Subj : [SpiderMonkey] Confused about class property
To   : netscape.public.mozilla.jseng
From : Peter Paulus
Date : Fri Sep 30 2005 05:01 pm

Hello all,

In my host class 'ColorSpace' I've added, a.o., a class property 'lab' 
with flags: JSPROP_READONLY | JSPROP_PERMANENT | JSPROP_GETTER | 
JSPROP_SHARED and a getter: getClassProperty().

This property mimics a value where in other languages one would use an 
enumeration.

My testscript contains:
var x = ColorSpace.lab;

When getClassProperty() is invoked the tinyid is correct. But the 
JSobject* obj parameter supplied, contains a Function object, instead of 
an object of class "ColorSpace".

The 'this' object retrieved from the stackframe is my global object.

I have been fiddling with the flags of JSClass and JSPropertySpec, but I 
can't seem to find how to set them correctly. Most of the time 
js_InvokeInternal() is invoked and crashes.

I do realize that there is a possibility to say in javascript:

if (ColorSpace.convert)
   {
   ...
   }
else
   {
   ...
   }

In order to check if a method exists. Can I take any actions as to 
resolve the ambiguity between getting a 'class' property and checking 
for the existence of a method.

Thank you in advance.

With kind regards,
Peter Paulus

.