feat(editor): the SRK tool measures the station tracks: the construction length and the useful one each way, as the rozporządzenie on the railway structures (Dz.U. 2026 poz. 1225) § 2 defines it, from the signal the trains stop by back to the joint, the fouling point or the level crossing behind them, between those where no signal stands; the switches within a track part it into stretches. A list in the panel with the longest train, the two ways marked where they differ, the track under the mouse or selected drawn in the schematic and the scenery, the list copied as a table

editor/editorStation.hpp

@@ -9,6 +9,7 @@ http://mozilla.org/MPL/2.0/.
 
 #pragma once
 
+#include <array>
 #include <functional>
 #include <optional>
 #include <string>
@@ -186,4 +187,43 @@ double distance_on(line const &Line, glm::dvec3 const &Point, double &Gap);
 // signal odd on track 1, even on track 2: 241, 242; Rising: its trains run towards the higher km
 std::string block_number(double const Km, int const Track, bool const Rising);
 
+// a limit of the part of a station track a train stands on
+struct limit
+{
+	enum class kind
+	{
+		signal,
+		joint, // of the track circuits
+		fouling, // the fouling point of a switch
+		start, // of a switch
+		buffer, // the end of the tracks, where the buffer stop stands
+		crossing // the edge of a road crossing the track on its level
+	};
+	kind what{kind::joint};
+	std::string name; // of the signal, of the switch for the others
+	double along{0.0}; // along the track, from its end at the lower chainage
+	glm::dvec3 point{0.0};
+};
+// the part of a station track the trains running one way stand on
+struct stand
+{
+	limit head; // the trains stop by it
+	limit rear; // behind them
+	double length{0.0};
+};
+// the lengths of a station track, as the list of the tracks of a station gives them: the rozporządzenie of the minister of
+// infrastructure on the railway structures (Dz.U. 2026 poz. 1225) § 2
+struct lengths
+{
+	std::string number;
+	double construction{0.0}; // between the ends of the switches at its ends, or to the buffer stop, the switches within it left out
+	// the useful one, of the trains running along the chainage, then of those running against it: from the signal they stop by back
+	// to the joint, the fouling point or the level crossing behind them, between those where no signal stands
+	std::array<stand, 2> ways;
+	std::vector<glm::dvec3> points; // along the track from its end at the lower chainage, through the switches within it
+	std::vector<double> distances; // of the points, from that end
+};
+// the lengths of the station tracks, the signals standing by them among the signals given
+std::vector<lengths> track_lengths(layout const &Layout, std::vector<numbered> const &Tracks, std::vector<signal> const &Signals);
+
 } // namespace station