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 "core/editing/MergeIdenticalElementsCommand.h"
28
29#include "bindings/core/v8/ExceptionState.h"
30#include "bindings/core/v8/ExceptionStatePlaceholder.h"
31#include "core/dom/Element.h"
32
33namespace blink {
34
35MergeIdenticalElementsCommand::MergeIdenticalElementsCommand(PassRefPtrWillBeRawPtr<Element> first, PassRefPtrWillBeRawPtr<Element> second)
36    : SimpleEditCommand(first->document())
37    , m_element1(first)
38    , m_element2(second)
39{
40    ASSERT(m_element1);
41    ASSERT(m_element2);
42    ASSERT(m_element1->nextSibling() == m_element2);
43}
44
45void MergeIdenticalElementsCommand::doApply()
46{
47    if (m_element1->nextSibling() != m_element2 || !m_element1->hasEditableStyle() || !m_element2->hasEditableStyle())
48        return;
49
50    m_atChild = m_element2->firstChild();
51
52    NodeVector children;
53    getChildNodes(*m_element1, children);
54
55    size_t size = children.size();
56    for (size_t i = 0; i < size; ++i)
57        m_element2->insertBefore(children[i].release(), m_atChild.get(), IGNORE_EXCEPTION);
58
59    m_element1->remove(IGNORE_EXCEPTION);
60}
61
62void MergeIdenticalElementsCommand::doUnapply()
63{
64    ASSERT(m_element1);
65    ASSERT(m_element2);
66
67    RefPtrWillBeRawPtr<Node> atChild = m_atChild.release();
68
69    ContainerNode* parent = m_element2->parentNode();
70    if (!parent || !parent->hasEditableStyle())
71        return;
72
73    TrackExceptionState exceptionState;
74
75    parent->insertBefore(m_element1.get(), m_element2.get(), exceptionState);
76    if (exceptionState.hadException())
77        return;
78
79    WillBeHeapVector<RefPtrWillBeMember<Node> > children;
80    for (Node* child = m_element2->firstChild(); child && child != atChild; child = child->nextSibling())
81        children.append(child);
82
83    size_t size = children.size();
84    for (size_t i = 0; i < size; ++i)
85        m_element1->appendChild(children[i].release(), exceptionState);
86}
87
88void MergeIdenticalElementsCommand::trace(Visitor* visitor)
89{
90    visitor->trace(m_element1);
91    visitor->trace(m_element2);
92    visitor->trace(m_atChild);
93    SimpleEditCommand::trace(visitor);
94}
95
96} // namespace blink
97