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Code Editor : achosen.jquery.js

/*!
Chosen, a Select Box Enhancer for jQuery and Prototype
by Patrick Filler for Harvest, http://getharvest.com

Version 1.1.0
Full source at https://github.com/harvesthq/chosen
Copyright (c) 2011 Harvest http://getharvest.com

MIT License, https://github.com/harvesthq/chosen/blob/master/LICENSE.md
This file is generated by `grunt build`, do not edit it by hand.
*/

SelectParser = (function() {
    function SelectParser() {
      this.options_index = 0;
      this.parsed = [];
    }

SelectParser.prototype.add_node = function(child) {
      if (child.nodeName.toUpperCase() === "OPTGROUP") {
        return this.add_group(child);
      } else {
        return this.add_option(child);
      }
    };

SelectParser.prototype.add_group = function(group) {
      var group_position, option, _i, _len, _ref, _results;
      group_position = this.parsed.length;
      this.parsed.push({
        array_index: group_position,
        group: true,
        label: this.escapeExpression(group.label),
        children: 0,
        disabled: group.disabled
      });
      _ref = group.childNodes;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        option = _ref[_i];
        _results.push(this.add_option(option, group_position, group.disabled));
      }
      return _results;
    };

SelectParser.prototype.add_option = function(option, group_position, group_disabled) {
      if (option.nodeName.toUpperCase() === "OPTION") {
        if (option.text !== "") {
          if (group_position != null) {
            this.parsed[group_position].children += 1;
          }
          this.parsed.push({
            array_index: this.parsed.length,
            options_index: this.options_index,
            value: option.value,
            text: option.text,
            html: option.innerHTML,
            selected: option.selected,
            disabled: group_disabled === true ? group_disabled : option.disabled,
            group_array_index: group_position,
            classes: option.className,
            style: option.style.cssText
          });
        } else {
          this.parsed.push({
            array_index: this.parsed.length,
            options_index: this.options_index,
            empty: true
          });
        }
        return this.options_index += 1;
      }
    };

SelectParser.prototype.escapeExpression = function(text) {
      var map, unsafe_chars;
      if ((text == null) || text === false) {
        return "";
      }
      if (!/[\&\<\>\"\'\`]/.test(text)) {
        return text;
      }
      map = {
        "<": "&lt;",
        ">": "&gt;",
        '"': "&quot;",
        "'": "&#x27;",
        "`": "&#x60;"
      };
      unsafe_chars = /&(?!\w+;)|[\<\>\"\'\`]/g;
      return text.replace(unsafe_chars, function(chr) {
        return map[chr] || "&amp;";
      });
    };

return SelectParser;

})();

SelectParser.select_to_array = function(select) {
    var child, parser, _i, _len, _ref;
    parser = new SelectParser();
    _ref = select.childNodes;
    for (_i = 0, _len = _ref.length; _i < _len; _i++) {
      child = _ref[_i];
      parser.add_node(child);
    }
    return parser.parsed;
  };

AbstractChosen = (function() {
    function AbstractChosen(form_field, options) {
      this.form_field = form_field;
      this.options = options != null ? options : {};
      if (!AbstractChosen.browser_is_supported()) {
        return;
      }
      this.is_multiple = this.form_field.multiple;
      this.set_default_text();
      this.set_default_values();
      this.setup();
      this.set_up_html();
      this.register_observers();
    }

AbstractChosen.prototype.set_default_values = function() {
      var _this = this;
      this.click_test_action = function(evt) {
        return _this.test_active_click(evt);
      };
      this.activate_action = function(evt) {
        return _this.activate_field(evt);
      };
      this.active_field = false;
      this.mouse_on_container = false;
      this.results_showing = false;
      this.result_highlighted = null;
      this.allow_single_deselect = (this.options.allow_single_deselect != null) && (this.form_field.options[0] != null) && this.form_field.options[0].text === "" ? this.options.allow_single_deselect : false;
      this.disable_search_threshold = this.options.disable_search_threshold || 0;
      this.disable_search = this.options.disable_search || false;
      this.enable_split_word_search = this.options.enable_split_word_search != null ? this.options.enable_split_word_search : true;
      this.group_search = this.options.group_search != null ? this.options.group_search : true;
      this.search_contains = this.options.search_contains || false;
      this.single_backstroke_delete = this.options.single_backstroke_delete != null ? this.options.single_backstroke_delete : true;
      this.max_selected_options = this.options.max_selected_options || Infinity;
      this.inherit_select_classes = this.options.inherit_select_classes || false;
      this.display_selected_options = this.options.display_selected_options != null ? this.options.display_selected_options : true;
      return this.display_disabled_options = this.options.display_disabled_options != null ? this.options.display_disabled_options : true;
    };

