Okay, I finally found a solution. I can return function from NamedHandler
like this:
Local<Value> ft = FunctionTemplate::New(info.GetIsolate(),
FunctionAHandler)->GetFunction();
info.GetReturnValue().Set(ft);
After that it will call function FunctionAHandler from NamedGetter and pass
all arguments to it.
I've been looking for solution for three days and found in one hour after
posting a question here. )
вторник, 11 сентября 2018 г., 16:24:27 UTC+3 пользователь Andrei Vinogradov
написал:
>
> Hello.
> I'm trying to create new template that should match required behaviour but
> now i'm stuck with NamedPropertyHandler.
> What I need to achieve:
> 1. All property access calls should be processed by unified handlers
> (getter/setter for indexed access and getter/setter for named access).
> (This part is working).
> 2. Template also should have a set of predefined functions with different
> handlers for each. (This part is not working).
>
> What I am doing. Assume that we have code like following:
>
> void NamedGetter(Local<Name> name, const PropertyCallbackInfo<Value> &info
> ) { ... }
> void NamedSetter(Local<Name> name, Local<Value> value, const
> PropertyCallbackInfo<Value> &info) { ... }
> void IndexedGetter(uint32_t index, const PropertyCallbackInfo<Value> &info
> ) { ... }
> void IndexedSetter(uint32_t index, Local<Value> value, const
> PropertyCallbackInfo<Value> &info) { ... }
> void FunctionAHandler(const FunctionCallbackInfo<Value> &info) { ... }
>
> //Lets skip initialization code...
>
> Local<String> funcName = String::NewFromUtf8(isolate, "FunctionA", v8::
> NewStringType::kNormal).ToLocalChecked();
>
> Local<ObjectTemplate> templ = ObjectTemplate::New(isolate);
> templ->Set(funcName, FunctionTemplate::New(isolate, FunctionAHandler,
> funcName));
> templ->SetHandler(NamedPropertyHandlerConfiguration(NamedGetter,
> NamedSetter));
> templ->SetHandler(IndexedPropertyHandlerConfiguration(IndexedGetter,
> IndexedSetter));
>
> //Creating instance of template in current context with name my_instance...
>
> Then, when i'm executing JS like "my_instance.FunctionA();" this is
> proccessed by V8 like i'm accessing property with name "FunctionA". I mean
> it's starting to execute NamedGetter function.
> And after that it fails with error:
>
> <unknown>:10: Uncaught TypeError: my_instance.FunctionA is not a function
>
> If I'm not adding NamedPropertyHandler to template - FunctionAHandler is
> invoked like expected.
> So my question is - how to avoid executing NamedGetter when function with
> such name is defined on template? Or maybe i't possible to proccess
> function calls inside NamedGetter and avoid creating handlers for each
> function I need in template?
> I would appreciate any help with this.
>
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