From e16c505c25ff0993cd186b8a23b107d4dd6cb875 Mon Sep 17 00:00:00 2001
From: Kevin Brown <kevin@kevinbrown.in>
Date: Sat, 1 Nov 2014 20:35:23 -0400
Subject: [PATCH] Move to a central key handler

This allows for any control to emit key events, and for the Select2
instance to handle them. So now the search box will allow for
results to be scrolled and selected, bringing back the old expected
functionality. This also stops triggering new queries when the
arrow keys are pressed.

The container will also be automatically focused when the dropdown
is closed, which is consistent with the old Select2.

The results will no longer be queried on initialization, but
instead will be queried when the dropdown is opened. This is more
consistent with the previous version of Select2.

The search box will now be cleared when the dropdown is closed.
---
 dist/js/select2.amd.full.js        | 185 +++++++++++++++++------------
 dist/js/select2.amd.js             | 185 +++++++++++++++++------------
 dist/js/select2.full.js            | 185 +++++++++++++++++------------
 dist/js/select2.full.min.js        |   4 +-
 dist/js/select2.js                 | 185 +++++++++++++++++------------
 dist/js/select2.min.js             |   2 +-
 src/js/select2/core.js             |  52 +++++++-
 src/js/select2/dropdown/search.js  |  18 ++-
 src/js/select2/selection/single.js |  31 +----
 src/js/select2/utils.js            |   4 +
 10 files changed, 513 insertions(+), 338 deletions(-)

diff --git a/dist/js/select2.amd.full.js b/dist/js/select2.amd.full.js
index 0960dff0..4eb1a4b0 100644
--- a/dist/js/select2.amd.full.js
+++ b/dist/js/select2.amd.full.js
@@ -107,6 +107,8 @@ window.$ = window.$ || {};(function() { if ($ && $.fn && $.fn.select2 && $.fn.se
   };
 
   Observable.prototype.on = function (event, callback) {
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.listeners[event].push(callback);
     } else {
@@ -117,6 +119,8 @@ window.$ = window.$ || {};(function() { if ($ && $.fn && $.fn.select2 && $.fn.se
   Observable.prototype.trigger = function (event) {
     var slice = Array.prototype.slice;
 
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.invoke(this.listeners[event], slice.call(arguments, 1));
     }
@@ -569,51 +573,10 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/selection/single',[
   './base',
-  '../utils',
-  '../keys'
-], function (BaseSelection, Utils, KEYS) {
+  '../utils'
+], function (BaseSelection, Utils) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -667,6 +630,8 @@ define('select2/selection/single',[
       // When the dropdown is closed, aria-expanded="false"
       self.$selection.attr('aria-expanded', 'false');
       self.$selection.removeAttr('aria-activedescendant');
+
+      self.$selection.focus();
     });
 
     this.$selection.on('focus', function (evt) {
@@ -678,29 +643,7 @@ define('select2/selection/single',[
     });
 
     this.$selection.on('keydown', function (evt) {
-      var key = evt.which;
-
-      if (container.isOpen()) {
-        if (key == KEYS.ENTER) {
-          self.trigger('results:select');
-
-          evt.preventDefault();
-        } else if (key == KEYS.UP) {
-          self.trigger('results:previous');
-
-          evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
-          self.trigger('results:next');
-
-          evt.preventDefault();
-        }
-      } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
-
-          evt.preventDefault();
-        }
-      }
+      self.trigger('keypress', evt);
     });
 
     container.on('results:focus', function (params) {
@@ -1375,8 +1318,8 @@ define('select2/dropdown',[
 });
 
 define('select2/dropdown/search',[
-
-], function () {
+  '../utils'
+], function (Utils) {
   function Search () { }
 
   Search.prototype.render = function (decorated) {
@@ -1401,8 +1344,14 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function () {
-      container.trigger('query', {
+    this.$search.on('keyup', function (evt) {
+      self.trigger('keypress', evt);
+
+      if (evt.isDefaultPrevented()) {
+        return;
+      }
+
+      self.trigger('query', {
         term: $(this).val()
       });
     });
@@ -1413,6 +1362,8 @@ define('select2/dropdown/search',[
 
     container.on('close', function () {
       self.$search.attr('tabindex', -1);
+
+      self.$search.val('');
     });
 
     container.on('results:all', function (params) {
@@ -1428,7 +1379,7 @@ define('select2/dropdown/search',[
     });
   };
 
-  Search.prototype.showSearch = function (params) {
+  Search.prototype.showSearch = function (_, params) {
     return true;
   };
 
@@ -1642,11 +1593,52 @@ define('select2/options',[
   return Options;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/core',[
   'jquery',
   './options',
-  './utils'
-], function ($, Options, Utils) {
+  './utils',
+  './keys'
+], function ($, Options, Utils, KEYS) {
   var Select2 = function ($element, options) {
     this.$element = $element;
 
@@ -1700,6 +1692,7 @@ define('select2/core',[
 
     // Register any internal event handlers
     this._registerSelectionEvents();
+    this._registerDropdownEvents();
     this._registerResultsEvents();
     this._registerEvents();
 
@@ -1711,8 +1704,6 @@ define('select2/core',[
       });
     });
 
-    this.trigger('query', {});
-
     // Hide the original select
 
     $element.hide();
@@ -1809,6 +1800,22 @@ define('select2/core',[
 
       self.close();
     });
+
+    this.selection.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
+  };
+
+  Select2.prototype._registerDropdownEvents = function () {
+    var self = this;
+
+    this.dropdown.on('query', function (params) {
+      self.trigger('query', params);
+    });
+
+    this.dropdown.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
   };
 
   Select2.prototype._registerResultsEvents = function () {
@@ -1850,6 +1857,32 @@ define('select2/core',[
         });
       });
     });
+
+    this.on('keypress', function (evt) {
+      var key = evt.which;
+
+      if (self.isOpen()) {
+        if (key == KEYS.ENTER) {
+          self.trigger('results:select');
+
+          evt.preventDefault();
+        } else if (key == KEYS.UP) {
+          self.trigger('results:previous');
+
+          evt.preventDefault();
+        } else if (key == KEYS.DOWN) {
+          self.trigger('results:next');
+
+          evt.preventDefault();
+        }
+      } else {
+        if (key == KEYS.ENTER || key == KEYS.SPACE) {
+          self.trigger('open');
+
+          evt.preventDefault();
+        }
+      }
+    });
   };
 
