[NTG-context] Re: Replacing %20 with spaces in xml attributes

[<denis.maier@unibe.ch>]

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Thanks, but I'm still getting the same error. I'm thinking that it has something to do with the percent characters...

This here works just fine:

\startluacode
function test(s)
  result = string.gsub(s, 'x20', 'MATCH')
  context(result)
end
\stopluacode

\define[1]\test{\ctxlua{test("#1")}}

\starttext
\test{asdfx20} % -> asdfMATCH
\stoptext

But this here won't:

\startluacode
function test(s)
  result = string.gsub(s, '%%20', 'MATCH')
  context(result)
end
\stopluacode

\define[1]\test{\ctxlua{test("#1")}}

\starttext
\test{asdf%20} % -> does not work
\stoptext

Any ideas?

Best,
Denis


Von: Hans van der Meer via ntg-context <ntg-context@ntg.nl>
Gesendet: Freitag, 21. Juli 2023 16:26
An: NTG ConTeXt <ntg-context@ntg.nl>
Cc: Hans van der Meer <havdmeer@ziggo.nl>
Betreff: [NTG-context] Re: Replacing %20 with spaces in xml attributes

Here in Terminal on my Mac:


21 ~: lua

Lua 5.4.6  Copyright (C) 1994-2023 Lua.org, PUC-Rio

> string.gsub('a%20b', '%%20', ' ')

a b        1

> (string.gsub('a%20b', '%%20', ' '))

a b

> ^D

21 ~:


The first call returns the 1 giving the match, the extra ()'s get rid of that second return value.


yours sincerely
dr. Hans van der Meer




On 21 Jul 2023, at 12:37, denis.maier@unibe.ch<mailto:denis.maier@unibe.ch> wrote:

Hi,

I'm typesetting an XML document where the links to the images contain spaces which are encoded as %20
<graphic xlink:href="a%20filename%20with%20spaces.jpg"/>

Using this works in cases without spaces:

\startxmlsetups xml:fig:graphic
  \externalfigure[\xmlatt{#1}{xlink:href}]
\stopxmlsetups

This also works for normal spaces, but is there a way to decode/expand the %20s to regular spaces?

I've tried with some Lua, but I don't really know how to pass data around.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\startluacode
function replaceSpaces(s)
  result = string.gsub(s, "%%20", " ")
  context(result)
end
\stopluacode

\define[1]\replaceSpaces{\ctxlua{replaceSpaces("#1")}}

\startxmlsetups xml:fig:graphic
  \externalfigure[\replaceSpaces{\xmlatt{#1}{xlink:href}}]
\stopxmlsetups
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Any hints, why this does not work?`

Also, maybe there's a simpler way for this kind of scenario?

Best,
Denis
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