confOS/.config/fish/functions/latex-color.fish
2024-10-06 21:10:17 +02:00

55 lines
1.5 KiB
Fish

function latex-color --description "Get the LaTeX color from HEX code"
# Declare our arguments
argparse h/help -- $argv
# Get function name
set current_name $(status current-function)
# Check if not enough arguments provided, or help menu
if set -ql _flag_help || test -z $argv[1]
echo -e "Usage: $current_name \"hexcode\""
echo -e " $current_name [-h|--help] - Show this help message"
return 0
end
# Remove '#'
set hex $argv[1]
if string match -qr '^#' -- $hex
set hex (string sub -s 2 $hex)
end
# Check if the hex code is valid
if not string match -qir '^[0-9A-F]{3,8}$' $hex
and not contains $(string length $hex) $(string split " " "3 4 6 8")
echo "Error: Invalid HEX code" 1>&2
return 1
end
# Expand 3 to 4
if test (string length $hex) -eq 3
set hex $(string join "" $hex "F")
end
# Expand 4 to 8
if test (string length $hex) -eq 4
set hex "$(string replace -ar '(.)' '$1$1' $hex)FF"
end
# Expand 6 to 8
if test (string length $hex) -eq 6
set hex $(string join "" $hex "FF")
end
# Convert hex to RGB
set r (math "0x$(string sub -s 1 -l 2 $hex) / 255")
set g (math "0x$(string sub -s 3 -l 2 $hex) / 255")
set b (math "0x$(string sub -s 5 -l 2 $hex) / 255")
set a (math "0x$(string sub -s 7 -l 2 $hex) / 255")
set -x LC_NUMERIC C
if test $a -eq 1
printf "{%.2f, %.2f, %.2f}\n" $r $g $b
else
printf "{%.2f, %.2f, %.2f, %.2f}\n" $r $g $b $a
end
end