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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ExceptionOr.h"
#include "IDBCursorDirection.h"
#include "IDBCursorInfo.h"
#include "IDBKeyPath.h"
#include "IDBRequest.h"
#include "IDBValue.h"
#include "JSValueInWrappedObject.h"
#include <JavaScriptCore/Strong.h>
#include <variant>
#include <wtf/WeakPtr.h>
namespace WebCore {
class IDBGetResult;
class IDBIndex;
class IDBObjectStore;
class IDBTransaction;
class IDBCursor : public ScriptWrappable, public RefCounted<IDBCursor> {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(IDBCursor);
public:
static Ref<IDBCursor> create(IDBObjectStore&, const IDBCursorInfo&);
static Ref<IDBCursor> create(IDBIndex&, const IDBCursorInfo&);
virtual ~IDBCursor();
using Source = std::variant<RefPtr<IDBObjectStore>, RefPtr<IDBIndex>>;
const Source& source() const;
IDBCursorDirection direction() const;
IDBKey* key() { return m_key.get(); };
IDBKey* primaryKey() { return m_primaryKey.get(); };
IDBValue value() { return m_value; };
const std::optional<IDBKeyPath>& primaryKeyPath() { return m_keyPath; };
JSValueInWrappedObject& keyWrapper() { return m_keyWrapper; }
JSValueInWrappedObject& primaryKeyWrapper() { return m_primaryKeyWrapper; }
JSValueInWrappedObject& valueWrapper() { return m_valueWrapper; }
ExceptionOr<Ref<IDBRequest>> update(JSC::JSGlobalObject&, JSC::JSValue);
ExceptionOr<void> advance(unsigned);
ExceptionOr<void> continueFunction(JSC::JSGlobalObject&, JSC::JSValue key);
ExceptionOr<void> continuePrimaryKey(JSC::JSGlobalObject&, JSC::JSValue key, JSC::JSValue primaryKey);
ExceptionOr<Ref<IDBRequest>> deleteFunction();
ExceptionOr<void> continueFunction(const IDBKeyData&);
const IDBCursorInfo& info() const { return m_info; }
void setRequest(IDBRequest& request) { m_request = request; }
void clearRequest() { m_request.clear(); }
void clearWrappers();
IDBRequest* request() { return m_request.get(); }
bool setGetResult(IDBRequest&, const IDBGetResult&, uint64_t operationID);
virtual bool isKeyCursorWithValue() const { return false; }
std::optional<IDBGetResult> iterateWithPrefetchedRecords(unsigned count, uint64_t lastWriteOperationID);
void clearPrefetchedRecords();
protected:
IDBCursor(IDBObjectStore&, const IDBCursorInfo&);
IDBCursor(IDBIndex&, const IDBCursorInfo&);
private:
bool sourcesDeleted() const;
IDBObjectStore& effectiveObjectStore() const;
IDBTransaction& transaction() const;
void uncheckedIterateCursor(const IDBKeyData&, unsigned count);
void uncheckedIterateCursor(const IDBKeyData&, const IDBKeyData&);
IDBCursorInfo m_info;
Source m_source;
WeakPtr<IDBRequest, WeakPtrImplWithEventTargetData> m_request;
bool m_gotValue { false };
RefPtr<IDBKey> m_key;
RefPtr<IDBKey> m_primaryKey;
IDBKeyData m_keyData;
IDBKeyData m_primaryKeyData;
IDBValue m_value;
std::optional<IDBKeyPath> m_keyPath;
JSValueInWrappedObject m_keyWrapper;
JSValueInWrappedObject m_primaryKeyWrapper;
JSValueInWrappedObject m_valueWrapper;
Deque<IDBCursorRecord> m_prefetchedRecords;
uint64_t m_prefetchOperationID { 0 };
};
inline const IDBCursor::Source& IDBCursor::source() const
{
return m_source;
}
inline IDBCursorDirection IDBCursor::direction() const
{
return m_info.cursorDirection();
}
} // namespace WebCore
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