gui

   1 #!/bin/bash
   2
   3 if [[ "$(type -t _gsu_setup)" != "function" ]]; then
   4         gsu_dir=${gsu_dir:-${BASH_SOURCE[0]%/*}}
   5         . $gsu_dir/common || exit 1
   6         _gsu_setup
   7 fi
   8
   9 export GSU_NODE_NAME_PATTERN='[a-zA-Z_]'
  10
  11 _get_geometry()
  12 {
  13         local x y
  14         result="$(stty size)"
  15         if (($? != 0)); then
  16                 gsu_msg "fatal: could not get terminal geometry"
  17                 exit 1
  18         fi
  19         x="${result#* }"
  20         y="${result%% *}"
  21         (($x > 190)) && x=190
  22         result="$y $x"
  23 }
  24
  25 gsu_inputbox()
  26 {
  27         local g text="$1" init="$2"
  28
  29         _get_geometry
  30         g="$result"
  31         result="$(dialog --inputbox "$text" $g "$init" 3>&1 1>&2 2>&3 3>&-)"
  32         ret="$?"
  33 }
  34
  35 gsu_textbox()
  36 {
  37         local file="$1"
  38
  39         _get_geometry
  40         dialog --textbox "$file" $result
  41 }
  42
  43 # dialog segfaults if message is too long. Hence we always use a temporary file
  44 gsu_msgbox()
  45 {
  46         local tmp="$(mktemp gsu_msgbox.XXXXXXXXXX)"
  47
  48         if (($? != 0)); then
  49                 dialog --msgbox "mktemp error" 0 0
  50                 return
  51         fi
  52         echo "$1" > "$tmp"
  53         gsu_textbox "$tmp"
  54         rm -f "$tmp"
  55 }
  56
  57 gsu_menu()
  58 {
  59         local header="${1:-root}"
  60         local items="$2"
  61         local i state opts num=0
  62
  63         _get_geometry
  64         opts="$result 16"
  65         for i in $items; do
  66                 let num++
  67                 opts+=" $i $num"
  68         done
  69         result="$(dialog --menu "$gsu_banner_txt ($header)" $opts 3>&1 1>&2 2>&3 3>&-)"
  70         ret="$?"
  71 }
  72
  73 _get_level()
  74 {
  75         local tmp="${1%%$GSU_NODE_NAME_PATTERN*}"
  76         result="${#tmp}"
  77 }
  78
  79 _get_subtree()
  80 {
  81         local tree="$1" root="${2%/}"
  82         local TAB='     '
  83
  84         first="$(grep -n "$TAB\{1,\}$root/" <<< "$tree")"
  85         [[ -z "$first" ]] && return
  86
  87         line_num="${first%%:*}"
  88         _get_level "${first#*:}"
  89         level="$result"
  90
  91         #echo "line: $line_num, root: $root, indent level: $level"
  92         result="$(sed -e "1,${line_num}d;" <<< "$tree" \
  93                 | sed -e "/^$TAB\{1,$level\}$GSU_NODE_NAME_PATTERN/,\$d" \
  94                 | sed -e "/^$TAB\{$(($level + 2))\}/d")"
  95         ret="$level"
  96 }
  97
  98 _get_root_nodes()
  99 {
 100         local tree="$1" TAB='   '
 101
 102         result="$(grep "^${TAB}${GSU_NODE_NAME_PATTERN}" <<< "$tree")"
 103 }
 104
 105 _browse()
 106 {
 107         local header="$1" old_header
 108         local tree="$2" subtree="$3"
 109
 110         while :; do
 111                 gsu_menu "$header" "$subtree"
 112                 (($ret != 0)) && return
 113                 [[ -z "$result" ]] && return
 114                 if [[ "${result%/}" != "$result" ]]; then
 115                         old_header="$header"
 116                         header="$result"
 117                         _get_subtree "$tree" "$header"
 118                         _browse "$header" "$tree" "$result"
 119                         header="$old_header"
 120                         continue
 121                 fi
 122                 eval ${gsu_name}_$result
 123         done
 124 }
 125
 126 gsu_gui()
 127 {
 128         local tree="$1" subtree
 129
 130         type -t dialog &> /dev/null
 131         if (($? != 0)); then
 132                 gsu_msg "dialog executable not found"
 133                 exit 1
 134         fi
 135         _get_root_nodes "$tree"
 136         subtree="$result"
 137         _browse "main menu" "$tree" "$subtree"
 138 }