On Nov 9, 2005, at 23:38, J.Pietschmann wrote:
Manuel Mall wrote:
What's the opinion around the group on how external-graphics /
instream-foreign-objects are suppose to be handled with respect to
determining linebreak opportunities.
FOP 0.20.5 implemented b). I read the UAX14 catch all rule LB20 the
way
that it also recommends b).
Also seems to make sense, because both e-g and i-f-o are monolithic
inlines.
Now, I have another question / remark.
Look at InlineCharIterator: the boundary EOT characters for start and
end of the inline, are they passed on to Layout? If so, currently the
following fragment:
...</fo:inline><fo:external-graphic src="..." />
would, according to UAX#14 LB2b, always create a favorable line-
break, even without adding explicit ZWSP.
<fo:block><fo:external-graphic .../> = no break-before (already
starting a line)
</fo:block><fo:external-graphic .../> = idem dito
Now I'm confused: are there any cases where option a) (in combination
with surrounding characters/sibling nodes) is different from option
b)? (That is, apart from adding 'boundary characters' between the
graphic and the surrounding content?)
IOW: Would the element list not always look like the one described in
option b), if we take into account the influence from surrounding
elements and/or PCDATA? (Even in case of option a))
If one focuses solely on the element list for e-g or i-f-o, I'd still
go for a), but I do agree that even if we decide on following that
option, the end-result would look more or less the same as option b)
because an e-g/i-f-o cannot appear completely loose in the source
document. There is always a parent block, neighbouring inline and/or
preceding/following characters, which would generate the penalties
(correct?)
Cheers,
Andreas
