#!/bin/sh

# Take a screenshot of the whole screen
# (i.e., what "<Shift>Print" does)
#
# The screenshot machinery lives inside `gnome-shell`
# and cannot be called directly because
# its D-Bus methods are restricted to trusted callers
#
# => We synthesize the key press instead, after a short delay
#    so that a launcher's keyboard grab (e.g., `rofi`) is released

set -eu


[ "${XDG_SESSION_TYPE:-}" = "x11" ] || {
    echo "X11 only (xdotool)" >&2
    exit 1
}


# Optional countdown in seconds (e.g., `screenshot-screen 3`),
# defaulting to 0.2
countdown="${1:-0.2}"

case "$countdown" in
    ''|.|*[!0-9.]*|*.*.*)
        echo "Not a number: $countdown" >&2
        exit 1
        ;;
esac

sleep "$countdown"


xdotool key shift+Print