Patch: plugin/gzip.vim, maintain compression levels

Wed, 18 May 2005 20:31:06 +0200

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James -

> On Mon, May 16, 2005 at 05:11:42PM +0200, Bram Moolenaar wrote:
> > > The patch adds support for maintaining the compression level when
> > > editing a .gz file.  If the gzip file was compressed using "max speed"
> > > or "max compression", Vim will detect and use that compression level.
> > > Otherwise, the default compression level is used (as before).
> >
> > Using an external command is a weird solution, the text is right there
> > in the Vim buffer.  You can use Vim commands to get the byte.
> 
> Thanks for pointing out the (now obvious) idea of using Vim to get the
> correct bytes.  I've attached an updated patch which does this.

I'm afraid I have given you a wrong hint.  When appending the compressed
file is not in a buffer, thus then it doesn't work.  And that's when it
would be most useful.

For Vim 7 we can use the readfile() function.  I don't know a simple,
portable solution for Vim 6.3.

There would be an error when using ":w file.gz", b:compression would not
be set.  It's easy to add a check for that:

      if exists("b:compression")
	call system(a:cmd . " " . b:compression . " " . nmt)
      else
	call system(a:cmd . " " . nmt)
      endif

Attached is my modified version of the plugin.  It seems to work OK for
writing and appending with Vim 7.

- Bram

- 
To the optimist, the glass is half full.
To the pessimist, the glass is half empty.
To the engineer, the glass is twice as big as it needs to be.

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
///        Sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\              Project leader for A-A-P -- http://www.A-A-P.org        ///
 \\\     Buy LOTR 3 and help AIDS victims -- http://ICCF.nl/lotr.html   ///

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