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. ``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 "CSSStyleDeclaration.h"
29#include "CSSValue.h"
30#include "ExceptionOr.h"
31#include <wtf/Ref.h>
32#include <wtf/RefCounted.h>
33#include <wtf/TypeCasts.h>
34#include <wtf/WeakPtr.h>
35#include <wtf/text/WTFString.h>
36
37namespace WebCore {
38
39class DeprecatedCSSOMValue : public RefCounted<DeprecatedCSSOMValue>, public CanMakeWeakPtr<DeprecatedCSSOMValue> {
40public:
41 // Exactly match the IDL. No reason to add anything if it's not in the IDL.
42 enum Type {
43 CSS_INHERIT = 0,
44 CSS_PRIMITIVE_VALUE = 1,
45 CSS_VALUE_LIST = 2,
46 CSS_CUSTOM = 3
47 };
48
49 // Override RefCounted's deref() to ensure operator delete is called on
50 // the appropriate subclass type.
51 void deref()
52 {
53 if (derefBase())
54 destroy();
55 }
56
57 WEBCORE_EXPORT unsigned cssValueType() const;
58
59 WEBCORE_EXPORT String cssText() const;
60 ExceptionOr<void> setCssText(const String&) { return { }; } // Will never implement.
61
62 bool isComplexValue() const { return m_classType == DeprecatedComplexValueClass; }
63 bool isPrimitiveValue() const { return m_classType == DeprecatedPrimitiveValueClass; }
64 bool isValueList() const { return m_classType == DeprecatedValueListClass; }
65
66 CSSStyleDeclaration& owner() const { return m_owner; }
67
68protected:
69 static const size_t ClassTypeBits = 2;
70 enum DeprecatedClassType {
71 DeprecatedComplexValueClass,
72 DeprecatedPrimitiveValueClass,
73 DeprecatedValueListClass
74 };
75
76 DeprecatedClassType classType() const { return static_cast<DeprecatedClassType>(m_classType); }
77
78 DeprecatedCSSOMValue(DeprecatedClassType classType, CSSStyleDeclaration& owner)
79 : m_classType(classType)
80 , m_owner(owner)
81 {
82 }
83
84 // NOTE: This class is non-virtual for memory and performance reasons.
85 // Don't go making it virtual again unless you know exactly what you're doing!
86 ~DeprecatedCSSOMValue() = default;
87
88private:
89 WEBCORE_EXPORT void destroy();
90
91protected:
92 unsigned m_valueListSeparator : CSSValue::ValueListSeparatorBits;
93 unsigned m_classType : ClassTypeBits; // ClassType
94
95 Ref<CSSStyleDeclaration> m_owner;
96};
97
98class DeprecatedCSSOMComplexValue : public DeprecatedCSSOMValue {
99public:
100 static Ref<DeprecatedCSSOMComplexValue> create(const CSSValue& value, CSSStyleDeclaration& owner)
101 {
102 return adoptRef(*new DeprecatedCSSOMComplexValue(value, owner));
103 }
104
105 String cssText() const { return m_value->cssText(); }
106
107 unsigned cssValueType() const { return m_value->cssValueType(); }
108
109protected:
110 DeprecatedCSSOMComplexValue(const CSSValue& value, CSSStyleDeclaration& owner)
111 : DeprecatedCSSOMValue(DeprecatedComplexValueClass, owner)
112 , m_value(const_cast<CSSValue&>(value))
113 {
114 }
115
116private:
117 Ref<CSSValue> m_value;
118};
119
120} // namespace WebCore
121
122#define SPECIALIZE_TYPE_TRAITS_CSSOM_VALUE(ToValueTypeName, predicate) \
123SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
124static bool isType(const WebCore::DeprecatedCSSOMValue& value) { return value.predicate; } \
125SPECIALIZE_TYPE_TRAITS_END()
126
127SPECIALIZE_TYPE_TRAITS_CSSOM_VALUE(DeprecatedCSSOMComplexValue, isComplexValue())
128
129
130