On Sun, 2008-08-31 at 17:36 -0400, Ryan Lortie wrote:
> On Sun, 2008-08-31 at 22:22 +0200, Andreas Delmelle wrote:
> > Not sure what the cause of the issue is (yet), but as for a final
> > try, the following seems to produce desirable results:
> >
> > <fo:block font-family="serif, Symbol">
> > (<fo:character character="↑"/>1) (+2) (<fo:character
> > character="∀"/>3) (text)
> > </fo:block>
One additional thing that I've noticed since I wrote my reply:
The <character> tag actually has no effect on the character that it
prints -- instead it affects the layout of the rest of the line, causing
the 'serif' parts of the line to be aligned properly with character in
the tag.
If you put a letter inside <character> then the 'serif' parts of the
line end up lined up like normal. If you put a symbol then they end up
lined up properly with that symbol.
Look at this:
<block font-family='serif,Symbol' text-align='center'>
(∀1) (+2) (<character character='↑'/>3) (+4) (∀5) (ouch)
</block>
In this case everything looks great -- and it appears that the (+2) and
(+4) that have moved down -- not the ∀ or the ↑ up.
I also did some tests with several lines of text. Only the physical
line containing the <character> tag renders properly -- the others have
the same issue.
When looking at the several lines of text, however, something
immediately jumps out at you -- any line containing a <character>
rendered with Symbol is taller than all the other lines. I guess this
is what "makes room" for the 'Symbol' characters to be rendered properly
inline with the 'serif' characters.
So my new wild guess about the nature of this problem is something like:
'Symbol' is a taller font than 'serif'.
FOP decides how tall each line should be and then places characters
within that line. In the event that a character is "too tall" to fit
then it ends up being aligned to the top (and hanging out the bottom).
This is what happens when you have UTF8 character inline.
When you use <character> you somehow get FOP to notice that you're
placing taller characters in the line and it takes this into account
when deciding the proper height of the line.
When you don't use <character> then FOP makes its decision about the
height of the line based solely on the first listed font family
(ignoring all of the others, irrespective of if they are used for font
substitution in that line).
Not knowing Java and being completely unfamiliar with the FOP codebase I
have no way to verify that this is the actual nature of the problem or
to know how I'd go about fixing it. Can anyone help? :)
Thanks for tuning into the saga thus far...
Cheers
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