Fix for loading of FGFP plans.

Where the plan does not contain departure / arrival WPs, fire the
corresponding delegate methods after load, to run the selection logic.

Also, add a ‘loaded’ delegate callback, to give delegates a chance to
perform validation and fix-up after all flight-plan loads.

src/Navaids/FlightPlan.cxx

@@ -334,6 +334,7 @@ void FlightPlan::setCurrentIndex(int index)
   lockDelegates();
   _currentIndex = index;
   _currentWaypointChanged = true;
+    _didLoadFP = true;
   unlockDelegates();
 }
 
@@ -764,6 +765,16 @@ void FlightPlan::saveToProperties(SGPropertyNode* d) const
     } // of waypoint iteration
 }
 
+static bool anyWaypointsWithFlag(FlightPlan* plan, WayptFlag flag)
+{
+    bool r = false;
+    plan->forEachLeg([&r, flag](FlightPlan::Leg* l) {
+        if (l->waypoint()->flags() && flag) {
+            r = true;
+        }
+    });
+}
+
 bool FlightPlan::load(const SGPath& path)
 {
     if (!path.exists()) {
@@ -787,8 +798,13 @@ bool FlightPlan::load(const SGPath& path)
         // a load, since we assume the flight-plan had it specified already
         // especially, the XML might have a SID/STAR embedded, which we don't
         // want to lose
-        _arrivalChanged = false;
+        
-        _departureChanged = false;
+        // however, we do want to run the normal delegate if no procedure was
+        // defined. We'll use the presence of waypoints tagged to decide
+        const bool hasArrival = anyWaypointsWithFlag(this, WPT_ARRIVAL);
+        const bool hasDeparture = anyWaypointsWithFlag(this, WPT_DEPARTURE);
+        _arrivalChanged = !hasArrival;
+        _departureChanged = !hasDeparture;
         Status = true;
     } else if (loadPlainTextFormat(path)) { // simple textual list of waypoints
         _arrivalChanged = true;
@@ -1696,6 +1712,13 @@ void FlightPlan::unlockDelegates()
     return;
   }
   
+    if (_didLoadFP) {
+        _didLoadFP = false;
+        for (auto d : _delegates) {
+          d->loaded();
+        }
+    }
+    
   if (_departureChanged) {
     _departureChanged = false;
     for (auto d : _delegates) {
@@ -2115,4 +2138,9 @@ int FlightPlan::cruiseAltitudeFt() const
     return _cruiseAltitudeFt;
 }
 
+void FlightPlan::forEachLeg(const LegVisitor& lv)
+{
+    std::for_each(_legs.begin(), _legs.end(), lv);
+}
+
 } // of namespace flightgear

src/Navaids/FlightPlan.hxx

@@ -24,6 +24,8 @@
 #ifndef FG_FLIGHTPLAN_HXX
 #define FG_FLIGHTPLAN_HXX
 
+#include <functional>
+
 #include <Navaids/route.hxx>
 #include <Airports/airport.hxx>
 
@@ -186,6 +188,8 @@ public:
     
     virtual void currentWaypointChanged() { }
     virtual void endOfFlightPlan() { }
+      
+      virtual void loaded() { }
   protected:
     Delegate();
 
@@ -373,6 +377,9 @@ public:
 
   void addDelegate(Delegate* d);
   void removeDelegate(Delegate* d);
+    
+    using LegVisitor = std::function<void(Leg*)>;
+    void forEachLeg(const LegVisitor& lv);
 private:
   friend class Leg;
   
@@ -384,11 +391,12 @@ private:
   void notifyCleared();
     
   unsigned int _delegateLock = 0;
-  bool _arrivalChanged,
+  bool _arrivalChanged = false,
-    _departureChanged,
+    _departureChanged = false,
-    _waypointsChanged,
+    _waypointsChanged = false,
-    _currentWaypointChanged,
+    _currentWaypointChanged = false,
-    _cruiseDataChanged;
+    _cruiseDataChanged = false;
+  bool _didLoadFP = false;
     
     void saveToProperties(SGPropertyNode* d) const;
     

src/Scripting/NasalPositioned.cxx

@@ -2426,6 +2426,11 @@ public:
   {
     callDelegateMethod("sequence");
   }
+    
+    void loaded() override
+    {
+        callDelegateMethod("loaded");
+    }
 private:
 
   void callDelegateMethod(const char* method)

test_suite/unit_tests/Navaids/test_routeManager.cxx

@@ -599,7 +599,7 @@ void RouteManagerTests::loadGPX()
 }
 
 // The same test as above, but for a file exported from the route manager or online
-void RouteManagerTests::loadFgfp()
+void RouteManagerTests::loadFGFP()
 {
     auto rm = globals->get_subsystem<FGRouteMgr>();
     

test_suite/unit_tests/Navaids/test_routeManager.hxx

@@ -41,7 +41,7 @@ class RouteManagerTests : public CppUnit::TestFixture
     CPPUNIT_TEST(testSequenceDiscontinuityAndResume);
     CPPUNIT_TEST(testHiddenWaypoints);
     CPPUNIT_TEST(loadGPX);
-    CPPUNIT_TEST(loadFgfp);
+    CPPUNIT_TEST(loadFGFP);
     
     CPPUNIT_TEST_SUITE_END();
 
@@ -65,7 +65,7 @@ public:
     void testSequenceDiscontinuityAndResume();
     void testHiddenWaypoints();
     void loadGPX();
-    void loadFgfp();
+    void loadFGFP();
 private:
     GPS* m_gps = nullptr;
 };