// Find the subject and object principal. The argument
// subjectPrincipal can be null if the caller doesn't care about the
// subject principal, and secMgr can also be null if the caller
// doesn't need the security manager.
static nsresult
FindPrincipals(JSContext *cx, JSObject *obj, nsIPrincipal **objectPrincipal,
nsIPrincipal **subjectPrincipal,
nsIScriptSecurityManager **secMgr)
{
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return NS_ERROR_UNEXPECTED;
}
nsIScriptSecurityManager *ssm = XPCWrapper::GetSecurityManager();
if (subjectPrincipal) {
NS_IF_ADDREF(*subjectPrincipal = ssm->GetCxSubjectPrincipal(cx));
}
ssm->GetObjectPrincipal(cx, obj, objectPrincipal);
if (secMgr) {
NS_ADDREF(*secMgr = ssm);
}
return *objectPrincipal ? NS_OK : NS_ERROR_XPC_SECURITY_MANAGER_VETO;
}
static JSBool
XPC_XOW_Enumerate(JSContext *cx, JSObject *obj)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Nothing to enumerate.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't enumerate on foreign objects.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
return XPCWrapper::Enumerate(cx, obj, wrappedObj);
}
static JSBool
XPC_XOW_Construct(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
JSObject *realObj = GetWrapper(JSVAL_TO_OBJECT(argv[-2]));
JSObject *wrappedObj = GetWrappedObject(cx, realObj);
if (!wrappedObj) {
// Nothing to construct.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't construct.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
if (!JS_CallFunctionValue(cx, obj, OBJECT_TO_JSVAL(wrappedObj), argc, argv,
rval)) {
return JS_FALSE;
}
return XPC_XOW_RewrapIfNeeded(cx, wrappedObj, rval);
}
static JSBool
XPC_COW_Convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp)
{
// Don't do any work to convert to object.
if (type == JSTYPE_OBJECT) {
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Converting the prototype to something.
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
if (!STOBJ_GET_CLASS(wrappedObj)->convert(cx, wrappedObj, type, vp)) {
return JS_FALSE;
}
return XPC_COW_RewrapForContent(cx, obj, vp);
}
static JSBool
XPC_COW_NewResolve(JSContext *cx, JSObject *obj, jsval idval, uintN flags,
JSObject **objp)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// No wrappedObj means that this is probably the prototype.
*objp = nsnull;
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
jsid id;
JSBool canTouch;
if (!JS_ValueToId(cx, idval, &id) ||
!CanTouchProperty(cx, obj, id, (flags & JSRESOLVE_ASSIGNING) != 0,
&canTouch)) {
return JS_FALSE;
}
if (!canTouch) {
return ThrowException(NS_ERROR_XPC_SECURITY_MANAGER_VETO, cx);
}
return XPCWrapper::NewResolve(cx, obj, JS_TRUE, wrappedObj, id, flags, objp);
}
static JSObject *
XPC_COW_Iterator(JSContext *cx, JSObject *obj, JSBool keysonly)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
ThrowException(NS_ERROR_INVALID_ARG, cx);
return nsnull;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
ThrowException(NS_ERROR_FAILURE, cx);
return nsnull;
}
JSObject *wrapperIter = JS_NewObject(cx, &sXPC_COW_JSClass.base, nsnull,
JS_GetGlobalForObject(cx, obj));
if (!wrapperIter) {
return nsnull;
}
JSAutoTempValueRooter tvr(cx, OBJECT_TO_JSVAL(wrapperIter));
// Initialize our COW.
