distinguishing javascript functions, objects using atl
- From: "qdin" <ericyudin@xxxxxxxxx>
- Date: 16 Jan 2007 14:48:38 -0800
Not sure if this is the right group for this... feel free to suggest
another.
Is there a way to distinguish a jscript function object from other
jscript types, in ATL?
Some background:
I have a DOM containing a node of type IDispatchEx, for example
Root.SomeDispatchExObject.
This DOM is constructed in ATL, and automation compliant, so the
ActiveScript engine can access it.
In jscript I can attach any kinds of objects to this node, like so:
Root.SomeDispatchExObject.myString = "hello";
Root.SomeDispatchExObject.myNumber = 7;
Root.SomeDispatchExObject.callBack = function(){ doSomething(); }
and I can even run the callBack like this, as expected
Root.SomeDispatchExObject.callBack(); or
Root.SomeDispatchExObject.callBack.call();
Now, in ATL, after the jscript engine has run the script, I traverse
the whole DOM via IDispatch's GetTypeInfo api, and can see these new
objects.
What I want to do:
I want to be able to figure out from ATL that "callBack" is a function
object.
The problem is that when i call GetTypeAttr() on its IDispatchEx
object, it reveals 0 funcs. (the cFuncs and cVars fields of the
TYPEATTR struct are both 0).
I've tried QIing for JSGlobal::FunctionInstance, but that didn't work
either.
I've also tried GetIDsOfNames on the function "call" and then
"toString" (both of which, I believe, should be supported by jscript
objects) but that didn't work either.
Can anyone help?
thanks,
Eric
.
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