From 84cf134a4e889e5ac85641bb2ac732b015911174 Mon Sep 17 00:00:00 2001
From: jdecuyper <jerome.decuyper@gmail.com>
Date: Sun, 19 Jan 2014 21:12:39 -0600
Subject: [PATCH] Add hideSelectionFromResult function

---
 select2.js | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/select2.js b/select2.js
index 14f6c620..2d3f631d 100644
--- a/select2.js
+++ b/select2.js
@@ -2257,13 +2257,14 @@ the specific language governing permissions and limitations under the Apache Lic
 
         // single
         postprocessResults: function (data, initial, noHighlightUpdate) {
-            var selected = 0, self = this, showSearchInput = true;
+            var selected = 0, selectedElm = null, self = this, showSearchInput = true;
 
             // find the selected element in the result list
 
             this.findHighlightableChoices().each2(function (i, elm) {
                 if (equal(self.id(elm.data("select2-data")), self.opts.element.val())) {
                     selected = i;
+                    selectedElm = elm;
                     return false;
                 }
             });
@@ -2271,7 +2272,14 @@ the specific language governing permissions and limitations under the Apache Lic
             // and highlight it
             if (noHighlightUpdate !== false) {
                 if (initial === true && selected >= 0) {
-                    this.highlight(selected);
+                    // By default, the selected item is displayed inside the result list from a single select
+                    // User can provide an implementation for 'hideSelectionFromResult' and hide it 
+                    if(this.opts.hideSelectionFromResult !== undefined && selectedElm !== null) {
+                        if(this.opts.hideSelectionFromResult(selectedElm))
+                            selectedElm.addClass("select2-selected");
+                    }
+                    else
+                        this.highlight(selected);
                 } else {
                     this.highlight(0);
                 }
@@ -2995,9 +3003,14 @@ the specific language governing permissions and limitations under the Apache Lic
             choices.each2(function (i, choice) {
                 var id = self.id(choice.data("select2-data"));
                 if (indexOf(id, val) >= 0) {
-                    choice.addClass("select2-selected");
-                    // mark all children of the selected parent as selected
-                    choice.find(".select2-result-selectable").addClass("select2-selected");
+                    // By default, the selected item is hidden from the result list inside a multi select
+                    // User can provide an implementation for 'hideSelectionFromResult' and allow the same
+                    // element to be selected multiple times.
+                    if(self.opts.hideSelectionFromResult === undefined || self.opts.hideSelectionFromResult(choice)) {
+                        choice.addClass("select2-selected");
+                        // mark all children of the selected parent as selected
+                        choice.find(".select2-result-selectable").addClass("select2-selected");
+                    }
                 }
             });
 
@@ -3313,7 +3326,8 @@ the specific language governing permissions and limitations under the Apache Lic
         selectOnBlur: false,
         adaptContainerCssClass: function(c) { return c; },
         adaptDropdownCssClass: function(c) { return null; },
-        nextSearchTerm: function(selectedObject, currentSearchTerm) { return undefined; }
+        nextSearchTerm: function(selectedObject, currentSearchTerm) { return undefined; },
+        hideSelectionFromResult: function(selectedObject) { return undefined; }
     };
 
     $.fn.select2.ajaxDefaults = {