A script to add launchers to Xfce panel

xfce-add-launcher.sh

#!/usr/bin/env bash

# NOTE: Xfce panel position scheme -------------------------------------------

# (6)--(11)---(9)--(11)--(2)
#  |                      |
# (5)                    (1)
#  |                      |
# (7)         (0)        (3)
#  |                      |
# (5)                    (1)
#  |                      |
# (8)--(12)--(10)--(12)--(4)

# l10n -------------------------------------------------------------------------

# Text relative to each position number (0-12)...
anchor[0]="fora das bordas"
anchor[1]="borda direita"
anchor[2]="ancorado acima à direita"
anchor[3]="ancorado no meio à direita"
anchor[4]="ancorado abaixo à direita"
anchor[5]="borda esquerda"
anchor[6]="ancorado acima à esquerda"
anchor[7]="ancorado no meio à esquerda"
anchor[8]="ancorado abaixo à esquerda"
anchor[9]="ancorado no centro acima"
anchor[10]="ancorado no centro abaixo"
anchor[11]="borda superior"
anchor[12]="borda inferior"

# General l10n...
l10n_file_word="Arquivo"
l10n_path_word="Caminho"
l10n_contents_word="Conteúdo"
l10n_panel_word="Painel"
l10n_choose_panel="Escolha um painel"
l10n_single_panel="O lançador será inserido no painel"
l10n_no_panel="
Não existem painéis na sua área de trabalho!
Crie ao menos um painel e tente novamente.

Saindo...
"
l10n_set_desktop_file="
Agora vamos criar um novo lançador.
Os campos marcados com (*) são obrigatórios!
"
l10n_launcher_name="Nome do lançador (*): "
l10n_launcher_comment="Descrição: "
l10n_launcher_exec="Comando a ser executado (*): "
l10n_launcher_icon="Caminho ou nome do ícone (*): "
l10n_launcher_path="Caminho de execução: "
l10n_launcher_terminal="Executar no terminal (true/false): "
l10n_launcher_startup="Notificação de lançamento (true/false): "

# Functions --------------------------------------------------------------------

# xfconf-query default command...
xfconf-panel() {
	command xfconf-query -c xfce4-panel -p /panels"$@"
}

# Print string whitout leading and trailing spaces...
trim() {
	local str="$@"
	shopt -s extglob
	str="${str##*( )}"
	str="${str%%*( )}"
	shopt -u extglob
	echo "$str"
}

# Read required entries...
read_required() {
	while [[ -z $var ]]; do
		read -p "$1" var
		var=$(trim "$var")
	done
	echo "$var"
}

# Expand user home dir in path...
expand_home() {
	local path="$@"
	path=${path/\$HOME/$HOME}
	path=${path/\~/$HOME}
	echo "$path"
}

text_to_slug() {
	echo "${@,,}" | tr -d '[:punct:]'    \
			  | sed -e "s/ /-/g"    \
			  	  -e "s/[áàãâä]/a/g" \
			  	  -e "s/[éêä]/e/g"   \
			  	  -e "s/[íÍï]/i/g"   \
			  	  -e "s/[óõôö]/o/g"  \
			  	  -e "s/[úü]/u/g"    \
			  	  -e "s/[ç]/c/g"
}

# Existent panels menu (sets var 'panel_id')...
panels_menu() {
	echo ""
	for p in ${panels[@]}; do
		echo "$p) $l10n_panel_word $p (${anchor[${positions[$p]}]})"
	done
	echo ""
	read -p "$l10n_choose_panel (Default: ${panels[0]}): " panel_id
	[[ ! " ${panels[@]} " =~ " $panel_id " ]] && panel_id=${panels[0]}
}

# Get the single existent panel ID (sets var 'panel_id')...
single_panel() {
	echo -e "\n$l10n_single_panel ${panels[0]}.\n"
	panel_id=${panels[0]}
}

