Getting access to module details on method callback from Javascript.

[cyraid]

In a C# method, calling from Javascript, is there a way to get Module (Document) information? I have a Javascript Plugin System that works off of a single V8 Engine (so that plugins can import Modules from other plugins).

It would be nice if something like this existed:

public static class SomeClass {
  [ScriptMember("someMethod")]
  public static void SomeMethod(V8DataOfSomeSort v8Data) {
    // v8Data.CurrentDocument.HostData
  } // Procedure //
} // Class //

//...

engine.AddHostType(typeof(SomeClass));

// Execute engine Module stuff here, then tie in a "HostData" (the plugin instance) to the Module on the C# side.

In Javascript (let's say were are in a Module):

SomeClass.someMethod();

I have a logging system, and it would be nice having which plugin the debug information is coming from when it outputs to the logging view.

[ClearScriptLib]

Hi @cyraid,

In a C# method, calling from Javascript, is there a way to get Module (Document) information?

There's no way to get the DocumentInfo structure for the calling script. However, with some work, you could extract the document name from the script call stack, which you can get via GetStackTrace. Or you could simply log the whole stack!

NOTE: If you're using JScript or VBScript, stack traces are only available when script debugging is enabled.

Good luck!

[cyraid]

You guys are so friendly and polite, it's crazy awesome. Keep it up guys. lol I'll see what I can do! Thanks for the nudge in a direction!

[cyraid]

And nope, I'm using V8, not JScript or VBScript.

[cyraid]

Would there be something on your end to bind to the specific variant method? Checking the parameters if it has a context/certain type? (Like in the initial above example). So when you find a method that has a:

public static class SomeClass {
  [ScriptMember("someMethod")]
  public static void SomeMethod(DocumentInfo module) {
  } // Procedure //
} // Class //

That you can pass the module in when you find / execute my class method?

[ClearScriptLib]

Hi @cyraid,

You guys are so friendly and polite, it's crazy awesome.

We appreciate your kind words!

Would there be something on your end to bind to the specific variant method?

If you're asking whether ClearScript can automatically inject arguments that provide context such as information about the calling document, the answer is no, unfortunately.

It's an interesting idea, but the method binding process is expensive and intricate – and there's a lot of contextual information – so we'd probably use some other means – perhaps thread-local data à la ScriptEngine.Current – to implement such a feature.

Cheers!

[cyraid]

I could work with that. :) (a ScriptEngine.Current access to get current Module). In the end I'm trying to track which Plugin made the callback so I can add that to Debug logs.

[smokeelow]

+1 for this one

upd: GetStackTrace() works perfectly for my use case, missed this one somehow

[ClearScriptLib]

We're tracking this feature request as Issue #682.