* strange behavior with \groupedcommand in recent versions of LMTX
@ 2020-09-01 15:47 mf
2020-09-01 17:22 ` Hans Hagen
0 siblings, 1 reply; 4+ messages in thread
From: mf @ 2020-09-01 15:47 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hello list,
this is a MWE that worked right in MkIV and in LMTX versions (at least)
until April 22nd, 2020.
There's a macro, \wordorparagraphright, that takes one argument, makes a
hbox with it and measures its width
- if its width is less than \hsize, then it calls \wordright
- if its width is more than \hsize, then it ends the current paragraph
and starts a right-aligned paragraph with the argument
There are two implementations in the MWE: one is through
\groupedcommand, and that's the one that worked once and doesn't now.
----------------------------------------------------
\unexpanded\def\groupedwordorparagraphright{\dosingleempty\dogroupedwordorparagraphright}
\def\dogroupedwordorparagraphright[#1]{\groupedcommand{\setbox\scratchbox\hbox\bgroup}
{\egroup\ifdim\wd\scratchbox < \hsize
\wordright{\unhbox\scratchbox}
\else
\par\penalty10000
\startalignment[flushright]\unhbox\scratchbox\stopalignment
\fi}}
\unexpanded\def\wordorparagraphright#1{%
\setbox\scratchbox\hbox{#1}
\ifdim\wd\scratchbox < \hsize
\wordright{#1}
\else
\par\penalty10000
\startalignment[flushright]\unhbox\scratchbox\stopalignment
\fi}
\starttext
\type{\wordorparagraphright} should use \type{\wordright} if its argument
is narrower than \type{\hsize}, or make a right-aligned paragraph with it
when it's wider.
Below, \type{\wordorparagraphright} is tested with a short text, that
has enough room on the same line.
\blank
Reference:
\input ward\wordright{same line, right}
\blank
Implementation as a grouped command (it doesn't work):
\input ward\groupedwordorparagraphright{same line, right}
\blank
Normal implementation, not as a grouped command (it works):
\input ward\wordorparagraphright{same line, right}
\stoptext
----------------------------------------------------
Unfortunately the grouped version is the one I need, because it's used
in a register, and it would give an error if not defined through
\groupedcommand:
\setupregister[myregister]
[pageleft=\wordorparagraphright\bgroup,pageright=\egroup]
TIA,
Massi
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: strange behavior with \groupedcommand in recent versions of LMTX
2020-09-01 15:47 strange behavior with \groupedcommand in recent versions of LMTX mf
@ 2020-09-01 17:22 ` Hans Hagen
2020-09-02 9:10 ` mf
0 siblings, 1 reply; 4+ messages in thread
From: Hans Hagen @ 2020-09-01 17:22 UTC (permalink / raw)
To: mailing list for ConTeXt users, mf
On 9/1/2020 5:47 PM, mf wrote:
> \unexpanded\def\groupedwordorparagraphright{\dosingleempty\dogroupedwordorparagraphright}
>
> \def\dogroupedwordorparagraphright[#1]{\groupedcommand{\setbox\scratchbox\hbox\bgroup}
>
> {\egroup\ifdim\wd\scratchbox < \hsize
> \wordright{\unhbox\scratchbox}
> \else
> \par\penalty10000
> \startalignment[flushright]\unhbox\scratchbox\stopalignment
> \fi}}
>
> \unexpanded\def\wordorparagraphright#1{%
> \setbox\scratchbox\hbox{#1}
> \ifdim\wd\scratchbox < \hsize
> \wordright{#1}
> \else
> \par\penalty10000
> \startalignment[flushright]\unhbox\scratchbox\stopalignment
> \fi}
>
> \starttext
> \type{\wordorparagraphright} should use \type{\wordright} if its
> argument
> is narrower than \type{\hsize}, or make a right-aligned paragraph
> with it
> when it's wider.
>
> Below, \type{\wordorparagraphright} is tested with a short text, that
> has enough room on the same line.
