[dev-context] setupbodyfont

[Wolfgang Schuster]

Am 09.06.2009 um 09:13 schrieb Wolfgang Schuster:

> Hi Hans,
>
> I run with my simplefonts module in two problems when I try to set  
> the bodyfont,
> the regard math and fallback fonts and I was only to solve them by  
> redefining
> of a few values.
>
>
> 1. I have to set the bodyfont at the same time when I set a  
> individual font for
>  serif, sans or mono. This works fine for the the three text style  
> but not when
>  I try to switch to a different math font, which is frozen with the  
> first
>  \setupbodyfont command and can only be changed when I the main  
> fontclass
>  (created with \registerfontclass in \definetypeface) and the style  
> value
>  for rm (I need the 'rm' style to allow e.g. ss as document style).

Small correction, I have to undefine the currently used style, i.e. in  
my
example below I have to reset the sans serif style, not the serif one.

>  Here is a example to illustrate the problem:
>
> \definetypeface[mainface][rm][serif][times][default]
>
> \setupbodyfont[mainface,ss,12pt]
>
> \definetypeface[mainface][ss][sans][helvetica][default]
> \definetypeface[mainface][tt][mono][courier][default]
>
> \definetypeface[mainface][mm][math][palatino][default]
>
> % comment/uncomment the following two lines to see how
> % the math font changes with/without these redefinitions
>
> \letvalueempty{@@tfmainfacedefault}%
> \undefinevalue{@f at st@rm}%

\undefinevalue{@f at st@ss}%

> \setupbodyfont[mainface,ss,12pt]
>
> %\definetypeface[mainface][mm][math][cambria][default]
>
> %\letvalueempty{@@tfmainfacedefault}%
> %\undefinevalue{@f at st@rm}%
> %\setupbodyfont[mainface,ss,12pt]
>
> \starttext
>
> text
>
> \rmtf regular \it italic \bf bold \bi bolditalic
>
> \sstf regular \it italic \bf bold \bi bolditalic
>
> \tttf regular \it italic \bf bold \bi bolditalic
>
> $$ c^2 = a^2 + b^2 $$
>
> \stoptext
>
>
> 2. The fallback for the main style (i.e. \rmtf) is frozen too with
>  the first \setupbodyfont line in the document with can be only reset
>  when I undefine \newfontidentifier, a example for this is:
>
> \starttypescript [serif] [mainfont]
>   \setups[font:fallback:serif]
>   \definefontsynonym [Serif] [name:texgyrepagellaregular]  
> [fallbacks=mainfont,features=default]
> \stoptypescript
>
> \definetypeface [mainfont] [rm] [serif] [mainfont] [default]
>
> \setupbodyfont[mainfont,rm]
>
> \definefontfallback [mainfont] [name:texgyretermesregular]  
> [0x0065-0x0070] [force=yes]
>
> % The following line is necessary to enable the fallback font for  
> the main
> % style after the bodyfont is set, if this isn't done the complete  
> text
> % below is typeset in Pagella whereas e-p should be in Times
>
> \undefinevalue\newfontidentifier
> \setupbodyfont[mainfont,rm]
>
> \starttext
>
> abcdefghijkmnopqrstuvwxyz
>
> \stoptext
>
>
> I would prefer something documented (e.g.  
> \setupbodyfont[reload,...]) which can
> be used to get the same effect as I did with my hacks because I like  
> now my new
> font module, it's lot easier than direct method to set fallback fonts.
>
> TIA
> Wolfgang