Hi All, first of all I want to apologize not being responding to several your emails (e.g. this one). My email provider has filtered tens of them as spam... I sighted them just now when I became suspicious of the email delivery. Hans Hagen wrote:

Vit Zyka wrote:

...

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

hm, in that case we probably need a few more -)

See example below, there is already a grid option; also, keep an eye on topskip (we may need s sl sc sr but who can remember that)

Like this? If so, I can prepare the rest alternatives and to test them. \setvalue{\??ab\??ab s}{\topskipcenterbox} \def\topskipcenterbox#1% {\normalhbox {\setbox0\placedbox{#1}% \global\boxhdisplacement-.5\wd0 \global\advance\boxhdisplacement-\boxoffset \global\boxvdisplacement-\boxoffset \global\advance\boxvdisplacement by\topskip \boxcursor\hskip\boxhdisplacement\raise-\boxvdisplacement\box0}}

I dislike the capital B but the g is available (g from gridline)

OK. But is not better to use also \gridrightbox instead of \baselinerightbox, etc. ?

i can add that to the kernel if tested

I tested your code and it is all right.

\unprotect

% \v!grid is taken

\setvalue{\??ab\??ab m}{\middlebox}

\setvalue{\??ab\??ab g}{\baselinemiddlebox} \setvalue{\??ab\??ab gl}{\baselineleftbox} \setvalue{\??ab\??ab gc}{\baselinemiddlebox} \setvalue{\??ab\??ab gr}{\baselinerightbox}

\setvalue{\??ab\??ab \v!regel }{\baselinemiddlebox} % \v!grid is taken \setvalue{\??ab\??ab \v!regel\v!links }{\baselineleftbox} \setvalue{\??ab\??ab \v!regel\v!midden}{\baselinemiddlebox} \setvalue{\??ab\??ab \v!regel\v!rechts}{\baselinerightbox}

\def\baselinemiddlebox#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}}

\protect

\definelayer[text] \setupbackgrounds[text][background=text] \setuplayer[text][width=\textwidth,height=\textheight]

\showgrid

\starttext

\setlayer [text] [location=grid,line=13] {\vtop{\strut \input ward \endstrut}}

\setlayer [text] [corner={right,top}, voffset=\topskip, % \topskipgap, location=gl] {\vtop{\begstrut \input ward \endstrut}}

x

\stoptext

i can add that to the kernel if tested

...

%------------------------------ \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}

ok, i've patched/added:

\def\lbox{\makelrcbox\normalvbox\raggedleft} \def\cbox{\makelrcbox\normalvbox\raggedcenter} \def\rbox{\makelrcbox\normalvbox\raggedright}

\def\ltop{\makelrcbox\normalvtop\raggedleft} \def\ctop{\makelrcbox\normalvtop\raggedcenter} \def\rtop{\makelrcbox\normalvtop\raggedright}

\def\makelrcbox#1#2#3#% {#1#3\bgroup \forgetall \let\\=\endgraf #2\let\next=}

Great, thank you, Hans. Vit Zyka