Finding out if an element is processed as part of an xref text

[Stefan Knorr <sknorr@suse.de>]

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Hi again,

so... we are trying to create nice-looking PDF documents with nice
fonts that are displayed with matching x-heights (i. e. when mixing
different fonts on the same line, the height of the lowercase letters
should always be the same). We need a solution that works with FOP
(and XEP) which has led to me manually having to find out factors to
multiply font sizes with... and now it works, mostly.

We are using the usual three different fonts:
+ "Serif" for running text
+ "Sans" for titles and ToC
+ "Mono" for code examples, command, etc.

When adding another font within the running text, as needs to be done
for e.g. commands in a para, I am using em units. FO output could e.g. be:
    <fo:block font-size="12pt">
      This was a DocBook para with a
      <fo:inline font-size="0.89em">command</fo:inline>
      in it.
    </fo:block>

Since titles are usually in the sans-serif font, but running text is in
the serif font, I need different em sizes for each to make the mono font
appear well-adjusted in either.

However, there is an issue with xrefs: they are generally displayed in a
serif font, but usually reference a title. Sometimes that title contains
a monospaced elements like a command. But when I process that monospaced
element, I can't see that I am processing it for a xref.

I tried using no.anchors.mode to determine whether I was within an xref
but that seems to be set for every title now, somehow (not sure if my
code was always faulty or this is something that has changed with a
DocBook update).

Any ideas on how resolve this?


Thanks in advance,

Stefan.


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