1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
6 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
7 * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
8 * Copyright (C) 2011 Google Inc. All rights reserved.
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * Library General Public License for more details.
19 *
20 * You should have received a copy of the GNU Library General Public License
21 * along with this library; see the file COPYING.LIB.  If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
24 */
25#ifndef TreeScopeAdopter_h
26#define TreeScopeAdopter_h
27
28#include "core/dom/Node.h"
29
30namespace blink {
31
32class TreeScope;
33
34class TreeScopeAdopter {
35    STACK_ALLOCATED();
36public:
37    TreeScopeAdopter(Node& toAdopt, TreeScope& newScope);
38
39    void execute() const { moveTreeToNewScope(*m_toAdopt); }
40    bool needsScopeChange() const { return m_oldScope != m_newScope; }
41
42#if ENABLE(ASSERT)
43    static void ensureDidMoveToNewDocumentWasCalled(Document&);
44#else
45    static void ensureDidMoveToNewDocumentWasCalled(Document&) { }
46#endif
47
48private:
49    void updateTreeScope(Node&) const;
50    void moveTreeToNewScope(Node&) const;
51    void moveTreeToNewDocument(Node&, Document& oldDocument, Document& newDocument) const;
52    void moveNodeToNewDocument(Node&, Document& oldDocument, Document& newDocument) const;
53    TreeScope& oldScope() const { return *m_oldScope; }
54    TreeScope& newScope() const { return *m_newScope; }
55
56    RawPtrWillBeMember<Node> m_toAdopt;
57    RawPtrWillBeMember<TreeScope> m_newScope;
58    RawPtrWillBeMember<TreeScope> m_oldScope;
59};
60
61inline TreeScopeAdopter::TreeScopeAdopter(Node& toAdopt, TreeScope& newScope)
62    : m_toAdopt(toAdopt)
63    , m_newScope(newScope)
64    , m_oldScope(toAdopt.treeScope())
65{
66}
67
68}
69
70#endif
71