NAME

       XkbChangeNames - _summary-line_

SYNOPSIS

       Bool XkbChangeNames (Display *dpy, unsigned int which, XkbDescPtr Xkb);

ARGUMENTS

       - dpy  connection to the X server

       - which
              mask of names or map components to be updated

       - Xkb  keyboard description to be updated

DESCRIPTION

       XkbChangeNames   provides  a  more  flexible  method  for  changing  symbolic  names  than
       XkbSetNames and requires the use of an XkbNameChangesRec structure.

       XkbChangeNames copies any names specified by changes from the keyboard  description,  xkb,
       to  the  X server specified by dpy. XkbChangeNames aborts and returns False if any illegal
       type names or type shift level names are specified by changes.

       To change the symbolic names in the server, first modify a  local  copy  of  the  keyboard
       description  and  then  use  either  XkbSetNames,  or,  to  save  network  traffic,  use a
       XkbNameChangesRec structure and call XkbChangeNames to download the changes to the server.
       XkbSetNames  and  XkbChangeNames  can generate BadAlloc, BadAtom, BadLength, BadMatch, and
       BadImplementation errors.

STRUCTURES

       The XkbNameChangesRec allows applications to identify small modifications to the  symbolic
       names and effectively reduces the amount of traffic sent to the server:

           typedef struct _XkbNameChanges {
               unsigned int   changed;            /∗ name components that have changed
       */
               unsigned char  first_type;         /∗ first key type with a new name */
               unsigned char  num_types;          /∗ number of types with new names */
               unsigned char  first_lvl;          /∗ first key type with new level
       names */
               unsigned char  num_lvls;           /∗ number of key types with new level
       names */
               unsigned char  num_aliases;        /∗ if key aliases changed, total
       number of key aliases */
               unsigned char  num_rg;             /∗ if radio groups changed, total
       number of radio groups */
               unsigned char  first_key;          /∗ first key with a new name */
               unsigned char  num_keys;           /∗ number of keys with new names */
               unsigned short changed_vmods;      /∗ mask of virtual modifiers for
       which names have changed */
               unsigned long  changed_indicators; /∗ mask of indicators for which names
       were changed */
               unsigned char  changed_groups;     /∗ mask of groups for which names
       were changed */
           } XkbNameChangesRec, *XkbNameChangesPtr

       The  changed  field  specifies  the  name  components that have changed and is the bitwise
       inclusive OR of the valid names mask bits defined in Table 1. The rest of  the  fields  in
       the  structure  specify  the  ranges  that  have changed for the various kinds of symbolic
       names, as shown in Table 2.

       Xkb provides several functions that work with symbolic names. Each of these functions uses
       a  mask  to  specify  individual fields of the structures described above. These masks and
       their relationships to the fields in a keyboard description are shown in Table 1.

                                 Table 1 Symbolic Names Masks
       ─────────────────────────────────────────────────────────────────────────────────
       Mask Bit                 Value      Keyboard     Field
                                           Component
       ─────────────────────────────────────────────────────────────────────────────────
       XkbKeycodesNameMask      (1<<0)     Xkb->names   keycodes
       XkbGeometryNameMask      (1<<1)     Xkb->names   geometry
       XkbSymbolsNameMask       (1<<2)     Xkb->names   symbols
       XkbPhysSymbolsNameMask   (1<<3)     Xkb->names   phys_symbols
       XkbTypesNameMask         (1<<4)     Xkb->names   type
       XkbCompatNameMask        (1<<5)     Xkb->names   compat
       XkbKeyTypeNamesMask      (1<<6)     Xkb->map     type[*].name
       XkbKTLevelNamesMask      (1<<7)     Xkb->map     type[*].lvl_names[*]
       XkbIndicatorNamesMask    (1<<8)     Xkb->names   indicators[*]
       XkbKeyNamesMask          (1<<9)     Xkb->names   keys[*], num_keys
       XkbKeyAliasesMask        (1<<10)    Xkb->names   key_aliases[*], num_key_aliases
       XkbVirtualModNamesMask   (1<<11)    Xkb->names   vmods[*]
       XkbGroupNamesMask        (1<<12)    Xkb->names   groups[*]
       XkbRGNamesMask           (1<<13)    Xkb->names   radio_groups[*], num_rg
       XkbComponentNamesMask    (0x3f)     Xkb->names   keycodes,
                                                        geometry,
                                                        symbols,
                                                        physical symbols,
                                                        types, and
                                                        compatibility map
       XkbAllNamesMask          (0x3fff)   Xkb->names   all name components

                                Table 2 XkbNameChanges Fields
       ────────────────────────────────────────────────────────────────────────────────
       Mask                     Fields               Component    Field
       ────────────────────────────────────────────────────────────────────────────────
       XkbKeyTypeNamesMask      first_type,          Xkb->map     type[*].name
                                num_types
       XkbKTLevelNamesMask      first_lvl,           Xkb->map     type[*].lvl_names[*]
                                num_lvls
       XkbKeyAliasesMask        num_aliases          Xkb->names   key_aliases[*]
       XkbRGNamesMask           num_rg               Xkb->names   radio_groups[*]
       XkbKeyNamesMask          first_key,           Xkb->names   keys[*]
                                num_keys
       XkbVirtualModNamesMask   changed_vmods        Xkb->names   vmods[*]
       XkbIndicatorNamesMask    changed_indicators   Xkb->names   indicators[*]
       XkbGroupNamesMask        changed_groups       Xkb->names   groups[*]

DIAGNOSTICS

       BadAlloc       Unable to allocate storage

       BadAtom        A name is neither a valid Atom or None

       BadImplementation
                      Invalid reply from server

       BadLength      The length of a  request  is  shorter  or  longer  than  that  required  to
                      minimally contain the arguments

       BadMatch       A  compatible version of Xkb was not available in the server or an argument
                      has correct type and range, but is otherwise invalid

SEE ALSO

       XkbSetNames(3)