select2/dist/js/select2.js

window.$ = window.$ || {};(function() { if ($ && $.fn && $.fn.select2 && $.fn.select2.amd) { define = $.fn.select2.amd.define; require = $.fn.select2.amd.require; }/**
 * @license almond 0.2.9 Copyright (c) 2011-2014, The Dojo Foundation All Rights Reserved.
 * Available via the MIT or new BSD license.
 * see: http://github.com/jrburke/almond for details
 */
//Going sloppy to avoid 'use strict' string cost, but strict practices should
//be followed.
/*jslint sloppy: true */
/*global setTimeout: false */

var requirejs, require, define;
(function (undef) {
    var main, req, makeMap, handlers,
        defined = {},
        waiting = {},
        config = {},
        defining = {},
        hasOwn = Object.prototype.hasOwnProperty,
        aps = [].slice,
        jsSuffixRegExp = /\.js$/;

    function hasProp(obj, prop) {
        return hasOwn.call(obj, prop);
    }

    /**
     * Given a relative module name, like ./something, normalize it to
     * a real name that can be mapped to a path.
     * @param {String} name the relative name
     * @param {String} baseName a real name that the name arg is relative
     * to.
     * @returns {String} normalized name
     */
    function normalize(name, baseName) {
        var nameParts, nameSegment, mapValue, foundMap, lastIndex,
            foundI, foundStarMap, starI, i, j, part,
            baseParts = baseName && baseName.split("/"),
            map = config.map,
            starMap = (map && map['*']) || {};

        //Adjust any relative paths.
        if (name && name.charAt(0) === ".") {
            //If have a base name, try to normalize against it,
            //otherwise, assume it is a top-level require that will
            //be relative to baseUrl in the end.
            if (baseName) {
                //Convert baseName to array, and lop off the last part,
                //so that . matches that "directory" and not name of the baseName's
                //module. For instance, baseName of "one/two/three", maps to
                //"one/two/three.js", but we want the directory, "one/two" for
                //this normalization.
                baseParts = baseParts.slice(0, baseParts.length - 1);
                name = name.split('/');
                lastIndex = name.length - 1;

                // Node .js allowance:
                if (config.nodeIdCompat && jsSuffixRegExp.test(name[lastIndex])) {
                    name[lastIndex] = name[lastIndex].replace(jsSuffixRegExp, '');
                }

                name = baseParts.concat(name);

                //start trimDots
                for (i = 0; i < name.length; i += 1) {
                    part = name[i];
                    if (part === ".") {
                        name.splice(i, 1);
                        i -= 1;
                    } else if (part === "..") {
                        if (i === 1 && (name[2] === '..' || name[0] === '..')) {
                            //End of the line. Keep at least one non-dot
                            //path segment at the front so it can be mapped
                            //correctly to disk. Otherwise, there is likely
                            //no path mapping for a path starting with '..'.
                            //This can still fail, but catches the most reasonable
                            //uses of ..
                            break;
                        } else if (i > 0) {
                            name.splice(i - 1, 2);
                            i -= 2;
                        }
                    }
                }
                //end trimDots

                name = name.join("/");
            } else if (name.indexOf('./') === 0) {
                // No baseName, so this is ID is resolved relative
                // to baseUrl, pull off the leading dot.
                name = name.substring(2);
            }
        }

        //Apply map config if available.
        if ((baseParts || starMap) && map) {
            nameParts = name.split('/');

            for (i = nameParts.length; i > 0; i -= 1) {
                nameSegment = nameParts.slice(0, i).join("/");

                if (baseParts) {
                    //Find the longest baseName segment match in the config.
                    //So, do joins on the biggest to smallest lengths of baseParts.
                    for (j = baseParts.length; j > 0; j -= 1) {
                        mapValue = map[baseParts.slice(0, j).join('/')];

                        //baseName segment has  config, find if it has one for
                        //this name.
                        if (mapValue) {
                            mapValue = mapValue[nameSegment];
                            if (mapValue) {
                                //Match, update name to the new value.
                                foundMap = mapValue;
                                foundI = i;
                                break;
                            }
                        }
                    }
                }

                if (foundMap) {
                    break;
                }

                //Check for a star map match, but just hold on to it,
                //if there is a shorter segment match later in a matching
                //config, then favor over this star map.
                if (!foundStarMap && starMap && starMap[nameSegment]) {
                    foundStarMap = starMap[nameSegment];
                    starI = i;
                }
            }

            if (!foundMap && foundStarMap) {
                foundMap = foundStarMap;
                foundI = starI;
            }

            if (foundMap) {
                nameParts.splice(0, foundI, foundMap);
                name = nameParts.join('/');
            }
        }

        return name;
    }

    function makeRequire(relName, forceSync) {
        return function () {
            //A version of a require function that passes a moduleName
            //value for items that may need to
            //look up paths relative to the moduleName
            return req.apply(undef, aps.call(arguments, 0).concat([relName, forceSync]));
        };
    }

    function makeNormalize(relName) {
        return function (name) {
            return normalize(name, relName);
        };
    }

    function makeLoad(depName) {
        return function (value) {
            defined[depName] = value;
        };
    }

    function callDep(name) {
        if (hasProp(waiting, name)) {
            var args = waiting[name];
            delete waiting[name];
            defining[name] = true;
            main.apply(undef, args);
        }

        if (!hasProp(defined, name) && !hasProp(defining, name)) {
            throw new Error('No ' + name);
        }
        return defined[name];
    }

    //Turns a plugin!resource to [plugin, resource]
    //with the plugin being undefined if the name
    //did not have a plugin prefix.
    function splitPrefix(name) {
        var prefix,
            index = name ? name.indexOf('!') : -1;
        if (index > -1) {
            prefix = name.substring(0, index);
            name = name.substring(index + 1, name.length);
        }
        return [prefix, name];
    }

    /**
     * Makes a name map, normalizing the name, and using a plugin
     * for normalization if necessary. Grabs a ref to plugin
     * too, as an optimization.
     */
    makeMap = function (name, relName) {
        var plugin,
            parts = splitPrefix(name),
            prefix = parts[0];

        name = parts[1];

        if (prefix) {
            prefix = normalize(prefix, relName);
            plugin = callDep(prefix);
        }

        //Normalize according
        if (prefix) {
            if (plugin && plugin.normalize) {
                name = plugin.normalize(name, makeNormalize(relName));
            } else {
                name = normalize(name, relName);
            }
        } else {
            name = normalize(name, relName);
            parts = splitPrefix(name);
            prefix = parts[0];
            name = parts[1];
            if (prefix) {
                plugin = callDep(prefix);
            }
        }

        //Using ridiculous property names for space reasons
        return {
            f: prefix ? prefix + '!' + name : name, //fullName
            n: name,
            pr: prefix,
            p: plugin
        };
    };

    function makeConfig(name) {
        return function () {
            return (config && config.config && config.config[name]) || {};
        };
    }

    handlers = {
        require: function (name) {
            return makeRequire(name);
        },
        exports: function (name) {
            var e = defined[name];
            if (typeof e !== 'undefined') {
                return e;
            } else {
                return (defined[name] = {});
            }
        },
        module: function (name) {
            return {
                id: name,
                uri: '',
                exports: defined[name],
                config: makeConfig(name)
            };
        }
    };

    main = function (name, deps, callback, relName) {
        var cjsModule, depName, ret, map, i,
            args = [],
            callbackType = typeof callback,
            usingExports;

