CefRefPtr CefV8ValueImpl::ExecuteFunctionWithContext()

in libcef/renderer/v8_impl.cc [2360:2444]
70 lines of code
18 McCabe index (conditional complexity)

CefRefPtr<CefV8Value> CefV8ValueImpl::ExecuteFunctionWithContext(
    CefRefPtr<CefV8Context> context,
    CefRefPtr<CefV8Value> object,
    const CefV8ValueList& arguments) {
  CEF_V8_REQUIRE_OBJECT_RETURN(nullptr);

  v8::Isolate* isolate = handle_->isolate();
  v8::HandleScope handle_scope(isolate);
  v8::Local<v8::Value> value = handle_->GetNewV8Handle(false);
  if (!value->IsFunction()) {
    NOTREACHED() << "V8 value is not a function";
    return nullptr;
  }

  if (context.get() && !context->IsValid()) {
    NOTREACHED() << "invalid V8 context parameter";
    return nullptr;
  }
  if (object.get() && (!object->IsValid() || !object->IsObject())) {
    NOTREACHED() << "invalid V8 object parameter";
    return nullptr;
  }

  int argc = arguments.size();
  if (argc > 0) {
    for (int i = 0; i < argc; ++i) {
      if (!arguments[i].get() || !arguments[i]->IsValid()) {
        NOTREACHED() << "invalid V8 arguments parameter";
        return nullptr;
      }
    }
  }

  v8::Local<v8::Context> context_local;
  if (context.get()) {
    CefV8ContextImpl* context_impl =
        static_cast<CefV8ContextImpl*>(context.get());
    context_local = context_impl->GetV8Context();
  } else {
    context_local = isolate->GetCurrentContext();
  }

  v8::Context::Scope context_scope(context_local);

  v8::Local<v8::Object> obj = value->ToObject(context_local).ToLocalChecked();
  v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(obj);
  v8::Local<v8::Object> recv;

  // Default to the global object if no object was provided.
  if (object.get()) {
    CefV8ValueImpl* recv_impl = static_cast<CefV8ValueImpl*>(object.get());
    recv = v8::Local<v8::Object>::Cast(recv_impl->GetV8Value(true));
  } else {
    recv = context_local->Global();
  }

  v8::Local<v8::Value>* argv = nullptr;
  if (argc > 0) {
    argv = new v8::Local<v8::Value>[argc];
    for (int i = 0; i < argc; ++i) {
      argv[i] =
          static_cast<CefV8ValueImpl*>(arguments[i].get())->GetV8Value(true);
    }
  }

  CefRefPtr<CefV8Value> retval;

  {
    v8::TryCatch try_catch(isolate);
    try_catch.SetVerbose(true);

    v8::MaybeLocal<v8::Value> func_rv = blink_glue::CallV8Function(
        context_local, func, recv, argc, argv, handle_->isolate());

    if (!HasCaught(context_local, try_catch) && !func_rv.IsEmpty()) {
      retval =
          new CefV8ValueImpl(isolate, context_local, func_rv.ToLocalChecked());
    }
  }

  if (argv)
    delete[] argv;

  return retval;
}