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 "SplitTextNodeCommand.h"
28
29#include "Document.h"
30#include "DocumentMarkerController.h"
31#include "Text.h"
32#include <wtf/Assertions.h>
33
34namespace WebCore {
35
36SplitTextNodeCommand::SplitTextNodeCommand(PassRefPtr<Text> text, int offset)
37    : SimpleEditCommand(text->document())
38    , m_text2(text)
39    , m_offset(offset)
40{
41    // NOTE: Various callers rely on the fact that the original node becomes
42    // the second node (i.e. the new node is inserted before the existing one).
43    // That is not a fundamental dependency (i.e. it could be re-coded), but
44    // rather is based on how this code happens to work.
45    ASSERT(m_text2);
46    ASSERT(m_text2->length() > 0);
47    ASSERT(m_offset > 0);
48    ASSERT(m_offset < m_text2->length());
49}
50
51void SplitTextNodeCommand::doApply()
52{
53    ContainerNode* parent = m_text2->parentNode();
54    if (!parent || !parent->hasEditableStyle())
55        return;
56
57    String prefixText = m_text2->substringData(0, m_offset, IGNORE_EXCEPTION);
58    if (prefixText.isEmpty())
59        return;
60
61    m_text1 = Text::create(document(), prefixText);
62    ASSERT(m_text1);
63    document().markers().copyMarkers(m_text2.get(), 0, m_offset, m_text1.get(), 0);
64
65    insertText1AndTrimText2();
66}
67
68void SplitTextNodeCommand::doUnapply()
69{
70    if (!m_text1 || !m_text1->hasEditableStyle())
71        return;
72
73    ASSERT(&m_text1->document() == &document());
74
75    String prefixText = m_text1->data();
76
77    m_text2->insertData(0, prefixText, ASSERT_NO_EXCEPTION);
78
79    document().markers().copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0);
80    m_text1->remove(ASSERT_NO_EXCEPTION);
81}
82
83void SplitTextNodeCommand::doReapply()
84{
85    if (!m_text1 || !m_text2)
86        return;
87
88    ContainerNode* parent = m_text2->parentNode();
89    if (!parent || !parent->hasEditableStyle())
90        return;
91
92    insertText1AndTrimText2();
93}
94
95void SplitTextNodeCommand::insertText1AndTrimText2()
96{
97    ExceptionCode ec = 0;
98    m_text2->parentNode()->insertBefore(m_text1.get(), m_text2.get(), ec);
99    if (ec)
100        return;
101    m_text2->deleteData(0, m_offset, ec);
102}
103
104#ifndef NDEBUG
105void SplitTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
106{
107    addNodeAndDescendants(m_text1.get(), nodes);
108    addNodeAndDescendants(m_text2.get(), nodes);
109}
110#endif
111
112} // namespace WebCore
113