Re: Switching to righttoleft without changing margins of delimited text

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

Great, thanks, I'll wikify. Is that lmtx-only or will it work in mkiv?

Denis
________________________________________
Von: Hans Hagen <j.hagen@xs4all.nl>
Gesendet: Montag, 13. Dezember 2021 17:42:52
An: mailing list for ConTeXt users
Cc: Maier, Denis Christian (UB)
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,
>
> I have the following example:
>
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> \setupdelimitedtext[blockquote]
>
>                  [leftmargin=1.5em,rightmargin=0em,]
>
> \starttext
>
> \input knuth
>
> \startblockquote
>
> \input knuth
>
> \stopblockquote
>
> \startblockquote
>
> \righttoleft
>
> \input knuth
>
> \stopblockquote
>
> \input knuth
>
> \stoptext
>
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> \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 can add this:

\permanent\protected\def\rtltext

{\groupedcommand{\dontleavehmode\righttoleft\ignorespaces}\removeunwantedspaces}

\permanent\protected\def\ltrtext

{\groupedcommand{\dontleavehmode\lefttoright\ignorespaces}\removeunwantedspaces}

but only when you wikify it

\startblockquote
     \rtltext{\input{knuth}}
\stopblockquote


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