1/*
2 * Copyright (C) 2016 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 "Element.h"
29#include <wtf/Vector.h>
30
31namespace WebCore {
32
33class DocumentRuleSets;
34class RuleSet;
35class SpaceSplitString;
36struct InvalidationRuleSet;
37
38namespace Style {
39
40class ClassChangeInvalidation {
41public:
42 ClassChangeInvalidation(Element&, const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses);
43 ~ClassChangeInvalidation();
44
45private:
46 void computeInvalidation(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses);
47 void invalidateStyleWithRuleSets();
48
49 const bool m_isEnabled;
50 Element& m_element;
51
52 Vector<const InvalidationRuleSet*, 4> m_invalidationRuleSets;
53};
54
55inline ClassChangeInvalidation::ClassChangeInvalidation(Element& element, const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses)
56 : m_isEnabled(element.needsStyleInvalidation())
57 , m_element(element)
58
59{
60 if (!m_isEnabled)
61 return;
62 computeInvalidation(oldClasses, newClasses);
63 invalidateStyleWithRuleSets();
64}
65
66inline ClassChangeInvalidation::~ClassChangeInvalidation()
67{
68 if (!m_isEnabled)
69 return;
70 invalidateStyleWithRuleSets();
71}
72
73}
74}
75