   Select2.prototype.toggleDropdown = function () {
@@ -1865,6 +1898,8 @@ define('select2/core',[
       return;
     }
 
+    this.trigger('query', {});
+
     this.trigger('open');
   };
 
diff --git a/dist/js/select2.amd.js b/dist/js/select2.amd.js
index 0960dff0..4eb1a4b0 100644
--- a/dist/js/select2.amd.js
+++ b/dist/js/select2.amd.js
@@ -107,6 +107,8 @@ window.$ = window.$ || {};(function() { if ($ && $.fn && $.fn.select2 && $.fn.se
   };
 
   Observable.prototype.on = function (event, callback) {
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.listeners[event].push(callback);
     } else {
@@ -117,6 +119,8 @@ window.$ = window.$ || {};(function() { if ($ && $.fn && $.fn.select2 && $.fn.se
   Observable.prototype.trigger = function (event) {
     var slice = Array.prototype.slice;
 
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.invoke(this.listeners[event], slice.call(arguments, 1));
     }
@@ -569,51 +573,10 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/selection/single',[
   './base',
-  '../utils',
-  '../keys'
-], function (BaseSelection, Utils, KEYS) {
+  '../utils'
+], function (BaseSelection, Utils) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -667,6 +630,8 @@ define('select2/selection/single',[
       // When the dropdown is closed, aria-expanded="false"
       self.$selection.attr('aria-expanded', 'false');
       self.$selection.removeAttr('aria-activedescendant');
+
+      self.$selection.focus();
     });
 
     this.$selection.on('focus', function (evt) {
@@ -678,29 +643,7 @@ define('select2/selection/single',[
     });
 
     this.$selection.on('keydown', function (evt) {
-      var key = evt.which;
-
-      if (container.isOpen()) {
-        if (key == KEYS.ENTER) {
-          self.trigger('results:select');
-
-          evt.preventDefault();
-        } else if (key == KEYS.UP) {
-          self.trigger('results:previous');
-
-          evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
-          self.trigger('results:next');
-
-          evt.preventDefault();
-        }
-      } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
-
-          evt.preventDefault();
-        }
-      }
+      self.trigger('keypress', evt);
     });
 
     container.on('results:focus', function (params) {
@@ -1375,8 +1318,8 @@ define('select2/dropdown',[
 });
 
 define('select2/dropdown/search',[
-
-], function () {
+  '../utils'
+], function (Utils) {
   function Search () { }
 
   Search.prototype.render = function (decorated) {
@@ -1401,8 +1344,14 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function () {
-      container.trigger('query', {
+    this.$search.on('keyup', function (evt) {
+      self.trigger('keypress', evt);
+
+      if (evt.isDefaultPrevented()) {
+        return;
+      }
+
+      self.trigger('query', {
         term: $(this).val()
       });
     });
@@ -1413,6 +1362,8 @@ define('select2/dropdown/search',[
 
     container.on('close', function () {
       self.$search.attr('tabindex', -1);
+
+      self.$search.val('');
     });
 
     container.on('results:all', function (params) {
@@ -1428,7 +1379,7 @@ define('select2/dropdown/search',[
     });
   };
 
-  Search.prototype.showSearch = function (params) {
+  Search.prototype.showSearch = function (_, params) {
     return true;
   };
 
@@ -1642,11 +1593,52 @@ define('select2/options',[
   return Options;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/core',[
   'jquery',
   './options',
-  './utils'
-], function ($, Options, Utils) {
+  './utils',
+  './keys'
+], function ($, Options, Utils, KEYS) {
   var Select2 = function ($element, options) {
     this.$element = $element;
 
@@ -1700,6 +1692,7 @@ define('select2/core',[
 
     // Register any internal event handlers
     this._registerSelectionEvents();
+    this._registerDropdownEvents();
     this._registerResultsEvents();
     this._registerEvents();
 
@@ -1711,8 +1704,6 @@ define('select2/core',[
       });
     });
 
-    this.trigger('query', {});
-
     // Hide the original select
 
     $element.hide();
@@ -1809,6 +1800,22 @@ define('select2/core',[
 
       self.close();
     });
+
+    this.selection.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
+  };
+
+  Select2.prototype._registerDropdownEvents = function () {
+    var self = this;
+
+    this.dropdown.on('query', function (params) {
+      self.trigger('query', params);
+    });
+
+    this.dropdown.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
   };
 
   Select2.prototype._registerResultsEvents = function () {
@@ -1850,6 +1857,32 @@ define('select2/core',[
         });
       });
     });
+
+    this.on('keypress', function (evt) {
+      var key = evt.which;
+
+      if (self.isOpen()) {
+        if (key == KEYS.ENTER) {
+          self.trigger('results:select');
+
+          evt.preventDefault();
+        } else if (key == KEYS.UP) {
+          self.trigger('results:previous');
+
+          evt.preventDefault();
+        } else if (key == KEYS.DOWN) {
+          self.trigger('results:next');
+
+          evt.preventDefault();
+        }
+      } else {
+        if (key == KEYS.ENTER || key == KEYS.SPACE) {
+          self.trigger('open');
+
+          evt.preventDefault();
+        }
+      }
+    });
   };
 
   Select2.prototype.toggleDropdown = function () {
@@ -1865,6 +1898,8 @@ define('select2/core',[
       return;
     }
 
+    this.trigger('query', {});
+
     this.trigger('open');
   };
 
diff --git a/dist/js/select2.full.js b/dist/js/select2.full.js
index f424aaf2..412193d7 100644
--- a/dist/js/select2.full.js
+++ b/dist/js/select2.full.js
@@ -9642,6 +9642,8 @@ define('select2/utils',[], function () {
   };
 
   Observable.prototype.on = function (event, callback) {
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.listeners[event].push(callback);
     } else {
@@ -9652,6 +9654,8 @@ define('select2/utils',[], function () {
   Observable.prototype.trigger = function (event) {
     var slice = Array.prototype.slice;
 
