/*

* 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.

*/

#include "config.h"

#include "CustomUndoStep.h"

#include "Document.h"

#include "UndoItem.h"

#include "UndoManager.h"

#include "VoidCallback.h"

namespace WebCore {

CustomUndoStep::CustomUndoStep(UndoItem& item)

: m_undoItem(makeWeakPtr(item))

{

}

void CustomUndoStep::unapply()

{

if (!isValid())

return;

// FIXME: It's currently unclear how input events should be dispatched when unapplying or reapplying custom

// edit commands. Should the page be allowed to specify a target in the DOM for undo and redo?

Ref<UndoItem> protectedUndoItem(*m_undoItem);

protectedUndoItem->document()->updateLayoutIgnorePendingStylesheets();

protectedUndoItem->undoHandler().handleEvent();

}

void CustomUndoStep::reapply()

{

if (!isValid())

return;

Ref<UndoItem> protectedUndoItem(*m_undoItem);

protectedUndoItem->document()->updateLayoutIgnorePendingStylesheets();

protectedUndoItem->redoHandler().handleEvent();

}

bool CustomUndoStep::isValid() const

{

return m_undoItem && m_undoItem->isValid();

}

String CustomUndoStep::label() const

{

if (!isValid()) {

ASSERT_NOT_REACHED();

return emptyString();

}

return m_undoItem->label();

}

void CustomUndoStep::didRemoveFromUndoManager()

{

if (auto undoItem = std::exchange(m_undoItem, nullptr))

undoItem->invalidate();

}

} // namespace WebCore