Ok. I figured out that if *v8::IndexedPropertyHandlerConfiguration *is set,
and *IndexedPropertyEnumeratorCallback *is implemented, I can configure
what is displayed on mouse over action (*Debugger.evaluateOnCallFrame *is
passed
from devtools on doing that operation.)
The implementation is provided below.
void IndexedPropertyEnumeratorCallbackFunction(
const v8::PropertyCallbackInfo<v8::Array>& p_callbackInfo)
{
v8::Local<v8::Array> IndexArray = v8::Array::New(p_callbackInfo.GetIsolate
(), 2);
IndexArray->Set(
v8::Integer::New(p_callbackInfo.GetIsolate(), 0),
v8::String::NewFromUtf8(p_callbackInfo.GetIsolate(), u8"x"));
IndexArray->Set(
v8::Integer::New(p_callbackInfo.GetIsolate(), 1),
v8::String::NewFromUtf8(p_callbackInfo.GetIsolate(), u8"y"));
p_callbackInfo.GetReturnValue().Set(IndexArray);
}
>From reading the embedder's guide, my understanding is that
> indexed property interceptors - called when accessing indexed properties.
> An example of this, in a browser environment, is document.forms.elements[0].
Why is it called on *evaluateOnCallFrame *action? Also, I tried with other
callback s of v*8::IndexedPropertyHandlerConfiguration*, but they are not
called. Can I know why? Also, since the signature of callback is as below :
void (*IndexedPropertyEnumeratorCallback)( const PropertyCallbackInfo<Array
>& info);
I can set only arrays into the result and nothing else.
I am not an expert in v8, hence these questions. Please let me know about
it/ point me to some documentation regarding this.
regards,
Anoop R. S.
On Tuesday, 8 May 2018 10:05:12 UTC+5:30, Anoop R. S. wrote:
>
> Hi All,
> I am trying out a debugger prototype using the remote debugger protocol.
> Going by the standard example in Embedder's Guide:
> C++ class:
> -------------
> class Point {
> public:
> Point(int x, int y) : x_(x), y_(y) { }
> int x_, y_;
> }
>
> Usage in JavaScript:
> ---------------------------
> var p = Point(1,2);
>
> Has anyone tried debugging a wrapped C++ object that is being returned to
> Javascript? Is it possible?
>
> regards,
> Anoop R. S.
>
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