static JSBool
WrapSameOriginProp(JSContext *cx, JSObject *outerObj, jsval *vp)
{
// Don't call XPC_XOW_RewrapIfNeeded for same origin properties. We only
// need to wrap window, document and location.
if (JSVAL_IS_PRIMITIVE(*vp)) {
return JS_TRUE;
}
JSObject *wrappedObj = JSVAL_TO_OBJECT(*vp);
JSClass *clasp = STOBJ_GET_CLASS(wrappedObj);
if (XPC_XOW_ClassNeedsXOW(clasp->name)) {
return XPC_XOW_WrapObject(cx, JS_GetGlobalForObject(cx, outerObj), vp);
}
// Check if wrappedObj is an XOW. If so, verify that it's from the
// right scope.
if (clasp == &sXPC_XOW_JSClass.base &&
STOBJ_GET_PARENT(wrappedObj) != STOBJ_GET_PARENT(outerObj)) {
*vp = OBJECT_TO_JSVAL(GetWrappedObject(cx, wrappedObj));
return XPC_XOW_WrapObject(cx, STOBJ_GET_PARENT(outerObj), vp);
}
return JS_TRUE;
}
/*
* Shared code to close iterator's state either through an explicit call or
* when GC detects that the iterator is no longer reachable.
*/
void
js_CloseNativeIterator(JSContext *cx, JSObject *iterobj)
{
jsval state;
JSObject *iterable;
JS_ASSERT(STOBJ_GET_CLASS(iterobj) == &js_IteratorClass);
/* Avoid double work if js_CloseNativeIterator was called on obj. */
state = STOBJ_GET_SLOT(iterobj, JSSLOT_ITER_STATE);
if (JSVAL_IS_NULL(state))
return;
/* Protect against failure to fully initialize obj. */
iterable = STOBJ_GET_PARENT(iterobj);
if (iterable) {
#if JS_HAS_XML_SUPPORT
uintN flags = JSVAL_TO_INT(STOBJ_GET_SLOT(iterobj, JSSLOT_ITER_FLAGS));
if ((flags & JSITER_FOREACH) && OBJECT_IS_XML(cx, iterable)) {
((JSXMLObjectOps *) iterable->map->ops)->
enumerateValues(cx, iterable, JSENUMERATE_DESTROY, &state,
NULL, NULL);
} else
#endif
OBJ_ENUMERATE(cx, iterable, JSENUMERATE_DESTROY, &state, NULL);
}
STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, JSVAL_NULL);
}
static inline JSObject *
GetUnsafeObject(JSObject *obj)
{
obj = FindSafeObject(obj);
if (!obj) {
return nsnull;
}
return STOBJ_GET_PARENT(obj);
}
// Because of the drastically different ways that same- and cross-origin XOWs
// work, we have to call JS_ClearScope when a XOW changes from being same-
// origin to cross-origin. Normally, there are defined places in Gecko where
// this happens and they notify us. However, UniversalXPConnect causes the
// same transition without any notifications. We could try to detect when this
// happens, but doing so would require calling JS_ClearScope from random
// hooks, which is bad.
//
// The compromise is the UXPCObject. When resolving a property on a XOW as
// same-origin because of UniversalXPConnect, we actually resolve it on the
// UXPCObject (which is just a XOW for the same object). This causes the JS
// engine to do all of its work on another object, not polluting the main
// object. However, if the get results in calling a setter, the engine still
// uses the regular object as 'this', ensuring that the UXPCObject doesn't
// leak to script.
