'\" t
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.TH XkbGetMap __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
.SH NAME
XkbGetMap \- Allocate an XkbDescRec structure and populate it with the server's
keyboard
client map and server map
.SH SYNOPSIS
.B XkbDescPtr XkbGetMap
(
.I display,
.I which,
.I device_spec
)
.br
Display * \fIdisplay\fP\^;
.br
unsigned int \fIwhich\fP\^;
.br
unsigned int \fIdevice_spec\fP\^;
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I \- display
connection to X server
.TP
.I \- which
mask selecting subcomponents to populate
.TP
.I \- device_spec
device_id, or XkbUseCoreKbd
.SH DESCRIPTION
.LP
Xkb provides two functions to obtain the keyboard mapping components from the
server. The
first function,
.I XkbGetMap,
allocates an XkbDescRec structure, retrieves mapping components from the server,
and
stores them in the XkbDescRec structure it just allocated. The second function,
.I XkbGetUpdatedMap,
retrieves mapping components from the server and stores them in an XkbDescRec
structure
that has previously been allocated.
To allocate an XkbDescRec structure and populate it with the server's keyboard
client map
and server map, use
.I XkbGetMap. XkbGetMap
is similar to
.I XkbGetKeyboard,
but is used only for obtaining the address of an XkbDescRec structure that is
populated
with keyboard mapping components. It allows finer control over which
substructures of the
keyboard mapping components are to be populated.
.I XkbGetKeyboard
always returns fully populated components, while
.I XkbGetMap
can be instructed to return a partially populated component.
The
.I which mask is a bitwise inclusive OR of the masks defined in Table 14.1. Only
those
portions of the keyboard server map and the keyboard client maps that are
specified in
.I which
are allocated and populated.
In addition to allocating and obtaining the server map and the client map,
.I XkbGetMap
also sets the
.I device_spec,
the
.I min_key_code,
and
.I max_key_code
fields of the keyboard description.
.I XkbGetMap
is synchronous; it queries the server for the desired information, waits for a
reply, and
then returns. If successful,
.I XkbGetMap
returns a pointer to the XkbDescRec structure it allocated. If unsuccessful,
.I XkbGetMap
returns NULL. When unsuccessful, one of the following protocol errors is also
generated:
BadAlloc (unable to allocate the XkbDescRec structure), BadValue (some mask bits
in
.I which
are undefined), or BadImplementation (a compatible version of the Xkb extension
is not
available in the server). To free the returned data, use
.I XkbFreeClientMap.
Xkb also provides convenience functions to get partial component definitions
from the
server. These functions are specified in the "convenience functions" column in
Table
1. Refer to the sections listed in the table for more information on these
functions.
.TS
c s s s s
c s s s s
l l l l l
l l l l l
lw(3i) l l lw(1i) lw(3i).
Table 1 Xkb Mapping Component Masks
and Convenience Functions
_
Mask Value Map Fields Convenience
Functions
_
T{
XkbKeyTypesMask
T} (1<<0) client T{
types
.br
size_types
.br
num_types
T} T{
XkbGetKeyTypes
.br
XkbResizeKeyType
.br
XkbCopyKeyType
.br
XkbCopyKeyTypes
T}
T{
XkbKeySymsMask
T} (1<<1) client T{
syms
.br
size_syms
.br
num_syms
.br
key_sym_map
T} T{
XkbGetKeySyms
.br
XkbResizeKeySyms
.br
XkbChangeTypesOfKey
T}
T{
XkbModifierMapMask
T} (1<<2) client modmap T{
XkbGetKeyModifierMap
T}
T{
XkbExplicitComponentsMask
T} (1<<3) server T{
explicit
T} T{
XkbGetKeyExplicitComponents
T}
T{
XkbKeyActionsMask
T} (1<<4) server T{
key_acts
.br
acts
.br
num_acts
.br
size_acts
T} T{
XkbGetKeyActions
.br
XkbResizeKeyActions
T}
T{
XkbKeyBehaviorsMask
T} (1<<5) server T{
behaviors
T} T{
XkbGetKeyBehaviors
T}
T{
XkbVirtualModsMask
T} (1<<6) server T{
vmods
T} T{
XkbGetVirtualMods
T}
T{
XkbVirtualModMapMask
T} (1<<7) server T{
vmodmap
T} T{
XkbGetVirtualModMap
T}
.TE
.nf
.bp
Xkb defines combinations of these masks for convenience:
#define XkbResizableInfoMask (XkbKeyTypesMask)
#define XkbAllClientInfoMask (XkbKeyTypesMask | XkbKeySymsMask |
XkbModifierMapMask)
#define XkbAllServerInfoMask (XkbExplicitComponentsMask |
XkbKeyActionsMask |
XkbKeyBehaviorsMask |
XkbVirtualModsMask |
XkbVirtualModMapMask)
#define XkbAllMapComponentsMask XkbAllClientInfoMask |
XkbAllServerInfoMask)
.fi
Key types, symbol maps, and actions are all interrelated: changes in one require
changes
in the others. The convenience functions make it easier to edit these components
and
handle the interdependencies.
.SH STRUCTURES
.LP
The complete description of an Xkb keyboard is given by an XkbDescRec. The
component
structures in the XkbDescRec represent the major Xkb components.
.nf
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;
.fi
The
.I display
field points to an X display structure. The
.I flags field is private to the library: modifying
.I flags
may yield unpredictable results. The
.I device_spec
field specifies the device identifier of the keyboard input device, or
XkbUseCoreKeyboard, which specifies the core keyboard device. The
.I min_key_code
and
.I 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 2.
.TS
c s s
l l l
l l l.
Table 2 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)
.TE
.SH "SEE ALSO"
.BR XkbChangeTypesOfKey (__libmansuffix__),
.BR XkbCopyKeyType (__libmansuffix__),
.BR XkbCopyKeyTypes (__libmansuffix__),
.BR XkbFreeClientMap (__libmansuffix__),
.BR XkbGetKeyActions (__libmansuffix__),
.BR XkbGetKeyBehaviors (__libmansuffix__),
.BR XkbGetKeyboard (__libmansuffix__),
.BR XkbGetKeyExplicitComponents (__libmansuffix__),
.BR XkbGetKeyModifierMap (__libmansuffix__),
.BR XkbGetKeySyms (__libmansuffix__),
.BR XkbGetKeyTypes (__libmansuffix__),
.BR XkbGetUpdatedMap (__libmansuffix__),
.BR XkbGetVirtualModMap (__libmansuffix__),
.BR XkbGetVirtualMods (__libmansuffix__),
.BR XkbResizeKeyActions (__libmansuffix__),
.BR XkbResizeKeySyms (__libmansuffix__),
.BR XkbResizeKeyType (__libmansuffix__)