/*

* Copyright (C) 2018 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 "ChangeListTypeCommand.h"

#include "Editing.h"

#include "ElementAncestorIteratorInlines.h"

#include "FrameDestructionObserverInlines.h"

#include "FrameSelection.h"

#include "HTMLElement.h"

#include "HTMLOListElement.h"

#include "HTMLUListElement.h"

#include "LocalFrame.h"

#include <wtf/RefPtr.h>

namespace WebCore {

static std::optional<std::pair<ChangeListTypeCommand::Type, Ref<HTMLElement>>> listConversionTypeForSelection(const VisibleSelection& selection)

{

auto startNode = selection.start().containerNode();

auto endNode = selection.end().containerNode();

if (!startNode || !endNode)

return { };

auto commonAncestor = commonInclusiveAncestor<ComposedTree>(*startNode, *endNode);

RefPtr<HTMLElement> listToReplace;

if (auto* htmlElement = dynamicDowncast<HTMLElement>(commonAncestor); is<HTMLUListElement>(htmlElement) || is<HTMLOListElement>(htmlElement))

listToReplace = htmlElement;

else

listToReplace = enclosingList(commonAncestor);

if (is<HTMLUListElement>(listToReplace))

return {{ ChangeListTypeCommand::Type::ConvertToOrderedList, listToReplace.releaseNonNull() }};

if (is<HTMLOListElement>(listToReplace))

return {{ ChangeListTypeCommand::Type::ConvertToUnorderedList, listToReplace.releaseNonNull() }};

return std::nullopt;

}

std::optional<ChangeListTypeCommand::Type> ChangeListTypeCommand::listConversionType(Document& document)

{

if (RefPtr frame = document.frame()) {

if (auto typeAndElement = listConversionTypeForSelection(frame->selection().selection()))

return typeAndElement->first;

}

return std::nullopt;

}

Ref<HTMLElement> ChangeListTypeCommand::createNewList(const HTMLElement& listToReplace)

{

RefPtr<HTMLElement> list;

if (m_type == Type::ConvertToOrderedList)

list = HTMLOListElement::create(document());

else

list = HTMLUListElement::create(document());

list->cloneDataFromElement(listToReplace);

return list.releaseNonNull();

}

void ChangeListTypeCommand::doApply()

{

auto typeAndElement = listConversionTypeForSelection(endingSelection());

if (!typeAndElement || typeAndElement->first != m_type)

return;

auto listToReplace = WTFMove(typeAndElement->second);

auto newList = createNewList(listToReplace);

insertNodeBefore(newList.copyRef(), listToReplace);

moveRemainingSiblingsToNewParent(listToReplace->firstChild(), nullptr, newList);

removeNode(listToReplace);

setEndingSelection({ Position { newList.ptr(), Position::PositionIsAfterChildren }});

}

} // namespace WebCore