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.invoke(this.listeners[event], slice.call(arguments, 1));
     }
@@ -10104,51 +10108,10 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/selection/single',[
   './base',
-  '../utils',
-  '../keys'
-], function (BaseSelection, Utils, KEYS) {
+  '../utils'
+], function (BaseSelection, Utils) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -10202,6 +10165,8 @@ define('select2/selection/single',[
       // When the dropdown is closed, aria-expanded="false"
       self.$selection.attr('aria-expanded', 'false');
       self.$selection.removeAttr('aria-activedescendant');
+
+      self.$selection.focus();
     });
 
     this.$selection.on('focus', function (evt) {
@@ -10213,29 +10178,7 @@ define('select2/selection/single',[
     });
 
     this.$selection.on('keydown', function (evt) {
-      var key = evt.which;
-
-      if (container.isOpen()) {
-        if (key == KEYS.ENTER) {
-          self.trigger('results:select');
-
-          evt.preventDefault();
-        } else if (key == KEYS.UP) {
-          self.trigger('results:previous');
-
-          evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
-          self.trigger('results:next');
-
-          evt.preventDefault();
-        }
-      } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
-
-          evt.preventDefault();
-        }
-      }
+      self.trigger('keypress', evt);
     });
 
     container.on('results:focus', function (params) {
@@ -10910,8 +10853,8 @@ define('select2/dropdown',[
 });
 
 define('select2/dropdown/search',[
-
-], function () {
+  '../utils'
+], function (Utils) {
   function Search () { }
 
   Search.prototype.render = function (decorated) {
@@ -10936,8 +10879,14 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function () {
-      container.trigger('query', {
+    this.$search.on('keyup', function (evt) {
+      self.trigger('keypress', evt);
+
+      if (evt.isDefaultPrevented()) {
+        return;
+      }
+
+      self.trigger('query', {
         term: $(this).val()
       });
     });
@@ -10948,6 +10897,8 @@ define('select2/dropdown/search',[
 
     container.on('close', function () {
       self.$search.attr('tabindex', -1);
+
+      self.$search.val('');
     });
 
     container.on('results:all', function (params) {
@@ -10963,7 +10914,7 @@ define('select2/dropdown/search',[
     });
   };
 
-  Search.prototype.showSearch = function (params) {
+  Search.prototype.showSearch = function (_, params) {
     return true;
   };
 
@@ -11177,11 +11128,52 @@ define('select2/options',[
   return Options;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/core',[
   'jquery',
   './options',
-  './utils'
-], function ($, Options, Utils) {
+  './utils',
+  './keys'
+], function ($, Options, Utils, KEYS) {
   var Select2 = function ($element, options) {
     this.$element = $element;
 
@@ -11235,6 +11227,7 @@ define('select2/core',[
 
     // Register any internal event handlers
     this._registerSelectionEvents();
+    this._registerDropdownEvents();
     this._registerResultsEvents();
     this._registerEvents();
 
@@ -11246,8 +11239,6 @@ define('select2/core',[
       });
     });
 
-    this.trigger('query', {});
-
     // Hide the original select
 
     $element.hide();
@@ -11344,6 +11335,22 @@ define('select2/core',[
 
       self.close();
     });
+
+    this.selection.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
+  };
+
+  Select2.prototype._registerDropdownEvents = function () {
+    var self = this;
+
+    this.dropdown.on('query', function (params) {
+      self.trigger('query', params);
+    });
+
+    this.dropdown.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
   };
 
   Select2.prototype._registerResultsEvents = function () {
@@ -11385,6 +11392,32 @@ define('select2/core',[
         });
       });
     });
+
+    this.on('keypress', function (evt) {
+      var key = evt.which;
+
+      if (self.isOpen()) {
+        if (key == KEYS.ENTER) {
+          self.trigger('results:select');
+
+          evt.preventDefault();
+        } else if (key == KEYS.UP) {
+          self.trigger('results:previous');
+
+          evt.preventDefault();
+        } else if (key == KEYS.DOWN) {
+          self.trigger('results:next');
+
+          evt.preventDefault();
+        }
+      } else {
+        if (key == KEYS.ENTER || key == KEYS.SPACE) {
+          self.trigger('open');
+
+          evt.preventDefault();
+        }
+      }
+    });
   };
 
   Select2.prototype.toggleDropdown = function () {
@@ -11400,6 +11433,8 @@ define('select2/core',[
       return;
     }
 
+    this.trigger('query', {});
+
     this.trigger('open');
   };
 