        //Use name if no relName
        relName = relName || name;

        //Call the callback to define the module, if necessary.
        if (callbackType === 'undefined' || callbackType === 'function') {
            //Pull out the defined dependencies and pass the ordered
            //values to the callback.
            //Default to [require, exports, module] if no deps
            deps = !deps.length && callback.length ? ['require', 'exports', 'module'] : deps;
            for (i = 0; i < deps.length; i += 1) {
                map = makeMap(deps[i], relName);
                depName = map.f;

                //Fast path CommonJS standard dependencies.
                if (depName === "require") {
                    args[i] = handlers.require(name);
                } else if (depName === "exports") {
                    //CommonJS module spec 1.1
                    args[i] = handlers.exports(name);
                    usingExports = true;
                } else if (depName === "module") {
                    //CommonJS module spec 1.1
                    cjsModule = args[i] = handlers.module(name);
                } else if (hasProp(defined, depName) ||
                           hasProp(waiting, depName) ||
                           hasProp(defining, depName)) {
                    args[i] = callDep(depName);
                } else if (map.p) {
                    map.p.load(map.n, makeRequire(relName, true), makeLoad(depName), {});
                    args[i] = defined[depName];
                } else {
                    throw new Error(name + ' missing ' + depName);
                }
            }

            ret = callback ? callback.apply(defined[name], args) : undefined;

            if (name) {
                //If setting exports via "module" is in play,
                //favor that over return value and exports. After that,
                //favor a non-undefined return value over exports use.
                if (cjsModule && cjsModule.exports !== undef &&
                        cjsModule.exports !== defined[name]) {
                    defined[name] = cjsModule.exports;
                } else if (ret !== undef || !usingExports) {
                    //Use the return value from the function.
                    defined[name] = ret;
                }
            }
        } else if (name) {
            //May just be an object definition for the module. Only
            //worry about defining if have a module name.
            defined[name] = callback;
        }
    };

    requirejs = require = req = function (deps, callback, relName, forceSync, alt) {
        if (typeof deps === "string") {
            if (handlers[deps]) {
                //callback in this case is really relName
                return handlers[deps](callback);
            }
            //Just return the module wanted. In this scenario, the
            //deps arg is the module name, and second arg (if passed)
            //is just the relName.
            //Normalize module name, if it contains . or ..
            return callDep(makeMap(deps, callback).f);
        } else if (!deps.splice) {
            //deps is a config object, not an array.
            config = deps;
            if (config.deps) {
                req(config.deps, config.callback);
            }
            if (!callback) {
                return;
            }

            if (callback.splice) {
                //callback is an array, which means it is a dependency list.
                //Adjust args if there are dependencies
                deps = callback;
                callback = relName;
                relName = null;
            } else {
                deps = undef;
            }
        }

        //Support require(['a'])
        callback = callback || function () {};

        //If relName is a function, it is an errback handler,
        //so remove it.
        if (typeof relName === 'function') {
            relName = forceSync;
            forceSync = alt;
        }

        //Simulate async callback;
        if (forceSync) {
            main(undef, deps, callback, relName);
        } else {
            //Using a non-zero value because of concern for what old browsers
            //do, and latest browsers "upgrade" to 4 if lower value is used:
            //http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#dom-windowtimers-settimeout:
            //If want a value immediately, use require('id') instead -- something
            //that works in almond on the global level, but not guaranteed and
            //unlikely to work in other AMD implementations.
            setTimeout(function () {
                main(undef, deps, callback, relName);
            }, 4);
        }

        return req;
    };

    /**
     * Just drops the config on the floor, but returns req in case
     * the config return value is used.
     */
    req.config = function (cfg) {
        return req(cfg);
    };

    /**
     * Expose module registry for debugging and tooling
     */
    requirejs._defined = defined;

    define = function (name, deps, callback) {

        //This module may not have dependencies
        if (!deps.splice) {
            //deps is not an array, so probably means
            //an object literal or factory function for
            //the value. Adjust args.
            callback = deps;
            deps = [];
        }

        if (!hasProp(defined, name) && !hasProp(waiting, name)) {
            waiting[name] = [name, deps, callback];
        }
    };

    define.amd = {
        jQuery: true
    };
}());

define("almond", function(){});

define('jquery',[],function () {
    return jQuery;
});

define('select2/utils',[], function () {
  var Utils = {};

  Utils.Extend = function (ChildClass, SuperClass) {
    var __hasProp = {}.hasOwnProperty;

    function BaseConstructor () {
      this.constructor = ChildClass;
    }

    for (var key in SuperClass) {
      if (__hasProp.call(SuperClass, key)) {
        ChildClass[key] = SuperClass[key];
      }
    }

    BaseConstructor.prototype = SuperClass.prototype;
    ChildClass.prototype = new BaseConstructor();
    ChildClass.__super__ = SuperClass.prototype;

    return ChildClass;
  };

  function getMethods (theClass) {
    var proto = theClass.prototype;

    var methods = [];

    for (var methodName in proto) {
      var m = proto[methodName];

      if (typeof m !== 'function') {
        continue;
      }

      methods.push(methodName);
    }

    return methods;
  }

  Utils.Decorate = function (SuperClass, DecoratorClass) {
    var decoratedMethods = getMethods(DecoratorClass);
    var superMethods = getMethods(SuperClass);

    function DecoratedClass () {
      var unshift = Array.prototype.unshift;

      var argCount = DecoratorClass.prototype.constructor.length;

      var calledConstructor = SuperClass.prototype.constructor;

      if (argCount > 0) {
        unshift.call(arguments, SuperClass.prototype.constructor);

        calledConstructor = DecoratorClass.prototype.constructor;
      }

      calledConstructor.apply(this, arguments);
    }

    DecoratorClass.displayName = SuperClass.displayName;

    function ctr () {
      this.constructor = DecoratedClass;
    }

    DecoratedClass.prototype = new ctr();

    for (var m = 0; m < superMethods.length; m++) {
        var superMethod = superMethods[m];

        DecoratedClass.prototype[superMethod] =
          SuperClass.prototype[superMethod];
    }

    var calledMethod = function (methodName) {
      // Stub out the original method if it's not decorating an actual method
      var originalMethod = function () {};

      if (methodName in DecoratedClass.prototype) {
        originalMethod = DecoratedClass.prototype[methodName];
      }

      var decoratedMethod = DecoratorClass.prototype[methodName];

      return function () {
        var unshift = Array.prototype.unshift;

        unshift.call(arguments, originalMethod);

        return decoratedMethod.apply(this, arguments);
      };
    };

    for (var d = 0; d < decoratedMethods.length; d++) {
      var decoratedMethod = decoratedMethods[d];

