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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 WEBKIT_BROWSER_QUOTA_SPECIAL_STORAGE_POLICY_H_ | |
6 #define WEBKIT_BROWSER_QUOTA_SPECIAL_STORAGE_POLICY_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/memory/ref_counted.h" | |
11 #include "base/observer_list.h" | |
12 #include "webkit/browser/webkit_storage_browser_export.h" | |
13 | |
14 class GURL; | |
15 | |
16 namespace quota { | |
17 | |
18 // Special rights are granted to 'extensions' and 'applications'. The | |
19 // storage subsystems query this interface to determine which origins | |
20 // have these rights. Chrome provides an impl that is cognizant of what | |
21 // is currently installed in the extensions system. | |
22 // The IsSomething() methods must be thread-safe, however Observers should | |
23 // only be notified, added, and removed on the IO thead. | |
24 class WEBKIT_STORAGE_BROWSER_EXPORT SpecialStoragePolicy | |
25 : public base::RefCountedThreadSafe<SpecialStoragePolicy> { | |
26 public: | |
27 typedef int StoragePolicy; | |
28 enum ChangeFlags { | |
29 STORAGE_PROTECTED = 1 << 0, | |
30 STORAGE_UNLIMITED = 1 << 1, | |
31 }; | |
32 | |
33 class WEBKIT_STORAGE_BROWSER_EXPORT Observer { | |
34 public: | |
35 virtual void OnGranted(const GURL& origin, int change_flags) = 0; | |
36 virtual void OnRevoked(const GURL& origin, int change_flags) = 0; | |
37 virtual void OnCleared() = 0; | |
38 | |
39 protected: | |
40 virtual ~Observer(); | |
41 }; | |
42 | |
43 SpecialStoragePolicy(); | |
44 | |
45 // Protected storage is not subject to removal by the browsing data remover. | |
46 virtual bool IsStorageProtected(const GURL& origin) = 0; | |
47 | |
48 // Unlimited storage is not subject to 'quotas'. | |
49 virtual bool IsStorageUnlimited(const GURL& origin) = 0; | |
50 | |
51 // Some origins (e.g. installed apps) have access to the size of the remaining | |
52 // disk capacity. | |
53 virtual bool CanQueryDiskSize(const GURL& origin) = 0; | |
54 | |
55 // Checks if extension identified with |extension_id| is registered as | |
56 // file handler. | |
57 virtual bool IsFileHandler(const std::string& extension_id) = 0; | |
58 | |
59 // Checks if the origin contains per-site isolated storage. | |
60 virtual bool HasIsolatedStorage(const GURL& origin) = 0; | |
61 | |
62 // Some origins are only allowed to store session-only data which is deleted | |
63 // when the session ends. | |
64 virtual bool IsStorageSessionOnly(const GURL& origin) = 0; | |
65 | |
66 // Returns true if some origins are only allowed session-only storage. | |
67 virtual bool HasSessionOnlyOrigins() = 0; | |
68 | |
69 // Adds/removes an observer, the policy does not take | |
70 // ownership of the observer. Should only be called on the IO thread. | |
71 void AddObserver(Observer* observer); | |
72 void RemoveObserver(Observer* observer); | |
73 | |
74 protected: | |
75 friend class base::RefCountedThreadSafe<SpecialStoragePolicy>; | |
76 virtual ~SpecialStoragePolicy(); | |
77 void NotifyGranted(const GURL& origin, int change_flags); | |
78 void NotifyRevoked(const GURL& origin, int change_flags); | |
79 void NotifyCleared(); | |
80 | |
81 ObserverList<Observer> observers_; | |
82 }; | |
83 | |
84 } // namespace quota | |
85 | |
86 #endif // WEBKIT_BROWSER_QUOTA_SPECIAL_STORAGE_POLICY_H_ | |
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