Re: Switching to righttoleft without changing margins of delimited text

[Denis Maier via ntg-context <ntg-context@ntg.nl>]

Great. So another thing to wikify. I was already wondering why there was no align parameter.

Denis

> -----Ursprüngliche Nachricht-----
> Von: Hans Hagen <j.hagen@xs4all.nl>
> Gesendet: Dienstag, 14. Dezember 2021 14:09
> An: Maier, Denis Christian (UB) <denis.maier@unibe.ch>; ntg-context@ntg.nl
> Betreff: Re: AW: [NTG-context] Switching to righttoleft without changing
> margins of delimited text
> 
> On 12/14/2021 10:57 AM, denis.maier@unibe.ch wrote:
> > Hi Hans,
> >
> >  > -----Ursprüngliche Nachricht-----
> >
> >  > Von: Hans Hagen <j.hagen@xs4all.nl>
> >
> >  > Gesendet: Montag, 13. Dezember 2021 17:43
> >
> >  > An: mailing list for ConTeXt users <ntg-context@ntg.nl>
> >
> >  > Cc: Maier, Denis Christian (UB) <denis.maier@unibe.ch>
> >
> >  > Betreff: Re: [NTG-context] Switching to righttoleft without
> > changing margins
> >
> >  > of delimited text
> >
> >  >
> >
> >  > On 12/13/2021 5:25 PM, Denis Maier via ntg-context wrote:
> >
> >  > > Hi,
> >
> >  > >
> >
> > [... ]
> >
> >  > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> >
> >  > >
> >
> >  > > \righttext seems to change the locations of the margins, i.e.
> >
> >  > > leftmargin becomes rightmargin and vice-versa. That may be nice
> > in
> >
> >  > > some situations, but I need to keep the margins where they are.
> > Is
> >
> >  > > there a way to do this? (Maybe \righttoleft is the wrong
> > command?) I
> >
> >  > > thought I could define a new rtlblockquote with appropriate
> > settings, like
> >
> >  > so:
> >
> >  > >
> >
> >  > > \definedelimitedtext[rtlblockquote]
> >
> >  > >
> >
> >  > > \setupdelimitedtext[rtlblockquote]
> >
> >  > >
> >
> >  > >
> >
> >  > > [leftmargin=0em,rightmargin=1.5em,before={\righttoleft}]
> >
> >  > >
> >
> >  > > But maybe there’s a better way. Any hints?
> >
> >  > You switch directions when we're still in vertical mode, so you need:
> >
> >  >
> >
> >  > \startblockquote
> >
> >  >      \dontleavehmode\righttoleft\ignorespaces
> >
> >  >      \input knuth
> >
> >  > \stopblockquote
> >
> > I'm afraid this doesn't give the desired result. While this fixes the
> > inverted margins issue, this keeps the whole paragraph in LTR-mode.
> >
> > The expected result (created with rtlblockquote) would be this:
> >
> > So, the question remains: is a dedicated startstop-pair to achieve
> > this (what’s the proper name of those anyway? In latex these are
> > environments, but that feels odd in context)? Or are there easier solutions?
> i'll add support for the align parameter
> 
>     \usealignparameter\delimitedtextparameter
> 
> but you need to adapth left/right margins to your taste as in the bidi concept
> (being part of a line) left and rightskip swap
> 
> \definedelimitedtext
>    [mine]
>    [align={flushleft,r2l},leftmargin=3cm,rightmargin=0cm]
> 
> \starttext
>      \input tufte
>      \startmine
>          \input tufte
>      \stopmine
>      \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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