/* * Copyright (C) 2019 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 <wtf/IsoMalloc.h> #include <wtf/Ref.h> #include <wtf/RefCounted.h> #include <wtf/RefPtr.h> #include <wtf/WeakPtr.h> namespace WebCore { class Document; class UndoItem; class UndoManager : public RefCounted<UndoManager>, public CanMakeWeakPtr<UndoManager> { WTF_MAKE_ISO_ALLOCATED(UndoManager); public: static Ref<UndoManager> create(Document& document) { return adoptRef(*new UndoManager(document)); } ~UndoManager(); void removeItem(UndoItem&); void removeAllItems(); ExceptionOr<void> addItem(Ref<UndoItem>&&); Document& document() { return m_document; } private: UndoManager(Document&); Document& m_document; HashSet<RefPtr<UndoItem>> m_items; }; } // namespace WebCore