[NTG-context] new upload

[Hans Hagen]

Hi,

I uploaded a new version. New is that we can apply hz to math, although 
currently we have configured it as experiment.

\setupbodyfont[pagella]

% \startluacode
%     fonts.expansions.vectors.math = {
%         [0x002B] = { 4, 0 }, -- +
%         [0x2212] = { 4, 0 }, -- -
%         [0x003C] = { 8, 0 }, -- <
%         [0x003D] = { 8, 0 }, -- =
%         [0x003E] = { 8, 0 }, -- >
%         [0x002F] = { 2, 0 }, -- /
%         [0x0028] = { 2, 0 }, -- (
%         [0x0029] = { 2, 0 }, -- )
%         [0x005B] = { 2, 0 }, -- [
%         [0x005D] = { 2, 0 }, -- ]
%     }
% \stopluacode

\setupmathematics[hz=yes]

\startbuffer \showglyphs
     \dorecurse{20}{\strut test $x + y/2 - w = 10$ }\unskip
\stopbuffer

\definecolor[tgreen][g=1,t=.5,a=1]
\definecolor[tred]  [r=1,t=.5,a=1]

\startTEXpage[offset=5dk]
     \startoverlay
       {\ruledvbox to 5cm{\setupalign 
[tolerant,stretch]\tgreen\getbuffer\vss}}
       {\ruledvbox to 
5cm{\setupalign[hz,tolerant,stretch]\tred\getbuffer\vss}}
     \stopoverlay
\stopTEXpage

\stoptext

Normally an expansion factor is small and used for both stretch and 
shrink, but we can have them independendent. So, here we stretch rather 
extreme but don't shrink.

\setupmathematics[hz=yes]

only kicks in when we have hz enabled as alignment option. We can of 
course configure more 'stretchable symbols' but first we want to know if 
it makes sense at all. We can also imagine to disable it in specific cases.

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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