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Side by Side Diff: chrome/browser/extensions/extension_event_router.h

Issue 10025007: Convert tabs, windows, and extension APIs to feature system. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: blah Created 8 years, 8 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_ 5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_
6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_ 6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_
7 #pragma once 7 #pragma once
8 8
9 #include <map> 9 #include <map>
10 #include <set> 10 #include <set>
11 #include <string> 11 #include <string>
12 12
13 #include "base/compiler_specific.h" 13 #include "base/compiler_specific.h"
14 #include "base/memory/linked_ptr.h" 14 #include "base/memory/linked_ptr.h"
15 #include "base/memory/ref_counted.h" 15 #include "base/memory/ref_counted.h"
16 #include "content/public/browser/notification_observer.h" 16 #include "content/public/browser/notification_observer.h"
17 #include "content/public/browser/notification_registrar.h" 17 #include "content/public/browser/notification_registrar.h"
18 #include "chrome/common/extensions/feature.h"
18 #include "ipc/ipc_message.h" 19 #include "ipc/ipc_message.h"
19 20
20 class GURL; 21 class GURL;
21 class Extension; 22 class Extension;
22 class ExtensionHost; 23 class ExtensionHost;
23 class ExtensionDevToolsManager; 24 class ExtensionDevToolsManager;
24 class Profile; 25 class Profile;
25 26
27 using extensions::Feature;
28
26 namespace content { 29 namespace content {
27 class RenderProcessHost; 30 class RenderProcessHost;
28 } 31 }
29 32
30 class ExtensionEventRouter : public content::NotificationObserver { 33 class ExtensionEventRouter : public content::NotificationObserver {
31 public: 34 public:
32 // These constants convey the state of our knowledge of whether we're in 35 // These constants convey the state of our knowledge of whether we're in
33 // a user-caused gesture as part of DispatchEvent. 36 // a user-caused gesture as part of DispatchEvent.
34 enum UserGestureState { 37 enum UserGestureState {
35 USER_GESTURE_UNKNOWN = 0, 38 USER_GESTURE_UNKNOWN = 0,
(...skipping 11 matching lines...) Expand all
47 UserGestureState user_gesture); 50 UserGestureState user_gesture);
48 51
49 explicit ExtensionEventRouter(Profile* profile); 52 explicit ExtensionEventRouter(Profile* profile);
50 virtual ~ExtensionEventRouter(); 53 virtual ~ExtensionEventRouter();
51 54
52 // Add or remove the process/extension pair as a listener for |event_name|. 55 // Add or remove the process/extension pair as a listener for |event_name|.
53 // Note that multiple extensions can share a process due to process 56 // Note that multiple extensions can share a process due to process
54 // collapsing. Also, a single extension can have 2 processes if it is a split 57 // collapsing. Also, a single extension can have 2 processes if it is a split
55 // mode extension. 58 // mode extension.
56 void AddEventListener(const std::string& event_name, 59 void AddEventListener(const std::string& event_name,
60 const std::string& extension_id,
57 content::RenderProcessHost* process, 61 content::RenderProcessHost* process,
58 const std::string& extension_id); 62 Feature::Context context);
59 void RemoveEventListener(const std::string& event_name, 63 void RemoveEventListener(const std::string& event_name,
60 content::RenderProcessHost* process, 64 content::RenderProcessHost* process,
61 const std::string& extension_id); 65 const std::string& extension_id);
62 66
63 // Add or remove the extension as having a lazy background page that listens 67 // Add or remove the extension as having a lazy background page that listens
64 // to the event. The difference from the above methods is that these will be 68 // to the event. The difference from the above methods is that these will be
65 // remembered even after the process goes away. We use this list to decide 69 // remembered even after the process goes away. We use this list to decide
66 // which extension pages to load when dispatching an event. 70 // which extension pages to load when dispatching an event.
67 void AddLazyEventListener(const std::string& event_name, 71 void AddLazyEventListener(const std::string& event_name,
72 const std::string& extension_id,
73 content::RenderProcessHost* process,
74 Feature::Context context);
75 // Use this overload when subscribing extensions to events from C++, or when
76 // access checking the calling process and context is not required.
77 void AddLazyEventListener(const std::string& event_name,
68 const std::string& extension_id); 78 const std::string& extension_id);
69 void RemoveLazyEventListener(const std::string& event_name, 79 void RemoveLazyEventListener(const std::string& event_name,
70 const std::string& extension_id); 80 const std::string& extension_id);
71 81
72 // Returns true if there is at least one listener for the given event. 82 // Returns true if there is at least one listener for the given event.
73 bool HasEventListener(const std::string& event_name); 83 bool HasEventListener(const std::string& event_name);
74 84
75 // Returns true if the extension is listening to the given event. 85 // Returns true if the extension is listening to the given event.
76 bool ExtensionHasEventListener(const std::string& extension_id, 86 bool ExtensionHasEventListener(const std::string& extension_id,
77 const std::string& event_name); 87 const std::string& event_name);
(...skipping 46 matching lines...) Expand 10 before | Expand all | Expand 10 after
124 void OnExtensionEventAck(Profile* profile, const std::string& extension_id); 134 void OnExtensionEventAck(Profile* profile, const std::string& extension_id);
125 135
126 private: 136 private:
127 // The details of an event to be dispatched. 137 // The details of an event to be dispatched.
128 struct ExtensionEvent; 138 struct ExtensionEvent;
129 139
130 // The extension and process that contains the event listener for a given 140 // The extension and process that contains the event listener for a given
131 // event. 141 // event.
132 struct ListenerProcess; 142 struct ListenerProcess;
133 143
144 // Helper that returns whether the event is accessible to the calling context.
145 bool IsEventAvailable(const std::string& event_name,
146 const std::string& extension_id,
147 content::RenderProcessHost* render_process,
148 Feature::Context context_type) const;
149
134 // A map between an event name and a set of extensions that are listening 150 // A map between an event name and a set of extensions that are listening
135 // to that event. 151 // to that event.
136 typedef std::map<std::string, std::set<ListenerProcess> > ListenerMap; 152 typedef std::map<std::string, std::set<ListenerProcess> > ListenerMap;
137 153
138 virtual void Observe(int type, 154 virtual void Observe(int type,
139 const content::NotificationSource& source, 155 const content::NotificationSource& source,
140 const content::NotificationDetails& details) OVERRIDE; 156 const content::NotificationDetails& details) OVERRIDE;
141 157
142 // Returns true if the given listener map contains a event listeners for 158 // Returns true if the given listener map contains a event listeners for
143 // the given event. If |extension_id| is non-empty, we also check that that 159 // the given event. If |extension_id| is non-empty, we also check that that
(...skipping 56 matching lines...) Expand 10 before | Expand all | Expand 10 after
200 216
201 // The list of all the lazy (non-persistent) background pages that are 217 // The list of all the lazy (non-persistent) background pages that are
202 // listening to events. This is just a cache of the real list, which is 218 // listening to events. This is just a cache of the real list, which is
203 // stored on disk in the extension prefs. 219 // stored on disk in the extension prefs.
204 ListenerMap lazy_listeners_; 220 ListenerMap lazy_listeners_;
205 221
206 DISALLOW_COPY_AND_ASSIGN(ExtensionEventRouter); 222 DISALLOW_COPY_AND_ASSIGN(ExtensionEventRouter);
207 }; 223 };
208 224
209 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_ 225 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_
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