jsval v = OBJECT_TO_JSVAL(wrappedObj);
if (!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sWrappedObjSlot, v) ||
!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sFlagsSlot,
JSVAL_ZERO)) {
return nsnull;
}
return XPCWrapper::CreateIteratorObj(cx, wrapperIter, obj, wrappedObj,
keysonly);
}
static JSBool
XPC_XOW_Call(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Nothing to call.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't call.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
JSObject *callee = JSVAL_TO_OBJECT(argv[-2]);
NS_ASSERTION(GetWrappedObject(cx, callee), "How'd we get here?");
callee = GetWrappedObject(cx, callee);
if (!JS_CallFunctionValue(cx, obj, OBJECT_TO_JSVAL(callee), argc, argv,
rval)) {
return JS_FALSE;
}
return XPC_XOW_RewrapIfNeeded(cx, callee, rval);
}
/* PRBool resolve (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval id); */
NS_IMETHODIMP
nsJSIID::NewResolve(nsIXPConnectWrappedNative *wrapper,
JSContext * cx, JSObject * obj,
jsid id, PRUint32 flags,
JSObject * *objp, PRBool *_retval)
{
XPCCallContext ccx(JS_CALLER, cx);
AutoMarkingNativeInterfacePtr iface(ccx);
const nsIID* iid;
mInfo->GetIIDShared(&iid);
iface = XPCNativeInterface::GetNewOrUsed(ccx, iid);
if(!iface)
return NS_OK;
XPCNativeMember* member = iface->FindMember(id);
if(member && member->IsConstant())
{
jsval val;
if(!member->GetConstantValue(ccx, iface, &val))
return NS_ERROR_OUT_OF_MEMORY;
*objp = obj;
*_retval = JS_DefinePropertyById(cx, obj, id, val, nsnull, nsnull,
JSPROP_ENUMERATE | JSPROP_READONLY |
JSPROP_PERMANENT);
}
return NS_OK;
}
/* PRBool enumerate (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj); */
NS_IMETHODIMP
nsJSIID::Enumerate(nsIXPConnectWrappedNative *wrapper,
JSContext * cx, JSObject * obj, PRBool *_retval)
{
// In this case, let's just eagerly resolve...
XPCCallContext ccx(JS_CALLER, cx);
AutoMarkingNativeInterfacePtr iface(ccx);
const nsIID* iid;
mInfo->GetIIDShared(&iid);
iface = XPCNativeInterface::GetNewOrUsed(ccx, iid);
if(!iface)
return NS_OK;
PRUint16 count = iface->GetMemberCount();
for(PRUint16 i = 0; i < count; i++)
{
XPCNativeMember* member = iface->GetMemberAt(i);
if(member && member->IsConstant() &&
!xpc_ForcePropertyResolve(cx, obj, member->GetName()))
{
return NS_ERROR_UNEXPECTED;
}
}
return NS_OK;
}
static JSBool
XPC_XOW_DelProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't delete properties on foreign objects.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
// Same origin, pass this request along.
return XPCWrapper::DelProperty(cx, wrappedObj, id, vp);
}
static JSBool
XPC_XOW_FunctionWrapper(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
JSObject *wrappedObj, *outerObj = obj;
// Allow 'this' to be either an XOW, in which case we unwrap it.
// We disallow invalid XOWs that have no wrapped object. Otherwise,
// if it isn't an XOW, then pass it through as-is.
wrappedObj = GetWrapper(obj);
if (wrappedObj) {
wrappedObj = GetWrappedObject(cx, wrappedObj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
} else {
wrappedObj = obj;
}
JSObject *funObj = JSVAL_TO_OBJECT(argv[-2]);
jsval funToCall;
if (!JS_GetReservedSlot(cx, funObj, XPCWrapper::eWrappedFunctionSlot,
&funToCall)) {
return JS_FALSE;
}
JSFunction *fun = JS_ValueToFunction(cx, funToCall);
if (!fun) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, JSVAL_TO_OBJECT(funToCall), nsnull);
if (NS_FAILED(rv) && rv != NS_ERROR_DOM_PROP_ACCESS_DENIED) {
return ThrowException(rv, cx);
}
#ifdef DEBUG
JSNative native = JS_GetFunctionNative(cx, fun);
NS_ASSERTION(native, "How'd we get here with a scripted function?");
#endif
if (!JS_CallFunctionValue(cx, wrappedObj, funToCall, argc, argv, rval)) {
return JS_FALSE;
}
if (NS_SUCCEEDED(rv)) {
return WrapSameOriginProp(cx, outerObj, rval);
}
return XPC_XOW_RewrapIfNeeded(cx, obj, rval);
}
/* readonly attribute nsISimpleEnumerator enumerator; */
NS_IMETHODIMP
nsXPCWrappedJS::GetEnumerator(nsISimpleEnumerator * *aEnumerate)
{
XPCCallContext ccx(NATIVE_CALLER);
if (!ccx.IsValid())
return NS_ERROR_UNEXPECTED;
return nsXPCWrappedJSClass::BuildPropertyEnumerator(ccx, GetJSObject(),
aEnumerate);
}
/* nsIVariant getProperty (in AString name); */
NS_IMETHODIMP
nsXPCWrappedJS::GetProperty(const nsAString & name, nsIVariant **_retval)
{
XPCCallContext ccx(NATIVE_CALLER);
if (!ccx.IsValid())
return NS_ERROR_UNEXPECTED;
return nsXPCWrappedJSClass::
GetNamedPropertyAsVariant(ccx, GetJSObject(), name, _retval);
}
static JSBool
XPC_COW_GetOrSetProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp,
JSBool isSet)
{
obj = GetWrapper(obj);
if (!obj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
AUTO_MARK_JSVAL(ccx, vp);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
jsid interned_id;
if (!JS_ValueToId(cx, id, &interned_id)) {
return JS_FALSE;
}
if (interned_id == GetRTIdByIndex(cx, XPCJSRuntime::IDX_PROTO) ||
interned_id == GetRTIdByIndex(cx, XPCJSRuntime::IDX_PARENT) ||
interned_id == GetRTIdByIndex(cx, XPCJSRuntime::IDX_EXPOSEDPROPS)) {
// No getting or setting __proto__ or __parent__ on my object.
