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.
5 #ifndef EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
6 #define EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
10 #include "base/memory/ref_counted.h"
11 #include "components/keyed_service/core/keyed_service.h"
12 #include "extensions/common/extension.h"
14 class ExtensionService;
16 #if defined(OS_CHROMEOS)
18 class DeviceLocalAccountManagementPolicyProvider;
20 #endif // defined(OS_CHROMEOS)
26 namespace extensions {
29 class ContentVerifier;
33 class ExtensionWarningService;
35 class InstallVerifier;
36 class LazyBackgroundTaskQueue;
37 class ManagementPolicy;
43 class UserScriptMaster;
45 // ExtensionSystem manages the lifetime of many of the services used by the
46 // extensions and apps system, and it handles startup and shutdown as needed.
47 // Eventually, we'd like to make more of these services into KeyedServices in
49 class ExtensionSystem : public KeyedService {
52 virtual ~ExtensionSystem();
54 // Returns the instance for the given browser context, or NULL if none.
55 static ExtensionSystem* Get(content::BrowserContext* context);
57 // Initializes extensions machinery.
58 // Component extensions are always enabled, external and user extensions are
59 // controlled by |extensions_enabled|.
60 virtual void InitForRegularProfile(bool extensions_enabled) = 0;
62 // The ExtensionService is created at startup.
63 virtual ExtensionService* extension_service() = 0;
65 // Per-extension data that can change during the life of the process but
66 // does not persist across restarts. Lives on UI thread. Created at startup.
67 virtual RuntimeData* runtime_data() = 0;
69 // The class controlling whether users are permitted to perform certain
70 // actions on extensions (install, uninstall, disable, etc.).
71 // The ManagementPolicy is created at startup.
72 virtual ManagementPolicy* management_policy() = 0;
74 // The UserScriptMaster is created at startup.
75 virtual UserScriptMaster* user_script_master() = 0;
77 // The ProcessManager is created at startup.
78 virtual ProcessManager* process_manager() = 0;
80 // The StateStore is created at startup.
81 virtual StateStore* state_store() = 0;
83 // The rules store is created at startup.
84 virtual StateStore* rules_store() = 0;
86 // Returns the IO-thread-accessible extension data.
87 virtual InfoMap* info_map() = 0;
89 // The LazyBackgroundTaskQueue is created at startup.
90 virtual LazyBackgroundTaskQueue* lazy_background_task_queue() = 0;
92 // The EventRouter is created at startup.
93 virtual EventRouter* event_router() = 0;
95 // The ExtensionWarningService is created at startup.
96 virtual ExtensionWarningService* warning_service() = 0;
98 // The blacklist is created at startup.
99 virtual Blacklist* blacklist() = 0;
101 // The ErrorConsole is created at startup.
102 virtual ErrorConsole* error_console() = 0;
104 // The InstallVerifier is created at startup.
105 virtual InstallVerifier* install_verifier() = 0;
107 // Returns the QuotaService that limits calls to certain extension functions.
108 // Lives on the UI thread. Created at startup.
109 virtual QuotaService* quota_service() = 0;
111 // Called by the ExtensionService that lives in this system. Gives the
112 // info map a chance to react to the load event before the EXTENSION_LOADED
113 // notification has fired. The purpose for handling this event first is to
114 // avoid race conditions by making sure URLRequestContexts learn about new
115 // extensions before anything else needs them to know.
116 virtual void RegisterExtensionWithRequestContexts(
117 const Extension* extension) {}
119 // Called by the ExtensionService that lives in this system. Lets the
120 // info map clean up its RequestContexts once all the listeners to the
121 // EXTENSION_UNLOADED notification have finished running.
122 virtual void UnregisterExtensionWithRequestContexts(
123 const std::string& extension_id,
124 const UnloadedExtensionInfo::Reason reason) {}
126 // Signaled when the extension system has completed its startup tasks.
127 virtual const OneShotEvent& ready() const = 0;
129 // Returns the content verifier, if any.
130 virtual ContentVerifier* content_verifier() = 0;
133 } // namespace extensions
135 #endif // EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_