      DecoratedClass.prototype[decoratedMethod] = calledMethod(decoratedMethod);
    }

    return DecoratedClass;
  };

  var Observable = function () {
    this.listeners = {};
  };

  Observable.prototype.on = function (event, callback) {
    this.listeners = this.listeners || {};

    if (event in this.listeners) {
      this.listeners[event].push(callback);
    } else {
      this.listeners[event] = [callback];
    }
  };

  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));
    }

    if ('*' in this.listeners) {
      this.invoke(this.listeners['*'], arguments);
    }
  };

  Observable.prototype.invoke = function (listeners, params) {
    for (var i = 0, len = listeners.length; i < len; i++) {
      listeners[i].apply(this, params);
    }
  };

  Utils.Observable = Observable;

  Utils.generateChars = function (length) {
    var chars = '';

    for (var i = 0; i < length; i++) {
      var randomChar = Math.floor(Math.random() * 36);
      chars += randomChar.toString(36);
    }

    return chars;
  };

  return Utils;
});

define('select2/results',[
  './utils'
], function (Utils) {
  function Results ($element, options, dataAdapter) {
    this.$element = $element;
    this.data = dataAdapter;
    this.options = options;

    Results.__super__.constructor.call(this);
  }

  Utils.Extend(Results, Utils.Observable);

  Results.prototype.render = function () {
    var $results = $(
      '<ul class="options" role="tree"></ul>'
    );

    if (this.options.get('multiple')) {
      $results.attr('aria-multiselectable', 'true');
    }

    this.$results = $results;

    return $results;
  };

  Results.prototype.clear = function () {
    this.$results.empty();
  };

  Results.prototype.displayMessage = function (params) {
    this.clear();

    var $message = $('<li role="treeitem" class="option"></li>');

    var message = this.options.get('translations').get(params.message);

    $message.text(message(params.args));

    this.$results.append($message);
  };

  Results.prototype.append = function (data) {
    var $options = [];

    if (data.length === 0) {
      if (this.$results.children().length === 0) {
        this.trigger('results:message', {
          message: 'noResults'
        });
      }

      return;
    }

    data = this.sort(data);

    for (var d = 0; d < data.length; d++) {
      var item = data[d];

      var $option = this.option(item);

      $options.push($option);
    }

    this.$results.append($options);
  };

  Results.prototype.sort = function (data) {
    return data;
  };

  Results.prototype.setClasses = function () {
    var self = this;

    this.data.current(function (selected) {
      var selectedIds = $.map(selected, function (s) {
        return s.id.toString();
      });

      var $options = self.$results.find('.option[aria-selected]');

      $options.each(function () {
        var $option = $(this);
        var item = $option.data('data');

        if (item.id != null && selectedIds.indexOf(item.id.toString()) > -1) {
          $option.attr('aria-selected', 'true');
        } else {
          $option.attr('aria-selected', 'false');
        }
      });

      var $selected = $options.filter('[aria-selected=true]');

      // Check if there are any selected options
      if ($selected.length > 0) {
        // If there are selected options, highlight the first
        $selected.first().trigger('mouseenter');
      } else {
        // If there are no selected options, highlight the first option
        // in the dropdown
        $options.first().trigger('mouseenter');
      }
    });
  };

  Results.prototype.option = function (data) {
    var $option = $(
      '<li class="option" role="treeitem" aria-selected="false"></li>'
    );

    if (data.children) {
      $option
        .attr('role', 'group')
        .attr('aria-label', data.text)
        .removeAttr('aria-selected');

      var $label = $('<strong class="group-label"></strong>');
      this.template(data, $label);

      var $children = [];

      for (var c = 0; c < data.children.length; c++) {
        var child = data.children[c];

        var $child = this.option(child);

        $children.push($child);
      }

      var $childrenContainer = $('<ul class="options nested-options"></ul>');

      $childrenContainer.append($children);

      $option.append($label);
      $option.append($childrenContainer);
    } else {
      this.template(data, $option);
    }

    if (data.disabled) {
      $option
        .removeAttr('aria-selected')
        .attr('aria-disabled', 'true');
    }

    if (data.id == null) {
      $option.removeAttr('aria-selected');
    }

    if (data._resultId != null) {
      $option.attr('id', data._resultId);
    }

    $option.data('data', data);

    return $option;
  };

  Results.prototype.bind = function (container, $container) {
    var self = this;

    var id = container.id + '-results';

    this.$results.attr('id', id);

    container.on('results:all', function (params) {
      self.clear();
      self.append(params.data);

      if (container.isOpen()) {
        self.setClasses();
      }
    });

    container.on('results:append', function (params) {
      self.append(params.data);

      if (container.isOpen()) {
        self.setClasses();
      }
    });

    container.on('select', function () {
      if (!container.isOpen()) {
        return;
      }

      self.setClasses();
    });

    container.on('unselect', function () {
      if (!container.isOpen()) {
        return;
      }

      self.setClasses();
    });

    container.on('open', function () {
      // When the dropdown is open, aria-expended="true"
      self.$results.attr('aria-expanded', 'true');
      self.$results.attr('aria-hidden', 'false');

      self.setClasses();
      self.ensureHighlightVisible();
    });

    container.on('close', function () {
      // When the dropdown is closed, aria-expended="false"
      self.$results.attr('aria-expanded', 'false');
      self.$results.attr('aria-hidden', 'true');
      self.$results.removeAttr('aria-activedescendant');
    });

    container.on('results:select', function () {
      var $highlighted = self.$results.find('.highlighted');

      if ($highlighted.length === 0) {
        return;
      }

      var data = $highlighted.data('data');

      if ($highlighted.attr('aria-selected') == 'true') {
        self.trigger('unselected', {
          data: data
        });
      } else {
        self.trigger('selected', {
          data: data
        });
      }
    });

    container.on('results:previous', function () {
      var $highlighted = self.$results.find('.highlighted');

      var $options = self.$results.find('[aria-selected]');

      var currentIndex = $options.index($highlighted);

      // If we are already at te top, don't move further
      if (currentIndex === 0) {
        return;
      }

      var nextIndex = currentIndex - 1;

      // If none are highlighted, highlight the first
      if ($highlighted.length === 0) {
        nextIndex = 0;
      }

      var $next = $options.eq(nextIndex);

      $next.trigger('mouseenter');

      var currentOffset = self.$results.offset().top;
      var nextTop = $next.offset().top;
      var nextOffset = self.$results.scrollTop() + (nextTop - currentOffset);

      if (nextIndex === 0) {
        self.$results.scrollTop(0);
      } else if (nextTop - currentOffset < 0) {
        self.$results.scrollTop(nextOffset);
      }
    });

    container.on('results:next', function () {
      var $highlighted = self.$results.find('.highlighted');

      var $options = self.$results.find('[aria-selected]');

      var currentIndex = $options.index($highlighted);

      var nextIndex = currentIndex + 1;

      // If we are at the last option, stay there
      if (nextIndex >= $options.length) {
        return;
      }

      var $next = $options.eq(nextIndex);

