/*

* Copyright (C) 2007, 2015 Apple Inc. All rights reserved.

* (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>

*

* This library is free software; you can redistribute it and/or

* modify it under the terms of the GNU Library General Public

* License as published by the Free Software Foundation; either

* version 2 of the License, or (at your option) any later version.

*

* This library is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Library General Public License for more details.

*

* You should have received a copy of the GNU Library General Public License

* along with this library; see the file COPYING.LIB. If not, write to

* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

* Boston, MA 02110-1301, USA.

*

*/

#pragma once

#include "ContainerNode.h"

#include <wtf/Assertions.h>

namespace WebCore {

// FIXME: Delete this class after fixing FormAssociatedElement to avoid calling getElementById during a tree removal.

#if ASSERT_ENABLED

class ContainerChildRemovalScope {

public:

ContainerChildRemovalScope(ContainerNode& parentOfRemovedTree, Node& child)

: m_parentOfRemovedTree(parentOfRemovedTree)

, m_removedChild(child)

, m_previousScope(s_scope)

{

s_scope = this;

}

~ContainerChildRemovalScope()

{

s_scope = m_previousScope;

}

ContainerNode& parentOfRemovedTree() { return m_parentOfRemovedTree; }

Node& removedChild() { return m_removedChild; }

static ContainerChildRemovalScope* currentScope() { return s_scope; }

private:

ContainerNode& m_parentOfRemovedTree;

Node& m_removedChild;

ContainerChildRemovalScope* m_previousScope;

static ContainerChildRemovalScope* s_scope;

};

#else // not ASSERT_ENABLED

class ContainerChildRemovalScope {

public:

ContainerChildRemovalScope(ContainerNode&, Node&) { }

};

#endif // not ASSERT_ENABLED

NodeVector notifyChildNodeInserted(ContainerNode& parentOfInsertedTree, Node&);

enum class RemovedSubtreeObservability {

NotObservable,

MaybeObservableByRefPtr,

};

RemovedSubtreeObservability notifyChildNodeRemoved(ContainerNode& oldParentOfRemovedTree, Node&);

void removeDetachedChildrenInContainer(ContainerNode&);

enum SubframeDisconnectPolicy {

RootAndDescendants,

DescendantsOnly

};

void disconnectSubframes(ContainerNode& root, SubframeDisconnectPolicy);

inline void disconnectSubframesIfNeeded(ContainerNode& root, SubframeDisconnectPolicy policy)

{

if (!root.connectedSubframeCount())

return;

disconnectSubframes(root, policy);

}

} // namespace WebCore