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 "bindings/core/v8/ExceptionState.h"
30#include "bindings/core/v8/ExceptionStatePlaceholder.h"
31#include "core/HTMLNames.h"
32#include "core/dom/Element.h"
33#include "wtf/Assertions.h"
34
35namespace blink {
36
37SplitElementCommand::SplitElementCommand(PassRefPtrWillBeRawPtr<Element> element, PassRefPtrWillBeRawPtr<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    WillBeHeapVector<RefPtrWillBeMember<Node> > children;
53    for (Node* node = m_element2->firstChild(); node != m_atChild; node = node->nextSibling())
54        children.append(node);
55
56    TrackExceptionState exceptionState;
57
58    ContainerNode* parent = m_element2->parentNode();
59    if (!parent || !parent->hasEditableStyle())
60        return;
61    parent->insertBefore(m_element1.get(), m_element2.get(), exceptionState);
62    if (exceptionState.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], exceptionState);
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->hasEditableStyle() || !m_element2->hasEditableStyle())
83        return;
84
85    NodeVector children;
86    getChildNodes(*m_element1, children);
87
88    RefPtrWillBeRawPtr<Node> refChild = m_element2->firstChild();
89
90    size_t size = children.size();
91    for (size_t i = 0; i < size; ++i)
92        m_element2->insertBefore(children[i].get(), refChild.get(), IGNORE_EXCEPTION);
93
94    // Recover the id attribute of the original element.
95    const AtomicString& id = m_element1->getAttribute(HTMLNames::idAttr);
96    if (!id.isNull())
97        m_element2->setAttribute(HTMLNames::idAttr, id);
98
99    m_element1->remove(IGNORE_EXCEPTION);
100}
101
102void SplitElementCommand::doReapply()
103{
104    if (!m_element1)
105        return;
106
107    executeApply();
108}
109
110void SplitElementCommand::trace(Visitor* visitor)
111{
112    visitor->trace(m_element1);
113    visitor->trace(m_element2);
114    visitor->trace(m_atChild);
115    SimpleEditCommand::trace(visitor);
116}
117
118} // namespace blink
119