forked from mirrors/gecko-dev
c186d54bb2
- stop inheriting StorageDBBridge in StorageDBThread and StorageDBChild - move StorageDBThread and StorageDBChild initialization out of LocalStorageCache - use IPC even for the intra-process communication in main process - rationalize a bit storage observer code - make StorageDBParent to always be created and destroyed on the background thread
144 lines
4.8 KiB
C++
144 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_dom_StorageManager_h
|
|
#define mozilla_dom_StorageManager_h
|
|
|
|
#include "nsIDOMStorageManager.h"
|
|
#include "StorageObserver.h"
|
|
|
|
#include "LocalStorage.h"
|
|
#include "LocalStorageCache.h"
|
|
#include "mozilla/dom/Storage.h"
|
|
|
|
#include "nsTHashtable.h"
|
|
#include "nsDataHashtable.h"
|
|
#include "nsClassHashtable.h"
|
|
#include "nsHashKeys.h"
|
|
|
|
namespace mozilla {
|
|
|
|
class OriginAttributesPattern;
|
|
|
|
namespace dom {
|
|
|
|
class LocalStorageManager final : public nsIDOMStorageManager
|
|
, public StorageObserverSink
|
|
{
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIDOMSTORAGEMANAGER
|
|
|
|
public:
|
|
LocalStorageManager();
|
|
|
|
// Reads the preference for DOM storage quota
|
|
static uint32_t GetQuota();
|
|
|
|
// Gets (but not ensures) cache for the given scope
|
|
LocalStorageCache* GetCache(const nsACString& aOriginSuffix,
|
|
const nsACString& aOriginNoSuffix);
|
|
|
|
// Returns object keeping usage cache for the scope.
|
|
already_AddRefed<StorageUsage>
|
|
GetOriginUsage(const nsACString& aOriginNoSuffix);
|
|
|
|
static nsCString CreateOrigin(const nsACString& aOriginSuffix,
|
|
const nsACString& aOriginNoSuffix);
|
|
|
|
private:
|
|
~LocalStorageManager();
|
|
|
|
// StorageObserverSink, handler to various chrome clearing notification
|
|
nsresult Observe(const char* aTopic,
|
|
const nsAString& aOriginAttributesPattern,
|
|
const nsACString& aOriginScope) override;
|
|
|
|
// Since nsTHashtable doesn't like multiple inheritance, we have to aggregate
|
|
// LocalStorageCache into the entry.
|
|
class LocalStorageCacheHashKey : public nsCStringHashKey
|
|
{
|
|
public:
|
|
explicit LocalStorageCacheHashKey(const nsACString* aKey)
|
|
: nsCStringHashKey(aKey)
|
|
, mCache(new LocalStorageCache(aKey))
|
|
{}
|
|
|
|
LocalStorageCacheHashKey(const LocalStorageCacheHashKey& aOther)
|
|
: nsCStringHashKey(aOther)
|
|
{
|
|
NS_ERROR("Shouldn't be called");
|
|
}
|
|
|
|
LocalStorageCache* cache() { return mCache; }
|
|
// Keep the cache referenced forever, used for sessionStorage.
|
|
void HardRef() { mCacheRef = mCache; }
|
|
|
|
private:
|
|
// weak ref only since cache references its manager.
|
|
LocalStorageCache* mCache;
|
|
// hard ref when this is sessionStorage to keep it alive forever.
|
|
RefPtr<LocalStorageCache> mCacheRef;
|
|
};
|
|
|
|
// Ensures cache for a scope, when it doesn't exist it is created and
|
|
// initalized, this also starts preload of persistent data.
|
|
already_AddRefed<LocalStorageCache> PutCache(const nsACString& aOriginSuffix,
|
|
const nsACString& aOriginNoSuffix,
|
|
nsIPrincipal* aPrincipal);
|
|
|
|
enum class CreateMode {
|
|
// GetStorage: do not create if it's not already in memory.
|
|
UseIfExistsNeverCreate,
|
|
// CreateStorage: Create it if it's not already in memory.
|
|
CreateAlways,
|
|
// PrecacheStorage: Create only if the database says we ShouldPreloadOrigin.
|
|
CreateIfShouldPreload
|
|
};
|
|
|
|
// Helper for creation of DOM storage objects
|
|
nsresult GetStorageInternal(CreateMode aCreate,
|
|
mozIDOMWindow* aWindow,
|
|
nsIPrincipal* aPrincipal,
|
|
const nsAString& aDocumentURI,
|
|
bool aPrivate,
|
|
nsIDOMStorage** aRetval);
|
|
|
|
// Suffix->origin->cache map
|
|
typedef nsTHashtable<LocalStorageCacheHashKey> CacheOriginHashtable;
|
|
nsClassHashtable<nsCStringHashKey, CacheOriginHashtable> mCaches;
|
|
|
|
// If mLowDiskSpace is true it indicates a low device storage situation and
|
|
// so no localStorage writes are allowed. sessionStorage writes are still
|
|
// allowed.
|
|
bool mLowDiskSpace;
|
|
bool IsLowDiskSpace() const { return mLowDiskSpace; };
|
|
|
|
void ClearCaches(uint32_t aUnloadFlags,
|
|
const OriginAttributesPattern& aPattern,
|
|
const nsACString& aKeyPrefix);
|
|
|
|
// Global getter of localStorage manager service
|
|
static LocalStorageManager* Self() { return sSelf; }
|
|
|
|
// Like Self, but creates an instance if we're not yet initialized.
|
|
static LocalStorageManager* Ensure();
|
|
|
|
private:
|
|
// Keeps usage cache objects for eTLD+1 scopes we have touched.
|
|
nsDataHashtable<nsCStringHashKey, RefPtr<StorageUsage> > mUsages;
|
|
|
|
friend class LocalStorageCache;
|
|
friend class StorageDBChild;
|
|
// Releases cache since it is no longer referrered by any Storage object.
|
|
virtual void DropCache(LocalStorageCache* aCache);
|
|
|
|
static LocalStorageManager* sSelf;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_StorageManager_h
|