static JSObject *
GetUXPCObject(JSContext *cx, JSObject *obj)
{
NS_ASSERTION(STOBJ_GET_CLASS(obj) == &sXPC_XOW_JSClass.base, "wrong object");
jsval v;
if (!JS_GetReservedSlot(cx, obj, XPCWrapper::sFlagsSlot, &v)) {
return nsnull;
}
if (HAS_FLAGS(v, FLAG_IS_UXPC_OBJECT)) {
return obj;
}
if (!JS_GetReservedSlot(cx, obj, sUXPCObjectSlot, &v)) {
return nsnull;
}
if (JSVAL_IS_OBJECT(v)) {
return JSVAL_TO_OBJECT(v);
}
JSObject *uxpco =
JS_NewObjectWithGivenProto(cx, &sXPC_XOW_JSClass.base, nsnull,
STOBJ_GET_PARENT(obj));
if (!uxpco) {
return nsnull;
}
JSAutoTempValueRooter tvr(cx, uxpco);
jsval wrappedObj, parentScope;
if (!JS_GetReservedSlot(cx, obj, XPCWrapper::sWrappedObjSlot, &wrappedObj) ||
!JS_GetReservedSlot(cx, obj, XPC_XOW_ScopeSlot, &parentScope)) {
return nsnull;
}
if (!JS_SetReservedSlot(cx, uxpco, XPCWrapper::sWrappedObjSlot, wrappedObj) ||
!JS_SetReservedSlot(cx, uxpco, XPCWrapper::sFlagsSlot,
INT_TO_JSVAL(FLAG_IS_UXPC_OBJECT)) ||
!JS_SetReservedSlot(cx, uxpco, XPC_XOW_ScopeSlot, parentScope)) {
return nsnull;
}
if (!JS_SetReservedSlot(cx, obj, sUXPCObjectSlot, OBJECT_TO_JSVAL(uxpco))) {
return nsnull;
}
return uxpco;
}
JSBool
XPC_XOW_RewrapIfNeeded(JSContext *cx, JSObject *outerObj, jsval *vp)
{
// Don't need to wrap primitive values.
if (JSVAL_IS_PRIMITIVE(*vp)) {
return JS_TRUE;
}
JSObject *obj = JSVAL_TO_OBJECT(*vp);
if (JS_ObjectIsFunction(cx, obj)) {
return XPC_XOW_WrapFunction(cx, outerObj, obj, vp);
}
XPCWrappedNative *wn = nsnull;
if (STOBJ_GET_CLASS(obj) == &sXPC_XOW_JSClass.base &&
STOBJ_GET_PARENT(outerObj) != STOBJ_GET_PARENT(obj)) {
*vp = OBJECT_TO_JSVAL(GetWrappedObject(cx, obj));
} else if (!(wn = XPCWrappedNative::GetAndMorphWrappedNativeOfJSObject(cx, obj))) {
return JS_TRUE;
}
return XPC_XOW_WrapObject(cx, JS_GetGlobalForObject(cx, outerObj), vp, wn);
}
JSBool
xpc_qsXPCOMObjectToJsval(XPCLazyCallContext &lccx, nsISupports *p,
nsWrapperCache *cache, const nsIID *iid,
XPCNativeInterface **iface, jsval *rval)
{
// From the T_INTERFACE case in XPCConvert::NativeData2JS.
// This is one of the slowest things quick stubs do.
JSContext *cx = lccx.GetJSContext();
if(!iface)
return xpc_qsThrow(cx, NS_ERROR_XPC_BAD_CONVERT_NATIVE);
// XXX The OBJ_IS_NOT_GLOBAL here is not really right. In
// fact, this code is depending on the fact that the
// global object will not have been collected, and
// therefore this NativeInterface2JSObject will not end up
// creating a new XPCNativeScriptableShared.
nsresult rv;
if(!XPCConvert::NativeInterface2JSObject(lccx, rval, nsnull, p,
iid, iface, cache,
lccx.GetCurrentJSObject(), PR_TRUE,
OBJ_IS_NOT_GLOBAL, &rv))
{
// I can't tell if NativeInterface2JSObject throws JS exceptions
// or not. This is a sloppy stab at the right semantics; the
// method really ought to be fixed to behave consistently.