diff --git a/dist/js/select2.full.min.js b/dist/js/select2.full.min.js
index e714dbdc..a1768009 100644
--- a/dist/js/select2.full.min.js
+++ b/dist/js/select2.full.min.js
@@ -1,4 +1,4 @@
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a={BACKSPACE:8,TAB:9,ENTER:13,SHIFT:16,CTRL:17,ALT:18,ESC:27,SPACE:32,PAGE_UP:33,PAGE_DOWN:34,END:35,HOME:36,LEFT:37,UP:38,RIGHT:39,DOWN:40,DELETE:46,isArrow:function(a){switch(a=a.which?a.which:a){case KEY.LEFT:case KEY.RIGHT:case KEY.UP:case KEY.DOWN:return!0}return!1}};return a}),c("select2/core",["jquery","./options","./utils","./keys"],function(a,b,c,d){var e=function(a,c){this.$element=a,this.id=this._generateId(a),c=c||{},this.options=new b(c,a),e.__super__.constructor.call(this);var d=this.options.get("dataAdapter");this.data=new d(a,this.options);var f=this.render();this._placeContainer(f);var g=this.options.get("selectionAdapter");this.selection=new g(a,this.options);var h=this.selection.render();this._placeSelection(h);var i=this.options.get("dropdownAdapter");this.dropdown=new i(a,this.options);var j=this.dropdown.render();this._placeDropdown(j);var k=this.options.get("resultsAdapter");this.results=new k(a,this.options,this.data);var l=this.results.render();this._placeResults(l);var m=this;this._bindAdapters(),this._registerDomEvents(),this._registerSelectionEvents(),this._registerDropdownEvents(),this._registerResultsEvents(),this._registerEvents(),this.data.current(function(a){m.trigger("selection:update",{data:a})}),a.hide(),a.attr("tabindex","-1"),a.data("select2",this)};return c.Extend(e,c.Observable),e.prototype._generateId=function(a){var b="";return b=null!=a.attr("id")?a.attr("id"):null!=a.attr("name")?a.attr("name")+"-"+c.generateChars(2):c.generateChars(4),b="select2-"+b},e.prototype._placeContainer=function(a){a.insertAfter(this.$element),a.width(this.$element.outerWidth(!1))},e.prototype._placeSelection=function(a){var b=this.$container.find(".selection");b.append(a)},e.prototype._placeDropdown=function(a){this.$dropdown=a;var b=this.$container.find(".dropdown-wrapper");b.append(a)},e.prototype._placeResults=function(a){var b=this.$dropdown.find(".results");b.append(a)},e.prototype._bindAdapters=function(){this.data.bind(this,this.$container),this.selection.bind(this,this.$container),this.dropdown.bind(this,this.$container),this.results.bind(this,this.$container)},e.prototype._registerDomEvents=function(){var a=this;this.$element.on("change",function(){a.data.current(function(b){a.trigger("selection:update",{data:b})})})},e.prototype._registerSelectionEvents=function(){var a=this;this.selection.on("open",function(){a.open()}),this.selection.on("close",function(){a.close()}),this.selection.on("toggle",function(){a.toggleDropdown()}),this.selection.on("results:select",function(){a.trigger("results:select")}),this.selection.on("results:previous",function(){a.trigger("results:previous")}),this.selection.on("results:next",function(){a.trigger("results:next")}),this.selection.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.selection.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerDropdownEvents=function(){var a=this;this.dropdown.on("query",function(b){a.trigger("query",b)}),this.dropdown.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerResultsEvents=function(){var a=this;this.results.on("selected",function(b){a.trigger("select",b),a.close()}),this.results.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.results.on("results:focus",function(b){a.trigger("results:focus",b)})},e.prototype._registerEvents=function(){var a=this;this.on("open",function(){a.$container.addClass("open")}),this.on("close",function(){a.$container.removeClass("open")}),this.on("query",function(b){this.data.query(b,function(c){a.trigger("results:all",{data:c,query:b})})}),this.on("keypress",function(b){var c=b.which;a.isOpen()?c==d.ENTER?(a.trigger("results:select"),b.preventDefault()):c==d.UP?(a.trigger("results:previous"),b.preventDefault()):c==d.DOWN&&(a.trigger("results:next"),b.preventDefault()):(c==d.ENTER||c==d.SPACE)&&(a.trigger("open"),b.preventDefault())})},e.prototype.toggleDropdown=function(){this.isOpen()?this.close():this.open()},e.prototype.open=function(){this.isOpen()||(this.trigger("query",{}),this.trigger("open"))},e.prototype.close=function(){this.isOpen()&&this.trigger("close")},e.prototype.isOpen=function(){return this.$container.hasClass("open")},e.prototype.render=function(){var b=a('<span class="select2 select2-container select2-theme-default"><span class="selection"></span><span class="dropdown-wrapper" aria-hidden="true"></span></span>');return this.$container=b,b.data("element",this.$element),b},e}),c("jquery.select2",["jquery","select2/core"],function(a,b){return null==a.fn.select2&&(a.fn.select2=function(c){if(c=c||{},"object"==typeof c)this.each(function(){new b(a(this),c)});else{if("string"!=typeof c)throw new Error("Invalid arguments for Select2: "+c);var d=this.data("select2"),e=Array.prototype.slice.call(arguments,1);d[c](e)}}),b}),b("jquery.select2"),$.fn.select2.amd={define:c,require:b}}();
\ No newline at end of file
diff --git a/dist/js/select2.js b/dist/js/select2.js
index 42ec46b9..23308a79 100644
--- a/dist/js/select2.js
+++ b/dist/js/select2.js
@@ -535,6 +535,8 @@ define('select2/utils',[], function () {
   };
 
   Observable.prototype.on = function (event, callback) {
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.listeners[event].push(callback);
     } else {
@@ -545,6 +547,8 @@ define('select2/utils',[], function () {
   Observable.prototype.trigger = function (event) {
     var slice = Array.prototype.slice;
 
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.invoke(this.listeners[event], slice.call(arguments, 1));
     }
@@ -997,51 +1001,10 @@ define('select2/selection/base',[
   return BaseSelection;
 });
 
-define('select2/keys',[
-
-], function () {
-  var KEYS = {
-    BACKSPACE: 8,
-    TAB: 9,
-    ENTER: 13,
-    SHIFT: 16,
-    CTRL: 17,
-    ALT: 18,
-    ESC: 27,
-    SPACE: 32,
-    PAGE_UP: 33,
-    PAGE_DOWN: 34,
-    END: 35,
-    HOME: 36,
-    LEFT: 37,
-    UP: 38,
-    RIGHT: 39,
-    DOWN: 40,
-    DELETE: 46,
-
-    isArrow: function (k) {
-        k = k.which ? k.which : k;
-
-        switch (k) {
-        case KEY.LEFT:
-        case KEY.RIGHT:
-        case KEY.UP:
-        case KEY.DOWN:
-            return true;
-        }
-
-        return false;
-    }
-  };
-
-  return KEYS;
-});
-
 define('select2/selection/single',[
   './base',
-  '../utils',
-  '../keys'
-], function (BaseSelection, Utils, KEYS) {
+  '../utils'
+], function (BaseSelection, Utils) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -1095,6 +1058,8 @@ define('select2/selection/single',[
       // When the dropdown is closed, aria-expanded="false"
       self.$selection.attr('aria-expanded', 'false');
       self.$selection.removeAttr('aria-activedescendant');
+
+      self.$selection.focus();
     });
 
     this.$selection.on('focus', function (evt) {
@@ -1106,29 +1071,7 @@ define('select2/selection/single',[
     });
 
     this.$selection.on('keydown', function (evt) {
-      var key = evt.which;
-
-      if (container.isOpen()) {
-        if (key == KEYS.ENTER) {
-          self.trigger('results:select');
-
-          evt.preventDefault();
-        } else if (key == KEYS.UP) {
-          self.trigger('results:previous');
-
-          evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
-          self.trigger('results:next');
-
-          evt.preventDefault();
-        }
-      } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
-
-          evt.preventDefault();
-        }
-      }
+      self.trigger('keypress', evt);
     });
 
     container.on('results:focus', function (params) {
@@ -1803,8 +1746,8 @@ define('select2/dropdown',[
 });
 
 define('select2/dropdown/search',[
-
-], function () {
+  '../utils'
+], function (Utils) {
   function Search () { }
 
