[B2-devel] B2/SS clipboard implementation for Unix

[Gwenole B. <gb...@di...>]

Hi,

I have spent the day learning about X11 clipboard facilities (the ICCCM 
compliant way) to handle copy/paste between MacOS and X11. However, a 
few things worry me.

1) According to Inside Mac docs, GetScrap & PutScrap are expected to 
return values. However, I am confused with actual semantics of the ROM 
traps we patch. i.e. are they also expected to return values in the 
stack?

2) It seems that GetScrap gets called *several* times when you select 
an entry to edit, without any 'paste' action. e.g. a folder label. This 
brings up the problems of getting the native clipboard several times 
too. That may be costly to handle, especially with images. One solution 
may be to call XConvertSelection() with a timestamp of the last 
successful request for GetScrap, but I am still not convinced.

3) Currently, I am trying to be ICCCM compliant. This means for 
instance that copying text from MacOS won't put it in the PRIMARY 
selection for immediate pasting with the middle mouse button. We could 
change that but the default must comply with ICCCM recommendations so 
that we remain consistent with other programs e.g. KDE applications. I 
plan an extra prefs item for that: "clipprimary" or whatever name 
people feel better. However, I won't implement that now as I would like 
to first play with 'PICT' handling.

Any thoughts?

Thanks,
Gwenole.