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 "DocumentMarkerController.h"
31 #include "Text.h"
32 #include <wtf/Assertions.h>
33
34 namespace WebCore {
35
SplitTextNodeCommand(PassRefPtr<Text> text,int offset)36 SplitTextNodeCommand::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
doApply()51 void SplitTextNodeCommand::doApply()
52 {
53 ContainerNode* parent = m_text2->parentNode();
54 if (!parent || !parent->rendererIsEditable())
55 return;
56
57 ExceptionCode ec = 0;
58 String prefixText = m_text2->substringData(0, m_offset, ec);
59 if (prefixText.isEmpty())
60 return;
61
62 m_text1 = Text::create(document(), prefixText);
63 ASSERT(m_text1);
64 document()->markers()->copyMarkers(m_text2.get(), 0, m_offset, m_text1.get(), 0);
65
66 insertText1AndTrimText2();
67 }
68
doUnapply()69 void SplitTextNodeCommand::doUnapply()
70 {
71 if (!m_text1 || !m_text1->rendererIsEditable())
72 return;
73
74 ASSERT(m_text1->document() == document());
75
76 String prefixText = m_text1->data();
77
78 ExceptionCode ec = 0;
79 m_text2->insertData(0, prefixText, ec);
80 ASSERT(!ec);
81
82 document()->markers()->copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0);
83 m_text1->remove(ec);
84 }
85
doReapply()86 void SplitTextNodeCommand::doReapply()
87 {
88 if (!m_text1 || !m_text2)
89 return;
90
91 ContainerNode* parent = m_text2->parentNode();
92 if (!parent || !parent->rendererIsEditable())
93 return;
94
95 insertText1AndTrimText2();
96 }
97
insertText1AndTrimText2()98 void SplitTextNodeCommand::insertText1AndTrimText2()
99 {
100 ExceptionCode ec = 0;
101 m_text2->parentNode()->insertBefore(m_text1.get(), m_text2.get(), ec);
102 if (ec)
103 return;
104 m_text2->deleteData(0, m_offset, ec);
105 }
106
107 } // namespace WebCore
108