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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