| /* |
| * 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 |
| |
| #if ENABLE(INDEXED_DATABASE) |
| |
| #include "ActiveDOMObject.h" |
| #include "ExceptionOr.h" |
| #include "IDBCursorDirection.h" |
| #include "IDBCursorInfo.h" |
| #include <JavaScriptCore/Strong.h> |
| #include <wtf/Variant.h> |
| |
| namespace WebCore { |
| |
| class IDBGetResult; |
| class IDBIndex; |
| class IDBObjectStore; |
| class IDBTransaction; |
| |
| class IDBCursor : public ScriptWrappable, public RefCounted<IDBCursor>, public ActiveDOMObject { |
| public: |
| static Ref<IDBCursor> create(IDBTransaction&, IDBObjectStore&, const IDBCursorInfo&); |
| static Ref<IDBCursor> create(IDBTransaction&, IDBIndex&, const IDBCursorInfo&); |
| |
| virtual ~IDBCursor(); |
| |
| using Source = Variant<RefPtr<IDBObjectStore>, RefPtr<IDBIndex>>; |
| |
| const Source& source() const; |
| IDBCursorDirection direction() const; |
| JSC::JSValue key() const; |
| JSC::JSValue primaryKey() const; |
| JSC::JSValue value() const; |
| |
| ExceptionOr<Ref<IDBRequest>> update(JSC::ExecState&, JSC::JSValue); |
| ExceptionOr<void> advance(unsigned); |
| ExceptionOr<void> continueFunction(JSC::ExecState&, JSC::JSValue key); |
| ExceptionOr<void> continuePrimaryKey(JSC::ExecState&, JSC::JSValue key, JSC::JSValue primaryKey); |
| ExceptionOr<Ref<IDBRequest>> deleteFunction(JSC::ExecState&); |
| |
| ExceptionOr<void> continueFunction(const IDBKeyData&); |
| |
| const IDBCursorInfo& info() const { return m_info; } |
| |
| void setRequest(IDBRequest& request) { m_request = &request; } |
| void clearRequest() { m_request = nullptr; } |
| IDBRequest* request() { return m_request; } |
| |
| void setGetResult(IDBRequest&, const IDBGetResult&); |
| |
| virtual bool isKeyCursorWithValue() const { return false; } |
| |
| void decrementOutstandingRequestCount(); |
| |
| bool hasPendingActivity() const final; |
| |
| protected: |
| IDBCursor(IDBTransaction&, IDBObjectStore&, const IDBCursorInfo&); |
| IDBCursor(IDBTransaction&, IDBIndex&, const IDBCursorInfo&); |
| |
| private: |
| const char* activeDOMObjectName() const final; |
| bool canSuspendForDocumentSuspension() const final; |
| |
| bool sourcesDeleted() const; |
| IDBObjectStore& effectiveObjectStore() const; |
| IDBTransaction& transaction() const; |
| |
| void uncheckedIterateCursor(const IDBKeyData&, unsigned count); |
| void uncheckedIterateCursor(const IDBKeyData&, const IDBKeyData&); |
| |
| // Cursors are created with an outstanding iteration request. |
| unsigned m_outstandingRequestCount { 1 }; |
| |
| IDBCursorInfo m_info; |
| Source m_source; |
| IDBRequest* m_request { nullptr }; |
| |
| bool m_gotValue { false }; |
| |
| IDBKeyData m_currentKeyData; |
| IDBKeyData m_currentPrimaryKeyData; |
| |
| // FIXME: The following uses of JSC::Strong are incorrect and can lead to storage leaks |
| // due to reference cycles; we should use JSValueInWrappedObject instead. |
| JSC::Strong<JSC::Unknown> m_currentKey; |
| JSC::Strong<JSC::Unknown> m_currentPrimaryKey; |
| JSC::Strong<JSC::Unknown> m_currentValue; |
| }; |
| |
| |
| inline const IDBCursor::Source& IDBCursor::source() const |
| { |
| return m_source; |
| } |
| |
| inline IDBCursorDirection IDBCursor::direction() const |
| { |
| return m_info.cursorDirection(); |
| } |
| |
| inline JSC::JSValue IDBCursor::key() const |
| { |
| return m_currentKey.get(); |
| } |
| |
| inline JSC::JSValue IDBCursor::primaryKey() const |
| { |
| return m_currentPrimaryKey.get(); |
| } |
| |
| inline JSC::JSValue IDBCursor::value() const |
| { |
| return m_currentValue.get(); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(INDEXED_DATABASE) |