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#!/usr/bin/env sh
# -*- mode: scheme; -*-
IFS=" "
exec scsh -s "$0" "$@"
!#
;; hlwm-run-or-raise --- Raise a window or start a new process
;; Copyright (C) 2022 Tom Willemse
;; This program is free software: you can redistribute it and/or modify it under
;; the terms of the GNU General Public License as published by the Free Software
;; Foundation, either version 3 of the License, or (at your option) any later
;; version.
;; This program is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
;; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
;; details.
;; You should have received a copy of the GNU General Public License along with
;; this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Tries to find a window ID for a window with a given class value. If
;; no such window can be found treat the rest of the command line as
;; the command to start.
;; This script depends on both herbstluftwm and wmctrl.
(define (get-current-window-id)
(let* ((output (run/string (wmctrl -v -a ":ACTIVE:") (= 2 1)))
(re (rx "Using window: "
(submatch "0x" (+ hex-digit))
"\n"))
(match (regexp-search re output)))
(and match (match:substring match 1))))
(define (pull-element-to-front elt collection)
(if (string= (car collection) elt)
collection
(pull-element-to-front elt (rotate collection))))
(define (rotate lst)
(append (cdr lst) (list (car lst))))
(define current-window-id
(get-current-window-id))
(define window-ids
(run/strings
(pipe (wmctrl -lx)
(awk "{ print $1, $3 }")
(grep ,(string-append "\\." (car command-line-arguments)))
(awk "{ print $1 }"))))
(if (not (null? window-ids))
(let ((next-window
(if (and (> (length window-ids) 1)
(member current-window-id window-ids))
(cadr (pull-element-to-front current-window-id window-ids))
(car window-ids))))
(run (hlwm-switch-to-window ,next-window)))
(exec-epf (,@(cdr command-line-arguments))))
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