gecko-dev/js/ipc/WrapperOwner.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sw=4 et tw=80:
 *
 * 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 mozilla_jsipc_WrapperOwner_h__
#define mozilla_jsipc_WrapperOwner_h__

#include "JavaScriptShared.h"
#include "mozilla/ipc/ProtocolUtils.h"
#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
#include "js/Class.h"
#include "js/Proxy.h"

namespace mozilla {
namespace jsipc {

class WrapperOwner : public virtual JavaScriptShared
{
  public:
    typedef mozilla::ipc::IProtocol::ActorDestroyReason
           ActorDestroyReason;

    WrapperOwner();
    bool init();

    // Standard internal methods.
    // (The traps should be in the same order like js/Proxy.h)
    bool getOwnPropertyDescriptor(JSContext* cx, JS::HandleObject proxy, JS::HandleId id,
                                  JS::MutableHandle<JS::PropertyDescriptor> desc);
    bool defineProperty(JSContext* cx, JS::HandleObject proxy, JS::HandleId id,
                        JS::Handle<JS::PropertyDescriptor> desc,
                        JS::ObjectOpResult& result);
    bool ownPropertyKeys(JSContext* cx, JS::HandleObject proxy, JS::AutoIdVector& props);
    bool delete_(JSContext* cx, JS::HandleObject proxy, JS::HandleId id,
                 JS::ObjectOpResult& result);
    bool preventExtensions(JSContext* cx, JS::HandleObject proxy, JS::ObjectOpResult& result);
    bool isExtensible(JSContext* cx, JS::HandleObject proxy, bool* extensible);
    bool has(JSContext* cx, JS::HandleObject proxy, JS::HandleId id, bool* bp);
    bool get(JSContext* cx, JS::HandleObject proxy, JS::HandleValue receiver,
             JS::HandleId id, JS::MutableHandleValue vp);
    bool set(JSContext* cx, JS::HandleObject proxy, JS::HandleId id, JS::HandleValue v,
             JS::HandleValue receiver, JS::ObjectOpResult& result);
    bool callOrConstruct(JSContext* cx, JS::HandleObject proxy, const JS::CallArgs& args,
                         bool construct);

    // SpiderMonkey extensions.
    bool getPropertyDescriptor(JSContext* cx, JS::HandleObject proxy, JS::HandleId id,
                               JS::MutableHandle<JS::PropertyDescriptor> desc);
    bool hasOwn(JSContext* cx, JS::HandleObject proxy, JS::HandleId id, bool* bp);
    bool getOwnEnumerablePropertyKeys(JSContext* cx, JS::HandleObject proxy,
                                      JS::AutoIdVector& props);
    bool hasInstance(JSContext* cx, JS::HandleObject proxy, JS::MutableHandleValue v, bool* bp);
    bool getBuiltinClass(JSContext* cx, JS::HandleObject proxy, js::ESClass* cls);
    bool isArray(JSContext* cx, JS::HandleObject proxy, JS::IsArrayAnswer* answer);
    const char* className(JSContext* cx, JS::HandleObject proxy);
    bool getPrototype(JSContext* cx, JS::HandleObject proxy, JS::MutableHandleObject protop);
    bool getPrototypeIfOrdinary(JSContext* cx, JS::HandleObject proxy, bool* isOrdinary,
                                JS::MutableHandleObject protop);

    js::RegExpShared* regexp_toShared(JSContext* cx, JS::HandleObject proxy);

    nsresult instanceOf(JSObject* obj, const nsID* id, bool* bp);

    bool toString(JSContext* cx, JS::HandleObject callee, JS::CallArgs& args);
    bool DOMQI(JSContext* cx, JS::HandleObject callee, JS::CallArgs& args);

    /*
     * Check that |obj| is a DOM wrapper whose prototype chain contains
     * |prototypeID| at depth |depth|.
     */
    bool domInstanceOf(JSContext* cx, JSObject* obj, int prototypeID, int depth, bool* bp);

    bool active() { return !inactive_; }

    virtual bool allowMessage(JSContext* cx) = 0;

    void drop(JSObject* obj);
    void updatePointer(JSObject* obj, const JSObject* old);

    virtual void ActorDestroy(ActorDestroyReason why);

    virtual bool toObjectVariant(JSContext* cx, JSObject* obj, ObjectVariant* objVarp) override;
    virtual JSObject* fromObjectVariant(JSContext* cx, const ObjectVariant& objVar) override;
    JSObject* fromRemoteObjectVariant(JSContext* cx, const RemoteObject& objVar);
    JSObject* fromLocalObjectVariant(JSContext* cx, const LocalObject& objVar);

  protected:
    ObjectId idOf(JSObject* obj);

  private:
    ObjectId idOfUnchecked(JSObject* obj);

    bool getPropertyKeys(JSContext* cx, JS::HandleObject proxy, uint32_t flags,
                         JS::AutoIdVector& props);

