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 "DeleteFromTextNodeCommand.h"
28#include "Document.h"
29#include "ExceptionCodePlaceholder.h"
30
31#include "AXObjectCache.h"
32#include "Text.h"
33
34namespace WebCore {
35
36DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(PassRefPtr<Text> node, unsigned offset, unsigned count)
37    : SimpleEditCommand(node->document())
38    , m_node(node)
39    , m_offset(offset)
40    , m_count(count)
41{
42    ASSERT(m_node);
43    ASSERT(m_offset <= m_node->length());
44    ASSERT(m_offset + m_count <= m_node->length());
45}
46
47void DeleteFromTextNodeCommand::doApply()
48{
49    ASSERT(m_node);
50
51    if (!m_node->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable))
52        return;
53
54    ExceptionCode ec = 0;
55    m_text = m_node->substringData(m_offset, m_count, ec);
56    if (ec)
57        return;
58
59    // Need to notify this before actually deleting the text
60    if (AXObjectCache* cache = document().existingAXObjectCache())
61        cache->nodeTextChangeNotification(m_node.get(), AXObjectCache::AXTextDeleted, m_offset, m_text);
62
63    m_node->deleteData(m_offset, m_count, ec);
64}
65
66void DeleteFromTextNodeCommand::doUnapply()
67{
68    ASSERT(m_node);
69
70    if (!m_node->hasEditableStyle())
71        return;
72
73    m_node->insertData(m_offset, m_text, IGNORE_EXCEPTION);
74
75    if (AXObjectCache* cache = document().existingAXObjectCache())
76        cache->nodeTextChangeNotification(m_node.get(), AXObjectCache::AXTextInserted, m_offset, m_text);
77}
78
79#ifndef NDEBUG
80void DeleteFromTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
81{
82    addNodeAndDescendants(m_node.get(), nodes);
83}
84#endif
85
86} // namespace WebCore
87