Be able to limit each input to a maximum length

Author: tispratik

select2.js

@@ -1248,6 +1248,15 @@ the specific language governing permissions and limitations under the Apache Lic
                 render("<li class='select2-searching'>" + opts.formatSearching() + "</li>");
             }
 
+            if (opts.maximumInputLength && search.val().length > opts.maximumInputLength) {
+                if (checkFormatter(opts.formatInputTooLong, "formatInputTooLong")) {
+                    render("<li class='select2-no-results'>" + opts.formatInputTooLong(search.val(), opts.maximumInputLength) + "</li>");
+                } else {
+                    render("");
+                }
+                return;
+            }
+
             // give the tokenizer a chance to pre-process the input
             input = this.tokenize();
             if (input != undefined && input != null) {
@@ -2405,11 +2414,13 @@ the specific language governing permissions and limitations under the Apache Lic
         formatResultCssClass: function(data) {return undefined;},
         formatNoMatches: function () { return "No matches found"; },
         formatInputTooShort: function (input, min) { var n = min - input.length; return "Please enter " + n + " more character" + (n == 1? "" : "s"); },
+        formatInputTooLong: function (input, max) { var n = input.length - max; return "Please enter " + n + " less character" + (n == 1? "" : "s"); },
         formatSelectionTooBig: function (limit) { return "You can only select " + limit + " item" + (limit == 1 ? "" : "s"); },
         formatLoadMore: function (pageNumber) { return "Loading more results..."; },
         formatSearching: function () { return "Searching..."; },
         minimumResultsForSearch: 0,
         minimumInputLength: 0,
+        maximumInputLength: null,
         maximumSelectionSize: 0,
         id: function (e) { return e.id; },
         matcher: function(term, text) {