- auto id = fix_id(font->id());
- if (used_ids.find(id) == used_ids.end()) {
- /* This ID is unique so we can just use it as-is */
- _fonts.put(font, id);
- used_ids.insert(id);
- } else {
- auto end = underscore_number_position(id);
- if (end == string::npos) {
- /* This string has no _N suffix, so add one */
- id += "_0";
- end = underscore_number_position(id);
- }
-
- ++end;
-
- /* Increment the suffix until we find a unique one */
- auto number = dcp::raw_convert<int>(id.substr(end));
- while (used_ids.find(id) != used_ids.end()) {
- ++number;
- id = String::compose("%1_%2", id.substr(0, end - 1), number);
- }
- used_ids.insert(id);
- }
- _fonts.put(font, id);