How to handle multiple Tridion fields in a GUI extension?

Question

We have the ability to add, remove, and re-order items in a field per SDL Live Content(requires login).

Is there a way to get access to multiple fields in a component form from the same Custom URL pop-up?

Edit: removed alternative ideas to make question clearer.

Answer 1

You should use a similar approach as the one used in the Items Selector available in Tridion World http://www.sdltridionworld.com/community/2011_extensions/itemselector.aspx

1) You will need to register your custom URL popup as a View.

try {
    var op = window.opener;
    if (op && op.Tridion && op.Tridion.Controls && op.Tridion.Controls.Popup) {
        op.Tridion.Controls.Popup.registerView(null, window);
    }
}
catch (e) {
}

2) Access to the Windows.Opener (Component View) fields.

var args = window.dialogArguments;
    if (args) {
        // get current field value
        var value = "";
        var fields = args.getFields();
        if (fields && fields.length > 0) {
            var values = fields[0].getValues();
            if (values && values.length > 0) {
                value = values[0]
            }
        }
}