      $next.trigger('mouseenter');

      var currentOffset = self.$results.offset().top +
        self.$results.outerHeight(false);
      var nextBottom = $next.offset().top + $next.outerHeight(false);
      var nextOffset = self.$results.scrollTop() + nextBottom - currentOffset;

      if (nextIndex === 0) {
        self.$results.scrollTop(0);
      } else if (nextBottom > currentOffset) {
        self.$results.scrollTop(nextOffset);
      }
    });

    container.on('results:focus', function (params) {
      params.element.addClass('highlighted');
    });

    container.on('results:message', function (params) {
      self.trigger('results:message', params);
    });

    this.on('results:message', function (params) {
      self.displayMessage(params);
    });

    this.$results.on('mouseup', '.option[aria-selected]', function (evt) {
      var $this = $(this);

      var data = $this.data('data');

      if ($this.attr('aria-selected') === 'true') {
        self.trigger('unselected', {
          originalEvent: evt,
          data: data
        });

        return;
      }

      self.trigger('selected', {
        originalEvent: evt,
        data: data
      });
    });

    this.$results.on('mouseenter', '.option[aria-selected]', function (evt) {
      var data = $(this).data('data');

      self.$results.find('.option.highlighted').removeClass('highlighted');

      self.trigger('results:focus', {
        data: data,
        element: $(this)
      });
    });

    this.$results.on('mouseleave', '.option', function (evt) {
      if ($(this).hasClass('highlighted')) {
        $(this).removeClass('highlighted');
        self.$results.removeAttr('aria-activedescendant');
      }
    });
  };

  Results.prototype.ensureHighlightVisible = function () {
    var $highlighted = this.$results.find('.highlighted');

    if ($highlighted.length === 0) {
      return;
    }

    var $options = this.$results.find('[aria-selected]');

    var currentIndex = $options.index($highlighted);

    var currentOffset = this.$results.offset().top;
    var nextTop = $highlighted.offset().top;
    var nextOffset = this.$results.scrollTop() + (nextTop - currentOffset);

    var offsetDelta = nextTop - currentOffset;
    nextOffset -= $highlighted.outerHeight(false) * 2;

    if (currentIndex <= 2) {
      this.$results.scrollTop(0);
    } else if (offsetDelta > this.$results.outerHeight() || offsetDelta < 0) {
      this.$results.scrollTop(nextOffset);
    }
  };

  Results.prototype.template = function (result, $container) {
    var template = this.options.get('templateResult');

    $container.html(template(result));
  };

  return Results;
});

define('select2/selection/base',[
  '../utils'
], function (Utils) {
  function BaseSelection ($element, options) {
    this.$element = $element;
    this.options = options;

    BaseSelection.__super__.constructor.call(this);
  }

  Utils.Extend(BaseSelection, Utils.Observable);

  BaseSelection.prototype.render = function () {
    throw new Error('The `render` method must be defined in child classes.');
  };

  BaseSelection.prototype.bind = function (container, $container) {
    var self = this;

    container.on('selection:update', function (params) {
      self.update(params.data);
    });

    container.on('open', function () {
      $(document.body).on('mousedown.select2.' + container.id, function (e) {
        var $target = $(e.target);

        var $select = $target.closest('.select2');

        var $all = $('.select2.open');

        $all.each(function () {
          var $this = $(this);

          if (this == $select[0]) {
            return;
          }

          var $element = $this.data('element');

          $element.select2('close');
        });
      });

      container.on('close', function () {
        $(document.body).off('mousedown.select2.' + container.id);
      });
    });
  };

  BaseSelection.prototype.update = function (data) {
    throw new Error('The `update` method must be defined in child classes.');
  };

  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) {
  function SingleSelection () {
    SingleSelection.__super__.constructor.apply(this, arguments);
  }

  Utils.Extend(SingleSelection, BaseSelection);

  SingleSelection.prototype.render = function () {
    var $selection = $(
      '<span class="single-select" tabindex="0" role="combobox" ' +
        'aria-autocomplete="list" aria-haspopup="true" aria-expanded="false">' +
        '<span class="rendered-selection"></span>' +
      '</span>'
    );

    $selection.attr('title', this.$element.attr('title'));

    this.$selection = $selection;

    return $selection;
  };

  SingleSelection.prototype.bind = function (container, $container) {
    var self = this;

    SingleSelection.__super__.bind.apply(this, arguments);

    var id = container.id + '-container';
    var resultsId = container.id + '-results';

    this.$selection.find('.rendered-selection').attr('id', id);
    this.$selection.attr('aria-labelledby', id);
    this.$selection.attr('aria-owns', resultsId);

    this.$selection.on('mousedown', function (evt) {
      // Only respond to left clicks
      if (evt.which !== 1) {
        return;
      }

      self.trigger('toggle', {
        originalEvent: evt
      });
    });

    container.on('open', function () {
      // When the dropdown is open, aria-expanded="true"
      self.$selection.attr('aria-expanded', 'true');
    });

    container.on('close', function () {
      // 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) {
      // User focuses on the container
    });

    this.$selection.on('blur', function (evt) {
      // User exits the container
    });

    this.$selection.on('keydown', function (evt) {
      self.trigger('keypress', evt);

      if (evt.which === KEYS.SPACE) {
        evt.preventDefault();
      }
    });

    container.on('results:focus', function (params) {
      self.$selection.attr('aria-activedescendant', params.data._resultId);
    });

    container.on('selection:update', function (params) {
      self.update(params.data);
    });
  };

  SingleSelection.prototype.clear = function () {
    this.$selection.find('.rendered-selection').empty();
  };

  SingleSelection.prototype.display = function (data) {
    var template = this.options.get('templateSelection');

    return template(data);
  };

  SingleSelection.prototype.selectionContainer = function () {
    return $('<span></span>');
  };

  SingleSelection.prototype.update = function (data) {
    if (data.length === 0) {
      this.clear();
      return;
    }

    var selection = data[0];

    var formatted = this.display(selection);

    this.$selection.find('.rendered-selection').html(formatted);
  };

  return SingleSelection;
});

define('select2/selection/multiple',[
  './base',
  '../utils'
], function (BaseSelection, Utils) {
  function MultipleSelection ($element, options) {
    MultipleSelection.__super__.constructor.apply(this, arguments);
  }

  Utils.Extend(MultipleSelection, BaseSelection);

  MultipleSelection.prototype.render = function () {
    var $selection = $(
      '<span class="multiple-select">' +
        '<ul class="rendered-selection"></ul>' +
      '</span>'
    );

    this.$selection = $selection;

    return $selection;
  };

  MultipleSelection.prototype.bind = function (container, $container) {
    var self = this;

    MultipleSelection.__super__.bind.apply(this, arguments);

    this.$selection.on('click', function (evt) {
      self.trigger('toggle', {
        originalEvent: evt
      });
    });

    this.$selection.on('click', '.remove', function (evt) {
      var $remove = $(this);
      var $selection = $remove.parent();

      var data = $selection.data('data');

      self.trigger('unselected', {
        originalEvent: evt,
        data: data
      });
    });
  };

