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 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_ 6 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_ 7 8 #include "base/callback_forward.h" 9 #include "base/containers/hash_tables.h" 10 #include "base/memory/scoped_ptr.h" 11 #include "base/supports_user_data.h" 12 #include "content/common/content_export.h" 13 14 class GURL; 15 16 namespace base { 17 class FilePath; 18 } 19 20 namespace fileapi { 21 class ExternalMountPoints; 22 } 23 24 namespace net { 25 class URLRequestContextGetter; 26 } 27 28 namespace quota { 29 class SpecialStoragePolicy; 30 } 31 32 namespace content { 33 34 class DownloadManager; 35 class DownloadManagerDelegate; 36 class GeolocationPermissionContext; 37 class IndexedDBContext; 38 class ResourceContext; 39 class SiteInstance; 40 class StoragePartition; 41 42 // This class holds the context needed for a browsing session. 43 // It lives on the UI thread. All these methods must only be called on the UI 44 // thread. 45 class CONTENT_EXPORT BrowserContext : public base::SupportsUserData { 46 public: 47 static DownloadManager* GetDownloadManager(BrowserContext* browser_context); 48 49 // Returns BrowserContext specific external mount points. It may return NULL 50 // if the context doesn't have any BrowserContext specific external mount 51 // points. Currenty, non-NULL value is returned only on ChromeOS. 52 static fileapi::ExternalMountPoints* GetMountPoints(BrowserContext* context); 53 54 static content::StoragePartition* GetStoragePartition( 55 BrowserContext* browser_context, SiteInstance* site_instance); 56 static content::StoragePartition* GetStoragePartitionForSite( 57 BrowserContext* browser_context, const GURL& site); 58 typedef base::Callback<void(StoragePartition*)> StoragePartitionCallback; 59 static void ForEachStoragePartition( 60 BrowserContext* browser_context, 61 const StoragePartitionCallback& callback); 62 static void AsyncObliterateStoragePartition( 63 BrowserContext* browser_context, 64 const GURL& site, 65 const base::Closure& on_gc_required); 66 67 // This function clears the contents of |active_paths| but does not take 68 // ownership of the pointer. 69 static void GarbageCollectStoragePartitions( 70 BrowserContext* browser_context, 71 scoped_ptr<base::hash_set<base::FilePath> > active_paths, 72 const base::Closure& done); 73 74 // DON'T USE THIS. GetDefaultStoragePartition() is going away. 75 // Use GetStoragePartition() instead. Ask ajwong@ if you have problems. 76 static content::StoragePartition* GetDefaultStoragePartition( 77 BrowserContext* browser_context); 78 79 // Ensures that the corresponding ResourceContext is initialized. Normally the 80 // BrowserContext initializs the corresponding getters when its objects are 81 // created, but if the embedder wants to pass the ResourceContext to another 82 // thread before they use BrowserContext, they should call this to make sure 83 // that the ResourceContext is ready. 84 static void EnsureResourceContextInitialized(BrowserContext* browser_context); 85 86 // Tells the HTML5 objects on this context to persist their session state 87 // across the next restart. 88 static void SaveSessionState(BrowserContext* browser_context); 89 90 // Tells the HTML5 objects on this context to purge any uneeded memory. 91 static void PurgeMemory(BrowserContext* browser_context); 92 93 virtual ~BrowserContext(); 94 95 // Returns the path of the directory where this context's data is stored. 96 virtual base::FilePath GetPath() const = 0; 97 98 // Return whether this context is incognito. Default is false. 99 virtual bool IsOffTheRecord() const = 0; 100 101 // Returns the request context information associated with this context. Call 102 // this only on the UI thread, since it can send notifications that should 103 // happen on the UI thread. 104 // TODO(creis): Remove this version in favor of the one below. 105 virtual net::URLRequestContextGetter* GetRequestContext() = 0; 106 107 // Returns the request context appropriate for the given renderer. If the 108 // renderer process doesn't have an associated installed app, or if the 109 // installed app doesn't have isolated storage, this is equivalent to calling 110 // GetRequestContext(). 111 virtual net::URLRequestContextGetter* GetRequestContextForRenderProcess( 112 int renderer_child_id) = 0; 113 114 // Returns the default request context for media resources associated with 115 // this context. 116 // TODO(creis): Remove this version in favor of the one below. 117 virtual net::URLRequestContextGetter* GetMediaRequestContext() = 0; 118 119 // Returns the request context for media resources associated with this 120 // context and renderer process. 121 virtual net::URLRequestContextGetter* GetMediaRequestContextForRenderProcess( 122 int renderer_child_id) = 0; 123 virtual net::URLRequestContextGetter* 124 GetMediaRequestContextForStoragePartition( 125 const base::FilePath& partition_path, 126 bool in_memory) = 0; 127 128 typedef base::Callback<void(bool)> MIDISysExPermissionCallback; 129 130 // Requests a permission to use system exclusive messages in MIDI events. 131 // |callback| will be invoked when the request is resolved. 132 virtual void RequestMIDISysExPermission( 133 int render_process_id, 134 int render_view_id, 135 const GURL& requesting_frame, 136 const MIDISysExPermissionCallback& callback) = 0; 137 138 // Returns the resource context. 139 virtual ResourceContext* GetResourceContext() = 0; 140 141 // Returns the DownloadManagerDelegate for this context. This will be called 142 // once per context. The embedder owns the delegate and is responsible for 143 // ensuring that it outlives DownloadManager. It's valid to return NULL. 144 virtual DownloadManagerDelegate* GetDownloadManagerDelegate() = 0; 145 146 // Returns the geolocation permission context for this context. It's valid to 147 // return NULL, in which case geolocation requests will always be allowed. 148 virtual GeolocationPermissionContext* GetGeolocationPermissionContext() = 0; 149 150 // Returns a special storage policy implementation, or NULL. 151 virtual quota::SpecialStoragePolicy* GetSpecialStoragePolicy() = 0; 152 }; 153 154 } // namespace content 155 156 #if defined(COMPILER_GCC) 157 namespace BASE_HASH_NAMESPACE { 158 159 template<> 160 struct hash<content::BrowserContext*> { 161 std::size_t operator()(content::BrowserContext* const& p) const { 162 return reinterpret_cast<std::size_t>(p); 163 } 164 }; 165 166 } // namespace BASE_HASH_NAMESPACE 167 #endif 168 169 #endif // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_ 170