feat: reload metsys editor maps by selecting game scene

Attaches MetSys' main database node to the MetSysPlugin, and references
the plugin from the autoload. This lets us call
MetSys.plugin.main.force_reload() when switching metsys game contexts.

Now reloading the metsys view just by selecting the main game scene!

addons/MetroidvaniaSystem/MetSysPlugin.gd

@@ -64,6 +64,9 @@ func _enter_tree() -> void:
 
 	get_singleton().settings.theme_changed.connect(func(): prev_theme_state.clear())
 
+	# DINO addition - support calling plugin.main functions in @tool scripts!
+	get_singleton().plugin = self
+
 func _exit_tree() -> void:
 	main.queue_free()
 

addons/MetroidvaniaSystem/Scripts/MetroidvaniaSystem.gd

@@ -24,6 +24,8 @@ enum { R, ## Right border.
 		U, ## Top border.
 	}
 
+var plugin
+
 var settings: MetSysSettings
 ## The size of a map cell. Automatically set to the size of [member MapTheme.center_texture]. Read only.
 var CELL_SIZE: Vector2

src/dino/modes/vania/Vania.gd

@@ -3,18 +3,39 @@ class_name Vania
 
 ## static #############################################
 
-## NOTE this doesn't completely work yet!
-static func reset_metsys_context(metsys_settings):
-	Log.info("resetting MetSys context")
+static func reset_metsys_context(game, metsys_settings):
+	# only run if the settings actually change
+	if MetSys.settings == metsys_settings:
+		Log.info("skipping MetSys reset, in same context", game)
+		return
+	Log.info("resetting MetSys context", game)
 	MetSys.settings = metsys_settings
 
 	# this is typically already connected
 	U._connect(MetSys.settings.theme_changed, MetSys._update_theme)
 	MetSys._update_theme()
 
-	var MapData = load("res://addons/MetroidvaniaSystem/Scripts/MapData.gd")
-	MetSys.map_data = MapData.new()
-	MetSys.map_data.load_data()
+	if Engine.is_editor_hint() and MetSys.plugin != null:
+		var db_main = MetSys.plugin.main
+		if db_main:
+			# calls Database/Main.tscn.reload_map()
+			db_main.reload_map()
+		else:
+			Log.warn("Metsys/Database/Main node not found, could not reset metsys context", db_main)
+	else:
+		# non-editor map data reload
+		# TODO be sure the minimap updates as expected
+
+		# this bit from Database/Manage.tscn.force_reload()
+		MetSys.map_data = MetSys.MapData.new()
+		MetSys.map_data.load_data()
+		for group in MetSys.map_data.cell_groups.values():
+			var i: int = 0
+			while i < group.size():
+				if MetSys.map_data.get_cell_at(group[i]):
+					i += 1
+				else:
+					group.remove_at(i)
 
 ## vars ##################################################3
 

src/dino/vania/VaniaGame.gd

@@ -82,10 +82,7 @@ func all_rooms_visited():
 ## enter_tree #######################################################
 
 func _enter_tree():
-	# if Engine.is_editor_hint():
-	# 	return
-
-	Vania.reset_metsys_context(vania_metsys_settings)
+	Vania.reset_metsys_context(self, vania_metsys_settings)
 
 ## exit_tree #######################################################
 

src/games/hatbot/HatBotGame.gd

@@ -9,10 +9,7 @@ class_name HatBotGame
 @export var player_entity: DinoPlayerEntity
 
 func _enter_tree():
-	# if Engine.is_editor_hint():
-	# 	return
-
-	Vania.reset_metsys_context(hatbot_metsys_settings)
+	Vania.reset_metsys_context(self, hatbot_metsys_settings)
 
 func _exit_tree():
 	for m in modules:

src/games/shirt/ShirtGame.gd

@@ -9,10 +9,7 @@ class_name ShirtGame
 @export var player_entity: DinoPlayerEntity
 
 func _enter_tree():
-	# if Engine.is_editor_hint():
-	# 	return
-
-	Vania.reset_metsys_context(shirt_metsys_settings)
+	Vania.reset_metsys_context(self, shirt_metsys_settings)
 
 func _exit_tree():
 	for m in modules: