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#!/bin/sh
# Switch the live sky behind the desktop: off, Hyperspace, Nebula, Digital Rain.
#
# Usage: wayfire-background-cycle [next|off|hyperspace|nebula|rain]
#
# Edits [live-wallpaper] enabled and effect in the user's wayfire.ini, which
# Wayfire reloads by itself, so the choice applies at once and stays after the
# next login. "off" shows the generated background again. Bound to Super+Ctrl+W
# in the shipped wayfire.ini.
config="${WAYFIRE_CONFIG_FILE:-${XDG_CONFIG_HOME:-$HOME/.config}/wayfire.ini}"
current=$(awk '
/^[ \t]*\[.*\][ \t]*$/ { s = $0; gsub(/^[ \t]*\[|\][ \t]*$/, "", s); in_lw = (s == "live-wallpaper"); next }
in_lw && /^[ \t]*enabled[ \t]*=/ { v = $0; sub(/^[^=]*=[ \t]*/, "", v); sub(/[ \t\r]*$/, "", v); enabled = tolower(v) }
in_lw && /^[ \t]*effect[ \t]*=/ { v = $0; sub(/^[^=]*=[ \t]*/, "", v); sub(/[ \t\r]*$/, "", v); effect = v }
END { if (enabled == "true" || enabled == "1") print (effect == "" ? "hyperspace" : effect); else print "off" }
' "$config") || exit 1
case "${1:-next}" in
next)
case "$current" in
off) choice=hyperspace ;;
hyperspace) choice=nebula ;;
nebula) choice=rain ;;
rain) choice=off ;;
*) choice=hyperspace ;;
esac ;;
off|hyperspace|nebula|rain) choice=$1 ;;
*) sed -n '2,9s/^# \{0,1\}//p' "$0" >&2; exit 2 ;;
esac
enabled=true
[ "$choice" = off ] && enabled=false
updated=$(awk -v enabled="$enabled" -v effect="$choice" '
function add() {
if (!has_enabled) print "enabled = " enabled
if (!has_effect && effect != "off") print "effect = " effect
has_enabled = has_effect = 1
}
/^[ \t]*\[.*\][ \t]*$/ {
if (in_lw) add()
s = $0; gsub(/^[ \t]*\[|\][ \t]*$/, "", s); in_lw = (s == "live-wallpaper"); if (in_lw) found = 1
print; next
}
in_lw && /^[ \t]*enabled[ \t]*=/ { print "enabled = " enabled; has_enabled = 1; next }
in_lw && /^[ \t]*effect[ \t]*=/ { print (effect == "off" ? $0 : "effect = " effect); has_effect = 1; next }
{ print }
END { if (in_lw) add(); else if (!found) { print ""; print "[live-wallpaper]"; add() } }
' "$config") || exit 1
[ -n "$updated" ] || exit 1
# Written in place: Wayfire watches this file, also when it is a symlink.
printf '%s\n' "$updated" > "$config" || exit 1
case "$choice" in
off) name="Generated background" ;;
hyperspace) name="Hyperspace" ;;
nebula) name="Nebula" ;;
rain) name="Digital Rain" ;;
esac
command -v notify-send > /dev/null &&
notify-send -a Background -t 2500 "$name" "Super+Ctrl+W for the next one." 2> /dev/null
exit 0
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