NS_IMETHODIMP
nsJSCID::Construct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg,
const CallArgs& args, bool* _retval)
{
RootedObject obj(cx, objArg);
XPCJSContext* xpccx = nsXPConnect::GetContextInstance();
if (!xpccx)
return NS_ERROR_FAILURE;
// 'push' a call context and call on it
RootedId name(cx, xpccx->GetStringID(XPCJSContext::IDX_CREATE_INSTANCE));
XPCCallContext ccx(cx, obj, nullptr, name, args.length(), args.array(),
args.rval().address());
*_retval = XPCWrappedNative::CallMethod(ccx);
return NS_OK;
}
static bool
DefinePropertyIfFound(XPCCallContext& ccx,
HandleObject obj,
HandleId idArg,
XPCNativeSet* set,
XPCNativeInterface* ifaceArg,
XPCNativeMember* member,
XPCWrappedNativeScope* scope,
bool reflectToStringAndToSource,
XPCWrappedNative* wrapperToReflectInterfaceNames,
XPCWrappedNative* wrapperToReflectDoubleWrap,
XPCNativeScriptableInfo* scriptableInfo,
unsigned propFlags,
bool* resolved)
{
RootedId id(ccx, idArg);
RefPtr<XPCNativeInterface> iface = ifaceArg;
XPCJSContext* xpccx = ccx.GetContext();
bool found;
const char* name;
propFlags |= JSPROP_RESOLVING;
if (set) {
if (iface)
found = true;
else
found = set->FindMember(id, &member, &iface);
} else
found = (nullptr != (member = iface->FindMember(id)));
if (!found) {
if (reflectToStringAndToSource) {
JSNative call;
uint32_t flags = 0;
if (scriptableInfo) {
nsCOMPtr<nsIClassInfo> classInfo = do_QueryInterface(
scriptableInfo->GetCallback());
if (classInfo) {
nsresult rv = classInfo->GetFlags(&flags);
if (NS_FAILED(rv))
return Throw(rv, ccx);
}
}
bool overwriteToString = !(flags & nsIClassInfo::DOM_OBJECT)
|| Preferences::GetBool("dom.XPCToStringForDOMClasses", false);
if(id == xpccx->GetStringID(XPCJSContext::IDX_TO_STRING)
&& overwriteToString)
{
call = XPC_WN_Shared_ToString;
name = xpccx->GetStringName(XPCJSContext::IDX_TO_STRING);
} else if (id == xpccx->GetStringID(XPCJSContext::IDX_TO_SOURCE)) {
call = XPC_WN_Shared_ToSource;
name = xpccx->GetStringName(XPCJSContext::IDX_TO_SOURCE);
} else if (id == SYMBOL_TO_JSID(
JS::GetWellKnownSymbol(ccx, JS::SymbolCode::toPrimitive)))
{
call = XPC_WN_Shared_toPrimitive;
name = "[Symbol.toPrimitive]";
} else {
call = nullptr;
}
if (call) {
RootedFunction fun(ccx, JS_NewFunction(ccx, call, 0, 0, name));
if (!fun) {
JS_ReportOutOfMemory(ccx);
return false;
}
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
RootedObject value(ccx, JS_GetFunctionObject(fun));
return JS_DefinePropertyById(ccx, obj, id, value,
propFlags & ~JSPROP_ENUMERATE);
}
}
// This *might* be a tearoff name that is not yet part of our
// set. Let's lookup the name and see if it is the name of an
// interface. Then we'll see if the object actually *does* this
// interface and add a tearoff as necessary.
