Draft: Center Snap can now also snap to center of faces

src/Mod/Draft/DraftSnap.py

@@ -319,7 +319,11 @@ def cstr(point):
                                 elif et == "Ellipse":
                                     # extra ellipse options
                                     snaps.extend(self.snapToCenter(edge))
-
+                        elif "Face" in comp:
+                            en = int(comp[4:])-1
+                            if len(obj.Shape.Faces) > en:
+                                face = obj.Shape.Faces[en]
+                                snaps.extend(self.snapToFace(face))
                         elif "Vertex" in comp:
                             # directly snapped to a vertex
                             snaps.append(self.snapToVertex(self.snapInfo,active=True))
@@ -749,6 +753,15 @@ def snapToCenter(self,shape):
             else:
                 snaps.append([c,'center',c])
         return snaps
+
+    def snapToFace(self,shape):
+        "returns a face center snap location"
+        snaps = []
+        if self.isEnabled("center"):
+            pos = shape.CenterOfMass
+            c = self.toWP(pos)
+            snaps.append([pos,'center',c])
+        return snaps
 
     def snapToIntersection(self,shape):
         "returns a list of intersection snap locations"