js/xpconnect/wrappers/ChromeObjectWrapper.h
author Morris Tseng <mtseng@mozilla.com>
Mon, 12 Sep 2016 17:39:54 +0800
changeset 313517 d85736dec5d0d1c605d471b53decef714b3b4074
parent 304308 96875d7ae6f2f4cb0f56cd872eaae90345933563
child 380156 0a058c19c23507038bf2a1c830ddc34ca90fb578
permissions -rw-r--r--
Bug 1297965 - Use ANGLE for WebGL2. r=jgilbert MozReview-Commit-ID: 83zhQ5rTdbi

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=99: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __ChromeObjectWrapper_h__
#define __ChromeObjectWrapper_h__

#include "mozilla/Attributes.h"

#include "FilteringWrapper.h"

namespace xpc {

struct ExposedPropertiesOnly;

// When a vanilla chrome JS object is exposed to content, we use a wrapper that
// supports __exposedProps__ for legacy reasons. For extra security, we override
// the traps that allow content to pass an object to chrome, and perform extra
// security checks on them.
#define ChromeObjectWrapperBase \
  FilteringWrapper<js::CrossCompartmentSecurityWrapper, ExposedPropertiesOnly>

class ChromeObjectWrapper : public ChromeObjectWrapperBase
{
  public:
    constexpr ChromeObjectWrapper() : ChromeObjectWrapperBase(0) {}

    virtual bool defineProperty(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                JS::Handle<jsid> id,
                                JS::Handle<JS::PropertyDescriptor> desc,
                                JS::ObjectOpResult& result) const override;
    virtual bool set(JSContext* cx, JS::HandleObject wrapper, JS::HandleId id,
                     JS::HandleValue v, JS::HandleValue receiver,
                     JS::ObjectOpResult& result) const override;

    static const ChromeObjectWrapper singleton;
};

} /* namespace xpc */

#endif /* __ChromeObjectWrapper_h__ */