DiffractionExperiment: Add option to check if rotation indexing is enabled (goniometer present + rotation indexing)

common/DiffractionExperiment.cpp

@@ -1642,3 +1642,7 @@ int64_t DiffractionExperiment::GetDarkMaskNumberOfFrames() const {
         return GetDarkMaskSettings().GetNumberOfFrames();
     return 0;
 }
+
+bool DiffractionExperiment::IsRotationIndexing() const {
+    return GetGoniometer().has_value() && indexing.GetRotationIndexing();
+}

common/DiffractionExperiment.h

@@ -404,6 +404,8 @@ public:
 
     bool IsDetectIceRings() const;
     int64_t GetDarkMaskNumberOfFrames() const;
+
+    bool IsRotationIndexing() const;
 };
 
 #endif //DIFFRACTIONEXPERIMENT_H