bool
EventListenerManager::DispatchEvent(JSContext* aCx, const EventTarget& aTarget,
JSObject* aEvent, ErrorResult& aRv) const
{
using namespace mozilla::dom::workers::events;
if (!IsSupportedEventClass(aEvent)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
jsval val;
if (!JS_GetProperty(aCx, aEvent, "target", &val)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
if (!JSVAL_IS_NULL(val)) {
// Already has a target, must be recursively dispatched. Throw.
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
if (PR_CLIST_IS_EMPTY(&mCollectionHead)) {
return false;
}
JSString* eventType;
JSBool eventIsTrusted;
if (!JS_GetProperty(aCx, aEvent, "type", &val) ||
!(eventType = JS_ValueToString(aCx, val)) ||
!(eventType = JS_InternJSString(aCx, eventType))) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
// We have already ensure that the event is one of our types of events so
// there is no need to worry about this property being faked.
if (!JS_GetProperty(aCx, aEvent, "isTrusted", &val) ||
!JS_ValueToBoolean(aCx, val, &eventIsTrusted)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
ListenerCollection* collection =
GetCollectionForType(&mCollectionHead,
INTERNED_STRING_TO_JSID(aCx, eventType));
if (!collection) {
return false;
}
ContextAllocPolicy ap(aCx);
// XXXbent There is no reason to use nsAutoJSValHolder here as we should be
// able to use js::AutoValueVector. Worse, nsAutoJSValHolder is much
// slower. However, js::AutoValueVector causes crashes on Android at
// the moment so we don't have much choice.
js::Vector<nsAutoJSValHolder, 10, ContextAllocPolicy> listeners(ap);
for (PRCList* elem = PR_NEXT_LINK(&collection->mListenerHead);
elem != &collection->mListenerHead;
elem = PR_NEXT_LINK(elem)) {
ListenerData* listenerData = static_cast<ListenerData*>(elem);
// Listeners that don't want untrusted events will be skipped if this is an
// untrusted event.
if (eventIsTrusted || listenerData->mWantsUntrusted) {
nsAutoJSValHolder holder;
if (!holder.Hold(aCx)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return false;
}
holder = listenerData->mListener;
if (!listeners.append(holder)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return false;
}
}
}
if (listeners.empty()) {
return false;
}
SetEventTarget(aEvent, aTarget.GetJSObject());
for (size_t index = 0; index < listeners.length(); index++) {
if (EventImmediatePropagationStopped(aEvent)) {
break;
}
// If anything fails in here we want to report the exception and continue on
// to the next listener rather than bailing out. If something fails and
// does not set an exception then we bail out entirely as we've either run
// out of memory or the operation callback has indicated that we should
// stop running.
jsval listenerVal = listeners[index];
JSObject* listenerObj;
if (!JS_ValueToObject(aCx, listenerVal, &listenerObj)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
static const char sHandleEventChars[] = "handleEvent";
JSObject* thisObj = aTarget.GetJSObject();
JSBool hasHandleEvent;
if (!JS_HasProperty(aCx, listenerObj, sHandleEventChars, &hasHandleEvent)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
if (hasHandleEvent) {
if (!JS_GetProperty(aCx, listenerObj, sHandleEventChars, &listenerVal)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
thisObj = listenerObj;
}
jsval argv[] = { OBJECT_TO_JSVAL(aEvent) };
jsval rval = JSVAL_VOID;
if (!JS_CallFunctionValue(aCx, thisObj, listenerVal, ArrayLength(argv),
argv, &rval)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
}
return EventWasCanceled(aEvent);
}
bool
EventListenerManager::DispatchEvent(JSContext* aCx, const EventTarget& aTarget,
JSObject* event, ErrorResult& aRv) const
{
JS::Rooted<JSObject*> aEvent(aCx, event);
using namespace mozilla::dom::workers::events;
if (!IsSupportedEventClass(aEvent)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
JS::Rooted<JS::Value> val(aCx);
if (!JS_GetProperty(aCx, aEvent, "target", &val)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
if (!JSVAL_IS_NULL(val)) {
// Already has a target, must be recursively dispatched. Throw.
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
if (mCollections.isEmpty()) {
return false;
}
JS::Rooted<JSString*> eventType(aCx);
bool eventIsTrusted;
if (!JS_GetProperty(aCx, aEvent, "type", &val) ||
!(eventType = JS_ValueToString(aCx, val)) ||
!(eventType = JS_InternJSString(aCx, eventType))) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
// We have already ensure that the event is one of our types of events so
// there is no need to worry about this property being faked.
if (!JS_GetProperty(aCx, aEvent, "isTrusted", &val) ||
!JS_ValueToBoolean(aCx, val, &eventIsTrusted)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
ListenerCollection* collection =
GetCollectionForType(mCollections, INTERNED_STRING_TO_JSID(aCx, eventType));
if (!collection) {
return false;
}
JS::AutoValueVector listeners(aCx);
for (ListenerData* listenerData = collection->mListeners.getFirst();
listenerData;
listenerData = listenerData->getNext()) {
// Listeners that don't want untrusted events will be skipped if this is an
// untrusted event.
if (eventIsTrusted || listenerData->mWantsUntrusted) {
if (!listeners.append(OBJECT_TO_JSVAL(listenerData->mListener))) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return false;
}
}
}
if (listeners.empty()) {
return false;
}
SetEventTarget(aEvent, aTarget.GetJSObject());
for (size_t index = 0; index < listeners.length(); index++) {
if (EventImmediatePropagationStopped(aEvent)) {
break;
}
// If anything fails in here we want to report the exception and continue on
// to the next listener rather than bailing out. If something fails and
// does not set an exception then we bail out entirely as we've either run
// out of memory or the operation callback has indicated that we should
// stop running.
JS::Rooted<JS::Value> listenerVal(aCx, listeners[index]);
JS::Rooted<JSObject*> listenerObj(aCx);
if (!JS_ValueToObject(aCx, listenerVal, &listenerObj)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
static const char sHandleEventChars[] = "handleEvent";
JS::Rooted<JSObject*> thisObj(aCx, aTarget.GetJSObject());
bool hasHandleEvent;
if (!JS_HasProperty(aCx, listenerObj, sHandleEventChars, &hasHandleEvent)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
if (hasHandleEvent) {
if (!JS_GetProperty(aCx, listenerObj, sHandleEventChars, &listenerVal)) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
thisObj = listenerObj;
}
jsval argv[] = { OBJECT_TO_JSVAL(aEvent) };
JS::Rooted<JS::Value> rval(aCx);
if (!JS_CallFunctionValue(aCx, thisObj, listenerVal, ArrayLength(argv),
argv, rval.address())) {
if (!JS_ReportPendingException(aCx)) {
aRv.Throw(NS_ERROR_FAILURE);
return false;
}
continue;
}
}
return EventWasCanceled(aEvent);
}