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Side by Side Diff: ash/shelf/shelf_window_watcher.h

Issue 2211463002: mash: Move ShelfWindowWatcher[ItemDelegate] to ash/common. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Add TODO comments with bug for WmWindowMus ShelfItemDetails support. Created 4 years, 4 months ago
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1 // Copyright 2013 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_SHELF_SHELF_WINDOW_WATCHER_H_
6 #define ASH_SHELF_SHELF_WINDOW_WATCHER_H_
7
8 #include "ash/common/wm_activation_observer.h"
9 #include "ash/common/wm_window_observer.h"
10 #include "base/macros.h"
11 #include "base/scoped_observer.h"
12 #include "ui/display/display_observer.h"
13
14 namespace ash {
15
16 class ShelfModel;
17 class WmWindow;
18
19 // ShelfWindowWatcher creates and handles a ShelfItem for windows in the default
20 // container that have a ShelfItemDetails property (e.g. the task manager
21 // dialog or the OS settings window). It adds the ShelfItem when the window is
22 // added to the default container and maintains it until the window is closed,
23 // even if the window is transiently reparented (e.g. during a drag).
24 class ShelfWindowWatcher : public WmActivationObserver,
25 public display::DisplayObserver {
26 public:
27 explicit ShelfWindowWatcher(ShelfModel* model);
28 ~ShelfWindowWatcher() override;
29
30 private:
31 // Observes for windows being added to a root window's default container.
32 class ContainerWindowObserver : public WmWindowObserver {
33 public:
34 explicit ContainerWindowObserver(ShelfWindowWatcher* window_watcher);
35 ~ContainerWindowObserver() override;
36
37 private:
38 // WmWindowObserver:
39 void OnWindowTreeChanged(WmWindow* window,
40 const TreeChangeParams& params) override;
41 void OnWindowDestroying(WmWindow* window) override;
42
43 ShelfWindowWatcher* window_watcher_;
44
45 DISALLOW_COPY_AND_ASSIGN(ContainerWindowObserver);
46 };
47
48 // Observes individual user windows to detect when they are closed or when
49 // they have ShelfItemDetails changed.
50 class UserWindowObserver : public WmWindowObserver {
51 public:
52 explicit UserWindowObserver(ShelfWindowWatcher* window_watcher);
53 ~UserWindowObserver() override;
54
55 private:
56 // WmWindowObserver:
57 void OnWindowPropertyChanged(WmWindow* window,
58 WmWindowProperty property) override;
59 void OnWindowDestroying(WmWindow* window) override;
60
61 ShelfWindowWatcher* window_watcher_;
62
63 DISALLOW_COPY_AND_ASSIGN(UserWindowObserver);
64 };
65
66 // Creates a ShelfItem for |window| that has ShelfItemDetails.
67 void AddShelfItem(WmWindow* window);
68
69 // Removes a ShelfItem for |window|.
70 void RemoveShelfItem(WmWindow* window);
71
72 // Updates the status of ShelfItem for |window|.
73 void UpdateShelfItemStatus(WmWindow* window, bool is_active);
74
75 // Returns the index of ShelfItem associated with |window|.
76 int GetShelfItemIndexForWindow(WmWindow* window) const;
77
78 // Cleans up observers on |container|.
79 void OnContainerWindowDestroying(WmWindow* container);
80
81 // Adds a shelf item for new windows added to the default container that have
82 // a ShelfItemDetails property.
83 void OnUserWindowAdded(WmWindow* window);
84
85 // Adds, updates or removes the shelf item based on a property change.
86 void OnUserWindowShelfItemDetailsChanged(WmWindow* window);
87
88 // Removes the shelf item when a window closes.
89 void OnUserWindowDestroying(WmWindow* window);
90
91 // WmActivationObserver:
92 void OnWindowActivated(WmWindow* gained_active,
93 WmWindow* lost_active) override;
94
95 // display::DisplayObserver overrides:
96 void OnDisplayAdded(const display::Display& display) override;
97 void OnDisplayRemoved(const display::Display& old_display) override;
98 void OnDisplayMetricsChanged(const display::Display& display,
99 uint32_t metrics) override;
100
101 ShelfModel* model_;
102
103 ContainerWindowObserver container_window_observer_;
104 UserWindowObserver user_window_observer_;
105
106 ScopedObserver<WmWindow, ContainerWindowObserver> observed_container_windows_;
107 ScopedObserver<WmWindow, UserWindowObserver> observed_user_windows_;
108
109 DISALLOW_COPY_AND_ASSIGN(ShelfWindowWatcher);
110 };
111
112 } // namespace ash
113
114 #endif // ASH_SHELF_SHELF_WINDOW_WATCHER_H_
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