Subj : _setProperty function get id=1?
To   : netscape.public.mozilla.jseng
From : Weiyang Zhou
Date : Sun Aug 14 2005 03:07 am

I have a strange problem. With the following code:

static JSBool menuItem_setProperty(JSContext *cx, JSObject *obj, jsval id, 
jsval *vp)
{
    if( JSVAL_IS_STRING(id) )
    {
        .....
    }
    return JS_TRUE;
}

static JSClass menuItem_class =
{
    "_Gui_MenuItem",
    JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE,
    JS_PropertyStub,
    JS_PropertyStub,
    menuItem_getProperty,
    menuItem_setProperty,
    JS_EnumerateStub,
    JS_ResolveStub,
    JS_ConvertStub,
    menuItem_finalize,
    JSCLASS_NO_OPTIONAL_MEMBERS
};

enum menuItem_tinyid
{
    menuItem_text,
};

static JSPropertySpec menuItem_props[] =
{
    {"text",            menuItem_text,          JSPROP_ENUMERATE},
    {0}
};


    JS_InitClass(
        cx,
        obj,
        NULL,
        &menuItem_class,
        _Gui_MenuItem,
        menuItem_class_ctor_nargs,
        menuItem_props,
        menuItem_methods,
        NULL,
        NULL
        );


But whenever I tried to access the "text" property from JavaScript like;

menuItem.text = "something";

menuItem_setProperty() will be called, but the 3rd parameter id always has 
value 1 and it fails the JSVAL_IS_STRING(id) test. So I can not set the 
value.
I have traced into line 2967 of jsobj.c, the code that calls 
menuItem_setProperty();

    if (!SPROP_SET(cx, sprop, obj, obj, vp))
        return JS_FALSE;

cx, sprop, obj, and vp seem to be fine there.

Does anyone know why? Desperately need some help.

Thanks a lot
Weiyang

.