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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 ATHENA_CONTENT_APP_ACTIVITY_REGISTRY_H_ | |
6 #define ATHENA_CONTENT_APP_ACTIVITY_REGISTRY_H_ | |
7 | |
8 #include <vector> | |
9 | |
10 #include "athena/activity/public/activity_view_model.h" | |
11 #include "athena/content/app_activity_proxy.h" | |
12 #include "ui/gfx/image/image_skia.h" | |
13 | |
14 namespace aura { | |
15 class Window; | |
16 } | |
17 | |
18 namespace content { | |
19 class BrowserContext; | |
20 } | |
21 | |
22 namespace athena { | |
23 | |
24 class AppActivity; | |
25 | |
26 // This class keeps track of all existing |AppActivity|s and shuts down all of | |
27 // them when the application gets unloaded to save memory. It will then replace | |
28 // the |AppActivity| in the Activity list as proxy to allow restarting of the | |
29 // application. | |
30 class ATHENA_EXPORT AppActivityRegistry { | |
31 public: | |
32 AppActivityRegistry(const std::string& app_id, | |
33 content::BrowserContext* browser_context); | |
34 ~AppActivityRegistry(); | |
35 | |
36 // Register an |AppActivity| with this application. | |
37 void RegisterAppActivity(AppActivity* app_activity); | |
38 | |
39 // Unregister a previously attached |AppActivity|. | |
40 // Note that detaching the last |AppActivity| will delete this object - unless | |
41 // the resource manager was trying to unload the application. | |
42 // Note furthermore that Detach can be called without ever being registered. | |
43 void UnregisterAppActivity(AppActivity* app_activity); | |
44 | |
45 // Returns the number of activities/windows with this application. | |
46 int NumberOfActivities() const { return activity_list_.size(); } | |
47 | |
48 // Returns the |AppActivity| at |index|. It will return nullptr if an invalid | |
49 // index was specified. | |
50 AppActivity* GetAppActivityAt(size_t index); | |
51 | |
52 // Unload all application associated activities to save resources. | |
53 void Unload(); | |
54 | |
55 // Returns true if the application is in the unloaded state. | |
56 bool IsUnloaded() { return unloaded_activity_proxy_ != nullptr; } | |
57 | |
58 content::BrowserContext* browser_context() const { return browser_context_; } | |
59 const std::string& app_id() const { return app_id_; } | |
60 | |
61 // Returns the proxy - if there is one. This will get used by a newly created | |
62 // activity to position itself in its place before it get destroyed. | |
63 Activity* unloaded_activity_proxy() { return unloaded_activity_proxy_; } | |
64 | |
65 protected: | |
66 friend AppActivityProxy; | |
67 | |
68 // When the |AppActivityProxy| gets destroyed it should call this function | |
69 // to disconnect from this object. This call might destroy |this|. | |
70 void ProxyDestroyed(AppActivityProxy* proxy); | |
71 | |
72 // When called by the |AppActivityProxy| to restart the application, it can | |
73 // cause the application to restart. When that happens the proxy will get | |
74 // destroyed. After this call |this| might be destroyed. | |
75 void RestartApplication(AppActivityProxy* proxy); | |
76 | |
77 private: | |
78 // Called if an unload of an application should take place asynchronously to | |
79 // avoid object destruction within an observer handler. | |
80 void DelayedUnload(); | |
81 | |
82 // Gets most recently used AppAcitivty that belongs to the same application. | |
83 AppActivity* GetMruActivity(); | |
84 | |
85 // A list of all activities associated with this application. | |
86 std::vector<AppActivity*> activity_list_; | |
87 | |
88 // The application id for this proxy. | |
89 std::string app_id_; | |
90 | |
91 // The browser context of the user. | |
92 content::BrowserContext* browser_context_; | |
93 | |
94 // When the activity is unloaded this is the AppActivityProxy. The object is | |
95 // owned the the ActivityManager. | |
96 AppActivityProxy* unloaded_activity_proxy_; | |
97 | |
98 // The presentation values. | |
99 SkColor color_; | |
100 base::string16 title_; | |
101 gfx::ImageSkia image_; | |
102 | |
103 DISALLOW_COPY_AND_ASSIGN(AppActivityRegistry); | |
104 }; | |
105 | |
106 } // namespace athena | |
107 | |
108 #endif // ATHENA_CONTENT_APP_ACTIVITY_REGISTRY_H_ | |
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