1. #!/bin/bash
2. # vim: set fileencoding=utf-8 ts=4 sts=4 sw=4 tw=80 expandtab :
3.  
4. # Copyright (C) 2012 Florian Bruhin <me@the-compiler.org>
5.  
6. # tagswitch is free software: you can redistribute it and/or modify
7. # it under the terms of the GNU General Public License as published by
8. # the Free Software Foundation, either version 3 of the License, or
9. # (at your option) any later version.
10. #
11. # tagswitch is distributed in the hope that it will be useful,
12. # but WITHOUT ANY WARRANTY; without even the implied warranty of
13. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14. # GNU General Public License for more details.
15. #
16. # You should have received a copy of the GNU General Public License
17. # along with tagswitch  If not, see <http://www.gnu.org/licenses/>.
18.  
19. # Changes herbstluftwm tags
20.  
21. checkuse() {
22.     if [[ "${tags[$1]}" != [.!]* ]]; then # tag is not unused
23.         herbstclient use "${tags[$1]:1}" # cutting off first char (.#:!)
24.         exit 0
25.     fi
26. }
27.  
28. tags=( $(herbstclient tag_status) )
29.  
30. # Find the currently active tag
31. for ((i=0; i<="${#tags[@]}"; i++)); do
32.     [[ "${tags[i]}" == "#"* ]] && activetag="$i"
33. done
34.  
35. if [[ "$1" == next ]]; then # next active tag
36.     for ((i="$((activetag+1))"; i<"${#tags[@]}"; i++)); do
37.         checkuse "$i"
38.     done
39.     # at the end of the taglist, wrap around
40.     for ((i=0; i<"$activetag"; i++)); do
41.         checkuse "$i"
42.     done
43. elif [[ "$1" == prev ]]; then # previous active tag
44.     for ((i="$((activetag-1))"; i>=0; i--)) do
45.         checkuse "$i"
46.     done
47.     # at the beginning of the taglist, wrap around
48.     for ((i=${#tags[@]}-1; i>$((activetag-1)); i--)) do
49.         checkuse "$i"
50.     done
51. else
52.     echo "Usage: $0 [next|prev]"
53.     exit 1
54. fi
55.