  MultipleSelection.prototype.clear = function () {
    this.$selection.find('.rendered-selection').empty();
  };

  MultipleSelection.prototype.display = function (data) {
    var template = this.options.get('templateSelection');

    return template(data);
  };

  MultipleSelection.prototype.selectionContainer = function () {
    var $container = $(
      '<li class="choice">' +
        '<span class="remove" role="presentation">&times;</span>' +
      '</li>'
    );

    return $container;
  };

  MultipleSelection.prototype.update = function (data) {
    this.clear();

    if (data.length === 0) {
      return;
    }

    var $selections = [];

    for (var d = 0; d < data.length; d++) {
      var selection = data[d];

      var formatted = this.display(selection);
      var $selection = this.selectionContainer();

      $selection.append(formatted);
      $selection.data('data', selection);

      $selections.push($selection);
    }

    this.$selection.find('.rendered-selection').append($selections);
  };

  return MultipleSelection;
});

define('select2/selection/placeholder',[
  '../utils'
], function (Utils) {
  function Placeholder (decorated, $element, options) {
    this.placeholder = this.normalizePlaceholder(options.get('placeholder'));

    decorated.call(this, $element, options);
  }

  Placeholder.prototype.normalizePlaceholder = function (_, placeholder) {
    if (typeof placeholder === 'string') {
      placeholder = {
        id: '',
        text: placeholder
      };
    }

    return placeholder;
  };

  Placeholder.prototype.update = function (decorated, data) {
    var singlePlaceholder = (
      data.length == 1 && data[0].id != this.placeholder.id
    );
    var multipleSelections = data.length > 1;

    if (multipleSelections || singlePlaceholder) {
      return decorated.call(this, data);
    }

    this.clear();

    var $placeholder = this.selectionContainer();

    $placeholder.html(this.display(this.placeholder));
    $placeholder.addClass('placeholder').removeClass('choice');

    this.$selection.find('.rendered-selection').append($placeholder);
  };

  return Placeholder;
});

define('select2/translation',[

], function () {
  function Translation (dict) {
    this.dict = dict || {};
  }

  Translation.prototype.all = function () {
    return this.dict;
  };

  Translation.prototype.get = function (key) {
    return this.dict[key];
  };

  Translation.prototype.extend = function (translation) {
    this.dict = $.extend({}, translation.all(), this.dict);
  };

  // Static functions

  Translation._cache = {};

  Translation.loadPath = function (path) {
    if (!(path in Translation._cache)) {
      var translations = require(path);

      Translation._cache[path] = translations;
    }

    return new Translation(Translation._cache[path]);
  };

  return Translation;
});

define('select2/data/base',[
  '../utils'
], function (Utils) {
  function BaseAdapter ($element, options) {
    BaseAdapter.__super__.constructor.call(this);
  }

  Utils.Extend(BaseAdapter, Utils.Observable);

  BaseAdapter.prototype.current = function (callback) {
    throw new Error('The `current` method must be defined in child classes.');
  };

  BaseAdapter.prototype.query = function (params, callback) {
    throw new Error('The `query` method must be defined in child classes.');
  };

  BaseAdapter.prototype.bind = function (container, $container) {
    // Can be implemented in subclasses
  };

  BaseAdapter.prototype.generateResultId = function (container, data) {
    var id = container.id + '-result-';

    id += Utils.generateChars(4);

    if (data.id != null) {
      id += '-' + data.id.toString();
    } else {
      id += '-' + Utils.generateChars(4);
    }
    return id;
  };

  return BaseAdapter;
});

define('select2/data/select',[
  './base',
  '../utils',
  'jquery'
], function (BaseAdapter, Utils, $) {
  function SelectAdapter ($element, options) {
    this.$element = $element;
    this.options = options;

    SelectAdapter.__super__.constructor.call(this);
  }

  Utils.Extend(SelectAdapter, BaseAdapter);

  SelectAdapter.prototype.current = function (callback) {
    var data = [];
    var self = this;

    this.$element.find(':selected').each(function () {
      var $option = $(this);

      var option = self.item($option);

      data.push(option);
    });

    callback(data);
  };

  SelectAdapter.prototype.select = function (data) {
    var self = this;

    if (this.$element.prop('multiple')) {
      this.current(function (currentData) {
        var val = [];

        data = [data];
        data.push.apply(data, currentData);

        for (var d = 0; d < data.length; d++) {
          id = data[d].id;

          if (val.indexOf(id) === -1) {
            val.push(id);
          }
        }

        self.$element.val(val);
        self.$element.trigger('change');
      });
    } else {
      var val = data.id;

      this.$element.val(val);

      this.$element.trigger('change');
    }
  };

  SelectAdapter.prototype.unselect = function (data) {
    var self = this;

    if (!this.$element.prop('multiple')) {
      return;
    }

    this.current(function (currentData) {
      var val = [];

      for (var d = 0; d < currentData.length; d++) {
        id = currentData[d].id;

        if (id !== data.id && val.indexOf(id) === -1) {
          val.push(id);
        }
      }

      self.$element.val(val);

      self.$element.trigger('change');
    });
  };

  SelectAdapter.prototype.bind = function (container, $container) {
    var self = this;

    this.container = container;

    container.on('select', function (params) {
      self.select(params.data);
    });

    container.on('unselect', function (params) {
      self.unselect(params.data);
    });
  };

  SelectAdapter.prototype.query = function (params, callback) {
    var data = [];
    var self = this;

    var $options = this.$element.children();

    $options.each(function () {
      var $option = $(this);

      if (!$option.is('option') && !$option.is('optgroup')) {
        return;
      }

      var option = self.item($option);

      var matches = self.matches(params, option);

      if (matches !== null) {
        data.push(matches);
      }
    });

    callback(data);
  };

  SelectAdapter.prototype.option = function (data) {
    var $option = $('<option></option>');

    $option.text(data.text);
    $option.val(data.id);
    $option.prop('disabled', data.disabled || false);

    // Get any automatically generated data values
    var detectedData = this.item($option);

    // Merge it with the already present data
    var combinedData = $.extend({}, data, detectedData);

    // Override the option's data with the combined data
    $option.data('data', combinedData);

    return $option;
  };

  SelectAdapter.prototype.item = function ($option) {
    var data = $option.data('data');

    // If the data has already be generated, use it
    if (data == null) {
      if ($option.is('option')) {
        data = {
          id: $option.val(),
          text: $option.html(),
          disabled: $option.prop('disabled')
        };
      } else if ($option.is('optgroup')) {
        data = {
          text: $option.attr('label'),
          children: []
        };

        var $children = $option.children('option');
        var children = [];

        for (var c = 0; c < $children.length; c++) {
          var $child = $($children[c]);

          var child = this.item($child);

          children.push(child);
        }

        data.children = children;
      }

      if (data.id && this.container != null) {
        data._resultId = this.generateResultId(this.container, data);
      }

      $option.data('data', data);
    }

    return data;
  };