return ThrowException(NS_ERROR_INVALID_ARG, cx); // XXX better error message
}
JSBool canTouch;
if (!CanTouchProperty(cx, obj, interned_id, isSet, &canTouch)) {
return JS_FALSE;
}
if (!canTouch) {
return ThrowException(NS_ERROR_XPC_SECURITY_MANAGER_VETO, cx);
}
if (!XPC_COW_RewrapForChrome(cx, obj, vp)) {
return JS_FALSE;
}
JSBool ok = isSet
? JS_SetPropertyById(cx, wrappedObj, interned_id, vp)
: JS_GetPropertyById(cx, wrappedObj, interned_id, vp);
if (!ok) {
return JS_FALSE;
}
return XPC_COW_RewrapForContent(cx, obj, vp);
}
nsresult xpcJSWeakReference::Init()
{
nsresult rv;
nsXPConnect* xpc = nsXPConnect::GetXPConnect();
if (!xpc) return NS_ERROR_UNEXPECTED;
nsAXPCNativeCallContext *cc = nsnull;
rv = xpc->GetCurrentNativeCallContext(&cc);
NS_ENSURE_SUCCESS(rv, rv);
JSContext *cx = nsnull;
rv = cc->GetJSContext(&cx);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 argc = 0;
rv = cc->GetArgc(&argc);
NS_ENSURE_SUCCESS(rv, rv);
if (argc != 1) return NS_ERROR_FAILURE;
jsval *argv = nsnull;
rv = cc->GetArgvPtr(&argv);
NS_ENSURE_SUCCESS(rv, rv);
JSAutoRequest ar(cx);
if (JSVAL_IS_NULL(argv[0])) return NS_ERROR_FAILURE;
JSObject *obj;
if (!JS_ValueToObject(cx, argv[0], &obj))
return NS_ERROR_FAILURE;
XPCCallContext ccx(NATIVE_CALLER, cx);
nsRefPtr<nsXPCWrappedJS> wrapped;
rv = nsXPCWrappedJS::GetNewOrUsed(ccx,
obj,
NS_GET_IID(nsISupports),
nsnull,
getter_AddRefs(wrapped));
if (!wrapped) {
NS_ERROR("can't get nsISupportsWeakReference wrapper for obj");
return rv;
}
return static_cast<nsISupportsWeakReference*>(wrapped)->
GetWeakReference(getter_AddRefs(mWrappedJSObject));
}
static JSObject *
XPC_XOW_Iterator(JSContext *cx, JSObject *obj, JSBool keysonly)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
ThrowException(NS_ERROR_INVALID_ARG, cx);
return nsnull;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
ThrowException(NS_ERROR_FAILURE, cx);
return nsnull;
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't create iterators for foreign objects.
