XkbUpdateMapFromCore(3)
NAME
XkbUpdateMapFromCore - Update a local Xkb keyboard map to reflect the
mapping expressed by a core format mapping
SYNOPSIS
Bool XkbUpdateMapFromCore (XkbDescPtr xkb, KeyCode first_key, int num_keys, int map_width, KeySym *core_keysyms, XkbChangesPtr changes);
ARGUMENTS
- xkb keyboard description to update
- - first_key
- keycode of first key description to update
- - num_keys
- number of key descriptions to update
- - map_width
- width of core protocol keymap
- - core_keysyms
- symbols in core protocol keymap
- - changes
- backfilled with changes made to Xkb
DESCRIPTION
Xkb provides several functions that make it easier to apply the compatibility map to configure a client-side Xkb keyboard mapping, given a
core protocol representation of part or all of a keyboard mapping.
Obtain a core protocol representation of a keyboard mapping from an
actual server (by using XGetKeyboardMapping, for example), a data file,
or some other source.
XkbUpdateMapFromCore interprets input argument information representing
a keyboard map in core format to update the Xkb keyboard description
passed in xkb. Only a portion of the Xkb map is updated - the portion
corresponding to keys with keycodes in the range first_key through
first_key + num_keys - 1. If XkbUpdateMapFromCore is being called in
response to a MappingNotify event, first_key and num_keys are reported
in the MappingNotify event. core_keysyms contains the keysyms corresponding to the keycode range being updated, in core keyboard description order. map_width is the number of keysyms per key in
core_keysyms. Thus, the first map_width entries in core_keysyms are
for the key with keycode first_key, the next map_width entries are for
key first_key + 1, and so on.
In addition to modifying the Xkb keyboard mapping in xkb, XkbUpdateMapFromCore backfills the changes structure whose address is passed
in changes to indicate the modifications that were made. You may then
use changes in subsequent calls such as XkbSetMap, to propagate the
local modifications to a server.