Xref: utzoo comp.sys.amiga.tech:1404 comp.sys.amiga:21484
Path: utzoo!utgpu!attcan!uunet!cbmvax!carolyn
From: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Newsgroups: comp.sys.amiga.tech,comp.sys.amiga
Subject: Re: ConUnit of current console device
Message-ID: <4420@cbmvax.UUCP>
Date: 4 Aug 88 15:18:36 GMT
References: <5403@watcgl.waterloo.edu>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Distribution: comp
Organization: Commodore Technology, West Chester, PA
Lines: 48

In article <5403@watcgl.waterloo.edu> grwalter@watcgl.waterloo.edu (Fred Walter) writes:
>[]
>
>So, how does one get a pointer to the ConUnit of the current console device ?
>I need this so that I can : a) get the current x/y position of the cursor
>                            b) get the current window size
>                            c) get at the window title (for the filename/etc)
>[]

You don't say what you have to work with.

If you have your own intuition window to which you have attached a 
console.device, the ConUnit pointer is in your iorequest after OpenDevice, 
in io_Unit.

If you are in an AmigaDOS CON: window, you must send an ACTION_DISK_INFO
packet to the console process message port.  For CLI windows (and
other CON: windows which have been fully set up as standard output for
a process, such as the windows some of my startups create), this
MsgPort is proc->pr_ConsoleTask.  For plain CON: windows, you must
extract the MsgPort from the DOS handle for the file.

file = Open(CON:...
fh = (struct FileHandle *)(file << 2);
msgport = fh->fh_Type;

For an example of sending an ACTION_DISK_INFO packet to a console msgport,
see my ConPackets.c on Fish disk 56.  Or check amiga sources group -
it may be there.  With 1.2 or greater CON: or NEWCON:, this packet
will get you both the window pointer and the io request pointer
(from which you get the ConUnit pointer).

WARNINGS:  Two gotchas

1. NIL: file handles have a NULL fh_Type (MsgPort).  Do not send a packet to
   a NULL MsgPort !

2. If your program is running in an AUX: CLI rather than a CON: or NEWCON:, 
   the packet will succeed but you get NO valid Window pointer, and
   your io_Unit will NOT be a ConUnit !  
   
-- 
==========================================================================
  Carolyn Scheppner -- CATS  Commodore Amiga Technical Support
  PHONE 215-431-9180   UUCP  ...{uunet,allegra,rutgers}!cbmvax!carolyn 

 Pad with zeros for a light, airy program.
==========================================================================