feat: Several fixes and optimizations

This fixes another error message of godot-escoria/escoria-issues#64
This optimizes how UI and dialog managers register themselves with Escoria
This fixes another "character is at position, but action still isn't carried out"
This fixes click bubbling down to multiple items triggering different actions
This removes the "tooltip follows focus" setting because it solemly was a simplemouse feature
This optimizes the registering of settings

addons/escoria-core/game/core-scripts/esc_animation_player.gd

@@ -91,9 +91,9 @@ func stop():
 # - name: The animation name to play
 # - backwards: Play backwards
 func play(name: String, backwards: bool = false):
-	if _is_animation_player:
+	if _is_animation_player and _animation_player.current_animation != "":
 		_animation_player.seek(0)
-	else:
+	elif not _is_animation_player:
 		_animated_sprite.frame = 0
 	_current_animation = name
 	if backwards and _is_animation_player:

addons/escoria-core/game/core-scripts/esc_controller.gd

@@ -127,7 +127,7 @@ func perform_inputevent_on_object(
 		var player_global_pos = escoria.main.current_scene.player.global_position
 		var clicked_position = event.position
 
-		if not player_global_pos == destination_position:
+		if not player_global_pos.is_equal_approx(destination_position):
 			dont_interact = true
 
 	# If no interaction should happen after player has arrived, leave 

addons/escoria-core/game/core-scripts/esc_game.gd

@@ -256,34 +256,6 @@ func show_ui():
 	pass
 
 
-# Function is called if Project setting escoria/ui/tooltip_follows_mouse = true
-#
-# #### Parameters
-#
-# - p_position: Position of the mouse
-func update_tooltip_following_mouse_position(p_position: Vector2):
-	var corrected_position = p_position
-
-	# clamp TOP
-	if tooltip_node.tooltip_distance_to_edge_top(p_position) <= mouse_tooltip_margin:
-		corrected_position.y = mouse_tooltip_margin
-
-	# clamp BOTTOM
-	if tooltip_node.tooltip_distance_to_edge_bottom(p_position + tooltip_node.rect_size) <= mouse_tooltip_margin:
-		corrected_position.y = escoria.game_size.y - mouse_tooltip_margin - tooltip_node.rect_size.y
-
-	# clamp LEFT
-	if tooltip_node.tooltip_distance_to_edge_left(p_position - tooltip_node.rect_size/2) <= mouse_tooltip_margin:
-		corrected_position.x = mouse_tooltip_margin
-
-	# clamp RIGHT
-	if tooltip_node.tooltip_distance_to_edge_right(p_position + tooltip_node.rect_size/2) <= mouse_tooltip_margin:
-		corrected_position.x = escoria.game_size.x - mouse_tooltip_margin - tooltip_node.rect_size.x
-
-	tooltip_node.anchor_right = 0.2
-	tooltip_node.rect_position = corrected_position + tooltip_node.offset_from_cursor
-
-
 # Set the Editor debug mode
 func _set_editor_debug_mode(p_editor_debug_mode: int) -> void:
 	editor_debug_mode = p_editor_debug_mode

addons/escoria-core/game/core-scripts/esc_item.gd

@@ -299,10 +299,13 @@ func _unhandled_input(event: InputEvent) -> void:
 		if mouse_in_shape:
 			if event.doubleclick and event.button_index == BUTTON_LEFT:
 				emit_signal("mouse_double_left_clicked_item", self, event)
+				get_tree().set_input_as_handled()
 			elif event.button_index == BUTTON_LEFT:
 				emit_signal("mouse_left_clicked_item", self, event)
+				get_tree().set_input_as_handled()
 			elif event.button_index == BUTTON_RIGHT:
 				emit_signal("mouse_right_clicked_item", self, event)
+				get_tree().set_input_as_handled()
 
 
 # Return the animation player node

addons/escoria-core/game/escoria.gd

@@ -1,4 +1,5 @@
 # The escoria main script
+tool
 extends Node
 
 # Signal sent when pause menu has to be displayed
@@ -310,12 +311,6 @@ func _input(event):
 	if event.is_action_pressed("ui_cancel"):
 		emit_signal("request_pause_menu")
 
-	if ProjectSettings.get_setting("escoria/ui/tooltip_follows_mouse"):
-		if escoria.main.current_scene and escoria.main.current_scene.game:
-			if event is InputEventMouseMotion:
-				escoria.main.current_scene.game. \
-					update_tooltip_following_mouse_position(event.position)
-
 
 # Pauses or unpause the game
 #
@@ -349,6 +344,110 @@ func run_event_from_script(script: ESCScript, event_name: String):
 			[]
 		)
 		return
+
+
+# Register a new project setting if it hasn't been defined already
+#
+# #### Parameters
+#
+# - name: Name of the project setting
+# - default: Default value
+# - info: Property info for the setting
+func register_setting(name: String, default, info: Dictionary):
+	if not ProjectSettings.has_setting(name):
+		ProjectSettings.set_setting(
+			name,
+			default
+		)
+		info.name = name
+		ProjectSettings.add_property_info(info)
+
+
+# Register a user interface. This should be called in a deferred way
+# from the addon's _enter_tree.
+#
+# #### Parameters
+# - game_scene: Path to the game scene extending ESCGame
+func register_ui(game_scene: String):
+	if not ProjectSettings.get_setting("escoria/ui/game_scene") in [
+		"",
+		game_scene
+	]:
+		logger.report_errors(
+			"escoria.gd:register_ui()",
+			[
+				"Can't register user interface because %s is registered" % \
+						ProjectSettings.get_setting("escoria/ui/game_scene")
+			]
+		)
+	ProjectSettings.set_setting(
+		"escoria/ui/game_scene",
+		game_scene
+	)
+
+
+# Deregister a user interface
+#
+# #### Parameters
+# - game_scene: Path to the game scene extending ESCGame
+func deregister_ui(game_scene: String):
+	if ProjectSettings.get_setting("escoria/ui/game_scene") != game_scene:
+		logger.report_errors(
+			"escoria.gd:deregister_ui()",
+			[
+				(
+					"Can't deregister user interface %s because it " +
+					"is not registered."
+				) % ProjectSettings.get_setting("escoria/ui/game_scene")
+			]
+		)
+	ProjectSettings.set_setting(
+		"escoria/ui/game_scene",
+		""
+	)
+
+
+# Register a dialog manager addon. This should be called in a deferred way
+# from the addon's _enter_tree.
+#
+# #### Parameters
+# - manager_class: Path to the manager class script
+func register_dialog_manager(manager_class: String):
+	var dialog_managers: Array = ProjectSettings.get_setting(
+		"escoria/ui/dialog_managers"
+	)
+	if manager_class in dialog_managers:
+		return
+	dialog_managers.push_back(manager_class)
+	ProjectSettings.set_setting(
+		"escoria/ui/dialog_managers",
+		dialog_managers
+	)
+
+
+# Deregister a dialog manager addon
+#
+# #### Parameters
+# - manager_class: Path to the manager class script
+func deregister_dialog_manager(manager_class: String):
+	var dialog_managers: Array = ProjectSettings.get_setting(
+		"escoria/ui/dialog_managers"
+	)
+	if not manager_class in dialog_managers:
+		logger.report_warnings(
+			"escoria.gd:deregister_dialog_manager()",
+			[
+				"Dialog manager %s is not registered" % manager_class
+			]
+		)
+		return
+
+	dialog_managers.erase(manager_class)
+
+	ProjectSettings.set_setting(
+		"escoria/ui/dialog_managers",
+		dialog_managers
+	)
 
 
 # Function called to quit the game.