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From: schoch@starnet.com (Steve Schoch)
Newsgroups: comp.windows.x,comp.windows.open-look
Subject: Re: Is there an X-enhanced `vi' ??
Message-ID: <1991Jun26.024601.5106@starnet.com>
Date: 26 Jun 91 02:46:01 GMT
References: <1991Jun25.135342.11766@aifh.ed.ac.uk>
Reply-To: schoch@bart.starnet.com (Steve Schoch)
Organization: Starnet Communication Corporation, Santa Clara, CA
Lines: 23

In article <1991Jun25.135342.11766@aifh.ed.ac.uk> gordonc@aifh.ed.ac.uk (Gordon Cameron (RA DAI)) writes:
>
>Does anyone know of a version of `vi' available which executes
>satisfactorily under X11/Xview ?? (i.e. Resizes automatically on window
>resizes etc...)

The necessary hooks to do this are already in most systems.  To have it
work, your system must do several things right:

	1)  xterm must give a new window size to the pty with the TIOCWINSIZE
	    (or something like that) ioctl.

	2)  The tty driver must give a SIGWINCH to the current process
	    when it's winsize changes.

	3)  vi must trap the SIGWINCH and redraw.  Most vi's do this.

It will work correctly on BSD 4.3.  The ioctl #define is different between
BSD 4.3 and SunOS.  One calls it TTYSIZE and one call it WINSIZE.  I believe
SunOS doesn't do number 2.  This problem can be solved by making the xterm
send the signal itself.

	Steve