Taco Hoekwater wrote:
>
> Aditya Mahajan wrote:
>> Ah, so that is why it is lowlevel. I wonder why the following does not
>> work.
>>
>> \setupbodyfontenvironment [default]
>> [em={\italic\color[red]}]
>
> The em key is a bit extra extra special: it has to be either
> 'italic' or 'slanted', everything else is ignored. This is because
> of the need to allow bold emphasis. (\bf\em == \bs or \bi).
>
> I would personally be happier if it would just use whatever was
> in the argument when it is *not* italic or slanted, instead of
> ignoring the argument, but that's how it is.
\def\doemphasistypeface#1#2%
{\doifelsevalue{\??ft\fontclass\normalizedbodyfontsize\c!em}\v!slanted
{#1}%
{\doifelsevalue{\??ft\fontclass\normalizedbodyfontsize\c!em}\v!italic
{#2}%
{\doifelsevaluenothing{\??ft\fontclass\normalizedbodyfontsize\c!em}
{\doifelsevalue{\??ft\normalizedbodyfontsize\c!em}\v!slanted
{#1}%
{\doifelsevalue{\??ft\normalizedbodyfontsize\c!em}\v!italic
{#2}%
{\getvalue{\??ft\normalizedbodyfontsize\c!em}}}}
{\getvalue{\??ft\fontclass\normalizedbodyfontsize\c!em}}}}}
however, this does not provide italic correction, so better is:
\newtoks\everyemphasized
\unexpanded\def\em
{\relax
\ifdim\slantperpoint>\zeropoint
\settrue\emneeded
\else
\setfalse\emneeded
\fi
\setemphasisboldface % new
\ifx\fontalternative\c!it % \ifnum\fam=\itfam
\def\emphasistypeface{\it}\tf
\else\ifx\fontalternative\c!sl % \ifnum\fam=\slfam
\def\emphasistypeface{\sl}\tf
\else\ifx\fontalternative\c!bf % \ifnum\fam=\bffam
\emphasisboldface
\else\ifx\fontalternative\c!bs % \ifnum\fam=\bsfam
\def\emphasisboldface{\bs}\bf
\else\ifx\fontalternative\c!bi % \ifnum\fam=\bifam
\def\emphasisboldface{\bi}\bf
\else
\emphasistypeface
\fi\fi\fi\fi\fi
\the\everyemphasized
\ifconditional\emneeded\relax
\else
\expandafter\aftergroup
\fi
\emphasiscorrection}
which provides a hook, as in:
\appendtoks
\red
\to \everyemphasized
both mechanisms will be provided (maybe something emcolor later, when i
can get myself motivated for such an possibly never documented feature)
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