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/*
* 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 "VoidCallback.h"
#include <wtf/IsoMalloc.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class Document;
class UndoManager;
class UndoItem : public RefCounted<UndoItem>, public CanMakeWeakPtr<UndoItem> {
WTF_MAKE_ISO_ALLOCATED(UndoItem);
public:
struct Init {
String label;
RefPtr<VoidCallback> undo;
RefPtr<VoidCallback> redo;
};
static Ref<UndoItem> create(Init&& init)
{
return adoptRef(*new UndoItem(WTFMove(init)));
}
bool isValid() const;
void invalidate();
Document* document() const;
UndoManager* undoManager() const;
void setUndoManager(UndoManager*);
const String& label() const { return m_label; }
VoidCallback& undoHandler() const { return m_undoHandler.get(); }
VoidCallback& redoHandler() const { return m_redoHandler.get(); }
private:
UndoItem(Init&& init)
: m_label(WTFMove(init.label))
, m_undoHandler(init.undo.releaseNonNull())
, m_redoHandler(init.redo.releaseNonNull())
{
}
String m_label;
Ref<VoidCallback> m_undoHandler;
Ref<VoidCallback> m_redoHandler;
WeakPtr<UndoManager> m_undoManager;
WeakPtr<Document> m_document;
};
} // namespace WebCore