1/*
2 * Copyright (C) 2009 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 PropertyDescriptor_h
27#define PropertyDescriptor_h
28
29#include "JSValue.h"
30
31namespace JSC {
32 class PropertyDescriptor {
33 public:
34 PropertyDescriptor()
35 : m_attributes(defaultAttributes)
36 , m_seenAttributes(0)
37 {
38 }
39 bool writable() const;
40 bool enumerable() const;
41 bool configurable() const;
42 bool isDataDescriptor() const;
43 bool isGenericDescriptor() const;
44 bool isAccessorDescriptor() const;
45 unsigned attributes() const { return m_attributes; }
46 JSValue value() const { return m_value; }
47 JSValue getter() const;
48 JSValue setter() const;
49 void setUndefined();
50 void setDescriptor(JSValue value, unsigned attributes);
51 void setAccessorDescriptor(JSValue getter, JSValue setter, unsigned attributes);
52 void setWritable(bool);
53 void setEnumerable(bool);
54 void setConfigurable(bool);
55 void setValue(JSValue value) { m_value = value; }
56 void setSetter(JSValue);
57 void setGetter(JSValue);
58 bool isEmpty() const { return !(m_value || m_getter || m_setter || m_seenAttributes); }
59 bool writablePresent() const { return m_seenAttributes & WritablePresent; }
60 bool enumerablePresent() const { return m_seenAttributes & EnumerablePresent; }
61 bool configurablePresent() const { return m_seenAttributes & ConfigurablePresent; }
62 bool setterPresent() const { return m_setter; }
63 bool getterPresent() const { return m_getter; }
64 bool equalTo(ExecState* exec, const PropertyDescriptor& other) const;
65 bool attributesEqual(const PropertyDescriptor& other) const;
66 unsigned attributesWithOverride(const PropertyDescriptor& other) const;
67 private:
68 static unsigned defaultAttributes;
69 bool operator==(const PropertyDescriptor&){ return false; }
70 enum { WritablePresent = 1, EnumerablePresent = 2, ConfigurablePresent = 4};
71 // May be a getter/setter
72 JSValue m_value;
73 JSValue m_getter;
74 JSValue m_setter;
75 unsigned m_attributes;
76 unsigned m_seenAttributes;
77 };
78}
79
80#endif
81