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{ pkgs }:
pkgs.writeDashBin "font-size-alacritty" ''
# usage: font-size-alacritty (+N|-N|=N)
# Increase by, decrease by, or set font size to the value N.
set -efu
min_size=5
op=''${1%%[0-9]*}
op=''${op:-=}
value=''${1#[=+-]}
window_id=$(${pkgs.xdotool}/bin/xdotool getactivewindow)
current_size=$(
${pkgs.xorg.xprop}/bin/xprop -notype -id $window_id FONT_SIZE |
${pkgs.gnused}/bin/sed -rn 's/.* = ([0-9]+)$/\1/p'
)
# usage: set_font_size WINDOW_ID FONT_SIZE
set_font_size() {
${pkgs.alacritty}/bin/alacritty msg config -w $1 font.size=$2
${pkgs.xorg.xprop}/bin/xprop -id $1 -f FONT_SIZE 32c -set FONT_SIZE $2
}
# usage: reset_font_size WINDOW_ID
reset_font_size() {
${pkgs.alacritty}/bin/alacritty msg config -w $1 font.size=$min_size
${pkgs.xorg.xprop}/bin/xprop -id $1 -remove FONT_SIZE
}
# usage: make_next_size
make_next_size() {
case $op in
-) next_size=$(expr $current_size - $value) ;;
=) next_size=$value ;;
+)
next_size=$(expr $current_size + $value)
test $next_size -ge $min_size || next_size=$min_size
;;
esac
}
if test -z "$current_size"; then
current_size=0
make_next_size
if test $next_size -ge $min_size; then
${pkgs.alacritty}/bin/alacritty msg config -w $window_id \
font.normal.family='Input Mono' \
font.normal.style=Condensed \
font.bold.family='Input Mono' \
font.bold.style=Bold
set_font_size $window_id $next_size
fi
else
make_next_size
if test $next_size -ge $min_size; then
set_font_size $window_id $next_size
else
${pkgs.alacritty}/bin/alacritty msg config -w $window_id -r
reset_font_size $window_id
fi
fi
''
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