+ fixes #2047: Don't register recent files which can't be opened

src/Gui/Application.cpp

@@ -595,9 +595,14 @@ void Application::exportTo(const char* FileName, const char* DocName, const char
 
             std::string code = str.str();
             // the original file name is required
-            if (runPythonCode(code.c_str(), false))
-                getMainWindow()->appendRecentFile(QString::fromUtf8(File.filePath().c_str()));
-
+            if (runPythonCode(code.c_str(), false)) {
+                // search for a module that is able to open the exported file because otherwise
+                // it doesn't need to be added to the recent files list (#0002047)
+                std::map<std::string, std::string> importMap = App::GetApplication().getImportFilters(te.c_str());
+                if (!importMap.empty())
+                    getMainWindow()->appendRecentFile(QString::fromUtf8(File.filePath().c_str()));
+            }
+
             // allow exporters to pass _objs__ to submodules before deleting it
             runPythonCode("del __objs__", false);
         }