1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/xpconnect/wrappers/ChromeObjectWrapper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,59 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* vim: set ts=8 sts=4 et sw=4 tw=99: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef __ChromeObjectWrapper_h__
1.11 +#define __ChromeObjectWrapper_h__
1.12 +
1.13 +#include "mozilla/Attributes.h"
1.14 +
1.15 +#include "FilteringWrapper.h"
1.16 +
1.17 +namespace xpc {
1.18 +
1.19 +struct ExposedPropertiesOnly;
1.20 +
1.21 +// When chrome JS objects are exposed to content, they get a ChromeObjectWrapper.
1.22 +//
1.23 +// The base filtering wrapper here does most of the work for us. We define a
1.24 +// custom class here to introduce custom behavior with respect to the prototype
1.25 +// chain.
1.26 +#define ChromeObjectWrapperBase \
1.27 + FilteringWrapper<js::CrossCompartmentSecurityWrapper, ExposedPropertiesOnly>
1.28 +
1.29 +class ChromeObjectWrapper : public ChromeObjectWrapperBase
1.30 +{
1.31 + public:
1.32 + ChromeObjectWrapper() : ChromeObjectWrapperBase(0) {}
1.33 +
1.34 + /* Custom traps. */
1.35 + virtual bool getPropertyDescriptor(JSContext *cx, JS::Handle<JSObject*> wrapper,
1.36 + JS::Handle<jsid> id,
1.37 + JS::MutableHandle<JSPropertyDescriptor> desc) MOZ_OVERRIDE;
1.38 + virtual bool has(JSContext *cx, JS::Handle<JSObject*> wrapper,
1.39 + JS::Handle<jsid> id, bool *bp) MOZ_OVERRIDE;
1.40 + virtual bool get(JSContext *cx, JS::Handle<JSObject*> wrapper, JS::Handle<JSObject*> receiver,
1.41 + JS::Handle<jsid> id, JS::MutableHandle<JS::Value> vp) MOZ_OVERRIDE;
1.42 +
1.43 + virtual bool objectClassIs(JS::Handle<JSObject*> obj, js::ESClassValue classValue,
1.44 + JSContext *cx) MOZ_OVERRIDE;
1.45 +
1.46 + virtual bool enter(JSContext *cx, JS::Handle<JSObject*> wrapper, JS::Handle<jsid> id,
1.47 + js::Wrapper::Action act, bool *bp) MOZ_OVERRIDE;
1.48 +
1.49 + // NB: One might think we'd need to implement enumerate(), keys(), iterate(),
1.50 + // and getPropertyNames() here. However, ES5 built-in properties aren't
1.51 + // enumerable (and SpiderMonkey's implementation seems to match the spec
1.52 + // modulo Error.prototype.fileName and Error.prototype.lineNumber). Since
1.53 + // we're only remapping the prototypes of standard objects, there would
1.54 + // never be anything more to enumerate up the prototype chain. So we can
1.55 + // atually skip these.
1.56 +
1.57 + static ChromeObjectWrapper singleton;
1.58 +};
1.59 +
1.60 +} /* namespace xpc */
1.61 +
1.62 +#endif /* __ChromeObjectWrapper_h__ */
