Provide context for evaluated functions

Author: colemanw

select2.js

@@ -568,10 +568,18 @@ the specific language governing permissions and limitations under the Apache Lic
         throw new Error(formatterName +" must be a string, function, or falsy value");
     }
 
-    function evaluate(val) {
+  /**
+   * Returns a given value
+   * If given a function, returns its output
+   *
+   * @param val string|function
+   * @param context value of "this" to be passed to function
+   * @returns {*}
+   */
+    function evaluate(val, context) {
         if ($.isFunction(val)) {
-            var args = Array.prototype.slice.call(arguments, 1);
-            return val.apply(null, args);
+            var args = Array.prototype.slice.call(arguments, 2);
+            return val.apply(context, args);
         }
         return val;
     }
@@ -700,8 +708,8 @@ the specific language governing permissions and limitations under the Apache Lic
             syncCssClasses(this.container, this.opts.element, this.opts.adaptContainerCssClass);
 
             this.container.attr("style", opts.element.attr("style"));
-            this.container.css(evaluate(opts.containerCss));
-            this.container.addClass(evaluate(opts.containerCssClass));
+            this.container.css(evaluate(opts.containerCss, this.opts.element));
+            this.container.addClass(evaluate(opts.containerCssClass, this.opts.element));
 
             this.elementTabIndex = this.opts.element.attr("tabindex");
 
@@ -718,7 +726,7 @@ the specific language governing permissions and limitations under the Apache Lic
 
             syncCssClasses(this.dropdown, this.opts.element, this.opts.adaptDropdownCssClass);
 
-            this.dropdown.addClass(evaluate(opts.dropdownCssClass));
+            this.dropdown.addClass(evaluate(opts.dropdownCssClass, this.opts.element));
             this.dropdown.data("select2", this);
             this.dropdown.on("click", killEvent);
 
@@ -1057,10 +1065,10 @@ the specific language governing permissions and limitations under the Apache Lic
                 this.readonly(readonly);
 
                 syncCssClasses(this.container, this.opts.element, this.opts.adaptContainerCssClass);
-                this.container.addClass(evaluate(this.opts.containerCssClass));
+                this.container.addClass(evaluate(this.opts.containerCssClass, this.opts.element));
 
                 syncCssClasses(this.dropdown, this.opts.element, this.opts.adaptDropdownCssClass);
-                this.dropdown.addClass(evaluate(this.opts.dropdownCssClass));
+                this.dropdown.addClass(evaluate(this.opts.dropdownCssClass, this.opts.element));
 
             });
 
@@ -1263,7 +1271,7 @@ the specific language governing permissions and limitations under the Apache Lic
                 this.container.removeClass("select2-drop-above");
                 $dropdown.removeClass("select2-drop-above");
             }
-            css = $.extend(css, evaluate(this.opts.dropdownCss));
+            css = $.extend(css, evaluate(this.opts.dropdownCss, this.opts.element));
 
             $dropdown.css(css);
         },
@@ -1420,7 +1428,7 @@ the specific language governing permissions and limitations under the Apache Lic
 
         //abstract
         getMaximumSelectionSize: function() {
-            return evaluate(this.opts.maximumSelectionSize);
+            return evaluate(this.opts.maximumSelectionSize, this.opts.element);
         },
 
         // abstract
@@ -1570,7 +1578,7 @@ the specific language governing permissions and limitations under the Apache Lic
                     self.postprocessResults(data, false, false);
 
