April 2010 - ntg-context - NTG Mailing Lists

Re: [NTG-context] callback.register
by Wolfgang Werners-Lucchini 09 Apr '10

09 Apr '10

> Hello, > > Here a patch for luat-cbk.lua: > > function callbacks.register(name,func,freeze) > if frozen[name] then > if trace_callbacks then > frozenmessage("registering",name) > end > return nil, name .. " is frozen" > elseif freeze then > frozen[name] = (type(freeze) == "string" and freeze) or > "registered" > return register_callback(name,func) > else > return register_callback(name,func) > end > end > > function callback.register(name,func) -- original > if frozen[name] then > if trace_callbacks then > frozenmessage("registering",name) > end > return nil, name .. " is frozen" > else > return register_callback(name,func) > end > end > > (Untested...) > > Cheers, Peter and function callbacks.report() local list = callback.list() for name, func in table.sortedpairs(list) do local str = frozen[name] if str then logs.report("callbacks","%s: %s -> %s",state(name),name,str) else logs.report("callbacks","%s: %s",state(name),name) end end end Wolfgang

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error messages for callback.register
by Peter Münster 09 Apr '10

09 Apr '10

Hello, Here a patch for luat-cbk.lua: function callbacks.register(name,func,freeze) if frozen[name] then if trace_callbacks then frozenmessage("registering",name) end return nil, name .. " is frozen" elseif freeze then frozen[name] = (type(freeze) == "string" and freeze) or "registered" return register_callback(name,func) else return register_callback(name,func) end end function callback.register(name,func) -- original if frozen[name] then if trace_callbacks then frozenmessage("registering",name) end return nil, name .. " is frozen" else return register_callback(name,func) end end (Untested...) Cheers, Peter -- Contact information: http://pmrb.free.fr/contact/

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Re: [NTG-context] callback.register
by Wolfgang Werners-Lucchini 09 Apr '10

09 Apr '10

> > I tried the following > > > > -------------------------------------- > > \starttext > > \startluacode > > local OldPreLB > > > > function MyPreLB(head,gc) > > ?texio.write_nl("########### Here I am!") > > ?OldPreLB(head,gc) > > end > > > > OldPreLB = callback.find('pre_linebreak_filter') > > callback.register('pre_linebreak_filter',MyPreLB) > > \stopluacode > > > > Test > > \stoptext > > -------------------------------------- > > > > but MyPreLB() is not called. > > What I am doing wrong here? > > Hi Wolfgang, > > see http://www.ntg.nl/pipermail/ntg-context/2010/047018.html > > -- > Best regards, > > Li Yanrui (???) I see! >From the info found there ----------------------------------------- there are two user hooks: tasks.appendaction("processors","before","modules.mine.whatever_a") tasks.appendaction("processors","after","modules.mine.whatever_b") ----------------------------------------- it is not clear for me how to use this. So it seems that the luatex reference is useless for a context user. Is there an other documentation on this? I have found an other mechanism in 'luat-cbk.lua' which offers a pair of functions 'callbacks.push()' and 'callbacks.pop()'. But I have not made any attempts to use them. Are they useable or are they disabled too? Wolfgang

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Re: [NTG-context] How can one center or align a float?
by Vyatcheslav Yatskovsky 08 Apr '10

08 Apr '10

Hi, > How is it possible to have a STEPchart be midaligned, or right-aligned, Another way: \startnarrower[6*left] \getbuffer \stopnarrower -- Best Regards, Vyatcheslav Yatskovsky

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How can one center or align a float?
by Otared Kavian 08 Apr '10

08 Apr '10

Hi all, How is it possible to have a STEPchart be midaligned, or right-aligned, as one may do this with figures, tables, and FLOWcharts? An example is here: %%%%%%%%%%%% \usemodule[steps,mathml] \starttext \startbuffer[test-chart] \startSTEPtable \cell {$c=2a+3b$} \text {with $a=5$} \cell {$c=10+3b$} \text {and $b=6$} \cell {$c=10+18$} \text {we get} \cell {$c=28$} \stopSTEPtable \stopbuffer How can one center the following \type{\STEPchart}? \getbuffer[test-chart] \stoptext %%%%%%%%%%%% I should add that \startalignment[middle], or \placefigure do not have any influence on the alignment of the above example. Thanks in advance an best regards: OK

