content/browser/dom_storage/dom_storage_context_wrapper.h

   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 CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_CONTEXT_WRAPPER_H_
   6 #define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_CONTEXT_WRAPPER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "content/common/content_export.h"
  10 #include "content/public/browser/dom_storage_context.h"
  11
  12 namespace base {
  13 class FilePath;
  14 }
  15
  16 namespace quota {
  17 class SpecialStoragePolicy;
  18 }
  19
  20 namespace content {
  21
  22 class DOMStorageContextImpl;
  23
  24 // This is owned by BrowserContext (aka Profile) and encapsulates all
  25 // per-profile dom storage state.
  26 class CONTENT_EXPORT DOMStorageContextWrapper :
  27     NON_EXPORTED_BASE(public DOMStorageContext),
  28     public base::RefCountedThreadSafe<DOMStorageContextWrapper> {
  29  public:
  30   // If |data_path| is empty, nothing will be saved to disk.
  31   DOMStorageContextWrapper(const base::FilePath& data_path,
  32                         quota::SpecialStoragePolicy* special_storage_policy);
  33
  34   // DOMStorageContext implementation.
  35   virtual void GetLocalStorageUsage(
  36       const GetLocalStorageUsageCallback& callback) OVERRIDE;
  37   virtual void GetSessionStorageUsage(
  38       const GetSessionStorageUsageCallback& callback) OVERRIDE;
  39   virtual void DeleteLocalStorage(const GURL& origin) OVERRIDE;
  40   virtual void DeleteSessionStorage(
  41       const SessionStorageUsageInfo& usage_info) OVERRIDE;
  42   virtual void SetSaveSessionStorageOnDisk() OVERRIDE;
  43   virtual scoped_refptr<SessionStorageNamespace>
  44       RecreateSessionStorage(const std::string& persistent_id) OVERRIDE;
  45   virtual void StartScavengingUnusedSessionStorage() OVERRIDE;
  46
  47   // Called to free up memory that's not strictly needed.
  48   void PurgeMemory();
  49
  50   // Used by content settings to alter the behavior around
  51   // what data to keep and what data to discard at shutdown.
  52   // The policy is not so straight forward to describe, see
  53   // the implementation for details.
  54   void SetForceKeepSessionState();
  55
  56   // Called when the BrowserContext/Profile is going away.
  57   void Shutdown();
  58
  59  private:
  60   friend class DOMStorageMessageFilter;  // for access to context()
  61   friend class SessionStorageNamespaceImpl;  // ditto
  62   friend class base::RefCountedThreadSafe<DOMStorageContextWrapper>;
  63
  64   virtual ~DOMStorageContextWrapper();
  65   DOMStorageContextImpl* context() const { return context_.get(); }
  66
  67   scoped_refptr<DOMStorageContextImpl> context_;
  68
  69   DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageContextWrapper);
  70 };
  71
  72 }  // namespace content
  73
  74 #endif  // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_CONTEXT_WRAPPER_H_