mxfb-edit

#!/bin/bash

# mx-edit : helper script to open user's "mime-default" text-editor
#           fallback to featherpad, geany, nano, mcedit, vim, sensible-editor
#           open terminal if needed
#
# author: fehlix at mxlinux dot org
# version: 
VERSION="2021-08-04.01"

# need bash
if [ -z "$BASH_VERSION" ]; then
    exec /bin/bash "$0" "$@"
fi

ME=$(readlink -e $0)
ME=${ME##*/}
usage() { cat<<USAGE
$ME     -  helper script to open users "mime-default" text-editor

Usage:  $ME [options] [ text-file(s) ... ]

Options:
    
        -e EDITOR   set text-edit EDITOR to use
        
        -d          debug - print debug messages

        -h          help - show this help
        
        -r          edit as root
        
        -s          simulate - print commandline
        
        -v          version - show version

        -V          verbose - show what is done
        
        --          pass options followed to text editor
        
USAGE
}

OPTSTRING=":e:dhrsvV"
while getopts $OPTSTRING arg; do
  case $arg in
    e) # set editor to use
      USE_EDITOR="$OPTARG"
      ;;
    d) # debug on
      DEBUG=1
      echo "DEBUG=on"
      ;;
    r) # edit as root
      EDIT_AS_ROOT=1
      ;;
    s) # simulate on
      SIMULATE=1
      echo "SIMULATE=on"
      ;;
    h) # help.
      usage
      exit 
      ;;
    V) # verbose on
      VERBOSE=1
      echo "VERBOSE=on"
      ;;
    v) # version
      echo "version $VERSION"
      exit 0
      ;;
   \?) # invalid option
      echo "invalid option: -$OPTARG"
      exit 1
      ;;
    :) # missing argument
      echo "option -$OPTARG : missing argument"
      exit 1
      ;;
  esac
done
((DEBUG)) && echo shift $((OPTIND -1))
shift $((OPTIND -1))
((DEBUG)) && echo '$@: '"$@"
FALLBACK=(
    featherpad
    geany
    mousepad
    nano
    mcedit
    vim
    sensible-editor
    )

[ -n "$USE_EDITOR" ] && E="$USE_EDITOR" || E=""

# avoid self-calling loop
[ -n "$E" ] && {
    read -r c d <<<"$E"

    if [[ ${c##*/} == $ME ]]; then
        echo "ignored editor: $ME" 
        unset E 
    elif ! which "$c" >/dev/null; then
        echo "ignored not found editor: '$c'"
        unset E 
    fi 
}


# check mime-default text editor 
r=""
#((EUID)) || r="runuser -u $(logname)"
M=$($r xdg-mime query default text/plain)

[ -z "$E" ] &&  [ -n "$M" ] &&  { 
    ((VERBOSE)) && echo "MIME_DEFAULT_TEXT_EDITOR:$M"
    # set defaults
    : ${XDG_DATA_DIRS:=/usr/local/share:/usr/share}
    #XDD="$HOME/.local/share:$XDG_DATA_DIRS"
    XDD="$(eval printf ~$(/usr/bin/logname))/.local/share:$XDG_DATA_DIRS"
    readarray  -t  xdd  <<<"${XDD//://applications$'\n'}/applications"
    ((DEBUG)) && declare -p xdd
    # get first found with nullgob 
    read -r e _<<<$(shopt -s nullglob; echo ${xdd[@]/%//${M%.desktop}[.]desktop}; shopt -u nullglob)
    grep -sq '^Terminal=true' "$e" && terminal="x-terminal-emulator -e" || terminal=
    # get and tidy up first found Exec line 
    [ -n "$e" ] && E=$(grep -m1 -oP '^Exec[[:space:]]*=[[:space:]]*\K.*' "$e" | 
                       sed -e 's:@::g; s:[[:space:]]%[a-zA-Z]::; s:"::g' -e "s:'::g")
    
    # check found editor is available
    read -r c d <<<"$E"
    [ -n "$E" ] &&  which "$c" >/dev/null || unset E 
    
}

# fallback 
[ -z "$E" ] && \
for e in  ${FALLBACK[@]}; do
    E=$(which "$e" 2>/dev/null) && break
done

read -r c d <<<"$E"
[ -n "$E" ] &&  which "$c" >/dev/null || exit

case ${c##*/} in
    nano|pico|vi|vim*|mcedit|sensible-editor) 
		terminal="x-terminal-emulator -e"
		;;
     *) : terminal="" ;;
esac
# have a terminal
tty >/dev/null && terminal=""
run="$terminal"
((EDIT_AS_ROOT)) && run="mx-pkexec $terminal"    
##launch editor
((VERBOSE )) && echo $run "$E" "${@@Q}" 
((SIMULATE)) && echo $run $E "$@" && exit
$run $E "$@"

exit