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(Ref<Text>&& text, int offset)
37 : SimpleEditCommand(text->document())
38 , m_text2(WTFMove(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->length() > 0);
46 ASSERT(m_offset > 0);
47 ASSERT(m_offset < m_text2->length());
48}
49
50void SplitTextNodeCommand::doApply()
51{
52 ContainerNode* parent = m_text2->parentNode();
53 if (!parent || !parent->hasEditableStyle())
54 return;
55
56 auto result = m_text2->substringData(0, m_offset);
57 if (result.hasException())
58 return;
59 auto prefixText = result.releaseReturnValue();
60 if (prefixText.isEmpty())
61 return;
62
63 m_text1 = Text::create(document(), WTFMove(prefixText));
64 ASSERT(m_text1);
65 document().markers().copyMarkers(m_text2, 0, m_offset, *m_text1, 0);
66
67 insertText1AndTrimText2();
68}
69
70void SplitTextNodeCommand::doUnapply()
71{
72 if (!m_text1 || !m_text1->hasEditableStyle())
73 return;
74
75 ASSERT(&m_text1->document() == &document());
76
77 String prefixText = m_text1->data();
78
79 m_text2->insertData(0, prefixText);
80
81 document().markers().copyMarkers(*m_text1, 0, prefixText.length(), m_text2, 0);
82 m_text1->remove();
83}
84
85void SplitTextNodeCommand::doReapply()
86{
87 if (!m_text1)
88 return;
89
90 ContainerNode* parent = m_text2->parentNode();
91 if (!parent || !parent->hasEditableStyle())
92 return;
93
94 insertText1AndTrimText2();
95}
96
97void SplitTextNodeCommand::insertText1AndTrimText2()
98{
99 if (m_text2->parentNode()->insertBefore(*m_text1, m_text2.ptr()).hasException())
100 return;
101 m_text2->deleteData(0, m_offset);
102}
103
104#ifndef NDEBUG
105
106void SplitTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
107{
108 addNodeAndDescendants(m_text1.get(), nodes);
109 addNodeAndDescendants(m_text2.ptr(), nodes);
110}
111
112#endif
113
114} // namespace WebCore
115