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 "DeleteFromTextNodeCommand.h"
28
29#include "Text.h"
30
31namespace WebCore {
32
33DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(PassRefPtr<Text> node, unsigned offset, unsigned count)
34    : SimpleEditCommand(node->document())
35    , m_node(node)
36    , m_offset(offset)
37    , m_count(count)
38{
39    ASSERT(m_node);
40    ASSERT(m_offset <= m_node->length());
41    ASSERT(m_offset + m_count <= m_node->length());
42}
43
44void DeleteFromTextNodeCommand::doApply()
45{
46    ASSERT(m_node);
47
48    if (!m_node->isContentEditable())
49        return;
50
51    ExceptionCode ec = 0;
52    m_text = m_node->substringData(m_offset, m_count, ec);
53    if (ec)
54        return;
55
56    m_node->deleteData(m_offset, m_count, ec);
57}
58
59void DeleteFromTextNodeCommand::doUnapply()
60{
61    ASSERT(m_node);
62
63    if (!m_node->isContentEditable())
64        return;
65
66    ExceptionCode ec;
67    m_node->insertData(m_offset, m_text, ec);
68}
69
70} // namespace WebCore
71