no leavevmode

no leavevmode

[Hans van der Meer]

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Why is there not implemented in \subsection a \leavevmode at the end of it? Here a minimal example showing that starting with the first word in an \hbox encounters vertical mode. Thus requiring a \leavevmode to put it on line with the following text. Whereas not starting with an \hbox does an implicite switch to horizontal mode.
I can imagine that this behaviour could be confusing for users not well versed in the different behaviour of the horizontal and vertical modes.
Therefore my question: Wouldn't it be wise to implement that \leavevmode?

\startsubsection[title=TEST]
\hbox{abc} def\crlf
ghi jkl xyz
\stopsubsection


dr. Hans van der Meer



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Re: no leavevmode

[Hans Hagen]

On 5/27/2021 10:43 PM, Hans van der Meer wrote:
> Why is there not implemented in \subsection a \leavevmode at the end of 
> it? Here a minimal example showing that starting with the first word in 
> an \hbox encounters vertical mode. Thus requiring a \leavevmode to put 
> it on line with the following text. Whereas not starting with an \hbox 
> does an implicite switch to horizontal mode.
> I can imagine that this behaviour could be confusing for users not well 
> versed in the different behaviour of the horizontal and vertical modes.
> Therefore my question: Wouldn't it be wise to implement that \leavevmode?
> 
> \startsubsection[title=TEST]
> \hbox{abc} def\crlf
> ghi jkl xyz
> \stopsubsection
first of all, context never uses (and used) \leavevmode and that is for 
a good reason

anyway, adding any mode change command automatically will somehow 
interfere,

\starttext

     \def\MyTitle#1{\blank{\bf#1}\blank}

     \MyTitle{xxx}
     \MyTitle{xxx}
     \MyTitle{xxx}
     \MyTitle{xxx}

     \def\MyTitle#1{\blank{\bf#1}\blank\leavevmode}

     \MyTitle{xxx}
     \MyTitle{xxx}
     \MyTitle{xxx}
     \MyTitle{xxx}

\stoptext

so, when we'd add that you would ask: why is there not implemented that 
unwanted \leavevmode's get cleaned up

Hans

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                                           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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