   Search.prototype.render = function (decorated) {
@@ -1829,8 +1772,14 @@ define('select2/dropdown/search',[
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function () {
-      container.trigger('query', {
+    this.$search.on('keyup', function (evt) {
+      self.trigger('keypress', evt);
+
+      if (evt.isDefaultPrevented()) {
+        return;
+      }
+
+      self.trigger('query', {
         term: $(this).val()
       });
     });
@@ -1841,6 +1790,8 @@ define('select2/dropdown/search',[
 
     container.on('close', function () {
       self.$search.attr('tabindex', -1);
+
+      self.$search.val('');
     });
 
     container.on('results:all', function (params) {
@@ -1856,7 +1807,7 @@ define('select2/dropdown/search',[
     });
   };
 
-  Search.prototype.showSearch = function (params) {
+  Search.prototype.showSearch = function (_, params) {
     return true;
   };
 
@@ -2070,11 +2021,52 @@ define('select2/options',[
   return Options;
 });
 
+define('select2/keys',[
+
+], function () {
+  var KEYS = {
+    BACKSPACE: 8,
+    TAB: 9,
+    ENTER: 13,
+    SHIFT: 16,
+    CTRL: 17,
+    ALT: 18,
+    ESC: 27,
+    SPACE: 32,
+    PAGE_UP: 33,
+    PAGE_DOWN: 34,
+    END: 35,
+    HOME: 36,
+    LEFT: 37,
+    UP: 38,
+    RIGHT: 39,
+    DOWN: 40,
+    DELETE: 46,
+
+    isArrow: function (k) {
+        k = k.which ? k.which : k;
+
+        switch (k) {
+        case KEY.LEFT:
+        case KEY.RIGHT:
+        case KEY.UP:
+        case KEY.DOWN:
+            return true;
+        }
+
+        return false;
+    }
+  };
+
+  return KEYS;
+});
+
 define('select2/core',[
   'jquery',
   './options',
-  './utils'
-], function ($, Options, Utils) {
+  './utils',
+  './keys'
+], function ($, Options, Utils, KEYS) {
   var Select2 = function ($element, options) {
     this.$element = $element;
 
@@ -2128,6 +2120,7 @@ define('select2/core',[
 
     // Register any internal event handlers
     this._registerSelectionEvents();
+    this._registerDropdownEvents();
     this._registerResultsEvents();
     this._registerEvents();
 
@@ -2139,8 +2132,6 @@ define('select2/core',[
       });
     });
 
-    this.trigger('query', {});
-
     // Hide the original select
 
     $element.hide();
@@ -2237,6 +2228,22 @@ define('select2/core',[
 
       self.close();
     });
+
+    this.selection.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
+  };
+
+  Select2.prototype._registerDropdownEvents = function () {
+    var self = this;
+
+    this.dropdown.on('query', function (params) {
+      self.trigger('query', params);
+    });
+
+    this.dropdown.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
   };
 
   Select2.prototype._registerResultsEvents = function () {
@@ -2278,6 +2285,32 @@ define('select2/core',[
         });
       });
     });
+
+    this.on('keypress', function (evt) {
+      var key = evt.which;
+
+      if (self.isOpen()) {
+        if (key == KEYS.ENTER) {
+          self.trigger('results:select');
+
+          evt.preventDefault();
+        } else if (key == KEYS.UP) {
+          self.trigger('results:previous');
+
+          evt.preventDefault();
+        } else if (key == KEYS.DOWN) {
+          self.trigger('results:next');
+
+          evt.preventDefault();
+        }
+      } else {
+        if (key == KEYS.ENTER || key == KEYS.SPACE) {
+          self.trigger('open');
+
+          evt.preventDefault();
+        }
+      }
+    });
   };
 
   Select2.prototype.toggleDropdown = function () {
@@ -2293,6 +2326,8 @@ define('select2/core',[
       return;
     }
 
+    this.trigger('query', {});
+
     this.trigger('open');
   };
 
