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 "SplitElementCommand.h"
28
29#include "Element.h"
30#include "HTMLNames.h"
31#include <wtf/Assertions.h>
32
33namespace WebCore {
34
35SplitElementCommand::SplitElementCommand(PassRefPtr<Element> element, PassRefPtr<Node> atChild)
36    : SimpleEditCommand(element->document())
37    , m_element2(element)
38    , m_atChild(atChild)
39{
40    ASSERT(m_element2);
41    ASSERT(m_atChild);
42    ASSERT(m_atChild->parentNode() == m_element2);
43}
44
45void SplitElementCommand::executeApply()
46{
47    if (m_atChild->parentNode() != m_element2)
48        return;
49
50    Vector<RefPtr<Node> > children;
51    for (Node* node = m_element2->firstChild(); node != m_atChild; node = node->nextSibling())
52        children.append(node);
53
54    ExceptionCode ec = 0;
55
56    ContainerNode* parent = m_element2->parentNode();
57    if (!parent || !parent->rendererIsEditable())
58        return;
59    parent->insertBefore(m_element1.get(), m_element2.get(), ec);
60    if (ec)
61        return;
62
63    // Delete id attribute from the second element because the same id cannot be used for more than one element
64    m_element2->removeAttribute(HTMLNames::idAttr);
65
66    size_t size = children.size();
67    for (size_t i = 0; i < size; ++i)
68        m_element1->appendChild(children[i], ec);
69}
70
71void SplitElementCommand::doApply()
72{
73    m_element1 = m_element2->cloneElementWithoutChildren();
74
75    executeApply();
76}
77
78void SplitElementCommand::doUnapply()
79{
80    if (!m_element1 || !m_element1->rendererIsEditable() || !m_element2->rendererIsEditable())
81        return;
82
83    Vector<RefPtr<Node> > children;
84    for (Node* node = m_element1->firstChild(); node; node = node->nextSibling())
85        children.append(node);
86
87    RefPtr<Node> refChild = m_element2->firstChild();
88
89    size_t size = children.size();
90    for (size_t i = 0; i < size; ++i)
91        m_element2->insertBefore(children[i].get(), refChild.get(), IGNORE_EXCEPTION);
92
93    // Recover the id attribute of the original element.
94    if (m_element1->hasAttribute(HTMLNames::idAttr))
95        m_element2->setAttribute(HTMLNames::idAttr, m_element1->getAttribute(HTMLNames::idAttr));
96
97    m_element1->remove(IGNORE_EXCEPTION);
98}
99
100void SplitElementCommand::doReapply()
101{
102    if (!m_element1)
103        return;
104
105    executeApply();
106}
107
108#ifndef NDEBUG
109void SplitElementCommand::getNodesInCommand(HashSet<Node*>& nodes)
110{
111    addNodeAndDescendants(m_element1.get(), nodes);
112    addNodeAndDescendants(m_element2.get(), nodes);
113    addNodeAndDescendants(m_atChild.get(), nodes);
114}
115#endif
116
117} // namespace WebCore
118