js/xpconnect/wrappers/FilteringWrapper.h
author Daosheng Mu <daoshengmu@gmail.com>
Thu, 08 Dec 2016 13:00:44 -1000
changeset 326319 8003accbf0a8664721ca9cfd28d62ab35d633163
parent 325130 5f494ff3b83be2b5e8529e859d80ca3efacf19f7
child 332315 47f366b5d46762ca0aae2aab12adeb1f1a4a05a0
permissions -rw-r--r--
Bug 1315896 - Part 2: Remove MOZ_GAMEPAD in Gamepad module; r=ted.mielczarek MozReview-Commit-ID: Hbv6THaI5Rk

/* -*- 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 __FilteringWrapper_h__
#define __FilteringWrapper_h__

#include "XrayWrapper.h"
#include "mozilla/Attributes.h"
#include "jswrapper.h"
#include "js/CallNonGenericMethod.h"

namespace JS {
class AutoIdVector;
} // namespace JS

namespace xpc {

template <typename Base, typename Policy>
class FilteringWrapper : public Base {
  public:
    constexpr explicit FilteringWrapper(unsigned flags) : Base(flags) {}

    virtual bool enter(JSContext* cx, JS::Handle<JSObject*> wrapper, JS::Handle<jsid> id,
                       js::Wrapper::Action act, bool* bp) const override;

    virtual bool getOwnPropertyDescriptor(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                          JS::Handle<jsid> id,
                                          JS::MutableHandle<JS::PropertyDescriptor> desc) const override;
    virtual bool ownPropertyKeys(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                 JS::AutoIdVector& props) const override;

    virtual bool getPropertyDescriptor(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                       JS::Handle<jsid> id,
                                       JS::MutableHandle<JS::PropertyDescriptor> desc) const override;
    virtual bool getOwnEnumerablePropertyKeys(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                              JS::AutoIdVector& props) const override;
    virtual bool enumerate(JSContext* cx, JS::Handle<JSObject*> wrapper,
                           JS::MutableHandle<JSObject*> objp) const override;

    virtual bool call(JSContext* cx, JS::Handle<JSObject*> wrapper,
                      const JS::CallArgs& args) const override;
    virtual bool construct(JSContext* cx, JS::Handle<JSObject*> wrapper,
                           const JS::CallArgs& args) const override;

    virtual bool nativeCall(JSContext* cx, JS::IsAcceptableThis test, JS::NativeImpl impl,
                            const JS::CallArgs& args) const override;

    virtual bool getPrototype(JSContext* cx, JS::HandleObject wrapper,
                              JS::MutableHandleObject protop) const override;

    static const FilteringWrapper singleton;
};

/*
 * The HTML5 spec mandates very particular object behavior for cross-origin DOM
 * objects (Window and Location), some of which runs contrary to the way that
 * other XrayWrappers behave. We use this class to implement those semantics.
 */
class CrossOriginXrayWrapper : public SecurityXrayDOM {
  public:
    constexpr explicit CrossOriginXrayWrapper(unsigned flags) :
      SecurityXrayDOM(flags) {}


    virtual bool getOwnPropertyDescriptor(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                          JS::Handle<jsid> id,
                                          JS::MutableHandle<JS::PropertyDescriptor> desc) const override;
    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 ownPropertyKeys(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                 JS::AutoIdVector& props) const override;
    virtual bool delete_(JSContext* cx, JS::Handle<JSObject*> wrapper,
                         JS::Handle<jsid> id, JS::ObjectOpResult& result) const override;

    virtual bool getPropertyDescriptor(JSContext* cx, JS::Handle<JSObject*> wrapper,
                                       JS::Handle<jsid> id,
                                       JS::MutableHandle<JS::PropertyDescriptor> desc) const override;
};

// Check whether the given jsid is a symbol whose value can be gotten
// cross-origin.  Cross-origin gets always return undefined as the value.
bool IsCrossOriginWhitelistedSymbol(JSContext* cx, JS::HandleId id);

} // namespace xpc

#endif /* __FilteringWrapper_h__ */