bool invokeCallback(v8::Persistent<v8::Object> callback, int argc, v8::Handle<v8::Value> argv[], bool& callbackReturnValue)
{
// FIXME: If an exception was thrown by the callback, we should report it
v8::TryCatch exceptionCatcher;
v8::Local<v8::Function> callbackFunction;
if (callback->IsFunction()) {
callbackFunction = v8::Local<v8::Function>::New(v8::Persistent<v8::Function>::Cast(callback));
} else if (callback->IsObject()) {
v8::Local<v8::Value> handleEventFunction = callback->Get(v8::String::NewSymbol("handleEvent"));
if (handleEventFunction->IsFunction()) {
callbackFunction = v8::Local<v8::Function>::Cast(handleEventFunction);
}
} else
return false;
if (callbackFunction.IsEmpty())
return false;
v8::Handle<v8::Object> thisObject = v8::Context::GetCurrent()->Global();
V8Proxy* proxy = V8Proxy::retrieve();
ASSERT(proxy);
v8::Handle<v8::Value> result = proxy->CallFunction(callbackFunction, thisObject, argc, argv);
callbackReturnValue = result.IsEmpty() && result->IsBoolean() && result->BooleanValue();
return exceptionCatcher.HasCaught();
}
String JSNSResolver::lookupNamespaceURI(ExceptionContext* exceptionContext,
const String& prefix)
{
v8::Handle<v8::Function> lookupNamespaceURIFunc;
v8::Handle<v8::String> lookupNamespaceURIName =
v8::String::New("lookupNamespaceURI");
// Check if the resolver has a function property named lookupNamespaceURI.
if (m_resolver->Has(lookupNamespaceURIName)) {
// In case the property is a getter that throws an error,
// see LayoutTests/fast/dom/SelectorAPI/NSResolver-exceptions.xhtml
ExceptionCatcher exceptionCatcher(exceptionContext);
v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(
lookupNamespaceURIName);
if (exceptionContext->hadException())
return String();
if (lookupNamespaceURI->IsFunction()) {
lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(
lookupNamespaceURI);
}
}
if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) {
Frame* frame = ScriptController::retrieveActiveFrame();
log_info(frame, "NSResolver does not have a lookupNamespaceURI method.",
String());
return String();
}
// Catch exceptions from calling the namespace resolver.
ExceptionCatcher exceptionCatcher(exceptionContext);
const int argc = 1;
v8::Handle<v8::Value> argv[argc] = { v8String(prefix) };
v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty()
? v8::Handle<v8::Function>::Cast(m_resolver)
: lookupNamespaceURIFunc;
V8Proxy* proxy = V8Proxy::retrieve();
v8::Handle<v8::Value> retval = proxy->CallFunction(function, m_resolver,
argc, argv);
// Eat exceptions from namespace resolver and return an empty string. This
// will cause NAMESPACE_ERR.
if (exceptionContext->hadException())
return String();
return valueToStringWithNullOrUndefinedCheck(retval);
}
String JSXPathNSResolver::lookupNamespaceURI(const String& prefix) {
v8::Handle<v8::Function> lookupNamespaceURIFunc;
v8::Handle<v8::String> lookupNamespaceURIName = v8::String::New("lookupNamespaceURI");
// Check if the resolver has a function property named lookupNamespaceURI.
if (m_resolver->Has(lookupNamespaceURIName)) {
v8::Handle<v8::Value> lookupNamespaceURI = m_resolver->Get(lookupNamespaceURIName);
if (lookupNamespaceURI->IsFunction()) {
lookupNamespaceURIFunc = v8::Handle<v8::Function>::Cast(lookupNamespaceURI);
}
}
if (lookupNamespaceURIFunc.IsEmpty() && !m_resolver->IsFunction()) {
Frame* frame = V8Proxy::retrieveFrameForEnteredContext();
log_info(frame, "XPathNSResolver does not have a lookupNamespaceURI method.", String());
return String();
}
// Catch exceptions from calling the namespace resolver.
v8::TryCatch try_catch;
try_catch.SetVerbose(true); // Print exceptions to console.
const int argc = 1;
v8::Handle<v8::Value> argv[argc] = { v8String(prefix) };
v8::Handle<v8::Function> function = lookupNamespaceURIFunc.IsEmpty()
? v8::Handle<v8::Function>::Cast(m_resolver)
: lookupNamespaceURIFunc;
V8Proxy* proxy = V8Proxy::retrieve();
v8::Handle<v8::Value> retval = proxy->CallFunction(function, m_resolver, argc, argv);
// Eat exceptions from namespace resolver and return an empty string. This
// will most likely cause NAMESPACE_ERR.
if (try_catch.HasCaught()) {
return String();
}
return valueToStringWithNullCheck(retval);
}