Hello,
I am a new ConTeXt user recently switched from LaTeX (with small amounts
of raw TeX macrosity) which I used for several years.
I was searching the internet, this mailing list and finally the ConTeXt
sources to find some information about achieving hanging indentation in
captions. The 'hang' option for the 'caption' LaTeX package [1] was my
inspiration (you can see an example on the 3 page of the linked manual).
The only thing I could find was an old reply from Taco Hoekwater [2] but
as he mentions this does not work well.
After digging inside the source code of both ConTeXt and caption.sty
I managed to hack the \putcompletecaption macro to do what I need. (see
below)
The changes required are minimal (capture the caption head into a box,
remember its width and later set \hangindent and \hangafter while
typessing the caption body) so maybe this could go into the main ConTeXt
tree? Unfortunately I do not know how to make use of the setup macros so
this currently hardcodes the hanging indentation.
\unprotect
\newdimen\captionhang
\def\putcompletecaption#1#2%
{\doifsomething{\floatcaptionparameter\c!spacebefore}{\blank[\floatcaptionparameter\c!spacebefore]}%
% \floatcaptionparameter\c!before % test for side effects first
\noindent
\xdef\lastcaptiontag{\strut#1}%
\dostartattributes{\??kj\currentfloat}\c!style\c!color\empty
\setbox0\hbox{%
\ifnofloatnumber
\else
\hbox{\doattributes{\??kj\currentfloat}\c!headstyle\c!headcolor{\strut#1}}%
\ifnofloatcaption \else \ifemptyfloatcaption \else
\doifelsenothing{\floatcaptionparameter\c!spaceinbetween}
{\scratchskip\floatcaptionparameter\c!distance\relax
\dotfskip\scratchskip\emergencystretch.5\scratchskip}
{\blank[\floatcaptionparameter\c!spaceinbetween]}%
\fi \fi
\fi
}%
\captionhang=\wd0\unhbox0%
\ifnofloatcaption
\globallet\lastcaptionht\!!zeropoint
\globallet\lastcaptiondp\!!zeropoint
\else
\doattributes{\??kj\currentfloat}\c!textstyle\c!textcolor
{\hangindent=\captionhang\hangafter=1%
\xdef\lastcaptionht{\strutheight}%
\xdef\lastcaptiondp{\strutdepth}%
\begstrut#2\endstrut\endgraf}%
\fi
\dostopattributes
% \floatcaptionparameter\c!after % test for side effects first
\doifsomething{\floatcaptionparameter\c!spaceafter}{\blank[\floatcaptionparameter\c!spaceafter]}}
\protect
[1]: http://www.dd.chalmers.se/latex/Docs/PDF/caption.pdf
[2]: http://thread.gmane.org/gmane.comp.tex.context/21675/focus=21676
--
regards,
Jakub Piotr Cłapa
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