                     if (data.more===true) {
-                        more.detach().appendTo(results).text(evaluate(self.opts.formatLoadMore, page+1));
+                        more.detach().appendTo(results).text(evaluate(self.opts.formatLoadMore, self.opts.element, page+1));
                         window.setTimeout(function() { self.loadMoreIfNeeded(); }, 10);
                     } else {
                         more.remove();
@@ -1638,14 +1646,14 @@ the specific language governing permissions and limitations under the Apache Lic
             if (maxSelSize >=1) {
                 data = this.data();
                 if ($.isArray(data) && data.length >= maxSelSize && checkFormatter(opts.formatSelectionTooBig, "formatSelectionTooBig")) {
-                    render("<li class='select2-selection-limit'>" + evaluate(opts.formatSelectionTooBig, maxSelSize) + "</li>");
+                    render("<li class='select2-selection-limit'>" + evaluate(opts.formatSelectionTooBig, opts.element, maxSelSize) + "</li>");
                     return;
                 }
             }
 
             if (search.val().length < opts.minimumInputLength) {
                 if (checkFormatter(opts.formatInputTooShort, "formatInputTooShort")) {
-                    render("<li class='select2-no-results'>" + evaluate(opts.formatInputTooShort, search.val(), opts.minimumInputLength) + "</li>");
+                    render("<li class='select2-no-results'>" + evaluate(opts.formatInputTooShort, opts.element, search.val(), opts.minimumInputLength) + "</li>");
                 } else {
                     render("");
                 }
@@ -1655,15 +1663,15 @@ the specific language governing permissions and limitations under the Apache Lic
 
             if (opts.maximumInputLength && search.val().length > opts.maximumInputLength) {
                 if (checkFormatter(opts.formatInputTooLong, "formatInputTooLong")) {
-                    render("<li class='select2-no-results'>" + evaluate(opts.formatInputTooLong, search.val(), opts.maximumInputLength) + "</li>");
+                    render("<li class='select2-no-results'>" + evaluate(opts.formatInputTooLong, opts.element, search.val(), opts.maximumInputLength) + "</li>");
                 } else {
                     render("");
                 }
                 return;
             }
 
             if (opts.formatSearching && this.findHighlightableChoices().length === 0) {
-                render("<li class='select2-searching'>" + evaluate(opts.formatSearching) + "</li>");
+                render("<li class='select2-searching'>" + evaluate(opts.formatSearching, opts.element) + "</li>");
             }
 
             search.addClass("select2-active");
@@ -1714,15 +1722,15 @@ the specific language governing permissions and limitations under the Apache Lic
                 }
 
                 if (data.results.length === 0 && checkFormatter(opts.formatNoMatches, "formatNoMatches")) {
-                    render("<li class='select2-no-results'>" + evaluate(opts.formatNoMatches, search.val()) + "</li>");
+                    render("<li class='select2-no-results'>" + evaluate(opts.formatNoMatches, opts.element, search.val()) + "</li>");
                     return;
                 }
 
                 results.empty();
                 self.opts.populateResults.call(this, results, data.results, {term: search.val(), page: this.resultsPage, context:null});
 
                 if (data.more === true && checkFormatter(opts.formatLoadMore, "formatLoadMore")) {
-                    results.append("<li class='select2-more-results'>" + self.opts.escapeMarkup(evaluate(opts.formatLoadMore, this.resultsPage)) + "</li>");
+                    results.append("<li class='select2-more-results'>" + opts.escapeMarkup(evaluate(opts.formatLoadMore, opts.element, this.resultsPage)) + "</li>");
                     window.setTimeout(function() { self.loadMoreIfNeeded(); }, 10);
                 }
 
@@ -3046,7 +3054,7 @@ the specific language governing permissions and limitations under the Apache Lic
             if(!this.opts.createSearchChoice && !choices.filter('.select2-result:not(.select2-selected)').length > 0){
                 if(!data || data && !data.more && this.results.find(".select2-no-results").length === 0) {
                     if (checkFormatter(self.opts.formatNoMatches, "formatNoMatches")) {
-                        this.results.append("<li class='select2-no-results'>" + evaluate(self.opts.formatNoMatches, self.search.val()) + "</li>");
+                        this.results.append("<li class='select2-no-results'>" + evaluate(self.opts.formatNoMatches, self.opts.element, self.search.val()) + "</li>");
                     }
                 }
             }