gecko-dev/dom/indexedDB/IDBCursor.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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_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 ContinueHelper;
class ContinueObjectStoreHelper;
class ContinueIndexHelper;
class ContinueIndexObjectHelper;
class IDBIndex;
class IDBRequest;
class IDBTransaction;
class IndexedDBCursorChild;
class IndexedDBCursorParent;
class IDBCursor MOZ_FINAL : 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,
// Only needed for IPC serialization helper, should never be used in code.
DIRECTION_INVALID
};
// 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() const
{
return mTransaction;
}
IDBRequest* Request() const
{
return mRequest;
}
static nsresult ParseDirection(const nsAString& aDirection,
Direction* aResult);
void
SetActor(IndexedDBCursorChild* aActorChild)
{
NS_ASSERTION(!aActorChild || !mActorChild, "Shouldn't have more than one!");
mActorChild = aActorChild;
}
void
SetActor(IndexedDBCursorParent* aActorParent)
{
NS_ASSERTION(!aActorParent || !mActorParent,
"Shouldn't have more than one!");
mActorParent = aActorParent;
}
IndexedDBCursorChild*
GetActorChild() const
{
return mActorChild;
}
IndexedDBCursorParent*
GetActorParent() const
{
return mActorParent;
}
nsresult
ContinueInternal(const Key& aKey,
int32_t aCount);
protected:
IDBCursor();
~IDBCursor();
void DropJSObjects();
static
already_AddRefed<IDBCursor>
CreateCommon(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBObjectStore* aObjectStore,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery);
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;
IndexedDBCursorChild* mActorChild;
IndexedDBCursorParent* mActorParent;
bool mHaveCachedKey;
bool mHaveCachedPrimaryKey;
bool mHaveCachedValue;
bool mRooted;
bool mContinueCalled;
bool mHaveValue;
};
END_INDEXEDDB_NAMESPACE
#endif // mozilla_dom_indexeddb_idbcursor_h__