Re: xterm

[Erdmut Pfeifer <e.pfeifer@science-computing.de>]

On Mon, Jan 29, 2001 at 02:38:11PM +0100, Ionel Mugurel Ciob?c? wrote:
> Hi all,
> 
> Someone knows where I can get the default behaviour of characters
> from 128 to 255, if they are separators or not.
> 
> In man xterm it sais about class CharClass, but it refer only to
> 0-127:
> 
>        The default table is
> 
>                static int charClass[128] = {
>                /* NUL  SOH  STX  ETX  EOT  ENQ  ACK  BEL */
>                    32,   1,   1,   1,   1,   1,   1,   1,
>         .
>         .
>         .
>                /*   x    y    z    {    |    }    ~  DEL */
>                    48,  48,  48, 123, 124, 125, 126,   1};
> 
> 
> Info xterm give the same answer as man xterm.

this seems to be a highly version-specific issue. The newer versions
of xterm seem to support the full 8-bit charset and even unicode
in CharClass definitions.

To quote from the manpage that comes with the most recent source
distribution of xterm (e.g. http://dickey.his.com/xterm/xterm.tar.gz):

(...)
CHARACTER CLASSES                                                                               
       Clicking the middle mouse button twice in rapid succession                               
       will cause all characters of the same class (e.g. letters,                               
       white space, punctuation) to be selected.  Since different                               
       people have  different  preferences  for  what  should  be                               
       selected  (for  example, should filenames be selected as a                               
       whole or only the separate subnames), the default  mapping                               
       can  be overridden through the use of the charClass (class                               
       CharClass) resource.                                                                     
                                                                                                
       This  resource  is  a   series   of   comma-separated   of                               
       range:value pairs.  The range is either a single number or                               
       low-high in the range of 0 to 65535, corresponding to  the                               
       code for the character or characters to be set.  The value                               
       is arbitrary, although the default table uses the  charac-                               
       ter  number  of  the first character occurring in the set.                               
       When not in UTF-8 mode, only the first 256 bytes  of  this                               
       table will be used.                                                                      
                                                                                                
       The default table starts as follows -                                                    
                                                                                                
               static int charClass[256] = {                                                    
(...)


I can't tell you the exact version in which support for this was added.
If you are interested in all the details, you might want to browse the
changelog at

http://dickey.his.com/xterm/xterm.log.html

(though that's probably more than you want to know :)

Also, if you are not afraid of reading the source, have a look at
the file "charclass.c" from the source distribution...

HTH,
Erdmut


-- 
Erdmut Pfeifer
science+computing gmbh

-- Bugs come in through open windows. Keep Windows shut! --