Re: [NTG-context] xml and lua again

23 Oct 2011

      Am 22.10.2011 18:46, schrieb Thomas A. Schmitz:
...
Hi all,
again, I'm playing a bit with processing my xml in lua. I want a simple
interface for processing tables (I don't need all the power and
complexity of cals tables and want to learn something in the process).
And I thought that collecting the setups in lua might be the easiest
way, but so far, I haven't been successful. Here's an example:
\startbuffer[test]
<a>
  <nattable frame="on">
    <tr>
      <td>1</td>
      <td>2</td>
      <td>3</td>
      <td>4</td>
    </tr>
    <tr>
      <td>5</td>
      <td>6</td>
      <td>7</td>
      <td>8</td>
    </tr>
  </nattable>
</a>
\stopbuffer
\startxmlsetups xml:testsetups
    \xmlsetsetup{main}{a|nattable|tr|td|}{xml:*}
\stopxmlsetups
\xmlregistersetup{xml:testsetups}
\startxmlsetups xml:a
    \xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:nattable
    \startluacode
      framestate = lxml.att("#1", "frame")
context(type(framestate))

Here is the problem. The function lxml.att() only prints the attribute,
but returns nothing (framestate = nil). I looked into an old example of
mine where I played with attributes, but it's totally outdated (uses
xml.filters, now mkii only).

Sorry, no solution (goat milk was out).

Peter

[lxml-tex.lua]

function lxml.attribute(id,pattern,a,default)
    local collected = xmlapplylpath(getid(id),pattern)
    if collected then
        attribute(collected,a,default)
    end
end

local function attribute(collected,a,default)
    if collected and #collected > 0 then
        local at = collected[1].at
        local str = (at and at[a]) or default
        if str and str ~= "" then
            contextsprint(notcatcodes,str)
        end
    elseif default then
        contextsprint(notcatcodes,default)
    end
end
...
context(framestate)
does nothing
...
context(true)
      context.placefigure( { "here" }, "none" , function()
        context.setupTABLE( { "frame=on" } )
        context.bTABLE()
         context.xmlflush("#1")
        context.eTABLE()
      end)
    \stopluacode
\stopxmlsetups
\startxmlsetups xml:tr
    \startluacode
      context.bTR()
        context.xmlflush("#1")
      context.eTR()
    \stopluacode
\stopxmlsetups
\startxmlsetups xml:td
    \startluacode
      context.bTD()
        context.xmlflush("#1")
      context.eTD()
    \stopluacode
\stopxmlsetups
\starttext
\xmlprocessbuffer{main}{test}{}
\stoptext
question: I have the value "on" in the lua variable "framestate." But
how can I pass this on to the line
context.setupTABLE( { "frame=on" } )?
I tried something like
context.setupTABLE( { "frame=" .. framestate } )
but that doesn't work. Any suggestions?
Thomas
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Re: [NTG-context] xml and lua again

Peter Rolf