diff --git a/dist/js/select2.min.js b/dist/js/select2.min.js
index cbfb78ee..2cf2122c 100644
--- a/dist/js/select2.min.js
+++ b/dist/js/select2.min.js
@@ -1 +1 @@
-window.$=window.$||{},function(){$&&$.fn&&$.fn.select2&&$.fn.select2.amd&&(c=$.fn.select2.amd.define,b=$.fn.select2.amd.require);var a,b,c;!function(d){function e(a,b){return u.call(a,b)}function f(a,b){var c,d,e,f,g,h,i,j,k,l,m,n=b&&b.split("/"),o=s.map,p=o&&o["*"]||{};if(a&&"."===a.charAt(0))if(b){for(n=n.slice(0,n.length-1),a=a.split("/"),g=a.length-1,s.nodeIdCompat&&w.test(a[g])&&(a[g]=a[g].replace(w,"")),a=n.concat(a),k=0;k<a.length;k+=1)if(m=a[k],"."===m)a.splice(k,1),k-=1;else if(".."===m){if(1===k&&(".."===a[2]||".."===a[0]))break;k>0&&(a.splice(k-1,2),k-=2)}a=a.join("/")}else 0===a.indexOf("./")&&(a=a.substring(2));if((n||p)&&o){for(c=a.split("/"),k=c.length;k>0;k-=1){if(d=c.slice(0,k).join("/"),n)for(l=n.length;l>0;l-=1)if(e=o[n.slice(0,l).join("/")],e&&(e=e[d])){f=e,h=k;break}if(f)break;!i&&p&&p[d]&&(i=p[d],j=k)}!f&&i&&(f=i,h=j),f&&(c.splice(0,h,f),a=c.join("/"))}return a}function g(a,b){return function(){return n.apply(d,v.call(arguments,0).concat([a,b]))}}function h(a){return function(b){return f(b,a)}}function i(a){return function(b){q[a]=b}}function j(a){if(e(r,a)){var b=r[a];delete r[a],t[a]=!0,m.apply(d,b)}if(!e(q,a)&&!e(t,a))throw new Error("No "+a);return q[a]}function k(a){var b,c=a?a.indexOf("!"):-1;return c>-1&&(b=a.substring(0,c),a=a.substring(c+1,a.length)),[b,a]}function l(a){return function(){return s&&s.config&&s.config[a]||{}}}var m,n,o,p,q={},r={},s={},t={},u=Object.prototype.hasOwnProperty,v=[].slice,w=/\.js$/;o=function(a,b){var c,d=k(a),e=d[0];return a=d[1],e&&(e=f(e,b),c=j(e)),e?a=c&&c.normalize?c.normalize(a,h(b)):f(a,b):(a=f(a,b),d=k(a),e=d[0],a=d[1],e&&(c=j(e))),{f:e?e+"!"+a:a,n:a,pr:e,p:c}},p={require:function(a){return g(a)},exports:function(a){var b=q[a];return"undefined"!=typeof b?b:q[a]={}},module:function(a){return{id:a,uri:"",exports:q[a],config:l(a)}}},m=function(a,b,c,f){var h,k,l,m,n,s,u=[],v=typeof c;if(f=f||a,"undefined"===v||"function"===v){for(b=!b.length&&c.length?["require","exports","module"]:b,n=0;n<b.length;n+=1)if(m=o(b[n],f),k=m.f,"require"===k)u[n]=p.require(a);else if("exports"===k)u[n]=p.exports(a),s=!0;else if("module"===k)h=u[n]=p.module(a);else if(e(q,k)||e(r,k)||e(t,k))u[n]=j(k);else{if(!m.p)throw new Error(a+" missing "+k);m.p.load(m.n,g(f,!0),i(k),{}),u[n]=q[k]}l=c?c.apply(q[a],u):void 0,a&&(h&&h.exports!==d&&h.exports!==q[a]?q[a]=h.exports:l===d&&s||(q[a]=l))}else a&&(q[a]=c)},a=b=n=function(a,b,c,e,f){if("string"==typeof a)return p[a]?p[a](b):j(o(a,b).f);if(!a.splice){if(s=a,s.deps&&n(s.deps,s.callback),!b)return;b.splice?(a=b,b=c,c=null):a=d}return b=b||function(){},"function"==typeof c&&(c=e,e=f),e?m(d,a,b,c):setTimeout(function(){m(d,a,b,c)},4),n},n.config=function(a){return n(a)},a._defined=q,c=function(a,b,c){b.splice||(c=b,b=[]),e(q,a)||e(r,a)||(r[a]=[a,b,c])},c.amd={jQuery:!0}}(),c("almond",function(){}),c("jquery",[],function(){return jQuery}),c("select2/utils",[],function(){function a(a){var b=a.prototype,c=[];for(var d in b){var e=b[d];"function"==typeof e&&c.push(d)}return c}var b={};b.Extend=function(a,b){function c(){this.constructor=a}var d={}.hasOwnProperty;for(var e in b)d.call(b,e)&&(a[e]=b[e]);return c.prototype=b.prototype,a.prototype=new c,a.__super__=b.prototype,a},b.Decorate=function(b,c){function d(){var a=Array.prototype.unshift,d=c.prototype.constructor.length,e=b.prototype.constructor;d>0&&(a.call(arguments,b.prototype.constructor),e=c.prototype.constructor),e.apply(this,arguments)}function e(){this.constructor=d}var f=a(c),g=a(b);c.displayName=b.displayName,d.prototype=new e;for(var h=0;h<g.length;h++){var i=g[h];d.prototype[i]=b.prototype[i]}for(var j=(function(a){var b=function(){};a in d.prototype&&(b=d.prototype[a]);var e=c.prototype[a];return function(){var a=Array.prototype.unshift;return a.call(arguments,b),e.apply(this,arguments)}}),k=0;k<f.length;k++){var l=f[k];d.prototype[l]=j(l)}return d};var c=function(){this.listeners={}};return c.prototype.on=function(a,b){a in this.listeners?this.listeners[a].push(b):this.listeners[a]=[b]},c.prototype.trigger=function(a){var b=Array.prototype.slice;a in this.listeners&&this.invoke(this.listeners[a],b.call(arguments,1)),"*"in this.listeners&&this.invoke(this.listeners["*"],arguments)},c.prototype.invoke=function(a,b){for(var c=0,d=a.length;d>c;c++)a[c].apply(this,b)},b.Observable=c,b.generateChars=function(a){for(var b="",c=0;a>c;c++){var d=Math.floor(36*Math.random());b+=d.toString(36)}return b},b}),c("select2/results",["./utils"],function(a){function b(a,c,d){this.$element=a,this.data=d,this.options=c,b.__super__.constructor.call(this)}return a.Extend(b,a.Observable),b.prototype.render=function(){var a=$('<ul class="options" role="tree"></ul>');return this.options.get("multiple")&&a.attr("aria-multiselectable","true"),this.$results=a,a},b.prototype.clear=function(){this.$results.empty()},b.prototype.empty=function(){var a=$('<li 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c=$('<strong class="group-label"></strong>');c.html(a.text);for(var d=[],e=0;e<a.children.length;e++){var f=a.children[e],g=this.option(f);d.push(g)}var h=$('<ul class="options nested-options"></ul>');h.append(d),b.append(c),b.append(h)}else b.html(a.text);return a.disabled&&b.removeAttr("aria-selected").attr("aria-disabled","true"),null==a.id&&b.removeAttr("aria-selected"),null!=a._resultId&&b.attr("id",a._resultId),b.data("data",a),b},b.prototype.bind=function(a){var 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b=d.showSearch(a);b?d.$searchContainer.show():d.$searchContainer.hide()}})},a.prototype.showSearch=function(){return!0},a}),c("select2/dropdown/hidePlaceholder",[],function(){function a(a,b,c,d){this.placeholder=this.normalizePlaceholder(c.get("placeholder")),a.call(this,b,c,d)}return a.prototype.append=function(a,b){b=this.removePlaceholder(b),a.call(this,b)},a.prototype.normalizePlaceholder=function(a,b){return"string"==typeof b&&(b={id:"",text:b}),b},a.prototype.removePlaceholder=function(a,b){for(var c=b.slice(0),d=b.length-1;d>=0;d--){var e=b[d];this.placeholder.id===e.id&&c.splice(d,1)}return c},a}),c("select2/i18n/en",[],function(){return{noResults:function(){return"No results found"}}}),c("select2/defaults",["jquery","./results","./selection/single","./selection/multiple","./selection/placeholder","./utils","./translation","./data/select","./data/array","./data/ajax","./data/tags","./dropdown","./dropdown/search","./dropdown/hidePlaceholder","./i18n/en"],function(a,b,c,d,e,f,g,h,i,j,k,l,m,n){function o(){this.reset()}o.prototype.apply=function(o){if(o=a.extend({},this.defaults,o),null==o.dataAdapter&&(o.dataAdapter=o.ajax?j:o.data?i:h),null!