u/Kitchen_Office8072

gtk2 failed to compile in a chroot today, so I made deepseek spit this out, so I could uninstall nitrogen.

#!/usr/bin/env bash
set -euo pipefail

DATA_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/xwp"
mkdir -p "$DATA_DIR"

# Save a single output's arguments
save_output() {
    local output="$1"
    shift
    printf "%s\n" "$@" > "$DATA_DIR/last_$output"
}

# Parse command line arguments (as array) and save per output
save_per_output() {
    local args=("$@")
    local current_out="" current_args=()
    while (($#)); do
        case "$1" in
            --output)
                # Save previous output if any
                if [[ -n "$current_out" ]]; then
                    save_output "$current_out" "${current_args[@]}"
                fi
                shift
                if (($# == 0)); then
                    echo "Error: --output missing argument" >&2
                    exit 1
                fi
                current_out="$1"
                current_args=()
                ;;
            *)
                if [[ -z "$current_out" ]]; then
                    current_out="_default"
                fi
                current_args+=("$1")
                ;;
        esac
        shift
    done
    # Save the last output
    if [[ -n "$current_out" ]]; then
        save_output "$current_out" "${current_args[@]}"
    fi
}

# Restore all saved outputs
restore_all() {
    local cmd=()
    for file in "$DATA_DIR"/last_*; do
        [[ -f "$file" ]] || continue
        out="${file##*/last_}"
        mapfile -t stored < "$file"
        (( ${#stored[@]} == 0 )) && continue
        cmd+=("--output" "$out" "${stored[@]}")
    done
    if (( ${#cmd[@]} == 0 )); then
        echo "Error: No saved wallpaper settings." >&2
        exit 1
    fi
    xwallpaper "${cmd[@]}"
}

# Save preset
save_preset() {
    local n="$1"
    [[ -n "$n" ]] || { echo "Usage: --save-preset N" >&2; exit 1; }
    local full_cmd=()
    for file in "$DATA_DIR"/last_*; do
        [[ -f "$file" ]] || continue
        out="${file##*/last_}"
        mapfile -t stored < "$file"
        full_cmd+=("--output" "$out" "${stored[@]}")
    done
    (( ${#full_cmd[@]} == 0 )) && { echo "No current wallpaper to save." >&2; exit 1; }
    printf "%s\n" "${full_cmd[@]}" > "$DATA_DIR/preset_$n"
}

# Load preset
load_preset() {
    local n="$1"
    local preset_file="$DATA_DIR/preset_$n"
    [[ -f "$preset_file" ]] || { echo "Error: Preset $n not found." >&2; exit 1; }
    mapfile -t full_cmd < "$preset_file"
    xwallpaper "${full_cmd[@]}"
    save_per_output "${full_cmd[@]}"
}

# List presets
list_presets() {
    local found=0
    for f in "$DATA_DIR"/preset_*; do
        [[ -f "$f" ]] && echo "Preset ${f##*_}" && found=1
    done
    (( found == 0 )) && echo "No presets saved."
}

# Main
if [[ $# -eq 0 ]]; then
    cat <<EOF
Usage: $0 [--restore | --save-preset N | --preset N | --list-presets | xwallpaper-args]
EOF
    exit 1
fi

case "$1" in
    --restore)        restore_all ;;
    --save-preset)    shift; save_preset "$1" ;;
    --preset)         shift; load_preset "$1" ;;
    --list-presets)   list_presets ;;
    *)
        if xwallpaper "$@"; then
            # Convert "$@" to array to pass to function (preserves args with spaces)
            save_per_output "$@"
        else
            echo "xwallpaper command failed" >&2
            exit 1
        fi
        ;;
esac

i3 config example:

# SET WALLPAPERS
# SUPER+R
set $wallpapers  [s]elect for 0 | [S]elect for 1 \
| select-presets: [`-9] | save presets [(shift)3-9]          \
[Escape] [Enter] or [Space] to exit

mode "$wallpapers" {

  bindsym s exec \
    alacritty --class wllppr -e \
    ~/.config/i3/scripts/wllppr;\
    mode default
  bindsym shift+s exec \
    alacritty --class wllppr -e \
    ~/.config/i3/scripts/wllppr1;\
    mode default

  bindsym grave exec \
    xwp --preset 0
  bindsym 1 exec \
    xwp --preset 1
  bindsym 2 exec \
    xwp --preset 2
  bindsym 3 exec \
    xwp --preset 3
  bindsym 4 exec \
    xwp --preset 4
  bindsym 5 exec \
    xwp --preset 5
  bindsym 6 exec \
    xwp --preset 6
  bindsym 7 exec \
    xwp --preset 7
  bindsym 8 exec \
    xwp --preset 8
  bindsym 9 exec \
    xwp --preset 9

  bindsym shift+numbersign exec \
    xwp --save-preset 3; mode default
  bindsym shift+dollar exec \
    xwp --save-preset 4; mode default
  bindsym shift+percent exec \
    xwp --save-preset 5; mode default
  bindsym shift+asciicircum exec \
    xwp --save-preset 6; mode default
  bindsym shift+ampersand exec \
    xwp --save-preset 7; mode default
  bindsym shift+asterisk exec \
    xwp --save-preset 8; mode default
  bindsym shift+parenleft exec \
    xwp --save-preset 9; mode default

  bindsym Escape mode default
  bindsym Enter mode default
  bindsym space mode default
  bindsym $mod+r mode default
}