/* PRBool construct (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in PRUint32 argc, in JSValPtr argv, in JSValPtr vp); */
NS_IMETHODIMP
nsJSCID::Construct(nsIXPConnectWrappedNative *wrapper,
JSContext * cx, JSObject * obj,
PRUint32 argc, jsval * argv, jsval * vp,
PRBool *_retval)
{
XPCJSRuntime* rt = nsXPConnect::GetRuntimeInstance();
if(!rt)
return NS_ERROR_FAILURE;
// 'push' a call context and call on it
XPCCallContext ccx(JS_CALLER, cx, obj, nsnull,
rt->GetStringJSVal(XPCJSRuntime::IDX_CREATE_INSTANCE),
argc, argv, vp);
*_retval = XPCWrappedNative::CallMethod(ccx);
return NS_OK;
}
static JSBool
CommonConstructor(JSContext *cx, int name, JSObject *obj, uintN argc,
jsval *argv, jsval *rval, PRBool enforceSecurity)
{
XPCCallContext ccx(JS_CALLER, cx, JS_GetGlobalObject(cx));
// Check if IDispatch is enabled, fail if not
if(!nsXPConnect::IsIDispatchEnabled())
{
XPCThrower::Throw(NS_ERROR_XPC_IDISPATCH_NOT_ENABLED, ccx);
return JS_FALSE;
}
XPCJSRuntime *rt = ccx.GetRuntime();
if(!rt)
{
XPCThrower::Throw(NS_ERROR_UNEXPECTED, ccx);
return JS_FALSE;
}
nsIXPCSecurityManager* sm = ccx.GetXPCContext()
->GetAppropriateSecurityManager(nsIXPCSecurityManager::HOOK_CALL_METHOD);
XPCWrappedNative * wrapper = ccx.GetWrapper();
if(sm && NS_FAILED(sm->CanAccess(nsIXPCSecurityManager::ACCESS_CALL_METHOD,
&ccx, ccx, ccx.GetFlattenedJSObject(),
wrapper->GetIdentityObject(),
wrapper->GetClassInfo(),
rt->GetStringJSVal(name),
wrapper->GetSecurityInfoAddr())))
{
// Security manager will have set an exception
return JS_FALSE;
}
// Make sure we were called with one string parameter
if(argc != 1 || (argc == 1 && !JSVAL_IS_STRING(argv[0])))
{
XPCThrower::Throw(NS_ERROR_XPC_COM_INVALID_CLASS_ID, ccx);
return JS_FALSE;
}
JSString* str = JSVAL_TO_STRING(argv[0]);
PRUint32 len = JS_GetStringLength(str);
// Cap constructor argument length to keep from crashing in string
// code.
if(len > XPC_IDISPATCH_CTOR_MAX_ARG_LEN)
{
XPCThrower::Throw(NS_ERROR_XPC_COM_INVALID_CLASS_ID, ccx);
return JS_FALSE;
}
jschar * className = JS_GetStringChars(str);
CComBSTR bstrClassName(len, reinterpret_cast<const WCHAR *>(className));
if(!bstrClassName)
{
XPCThrower::Throw(NS_ERROR_XPC_COM_INVALID_CLASS_ID, ccx);
return JS_FALSE;
}
// Instantiate the desired COM object
CComPtr<IDispatch> pDispatch;
HRESULT rv = XPCDispObject::COMCreateInstance(ccx, bstrClassName,
enforceSecurity, &pDispatch);
if(FAILED(rv))
{
XPCThrower::ThrowCOMError(ccx, rv, NS_ERROR_XPC_COM_CREATE_FAILED);
return JS_FALSE;
}
// Get a wrapper for our object
nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
nsresult nsrv = ccx.GetXPConnect()->WrapNative(
ccx, ccx.GetOperandJSObject(), reinterpret_cast<nsISupports*>(pDispatch.p),
NSID_IDISPATCH, getter_AddRefs(holder));
if(NS_FAILED(nsrv))
{
XPCThrower::Throw(nsrv, ccx);
return JS_FALSE;
}
// get and return the JS object wrapper
JSObject * jsobj;
nsrv = holder->GetJSObject(&jsobj);
if(NS_FAILED(nsrv))
{
XPCThrower::Throw(nsrv, ccx);
return JS_FALSE;
}
*rval = OBJECT_TO_JSVAL(jsobj);
return JS_TRUE;
}
