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 | |
31 | namespace 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 | |