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display 256 colors in terminal
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# print 256-color pattern | |
function sheet:color { | |
local block row col fg_color bg_color | |
local i | |
print -P "$( | |
echo -n '\n' | |
# the 16 base colors | |
for i in {0..15}; do | |
# use shell substitution for pad zero or space to variable | |
bg_color="${${:-000${i}}:(-3)}" | |
i="${${:- ${i}}:(-3)}" | |
if (( bg_color > 0 )); then | |
fg_color=000 | |
else | |
fg_color=015 | |
fi | |
if (( i % 6 == 0 )); then | |
echo -n "${reset_color} " | |
fi | |
echo -n "${reset_color} ${FG[${fg_color}]}${BG[${bg_color}]} $i" | |
done | |
echo -n "${reset_color}\n\n " | |
# 6 colors blocks (per 6 x 6) | |
for row in {0..11}; do | |
if (( row % 6 == 0 )); then | |
echo -n "${reset_color}\n " | |
fi | |
if (( (row % 6) > 2 )); then | |
fg_color=000 | |
else | |
fg_color=015 | |
fi | |
for block in {0..2}; do | |
for col in {0..5}; do | |
i=$(( 16 + (row / 6) * 36 * 3 + (row % 6) * 6 + block * 36 + col )) | |
# use shell substitution for pad zero or space to variable | |
bg_color="${${:-000${i}}:(-3)}" | |
i="${${:- ${i}}:(-3)}" | |
echo -n "${reset_color} ${FG[${fg_color}]}${BG[${bg_color}]} $i" | |
done | |
echo -n "${reset_color} " | |
done | |
echo -n "${reset_color}\n " | |
done | |
echo -n "\n" | |
# the two lines gray level colors | |
for i in {232..255}; do | |
if (( (i - 16) % 12 == 0 )); then | |
echo -n "\n" | |
fi | |
if (( (i - 16) % 6 == 0 )); then | |
echo -n "${reset_color} " | |
fi | |
if (( i > 243 )); then | |
fg_color=000 | |
else | |
fg_color=015 | |
fi | |
echo -n "${reset_color} ${FG[${fg_color}]}${BG[$i]} $i" | |
done | |
)" | |
} |
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