extends SS2D_Action
class_name SS2D_ActionSetPivot

var _shape: SS2D_Shape

var _new_pos: Vector2
var _old_pos: Vector2


func _init(s: SS2D_Shape, pos: Vector2) -> void:
	_shape = s
	_new_pos = pos
	_old_pos = _shape.global_position


func get_name() -> String:
	return "Set Pivot"


func do() -> void:
	_set_pivot(_new_pos)


func undo() -> void:
	_set_pivot(_old_pos)


func _set_pivot(shape_position: Vector2) -> void:
	var shape_gt: Transform2D = _shape.get_global_transform()
	var pa := _shape.get_point_array()

	_shape.global_position = shape_position

	pa.begin_update()
	pa.disable_constraints()

	for i in pa.get_point_count():
		var key: int = pa.get_point_key_at_index(i)
		var point: Vector2 = pa.get_point_position(key)
		pa.set_point_position(key, _shape.to_local(shape_gt * point))

	pa.enable_constraints()
	pa.end_update()