Hallo,
for text positioning in a layer I needed alignment to baseline. I do not
known if I missed something but I did not find it in the current
ConTeXt. So I did that. Baseline is choosen by capital 'B' in the
position parameter. ('B' is adopted from grahicx LaTeX/plain package.)
Also I add \ctop, \ltop, and \rtop in sence of \cbox, \lbox, and rbox,
respectively.
I suggest to add the macros to core-box and supp-box.
Vit Zyka
% baseline alignment
\setvalue{\??ab\??ab B}{\baselinebox}
\setvalue{\??ab\??ab Bl}{\baselineleftbox}
\setvalue{\??ab\??ab Bc}{\baselinecenterbox}
\setvalue{\??ab\??ab Br}{\baselinerightbox}
\setvalue{\??ab\??ab lB}{\leftbaselinebox}
\setvalue{\??ab\??ab cB}{\centerbaselinebox}
\setvalue{\??ab\??ab rB}{\rightbaselinebox}
\def\baselinecenterbox#1%
{\normalhbox
{\setbox0\placedbox{#1}%
\global\boxhdisplacement-.5\wd0
\global\advance\boxhdisplacement-\boxoffset
\global\boxvdisplacement-\boxoffset
\boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box0}}
\def\baselineleftbox#1%
{\normalhbox
{\setbox0\placedbox{#1}%
\global\boxhdisplacement-\wd0
\global\advance\boxhdisplacement-\boxoffset
\global\boxvdisplacement-\boxoffset
\boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box0}}
\def\baselinerightbox#1%
{\normalhbox
{\setbox0\placedbox{#1}%
\global\boxhdisplacement\boxoffset
\global\boxvdisplacement-\boxoffset
\boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box0}}
\let\baselinebox=\baselinecenterbox
\let\leftbaselinebox=\baselineleftbox
\let\rightbaselinebox=\baselinerightbox
%-- \ltop, \rtop, \ctop
\def\lrctop#1#2#%
{\vtop#2\bgroup
\let\\=\endgraf
\forgetall#1\let\next=}
\def\ltop{\lrctop\raggedleft}
\def\rtop{\lrctop\raggedright}
\def\ctop{\lrctop\raggedcenter}
___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context
