1 | /* |
2 | * Copyright (C) 2013-2015 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 | #pragma once |
27 | |
28 | #include "ScriptDisallowedScope.h" |
29 | |
30 | namespace WebCore { |
31 | |
32 | class ElementIteratorAssertions { |
33 | public: |
34 | ElementIteratorAssertions(const Node* first = nullptr); |
35 | bool domTreeHasMutated() const; |
36 | void dropEventDispatchAssertion(); |
37 | void clear(); |
38 | |
39 | private: |
40 | const Document* m_document; |
41 | uint64_t m_initialDOMTreeVersion; |
42 | Optional<ScriptDisallowedScope> m_eventDispatchAssertion; |
43 | }; |
44 | |
45 | // FIXME: No real point in doing these as inlines; they are for debugging and we usually turn off inlining in debug builds. |
46 | |
47 | inline ElementIteratorAssertions::ElementIteratorAssertions(const Node* first) |
48 | : m_document(first ? &first->document() : nullptr) |
49 | , m_initialDOMTreeVersion(first ? m_document->domTreeVersion() : 0) |
50 | { |
51 | if (first) |
52 | m_eventDispatchAssertion = ScriptDisallowedScope(); |
53 | } |
54 | |
55 | inline bool ElementIteratorAssertions::domTreeHasMutated() const |
56 | { |
57 | return m_document && m_document->domTreeVersion() != m_initialDOMTreeVersion; |
58 | } |
59 | |
60 | inline void ElementIteratorAssertions::dropEventDispatchAssertion() |
61 | { |
62 | m_eventDispatchAssertion = WTF::nullopt; |
63 | } |
64 | |
65 | inline void ElementIteratorAssertions::clear() |
66 | { |
67 | m_document = nullptr; |
68 | m_initialDOMTreeVersion = 0; |
69 | m_eventDispatchAssertion = WTF::nullopt; |
70 | } |
71 | |
72 | } // namespace WebCore |
73 | |