[Spreadsheet] Fix CSV import by insert

src/Mod/Spreadsheet/Gui/AppSpreadsheetGui.cpp

@@ -60,6 +60,7 @@ public:
         : Py::ExtensionModule<Module>("SpreadsheetGui")
     {
         add_varargs_method("open", &Module::open);
+        add_varargs_method("insert", &Module::insert);
         initialize("This module is the SpreadsheetGui module.");  // register with Python
     }
 
@@ -90,6 +91,32 @@ private:
 
         return Py::None();
     }
+
+    Py::Object insert(const Py::Tuple& args)
+    {
+        char* Name;
+        const char* DocName = nullptr;
+        if (!PyArg_ParseTuple(args.ptr(), "et|s", "utf-8", &Name, &DocName)) {
+            throw Py::Exception();
+        }
+        std::string EncodedName = std::string(Name);
+        PyMem_Free(Name);
+
+        try {
+            Base::FileInfo file(EncodedName);
+            App::Document* pcDoc = Gui::Application::Instance->activeDocument()->getDocument();
+            Spreadsheet::Sheet* pcSheet = static_cast<Spreadsheet::Sheet*>(
+                pcDoc->addObject("Spreadsheet::Sheet", file.fileNamePure().c_str()));
+
+            pcSheet->importFromFile(EncodedName, '\t', '"', '\\');
+            pcSheet->execute();
+        }
+        catch (const Base::Exception& e) {
+            throw Py::RuntimeError(e.what());
+        }
+
+        return Py::None();
+    }
 };
 
 PyObject* initModule()