window_observer_;
103 std::unique_ptr<SystemModalContainerWindowObserver>
104 system_modal_container_window_observer_;
105 std::unique_ptr<SystemModalContainerChildWindowObserver>
106 system_modal_container_child_window_observer_;
107 std::unique_ptr<DimWindowObserver> dim_window_observer_;
108
109 DISALLOW_COPY_AND_ASSIGN(ScreenPinningController);
110 };
111
112 } // namespace ash
113
114 #endif // ASH_WM_SCREEN_PINNING_CONTROLLER_H_
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