1 | /* |
2 | * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
3 | * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no) |
4 | * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
5 | * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
6 | * Copyright (C) 2004, 2008, 2009, 2015 Apple Inc. All rights reserved. |
7 | * |
8 | * This library is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU Library General Public |
10 | * License as published by the Free Software Foundation; either |
11 | * version 2 of the License, or (at your option) any later version. |
12 | * |
13 | * This library is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Library General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU Library General Public License |
19 | * along with this library; see the file COPYING.LIB. If not, write to |
20 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | * Boston, MA 02110-1301, USA. |
22 | * |
23 | */ |
24 | |
25 | #pragma once |
26 | |
27 | #include "ActiveDOMCallback.h" |
28 | #include "CallbackResult.h" |
29 | #include <wtf/RefCounted.h> |
30 | |
31 | namespace WebCore { |
32 | |
33 | class Node; |
34 | |
35 | class NodeFilter : public RefCounted<NodeFilter>, public ActiveDOMCallback { |
36 | public: |
37 | using ActiveDOMCallback::ActiveDOMCallback; |
38 | |
39 | virtual CallbackResult<unsigned short> acceptNode(Node&) = 0; |
40 | |
41 | virtual bool hasCallback() const = 0; |
42 | |
43 | /* |
44 | * The following constants are returned by the acceptNode() |
45 | * method: |
46 | */ |
47 | enum { |
48 | FILTER_ACCEPT = 1, |
49 | FILTER_REJECT = 2, |
50 | FILTER_SKIP = 3 |
51 | }; |
52 | |
53 | /* |
54 | * These are the available values for the whatToShow parameter. |
55 | * They are the same as the set of possible types for Node, and |
56 | * their values are derived by using a bit position corresponding |
57 | * to the value of NodeType for the equivalent node type. |
58 | */ |
59 | enum : unsigned long { |
60 | SHOW_ALL = 0xFFFFFFFF, |
61 | SHOW_ELEMENT = 0x00000001, |
62 | SHOW_ATTRIBUTE = 0x00000002, |
63 | SHOW_TEXT = 0x00000004, |
64 | SHOW_CDATA_SECTION = 0x00000008, |
65 | SHOW_ENTITY_REFERENCE = 0x00000010, |
66 | SHOW_ENTITY = 0x00000020, |
67 | SHOW_PROCESSING_INSTRUCTION = 0x00000040, |
68 | = 0x00000080, |
69 | SHOW_DOCUMENT = 0x00000100, |
70 | SHOW_DOCUMENT_TYPE = 0x00000200, |
71 | SHOW_DOCUMENT_FRAGMENT = 0x00000400, |
72 | SHOW_NOTATION = 0x00000800 |
73 | }; |
74 | }; |
75 | |
76 | } // namespace WebCore |
77 | |