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       XkbSetMap - Send a complete new set of values for entire components to the server.


       Bool XkbSetMap (Display *dpy, unsigned int which, XkbDescPtr xkb);


       - dpy  connection to X server

       - which
              mask selecting subcomponents to update

       - xkb  description from which new values are taken


       There  are  two  ways to make changes to map components: either change a local copy of the
       keyboard map and call XkbSetMap to send the modified map to  the  server,  or,  to  reduce
       network traffic, use an XkbMapChangesRec structure and call XkbChangeMap.

       Use XkbSetMap to send a complete new set of values for entire components (for example, all
       symbols, all actions, and so  on)  to  the  server.  The  which  parameter  specifies  the
       components  to be sent to the server, and is a bitwise inclusive OR of the masks listed in
       Table 1. The xkb parameter is a pointer  to  an  XkbDescRec  structure  and  contains  the
       information  to  be  copied  to  the  server.   For  each  bit set in the which parameter,
       XkbSetMap takes the corresponding structure values from the xkb parameter and sends it  to
       the server specified by dpy.

       If  any  components  specified  by  which  are not present in the xkb parameter, XkbSetMap
       returns False. Otherwise, it sends the update request to  the  server  and  returns  True.
       XkbSetMap can generate BadAlloc, BadLength, and BadValue protocol errors.

       Key  types,  symbol maps, and actions are all interrelated; changes in one require changes
       in the others. Xkb provides functions to make it  easier  to  edit  these  components  and
       handle  the interdependencies. Table 1 lists these helper functions and provides a pointer
       to where they are defined.

                                  Table 1 Xkb Mapping Component Masks
                                       and Convenience Functions
       Mask                        Value    Map      Fields        Convenience
       XkbKeyTypesMask             (1<<0)   client   types         XkbGetKeyTypes
                                                     size_types    XkbResizeKeyType
                                                     num_types     XkbCopyKeyType
       XkbKeySymsMask              (1<<1)   client   syms          XkbGetKeySyms
                                                     size_syms     XkbResizeKeySyms
                                                     num_syms      XkbChangeTypesOfKey
       XkbModifierMapMask          (1<<2)   client   modmap        XkbGetKeyModifierMap
       XkbExplicitComponentsMask   (1<<3)   server   explicit      XkbGetKeyExplicitComponents
       XkbKeyActionsMask           (1<<4)   server   key_acts      XkbGetKeyActions
                                                     acts          XkbResizeKeyActions
       XkbKeyBehaviorsMask         (1<<5)   server   behaviors     XkbGetKeyBehaviors
       XkbVirtualModsMask          (1<<6)   server   vmods         XkbGetVirtualMods
       XkbVirtualModMapMask        (1<<7)   server   vmodmap       XkbGetVirtualModMap

       The changed field identifies the  map  components  that  have  changed  in  an  XkbDescRec
       structure  and  may  contain  any of the bits in Table 1, which are also shown in Table 2.
       Every 1 bit in  changed  also  identifies  which  other  fields  in  the  XkbMapChangesRec
       structure contain valid values, as indicated in Table 2. The min_key_code and max_key_code
       fields are for reference only; they are ignored on any requests sent to the server and are
       always updated by the server whenever it returns the data for an XkbMapChangesRec.

                                            Table 2 XkbMapChangesRec Masks

       Mask                                       XkbMapChangesRec       XkbDescRec Field Containing
                                                  Fields                 Changed Data
       XkbKeyTypesMask                            first_type,            map->type[first_type] ..

                                                  num_types              map->type[first_type + num_types - 1]

       XkbKeySymsMask                             first_key_sym,         map->key_sym_map[first_key_sym] ..
                                                  num_key_syms           map->key_sym_map[first_key_sym +

                                                                         num_key_syms - 1]
       XkbModifierMapMask                         first_modmap_key,      map->modmap[first_modmap_key] ..
                                                  num_modmap_keys        map->modmap[first_modmap_key +

       XkbExplicitComponentsMask                  first_key_explicit,
       server->explicit[first_key_explicit] ..
                                                  num_key_explicit       server->explicit[first_key_explicit +
                                                                         num_key_explicit - 1]

       XkbKeyActionsMask                          first_key_act,         server->key_acts[first_key_act] ..
                                                  num_key_acts           server->key_acts[first_key_act +
                                                                         num_key_acts - 1]
       XkbKeyBehaviorsMask                        first_key_behavior,

       server->behaviors[first_key_behavior] ..
                                                  num_key_behaviors      server->behaviors[first_key_behavior +
                                                                         num_key_behaviors - 1]
       XkbVirtualModsMask                         vmods                  server->vmods[*]

       XkbVirtualModMapMask                       first_vmodmap_key,
                                                  num_vmodmap_keys        ..