=o.tags&&(o.dataAdapter=f.Decorate(o.dataAdapter,k)),null==o.resultsAdapter&&(o.resultsAdapter=b,null!=o.placeholder&&(o.resultsAdapter=f.Decorate(o.resultsAdapter,n))),null==o.dropdownAdapter){var p=f.Decorate(l,m);o.dropdownAdapter=p}if(null==o.selectionAdapter&&(o.selectionAdapter=o.multiple?d:c,null!=o.placeholder&&(o.selectionAdapter=f.Decorate(o.selectionAdapter,e))),"string"==typeof o.language&&(o.language=[o.language]),a.isArray(o.language)){for(var q=new g,r=o.language.concat(this.defaults.language),s=0;s<r.length;s++){var t=r[s],u={};try{u=g.loadPath(t)}catch(v){t="select2/i18n/"+t,u=g.loadPath(t)}q.extend(u)}o.translations=q}else o.translations=new Translations(o.language);return o},o.prototype.reset=function(){this.defaults={language:["select2/i18n/en"]}};var p=new o;return p}),c("select2/options",["./defaults"],function(a){function b(b,c){this.options=b,null!=c&&this.fromElement(c),this.options=a.apply(this.options)}return b.prototype.fromElement=function(a){return null==this.options.multiple&&(this.options.multiple=a.prop("multiple")),this},b.prototype.get=function(a){return this.options[a]},b.prototype.set=function(a,b){this.options[a]=b},b}),c("select2/keys",[],function(){var a={BACKSPACE:8,TAB:9,ENTER:13,SHIFT:16,CTRL:17,ALT:18,ESC:27,SPACE:32,PAGE_UP:33,PAGE_DOWN:34,END:35,HOME:36,LEFT:37,UP:38,RIGHT:39,DOWN:40,DELETE:46,isArrow:function(a){switch(a=a.which?a.which:a){case KEY.LEFT:case KEY.RIGHT:case KEY.UP:case KEY.DOWN:return!0}return!1}};return a}),c("select2/core",["jquery","./options","./utils","./keys"],function(a,b,c,d){var e=function(a,c){this.$element=a,this.id=this._generateId(a),c=c||{},this.options=new b(c,a),e.__super__.constructor.call(this);var d=this.options.get("dataAdapter");this.data=new d(a,this.options);var f=this.render();this._placeContainer(f);var g=this.options.get("selectionAdapter");this.selection=new g(a,this.options);var h=this.selection.render();this._placeSelection(h);var i=this.options.get("dropdownAdapter");this.dropdown=new i(a,this.options);var j=this.dropdown.render();this._placeDropdown(j);var k=this.options.get("resultsAdapter");this.results=new k(a,this.options,this.data);var l=this.results.render();this._placeResults(l);var m=this;this._bindAdapters(),this._registerDomEvents(),this._registerSelectionEvents(),this._registerDropdownEvents(),this._registerResultsEvents(),this._registerEvents(),this.data.current(function(a){m.trigger("selection:update",{data:a})}),a.hide(),a.attr("tabindex","-1"),a.data("select2",this)};return c.Extend(e,c.Observable),e.prototype._generateId=function(a){var b="";return b=null!=a.attr("id")?a.attr("id"):null!=a.attr("name")?a.attr("name")+"-"+c.generateChars(2):c.generateChars(4),b="select2-"+b},e.prototype._placeContainer=function(a){a.insertAfter(this.$element),a.width(this.$element.outerWidth(!1))},e.prototype._placeSelection=function(a){var b=this.$container.find(".selection");b.append(a)},e.prototype._placeDropdown=function(a){this.$dropdown=a;var b=this.$container.find(".dropdown-wrapper");b.append(a)},e.prototype._placeResults=function(a){var b=this.$dropdown.find(".results");b.append(a)},e.prototype._bindAdapters=function(){this.data.bind(this,this.$container),this.selection.bind(this,this.$container),this.dropdown.bind(this,this.$container),this.results.bind(this,this.$container)},e.prototype._registerDomEvents=function(){var a=this;this.$element.on("change",function(){a.data.current(function(b){a.trigger("selection:update",{data:b})})})},e.prototype._registerSelectionEvents=function(){var a=this;this.selection.on("open",function(){a.open()}),this.selection.on("close",function(){a.close()}),this.selection.on("toggle",function(){a.toggleDropdown()}),this.selection.on("results:select",function(){a.trigger("results:select")}),this.selection.on("results:previous",function(){a.trigger("results:previous")}),this.selection.on("results:next",function(){a.trigger("results:next")}),this.selection.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.selection.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerDropdownEvents=function(){var a=this;this.dropdown.on("query",function(b){a.trigger("query",b)}),this.dropdown.on("keypress",function(b){a.trigger("keypress",b)})},e.prototype._registerResultsEvents=function(){var a=this;this.results.on("selected",function(b){a.trigger("select",b),a.close()}),this.results.on("unselected",function(b){a.trigger("unselect",b),a.close()}),this.results.on("results:focus",function(b){a.trigger("results:focus",b)})},e.prototype._registerEvents=function(){var a=this;this.on("open",function(){a.$container.addClass("open")}),this.on("close",function(){a.$container.removeClass("open")}),this.on("query",function(b){this.data.query(b,function(c){a.trigger("results:all",{data:c,query:b})})}),this.on("keypress",function(b){var c=b.which;a.isOpen()?c==d.ENTER?(a.trigger("results:select"),b.preventDefault()):c==d.UP?(a.trigger("results:previous"),b.preventDefault()):c==d.DOWN&&(a.trigger("results:next"),b.preventDefault()):(c==d.ENTER||c==d.SPACE)&&(a.trigger("open"),b.preventDefault())})},e.prototype.toggleDropdown=function(){this.isOpen()?this.close():this.open()},e.prototype.open=function(){this.isOpen()||(this.trigger("query",{}),this.trigger("open"))},e.prototype.close=function(){this.isOpen()&&this.trigger("close")},e.prototype.isOpen=function(){return this.$container.hasClass("open")},e.prototype.render=function(){var b=a('<span class="select2 select2-container select2-theme-default"><span class="selection"></span><span class="dropdown-wrapper" aria-hidden="true"></span></span>');return this.$container=b,b.data("element",this.$element),b},e}),c("jquery.select2",["jquery","select2/core"],function(a,b){return null==a.fn.select2&&(a.fn.select2=function(c){if(c=c||{},"object"==typeof c)this.each(function(){new b(a(this),c)});else{if("string"!=typeof c)throw new Error("Invalid arguments for Select2: "+c);var d=this.data("select2"),e=Array.prototype.slice.call(arguments,1);d[c](e)}}),b}),b("jquery.select2"),$.fn.select2.amd={define:c,require:b}}();
\ No newline at end of file
diff --git a/src/js/select2/core.js b/src/js/select2/core.js
index cfe7a480..7ee8d9b9 100644
--- a/src/js/select2/core.js
+++ b/src/js/select2/core.js
@@ -1,8 +1,9 @@
 define([
   'jquery',
   './options',
-  './utils'
-], function ($, Options, Utils) {
+  './utils',
+  './keys'
+], function ($, Options, Utils, KEYS) {
   var Select2 = function ($element, options) {
     this.$element = $element;
 