if (wrapperToReflectInterfaceNames) {
JSAutoByteString name;
RefPtr<XPCNativeInterface> iface2;
XPCWrappedNativeTearOff* to;
RootedObject jso(ccx);
nsresult rv = NS_OK;
if (JSID_IS_STRING(id) &&
name.encodeLatin1(ccx, JSID_TO_STRING(id)) &&
(iface2 = XPCNativeInterface::GetNewOrUsed(name.ptr()), iface2) &&
nullptr != (to = wrapperToReflectInterfaceNames->
FindTearOff(iface2, true, &rv)) &&
nullptr != (jso = to->GetJSObject()))
{
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
return JS_DefinePropertyById(ccx, obj, id, jso,
propFlags & ~JSPROP_ENUMERATE);
} else if (NS_FAILED(rv) && rv != NS_ERROR_NO_INTERFACE) {
return Throw(rv, ccx);
}
}
// This *might* be a double wrapped JSObject
if (wrapperToReflectDoubleWrap &&
id == xpccx->GetStringID(XPCJSContext::IDX_WRAPPED_JSOBJECT) &&
GetDoubleWrappedJSObject(ccx, wrapperToReflectDoubleWrap)) {
// We build and add a getter function.
// A security check is done on a per-get basis.
JSFunction* fun;
id = xpccx->GetStringID(XPCJSContext::IDX_WRAPPED_JSOBJECT);
name = xpccx->GetStringName(XPCJSContext::IDX_WRAPPED_JSOBJECT);
fun = JS_NewFunction(ccx, XPC_WN_DoubleWrappedGetter,
0, 0, name);
if (!fun)
return false;
RootedObject funobj(ccx, JS_GetFunctionObject(fun));
if (!funobj)
return false;
propFlags |= JSPROP_GETTER | JSPROP_SHARED;
propFlags &= ~JSPROP_ENUMERATE;
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
return JS_DefinePropertyById(ccx, obj, id, UndefinedHandleValue, propFlags,
JS_DATA_TO_FUNC_PTR(JSNative, funobj.get()),
nullptr);
}
if (resolved)
*resolved = false;
return true;
}
if (!member) {
if (wrapperToReflectInterfaceNames) {
XPCWrappedNativeTearOff* to =
wrapperToReflectInterfaceNames->FindTearOff(iface, true);
if (!to)
return false;
RootedObject jso(ccx, to->GetJSObject());
if (!jso)
return false;
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
return JS_DefinePropertyById(ccx, obj, id, jso,
propFlags & ~JSPROP_ENUMERATE);
}
if (resolved)
*resolved = false;
return true;
}
if (member->IsConstant()) {
RootedValue val(ccx);
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
return member->GetConstantValue(ccx, iface, val.address()) &&
JS_DefinePropertyById(ccx, obj, id, val, propFlags);
}
if (scope->HasInterposition()) {
Rooted<PropertyDescriptor> desc(ccx);
if (!xpc::InterposeProperty(ccx, obj, iface->GetIID(), id, &desc))
return false;
if (desc.object()) {
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
desc.attributesRef() |= JSPROP_RESOLVING;
return JS_DefinePropertyById(ccx, obj, id, desc);
}
}
if (id == xpccx->GetStringID(XPCJSContext::IDX_TO_STRING) ||
id == xpccx->GetStringID(XPCJSContext::IDX_TO_SOURCE) ||
(scriptableInfo &&
scriptableInfo->GetFlags().DontEnumQueryInterface() &&
id == xpccx->GetStringID(XPCJSContext::IDX_QUERY_INTERFACE)))
propFlags &= ~JSPROP_ENUMERATE;
RootedValue funval(ccx);
if (!member->NewFunctionObject(ccx, iface, obj, funval.address()))
return false;
if (member->IsMethod()) {
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
return JS_DefinePropertyById(ccx, obj, id, funval, propFlags);
}
// else...
MOZ_ASSERT(member->IsAttribute(), "way broken!");
propFlags |= JSPROP_GETTER | JSPROP_SHARED;
propFlags &= ~JSPROP_READONLY;
JSObject* funobj = funval.toObjectOrNull();
JSNative getter = JS_DATA_TO_FUNC_PTR(JSNative, funobj);
JSNative setter;
if (member->IsWritableAttribute()) {
propFlags |= JSPROP_SETTER;
setter = JS_DATA_TO_FUNC_PTR(JSNative, funobj);
} else {
setter = nullptr;
}
AutoResolveName arn(ccx, id);
if (resolved)
*resolved = true;
return JS_DefinePropertyById(ccx, obj, id, UndefinedHandleValue, propFlags, getter, setter);
}