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XkbResizeKeySyms(3)


NAME

   XkbResizeKeySyms - Change the number of symbols bound to a key

SYNOPSIS

   KeySym * XkbResizeKeySyms (XkbDescRec *xkb, int key, int needed);

ARGUMENTS

   - xkb  keyboard description to be changed

   - key  keycode for key to modify

   - needed
          new number of keysyms required for key

DESCRIPTION

   XkbResizeKeySyms  reserves  the  space  needed  for  needed keysyms and
   returns a pointer to the beginning of the  new  array  that  holds  the
   keysyms.  It  adjusts the offset field of the key_sym_map entry for the
   key if necessary and can also change the syms, num_syms, and  size_syms
   fields  of  xkb->map  if  it is necessary to reallocate the syms array.
   XkbResizeKeySyms does not modify either the width or number  of  groups
   associated with the key.

   If  needed  is  greater than the current number of keysyms for the key,
   XkbResizeKeySyms initializes all new keysyms in the array to NoSymbol.

   Because the number of symbols needed by a key is normally  computed  as
   width  *  number of groups, and XkbResizeKeySyms does not modify either
   the width or number of groups for the key, a  discrepancy  exists  upon
   return  from  XkbResizeKeySyms  between  the  space  allocated  for the
   keysyms and the number required. The unused  entries  in  the  list  of
   symbols  returned  by  XkbResizeKeySyms are not preserved across future
   calls to any of the map editing functions, so you must update  the  key
   symbol  mapping  (which  updates the width and number of groups for the
   key)  before  calling   another   allocator   function.   A   call   to
   XkbChangeTypesOfKey will update the mapping.

   If  any  allocation  errors  occur while resizing the number of symbols
   bound to the key, XkbResizeKeySyms returns NULL.

SEE ALSO

   XkbChangeTypesOfKey(3), XkbResizeKeyActions(3)

NOTES

   A change to the number of symbols bound to a key should be  accompanied
   by  a  change  in  the  number  of  actions  bound  to  a key. Refer to
   XkbResizeKeyActions for more information  on  changing  the  number  of
   actions bound to a key.



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