ThrowException(rv, cx);
return nsnull;
}
ThrowException(NS_ERROR_FAILURE, cx);
return nsnull;
}
JSObject *wrapperIter = JS_NewObject(cx, &sXPC_XOW_JSClass.base, nsnull,
JS_GetGlobalForObject(cx, obj));
if (!wrapperIter) {
return nsnull;
}
JSAutoTempValueRooter tvr(cx, OBJECT_TO_JSVAL(wrapperIter));
// Initialize our XOW.
jsval v = OBJECT_TO_JSVAL(wrappedObj);
if (!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sWrappedObjSlot, v) ||
!JS_SetReservedSlot(cx, wrapperIter, XPCWrapper::sFlagsSlot,
JSVAL_ZERO) ||
!JS_SetReservedSlot(cx, wrapperIter, XPC_XOW_ScopeSlot,
PRIVATE_TO_JSVAL(nsnull))) {
return nsnull;
}
return XPCWrapper::CreateIteratorObj(cx, wrapperIter, obj, wrappedObj,
keysonly);
}
static JSBool
XPC_COW_DelProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
// Deleting a property is safe.
return XPCWrapper::DelProperty(cx, wrappedObj, id, vp);
}
XPCDispTypeInfo * XPCDispatchTearOff::GetCOMTypeInfo()
{
// If one was already created return it
if(mCOMTypeInfo)
return mCOMTypeInfo;
// Build a new one, save the pointer and return it
XPCCallContext ccx(NATIVE_CALLER);
if(!ccx.IsValid())
return nsnull;
JSObject* obj = GetJSObject();
if(!obj)
return nsnull;
mCOMTypeInfo = XPCDispTypeInfo::New(ccx, obj);
NS_IF_ADDREF(mCOMTypeInfo);
return mCOMTypeInfo;
}
/* nsIVariant getProperty (in AString name); */
NS_IMETHODIMP
nsXPCWrappedJS::GetProperty(const nsAString & name, nsIVariant **_retval)
{
XPCCallContext ccx(NATIVE_CALLER);
if (!ccx.IsValid())
return NS_ERROR_UNEXPECTED;
nsStringBuffer* buf;
jsval jsstr = XPCStringConvert::ReadableToJSVal(ccx, name, &buf);
if (JSVAL_IS_NULL(jsstr))
return NS_ERROR_OUT_OF_MEMORY;
if (buf)
buf->AddRef();
return nsXPCWrappedJSClass::
GetNamedPropertyAsVariant(ccx, GetJSObject(), jsstr, _retval);
}
static JSBool
XPC_XOW_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
obj = GetWrapper(obj);
if (!obj) {
return ThrowException(NS_ERROR_UNEXPECTED, cx);
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Someone's calling toString on our prototype.
NS_NAMED_LITERAL_CSTRING(protoString, "[object XPCCrossOriginWrapper]");
JSString *str =
JS_NewStringCopyN(cx, protoString.get(), protoString.Length());
if (!str) {
return JS_FALSE;
}
*rval = STRING_TO_JSVAL(str);
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
nsIScriptSecurityManager *ssm = XPCWrapper::GetSecurityManager();
if (!ssm) {
return ThrowException(NS_ERROR_NOT_INITIALIZED, cx);
}
rv = ssm->CheckPropertyAccess(cx, wrappedObj,
STOBJ_GET_CLASS(wrappedObj)->name,
GetRTStringByIndex(cx, XPCJSRuntime::IDX_TO_STRING),
nsIXPCSecurityManager::ACCESS_GET_PROPERTY);
}
if (NS_FAILED(rv)) {
return JS_FALSE;
}
XPCWrappedNative *wn =
XPCWrappedNative::GetWrappedNativeOfJSObject(cx, wrappedObj);
return XPCWrapper::NativeToString(cx, wn, argc, argv, rval, JS_FALSE);
}
static JSBool
XPC_COW_Enumerate(JSContext *cx, JSObject *obj)
{
obj = GetWrapper(obj);
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Nothing to enumerate.
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
return XPCWrapper::Enumerate(cx, obj, wrappedObj);
}
static JSBool
XPC_XOW_Convert(JSContext *cx, JSObject *obj, JSType type, jsval *vp)
{
// Don't do any work to convert to object.
if (type == JSTYPE_OBJECT) {
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
// Converting the prototype to something.
if (type == JSTYPE_STRING || type == JSTYPE_VOID) {
return XPC_XOW_toString(cx, obj, 0, nsnull, vp);
}
*vp = OBJECT_TO_JSVAL(obj);
return JS_TRUE;
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
// Note: JSTYPE_VOID and JSTYPE_STRING are equivalent.
nsresult rv = CanAccessWrapper(cx, wrappedObj, nsnull);
if (NS_FAILED(rv) &&
(rv != NS_ERROR_DOM_PROP_ACCESS_DENIED ||
(type != JSTYPE_STRING && type != JSTYPE_VOID))) {
// Ensure that we report some kind of error.
