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/SplitElementCommand.h"
28
29#include "HTMLNames.h"
30#include "bindings/v8/ExceptionState.h"
31#include "bindings/v8/ExceptionStatePlaceholder.h"
32#include "core/dom/Element.h"
33#include "wtf/Assertions.h"
34
35namespace WebCore {
36
37SplitElementCommand::SplitElementCommand(PassRefPtr<Element> element, PassRefPtr<Node> atChild)
38    : SimpleEditCommand(element->document())
39    , m_element2(element)
40    , m_atChild(atChild)
41{
42    ASSERT(m_element2);
43    ASSERT(m_atChild);
44    ASSERT(m_atChild->parentNode() == m_element2);
45}
46
47void SplitElementCommand::executeApply()
48{
49    if (m_atChild->parentNode() != m_element2)
50        return;
51
52    Vector<RefPtr<Node> > children;
53    for (Node* node = m_element2->firstChild(); node != m_atChild; node = node->nextSibling())
54        children.append(node);
55
56    TrackExceptionState es;
57
58    ContainerNode* parent = m_element2->parentNode();
59    if (!parent || !parent->rendererIsEditable())
60        return;
61    parent->insertBefore(m_element1.get(), m_element2.get(), es);
62    if (es.hadException())
63        return;
64
65    // Delete id attribute from the second element because the same id cannot be used for more than one element
66    m_element2->removeAttribute(HTMLNames::idAttr);
67
68    size_t size = children.size();
69    for (size_t i = 0; i < size; ++i)
70        m_element1->appendChild(children[i], es);
71}
72
73void SplitElementCommand::doApply()
74{
75    m_element1 = m_element2->cloneElementWithoutChildren();
76
77    executeApply();
78}
79
80void SplitElementCommand::doUnapply()
81{
82    if (!m_element1 || !m_element1->rendererIsEditable() || !m_element2->rendererIsEditable())
83        return;
84
85    Vector<RefPtr<Node> > children;
86    for (Node* node = m_element1->firstChild(); node; node = node->nextSibling())
87        children.append(node);
88
89    RefPtr<Node> refChild = m_element2->firstChild();
90
91    size_t size = children.size();
92    for (size_t i = 0; i < size; ++i)
93        m_element2->insertBefore(children[i].get(), refChild.get(), IGNORE_EXCEPTION);
94
95    // Recover the id attribute of the original element.
96    if (m_element1->hasAttribute(HTMLNames::idAttr))
97        m_element2->setAttribute(HTMLNames::idAttr, m_element1->getAttribute(HTMLNames::idAttr));
98
99    m_element1->remove(IGNORE_EXCEPTION);
100}
101
102void SplitElementCommand::doReapply()
103{
104    if (!m_element1)
105        return;
106
107    executeApply();
108}
109
110#ifndef NDEBUG
111void SplitElementCommand::getNodesInCommand(HashSet<Node*>& nodes)
112{
113    addNodeAndDescendants(m_element1.get(), nodes);
114    addNodeAndDescendants(m_element2.get(), nodes);
115    addNodeAndDescendants(m_atChild.get(), nodes);
116}
117#endif
118
119} // namespace WebCore
120