src/jexer/examples/imgls

   1 #!/bin/bash
   2
   3 # This is a modified version of the 'imgls' from iTerm2 located at
   4 # https://iterm2.com/utilities/imgls, modified to emit images with the
   5 # Jexer image protocol.
   6
   7 # tmux requires unrecognized OSC sequences to be wrapped with DCS tmux;
   8 # <sequence> ST, and for all ESCs in <sequence> to be replaced with ESC ESC. It
   9 # only accepts ESC backslash for ST.
  10 function print_osc() {
  11     if [ x"$TERM" = "xscreen" ] ; then
  12         printf "\033Ptmux;\033\033]"
  13     else
  14         printf "\033]"
  15     fi
  16 }
  17
  18 function check_dependency() {
  19   if ! (builtin command -V "$1" > /dev/null 2>& 1); then
  20     echo "imgcat: missing dependency: can't find $1" 1>& 2
  21     exit 1
  22   fi
  23 }
  24
  25 # More of the tmux workaround described above.
  26 function print_st() {
  27     if [ x"$TERM" = "xscreen" ] ; then
  28         printf "\a\033\\"
  29     else
  30         printf "\a"
  31     fi
  32 }
  33
  34 function list_file() {
  35   fn=$1
  36   test -f "$fn" || return 0
  37
  38   if [ "${fn: -4}" == ".png" ]; then
  39       print_osc
  40       printf '444;1;1;'
  41       base64 < "$fn"
  42       print_st
  43   elif [ "${fn: -4}" == ".jpg" ]; then
  44       print_osc
  45       printf '444;2;1;'
  46       base64 < "$fn"
  47       print_st
  48   fi
  49 }
  50
  51 check_dependency base64
  52
  53 if [ $# -eq 0 ]; then
  54   for fn in *
  55   do
  56      list_file "$fn"
  57   done < <(ls -ls)
  58 else
  59   for fn in "$@"
  60   do
  61      list_file "$fn"
  62   done
  63 fi
  64