bsdconfig/share/keymap.subr

if [ ! "$_KEYMAP_SUBR" ]; then _KEYMAP_SUBR=1
#
# Copyright (c) 2013 Devin Teske
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: stable/10/usr.sbin/bsdconfig/share/keymap.subr 256361 2013-10-11 23:12:05Z dteske $
#
############################################################ INCLUDES

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." keymap.subr
f_include $BSDCFG_SHARE/struct.subr

############################################################ CONFIGURATION

#
# Defaults taken from usr.sbin/kbdmap/kbdmap.h
#
: ${DEFAULT_LANG:=en}
: ${DEFAULT_KEYMAP_DIR:=/usr/share/syscons/keymaps}

############################################################ GLOBALS

KEYMAPS=

# A "keymap" from kbdmap's point of view
f_struct_define KEYMAP \
	desc \
	keym \
	mark

#
# Default behavior is to call f_keymap_get_all() automatically when loaded.
#
: ${KEYMAP_SELF_SCAN_ALL=1}

############################################################ FUNCTIONS

# f_keymap_register $name $desc $keym $mark
#
# Register a keymap. A `structure' (see struct.subr) is created with the name
# keymap_$name (so make sure $name contains only alpha-numeric characters or
# the underscore, `_'). The remaining arguments after $name correspond to the
# propertise of the `KEYMAP' structure-type (defined above).
#
# If not already registered, the keymap is then appended to the KEYMAPS
# environment variable, a space-separated list of all registered keymaps.
#
f_keymap_register()
{
	local name="$1" desc="$2" keym="$3" mark="$4"

	f_struct_new KEYMAP "keymap_$name" || return $FAILURE
	keymap_$name set desc "$desc"
	keymap_$name set keym "$keym"
	keymap_$name set mark "$mark"

	# Scan our global register to see if needs ammending
	local k found=
	for k in $KEYMAPS; do
		[ "$k" = "$name" ] || continue
		found=1 && break
	done
	[ "$found" ] || KEYMAPS="$KEYMAPS $name"

	return $SUCCESS
}

# f_keymap_checkfile $keymap
#
# Check that $keymap is a readable kbdmap(5) file. Returns success if $keymap
# is a file, is readable, and exists in $DEFAULT_KEYMAP_DIR; otherwise failure.
# If debugging is enabled, an appropriate debug error message is printed if
# $keymap is not available.
#
f_keymap_checkfile()
{
	local keym="$1"

	# Fixup keymap if it doesn't already contain at least one `/'
	[ "${keym#*/}" = "$keym" ] && keym="$DEFAULT_KEYMAP_DIR/$keym"

	# Short-cuts
	[ -f "$keym" -a -r "$keym" ] && return $SUCCESS
	f_debugging || return $FAILURE

	# Print an appropriate debug error message
	if [ ! -e "$keym" ]; then
		f_dprintf "%s: No such file or directory" "$keym"
	elif [ ! -f "$keym" ]; then
		f_dprintf "%s: Not a file!" "$keym"
	elif [ ! -r "$keym" ]; then
		f_dprintf "%s: Permission denied" "$keym"
	fi

	return $FAILURE
}

# f_keymap_get_all
#
# Get all keymap information for kbdmap(5) entries both in the database and
# loosely existing in $DEFAULT_KEYMAP_DIR.
#
f_keymap_get_all()
{
	local fname=f_keymap_get_all
	local lang="${LC_ALL:-${LC_CTYPE:-${LANG:-$DEFAULT_LANG}}}"
	[ "$lang" = "C" ] && lang="$DEFAULT_LANG"

	f_dprintf "%s: Looking for keymap files..." $fname
	f_dialog_info "$msg_looking_for_keymap_files"
	f_dprintf "DEFAULT_LANG=[%s]" "$DEFAULT_LANG"

	eval "$( awk -F: -v lang="$lang" -v lang_default="$DEFAULT_LANG" '
		BEGIN {
			# en_US.ISO8859-1 -> en_..\.ISO8859-1
			dialect = lang
			if (length(dialect) >= 6 &&
			    substr(dialect, 3, 1) == "_")
				dialect = substr(dialect, 1, 3) ".." \
				          substr(dialect, 6)
			printf "f_dprintf \"dialect=[%%s]\" \"%s\";\n", dialect

