OO-904 fix auto-correction of max length in FIB input fields to properly support synonyms

src/main/java/org/olat/ims/qti/editor/FIBItemController.java

@@ -198,7 +198,19 @@ public class FIBItemController extends DefaultController implements ControllerEv
 							if (size != null) response.setSizeFromString(size);
 							String maxLength = ureq.getParameter("maxl_q" + i);
 							if (maxLength != null) response.setMaxLengthFromString(maxLength);
-							if (response.getCorrectBlank().length() > response.getMaxLength()) response.setMaxLength(response.getCorrectBlank().length());
+
+							// find longest correct blank in all synonyms of
+							// correct answers, fix max lenght if a longer value
+							// is found
+							String[] allCorrect = response.getCorrectBlank().split(";");
+							int longestCorrect = 0;
+							for (int j = 0; j < allCorrect.length; j++) {
+								String singleCorrect = allCorrect[j];
+								if (singleCorrect.length()  > longestCorrect) {
+									longestCorrect = singleCorrect.length();
+								}
+							}
+							if (longestCorrect > response.getMaxLength()) response.setMaxLength(longestCorrect);
 						}
 					}
 				}