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Date: Wed, 19 Oct 2005 17:48:53 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Robert Bram <Robert DOT Bram AT colesmyer DOT com DOT au>
cc: cygwin AT cygwin DOT com
Subject: RE: exiting vim changes background colour of console
In-Reply-To: <88ACCA0E0A7A914DAFBA3918021605D24E3FD3@WPEXCH08.colesmyer.ad.cmltd.net.au>
Message-ID: <Pine.GSO.4.63.0510191738270.409@slinky.cs.nyu.edu>
References: <88ACCA0E0A7A914DAFBA3918021605D24E3FD3 AT WPEXCH08 DOT colesmyer DOT ad DOT cmltd DOT net DOT au>
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On Thu, 20 Oct 2005, Robert Bram wrote:

> Hi Igor,
>
> > > > > > > ==
> > > > > > > I am finding that when I exit from vim, it turns my background
> > > > > > > back into black (which is how I had it before I tried changing
> > > > > > > it today). Is there a setting or something I have forgotten to
> > > > > > > change?
> > > > > > > ==
> > > > > > > Actually this is happenning not just after vim.. but even after
> > > > > > > I exit "less"!
> > > > > >
> > > > > > Works for me.  Did you close the console window and re-open one after
> > > > > > changing the colors?  Before doing this, the console colors are known
> > > > > > to be scrambled as you describe above.
> > > > >
> > > > > Yes I closed and re-opened the console and the problem recurs. :-/
> > > >
> > > > vim (and less, since you seem to have the same problem there) use
> > > > something called an "alternate screen".  This is a feature of the terminal
> > > > that allows the program to make arbitrary modifications to the terminal
> > > > screen that will be undone when the program switches back to the main
> > > > screen.  In particular, any color changes will be undone.  Consequently,
> > > > if you wish to change the color of the main screen, don't do this while
> > > > running vim or less.
> > > > HTH,
> > >
> > > I admit to being somewhat confused by your remark - I didn't change the
> > > screen while running vim or less. I edited the properties of the console
> > > so that it would affect all consoles with the same name, changed the PS1
> > > environment variable in my .bash_profile, closed the console, re-opened
> > > it, ran vim and/or less, exited vim and/or less and then found the
> > > console colors changed. Have I misunderstood your point?
> > >
> > > Interestingly, I find that I can keep pressing ENTER and 'clear' the
> > > screen back to how it was, but this is an ugly solution.
> >
> > What is the value of your PS1 variable?  Does it, perhaps, contain the
> > code at the end that resets the background?  That was the only way I could
> > reproduce the behavior you report on my machine.
>
> My PS1 variable is:
> \e[47m\n\s\v User \u on host \h in dir \w\n\d \@>\e[0;30m
>
> bash2.05b User rbram on host cml035835 in dir /cygdrive/c/eTech/eForms2
> Thu Oct 20 07:16 AM> echo $PS1
> \e[47m\n\s\v User \u on host \h in dir \w\n\d \@>\e[0;30m

Note that the end of your PS1 resets the color to "black background"...
Removing that '\e[0;30m' should fix your problem, unless you want your
window background to be something other than grey, in which case you'll
have to put in a background change to whatever your window background is.

FWIW, you might also want to put \[ and \] around the non-printable
characters in PS1, to help bash calculate the prompt length better, e.g.,

export PS1='\[\e[47m\]\n\s\v User \u on host \h in dir \w\n\d \@>'

HTH,
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
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ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

If there's any real truth it's that the entire multidimensional infinity
of the Universe is almost certainly being run by a bunch of maniacs. /DA

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