Re: [NTG-context] buffers (append)
Hi Alan,
In addition to \startbuffer \stopbuffer
it would be nice to have \startappendbuffer \stopappendbuffer.
I see that the lua function buffer.append() exists but I have not
worked-out how to add this functionality cleanly as conTeXt macros.
Here you go!
% We want to join appended pieces with a newline
% but '\n' is a bit rotten to pass inside \ctxlua
% so we simply prepare the appending function inside \startluacode, instead
\startluacode
userdata = userdata or { }
function userdata.addTempToBuffer(buffername)
buffers.append(
buffername,
'\n' .. buffers.getcontent('APPENDTEMP')
)
end
\stopluacode
\def\startappendbuffer[#1]%
{% 1: create a \stopappendbuffer that appends APPENDTEMP to the buffer #1
\def\stopappendbuffer%
{\ctxlua{userdata.addTempToBuffer('#1')}}
% 2: write the buffer to APPENDTEMP instead of overwriting buffer #1
% then addTempToBuffer will take care of the appending.
\dostartbuffer[APPENDTEMP][startappendbuffer][stopappendbuffer]}
%%% --- And here is an example --- %%%
%%% --- With my respects to Dorothy L. Sayers --- %%%
\setuplayout[backspace=6cm, leftmargin=5cm, width=11cm]
\showframe
\starttext
\startbuffer[x]
\inmargin{Harriet Vane}
Here then at home, by no more storms distrest,
Folding laborious hands we sit, wings furled;
Here in close perfume lies the rose-leaf curled,
Here the sun stands and knows not east nor west,
Here no tide runs; we have come, last and best,
From the wide zone through dizzying circles hurled,
To that still centre where the spinning world
Sleeps on its axis, to the heart of rest.
\stopbuffer
\startlines
\getbuffer[x]
\stoplines
--
\startappendbuffer[x]
\inmargin{Lord Peter Wimsey}
Lay on thy whips, O Love, that we upright,
Poised on the perilous point, in no lax bed
May sleep, as tension at the verberant core
Of music sleeps; for, if thou spare to smite,
Staggering, we stoop, stooping, fall dumb and dead,
And, dying so, sleep our sweet sleep no more.
\stopappendbuffer
\startlines
\getbuffer[x]
\stoplines
--
\typebuffer[x]
\stoptext
___
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___
[NTG-context] buffers (append)
Hello, In addition to \startbuffer \stopbuffer it would be nice to have \startappendbuffer \stopappendbuffer. I see that the lua function buffer.append() exists but I have not worked-out how to add this functionality cleanly as conTeXt macros. I imagine that this might be quite trivial for our TeX programming experts... (for once, a [useful?] suggestion that in the end will not entail many hours of work? :) Alan ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] buffers (append)
Am 14.01.2013 um 09:00 schrieb Alan BRASLAU alan.bras...@cea.fr: Hello, In addition to \startbuffer \stopbuffer it would be nice to have \startappendbuffer \stopappendbuffer. I see that the lua function buffer.append() exists but I have not worked-out how to add this functionality cleanly as conTeXt macros. I imagine that this might be quite trivial for our TeX programming experts... (for once, a [useful?] suggestion that in the end will not entail many hours of work? :) \startbuffer[a] Line 1 \stopbuffer \startbuffer[b] Line 2 \stopbuffer \starttext \startlines \getbuffer[a,b] \stoplines \stoptext Wolfgang ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] buffers (append)
On Mon, 14 Jan 2013 09:34:08 +0100 Wolfgang Schuster wolfgang.schus...@gmail.com wrote: Am 14.01.2013 um 09:00 schrieb Alan BRASLAU alan.bras...@cea.fr: Hello, In addition to \startbuffer \stopbuffer it would be nice to have \startappendbuffer \stopappendbuffer. I see that the lua function buffer.append() exists but I have not worked-out how to add this functionality cleanly as conTeXt macros. I imagine that this might be quite trivial for our TeX programming experts... (for once, a [useful?] suggestion that in the end will not entail many hours of work? :) \startbuffer[a] Line 1 \stopbuffer \startbuffer[b] Line 2 \stopbuffer \starttext \startlines \getbuffer[a,b] \stoplines \stoptext Wolfgang Thank you Wolfgang, this is useful. However, it would still be helpful to be able to generically add to a buffer without having to rename a new one. Shouldn't be very difficult but I did not find that anything like this already exists. I often think this way when I teach, adding steps to an example while repeating the previous steps. \startbuffer[a] Line 1 \stopbuffer \getbuffer[a] \startaddtobuffer[a] Line 2 \stopaddtobuffer \getbuffer[a] Alan ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
