[TD]add label translation for Page and Template

src/Mod/TechDraw/App/DrawPagePyImp.cpp

@@ -121,6 +121,49 @@ PyObject* DrawPagePy::requestPaint(PyObject* args)
     Py_Return;
 }
 
+//! replace the current Label with a translated version
+PyObject* DrawPagePy::translateLabel(PyObject *args)
+{
+    PyObject* pyContext;
+    PyObject* pyBaseName;
+    PyObject* pyUniqueName;
+    std::string context;
+    std::string baseName;
+    std::string uniqueName;
+
+    if (!PyArg_ParseTuple(args, "OOO", &pyContext, &pyBaseName, &pyUniqueName)) {
+            throw Py::TypeError("Could not translate label - bad parameters.");
+    }
+
+    Py_ssize_t size = 0;
+    const char* cContext = PyUnicode_AsUTF8AndSize(pyContext, &size);
+    if (cContext) {
+        context = std::string(cContext, size);
+    } else {
+        throw Py::TypeError("Could not translate label - context not available.");
+    }
+
+    const char* cBaseName = PyUnicode_AsUTF8AndSize(pyBaseName, &size);
+    if (cBaseName) {
+        baseName = std::string(cBaseName, size);
+    } else {
+        throw Py::TypeError("Could not translate label - base name not available.");
+    }
+
+    const char* cUniqueName = PyUnicode_AsUTF8AndSize(pyUniqueName, &size);
+    if (cUniqueName) {
+        uniqueName = std::string(cUniqueName, size);
+    } else {
+        throw Py::TypeError("Could not translate label - unique name not available.");
+    }
+
+    // we have the 3 parameters we need for DrawPage::translateLabel
+    DrawPage* page = getDrawPagePtr();
+    page->translateLabel(context, baseName, uniqueName);
+
+    Py_Return;
+}
+
 Py::Float DrawPagePy::getPageWidth() const
 {
     return Py::Float(getDrawPagePtr()->getPageWidth());