Why CUPS adds "Auto" option in "InputTray"

[yliu0131 at brockport.edu]

Michael,

Thans for the clarification.

I checked the PPD file in /etc/cups/ppd, On PS PPD files, Auto is set as DefaultInputSlot, but Auto is not an option in the list.

I guess different front end have different interpretations.
For CUPS web gui, it didn't insert any ps command.
For foomatic-rip, it uses the first option in the list (checked with foomatic-ppd). (I didn't not check the source code for foomatic-rip). Older kprinter versions shows "Auto" option while newer ones (3.2.3) does not show the "Auto" option. (I didn't check the source code for kprinter)

Is it possible to add an empty "Auto" option? So front ends won't be confused.
*InputSlot Auto: ""

Thanks
Yue

> anonymous wrote:
> > Using CUPS 1.1.21rc1.
> >
> > CUPS is adding an "Auto" option for "InputSlot".
> > For PS PPD files, it looks like it does nothing (So use the printer default
> > input tray), for foomatic-PPD files, it is using the first input tray option
> > in the list. Verified while vi /tmp/foomatic-rip.ps. I were expecting CUPS
> > to either put nothing or put the defaultInputSlot there.
> >
> > Is it a bug?
>
> No, it is a feature.  Basically, not all PPD files define an
> "auto-select" or "printer default" input slot option, so we add
> one if we don't see one in the PPD file.  After a few hundred people
> asked for this, we added the "auto" choice logic...
>
> --
> ______________________________________________________________________
> Michael Sweet, Easy Software Products           mike at easysw dot com
> Internet Printing and Publishing Software        http://www.easysw.com