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[console] Support changing keyboard map at runtime

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Provide the special keyboard map named "dynamic" which allows the
active keyboard map to be selected at runtime via the ${keymap}
setting, e.g.:

  #define KEYBOARD_MAP dynamic

  iPXE> set keymap uk

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2022-02-16 00:14:38 +00:00
parent 674963e2a6
commit 304333dace
4 changed files with 174 additions and 2 deletions
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42
src/core/keymap.c
View File

@@ -23,6 +23,7 @@
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <string.h>
#include <ctype.h>
#include <ipxe/keys.h>
#include <ipxe/keymap.h>
@@ -49,7 +50,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
static TABLE_START ( keymap_start, KEYMAP );
/** Current keyboard mapping */
static struct keymap *keymap = keymap_start;
static struct keymap *keymap_current = keymap_start;
/**
* Remap a key
@@ -58,6 +59,7 @@ static struct keymap *keymap = keymap_start;
* @ret mapped Mapped character
*/
unsigned int key_remap ( unsigned int character ) {
struct keymap *keymap = keymap_current;
unsigned int mapped = ( character & KEYMAP_MASK );
struct keymap_key *key;
@@ -88,6 +90,42 @@ unsigned int key_remap ( unsigned int character ) {
/* Clear flags */
mapped &= ASCII_MASK;
DBGC2 ( &keymap, "KEYMAP mapped %04x => %02x\n", character, mapped );
DBGC2 ( &keymap_current, "KEYMAP mapped %04x => %02x\n",
character, mapped );
return mapped;
}
/**
* Find keyboard map by name
*
* @v name Keyboard map name
* @ret keymap Keyboard map, or NULL if not found
*/
struct keymap * keymap_find ( const char *name ) {
struct keymap *keymap;
/* Find matching keyboard map */
for_each_table_entry ( keymap, KEYMAP ) {
if ( strcmp ( keymap->name, name ) == 0 )
return keymap;
}
return NULL;
}
/**
* Set keyboard map
*
* @v keymap Keyboard map, or NULL to use default
*/
void keymap_set ( struct keymap *keymap ) {
/* Use default keymap if none specified */
if ( ! keymap )
keymap = keymap_start;
/* Set new keyboard map */
if ( keymap != keymap_current )
DBGC ( &keymap_current, "KEYMAP using \"%s\"\n", keymap->name );
keymap_current = keymap;
}