[Xcb] XStringToKeysym() XCB equivalent?

Ian Osgood iano at quirkster.com
Wed Mar 12 17:56:20 PDT 2008

It is a TODO item to extract that functionality from Xlib and into an  
xcb/util library.  Part of the problem is that it depends on Xrm  
(resource manager) to read /usr/lib/X11/XKeysymDB, and nobody on the  
XCB team wants to touch Xrm with a ten foot pole. This is also why Xt  
hasn't been ported yet.

The other problem is that it depends on some auto-generated source  
files. There is an in-memory static hash-table of standard keysyms,  
generated from xorg/proto/x11proto/keysymdef.h (and maybe some other  
vendor specific keysym headers).  There is a script and a tool in lib/ 
libX11/src/util/ which takes that header and turns it into libX11/src/ 
ks_tables.h, part of which is used by XStringToKeysym().   (The order  
of search is the in-memory hash, then XKeysymDB, then treat the  
string as what appears to be a Unicode identifier.)

XCB should bring keysymdef.h et al into an XML file and do all the  
required header, source, and DB generation from that. And of course  
make *really* good documentation on that file format, since keysyms  
are the one part of Xlib that continues to be heavily modified to the  
present day.


On Mar 12, 2008, at 3:23 PM, Arnaud Fontaine wrote:

> Hi,
> I'm currently  porting Awesome[0] to  XCB. The port is  almost  
> finished,
> but I  wonder how to port XStringToKeysym()  as there seem to  be  
> no XCB
> equivalent to this function. This function is currently used in  
> order to
> get the keysyms corresponding to the keys specified in the  
> configuration
> file. I tried to port it myself but unfortunately I can't figure  
> out how
> to do it, any ideas?
> Regards,
> Arnaud Fontaine
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> Xcb at lists.freedesktop.org
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