> \blank
>
> Reference:
>
> \input ward\wordright{same line, right}
>
> \blank
>
> Implementation as a grouped command (it doesn't work):
>
> \input ward\groupedwordorparagraphright{same line, right}
>
> \blank
>
> Normal implementation, not as a grouped command (it works):
>
> \input ward\wordorparagraphright{same line, right}
> \stoptext
> ----------------------------------------------------
>
> Unfortunately the grouped version is the one I need, because it's used
> in a register, and it would give an error if not defined through
> \groupedcommand:
>
> \setupregister[myregister]
> [pageleft=\wordorparagraphright\bgroup,pageright=\egroup]
fortunately there is a solution that takes less code:
\unexpanded\def\whatever
{\dosingleempty\dowhatever}
\def\dowhatever[#1]%
{\dowithnextbox
{\ifdim\wd\nextbox<\hsize
\wordright{\box\nextbox}%
\par
\else
\par
\penalty10000
\startalignment[flushright]\unhbox\nextbox\stopalignment
\fi}\hbox}
\starttext
\input ward \whatever{same line, right}
\blank
\input ward \whatever{\input tufte }
\stoptext
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: strange behavior with \groupedcommand in recent versions of LMTX
2020-09-01 17:22 ` Hans Hagen
@ 2020-09-02 9:10 ` mf
2020-09-02 11:24 ` Hans Hagen
0 siblings, 1 reply; 4+ messages in thread
From: mf @ 2020-09-02 9:10 UTC (permalink / raw)
To: Hans Hagen, mailing list for ConTeXt users
Thanks Hans,
this solves the problem I had with the new implementation of \wordright.
It's not exactly a problem of \wordright, but the combination with
\groupedcommand.
Is \nextbox a new entry of latest versions?
I've seen also \nextboxwd, \nextboxht, etc.
So you can measure the next box to come in advance. Is it like that?
Is it a vbox when you're in vertical mode and a hbox when you are in
horizontal mode?
Is this interpretation of \dowithnextbox in \dowhatever right?
\dowithnextbox {.1.} \.2. {.3.}
1 COMMAND = {\ifdim\wd\nextbox<\hsize...}
2 CSNAME = \hbox
3 CONTENT = {#1}
Massi
Il 01/09/20 19:22, Hans Hagen ha scritto:
>
> fortunately there is a solution that takes less code:
>
> \unexpanded\def\whatever
> {\dosingleempty\dowhatever}
>
> \def\dowhatever[#1]%
> {\dowithnextbox
> {\ifdim\wd\nextbox<\hsize
> \wordright{\box\nextbox}%
> \par
> \else
> \par
> \penalty10000
> \startalignment[flushright]\unhbox\nextbox\stopalignment
> \fi}\hbox}
>
> \starttext
>
> \input ward \whatever{same line, right}
>
> \blank
>
> \input ward \whatever{\input tufte }
>
> \stoptext
>
___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: strange behavior with \groupedcommand in recent versions of LMTX
2020-09-02 9:10 ` mf
@ 2020-09-02 11:24 ` Hans Hagen
0 siblings, 0 replies; 4+ messages in thread
From: Hans Hagen @ 2020-09-02 11:24 UTC (permalink / raw)
To: mf, mailing list for ConTeXt users
On 9/2/2020 11:10 AM, mf wrote:
> Thanks Hans,
> this solves the problem I had with the new implementation of \wordright.
> It's not exactly a problem of \wordright, but the combination with
> \groupedcommand.
that is always tricky as what happens is postponing till the group ends
but wordright now kind of hooks into the par construction
> Is \nextbox a new entry of latest versions?
no, actually one of the oldest things
> I've seen also \nextboxwd, \nextboxht, etc.
> So you can measure the next box to come in advance. Is it like that?
>
> Is it a vbox when you're in vertical mode and a hbox when you are in
> horizontal mode?
you just pass the box
> Is this interpretation of \dowithnextbox in \dowhatever right?
>
> \dowithnextbox {.1.} \.2. {.3.}
> 1 COMMAND = {\ifdim\wd\nextbox<\hsize...}
> 2 CSNAME = \hbox or \vbox
> 3 CONTENT = {#1}
yes
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
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://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
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2020-09-01 15:47 strange behavior with \groupedcommand in recent versions of LMTX mf
2020-09-01 17:22 ` Hans Hagen
2020-09-02 9:10 ` mf
2020-09-02 11:24 ` Hans Hagen
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