Sketcher: SketchObject - Add ability to diagnose constraint redundancy before addition

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It preserves the SketchObject properties. Therefore it does not trigger any property update, redraws, ...

src/Mod/Sketcher/App/SketchObject.cpp

@@ -694,6 +694,24 @@ int SketchObject::setUpSketch()
         Constraints.touch();
 
     return lastDoF;
+}
+
+int SketchObject::diagnoseAdditionalConstraints(std::vector<Sketcher::Constraint *> additionalconstraints)
+{
+    auto objectconstraints = Constraints.getValues();
+
+    std::vector<Sketcher::Constraint *> allconstraints;
+    allconstraints.reserve(objectconstraints.size()+additionalconstraints.size());
+
+    std::copy(objectconstraints.begin(), objectconstraints.end(), back_inserter(allconstraints));
+    std::copy(additionalconstraints.begin(), additionalconstraints.end(), back_inserter(allconstraints));
+
+    lastDoF = solvedSketch.setUpSketch(getCompleteGeometry(), allconstraints,
+                                       getExternalGeometryCount());
+
+    retrieveSolverDiagnostics();
+
+    return lastDoF;
 
 }
 

src/Mod/Sketcher/App/SketchObject.h

@@ -211,6 +211,9 @@ public:
      */
     int setUpSketch();
 
+    /** Performs a full analysis of the addition of additional constraints without adding them to the sketch object */
+    int diagnoseAdditionalConstraints(std::vector<Sketcher::Constraint *> additionalconstraints);
+
     /** solves the sketch and updates the geometry, but not all the dependent features (does not recompute)
         When a recompute is necessary, recompute triggers execute() which solves the sketch and updates all dependent features
         When a solve only is necessary (e.g. DoF changed), solve() solves the sketch and