XkbChangeNames man page on Hurd

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XkbChangeNames(3)		 XKB FUNCTIONS		     XkbChangeNames(3)

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 modifica‐
       tions to the symbolic names and effectively reduces the amount of traf‐
       fic 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 Ta‐
       ble  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	struc‐
       tures  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)

X Version 11			 libX11 1.6.2		     XkbChangeNames(3)
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