1/* 2 * Copyright (C) 2013 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#ifndef ElementIteratorAssertions_h 27#define ElementIteratorAssertions_h 28 29#include "Document.h" 30#include "Element.h" 31 32namespace WebCore { 33 34class ElementIteratorAssertions { 35public: 36 ElementIteratorAssertions(); 37 ElementIteratorAssertions(const Element* first); 38 bool domTreeHasMutated() const; 39 void dropEventDispatchAssertion(); 40 41private: 42 const Document* m_document; 43 uint64_t m_initialDOMTreeVersion; 44 OwnPtr<NoEventDispatchAssertion> m_noEventDispatchAssertion; 45}; 46 47inline ElementIteratorAssertions::ElementIteratorAssertions() 48 : m_document(nullptr) 49 , m_initialDOMTreeVersion(0) 50{ 51} 52 53inline ElementIteratorAssertions::ElementIteratorAssertions(const Element* first) 54 : m_document(first ? &first->document() : nullptr) 55 , m_initialDOMTreeVersion(m_document ? m_document->domTreeVersion() : 0) 56 , m_noEventDispatchAssertion(m_document ? adoptPtr(new NoEventDispatchAssertion) : nullptr) 57{ 58} 59 60inline bool ElementIteratorAssertions::domTreeHasMutated() const 61{ 62 return m_initialDOMTreeVersion && m_document && m_document->domTreeVersion() != m_initialDOMTreeVersion; 63} 64 65inline void ElementIteratorAssertions::dropEventDispatchAssertion() 66{ 67 m_noEventDispatchAssertion = nullptr; 68} 69 70} 71 72#endif 73