void V8AbstractEventListener::invokeEventHandler(v8::Handle<v8::Context> v8Context, Event* event, v8::Handle<v8::Value> jsEvent)
{
// We push the event being processed into the global object, so that it can be exposed by DOMWindow's bindings.
v8::Local<v8::String> eventSymbol = v8::String::NewSymbol("event");
v8::Local<v8::Value> returnValue;
// In beforeunload/unload handlers, we want to avoid sleeps which do tight loops of calling Date.getTime().
if (event->type() == "beforeunload" || event->type() == "unload")
DateExtension::get()->setAllowSleep(false);
{
// Catch exceptions thrown in the event handler so they do not propagate to javascript code that caused the event to fire.
v8::TryCatch tryCatch;
tryCatch.SetVerbose(true);
// Save the old 'event' property so we can restore it later.
v8::Local<v8::Value> savedEvent = v8Context->Global()->GetHiddenValue(eventSymbol);
tryCatch.Reset();
// Make the event available in the global object, so DOMWindow can expose it.
v8Context->Global()->SetHiddenValue(eventSymbol, jsEvent);
tryCatch.Reset();
// Call the event handler.
tryCatch.SetVerbose(false); // We do not want to report the exception to the inspector console.
returnValue = callListenerFunction(jsEvent, event);
if (!tryCatch.CanContinue())
return;
// If an error occurs while handling the event, it should be reported.
if (tryCatch.HasCaught()) {
reportException(0, tryCatch);
tryCatch.Reset();
}
// Restore the old event. This must be done for all exit paths through this method.
tryCatch.SetVerbose(true);
if (savedEvent.IsEmpty())
v8Context->Global()->SetHiddenValue(eventSymbol, v8::Undefined());
else
v8Context->Global()->SetHiddenValue(eventSymbol, savedEvent);
tryCatch.Reset();
}
if (event->type() == "beforeunload" || event->type() == "unload")
DateExtension::get()->setAllowSleep(true);
ASSERT(!V8Proxy::handleOutOfMemory() || returnValue.IsEmpty());
if (returnValue.IsEmpty())
return;
if (!returnValue->IsNull() && !returnValue->IsUndefined() && event->storesResultAsString())
event->storeResult(toWebCoreString(returnValue));
// Prevent default action if the return value is false;
// FIXME: Add example, and reference to bug entry.
if (m_isAttribute && returnValue->IsBoolean() && !returnValue->BooleanValue())
event->preventDefault();
}
void V8AbstractEventListener::invokeEventHandler(ExecutionContext* context, Event* event, v8::Local<v8::Value> jsEvent)
{
// If jsEvent is empty, attempt to set it as a hidden value would crash v8.
if (jsEvent.IsEmpty())
return;
v8::Local<v8::Context> v8Context = toV8Context(context, world());
if (v8Context.IsEmpty())
return;
// We push the event being processed into the global object, so that it can be exposed by DOMWindow's bindings.
v8::Handle<v8::String> eventSymbol = v8AtomicString(v8Context->GetIsolate(), "event");
v8::Local<v8::Value> returnValue;
{
// Catch exceptions thrown in the event handler so they do not propagate to javascript code that caused the event to fire.
v8::TryCatch tryCatch;
tryCatch.SetVerbose(true);
// Save the old 'event' property so we can restore it later.
v8::Local<v8::Value> savedEvent = getHiddenValue(v8Context->GetIsolate(), v8Context->Global(), eventSymbol);
tryCatch.Reset();
// Make the event available in the global object, so DOMWindow can expose it.
setHiddenValue(v8Context->GetIsolate(), v8Context->Global(), eventSymbol, jsEvent);
tryCatch.Reset();
returnValue = callListenerFunction(context, jsEvent, event);
if (tryCatch.HasCaught())
event->target()->uncaughtExceptionInEventHandler();
if (!tryCatch.CanContinue()) { // Result of TerminateExecution().
if (context->isWorkerGlobalScope())
toWorkerGlobalScope(context)->script()->forbidExecution();
return;
}
tryCatch.Reset();
// Restore the old event. This must be done for all exit paths through this method.
if (savedEvent.IsEmpty())
setHiddenValue(v8Context->GetIsolate(), v8Context->Global(), eventSymbol, v8::Undefined(v8Context->GetIsolate()));
else
setHiddenValue(v8Context->GetIsolate(), v8Context->Global(), eventSymbol, savedEvent);
tryCatch.Reset();
}
ASSERT(!handleOutOfMemory() || returnValue.IsEmpty());
if (returnValue.IsEmpty())
return;
if (!returnValue->IsNull() && !returnValue->IsUndefined() && event->isBeforeUnloadEvent()) {
V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, stringReturnValue, returnValue);
toBeforeUnloadEvent(event)->setReturnValue(stringReturnValue);
}
if (m_isAttribute && shouldPreventDefault(returnValue))
event->preventDefault();
}
void V8AbstractEventListener::invokeEventHandler(Event* event, v8::Local<v8::Value> jsEvent)
{
// If jsEvent is empty, attempt to set it as a hidden value would crash v8.