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callback.register
by Wolfgang Werners-Lucchini 08 Apr '10

08 Apr '10

Hallo, I tried the following -------------------------------------- \starttext \startluacode local OldPreLB function MyPreLB(head,gc) texio.write_nl("########### Here I am!") OldPreLB(head,gc) end OldPreLB = callback.find('pre_linebreak_filter') callback.register('pre_linebreak_filter',MyPreLB) \stopluacode Test \stoptext -------------------------------------- but MyPreLB() is not called. What I am doing wrong here? Wolfgang

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Multiple bibliographies (bib-module, mkiv)
by marfin 08 Apr '10

08 Apr '10

Hello, I need two bibliographies for my document, »Primary sources« and »Secondary sources«. Two bibliographies was created and loaded with \setupbibtex[database={prim,sec}]. But for the last step in my intention I’m looking for something to the effect that \placepublications[database=prim] or in a similar manner to \nocite{*} for every bib-database. Is there any solution or workaround? Thanks Markus

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page layout
by Sebastien Mengin 08 Apr '10

08 Apr '10

Hi, Say I want to typeset a 10 x 18 cm book and print proofs on a A4 paper. Margins : top = 1cm bottom = 1.5cm left & right = 1cm I'd like crop marks to. My attempts based on the docs fail. Sorry, but this simple request is not easy to deduce directly from the beginners doc -- although I translated the chapter about page layout (sigh...) Thanks in advance. -- Sébastien Mengin Édition et logiciels libres < Mise en page avec LaTeX > http://edilibre.net

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Re: [NTG-context] \bigl \bigr \big problems
by Hans Hagen 08 Apr '10

08 Apr '10

On 8-4-2010 10:37, Mikael Persson wrote: > Thanks for you answer and explanation. Is there a reason why you do > not add \| to get double bars? This is the way it is done in LaTeX > (OK, not really an argument). I'm just curious. we never had \| in mkii and in mkiv it's equivalent to | (just like \$ is $ and not two $'s) .. i can find no reason for an escaped | being two |'s Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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Re: [NTG-context] \bigl \bigr \big problems
by Mikael Persson 08 Apr '10

08 Apr '10

On Thu, Apr 8, 2010 at 10:37 AM, Mikael Persson <mickep(a)gmail.com> wrote: > On Thu, Apr 8, 2010 at 10:31 AM, Hans Hagen <pragma(a)wxs.nl> wrote: >> On 8-4-2010 7:40, Mikael Persson wrote: >> >>> Ok Hans, with the beta from yesterday the absolute values change size, >>> but there are some problems still: >>> >>> 1) The absolute value bars are not just "straight lines" when using >>> \big and friends, but som kind of line that is thicker in the middle. >>> (zoom i on attached pdf) >> >> this is because lm has no such characters so they are made from the smaller >> ones (extensible characters) >> >> in traditional lm this can go unniticed (depends a bit in the exact >> definition but in mkii you will see two stacked | just not touching but in >> mkiv we use overlap - which is custom in opentype anyway); so what you >> observe is an artefact of the viewer - it might be that future versions of >> luatex deal better with this as it relates somewhat with how things are >> dealt with in the backend but you will observe similar effects in pdftex >> >> in an earlier version i used rules but then found out that the | has round >> tops (ok, i could use pdf literals to draw lines but not today) >> >>> 2) The horizontal spacing in the \big version seems to be bigger than >>> for the \bigl/\bigr version (and similar for \Big vs \Bigl/\Bigr). I'd >>> expect the same spacing (the l and r are just there for the writer to >>> easily see what is left and what is right). >> >> repaired .. (i also added \plainbigmathmode >> >>> 3) I'd expect that \| gives double bars, like the || one get from >>> \Vert and not |. This is not so (see the attached file). Moreover, it >>> is not possible to do \bigl\Vert right now to get a bigger ||. >> >> i've added double bars so this works: >> >> $\biggl\Vert x^n\biggr\Vert$ >> $\biggl{||} x^n\biggr{||}$ >> $\biggl|\biggl| x^n\biggr|\biggr|$ >> >> there will be a new beta later today or tomorrow >> >> Hans Thanks for you answer and explanation. Is there a reason why you do not add \| to get double bars? This is the way it is done in LaTeX (OK, not really an argument). I'm just curious. Mikael

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