Geany editor: Wrapper for per-workspace instances, opening in most recently focused window, and more

geanywl

#!/bin/bash

GEANY_PATH="/usr/bin/geany"

if [ -z "$XDG_RUNTIME_DIR" ]; then
	[ -z "$XDG_CACHE_HOME" ] &&
		XDG_CACHE_HOME="$HOME/.cache"

	XDG_RUNTIME_DIR="$XDG_CACHE_HOME"
fi

main() {
	OPTS=$(getopt -o hc:gPil:mnprstvV -l help,help-all,help-gtk,column:,config:,ft-names,generate-tags,no-preprocessing,new-instance,socket-file:,list-documents,line:,no-msgwin,no-ctags,no-plugins,print-prefix,read-only,no-session,no-terminal,vte-lib:,verbose,version,display: -n geanywl -- "$@")
	
	eval set -- "$OPTS"
	
	SKIP=
	NEW_INSTANCE=
	PARAMS=()
	
	# https://gist.github.com/cosimo/3760587
	while true; do
		ARG1="$1"
		ARG2=
		
		case "$1" in
			-h | --help | --help-all | --help-gtk) SKIP=true; shift ;;
			--column ) ARG2="$2"; shift 2 ;;
			-c | --config ) ARG2="$2"; shift 2 ;;
			--ft-names ) SKIP=true; shift ;;
			-g | --generates-tags ) SKIP=true; shift ;;
			-P | --no-preprocessing ) shift ;;
			-i | --new-instance ) NEW_INSTANCE=true; ARG1=""; shift ;;
			--socket-file ) SKIP=true; ARG2="$2"; shift 2 ;;
			--list-documents ) SKIP=true; shift ;;
			-l | --line ) ARG2="$2"; shift 2 ;;
			-m | --no-msgwin ) shift ;;
			-n | --no-ctags ) shift ;;
			-p | --no-plugins ) shift ;;
			--print-prefix ) SKIP=true; shift ;;
			-r | --read-only ) shift ;;
			-s | --no-session ) shift ;;
			-t | --no-terminal ) shift ;;
			--vte-lib ) ARG2="$2"; shift 2 ;;
			-v | --verbose ) shift ;;
			-V | --version ) SKIP=true; shift ;;
			--display ) ARG2="$2"; shift 2 ;;
			-- ) shift; break ;;
			* ) break ;;
		esac
		
		[ "$ARG1" ] && PARAMS+=("$ARG1")
		[ "$ARG2" ] && PARAMS+=("$ARG2")
	done
	
	FILES="$@"
	
	[ "$FILES" ] && PARAMS+=("$@")
	
	if [ "$SKIP" = true ]; then
		exec_geany
	fi
	
	if [ ! "$FILES" ]; then
		NEW_INSTANCE=true
	fi
	
	# If a new instance is not requested, look for existing instances
	if [ ! "$NEW_INSTANCE" = true ]; then
		
		# Check for instances in the current workspace, keep the pids
		# And iterate the resulting pids. This list may contain some
		#  false positives. The windows are also sorted according to
		#  which of them was focused more recently
		
		while read -r pid; do
			
			# Verify the process user is the same as the current one
			# Verify the pid corresponds to a process named 'geany'
			[ "$(ps -o uid="" $pid)" -ne "$UID" ] && continue
			[ $(ps -q $pid -o comm="") != "geany" ] && continue
			
			# Get listening unix domain sockets from the PID
			pinfo=$(ss -lpxH | grep "pid=$pid" | grep geany_socket)
			
			# If sockets were found, launch Geany
			if [ -n "$pinfo" ]; then
				socket=$(echo "$pinfo" | head -n 1 |
					grep -Po "$XDG_RUNTIME_DIR/geany/geany_socket\.[0-9a-fA-F]+")
				
				exec_geany "$socket"
			fi
		done < <(wmctrl -lp | grep '0x[0-9a-fA-F]\+ \+'$(wmctrl -d | grep '*' \
			| sed -r 's/([0-9]+).*/\1/g') | grep Geany \
			| sort_recently_focused \
			| sed -r 's/0x[0-9a-fA-F]+ +[0-9]+ +([0-9]+).*/\1/g')
	fi
	
	for (( i=0; ; i++ )); do
		socket="$HOME/.config/geany/geany_socket_${HOSTNAME}__$i"
		
		# Get UID of owner
		owner=$(stat -c "%u" "$socket" 2>/dev/null)
		
		# If the owner var is empty, the file does not exist
		if [ -z "$owner" ]; then
			exec_geany "$socket"
		fi
		
		# If the user does not own the file, we cannot examine it
		# If the -e check fails, while the stat  earlier succeeded,
		#  it means the the file is broken symbolic link
		if [[ "$owner" -eq "$UID" ]] && [ ! -e "$socket" ]; then
			exec_geany "$socket"
		fi
	done
}

exec_geany() {
	if [ "$1" ]; then
		exec "$GEANY_PATH" --socket-file "$1" "${PARAMS[@]}"
	else
		exec "$GEANY_PATH" "${PARAMS[@]}"
	fi
}

sort_recently_focused() {
	recent=$(xprop -root | grep "^_NET_CLIENT_LIST_STACKING" | tr "," " ")
	recent=(${recent##*#})
	
	wins=()
	ids=()
	
	while read -r line; do
		wins+=("$line")
		ids+=($(grep -o '0x[0-9a-fA-F]\+' <<< "$line"))
	done
	
	for (( i=${#recent[@]}-1 ; i>=0 ; i-- )); do
		for (( j=0; j<${#ids[@]}; j++ )); do
			if [ $((ids[j])) = $((recent[i])) ]; then
				echo "${wins[j]}"
			fi
		done
	done
}

main "$@"