Try to get primary output name

ecran

@@ -13,7 +13,8 @@ readonly RESET='\033[0m'
 readonly COLOR_DEBUG="${PURPLE}"
 
 ## First and main screen (laptop screen,…)
-readonly MAIN_OUTPUT_NAME="LVDS-1"
+## It can be forced here or the script will try to discover it's name
+#readonly MAIN_OUTPUT_NAME="LVDS-1"
 
 # }}}
 
@@ -29,6 +30,16 @@ debug_message() {                                               # {{{
 # }}}
 define_vars() {                                                 # {{{
 
+	## Primary output {{{
+	### If the primary output wasn't manually defined,
+	### try to get it's name
+	if [ -z "${MAIN_OUTPUT_NAME}" ]; then
+		get_primary_output_name
+	fi
+	debug_message "define_vars − \
+The primary output is: ${MAIN_OUTPUT_NAME}."
+	## }}}
+
 	return_second_output_name="0"
 
 	SECOND_OUTPUT_NAME=$(xrandr | grep " connected" | grep -v "${MAIN_OUTPUT_NAME}" | awk 'NR==1{ print $1 }')
@@ -39,6 +50,20 @@ The second connected output is: ${SECOND_OUTPUT_NAME}."
 	return "${return_second_output_name}"
 }
 # }}}
+get_primary_output_name() {                                     # {{{
+
+	## First, check if an output is already defined as primary
+	local_primary_output_name=$(xrandr | grep " primary" | awk 'NR==1{ print $1 }')
+
+	## If the var contains something
+	if [ -n "${local_primary_output_name}" ]; then
+		debug_message "get_primary_output_name − \
+An output is defined as primary: ${local_primary_output_name}".
+	fi
+
+	readonly MAIN_OUTPUT_NAME="${local_primary_output_name}"
+}
+# }}}
 is_proc_running() {                                             # {{{
 
 	local_proc_pattern="${1}"