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#!/bin/bash
function print_palette() {
L=$(( LOWER / 256))
U=$(( (UPPER-1) / 256))
for ((p = $L; p <= $U; p++))
do
echo "slot $((p*256))..$((p*256+255)):"
echo -ne "\x1bP;1q"
for i in {0..15}
do
a=$((i * 16 + p * 256))
for j in {0..15}
do
echo -ne "#$((a+j))!6~"
done
echo -ne "\$-"
done
echo -e "\x1b\\"
done
}
colors=undefined
max_colors=undefined
echo "Terminal Reports (XTSMGRAPHICS):"
IFS=";" read -a REPLY -s -t 1 -d "S" -p $'\e[?1;1;0S'
[[ ${REPLY[1]} == "0" ]] && colors=${REPLY[2]}
echo "active colors: ${colors}"
IFS=";" read -a REPLY -s -t 1 -d "S" -p $'\e[?1;4;0S'
[[ ${REPLY[1]} == "0" ]] && max_colors=${REPLY[2]}
echo "max colors : ${max_colors}"
echo
# query up to colors by default
# if colors is undefined (no XTSMGRAPHICS), assume 256
ARG1=${1:-${colors}}
if [[ $colors == "undefined" ]]
then
ARG1=${1:-256}
fi
LOWER=0
UPPER=$ARG1
ARG2=${2:-undefined}
if [[ $ARG2 != "undefined" ]]
then
LOWER=ARG1
UPPER=ARG2
fi
if [[ $colors != "undefined" ]]
then
if [[ $colors -lt $UPPER ]] || [[ $colors -lt 256 ]]
then
echo -e "\x1b[33mNote: Active colors is smaller than test range."
echo -e "A spec-conform terminal may repeat colors in 'slot mod ${colors}'.\x1b[m"
echo
fi
else
echo -e "\x1b[33mNote: Cannot query active colors."
echo -e "The terminal may repeat colors beyond it max slot (e.g. slot mod 16).\x1b[m"
echo
fi
print_palette
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