                                                                         + num_vmodmap_keys - 1]


       True           The  XkbSetMap  function returns True all components specified by which are
                      present in the xkb parameter.

       False          The XkbSetMap function returns False if any component specified by which is
                      not present in the xkb parameter.


       Use  the  XkbMapChangesRec  structure  to  identify and track partial modifications to the
       mapping components and to reduce the amount of traffic between the server and clients.

       typedef struct _XkbMapChanges {
           unsigned short   changed;            /∗ identifies valid components in structure */
           KeyCode          min_key_code;       /∗ lowest numbered keycode for device */
           KeyCode          max_key_code;       /∗ highest numbered keycode for device */
           unsigned char    first_type;         /∗ index of first key type modified */
           unsigned char    num_types;          /∗ # types modified */
           KeyCode          first_key_sym;      /∗ first key whose key_sym_map changed */
           unsigned char    num_key_syms;       /∗ # key_sym_map entries changed */
           KeyCode          first_key_act;      /∗ first key whose key_acts entry changed */
           unsigned char    num_key_acts;       /∗ # key_acts entries changed */
           KeyCode          first_key_behavior; /∗ first key whose behaviors changed */
           unsigned char    num_key_behaviors;  /∗ # behaviors entries changed */
           KeyCode          first_key_explicit; /∗ first key whose explicit entry changed */
           unsigned char    num_key_explicit;   /∗ # explicit entries changed */
           KeyCode          first_modmap_key;   /∗ first key whose modmap entry changed */
           unsigned char    num_modmap_keys;    /∗ # modmap entries changed */
           KeyCode          first_vmodmap_key;  /∗ first key whose vmodmap changed */
           unsigned char    num_vmodmap_keys;   /∗ # vmodmap entries changed */
           unsigned char    pad1;               /∗ reserved */
           unsigned short   vmods;              /∗ mask indicating which vmods changed */
       } XkbMapChangesRec,*XkbMapChangesPtr;

       The complete description of an Xkb keyboard is  given  by  an  XkbDescRec.  The  component
       structures in the XkbDescRec represent the major Xkb components.

       typedef struct {
          struct _XDisplay * display;      /∗ connection to X server */
          unsigned short     flags;        /∗ private to Xkb, do not modify */
          unsigned short     device_spec;  /∗ device of interest */
          KeyCode            min_key_code; /∗ minimum keycode for device */
          KeyCode            max_key_code; /∗ maximum keycode for device */
          XkbControlsPtr     ctrls;        /∗ controls */
          XkbServerMapPtr    server;       /∗ server keymap */
          XkbClientMapPtr    map;          /∗ client keymap */
          XkbIndicatorPtr    indicators;   /∗ indicator map */
          XkbNamesPtr        names;        /∗ names for all components */
          XkbCompatMapPtr    compat;       /∗ compatibility map */
          XkbGeometryPtr     geom;         /∗ physical geometry of keyboard */
       } XkbDescRec, *XkbDescPtr;

       The  display  field  points  to  an X display structure. The flags field is private to the
       library: modifying flags may yield unpredictable results. The device_spec field  specifies
       the device identifier of the keyboard input device, or XkbUseCoreKeyboard, which specifies
       the core keyboard device. The min_key_code and max_key_code fields specify the  least  and
       greatest keycode that can be returned by the keyboard.

       Each  structure  component  has a corresponding mask bit that is used in function calls to
       indicate that the structure should be manipulated in some manner, such as allocating it or
       freeing  it. These masks and their relationships to the fields in the XkbDescRec are shown
       in Table 3.

               Table 3 Mask Bits for XkbDescRec

       Mask Bit               XkbDescRec Field   Value

       XkbControlsMask        ctrls              (1L<<0)
       XkbServerMapMask       server             (1L<<1)

       XkbIClientMapMask      map                (1L<<2)
       XkbIndicatorMapMask    indicators         (1L<<3)

       XkbNamesMask           names              (1L<<4)
       XkbCompatMapMask       compat             (1L<<5)

       XkbGeometryMask        geom               (1L<<6)
       XkbAllComponentsMask   All Fields         (0x7f)


       BadAlloc       Unable to allocate storage

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

       BadValue       An argument is out of range


       XkbChangeMap(3),     XkbChangeTypesOfKey(3),     XkbCopyKeyType(3),    XkbCopyKeyTypes(3),
       XkbGetKeyActions(3),        XkbGetKeyBehaviors(3),         XkbGetKeyExplicitComponents(3),
       XkbGetKeyModifierMap(3),   XkbGetKeySyms(3),   XkbGetKeyTypes(3),  XkbResizeKeyActions(3),
       XkbResizeKeySyms(3), XkbResizeKeyType(3), XkbGetVirtualModMap(3), XkbGetVirtualMods(3)