Toponaming: Support disabling hashing; getting element history

src/App/Document.cpp

@@ -757,6 +757,12 @@ void Document::onChanged(const Property* prop)
             // recursive call of onChanged()
             this->Uid.setValue(id);
         }
+    } else if(prop == &UseHasher) {
+        for(auto obj : d->objectArray) {
+            auto geofeature = dynamic_cast<GeoFeature*>(obj);
+            if(geofeature && geofeature->getPropertyOfGeometry())
+                geofeature->enforceRecompute();
+        }
     }
 }
 
@@ -864,6 +870,8 @@ Document::Document(const char* documentName)
                       0,
                       PropertyType(Prop_None),
                       "Whether to show hidden object items in the tree view");
+    ADD_PROPERTY_TYPE(UseHasher,(true), 0,PropertyType(Prop_Hidden),
+                        "Whether to use hasher on topological naming");
 
     // this creates and sets 'TransientDir' in onChanged()
     ADD_PROPERTY_TYPE(TransientDir,
@@ -1074,10 +1082,13 @@ std::pair<bool,int> Document::addStringHasher(const StringHasherRef & hasher) co
 }
 
 StringHasherRef Document::getStringHasher(int idx) const {
+    StringHasherRef hasher;
     if(idx<0) {
-        return d->Hasher;
+        if(UseHasher.getValue()) {
+            return d->Hasher;
+        }
+        return hasher;
     }
-    StringHasherRef hasher;
     auto it = d->hashers.right.find(idx);
     if(it == d->hashers.right.end()) {
         hasher = new StringHasher;

src/App/Document.h

@@ -117,6 +117,8 @@ class AppExport Document : public App::PropertyContainer
     PropertyString TipName;
     /// Whether to show hidden items in TreeView
     PropertyBool ShowHidden;
+    /// Whether to use hasher on topological naming
+    PropertyBool UseHasher;
     //@}
 
     /** @name Signals of the document */

src/Mod/Part/App/PartFeaturePy.xml

@@ -13,5 +13,20 @@
       <Author Licence="LGPL" Name="Juergen Riegel" EMail="[email protected]" />
       <UserDocu>This is the father of all shape object classes</UserDocu>
     </Documentation>
+    <Methode Name="getElementHistory" Const="true" Keyword="true">
+      <Documentation>
+        <UserDocu>
+getElementHistory(name,recursive=True,sameType=False,showName=False) - returns the element mapped name history
+
+name: mapped element name belonging to this shape
+recursive: if True, then track back the history through other objects till the origin
+sameType: if True, then stop trace back when element type changes
+showName: if False, return the owner object, or else return a tuple of object name and label
+
+If not recursive, then return tuple(sourceObject, sourceElementName, [intermediateNames...]),
+otherwise return a list of tuple.
+        </UserDocu>
+      </Documentation>
+    </Methode>
   </PythonExport>
 </GenerateModel>

src/Mod/Part/App/PartFeaturePyImp.cpp

@@ -37,6 +37,45 @@ std::string PartFeaturePy::representation() const
     return {"<Part::PartFeature>"};
 }
 
+PyObject *PartFeaturePy::getElementHistory(PyObject *args, PyObject *kwds) {
+    const char *name;
+    PyObject *recursive = Py_True;
+    PyObject *sameType = Py_False;
+    PyObject *showName = Py_False;
+    static char *kwlist[] = {"elementName", "recursive", "sameType", "showName", nullptr};
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|OOO", kwlist, &name, &recursive, &sameType, &showName))
+        return {};
+
+    auto feature = getFeaturePtr();
+    Py::List list;
+    bool showObjName = PyObject_IsTrue(showName);
+    PY_TRY {
+        std::string tmp;
+        for (auto &history: Feature::getElementHistory(feature, name,
+                                                       PyObject_IsTrue(recursive), PyObject_IsTrue(sameType))) {
+            Py::Tuple ret(3);
+            if (history.obj) {
+                if (showObjName) {
+                    ret.setItem(0, Py::TupleN(Py::String(history.obj->getFullName()),
+                                              Py::String(history.obj->Label.getValue())));
+                } else
+                    ret.setItem(0, Py::Object(history.obj->getPyObject(), true));
+            } else
+                ret.setItem(0, Py::Int(history.tag));
+            tmp.clear();
+            ret.setItem(1, Py::String(history.element.appendToBuffer(tmp)));
+            Py::List intermedates;
+            for (auto &h: history.intermediates) {
+                tmp.clear();
+                intermedates.append(Py::String(h.appendToBuffer(tmp)));
+            }
+            ret.setItem(2, intermedates);
+            list.append(ret);
+        }
+        return Py::new_reference_to(list);
+    } PY_CATCH;
+}
+
 PyObject *PartFeaturePy::getCustomAttributes(const char* ) const
 {
     return nullptr;