  SelectAdapter.prototype.matches = function (params, data) {
    var matcher = this.options.get('matcher');

    return matcher(params, data);
  };

  return SelectAdapter;
});

define('select2/data/array',[
  './select',
  '../utils',
  'jquery'
], function (SelectAdapter, Utils, $) {
  function ArrayAdapter ($element, options) {
    this.data = options.get('data');

    ArrayAdapter.__super__.constructor.call(this, $element, options);
  }

  Utils.Extend(ArrayAdapter, SelectAdapter);

  ArrayAdapter.prototype.select = function (data) {
    var self = this;

    this.$element.find('option').each(function () {
      var $option = $(this);
      var option = self.item($option);

      if (option.id == data.id.toString()) {
        $option.remove();
      }
    });

    var $option = this.option(data);

    this.$element.append($option);

    ArrayAdapter.__super__.select.call(this, data);
  };

  ArrayAdapter.prototype.query = function (params, callback) {
    var matches = [];
    var self = this;

    $.each(this.data, function () {
      var option = this;

      if (self.matches(params, option)) {
        matches.push(option);
      }
    });

    callback(matches);
  };

  return ArrayAdapter;
});

define('select2/data/ajax',[
  './array',
  '../utils',
  'jquery'
], function (ArrayAdapter, Utils, $) {
  function AjaxAdapter ($element, options) {
    this.ajaxOptions = options.get('ajax');

    if (this.ajaxOptions.processResults != null) {
      this.processResults = this.ajaxOptions.processResults;
    }

    ArrayAdapter.__super__.constructor.call(this, $element, options);
  }

  Utils.Extend(AjaxAdapter, ArrayAdapter);

  AjaxAdapter.prototype.processResults = function (results) {
    return results;
  };

  AjaxAdapter.prototype.query = function (params, callback) {
    var matches = [];
    var self = this;

    var options = $.extend({
      type: 'GET'
    }, this.ajaxOptions);

    if (typeof options.url === 'function') {
      options.url = options.url(params);
    }

    if (typeof options.data === 'function') {
      options.data = options.data(params);
    }

    function request () {
      var $request = $.ajax(options);

      $request.success(function (data) {
        var results = self.processResults(data);

        callback(results);
      });
    }

    if (this.ajaxOptions.delay && params.term !== '') {
      if (this._queryTimeout) {
        window.clearTimeout(this._queryTimeout);
      }

      this._queryTimeout = window.setTimeout(request, this.ajaxOptions.delay);
    } else {
      request();
    }
  };

  return AjaxAdapter;
});

define('select2/data/tags',[

], function () {
  function Tags (decorated, $element, options) {
    var tags = options.get('tags');

    decorated.call(this, $element, options);
  }

  Tags.prototype.query = function (decorated, params, callback) {
    var self = this;

    this._removeOldTags();

    if (params.term == null || params.term === '' || params.page != null) {
      decorated.call(this, params, callback);
      return;
    }

    function wrapper (data, child) {
      for (var i = 0; i < data.length; i++) {
        var option = data[i];

        var checkChildren = (
          option.children != null && !wrapper(option.children, true)
        );

        var checkText = option.text === params.term;

        if (checkText || checkChildren) {
          if (child) {
            return false;
          }

          callback(data);

          return;
        }
      }

      if (child) {
        return true;
      }

      var tag = self.createTag(params);

      var $option = self.option(tag);
      $option.attr('data-select2-tag', true);

      self.$element.append($option);

      self.insertTag(data, tag);

      callback(data);
    }

    decorated.call(this, params, wrapper);
  };

  Tags.prototype.createTag = function (decorated, params) {
    return {
      id: params.term,
      text: params.term
    };
  };

  Tags.prototype.insertTag = function (_, data, tag) {
    data.unshift(tag);
  };

  Tags.prototype._removeOldTags = function (_) {
    var tag = this._lastTag;

    var $options = this.$element.find('option[data-select2-tag]');

    $options.each(function () {
      if (this.selected) {
        return;
      }

      $(this).remove();
    });
  };

  return Tags;
});

define('select2/data/minimumInputLength',[

], function () {
  function MinimumInputLength (decorated, $e, options) {
    this.minimumInputLength = options.get('minimumInputLength');

    decorated.call(this, $e, options);
  }

  MinimumInputLength.prototype.query = function (decorated, params, callback) {
    params.term = params.term || '';

    if (params.term.length < this.minimumInputLength) {
      this.trigger('results:message', {
        message: 'inputTooShort',
        args: {
          minimum: this.minimumInputLength,
          input: params.term,
          params: params
        }
      });

      return;
    }

    decorated.call(this, params, callback);
  };

  return MinimumInputLength;
});

define('select2/dropdown',[
  './utils'
], function (Utils) {
  function Dropdown ($element, options) {
    this.$element = $element;
  }

  Utils.Extend(Dropdown, Utils.Observable);

  Dropdown.prototype.render = function () {
    var $dropdown = $(
      '<span class="dropdown">' +
        '<span class="results"></span>' +
      '</span>'
    );

    return $dropdown;
  };

  Dropdown.prototype.bind = function (container, $container) {
    // Can be implemented in subclasses
  };

  return Dropdown;
});

define('select2/dropdown/search',[
  '../utils'
], function (Utils) {
  function Search () { }

  Search.prototype.render = function (decorated) {
    var $rendered = decorated.call(this);

    var $search = $(
      '<span class="search">' +
        '<input type="search" name="search" tabindex="-1" role="textbox" />' +
      '</span>'
    );

    this.$searchContainer = $search;
    this.$search = $search.find('input');

    $rendered.prepend($search);

    return $rendered;
  };

  Search.prototype.bind = function (decorated, container, $container) {
    var self = this;

    decorated.call(this, container, $container);

    this.$search.on('keydown', function (evt) {
      self.trigger('keypress', evt);

      self._keyUpPrevented = evt.isDefaultPrevented();
    });

    this.$search.on('keyup', function (evt) {
      self.handleSearch(evt);
    });

    container.on('open', function () {
      self.$search.attr('tabindex', 0);
    });

    container.on('close', function () {
      self.$search.attr('tabindex', -1);

      self.$search.val('');
    });

    container.on('results:all', function (params) {
      if (params.query.term == null || params.query.term === '') {
        var showSearch = self.showSearch(params);

        if (showSearch) {
          self.$searchContainer.show();
        } else {
          self.$searchContainer.hide();
        }
      }
    });
  };

  Search.prototype.handleSearch = function (evt) {
    if (!this._keyUpPrevented) {
      var input = this.$search.val();

      this.trigger('query', {
        term: input
      });
    }

    this._keyUpPrevented = false;
  };

  Search.prototype.showSearch = function (_, params) {
    return true;
  };

  return Search;
});

define('select2/dropdown/hidePlaceholder',[

], function () {
  function HidePlaceholder (decorated, $element, options, dataAdapter) {
    this.placeholder = this.normalizePlaceholder(options.get('placeholder'));

    decorated.call(this, $element, options, dataAdapter);
  }

  HidePlaceholder.prototype.append = function (decorated, data) {
    data = this.removePlaceholder(data);

    decorated.call(this, data);
  };