if(!JS_IsExceptionPending(cx))
xpc_qsThrow(cx, NS_FAILED(rv) ? rv : NS_ERROR_UNEXPECTED);
return JS_FALSE;
}
#ifdef DEBUG
JSObject* jsobj = JSVAL_TO_OBJECT(*rval);
if(jsobj && !STOBJ_GET_PARENT(jsobj))
NS_ASSERTION(STOBJ_GET_CLASS(jsobj)->flags & JSCLASS_IS_GLOBAL,
"Why did we recreate this wrapper?");
#endif
return JS_TRUE;
}
static JSBool
CallEnumeratorNext(JSContext *cx, JSObject *iterobj, uintN flags, jsval *rval)
{
JSObject *obj, *origobj;
jsval state;
JSBool foreach;
jsid id;
JSObject *obj2;
JSBool cond;
JSClass *clasp;
JSExtendedClass *xclasp;
JSProperty *prop;
JSString *str;
JS_ASSERT(flags & JSITER_ENUMERATE);
JS_ASSERT(STOBJ_GET_CLASS(iterobj) == &js_IteratorClass);
obj = STOBJ_GET_PARENT(iterobj);
origobj = STOBJ_GET_PROTO(iterobj);
state = STOBJ_GET_SLOT(iterobj, JSSLOT_ITER_STATE);
if (JSVAL_IS_NULL(state))
goto stop;
foreach = (flags & JSITER_FOREACH) != 0;
#if JS_HAS_XML_SUPPORT
/*
* Treat an XML object specially only when it starts the prototype chain.
* Otherwise we need to do the usual deleted and shadowed property checks.
*/
if (obj == origobj && OBJECT_IS_XML(cx, obj)) {
if (foreach) {
JSXMLObjectOps *xmlops = (JSXMLObjectOps *) obj->map->ops;
if (!xmlops->enumerateValues(cx, obj, JSENUMERATE_NEXT, &state,
&id, rval)) {
return JS_FALSE;
}
} else {
if (!OBJ_ENUMERATE(cx, obj, JSENUMERATE_NEXT, &state, &id))
return JS_FALSE;
}
STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, state);
if (JSVAL_IS_NULL(state))
goto stop;
} else
#endif
{
restart:
if (!OBJ_ENUMERATE(cx, obj, JSENUMERATE_NEXT, &state, &id))
return JS_FALSE;
STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, state);
if (JSVAL_IS_NULL(state)) {
#if JS_HAS_XML_SUPPORT
if (OBJECT_IS_XML(cx, obj)) {
/*
* We just finished enumerating an XML obj that is present on
* the prototype chain of a non-XML origobj. Stop further
* prototype chain searches because XML objects don't
* enumerate prototypes.
*/
JS_ASSERT(origobj != obj);
JS_ASSERT(!OBJECT_IS_XML(cx, origobj));
} else
#endif
{
obj = OBJ_GET_PROTO(cx, obj);
if (obj) {
STOBJ_SET_PARENT(iterobj, obj);
if (!OBJ_ENUMERATE(cx, obj, JSENUMERATE_INIT, &state, NULL))
return JS_FALSE;
STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, state);
if (!JSVAL_IS_NULL(state))
goto restart;
}
}
goto stop;
}
/* Skip properties not in obj when looking from origobj. */
if (!OBJ_LOOKUP_PROPERTY(cx, origobj, id, &obj2, &prop))
return JS_FALSE;
if (!prop)
goto restart;
OBJ_DROP_PROPERTY(cx, obj2, prop);
/*
* If the id was found in a prototype object or an unrelated object
* (specifically, not in an inner object for obj), skip it. This step
* means that all OBJ_LOOKUP_PROPERTY implementations must return an
* object further along on the prototype chain, or else possibly an
* object returned by the JSExtendedClass.outerObject optional hook.
*/
if (obj != obj2) {
cond = JS_FALSE;
clasp = OBJ_GET_CLASS(cx, obj2);
if (clasp->flags & JSCLASS_IS_EXTENDED) {
xclasp = (JSExtendedClass *) clasp;
cond = xclasp->outerObject &&
xclasp->outerObject(cx, obj2) == obj;
}
if (!cond)
goto restart;
}
if (foreach) {
/* Get property querying the original object. */
if (!OBJ_GET_PROPERTY(cx, origobj, id, rval))
return JS_FALSE;
}
}
if (foreach) {
if (flags & JSITER_KEYVALUE) {
if (!NewKeyValuePair(cx, id, *rval, rval))
return JS_FALSE;
}
} else {
/* Make rval a string for uniformity and compatibility. */
str = js_ValueToString(cx, ID_TO_VALUE(id));
if (!str)
return JS_FALSE;
*rval = STRING_TO_JSVAL(str);
}
return JS_TRUE;
stop:
JS_ASSERT(STOBJ_GET_SLOT(iterobj, JSSLOT_ITER_STATE) == JSVAL_NULL);
*rval = JSVAL_HOLE;
return JS_TRUE;
}