if (jsEvent.IsEmpty())
return;
ASSERT(!scriptState()->contextIsEmpty());
v8::Local<v8::Value> returnValue;
{
// Catch exceptions thrown in the event handler so they do not propagate to javascript code that caused the event to fire.
v8::TryCatch tryCatch;
tryCatch.SetVerbose(true);
// Save the old 'event' property so we can restore it later.
v8::Local<v8::Value> savedEvent = V8HiddenValue::getHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()));
tryCatch.Reset();
// Make the event available in the global object, so LocalDOMWindow can expose it.
V8HiddenValue::setHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()), jsEvent);
tryCatch.Reset();
returnValue = callListenerFunction(jsEvent, event);
if (tryCatch.HasCaught())
event->target()->uncaughtExceptionInEventHandler();
if (!tryCatch.CanContinue()) { // Result of TerminateExecution().
if (scriptState()->executionContext()->isWorkerGlobalScope())
toWorkerGlobalScope(scriptState()->executionContext())->script()->forbidExecution();
return;
}
tryCatch.Reset();
// Restore the old event. This must be done for all exit paths through this method.
if (savedEvent.IsEmpty())
V8HiddenValue::setHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()), v8::Undefined(isolate()));
else
V8HiddenValue::setHiddenValue(isolate(), scriptState()->context()->Global(), V8HiddenValue::event(isolate()), savedEvent);
tryCatch.Reset();
}
if (returnValue.IsEmpty())
return;
if (m_isAttribute && !returnValue->IsNull() && !returnValue->IsUndefined() && event->isBeforeUnloadEvent()) {
TOSTRING_VOID(V8StringResource<>, stringReturnValue, returnValue);
toBeforeUnloadEvent(event)->setReturnValue(stringReturnValue);
}
if (m_isAttribute && shouldPreventDefault(returnValue))
event->preventDefault();
}
void V8AbstractEventListener::invokeEventHandler(ScriptExecutionContext* context, Event* event, v8::Handle<v8::Value> jsEvent)
{
// If jsEvent is empty, attempt to set it as a hidden value would crash v8.
if (jsEvent.IsEmpty())
return;
v8::Local<v8::Context> v8Context = toV8Context(context, worldContext());
if (v8Context.IsEmpty())
return;
// We push the event being processed into the global object, so that it can be exposed by DOMWindow's bindings.
v8::Handle<v8::String> eventSymbol = V8HiddenPropertyName::event();
v8::Local<v8::Value> returnValue;
// In beforeunload/unload handlers, we want to avoid sleeps which do tight loops of calling Date.getTime().
if (event->type() == eventNames().beforeunloadEvent || event->type() == eventNames().unloadEvent)
DateExtension::get()->setAllowSleep(false);
{
// Catch exceptions thrown in the event handler so they do not propagate to javascript code that caused the event to fire.
v8::TryCatch tryCatch;
tryCatch.SetVerbose(true);
// Save the old 'event' property so we can restore it later.
v8::Local<v8::Value> savedEvent = v8Context->Global()->GetHiddenValue(eventSymbol);
tryCatch.Reset();
// Make the event available in the global object, so DOMWindow can expose it.
v8Context->Global()->SetHiddenValue(eventSymbol, jsEvent);
tryCatch.Reset();
returnValue = callListenerFunction(context, jsEvent, event);
if (tryCatch.HasCaught())
event->target()->uncaughtExceptionInEventHandler();
if (!tryCatch.CanContinue()) { // Result of TerminateExecution().
#if ENABLE(WORKERS)
if (context->isWorkerContext())
static_cast<WorkerContext*>(context)->script()->forbidExecution();
#endif
return;
}
tryCatch.Reset();
// Restore the old event. This must be done for all exit paths through this method.
if (savedEvent.IsEmpty())
v8Context->Global()->SetHiddenValue(eventSymbol, v8::Undefined());
else
v8Context->Global()->SetHiddenValue(eventSymbol, savedEvent);
tryCatch.Reset();
}
if (event->type() == eventNames().beforeunloadEvent || event->type() == eventNames().unloadEvent)
DateExtension::get()->setAllowSleep(true);
ASSERT(!handleOutOfMemory() || returnValue.IsEmpty());
if (returnValue.IsEmpty())
return;
if (!returnValue->IsNull() && !returnValue->IsUndefined() && event->storesResultAsString())
event->storeResult(toWebCoreString(returnValue));
if (m_isAttribute && shouldPreventDefault(returnValue))
event->preventDefault();
}