#if TOOLS
[Tool]
public partial class TerrainEditingPlugin
	: EditorPlugin
{
	const string ScenePath = "res://addons/terrain-editing/TerrainEditingControls.tscn";
	// The container to which the editing controls get added to when Terrain is selected.
	const CustomControlContainer Container = CustomControlContainer.SpatialEditorSideRight;


	TerrainEditingControls _controls;

	public override bool _Handles(GodotObject obj)
		=> obj is Terrain;

	public override void _EnterTree()
	{
		var scene = GD.Load<PackedScene>(ScenePath);
		_controls = scene.Instantiate<TerrainEditingControls>();
	}

	public override void _ExitTree()
	{
		if (_controls == null) return;
		if (_controls.GetParent() != null)
			RemoveControlFromContainer(Container, _controls);
		_controls.Free();
		_controls = null;
	}

	public override void _MakeVisible(bool visible)
	{
		if (visible)
			AddControlToContainer(Container, _controls);
		else if (_controls.GetParent() != null)
			RemoveControlFromContainer(Container, _controls);
	}
}
#endif