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54 lines
2.0 KiB
C++
54 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=4 sw=4 et tw=99 ft=cpp:
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __ChromeObjectWrapper_h__
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#define __ChromeObjectWrapper_h__
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#include "mozilla/Attributes.h"
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#include "FilteringWrapper.h"
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#include "AccessCheck.h"
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namespace xpc {
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// When chrome JS objects are exposed to content, they get a ChromeObjectWrapper.
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//
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// The base filtering wrapper here does most of the work for us. We define a
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// custom class here to introduce custom behavior with respect to the prototype
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// chain.
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#define ChromeObjectWrapperBase \
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FilteringWrapper<js::CrossCompartmentSecurityWrapper, ExposedPropertiesOnly>
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class ChromeObjectWrapper : public ChromeObjectWrapperBase
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{
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public:
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ChromeObjectWrapper() : ChromeObjectWrapperBase(0) {}
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/* Custom traps. */
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virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper,
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jsid id, js::PropertyDescriptor *desc,
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unsigned flags) MOZ_OVERRIDE;
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virtual bool has(JSContext *cx, JSObject *wrapper, jsid id,
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bool *bp) MOZ_OVERRIDE;
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virtual bool get(JSContext *cx, JSObject *wrapper, JSObject *receiver,
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jsid id, js::Value *vp) MOZ_OVERRIDE;
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// NB: One might think we'd need to implement enumerate(), keys(), iterate(),
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// and getPropertyNames() here. However, ES5 built-in properties aren't
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// enumerable (and SpiderMonkey's implementation seems to match the spec
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// modulo Error.prototype.fileName and Error.prototype.lineNumber). Since
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// we're only remapping the prototypes of standard objects, there would
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// never be anything more to enumerate up the prototype chain. So we can
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// atually skip these.
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static ChromeObjectWrapper singleton;
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};
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} /* namespace xpc */
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#endif /* __ChromeObjectWrapper_h__ */
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