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 "ExceptionOr.h" |
29 | #include <wtf/IsoMalloc.h> |
30 | #include <wtf/Ref.h> |
31 | #include <wtf/RefCounted.h> |
32 | #include <wtf/RefPtr.h> |
33 | #include <wtf/WeakPtr.h> |
34 | |
35 | namespace WebCore { |
36 | |
37 | class Document; |
38 | class UndoItem; |
39 | |
40 | class UndoManager : public RefCounted<UndoManager>, public CanMakeWeakPtr<UndoManager> { |
41 | WTF_MAKE_ISO_ALLOCATED(UndoManager); |
42 | public: |
43 | static Ref<UndoManager> create(Document& document) |
44 | { |
45 | return adoptRef(*new UndoManager(document)); |
46 | } |
47 | |
48 | ~UndoManager(); |
49 | |
50 | void removeItem(UndoItem&); |
51 | void removeAllItems(); |
52 | ExceptionOr<void> addItem(Ref<UndoItem>&&); |
53 | Document& document() { return m_document; } |
54 | |
55 | private: |
56 | UndoManager(Document&); |
57 | |
58 | Document& m_document; |
59 | HashSet<RefPtr<UndoItem>> m_items; |
60 | }; |
61 | |
62 | } // namespace WebCore |
63 | |