			# en_US.ISO8859-1 -> en
			lang_abk = lang
			if (length(lang_abk) >= 3 &&
			    substr(lang_abk, 3, 1) == "_")
				lang_abk = substr(lang_abk, 1, 2)
			printf "f_dprintf \"lang_abk=[%%s]\" \"%s\";\n",
			       lang_abk
		}
		function find_token(buffer, token)
		{
			if (split(buffer, tokens, /,/) == 0) return 0
			found = 0
			for (t in tokens)
				if (token == tokens[t]) { found = 1; break }
			return found
		}
		function add_keymap(desc,mark,keym)
		{
			marks[keym] = mark
			name = keym
			gsub(/[^[:alnum:]_]/, "_", name)
			gsub(/'\''/, "'\''\\'\'''\''", desc);
			printf "f_keymap_checkfile %s && " \
			       "f_keymap_register %s '\'%s\'' %s %u\n",
			       keym, name, desc, keym, mark
		}
		!/^[[:space:]]*(#|$)/ {
			sub(/^[[:space:]]*/, "", $0)
			keym = $1
			if (keym ~ /^(MENU|FONT)$/) next
			lg = ($2 == "" ? lang_default : $2)

			# Match the entry and store the type of match we made
			# as the mark value (so that if we make a better match
			# later on with a higher mark, it overwrites previous)

			mark = marks[keym];
			if (find_token(lg, lang))
				add_keymap($3, 4, keym) # Best match
			else if (mark <= 3 && find_token(lg, dialect))
				add_keymap($3, 3, keym)
			else if (mark <= 2 && find_token(lg, lang_abk))
				add_keymap($3, 2, keym)
			else if (mark <= 1 && find_token(lg, lang_default))
				add_keymap($3, 1, keym)
			else if (mark <= 0)
				add_keymap($3, 0, keym)
		}
	' "$DEFAULT_KEYMAP_DIR/INDEX.${DEFAULT_KEYMAP_DIR##*/}" )"


	#
	# Look for keymaps not in database
	#
	local direntry keym name
	set +f # glob
	for direntry in "$DEFAULT_KEYMAP_DIR"/*; do
		[ "${direntry##*.}" = ".kbd" ] || continue
		keym="${direntry##*/}"
		f_str2varname "$keym" name
		f_struct keymap_$name && continue
		f_keymap_checkfile "$keym" &&
			f_keymap_register $name "${keym%.*}" "$keym" 0
		f_dprintf "%s: not in kbdmap(5) database" "$keym"
	done

	#
	# Sort the items by their descriptions
	#
	f_dprintf "%s: Sorting keymap entries by description..." $fname
	KEYMAPS=$(
		for k in $KEYMAPS; do
			echo -n "$k "
			# NOTE: Translate '8x8' to '8x08' before sending to
			# sort(1) so that things work out as we might expect.
			debug= keymap_$k get desc | sed -e 's/8x8/8x08/g'
		done | sort -k2 | awk '{
			printf "%s%s", (started ? " " : ""), $1; started = 1
		}'
	)

	return $SUCCESS
}

# f_keymap_kbdcontrol $keymap
#
# Install keyboard map file from $keymap.
#
f_keymap_kbdcontrol()
{
	local keymap="$1"

	[ "$keymap" ] || return $SUCCESS

	# Fixup keymap if it doesn't already contain at least one `/'
	[ "${keymap#*/}" = "$keymap" ] && keymap="$DEFAULT_KEYMAP_DIR/$keymap"

	[ "$USE_XDIALOG" ] || kbdcontrol -l "$keymap"
}

############################################################ MAIN

#
# Scan for keymaps unless requeted otherwise
#
f_dprintf "%s: KEYMAP_SELF_SCAN_ALL=[%s]" keymap.subr "$KEYMAP_SELF_SCAN_ALL"
case "$KEYMAP_SELF_SCAN_ALL" in
""|0|[Nn][Oo]|[Oo][Ff][Ff]|[Ff][Aa][Ll][Ss][Ee]) : do nothing ;;
*) f_keymap_get_all
esac

f_dprintf "%s: Found %u keymap file(s)." keymap.subr \
          "$( set -- $KEYMAPS; echo $# )"

f_dprintf "%s: Successfully loaded." keymap.subr

fi # ! $_KEYMAP_SUBR