From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: break strings
Date: Mon, 13 Jun 2011 22:19:12 +0200 [thread overview]
Message-ID: <4DF670C0.1070108@wxs.nl> (raw)
In-Reply-To: <C239355E-582B-4319-B01E-08CF177773B9@googlemail.com>
On 13-6-2011 3:58, Wolfgang Schuster wrote:
>
> Am 13.06.2011 um 15:40 schrieb luigi scarso:
>
>> Where is the difference ?
>
> The TeX solution is faster.
>
> \define[1]\ThisHelps
> {\handletokens#1\with{\hskip 0pt plus .1pt\firstofoneargument}}
>
> \define[1]\ThisHelpsLuigi
> {\startluacode
> s='#1'
> s= string.gsub(s,'(.)',"\%1\\hskip 0sp plus .1pt")
> context(s)
> \stopluacode}
>
> \showframe
>
> \starttext
>
> \testfeatureonce{10000}{\ThisHelps {abcde123xyz}}%
> \testfeatureonce{10000}{\ThisHelpsLuigi{abcde123xyz}}
>
> \stoptext
A few variants ...
\startluacode
local gsub = string.gsub
function LuigiX(s)
local s = gsub(s,'.',"\%1\\hskip 0sp plus .1pt")
context(s)
end
local gmatch = string.gmatch
function LuigiY(s)
local LuigiYY = context.LuigiYY
for s in gmatch(s,".") do
LuigiYY(s)
end
end
\stopluacode
\def\ThisHelpsLuigiX#1{\ctxlua{LuigiX('#1')}}
\def\ThisHelpsLuigiY#1{\ctxlua{LuigiY('#1')}}
\def\LuigiYY#1{#1\hskip\zeropoint plus .1pt\relax}
The disadvantage of the lua way is that for long strings we end up with
a lot of data collected at the lua end that gets passed to tex. Normally
this is no real problem.
Hans
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prev parent reply other threads:[~2011-06-13 20:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-13 12:12 Steffen Wolfrum
2011-06-13 12:19 ` luigi scarso
2011-06-13 13:07 ` Steffen Wolfrum
2011-06-13 12:25 ` Wolfgang Schuster
2011-06-13 13:18 ` Steffen Wolfrum
2011-06-13 13:40 ` luigi scarso
2011-06-13 13:52 ` Steffen Wolfrum
2011-06-13 13:59 ` luigi scarso
2011-06-13 13:58 ` Wolfgang Schuster
2011-06-13 14:02 ` luigi scarso
2011-06-13 20:19 ` Hans Hagen [this message]
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