Re: [beta] anch-pos.lua

From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: [beta] anch-pos.lua
Date: Thu, 16 Feb 2012 22:44:09 +0100	[thread overview]
Message-ID: <4F3D78A9.8080200@wxs.nl> (raw)
In-Reply-To: <20120216180142.GA16002@phlegethon>

On 16-2-2012 19:01, Philipp Gesang wrote:
> On 2012-02-16 10:17, Hans Hagen wrote:
>> Hi,
>>
>> I uploaded a beta. Apart from some fixes, the biggest change is in
>> dealing with positional info and text backgrounds (first stage
>> cleanup).  As I have no clue to what extend users mess around with
>> background graphics themselves, it's hard to predict side effects,
>> but the biggest impact is speed. The adventurous might want to try
>> out
>
> Hi Hans,
>
> there seems to be a typo in anch-pos.lua, line 100:
>
> ·································································
> -            local r = collected[region]
> +            local r = collected[tag]
> ·································································
>
> (“region” references a boolean.)

not so much a typo but i'll add some more checks

> Here’s an example that triggers the bug and works after the
> patch is applied. I have no idea as to why this exact series of
> macros causes the issue. Please have a look at it anyways because
> the text background looks weird even after.
>
> ·································································
> \definetextbackground[tb]
> \setuptyping[
>    after={\stoptextbackground},
>    before={\starttextbackground[tb]},
> ]

add [location=paragraph]

> \starttext
>
> foo
> \starttyping
> bar
> \stoptyping
> baz
>
> \starttabulate[|r|l|]
>    \NC  foo \NC bar \AR
> \stoptabulate%

^^ missing \NC


> \stoptext
> ·································································
>
> Regards
> Philipp
>
>
>
>
>>
>> \setuptextbackground
>>    [mp=mpos:par:region,
>>     method=mpos:par:region]
>>
>> or with some more visual tracing
>>
>> \setuptextbackground
>>    [mp=mpos:par:region:kind,
>>     method=mpos:par:region]
>>
>> A simple test with some 200 backgrounds brings down runtime with one
>> second on my machine (not the fastest anyway).
>>
>> Apart from a performance gain, backgrounds are now also supported in
>> regular multicolumns as well as in some specific mechanisms like
>> tabulate and xtables. In xtables one needs to set region=yes in
>> order to get the desired results. Actually, the region key is a new
>> one in framed so anything that can be framed can also have fancy
>> text  backgrounds.
>>
>> Yet another improvement is that (although rather untested) you can
>> do things like
>>
>>      \starttextbackground[r] START
>>      \dorecurse{10}{
>>          \dorecurse{1}{\input ward }
>>          \placefigure[right]{}{}
>>          some text before BEGIN \dorecurse{2}{\input ward } END some after
>>          \placefigure[left]{}{}
>>          some text before BEGIN \dorecurse{2}{\input ward } END some after
>>          \placefigure[right]{}{}
>>          some text before BEGIN \dorecurse{2}{\input ward } END some after
>>      }
>>      STOP \stoptextbackground
>>      \dorecurse{1}{\input ward }
>>
>> and get more or less expected results. Keep in mind that it can
>> never get perfect due to all kind of possible interference. Also,
>> keep away from internals as they will quite certainly change.
>>
>> Hans
>>
>>
>>
>> -----------------------------------------------------------------
>>                                            Hans Hagen | PRAGMA ADE
>>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>>      tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
>>                                               | www.pragma-pod.nl
>> -----------------------------------------------------------------
>> ___________________________________________________________________________________
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>>
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>> ___________________________________________________________________________________
>
>
>
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________


-- 

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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___________________________________________________________________________________
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
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