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#pragma once
27
28#include "VoidCallback.h"
29#include <wtf/IsoMalloc.h>
30#include <wtf/RefCounted.h>
31#include <wtf/WeakPtr.h>
32#include <wtf/text/WTFString.h>
33
34namespace WebCore {
35
36class Document;
37class UndoManager;
38
39class UndoItem : public RefCounted<UndoItem>, public CanMakeWeakPtr<UndoItem> {
40 WTF_MAKE_ISO_ALLOCATED(UndoItem);
41public:
42 struct Init {
43 String label;
44 RefPtr<VoidCallback> undo;
45 RefPtr<VoidCallback> redo;
46 };
47
48 static Ref<UndoItem> create(Init&& init)
49 {
50 return adoptRef(*new UndoItem(WTFMove(init)));
51 }
52
53 bool isValid() const;
54 void invalidate();
55
56 Document* document() const;
57
58 UndoManager* undoManager() const { return m_undoManager.get(); }
59 void setUndoManager(UndoManager*);
60
61 const String& label() const { return m_label; }
62 VoidCallback& undoHandler() const { return m_undoHandler.get(); }
63 VoidCallback& redoHandler() const { return m_redoHandler.get(); }
64
65private:
66 UndoItem(Init&& init)
67 : m_label(WTFMove(init.label))
68 , m_undoHandler(init.undo.releaseNonNull())
69 , m_redoHandler(init.redo.releaseNonNull())
70 {
71 }
72
73 String m_label;
74 Ref<VoidCallback> m_undoHandler;
75 Ref<VoidCallback> m_redoHandler;
76 WeakPtr<UndoManager> m_undoManager;
77};
78
79} // namespace WebCore
80