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
ThrowException(rv, cx);
}
return JS_FALSE;
}
if (!STOBJ_GET_CLASS(wrappedObj)->convert(cx, wrappedObj, type, vp)) {
return JS_FALSE;
}
return NS_SUCCEEDED(rv)
? WrapSameOriginProp(cx, obj, vp)
: XPC_XOW_RewrapIfNeeded(cx, obj, vp);
}
/* PRBool hasInstance (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in JSVal val, out PRBool bp); */
NS_IMETHODIMP
nsJSIID::HasInstance(nsIXPConnectWrappedNative *wrapper,
JSContext * cx, JSObject * obj,
jsval val, PRBool *bp, PRBool *_retval)
{
*bp = JS_FALSE;
nsresult rv = NS_OK;
if(!JSVAL_IS_PRIMITIVE(val))
{
// we have a JSObject
JSObject* obj = JSVAL_TO_OBJECT(val);
NS_ASSERTION(obj, "when is an object not an object?");
// is this really a native xpcom object with a wrapper?
XPCWrappedNative* other_wrapper =
XPCWrappedNative::GetWrappedNativeOfJSObject(cx, obj);
if(!other_wrapper)
return NS_OK;
const nsIID* iid;
mInfo->GetIIDShared(&iid);
// We'll trust the interface set of the wrapper if this is known
// to be an interface that the objects *expects* to be able to
// handle.
if(other_wrapper->HasInterfaceNoQI(*iid))
{
*bp = JS_TRUE;
return NS_OK;
}
// Otherwise, we'll end up Querying the native object to be sure.
XPCCallContext ccx(JS_CALLER, cx);
AutoMarkingNativeInterfacePtr iface(ccx);
iface = XPCNativeInterface::GetNewOrUsed(ccx, iid);
if(iface && other_wrapper->FindTearOff(ccx, iface))
*bp = JS_TRUE;
}
return rv;
}
/* 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->GetStringID(XPCJSRuntime::IDX_CREATE_INSTANCE),
argc, argv, vp);
*_retval = XPCWrappedNative::CallMethod(ccx);
return NS_OK;
}
ActiveXSupports(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
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;
}
// 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;
}
PRUint32 len;
jschar * className = xpc_JSString2String(ccx, argv[0], &len);
CComBSTR bstrClassName(len, reinterpret_cast<const WCHAR *>(className));
if(!className)
{
XPCThrower::Throw(NS_ERROR_XPC_COM_INVALID_CLASS_ID, ccx);
return JS_FALSE;
}
CLSID classID = CLSID_NULL;
HRESULT hr = CLSIDFromString(bstrClassName, &classID);
if(FAILED(hr) || ::IsEqualCLSID(classID, CLSID_NULL))
{
XPCThrower::Throw(NS_ERROR_XPC_COM_INVALID_CLASS_ID, ccx);
return JS_FALSE;
}
// Instantiate the desired COM object
HRESULT rv = XPCDispObject::SecurityCheck(ccx, classID);
*rval = BOOLEAN_TO_JSVAL(SUCCEEDED(rv));
return JS_TRUE;
}
static JSBool
XPC_XOW_AddProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
// All AddProperty needs to do is pass on addProperty requests to
// same-origin objects, and throw for all else.
obj = GetWrapper(obj);
jsval resolving;
if (!JS_GetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot, &resolving)) {
return JS_FALSE;
}
if (HAS_FLAGS(resolving, FLAG_RESOLVING)) {
// Allow us to define a property on ourselves.
return JS_TRUE;
}
JSObject *wrappedObj = GetWrappedObject(cx, obj);
if (!wrappedObj) {
return ThrowException(NS_ERROR_ILLEGAL_VALUE, cx);
}
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
JSBool privilegeEnabled = JS_FALSE;
nsresult rv = CanAccessWrapper(cx, wrappedObj, &privilegeEnabled);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Can't override properties on foreign objects.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
// Same origin, pass this request along.
