Re: math: \text does not scale properly

[Aditya Mahajan <adityam@umich.edu>]

On Thu, 4 Oct 2012, Andreas Mang wrote:

> Hi there,
>
> As Aditya mentioned in a former posting (*) that "\text{ ... }" should 
> scale properly when used as super- or subscript, I have prepared a 
> minimal example to demonstrate that it doesn't. In my document I have 
> switched from "\text{ }" to "\normal", which works.

There is another bug with \text.

{\switchtobodyfont[sans] $\text{sans}$}

does not switch to sans font. Both the incorrect scaling and wrong font 
switch can be corrected by restoring the old definition of \text in 
math-ini.mkiv. Based on the comments in that file, this will come at a 
high penalty on speed. (Slow but correct is better than fast but wrong!)

\unprotect
\def\math_text_choice_indeed#1#2#3% no \everymath !
   {\hbox{\everymath{#1}\switchtobodyfont  [#2]#3}} % 15 sec
  %{\hbox{\everymath{#1}\setcurrentfontbody{#2}#3}} %  3 sec (no math)

\protect

%% Example

\starttext
$f_{\text{text $a+b$}_{\text{text $a+b$}_{\text{text $a+b$}}}}$

{\switchtobodyfont[sans] $f_{\text{text $a+b$}_{\text{text 
$a+b$}_{\text{text $a+b$}}}}$}

$f_{{\normal text}_{{\normal text}_{\normal text}}}$


\stoptext

Aditya
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