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