🚀 go-pugleaf

In article <SCOTT.92Jul30040409@nic.gac.edu>,
	scott@nic.gac.edu (Scott Hess) writes:
>I've been attempting to get some stuff done using custom RTF
>directives in Text, specifically an \attachment directive (like
>what Mail uses for attachments).  I've got a special Cell type that
>can hold a filename, and will image the file's icon and everything
>- just as we expect.  I've registered the Cell subclass' class
>using Text's +registerDirective:forClass:.

And, the saga continues ...

First off, it appears that the \attachment directive is somehow
special cased.  I can't say exactly how, or why, because nobody
has replied to my posting (well, nobody has replied with any answers
or even hints).  But, if I name my directive \attach, or anything
but \attachment, things work out fine.  Perhaps \attachment is a
Microsoft pre-defined directive.



In any case, I managed to figure out a way that I can cause my
program to output the \attachment directive _exactly_ like Mail
does, though.  It gets a bit hairy, here.  When I put the Cell that
displays the file's icon into the Text object, I cause the NXRun
associated with that Cell to have the rFlags.subclassWantsRTF flag
set to YES.  This, in turn, causes my Text delegate to be called
with -textWillWriteRichText:*.  At the point where -textWillWriteRichText:*
is called, the Text has already written "\attachment ", so I then
call the NXRun's info element (which is the Cell to be written)
and ask it to write what it needs to write, namely the pathname.

Now, my problem is retrieving the data from a stream.  The delegate
method -textWillReadRichText:* is called when Text comes across an
\attachment directive in the input.  It is simple enough for me to
then read the pathname from the stream, _but_, there's no apparent
method by which I can create a Cell and place it in the Text!  If
I use Text's -replaceSelWithCell:, it places the Cell wherever the
selection was before the Paste was initiated without regard to which
point in the stream we are reading from.  This means that all of
the Cells are pasted first, followed by any text.

Now, this I can probably fix using an _extremely_ hacked solution
- I can record the positions and filename for each Cell, and then
insert them after the Paste.  But this is _ugly_.  Is there any
way I can say "Put this Cell at the point we are in our reading of
the NXStream?".



[BTW, I just implemented the above.  My, oh my, it _is_ disgusting.
Works, though.  One problem - why don't my Text delegate methods
-textWillStartReadingRichText: and -textWillFinishReadingRichText:
get called before and after RTF is read?  I ended up putting the
functionality in a Text subclass, but I'd still be interested in
knowing ...]

Thanks,
--
scott hess <shess@ssesco.com>  <Who's now in a programming Berserker-frenzy>
12901 Upton Avenue South, #326  Burnsville, MN 55337 (612) 895-1208 Anytime!
<I want to become so famous that people buy tapes of me reading source code>