1 /*
2  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public License
17  * along with this library; see the file COPYING.LIB.  If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  */
21 
22 #ifndef SVGAnimatedPropertyDescription_h
23 #define SVGAnimatedPropertyDescription_h
24 
25 #if ENABLE(SVG)
26 #include <wtf/HashMap.h>
27 #include <wtf/text/AtomicString.h>
28 
29 namespace WebCore {
30 
31 class SVGElement;
32 
33 struct SVGAnimatedPropertyDescription {
34     // Empty value
SVGAnimatedPropertyDescriptionSVGAnimatedPropertyDescription35     SVGAnimatedPropertyDescription()
36         : m_element(0)
37         , m_attributeName(0)
38     {
39     }
40 
41     // Deleted value
SVGAnimatedPropertyDescriptionSVGAnimatedPropertyDescription42     SVGAnimatedPropertyDescription(WTF::HashTableDeletedValueType)
43         : m_element(reinterpret_cast<SVGElement*>(-1))
44     {
45     }
46 
isHashTableDeletedValueSVGAnimatedPropertyDescription47     bool isHashTableDeletedValue() const
48     {
49         return m_element == reinterpret_cast<SVGElement*>(-1);
50     }
51 
SVGAnimatedPropertyDescriptionSVGAnimatedPropertyDescription52     SVGAnimatedPropertyDescription(SVGElement* element, const AtomicString& attributeName)
53         : m_element(element)
54         , m_attributeName(attributeName.impl())
55     {
56         ASSERT(m_element);
57         ASSERT(m_attributeName);
58     }
59 
60     bool operator==(const SVGAnimatedPropertyDescription& other) const
61     {
62         return m_element == other.m_element && m_attributeName == other.m_attributeName;
63     }
64 
65     SVGElement* m_element;
66     AtomicStringImpl* m_attributeName;
67 };
68 
69 struct SVGAnimatedPropertyDescriptionHash {
hashSVGAnimatedPropertyDescriptionHash70     static unsigned hash(const SVGAnimatedPropertyDescription& key)
71     {
72         return StringHasher::hashMemory<sizeof(SVGAnimatedPropertyDescription)>(&key);
73     }
74 
equalSVGAnimatedPropertyDescriptionHash75     static bool equal(const SVGAnimatedPropertyDescription& a, const SVGAnimatedPropertyDescription& b)
76     {
77         return a == b;
78     }
79 
80     static const bool safeToCompareToEmptyOrDeleted = true;
81 };
82 
83 struct SVGAnimatedPropertyDescriptionHashTraits : WTF::SimpleClassHashTraits<SVGAnimatedPropertyDescription> { };
84 
85 }
86 
87 #endif // ENABLE(SVG)
88 #endif // SVGAnimatedPropertyDescription_h
89