# Exit with status 1 if there's no panel...
no_panel() {
	echo "$l10n_no_panel"
	exit 1
}

# New desktop file contents (sets var 'desktop_file_contents')...
set_desktop_file() {
	# Header message...
	echo "$l10n_set_desktop_file"
	# Required...
	lname=$(read_required "$l10n_launcher_name")
	# Optional, default is empty...
	read -p "$l10n_launcher_comment" lcomment
	lcomment=$(trim "$lcomment")
	# Required...
	lexec=$(read_required "$l10n_launcher_exec")
	# Required...
	licon=$(read_required "$l10n_launcher_icon")
	# Optional, default is empty...
	read -p "$l10n_launcher_path" lpath
	lpath=$(trim "$lpath")
	# Optional, default is false...
	read -p "$l10n_launcher_terminal" lterminal
	lterminal=$(trim "$lterminal")
	# Optional, default is false...
	read -p "$l10n_launcher_startup" lstartup
	lstartup=$(trim "$lstartup")
	echo ""
	
	desktop_file_contents="\
[Desktop Entry]
Version=1.0
Type=Application
Name=$lname
Comment=$lcomment
Exec=$(expand_home $lexec)
Icon=$(expand_home $licon)
Path=$(expand_home $lpath)
Terminal=${lterminal:-false}
StartupNotify=${lstartup:-false}"

	desktop_file_name="$(text_to_slug "$lname").desktop"
	desktop_file_path="$HOME/.config/xfce4/panel/launcher-$next_plugin"

	echo "\
$l10n_file_word: $desktop_file_name
$l10n_path_word: $desktop_file_path

$desktop_file_contents

"
}

# Panels and plugins info ------------------------------------------------------

# panels        - array with panels IDs
# positions     - array with panel (index) positions
# panel_plugins - array with pluign IDs for each panel (index)
# plugin_ids    - array with all current plugin IDs
# next_plugin   - next plugin ID available

# Existing panel IDs...
panels=($(xfconf-panel | sed 1,2d))

# Plugin IDs...
for p in ${panels[@]}; do
	# Get positions...
	positions[$p]=$(xfconf-panel "/panel-$p/position" | sed -n "s/p=\([^;]*\);.*/\1/p")
	# Get plugin IDs by panel...
	panel_plugins[$p]=$(xfconf-panel "/panel-$p/plugin-ids" 2> /dev/null | sed 1,2d)
	# Get all current plugins IDs...
	plugin_ids+=(${panel_plugins[$p]})
done

# Get next plugin ID available...
IFS=$'\n'
sorted=($(sort -n <<< "${plugin_ids[*]}"))
unset IFS
next_plugin=$((${sorted[@]: -1} + 1))

# Main procedures --------------------------------------------------------------

# Message or menu to display based on number of panels to get var 'panel_id'...

if [[ ${#panels[@]} -eq 1 ]]; then
	single_panel
elif [[ ${#panels[@]} -gt 1 ]]; then
	panels_menu
else 
	no_panel
fi

# Build the new launcher...

set_desktop_file

read -s -N 1 -p "Confirma a criação do arquivo acima (S/n)? " opt

if [[ ${opt,,} = "n" ]]; then
	echo -e "\n\nSaindo...\n"
	exit 0
else

	# Create new launcher folder...
	mkdir -p "$desktop_file_path"
	# Create new launcher file...
	echo "$desktop_file_contents" > "$desktop_file_path/$desktop_file_name"
	# Add new launcher to xfconf plugins entry...
	xfconf-panel -c xfce4-panel -p /plugins/plugin-${next_plugin} -t string -s "launcher" --create
	# Add new desktop file to new plugin entry...
	xfconf-query -c xfce4-panel -p /plugins/plugin-${next_plugin}/items -t string -s "${desktop_file_name}" -a --create
	# Clear plugin IDs from selected panel...
	xfconf-query -c xfce4-panel -p /panels/panel-${panel_id}/plugin-ids -rR
	# Recreate plugin IDs array for selected panel...
	id_list=""
	if [[ ${#panel_plugins[$panel_id]} -ne 0 ]]; then
		for id in ${panel_plugins[$panel_id]}; do
			id_list+="-t int -s $id "
		done
	fi
	id_list+="-t int -s $next_plugin" 
	xfconf-query -c xfce4-panel -p /panels/panel-$panel_id/plugin-ids -n $id_list -a
	# Restart panels...
	xfce4-panel -r
fi

echo -e "\nSaindo...\n"
exit 0