1/*
2 * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "MergeIdenticalElementsCommand.h"
28
29#include "Element.h"
30
31namespace WebCore {
32
33MergeIdenticalElementsCommand::MergeIdenticalElementsCommand(PassRefPtr<Element> first, PassRefPtr<Element> second)
34    : SimpleEditCommand(first->document())
35    , m_element1(first)
36    , m_element2(second)
37{
38    ASSERT(m_element1);
39    ASSERT(m_element2);
40    ASSERT(m_element1->nextSibling() == m_element2);
41}
42
43void MergeIdenticalElementsCommand::doApply()
44{
45    if (m_element1->nextSibling() != m_element2 || !m_element1->rendererIsEditable() || !m_element2->rendererIsEditable())
46        return;
47
48    m_atChild = m_element2->firstChild();
49
50    Vector<RefPtr<Node> > children;
51    for (Node* child = m_element1->firstChild(); child; child = child->nextSibling())
52        children.append(child);
53
54    size_t size = children.size();
55    for (size_t i = 0; i < size; ++i)
56        m_element2->insertBefore(children[i].release(), m_atChild.get(), IGNORE_EXCEPTION);
57
58    m_element1->remove(IGNORE_EXCEPTION);
59}
60
61void MergeIdenticalElementsCommand::doUnapply()
62{
63    ASSERT(m_element1);
64    ASSERT(m_element2);
65
66    RefPtr<Node> atChild = m_atChild.release();
67
68    ContainerNode* parent = m_element2->parentNode();
69    if (!parent || !parent->rendererIsEditable())
70        return;
71
72    ExceptionCode ec = 0;
73
74    parent->insertBefore(m_element1.get(), m_element2.get(), ec);
75    if (ec)
76        return;
77
78    Vector<RefPtr<Node> > children;
79    for (Node* child = m_element2->firstChild(); child && child != atChild; child = child->nextSibling())
80        children.append(child);
81
82    size_t size = children.size();
83    for (size_t i = 0; i < size; ++i)
84        m_element1->appendChild(children[i].release(), ec);
85}
86
87#ifndef NDEBUG
88void MergeIdenticalElementsCommand::getNodesInCommand(HashSet<Node*>& nodes)
89{
90    addNodeAndDescendants(m_element1.get(), nodes);
91    addNodeAndDescendants(m_element2.get(), nodes);
92}
93#endif
94
95} // namespace WebCore
96