1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : * vim: set ts=4 sw=4 et tw=99 ft=cpp:
3 : *
4 : * ***** BEGIN LICENSE BLOCK *****
5 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 : *
7 : * The contents of this file are subject to the Mozilla Public License Version
8 : * 1.1 (the "License"); you may not use this file except in compliance with
9 : * the License. You may obtain a copy of the License at
10 : * http://www.mozilla.org/MPL/
11 : *
12 : * Software distributed under the License is distributed on an "AS IS" basis,
13 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 : * for the specific language governing rights and limitations under the
15 : * License.
16 : *
17 : * The Original Code is mozilla.org code, released
18 : * June 24, 2010.
19 : *
20 : * The Initial Developer of the Original Code is
21 : * The Mozilla Foundation
22 : *
23 : * Contributor(s):
24 : * Andreas Gal <gal@mozilla.com>
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either of the GNU General Public License Version 2 or later (the "GPL"),
28 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
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33 : * decision by deleting the provisions above and replace them with the notice
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35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #include "jsapi.h"
41 : #include "jswrapper.h"
42 :
43 : // Xray wrappers re-resolve the original native properties on the native
44 : // object and always directly access to those properties.
45 : // Because they work so differently from the rest of the wrapper hierarchy,
46 : // we pull them out of the Wrapper inheritance hierarchy and create a
47 : // little world around them.
48 :
49 : namespace xpc {
50 :
51 : namespace XrayUtils {
52 :
53 : extern JSClass HolderClass;
54 :
55 : bool
56 : IsTransparent(JSContext *cx, JSObject *wrapper);
57 :
58 : JSObject *
59 : GetNativePropertiesObject(JSContext *cx, JSObject *wrapper);
60 :
61 : }
62 :
63 : // NB: Base *must* derive from JSProxyHandler
64 : template <typename Base>
65 : class XrayWrapper : public Base {
66 : public:
67 4392 : XrayWrapper(unsigned flags);
68 4461 : virtual ~XrayWrapper();
69 :
70 : /* Fundamental proxy traps. */
71 0 : virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
72 : bool set, js::PropertyDescriptor *desc);
73 0 : virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
74 : bool set, js::PropertyDescriptor *desc);
75 0 : virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
76 : js::PropertyDescriptor *desc);
77 0 : virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper,
78 : js::AutoIdVector &props);
79 0 : virtual bool delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
80 0 : virtual bool enumerate(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
81 0 : virtual bool fix(JSContext *cx, JSObject *proxy, js::Value *vp);
82 :
83 : /* Derived proxy traps. */
84 0 : virtual bool get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id,
85 : js::Value *vp);
86 0 : virtual bool set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id,
87 : bool strict, js::Value *vp);
88 0 : virtual bool has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
89 0 : virtual bool hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
90 0 : virtual bool keys(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
91 0 : virtual bool iterate(JSContext *cx, JSObject *wrapper, unsigned flags, js::Value *vp);
92 :
93 0 : virtual bool call(JSContext *cx, JSObject *wrapper, unsigned argc, js::Value *vp);
94 0 : virtual bool construct(JSContext *cx, JSObject *wrapper,
95 : unsigned argc, js::Value *argv, js::Value *rval);
96 :
97 0 : static JSObject *createHolder(JSContext *cx, JSObject *wrappedNative, JSObject *parent);
98 :
99 : static XrayWrapper singleton;
100 :
101 : private:
102 0 : bool resolveOwnProperty(JSContext *cx, JSObject *wrapper, jsid id, bool set,
103 : js::PropertyDescriptor *desc);
104 : };
105 :
106 : class XrayProxy : public XrayWrapper<js::CrossCompartmentWrapper> {
107 : public:
108 : XrayProxy(unsigned flags);
109 : virtual ~XrayProxy();
110 :
111 : virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
112 : bool set, js::PropertyDescriptor *desc);
113 : virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
114 : bool set, js::PropertyDescriptor *desc);
115 : virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
116 : js::PropertyDescriptor *desc);
117 : virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper,
118 : js::AutoIdVector &props);
119 : virtual bool delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp);
120 : virtual bool enumerate(JSContext *cx, JSObject *wrapper, js::AutoIdVector &props);
121 : // XrayWrapper's fix implementation works for us.
122 :
123 : static XrayProxy singleton;
124 : };
125 :
126 : }
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