linux-kernel - Re: [OT] Vim highlighting for trailing spaces

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Date:	Fri, 29 Jun 2007 08:49:42 -0400
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Michael Tokarev" <mjt@....msk.ru>
Cc:	"Kyle Moffett" <mrmacman_g4@....com>,
	"Dave Young" <hidave.darkstar@...il.com>,
	"Li Yang-r58472" <LeoLi@...escale.com>,
	"Josh Triplett" <josh@...nel.org>,
	"Jan Engelhardt" <jengelh@...putergmbh.de>,
	"Chris Shoemaker" <c.shoemaker@....net>,
	"Josh Triplett" <josht@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [OT] Vim highlighting for trailing spaces

On 6/29/07, Michael Tokarev <mjt@....msk.ru> wrote:
> Kyle Moffett wrote:
> > On Jun 28, 2007, at 03:20:24, Dave Young wrote:
> >> And for vim trailing space, there's a tip in vim.org:
> >> http://www.vim.org/tips/tip.php?tip_id=878
> >
> > I actually prefer this (in .vimrc):
> >
> > " Show trailing whitespace and spaces before tabs
> > hi link localWhitespaceError Error
> > au Syntax * syn match localWhitespaceError /\(\zs\%#\|\s\)\+$/ display
> > au Syntax * syn match localWhitespaceError / \+\ze\t/ display
> >
> > It always displays trailing whitespace and spaces-before tabs... except
> > if your cursor is at the end of the whitespace.  The updating is
> > occasionally a bit laggy (EG: Put spaces on a line and then move the
> > cursor off it without pressing <ENTER>), but when you hit Ctrl-L, enter,
> > or edit an adjacent line then it updates.
>
> Stolen from an old message in LKML - I don't remember who's the author:
>
> highlight WhitespaceEOL ctermbg=red guibg=red
> match WhitespaceEOL /\s\+$/
>
> Works without any glitches here (not "laggy").  But I don't use
> syntax coloring - never tried if it works with coloring or not.
>

That only highlights whitespace at the end of the lines. You might
want to use pattern below to also highlight "tab after space" in the
middle of the line:

:highlight RedundantSpaces ctermbg=red guibg=red
:match RedundantSpaces /\s\+$\| \+\ze\t/

-- 
Dmitry
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