djcev.com

#!/bin/sh
#
#  Copyright (c) 2015-2021, Cameron Vanderzanden. Available under the
#  terms of the 2-clause BSD license. Please see the file "LICENSE" in
#  the root dir of this repository for more information.
#
#- hc_swap.sh 2015/01/06 cev, last updated 2021/12/07.
## Usage: hc_swap.sh [-hV] <direction>
##  
##     Swap the currently selected window with the window in <direction>.
##     Valid directions are: left, right, up, down.
##  
## Based on a script by Caleb Everett, available at:
## https://github.com/everett1992/herbstluftwm/blob/master/swap
#
#  Script logic is fundamentally unchanged from everett1992's version.
#  All I've done is throw a bunch of junk in.

[ -x $HOME/.local/bin/cev_print.sh ] && . $HOME/.local/bin/cev_print.sh

self="${0##*'/'}"
dir=""

die_invalid_argument() {
    print_self error
    printf "%binvalid argument.%b\n" "$_norm" "$_clear" >&2
    exit 1
}

die_invalid_direction() {
    print_self error
    printf "%binvalid direction.%b\n" "$_norm" "$_clear" >&2
    exit 1
}

hc() { herbstclient "$@"; }
lock() { hc lock; }
unlock() { hc unlock; }

while getopts "hV?" option; do
    case $option in
        h) print_help && exit ;;
        V) print_version && exit ;;
        "?") print_help && exit ;;
    esac
    shift $((OPTIND - 1))
done

[ $# -lt 1 ] && die_invalid_argument

case $1 in
    "left" | "right" | "up" | "down") dir="$1" ;;
    *) die_invalid_direction ;;
esac

srcwinid=$(hc attr clients.focus.winid) # source window ID; "from"
hc focus $dir 2>/dev/null               # move to our destination window
if [ $? -ne 0 ]; then exit 1; fi        # abort if unable to focus in that dir.
dstwinid=$(hc attr clients.focus.winid) # destination window ID; "to"
swpexp="s/$srcwinid/TOKEN/g; s/$dstwinid/$srcwinid/g; s/TOKEN/$dstwinid/g"
hc load "$(hc dump | sed -e "$swpexp")" # alter the window layout.