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XkbSetServerInternalMods(3)      XKB FUNCTIONS     XkbSetServerInternalMods(3)

       XkbSetServerInternalMods  - Sets the modifiers that are consumed by the
       server before events are delivered to the client

       Bool   XkbSetServerInternalMods   (Display   *display,   unsigned   int
              device_spec, unsigned int affect_real, unsigned int real_values,
              unsigned int affect_virtual, unsigned int virtual_values);

       - display
              connection to the X server

       - device_spec
              device ID, or XkbUseCoreKbd

       - affect_real
              mask of real modifiers affected by this call

       - real_values
              values for affected real modifiers (1=>set, 0=>unset)

       - affect_virtual
              mask of virtual modifiers affected by this call

       - virtual_values
              values for affected virtual modifiers (1=>set, 0=>unset)

       The core protocol does not provide any means to prevent a modifier from
       being  reported in events sent to clients; Xkb, however makes this pos-
       sible via the InternalMods control. It specifies modifiers that  should
       be  consumed  by  the server and not reported to clients. When a key is
       pressed and a modifier that has its bit set in the InternalMods control
       is  reported to the server, the server uses the modifier when determin-
       ing the actions to apply for the key. The server then clears  the  bit,
       so  it  is  not actually reported to the client. In addition, modifiers
       specified in the InternalMods control are not used to  determine  grabs
       and are not used to calculate core protocol compatibility state.

       Manipulate  the InternalMods control via the internal field in the Xkb-
       ControlsRec structure, using XkbSetControls and XkbGetControls.  Alter-
       natively, use XkbSetServerInternalMods.

       XkbSetServerInternalMods  sends  a  request to the server to change the
       internal modifiers consumed by the server.  affect_real and real_values
       are  masks of real modifier bits indicating which real modifiers are to
       be added and removed from the server's internal modifiers control. Mod-
       ifiers  selected  by  both affect_real and real_values are added to the
       server's internal modifiers control; those selected by affect_real  but
       not  by  real_values  are  removed from the server's internal modifiers
       mask. Valid values for affect_real and real_values consist of any  com-
       bination of the eight core modifier bits: ShiftMask, LockMask, Control-
       Mask, Mod1Mask - Mod5Mask.  affect_virtual and virtual_values are masks
       of  virtual  modifier bits indicating which virtual modifiers are to be
       added and removed from the server's internal modifiers  control.  Modi-
       fiers  selected  by both affect_virtual and virtual_values are added to
       the server's internal modifiers control; those selected by  affect_vir-
       tual  but  not by virtual_values are removed from the server's internal
       modifiers control. See below for a discussion of virtual modifier masks
       to  use  in affect_virtual and virtual_values. XkbSetServerInternalMods
       does not wait for a reply from the  server.  It  returns  True  if  the
       request was sent and False otherwise.

       Virtual  modifiers  are  named  by converting their string name to an X
       Atom and storing the Atom in the names.vmods  array  in  an  XkbDescRec
       structure. The position of a name Atom in the names.vmods array defines
       the bit position used to represent the virtual modifier  and  also  the
       index  used  when accessing virtual modifier information in arrays: the
       name in the i-th (0 relative) entry of names.vmods is the i-th  virtual
       modifier, represented by the mask (1<<i). Throughout Xkb, various func-
       tions have a parameter that is a  mask  representing  virtual  modifier
       choices. In each case, the i-th bit (0 relative) of the mask represents
       the i-th virtual modifier.

       To set the name of a virtual modifier, use XkbSetNames,  using  XkbVir-
       tualModNamesMask in which and the name in the xkb argument; to retrieve
       indicator names, use XkbGetNames.

       The complete description of an Xkb keyboard is given by an  XkbDescRec.
       The component structures in the XkbDescRec represent the major Xkb com-
       ponents outlined in Figure 1.1.

       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 1.

               Table 1 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)
       XkbGetControls(3), XkbGetNames(3), XkbSetControls(3), XkbSetNames(3)
       XkbAllComponentsMask   All Fields         (0x7f)

       SEE ALSO

X Version 11                     libX11 1.6.2      XkbSetServerInternalMods(3)

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