  HidePlaceholder.prototype.normalizePlaceholder = function (_, placeholder) {
    if (typeof placeholder === 'string') {
      placeholder = {
        id: '',
        text: placeholder
      };
    }

    return placeholder;
  };

  HidePlaceholder.prototype.removePlaceholder = function (_, data) {
    var modifiedData = data.slice(0);

    for (var d = data.length - 1; d >= 0; d--) {
      var item = data[d];

      if (this.placeholder.id === item.id) {
        modifiedData.splice(d, 1);
      }
    }

    return modifiedData;
  };

  return HidePlaceholder;
});

define('select2/dropdown/infiniteScroll',[
  'jquery'
], function ($) {
  function InfiniteScroll (decorated, $element, options, dataAdapter) {
    this.lastParams = {};

    decorated.call(this, $element, options, dataAdapter);

    this.$loadingMore = this.createLoadingMore();
    this.loading = false;
  }

  InfiniteScroll.prototype.append = function (decorated, data) {
    this.$loadingMore.remove();

    decorated.call(this, data);

    if (data.length > 0) {
      this.$results.append(this.$loadingMore);
    }

    this.loading = false;
  };

  InfiniteScroll.prototype.bind = function (decorated, container, $container) {
    var self = this;

    decorated.call(this, container, $container);

    container.on('query', function (params) {
      self.lastParams = params;
      self.loading = true;
    });

    container.on('query:append', function (params) {
      self.lastParams = params;
      self.loading = true;
    });

    this.$results.on('scroll', function () {
      var loadMoreVisible = $.contains(
        document.documentElement,
        self.$loadingMore[0]
      );

      if (self.loading || !loadMoreVisible) {
        return;
      }

      var currentOffset = self.$results.offset().top +
        self.$results.outerHeight(false);
      var loadingMoreOffset = self.$loadingMore.offset().top +
        self.$loadingMore.outerHeight(false);

      if (currentOffset + 50 >= loadingMoreOffset) {
        self.loadMore();
      }
    });
  };

  InfiniteScroll.prototype.loadMore = function () {
    this.loading = true;

    var params = $.extend({}, {page: 1}, this.lastParams);

    params.page++;

    this.trigger('query:append', params);
  };

  InfiniteScroll.prototype.createLoadingMore = function () {
    var $option = $(
      '<li class="option load-more" role="treeitem"></li>'
    );

    var message = this.options.get('translations').get('loadingMore');

    $option.html(message(this.lastParams));

    return $option;
  };

  return InfiniteScroll;
});

define('select2/i18n/en',[],function () {
  return {
    inputTooShort: function (args) {
      var remainingChars = args.minimum - args.input.length;

      var message = 'Please enter ' + remainingChars + ' or more character';

      if (remainingChars != 1) {
        message += 's';
      }

      return message;
    },
    loadingMore: function () {
      return 'Loading more results…';
    },
    noResults: function () {
      return 'No results found';
    }
  };
});

define('select2/defaults',[
  'jquery',
  './results',

  './selection/single',
  './selection/multiple',
  './selection/placeholder',

  './utils',
  './translation',

  './data/select',
  './data/array',
  './data/ajax',
  './data/tags',
  './data/minimumInputLength',

  './dropdown',
  './dropdown/search',
  './dropdown/hidePlaceholder',
  './dropdown/infiniteScroll',

  './i18n/en'
], function ($, ResultsList,
             SingleSelection, MultipleSelection, Placeholder,
             Utils, Translation,
             SelectData, ArrayData, AjaxData, Tags, MinimumInputLength,
             Dropdown, Search, HidePlaceholder, InfiniteScroll,
             EnglishTranslation) {
  function Defaults () {
    this.reset();
  }

  Defaults.prototype.apply = function (options) {
    options = $.extend({}, this.defaults, options);

    if (options.dataAdapter == null) {
      if (options.ajax != null) {
        options.dataAdapter = AjaxData;
      } else if (options.data != null) {
        options.dataAdapter = ArrayData;
      } else {
        options.dataAdapter = SelectData;
      }
    }


    if (options.minimumInputLength > 0) {
      options.dataAdapter = Utils.Decorate(
        options.dataAdapter,
        MinimumInputLength
      );
    }

    if (options.tags != null) {
      options.dataAdapter = Utils.Decorate(options.dataAdapter, Tags);
    }

    if (options.resultsAdapter == null) {
      options.resultsAdapter = ResultsList;

      if (options.ajax != null) {
        options.resultsAdapter = Utils.Decorate(
          options.resultsAdapter,
          InfiniteScroll
        );
      }

      if (options.placeholder != null) {
        options.resultsAdapter = Utils.Decorate(
          options.resultsAdapter,
          HidePlaceholder
        );
      }
    }

    if (options.dropdownAdapter == null) {
      var SearchableDropdown = Utils.Decorate(Dropdown, Search);

      options.dropdownAdapter = SearchableDropdown;
    }

    if (options.selectionAdapter == null) {
      if (options.multiple) {
        options.selectionAdapter = MultipleSelection;
      } else {
        options.selectionAdapter = SingleSelection;
      }

      // Add the placeholder mixin if a placeholder was specified
      if (options.placeholder != null) {
        options.selectionAdapter = Utils.Decorate(
          options.selectionAdapter,
          Placeholder
        );
      }
    }

    if (typeof options.language === 'string') {
      options.language = [options.language];
    }

    if ($.isArray(options.language)) {
      var languages = new Translation();
      var languageNames = options.language.concat(this.defaults.language);

      for (var l = 0; l < languageNames.length; l++) {
        var name = languageNames[l];
        var language = {};

        try {
          // Try to load it with the original name
          language = Translation.loadPath(name);
        } catch (e) {
          // If we couldn't load it, check if it wasn't the full path
          name = 'select2/i18n/' + name;
          language = Translation.loadPath(name);
        }

        languages.extend(language);
      }

      options.translations = languages;
    } else {
      options.translations = new Translations(options.language);
    }

    return options;
  };

  Defaults.prototype.reset = function () {
    function matcher (params, data) {
      var match = $.extend(true, {}, data);

      if (data.children) {
        for (var c = data.children.length - 1; c >= 0; c--) {
          var child = data.children[c];

          var matches = matcher(params, child);

          // If there wasn't a match, remove the object in the array
          if (matches === null) {
            match.children.splice(c, 1);
          }
        }

        if (match.children.length > 0) {
          return match;
        }
      }

      if ($.trim(params.term) === '') {
        return match;
      }

      if (data.text.toUpperCase().indexOf(params.term.toUpperCase()) > -1) {
        return match;
      }

      return null;
    }

    this.defaults = {
      language: ['select2/i18n/en'],
      matcher: matcher,
      minimumInputLength: 0,
      templateResult: function (result) {
        return result.text;
      },
      templateSelection: function (selection) {
        return selection.text;
      }
    };
  };

  var defaults = new Defaults();

  return defaults;
});

define('select2/options',[
  './defaults'
], function (Defaults) {
  function Options (options, $element) {
    this.options = options;

    if ($element != null) {
      this.fromElement($element);
    }

    this.options = Defaults.apply(this.options);
  }

  Options.prototype.fromElement = function ($e) {
    if (this.options.multiple == null) {
      this.options.multiple = $e.prop('multiple');
    }

    return this;
  };

