> On 04.09.16, at 16:28, Florian Leupold <fleupold@posteo.net> wrote:
> 
> 
>> On 04.09.16, at 14:14, Hans Hagen <pragma@wxs.nl> wrote:
>> 
>> On 9/4/2016 12:03 PM, Hans Hagen wrote:
>> 
>>> \definebar[ClozedBar][underbar][continue=yes]
>>> 
>>> \unexpanded\def\Clozed#1{\ClozedBar{\zwj#1\zwj}}
>>> 
>>> \starttext
>>> 
>>> \input ward
>>> \Clozed{\color[red]{CLOZE 1}}
>>> \input ward
>>> \Clozed{\quad\color[red]{CLOZE 2}\quad}
>>> \input ward
>>> \Clozed{\color[white]{x}\quad\color[red]{CLOZE 3}\quad\color[white]{x}}
>>> \input ward
>>> \Clozed{\color[green]{x}\quad\color[red]{CLOZE 4}\quad\color[white]{x}}
>>> \input ward
>>> space \Clozed{\color[red]{CLOZE 5}\qquad\color[white]{x}} space
>>> \input ward
>>> 
>>> \stoptext
>> 
>> in next beta you can specify an empty option which will remove the text (otherwise one can still copy it from the pdf):
>> 
>> \definebar[ClozedBar][underbar][continue=yes,empty=yes]
>> 
>> 
>> -----------------------------------------------------------------
>>                                         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://tex.aanhet.net
>> archive  : http://foundry.supelec.fr/projects/contextrev/
>> wiki     : http://contextgarden.net
>> ___________________________________________________________________________________
> 
> Dear Hans,
> 
> thanks a lot for your solution!
> 
> I have added "color=black” to \definebar to prevent the bar’s color from changing at a line break, which happens otherwise:
> 
> \definebar[ClozedBar][underbar][continue=yes]
> %\definebar[ClozedBar][underbar][continue=yes, color=black]
> \unexpanded\def\Clozed#1{\ClozedBar{\zwj\quad#1\quad\zwj}}
> \starttext
> \Clozed{\color[red]{CLOZE 1}} text text text text text text text text text text text
> \Clozed{\color[red]{CLOZE 2 CLOZE 2}}
> \stoptext
> 
> Now the extra space is hardcoded by \quad. I guess it’s not so easy then to make the underbar’s width a factor times the input text width? Or, alternatively, an explicitly given width?
> 
> Cheers,
> Florian
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________

ADDENDUM:

There is still another problem: The fixed leading space may be eaten away by a line break.

\definebar[ClozedBar][underbar][continue=yes, color=black]
\unexpanded\def\Clozed#1{\ClozedBar{\zwj\quad#1\quad\zwj}}

\starttext
\Clozed{\color[red]{CLOZE 1}} text text text text text text text text text text text text text
\Clozed{\color[red]{CLOZE 2 CLOZE 2}}
\stoptext