    // Catastrophic IPC failure.
    bool ipcfail(JSContext* cx);

    // Check whether a return status is okay, and if not, propagate its error.
    //
    // If 'status' might be a ReturnObjectOpResult, which is only possible for
    // a subset of the operations below, 'result' must be passed.
    bool ok(JSContext* cx, const ReturnStatus& status, JS::ObjectOpResult& result);
    bool ok(JSContext* cx, const ReturnStatus& status);

    bool inactive_;

    /*** Dummy call handlers ***/
  public:
    virtual bool SendDropObject(const ObjectId& objId) = 0;
    virtual bool SendPreventExtensions(const ObjectId& objId, ReturnStatus* rs) = 0;
    virtual bool SendGetPropertyDescriptor(const ObjectId& objId, const JSIDVariant& id,
                                           ReturnStatus* rs,
                                           PPropertyDescriptor* out) = 0;
    virtual bool SendGetOwnPropertyDescriptor(const ObjectId& objId,
                                              const JSIDVariant& id,
                                              ReturnStatus* rs,
                                              PPropertyDescriptor* out) = 0;
    virtual bool SendDefineProperty(const ObjectId& objId, const JSIDVariant& id,
                                    const PPropertyDescriptor& flags,
                                    ReturnStatus* rs) = 0;
    virtual bool SendDelete(const ObjectId& objId, const JSIDVariant& id,
                            ReturnStatus* rs) = 0;

    virtual bool SendHas(const ObjectId& objId, const JSIDVariant& id,
                         ReturnStatus* rs, bool* bp) = 0;
    virtual bool SendHasOwn(const ObjectId& objId, const JSIDVariant& id,
                            ReturnStatus* rs, bool* bp) = 0;
    virtual bool SendGet(const ObjectId& objId, const JSVariant& receiverVar,
                         const JSIDVariant& id,
                         ReturnStatus* rs, JSVariant* result) = 0;
    virtual bool SendSet(const ObjectId& objId, const JSIDVariant& id, const JSVariant& value,
                         const JSVariant& receiverVar, ReturnStatus* rs) = 0;

    virtual bool SendIsExtensible(const ObjectId& objId, ReturnStatus* rs,
                                  bool* result) = 0;
    virtual bool SendCallOrConstruct(const ObjectId& objId, const nsTArray<JSParam>& argv,
                                     const bool& construct, ReturnStatus* rs, JSVariant* result,
                                     nsTArray<JSParam>* outparams) = 0;
    virtual bool SendHasInstance(const ObjectId& objId, const JSVariant& v,
                                 ReturnStatus* rs, bool* bp) = 0;
    virtual bool SendGetBuiltinClass(const ObjectId& objId, ReturnStatus* rs,
                                     uint32_t* classValue) = 0;
    virtual bool SendIsArray(const ObjectId& objId, ReturnStatus* rs,
                             uint32_t* answer) = 0;
    virtual bool SendClassName(const ObjectId& objId, nsCString* result) = 0;
    virtual bool SendGetPrototype(const ObjectId& objId, ReturnStatus* rs, ObjectOrNullVariant* result) = 0;
    virtual bool SendGetPrototypeIfOrdinary(const ObjectId& objId, ReturnStatus* rs, bool* isOrdinary,
                                            ObjectOrNullVariant* result) = 0;
    virtual bool SendRegExpToShared(const ObjectId& objId, ReturnStatus* rs, nsString* source,
                                    uint32_t* flags) = 0;

    virtual bool SendGetPropertyKeys(const ObjectId& objId, const uint32_t& flags,
                                     ReturnStatus* rs, nsTArray<JSIDVariant>* ids) = 0;
    virtual bool SendInstanceOf(const ObjectId& objId, const JSIID& iid,
                                ReturnStatus* rs, bool* instanceof) = 0;
    virtual bool SendDOMInstanceOf(const ObjectId& objId, const int& prototypeID, const int& depth,
                                   ReturnStatus* rs, bool* instanceof) = 0;
};

} // namespace jsipc
} // namespace mozilla

#endif // mozilla_jsipc_WrapperOwner_h__