OLD | NEW |
1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_H_ | 5 #ifndef EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_H_ |
6 #define EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_H_ | 6 #define EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <map> | 10 #include <map> |
11 #include <string> | 11 #include <string> |
12 | 12 |
13 #include "base/callback_forward.h" | 13 #include "base/callback_forward.h" |
14 #include "base/compiler_specific.h" | 14 #include "base/compiler_specific.h" |
15 #include "base/gtest_prod_util.h" | 15 #include "base/gtest_prod_util.h" |
16 #include "base/scoped_observer.h" | 16 #include "base/scoped_observer.h" |
17 #include "components/keyed_service/core/keyed_service.h" | 17 #include "components/keyed_service/core/keyed_service.h" |
18 #include "content/public/browser/notification_observer.h" | 18 #include "content/public/browser/notification_observer.h" |
19 #include "content/public/browser/notification_registrar.h" | 19 #include "content/public/browser/notification_registrar.h" |
20 #include "extensions/browser/extension_registry_observer.h" | 20 #include "extensions/browser/extension_registry_observer.h" |
| 21 #include "extensions/browser/lazy_context_task_queue.h" |
21 #include "extensions/common/extension_id.h" | 22 #include "extensions/common/extension_id.h" |
22 | 23 |
23 namespace content { | 24 namespace content { |
24 class BrowserContext; | 25 class BrowserContext; |
25 } | 26 } |
26 | 27 |
27 namespace extensions { | 28 namespace extensions { |
28 class Extension; | 29 class Extension; |
29 class ExtensionHost; | 30 class ExtensionHost; |
30 class ExtensionRegistry; | 31 class ExtensionRegistry; |
| 32 class LazyContextId; |
31 | 33 |
32 // This class maintains a queue of tasks that should execute when an | 34 // This class maintains a queue of tasks that should execute when an |
33 // extension's lazy background page is loaded. It is also in charge of loading | 35 // extension's lazy background page is loaded. It is also in charge of loading |
34 // the page when the first task is queued. | 36 // the page when the first task is queued. |
35 // | 37 // |
36 // It is the consumer's responsibility to use this class when appropriate, i.e. | 38 // It is the consumer's responsibility to use this class when appropriate, i.e. |
37 // only with extensions that have not-yet-loaded lazy background pages. | 39 // only with extensions that have not-yet-loaded lazy background pages. |
38 class LazyBackgroundTaskQueue : public KeyedService, | 40 class LazyBackgroundTaskQueue : public KeyedService, |
| 41 public LazyContextTaskQueue, |
39 public content::NotificationObserver, | 42 public content::NotificationObserver, |
40 public ExtensionRegistryObserver { | 43 public ExtensionRegistryObserver { |
41 public: | 44 public: |
42 typedef base::Callback<void(ExtensionHost*)> PendingTask; | 45 typedef base::Callback<void(ExtensionHost*)> PendingTask; |
43 | 46 |
44 explicit LazyBackgroundTaskQueue(content::BrowserContext* browser_context); | 47 explicit LazyBackgroundTaskQueue(content::BrowserContext* browser_context); |
45 ~LazyBackgroundTaskQueue() override; | 48 ~LazyBackgroundTaskQueue() override; |
46 | 49 |
47 // Convenience method to return the LazyBackgroundTaskQueue for a given | 50 // Convenience method to return the LazyBackgroundTaskQueue for a given |
48 // |context|. | 51 // |context|. |
49 static LazyBackgroundTaskQueue* Get(content::BrowserContext* context); | 52 static LazyBackgroundTaskQueue* Get(content::BrowserContext* context); |
50 | 53 |
51 // Returns true if the task should be added to the queue (that is, if the | 54 // Returns true if the task should be added to the queue (that is, if the |
52 // extension has a lazy background page that isn't ready yet). If the | 55 // extension has a lazy background page that isn't ready yet). If the |
53 // extension has a lazy background page that is being suspended this method | 56 // extension has a lazy background page that is being suspended this method |
54 // cancels that suspension. | 57 // cancels that suspension. |
55 bool ShouldEnqueueTask(content::BrowserContext* context, | 58 bool ShouldEnqueueTask(content::BrowserContext* context, |
56 const Extension* extension); | 59 const Extension* extension) override; |
| 60 // TODO(lazyboy): Find a better way to use AddPendingTask instead of this. |
| 61 // Currently AddPendingTask has lots of consumers that depend on |
| 62 // ExtensionHost. |
| 63 void AddPendingTaskToDispatchEvent( |
| 64 LazyContextId* context_id, |
| 65 const LazyContextTaskQueue::PendingTask& task) override; |
57 | 66 |
58 // Adds a task to the queue for a given extension. If this is the first | 67 // Adds a task to the queue for a given extension. If this is the first |
59 // task added for the extension, its lazy background page will be loaded. | 68 // task added for the extension, its lazy background page will be loaded. |
60 // The task will be called either when the page is loaded, or when the | 69 // The task will be called either when the page is loaded, or when the |
61 // page fails to load for some reason (e.g. a crash or browser | 70 // page fails to load for some reason (e.g. a crash or browser |
62 // shutdown). In the latter case, the ExtensionHost parameter is NULL. | 71 // shutdown). In the latter case, the ExtensionHost parameter is NULL. |
63 void AddPendingTask( | 72 void AddPendingTask( |
64 content::BrowserContext* context, | 73 content::BrowserContext* context, |
65 const std::string& extension_id, | 74 const std::string& extension_id, |
66 const PendingTask& task); | 75 const PendingTask& task); |
(...skipping 30 matching lines...) Expand all Loading... |
97 content::NotificationRegistrar registrar_; | 106 content::NotificationRegistrar registrar_; |
98 PendingTasksMap pending_tasks_; | 107 PendingTasksMap pending_tasks_; |
99 | 108 |
100 ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver> | 109 ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver> |
101 extension_registry_observer_; | 110 extension_registry_observer_; |
102 }; | 111 }; |
103 | 112 |
104 } // namespace extensions | 113 } // namespace extensions |
105 | 114 |
106 #endif // EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_H_ | 115 #endif // EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_H_ |
OLD | NEW |