Subj : Re: Retrieving property  name in getter and setter functions
To   : JZ <jamilz@citlink.net>
From : Brendan Eich <brendan@meer.net>
Date : Fri Feb 21 2003 02:54 pm

JZ wrote:

>I'm using JS_DefineProperty to add some properties to an object. This works
>fine:
>
>    JS_DefineProperty(g_cx, aw_obj, title, init_val, AW_JS_Get, 0, 0);
>
>
>Now, how in my AW_JS_Get function can I retrieve the name of the property
>that has been executed in the users JavaScript?
>
>static JSBool AW_JS_Get(JSContext *cx, JSObject *obj, jsval id, jsval *rval)
>{
>    // need to get the name of the property here
>}
>  
>

if (JSVAL_IS_INT(id)) then the property identifier is JSVAL_TO_INT(id) 
-- an integer index.  Otherwise, you can asset that JSVAL_IS_STRING(id), 
and JSVAL_TO_STRING(id) can be passed to JS_GetStringChars and 
JS_GetStringLength to look at the string's characters.

>Alternatively, how would I pass a unique ID number for the property if I'm
>using JS_DefineProperty instead of JS_DefineProperties and a JSPropertySpec?
>

If you want to define a property with a tinyid, use 
JS_DefinePropertyWithTinyId.  Hmm, that seems to obvious ;-).

/be

>
>I'll need to do the same for my setter function.
>
>JZ
>
>
>
>  
>

.