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=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_idbcursor_h__
#define mozilla_dom_idbcursor_h__
#include "IndexedDatabase.h"
#include "js/RootingAPI.h"
#include "mozilla/Attributes.h"
#include "mozilla/dom/IDBCursorBinding.h"
#include "mozilla/dom/indexedDB/Key.h"
#include "nsCycleCollectionParticipant.h"
#include "nsWrapperCache.h"
class nsIGlobalObject;
namespace mozilla {
class ErrorResult;
namespace dom {
class IDBIndex;
class IDBObjectStore;
class IDBRequest;
class IDBTransaction;
class OwningIDBObjectStoreOrIDBIndex;
namespace indexedDB {
class BackgroundCursorChild;
}
class IDBCursor final : public nsISupports, public nsWrapperCache {
public:
typedef indexedDB::Key Key;
typedef indexedDB::StructuredCloneReadInfo StructuredCloneReadInfo;
enum Direction {
NEXT = 0,
NEXT_UNIQUE,
PREV,
PREV_UNIQUE,
// Only needed for IPC serialization helper, should never be used in code.
DIRECTION_INVALID
};
private:
enum Type {
Type_ObjectStore,
Type_ObjectStoreKey,
Type_Index,
Type_IndexKey,
};
indexedDB::BackgroundCursorChild* mBackgroundActor;
RefPtr<IDBRequest> mRequest;
RefPtr<IDBObjectStore> mSourceObjectStore;
RefPtr<IDBIndex> mSourceIndex;
// mSourceObjectStore or mSourceIndex will hold this alive.
IDBTransaction* mTransaction;
// These are cycle-collected!
JS::Heap<JS::Value> mCachedKey;
JS::Heap<JS::Value> mCachedPrimaryKey;
JS::Heap<JS::Value> mCachedValue;
Key mKey;
Key mSortKey;
Key mPrimaryKey;
StructuredCloneReadInfo mCloneInfo;
const Type mType;
const Direction mDirection;
bool mHaveCachedKey : 1;
bool mHaveCachedPrimaryKey : 1;
bool mHaveCachedValue : 1;
bool mRooted : 1;
bool mContinueCalled : 1;
bool mHaveValue : 1;
public:
static already_AddRefed<IDBCursor> Create(
indexedDB::BackgroundCursorChild* aBackgroundActor, const Key& aKey,
StructuredCloneReadInfo&& aCloneInfo);
static already_AddRefed<IDBCursor> Create(
indexedDB::BackgroundCursorChild* aBackgroundActor, const Key& aKey);
static already_AddRefed<IDBCursor> Create(
indexedDB::BackgroundCursorChild* aBackgroundActor, const Key& aKey,
const Key& aSortKey, const Key& aPrimaryKey,
StructuredCloneReadInfo&& aCloneInfo);
static already_AddRefed<IDBCursor> Create(
indexedDB::BackgroundCursorChild* aBackgroundActor, const Key& aKey,
const Key& aSortKey, const Key& aPrimaryKey);
static Direction ConvertDirection(IDBCursorDirection aDirection);
void AssertIsOnOwningThread() const
#ifdef DEBUG
;
#else
{
}
#endif
nsIGlobalObject* GetParentObject() const;
void GetSource(OwningIDBObjectStoreOrIDBIndex& aSource) const;
IDBCursorDirection GetDirection() const;
void GetKey(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
ErrorResult& aRv);
void GetPrimaryKey(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
ErrorResult& aRv);
void GetValue(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
ErrorResult& aRv);
void Continue(JSContext* aCx, JS::Handle<JS::Value> aKey, ErrorResult& aRv);
void ContinuePrimaryKey(JSContext* aCx, JS::Handle<JS::Value> aKey,
JS::Handle<JS::Value> aPrimaryKey, ErrorResult& aRv);
void Advance(uint32_t aCount, ErrorResult& aRv);
already_AddRefed<IDBRequest> Update(JSContext* aCx,
JS::Handle<JS::Value> aValue,
ErrorResult& aRv);
already_AddRefed<IDBRequest> Delete(JSContext* aCx, ErrorResult& aRv);
void Reset();
void Reset(Key&& aKey, StructuredCloneReadInfo&& aValue);
void Reset(Key&& aKey);
void Reset(Key&& aKey, Key&& aSortKey, Key&& aPrimaryKey,
StructuredCloneReadInfo&& aValue);
void Reset(Key&& aKey, Key&& aSortKey, Key&& aPrimaryKey);
void ClearBackgroundActor() {
AssertIsOnOwningThread();
mBackgroundActor = nullptr;
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(IDBCursor)
// nsWrapperCache
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
private:
IDBCursor(Type aType, indexedDB::BackgroundCursorChild* aBackgroundActor,
const Key& aKey);
~IDBCursor();
// Checks if this is a locale aware cursor (ie. the index's sortKey is unset)
bool IsLocaleAware() const;
void DropJSObjects();
bool IsSourceDeleted() const;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_idbcursor_h__