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XkbSetServerInternalMods(3)	 XKB FUNCTIONS	   XkbSetServerInternalMods(3)

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

SYNOPSIS

       Bool  XkbSetServerInternalMods  (Display	 *display,  unsigned  int  de-
	      vice_spec,  unsigned  int	affect_real, unsigned int real_values,
	      unsigned int affect_virtual, unsigned int	virtual_values);

ARGUMENTS
       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)

DESCRIPTION
       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  re-
       quest 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.

STRUCTURES
       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  re-
       sults.  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)
       XkbAllComponentsMask   All Fields	 (0x7f)

SEE ALSO
       XkbGetControls(3), XkbGetNames(3), XkbSetControls(3), XkbSetNames(3)

X Version 11			 libX11	1.8.12	   XkbSetServerInternalMods(3)

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