  Options.prototype.get = function (key) {
    return this.options[key];
  };

  Options.prototype.set = function (key, val) {
    this.options[key] = val;
  };

  return Options;
});

define('select2/core',[
  'jquery',
  './options',
  './utils',
  './keys'
], function ($, Options, Utils, KEYS) {
  var Select2 = function ($element, options) {
    this.$element = $element;

    this.id = this._generateId($element);

    options = options || {};

    this.options = new Options(options, $element);

    Select2.__super__.constructor.call(this);

    // Set up containers and adapters

    var DataAdapter = this.options.get('dataAdapter');
    this.data = new DataAdapter($element, this.options);

    var $container = this.render();

    this._placeContainer($container);

    var SelectionAdapter = this.options.get('selectionAdapter');
    this.selection = new SelectionAdapter($element, this.options);

    var $selection = this.selection.render();

    this._placeSelection($selection);

    var DropdownAdapter = this.options.get('dropdownAdapter');
    this.dropdown = new DropdownAdapter($element, this.options);

    var $dropdown = this.dropdown.render();

    this._placeDropdown($dropdown);

    var ResultsAdapter = this.options.get('resultsAdapter');
    this.results = new ResultsAdapter($element, this.options, this.data);

    var $results = this.results.render();

    this._placeResults($results);

    // Bind events

    var self = this;

    // Bind the container to all of the adapters
    this._bindAdapters();

    // Register any DOM event handlers
    this._registerDomEvents();

    // Register any internal event handlers
    this._registerDataEvents();
    this._registerSelectionEvents();
    this._registerDropdownEvents();
    this._registerResultsEvents();
    this._registerEvents();

    // Set the initial state

    this.data.current(function (initialData) {
      self.trigger('selection:update', {
        data: initialData
      });
    });

    // Hide the original select

    $element.hide();
    $element.attr('tabindex', '-1');

    $element.data('select2', this);
  };

  Utils.Extend(Select2, Utils.Observable);

  Select2.prototype._generateId = function ($element) {
    var id = '';

    if ($element.attr('id') != null) {
      id = $element.attr('id');
    } else if ($element.attr('name') != null) {
      id = $element.attr('name') + '-' + Utils.generateChars(2);
    } else {
      id = Utils.generateChars(4);
    }

    id = 'select2-' + id;

    return id;
  };

  Select2.prototype._placeContainer = function ($container) {
    $container.insertAfter(this.$element);
    $container.width(this.$element.outerWidth(false));
  };

  Select2.prototype._placeSelection = function ($selection) {
    var $selectionContainer = this.$container.find('.selection');
    $selectionContainer.append($selection);
  };

  Select2.prototype._placeDropdown = function ($dropdown) {
    this.$dropdown = $dropdown;

    var $dropdownContainer = this.$container.find('.dropdown-wrapper');
    $dropdownContainer.append($dropdown);
  };

  Select2.prototype._placeResults = function ($results) {
    var $resultsContainer = this.$dropdown.find('.results');
    $resultsContainer.append($results);
  };

  Select2.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);
  };

  Select2.prototype._registerDomEvents = function () {
    var self = this;

    this.$element.on('change', function () {
      self.data.current(function (data) {
        self.trigger('selection:update', {
          data: data
        });
      });
    });
  };

  Select2.prototype._registerDataEvents = function () {
    var self = this;

    this.data.on('results:message', function (params) {
      self.trigger('results:message', params);
    });
  };

  Select2.prototype._registerSelectionEvents = function () {
    var self = this;

    this.selection.on('open', function () {
      self.open();
    });
    this.selection.on('close', function () {
      self.close();
    });
    this.selection.on('toggle', function () {
      self.toggleDropdown();
    });

    this.selection.on('results:select', function () {
      self.trigger('results:select');
    });
    this.selection.on('results:previous', function () {
      self.trigger('results:previous');
    });
    this.selection.on('results:next', function () {
      self.trigger('results:next');
    });

    this.selection.on('unselected', function (params) {
      self.trigger('unselect', params);

      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 () {
    var self = this;

    this.results.on('query:append', function (params) {
      self.trigger('query:append', params);
    });

    this.results.on('selected', function (params) {
      self.trigger('select', params);

      self.close();
    });

    this.results.on('unselected', function (params) {
      self.trigger('unselect', params);

      self.close();
    });

    this.results.on('results:focus', function (params) {
      self.trigger('results:focus', params);
    });
  };

  Select2.prototype._registerEvents = function () {
    var self = this;

    this.on('open', function () {
      self.$container.addClass('open');
    });

    this.on('close', function () {
      self.$container.removeClass('open');
    });

    this.on('query', function (params) {
      this.data.query(params, function (data) {
        self.trigger('results:all', {
          data: data,
          query: params
        });
      });
    });

    this.on('query:append', function (params) {
      this.data.query(params, function (data) {
        self.trigger('results:append', {
          data: data,
          query: params
        });
      });
    });

    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.ESC || key === KEYS.TAB) {
          self.close();

          evt.preventDefault();
        }
      } else {
        if (key === KEYS.ENTER || key === KEYS.SPACE) {
          self.open();

          evt.preventDefault();
        }
      }
    });
  };

  Select2.prototype.toggleDropdown = function () {
    if (this.isOpen()) {
      this.close();
    } else {
      this.open();
    }
  };

  Select2.prototype.open = function () {
    if (this.isOpen()) {
      return;
    }

    this.trigger('query', {});

    this.trigger('open');
  };

  Select2.prototype.close = function () {
    if (!this.isOpen()) {
      return;
    }

    this.trigger('close');
  };

  Select2.prototype.isOpen = function () {
    return this.$container.hasClass('open');
  };

  Select2.prototype.render = function () {
    var $container = $(
      '<span class="select2 select2-container select2-theme-default">' +
        '<span class="selection"></span>' +
        '<span class="dropdown-wrapper" aria-hidden="true"></span>' +
      '</span>'
    );

    this.$container = $container;

    $container.data('element', this.$element);

    return $container;
  };

  return Select2;
});

define('jquery.select2',[
  'jquery',
  'select2/core'
], function ($, Select2) {
  if ($.fn.select2 == null) {
    $.fn.select2 = function (options) {
      options = options || {};

      if (typeof options === 'object') {
        this.each(function () {
          var instance = new Select2($(this), options);
        });
      } else if (typeof options === 'string') {
        var instance = this.data('select2');
        var args = Array.prototype.slice.call(arguments, 1);

        instance[options](args);
      } else {
        throw new Error('Invalid arguments for Select2: ' + options);
      }
    };
  }

  return Select2;
});

require('jquery.select2'); $.fn.select2.amd = { define: define, require: require };}());