1/*
2 * Copyright (C) 2019 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "CustomUndoStep.h"
28
29#include "Document.h"
30#include "UndoItem.h"
31#include "UndoManager.h"
32#include "VoidCallback.h"
33
34namespace WebCore {
35
36CustomUndoStep::CustomUndoStep(UndoItem& item)
37 : m_undoItem(makeWeakPtr(item))
38{
39}
40
41void CustomUndoStep::unapply()
42{
43 if (!isValid())
44 return;
45
46 // FIXME: It's currently unclear how input events should be dispatched when unapplying or reapplying custom
47 // edit commands. Should the page be allowed to specify a target in the DOM for undo and redo?
48 Ref<UndoItem> protectedUndoItem(*m_undoItem);
49 protectedUndoItem->document()->updateLayoutIgnorePendingStylesheets();
50 protectedUndoItem->undoHandler().handleEvent();
51}
52
53void CustomUndoStep::reapply()
54{
55 if (!isValid())
56 return;
57
58 Ref<UndoItem> protectedUndoItem(*m_undoItem);
59 protectedUndoItem->document()->updateLayoutIgnorePendingStylesheets();
60 protectedUndoItem->redoHandler().handleEvent();
61}
62
63bool CustomUndoStep::isValid() const
64{
65 return m_undoItem && m_undoItem->isValid();
66}
67
68String CustomUndoStep::label() const
69{
70 if (!isValid()) {
71 ASSERT_NOT_REACHED();
72 return emptyString();
73 }
74 return m_undoItem->label();
75}
76
77void CustomUndoStep::didRemoveFromUndoManager()
78{
79 if (auto undoItem = std::exchange(m_undoItem, nullptr))
80 undoItem->invalidate();
81}
82
83} // namespace WebCore
84