return XPCWrapper::AddProperty(cx, obj, JS_TRUE, wrappedObj, id, vp);
}
/**
* Callback for functions
* This callback is called by JS when a function on a JSObject proxying
* for an IDispatch instance
* @param cx A pointer to a JS context
* @param obj JS object that the parameterized property is on
* @param argc Number of arguments in this call
* @param argv The parameters passed in if any
* @param vp The return value
* @return Returns JS_TRUE if the operation succeeded
*/
JSBool JS_DLL_CALLBACK
XPC_IDispatch_CallMethod(JSContext* cx, JSObject* obj, uintN argc,
jsval* argv, jsval* vp)
{
NS_ASSERTION(JS_TypeOfValue(cx, argv[-2]) == JSTYPE_FUNCTION, "bad function");
JSObject* funobj = JSVAL_TO_OBJECT(argv[-2]);
XPCCallContext ccx(JS_CALLER, cx, obj, funobj, 0, argc, argv, vp);
XPCWrappedNative* wrapper = ccx.GetWrapper();
THROW_AND_RETURN_IF_BAD_WRAPPER(cx, wrapper);
ccx.SetArgsAndResultPtr(argc, argv, vp);
XPCDispInterface::Member* member;
XPCNativeInterface* iface;
#ifdef DEBUG
PRBool ok =
#endif
GetMember(ccx, funobj, iface, member);
NS_ASSERTION(ok, "GetMember faild in XPC_IDispatch_CallMethod");
ccx.SetIDispatchInfo(iface, member);
return XPCDispObject::Invoke(ccx, XPCDispObject::CALL_METHOD);
}
static JSBool
XPC_XOW_HasInstance(JSContext *cx, JSObject *obj, jsval v, JSBool *bp)
{
JSObject *iface = GetWrappedObject(cx, obj);
XPCCallContext ccx(JS_CALLER, cx);
if (!ccx.IsValid()) {
return ThrowException(NS_ERROR_FAILURE, cx);
}
nsresult rv = CanAccessWrapper(cx, iface, nsnull);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_DOM_PROP_ACCESS_DENIED) {
// Don't do this test across origins.
return ThrowException(rv, cx);
}
return JS_FALSE;
}
JSClass *clasp = STOBJ_GET_CLASS(iface);
*bp = JS_FALSE;
if (!clasp->hasInstance) {
return JS_TRUE;
}
// Prematurely unwrap the left hand side.
if (!JSVAL_IS_PRIMITIVE(v)) {
JSObject *test = JSVAL_TO_OBJECT(v);
// GetWrappedObject does an instanceof check.
test = GetWrappedObject(cx, test);
if (test) {
v = OBJECT_TO_JSVAL(test);
}
}
return clasp->hasInstance(cx, iface, v, bp);
}
nsresult xpcJSWeakReference::Init(JSContext* cx, const JS::Value& object)
{
if (!object.isObject())
return NS_OK;
JS::RootedObject obj(cx, &object.toObject());
XPCCallContext ccx(NATIVE_CALLER, cx);
// See if the object is a wrapped native that supports weak references.
nsISupports* supports =
nsXPConnect::XPConnect()->GetNativeOfWrapper(cx, obj);
nsCOMPtr<nsISupportsWeakReference> supportsWeakRef =
do_QueryInterface(supports);
if (supportsWeakRef) {
supportsWeakRef->GetWeakReference(getter_AddRefs(mReferent));
if (mReferent) {
return NS_OK;
}
}
// If it's not a wrapped native, or it is a wrapped native that does not
// support weak references, fall back to getting a weak ref to the object.
// See if object is a wrapped JSObject.
nsRefPtr<nsXPCWrappedJS> wrapped;
nsresult rv = nsXPCWrappedJS::GetNewOrUsed(ccx,
obj,
NS_GET_IID(nsISupports),
nullptr,
getter_AddRefs(wrapped));
if (!wrapped) {
NS_ERROR("can't get nsISupportsWeakReference wrapper for obj");
return rv;
}
return wrapped->GetWeakReference(getter_AddRefs(mReferent));
}
nsresult xpcJSWeakReference::Init(JSContext* cx, const JS::Value& object)
{
JSAutoRequest ar(cx);
if (!object.isObject())
return NS_ERROR_FAILURE;
JSObject& obj = object.toObject();
XPCCallContext ccx(NATIVE_CALLER, cx);
nsRefPtr<nsXPCWrappedJS> wrapped;
nsresult rv = nsXPCWrappedJS::GetNewOrUsed(ccx,
&obj,
NS_GET_IID(nsISupports),
nsnull,
getter_AddRefs(wrapped));
if (!wrapped) {
NS_ERROR("can't get nsISupportsWeakReference wrapper for obj");
return rv;
}
return wrapped->GetWeakReference(getter_AddRefs(mWrappedJSObject));
}