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On Mon, 2011-08-15 at 17:16 +0200, Lubos Lunak wrote:
Hello,

 I'm implementing .docx OOXML support for writing math formulas. As this is 
something that could be used not only by Writer but also by other components, 
I want to implement the writing of the formula in Starmath. And even if I 
didn't want, Sm* classes (which implement and store the formulas) are in 
starmath/ , and sw-starmath do not link against each other.

 So, the question is, how do I call from sw to starmath without linking them 
together? I checked how the binary .doc filter does it, and it goes via ~10 
calls deep [1] that call some UNO interfaces and

store the result in some private stream or whatever.

SvxMSExportOLEObjects::ExportOLEObject seems to have blown out of
control but the first and last branches are the typical ones. If it's a
generic object then copy it's storage under the destination storage
unchanged. If it's one of the special things that have an analogue in
the destination format save it to a temporary storage in another format
and copy that into the destination format instead.

//export to temporary stream "pStream"
::uno::Reference < io::XOutputStream > xOut =
new ::utl::OOutputStreamWrapper( *pStream );
aSeq[0].Value <<= xOut;
xStor->storeToURL( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "private:stream" )), aSeq ); 

//copy result to destination ole2 storage
SotStorageRef xOLEStor = new SotStorage( pStream, sal_True );
xOLEStor->CopyTo( &rDestStg );

I already have a pointer to SmModel and SmDocShell (I can get it the same way 
the .doc code does) and just need to call their method, passing the XML 
serializer object as an argument, that's it.

Probably matters what the destination format is like ? Is it a
standalone thing and/or exists in a substorage/folder of the parent
format where it doesn't care about what it is inside ? i.e. I'd sort of
expect to basically just add another export filter to starmath for
whatever that format is, add it to SmDocShell::ConvertTo and call that
directly/indirectly. And have a save as... entry for the format if it
makes sense to have it standalone ?

That's not going to work if the destination format needs hooks back into
its surrounding container. Is that the problem ?

C.


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