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
30namespace WebCore {
31
32class ElementIteratorAssertions {
33public:
34 ElementIteratorAssertions(const Node* first = nullptr);
35 bool domTreeHasMutated() const;
36 void dropEventDispatchAssertion();
37 void clear();
38
39private:
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
47inline 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
55inline bool ElementIteratorAssertions::domTreeHasMutated() const
56{
57 return m_document && m_document->domTreeVersion() != m_initialDOMTreeVersion;
58}
59
60inline void ElementIteratorAssertions::dropEventDispatchAssertion()
61{
62 m_eventDispatchAssertion = WTF::nullopt;
63}
64
65inline void ElementIteratorAssertions::clear()
66{
67 m_document = nullptr;
68 m_initialDOMTreeVersion = 0;
69 m_eventDispatchAssertion = WTF::nullopt;
70}
71
72} // namespace WebCore
73