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keymap.h: add note on why XKB_NUM_GROUPS is still there 

Signed-off-by: Ran Benita <ran234@gmail.com>
master
Ran Benita 2012-09-23 22:32:53 +02:00 committed by Daniel Stone
parent d941bc0c03
commit 1d47cbfc4a
1 changed files with 15 additions and 1 deletions
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16
src/keymap.h
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@ -90,8 +90,22 @@
#define XKB_KEY_NAME_LENGTH 4
/* These should all be dynamic. */
/* This limit is artificially enforced, we do not depend on it any where.
* The reason it's still here is that the rules file format does not
* support multiple groups very well, and the rules shipped with
* xkeyboard-config (see rules/evdev) depend on this limit extensively.
* So just lifting this limit would cause problems for people who will use
* more than 4 layouts.
* TODO: Fix the group index syntax in the rules format, preferably in a
* backwards compatible way.
* See e.g. https://bugs.freedesktop.org/show_bug.cgi?id=14372
* Note: A limit on the number of groups we *do* depend on is imposed by
* the size of the xkb_layout_mask_t type (32). This is more than enough
* though.
*/
#define XKB_NUM_GROUPS 4
/* These should all be dynamic. */
#define XKB_NUM_INDICATORS 32
#define XKB_NUM_VIRTUAL_MODS 16
#define XKB_NUM_CORE_MODS 8