pjs/dom/indexedDB/IDBCursor.h

196 строки
5.4 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef mozilla_dom_indexeddb_idbcursor_h__
#define mozilla_dom_indexeddb_idbcursor_h__
#include "mozilla/dom/indexedDB/IndexedDatabase.h"
#include "mozilla/dom/indexedDB/IDBObjectStore.h"
#include "mozilla/dom/indexedDB/Key.h"
#include "nsIIDBCursorWithValue.h"
#include "nsCycleCollectionParticipant.h"
class nsIRunnable;
class nsIScriptContext;
class nsPIDOMWindow;
BEGIN_INDEXEDDB_NAMESPACE
class IDBIndex;
class IDBRequest;
class IDBTransaction;
class ContinueHelper;
class ContinueObjectStoreHelper;
class ContinueIndexHelper;
class ContinueIndexObjectHelper;
class IDBCursor : public nsIIDBCursorWithValue
{
friend class ContinueHelper;
friend class ContinueObjectStoreHelper;
friend class ContinueIndexHelper;
friend class ContinueIndexObjectHelper;
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIIDBCURSOR
NS_DECL_NSIIDBCURSORWITHVALUE
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(IDBCursor)
enum Type
{
OBJECTSTORE = 0,
INDEXKEY,
INDEXOBJECT
};
enum Direction
{
NEXT = 0,
NEXT_UNIQUE,
PREV,
PREV_UNIQUE
};
// For OBJECTSTORE cursors.
static
already_AddRefed<IDBCursor>
Create(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBObjectStore* aObjectStore,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery,
const Key& aKey,
StructuredCloneReadInfo& aCloneReadInfo);
// For INDEXKEY cursors.
static
already_AddRefed<IDBCursor>
Create(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBIndex* aIndex,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery,
const Key& aKey,
const Key& aObjectKey);
// For INDEXOBJECT cursors.
static
already_AddRefed<IDBCursor>
Create(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBIndex* aIndex,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery,
const Key& aKey,
const Key& aObjectKey,
StructuredCloneReadInfo& aCloneReadInfo);
IDBTransaction* Transaction()
{
return mTransaction;
}
static nsresult ParseDirection(const nsAString& aDirection,
Direction* aResult);
protected:
IDBCursor();
~IDBCursor();
static
already_AddRefed<IDBCursor>
CreateCommon(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBObjectStore* aObjectStore,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery);
nsresult
ContinueInternal(const Key& aKey,
PRInt32 aCount);
nsRefPtr<IDBRequest> mRequest;
nsRefPtr<IDBTransaction> mTransaction;
nsRefPtr<IDBObjectStore> mObjectStore;
nsRefPtr<IDBIndex> mIndex;
JSObject* mScriptOwner;
Type mType;
Direction mDirection;
nsCString mContinueQuery;
nsCString mContinueToQuery;
// These are cycle-collected!
jsval mCachedKey;
jsval mCachedPrimaryKey;
jsval mCachedValue;
Key mRangeKey;
Key mKey;
Key mObjectKey;
StructuredCloneReadInfo mCloneReadInfo;
Key mContinueToKey;
bool mHaveCachedKey;
bool mHaveCachedPrimaryKey;
bool mHaveCachedValue;
bool mRooted;
bool mContinueCalled;
bool mHaveValue;
};
END_INDEXEDDB_NAMESPACE
#endif // mozilla_dom_indexeddb_idbcursor_h__