1XkbChangeNames(3)                XKB FUNCTIONS               XkbChangeNames(3)
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NAME

6       XkbChangeNames - _summary-line_
7

SYNOPSIS

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

12       - dpy  connection to the X server
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14       - which
15              mask of names or map components to be updated
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17       - Xkb  keyboard description to be updated
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DESCRIPTION

20       XkbChangeNames  provides  a  more flexible method for changing symbolic
21       names than XkbSetNames and requires the  use  of  an  XkbNameChangesRec
22       structure.
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24       XkbChangeNames  copies any names specified by changes from the keyboard
25       description, xkb, to the X  server  specified  by  dpy.  XkbChangeNames
26       aborts  and returns False if any illegal type names or type shift level
27       names are specified by changes.
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29       To change the symbolic names in the server, first modify a  local  copy
30       of  the  keyboard  description  and then use either XkbSetNames, or, to
31       save network traffic, use a XkbNameChangesRec structure  and  call  Xk‐
32       bChangeNames  to  download  the changes to the server.  XkbSetNames and
33       XkbChangeNames can generate BadAlloc, BadAtom, BadLength, BadMatch, and
34       BadImplementation errors.
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STRUCTURES

37       The  XkbNameChangesRec  allows applications to identify small modifica‐
38       tions to the symbolic names and effectively reduces the amount of traf‐
39       fic sent to the server:
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41           typedef struct _XkbNameChanges {
42               unsigned int   changed;            /∗ name components that have changed
43       */
44               unsigned char  first_type;         /∗ first key type with a new name */
45               unsigned char  num_types;          /∗ number of types with new names */
46               unsigned char  first_lvl;          /∗ first key type with new level
47       names */
48               unsigned char  num_lvls;           /∗ number of key types with new level
49       names */
50               unsigned char  num_aliases;        /∗ if key aliases changed, total
51       number of key aliases */
52               unsigned char  num_rg;             /∗ if radio groups changed, total
53       number of radio groups */
54               unsigned char  first_key;          /∗ first key with a new name */
55               unsigned char  num_keys;           /∗ number of keys with new names */
56               unsigned short changed_vmods;      /∗ mask of virtual modifiers for
57       which names have changed */
58               unsigned long  changed_indicators; /∗ mask of indicators for which names
59       were changed */
60               unsigned char  changed_groups;     /∗ mask of groups for which names
61       were changed */
62           } XkbNameChangesRec, *XkbNameChangesPtr
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64       The  changed  field specifies the name components that have changed and
65       is the bitwise inclusive OR of the valid names mask bits defined in Ta‐
66       ble  1. The rest of the fields in the structure specify the ranges that
67       have changed for the various kinds of symbolic names, as shown in Table
68       2.
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70       Xkb  provides  several functions that work with symbolic names. Each of
71       these functions uses a mask to specify individual fields of the  struc‐
72       tures  described  above.  These  masks  and  their relationships to the
73       fields in a keyboard description are shown in Table 1.
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75
76                                 Table 1 Symbolic Names Masks
77       ─────────────────────────────────────────────────────────────────────────────────
78       Mask Bit                 Value      Keyboard     Field
79                                           Component
80       ─────────────────────────────────────────────────────────────────────────────────
81       XkbKeycodesNameMask      (1<<0)     Xkb->names   keycodes
82       XkbGeometryNameMask      (1<<1)     Xkb->names   geometry
83       XkbSymbolsNameMask       (1<<2)     Xkb->names   symbols
84       XkbPhysSymbolsNameMask   (1<<3)     Xkb->names   phys_symbols
85       XkbTypesNameMask         (1<<4)     Xkb->names   type
86       XkbCompatNameMask        (1<<5)     Xkb->names   compat
87       XkbKeyTypeNamesMask      (1<<6)     Xkb->map     type[*].name
88       XkbKTLevelNamesMask      (1<<7)     Xkb->map     type[*].lvl_names[*]
89       XkbIndicatorNamesMask    (1<<8)     Xkb->names   indicators[*]
90       XkbKeyNamesMask          (1<<9)     Xkb->names   keys[*], num_keys
91       XkbKeyAliasesMask        (1<<10)    Xkb->names   key_aliases[*], num_key_aliases
92       XkbVirtualModNamesMask   (1<<11)    Xkb->names   vmods[*]
93       XkbGroupNamesMask        (1<<12)    Xkb->names   groups[*]
94       XkbRGNamesMask           (1<<13)    Xkb->names   radio_groups[*], num_rg
95       XkbComponentNamesMask    (0x3f)     Xkb->names   keycodes,
96                                                        geometry,
97                                                        symbols,
98                                                        physical symbols,
99                                                        types, and
100                                                        compatibility map
101       XkbAllNamesMask          (0x3fff)   Xkb->names   all name components
102
103
104                                Table 2 XkbNameChanges Fields
105       ────────────────────────────────────────────────────────────────────────────────
106       Mask                     Fields               Component    Field
107       ────────────────────────────────────────────────────────────────────────────────
108       XkbKeyTypeNamesMask      first_type,          Xkb->map     type[*].name
109                                num_types
110       XkbKTLevelNamesMask      first_lvl,           Xkb->map     type[*].lvl_names[*]
111                                num_lvls
112       XkbKeyAliasesMask        num_aliases          Xkb->names   key_aliases[*]
113       XkbRGNamesMask           num_rg               Xkb->names   radio_groups[*]
114       XkbKeyNamesMask          first_key,           Xkb->names   keys[*]
115                                num_keys
116       XkbVirtualModNamesMask   changed_vmods        Xkb->names   vmods[*]
117       XkbIndicatorNamesMask    changed_indicators   Xkb->names   indicators[*]
118       XkbGroupNamesMask        changed_groups       Xkb->names   groups[*]
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DIAGNOSTICS

121       BadAlloc       Unable to allocate storage
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123       BadAtom        A name is neither a valid Atom or None
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125       BadImplementation
126                      Invalid reply from server
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128       BadLength      The length of a request is shorter or longer  than  that
129                      required to minimally contain the arguments
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131       BadMatch       A  compatible  version  of  Xkb was not available in the
132                      server or an argument has correct type and range, but is
133                      otherwise invalid
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SEE ALSO

136       XkbSetNames(3)
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140X Version 11                     libX11 1.7.0                XkbChangeNames(3)
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