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 "AXObjectCache.h"
30 #include "Text.h"
31
32 namespace WebCore {
33
DeleteFromTextNodeCommand(PassRefPtr<Text> node,unsigned offset,unsigned count)34 DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(PassRefPtr<Text> node, unsigned offset, unsigned count)
35 : SimpleEditCommand(node->document())
36 , m_node(node)
37 , m_offset(offset)
38 , m_count(count)
39 {
40 ASSERT(m_node);
41 ASSERT(m_offset <= m_node->length());
42 ASSERT(m_offset + m_count <= m_node->length());
43 }
44
doApply()45 void DeleteFromTextNodeCommand::doApply()
46 {
47 ASSERT(m_node);
48
49 if (!m_node->rendererIsEditable())
50 return;
51
52 ExceptionCode ec = 0;
53 m_text = m_node->substringData(m_offset, m_count, ec);
54 if (ec)
55 return;
56
57 // Need to notify this before actually deleting the text
58 if (AXObjectCache::accessibilityEnabled())
59 document()->axObjectCache()->nodeTextChangeNotification(m_node->renderer(), AXObjectCache::AXTextDeleted, m_offset, m_count);
60
61 m_node->deleteData(m_offset, m_count, ec);
62 }
63
doUnapply()64 void DeleteFromTextNodeCommand::doUnapply()
65 {
66 ASSERT(m_node);
67
68 if (!m_node->rendererIsEditable())
69 return;
70
71 ExceptionCode ec;
72 m_node->insertData(m_offset, m_text, ec);
73
74 if (AXObjectCache::accessibilityEnabled())
75 document()->axObjectCache()->nodeTextChangeNotification(m_node->renderer(), AXObjectCache::AXTextInserted, m_offset, m_count);
76 }
77
78 } // namespace WebCore
79