Also, the .sc and .scd files are not recognized as text/x-sc, but text/plain or text/x-csrc.

to register the mime-types, one has to run `update-mime-types' or he like. for the record:
http://www.cmake.org/pipermail/cmake/2010-September/039413.html

integrating it with scdoc is a bit tricky:i'm currently trying to implement the logic that xdg-open will open the files in the sc-ide instance with the lowest ID (using QLocalServer). it somehow seems to work, but if we want to open the file in the current ScIDE instance, then we should avoid xdg-open, but do it manually via a new ScDOC-*open method.

Why not just create a mime type for *.schelp files too? Then xdg-open will just work for these as well.

that should be done in any case. however if you have two instances of scide running, there is no guarantee that it will be opened in the one that owns the sclang process which calls xdg-open

lijon, i've implementen an ScIDE-*open method. how can this be integrated into SCDoc?

It's actually not about SCDoc, but the HelpBrowser IIRC. Somewhere these is a call to openOS (or to some method that trickles down to openOS), which could be replaced with ScIDE-open. But I think it calls something like openTextFile or similar which first tries Document.open. So best might be to implement that part of Document, and it might "just work".

thanks. i've adapted String-openDocument to open sc and scd inside the ide.