@@ -56,6 +57,7 @@ define([
 
     // Register any internal event handlers
     this._registerSelectionEvents();
+    this._registerDropdownEvents();
     this._registerResultsEvents();
     this._registerEvents();
 
@@ -67,8 +69,6 @@ define([
       });
     });
 
-    this.trigger('query', {});
-
     // Hide the original select
 
     $element.hide();
@@ -165,6 +165,22 @@ define([
 
       self.close();
     });
+
+    this.selection.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
+  };
+
+  Select2.prototype._registerDropdownEvents = function () {
+    var self = this;
+
+    this.dropdown.on('query', function (params) {
+      self.trigger('query', params);
+    });
+
+    this.dropdown.on('keypress', function (e) {
+      self.trigger('keypress', e);
+    });
   };
 
   Select2.prototype._registerResultsEvents = function () {
@@ -206,6 +222,32 @@ define([
         });
       });
     });
+
+    this.on('keypress', function (evt) {
+      var key = evt.which;
+
+      if (self.isOpen()) {
+        if (key == KEYS.ENTER) {
+          self.trigger('results:select');
+
+          evt.preventDefault();
+        } else if (key == KEYS.UP) {
+          self.trigger('results:previous');
+
+          evt.preventDefault();
+        } else if (key == KEYS.DOWN) {
+          self.trigger('results:next');
+
+          evt.preventDefault();
+        }
+      } else {
+        if (key == KEYS.ENTER || key == KEYS.SPACE) {
+          self.trigger('open');
+
+          evt.preventDefault();
+        }
+      }
+    });
   };
 
   Select2.prototype.toggleDropdown = function () {
@@ -221,6 +263,8 @@ define([
       return;
     }
 
+    this.trigger('query', {});
+
     this.trigger('open');
   };
 
diff --git a/src/js/select2/dropdown/search.js b/src/js/select2/dropdown/search.js
index a5c11d3c..9d7a81b8 100644
--- a/src/js/select2/dropdown/search.js
+++ b/src/js/select2/dropdown/search.js
@@ -1,6 +1,6 @@
 define([
-
-], function () {
+  '../utils'
+], function (Utils) {
   function Search () { }
 
   Search.prototype.render = function (decorated) {
@@ -25,8 +25,14 @@ define([
 
     decorated.call(this, container, $container);
 
-    this.$search.on('keyup', function () {
-      container.trigger('query', {
+    this.$search.on('keyup', function (evt) {
+      self.trigger('keypress', evt);
+
+      if (evt.isDefaultPrevented()) {
+        return;
+      }
+
+      self.trigger('query', {
         term: $(this).val()
       });
     });
@@ -37,6 +43,8 @@ define([
 
     container.on('close', function () {
       self.$search.attr('tabindex', -1);
+
+      self.$search.val('');
     });
 
     container.on('results:all', function (params) {
@@ -52,7 +60,7 @@ define([
     });
   };
 
-  Search.prototype.showSearch = function (params) {
+  Search.prototype.showSearch = function (_, params) {
     return true;
   };
 
diff --git a/src/js/select2/selection/single.js b/src/js/select2/selection/single.js
index a70d2816..13ec02ba 100644
--- a/src/js/select2/selection/single.js
+++ b/src/js/select2/selection/single.js
@@ -1,8 +1,7 @@
 define([
   './base',
-  '../utils',
-  '../keys'
-], function (BaseSelection, Utils, KEYS) {
+  '../utils'
+], function (BaseSelection, Utils) {
   function SingleSelection () {
     SingleSelection.__super__.constructor.apply(this, arguments);
   }
@@ -56,6 +55,8 @@ define([
       // When the dropdown is closed, aria-expanded="false"
       self.$selection.attr('aria-expanded', 'false');
       self.$selection.removeAttr('aria-activedescendant');
+
+      self.$selection.focus();
     });
 
     this.$selection.on('focus', function (evt) {
@@ -67,29 +68,7 @@ define([
     });
 
     this.$selection.on('keydown', function (evt) {
-      var key = evt.which;
-
-      if (container.isOpen()) {
-        if (key == KEYS.ENTER) {
-          self.trigger('results:select');
-
-          evt.preventDefault();
-        } else if (key == KEYS.UP) {
-          self.trigger('results:previous');
-
-          evt.preventDefault();
-        } else if (key == KEYS.DOWN) {
-          self.trigger('results:next');
-
-          evt.preventDefault();
-        }
-      } else {
-        if (key == KEYS.ENTER || key == KEYS.SPACE) {
-          self.trigger('open');
-
-          evt.preventDefault();
-        }
-      }
+      self.trigger('keypress', evt);
     });
 
     container.on('results:focus', function (params) {
diff --git a/src/js/select2/utils.js b/src/js/select2/utils.js
index 9ef1ae97..ee9abbcc 100644
--- a/src/js/select2/utils.js
+++ b/src/js/select2/utils.js
@@ -107,6 +107,8 @@ define([], function () {
   };
 
   Observable.prototype.on = function (event, callback) {
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.listeners[event].push(callback);
     } else {
@@ -117,6 +119,8 @@ define([], function () {
   Observable.prototype.trigger = function (event) {
     var slice = Array.prototype.slice;
 
+    this.listeners = this.listeners || {};
+
     if (event in this.listeners) {
       this.invoke(this.listeners[event], slice.call(arguments, 1));
     }