Too much space after `\start...`

Question

I have this file:

\newdimen\cslhangindent
\cslhangindent=1.5em
\definestartstop [cslreferences] [
        before={%
        \setupnarrower[left=\cslhangindent]
        \startnarrower[left]%
        \setupindenting[-\leftskip,yes,first]%
        \indentation%
      },
      after=\stopnarrower,
    ]

\starttext

\section{Some title}

\input ward

\section{References}

\startcslreferences

\dorecurse{10}{\dorecurse{10}{This is a Test. }\par}

\stopcslreferences

\stoptext

The skip after the \section{References} is bigger than after \section{Some title}. Why is that? If I delete the empty line after \startcslreferences, the skips are identical.

Is there a way to take care of this through \definestartstop?

Answer 1

The problem is the \indentation statement which immediately forces the indentation box to be placed, but you only want the indentation when the paragraph is started, so instead use \doindentation.

\definemeasure[cslhangindent][1.5em]
\definestartstop
  [cslreferences]
  [before={%
     \setupnarrower[left=\measure{cslhangindent}]
     \startnarrower[left]%
     \setupindenting[-\leftskip,yes,first]%
     \doindentation%
   },
   after=\stopnarrower]

\starttext

\section{Some title}

\input ward

\section{References}

\startcslreferences

\dorecurse{10}{\dorecurse{10}{This is a Test. }\par}

\stopcslreferences

\stoptext