feat(util): Add GraphViz helper types

Core/include/Acts/Utilities/GraphViz.hpp

@@ -0,0 +1,110 @@
+// This file is part of the Acts project.
+//
+// Copyright (C) 2024 CERN for the benefit of the Acts project
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#pragma once
+
+#include <ostream>
+#include <vector>
+
+namespace Acts::GraphViz {
+
+enum class Shape {
+  Box,
+  Polygon,
+  Ellipse,
+  Oval,
+  Circle,
+  Point,
+  Egg,
+  Triangle,
+  Plaintext,
+  Plain,
+  Diamond,
+  Trapezium,
+  Parallelogram,
+  House,
+  Pentagon,
+  Hexagon,
+  Septagon,
+  Octagon,
+  DoubleCircle,
+  DoubleOctagon,
+  TripleOctagon,
+  InvTriangle,
+  InvTrapezium,
+  InvHouse,
+  Mdiamond,
+  Msquare,
+  Mcircle,
+  Rect,
+  Rectangle,
+  Square,
+  Star,
+  None,
+  Underline,
+  Cylinder,
+  Note,
+  Tab,
+  Folder,
+  Box3d,
+  Component,
+  Promoter,
+  Cds,
+  Terminator,
+  Utr,
+  PrimerSite,
+  RestrictionSite,
+  FivePOverhang,
+  ThreePOverhang,
+  NOverhang,
+  Assembly,
+  Signature,
+  Insulator,
+  Ribosite,
+  RNAStab,
+  ProteaseSite,
+  ProteinStab,
+  RPromoter,
+  RArrow,
+  LArrow,
+  LPromoter
+};
+
+std::ostream& operator<<(std::ostream& os, const Shape& shape);
+
+enum class Style {
+  Filled,
+  Invisible,
+  Diagonals,
+  Rounded,
+  Dashed,
+  Dotted,
+  Solid,
+  Bold
+};
+
+std::ostream& operator<<(std::ostream& os, const Style& style);
+
+struct Node {
+  std::string id;
+  std::string label;
+  Shape shape = Shape::Ellipse;
+  std::vector<Style> style = {Style::Solid};
+};
+
+std::ostream& operator<<(std::ostream& os, const Node& node);
+
+struct Edge {
+  Node from;
+  Node to;
+  Style style = Style::Solid;
+};
+
+std::ostream& operator<<(std::ostream& os, const Edge& node);
+
+}  // namespace Acts::GraphViz

Core/src/Utilities/CMakeLists.txt

@@ -8,4 +8,5 @@ target_sources(
         TrackHelpers.cpp
         BinningType.cpp
         Intersection.cpp
+        GraphViz.cpp
 )