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 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 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(Ref<Element>&& first, Ref<Element>&& second)
34 : SimpleEditCommand(first->document())
35 , m_element1(WTFMove(first))
36 , m_element2(WTFMove(second))
37{
38 ASSERT(m_element1->nextSibling() == m_element2.ptr());
39}
40
41void MergeIdenticalElementsCommand::doApply()
42{
43 if (m_element1->nextSibling() != m_element2.ptr() || !m_element1->hasEditableStyle() || !m_element2->hasEditableStyle())
44 return;
45
46 m_atChild = m_element2->firstChild();
47
48 Vector<Ref<Node>> children;
49 for (Node* child = m_element1->firstChild(); child; child = child->nextSibling())
50 children.append(*child);
51
52 for (auto& child : children)
53 m_element2->insertBefore(child, m_atChild.get());
54
55 m_element1->remove();
56}
57
58void MergeIdenticalElementsCommand::doUnapply()
59{
60 RefPtr<Node> atChild = WTFMove(m_atChild);
61
62 auto* parent = m_element2->parentNode();
63 if (!parent || !parent->hasEditableStyle())
64 return;
65
66 if (parent->insertBefore(m_element1, m_element2.ptr()).hasException())
67 return;
68
69 Vector<Ref<Node>> children;
70 for (Node* child = m_element2->firstChild(); child && child != atChild; child = child->nextSibling())
71 children.append(*child);
72
73 for (auto& child : children)
74 m_element1->appendChild(child);
75}
76
77#ifndef NDEBUG
78void MergeIdenticalElementsCommand::getNodesInCommand(HashSet<Node*>& nodes)
79{
80 addNodeAndDescendants(m_element1.ptr(), nodes);
81 addNodeAndDescendants(m_element2.ptr(), nodes);
82}
83#endif
84
85} // namespace WebCore
86