AbstractChosen.prototype.set_default_text = function() {
      if (this.form_field.getAttribute("data-placeholder")) {
        this.default_text = this.form_field.getAttribute("data-placeholder");
      } else if (this.is_multiple) {
        this.default_text = this.options.placeholder_text_multiple || this.options.placeholder_text || AbstractChosen.default_multiple_text;
      } else {
        this.default_text = this.options.placeholder_text_single || this.options.placeholder_text || AbstractChosen.default_single_text;
      }
      return this.results_none_found = this.form_field.getAttribute("data-no_results_text") || this.options.no_results_text || AbstractChosen.default_no_result_text;
    };

AbstractChosen.prototype.mouse_enter = function() {
      return this.mouse_on_container = true;
    };

AbstractChosen.prototype.mouse_leave = function() {
      return this.mouse_on_container = false;
    };

AbstractChosen.prototype.input_focus = function(evt) {
      var _this = this;
      if (this.is_multiple) {
        if (!this.active_field) {
          return setTimeout((function() {
            return _this.container_mousedown();
          }), 50);
        }
      } else {
        if (!this.active_field) {
          return this.activate_field();
        }
      }
    };

AbstractChosen.prototype.input_blur = function(evt) {
      var _this = this;
      if (!this.mouse_on_container) {
        this.active_field = false;
        return setTimeout((function() {
          return _this.blur_test();
        }), 100);
      }
    };

AbstractChosen.prototype.results_option_build = function(options) {
      var content, data, _i, _len, _ref;
      content = '';
      _ref = this.results_data;
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        data = _ref[_i];
        if (data.group) {
          content += this.result_add_group(data);
        } else {
          content += this.result_add_option(data);
        }
        if (options != null ? options.first : void 0) {
          if (data.selected && this.is_multiple) {
            this.choice_build(data);
          } else if (data.selected && !this.is_multiple) {
            this.single_set_selected_text(data.text);
          }
        }
      }
      return content;
    };

AbstractChosen.prototype.result_add_option = function(option) {
      var classes, option_el;
      if (!option.search_match) {
        return '';
      }
      if (!this.include_option_in_results(option)) {
        return '';
      }
      classes = [];
      if (!option.disabled && !(option.selected && this.is_multiple)) {
        classes.push("active-result");
      }
      if (option.disabled && !(option.selected && this.is_multiple)) {
        classes.push("disabled-result");
      }
      if (option.selected) {
        classes.push("result-selected");
      }
      if (option.group_array_index != null) {
        classes.push("group-option");
      }
      if (option.classes !== "") {
        classes.push(option.classes);
      }
      option_el = document.createElement("li");
      option_el.className = classes.join(" ");
      option_el.style.cssText = option.style;
      option_el.setAttribute("data-option-array-index", option.array_index);
      option_el.innerHTML = option.search_text;
      return this.outerHTML(option_el);
    };

AbstractChosen.prototype.result_add_group = function(group) {
      var group_el;
      if (!(group.search_match || group.group_match)) {
        return '';
      }
      if (!(group.active_options > 0)) {
        return '';
      }
      group_el = document.createElement("li");
      group_el.className = "group-result";
      group_el.innerHTML = group.search_text;
      return this.outerHTML(group_el);
    };

AbstractChosen.prototype.results_update_field = function() {
      this.set_default_text();
      if (!this.is_multiple) {
        this.results_reset_cleanup();
      }
      this.result_clear_highlight();
      this.results_build();
      if (this.results_showing) {
        return this.winnow_results();
      }
    };

AbstractChosen.prototype.reset_single_select_options = function() {
      var result, _i, _len, _ref, _results;
      _ref = this.results_data;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        result = _ref[_i];
        if (result.selected) {
          _results.push(result.selected = false);
        } else {
          _results.push(void 0);
        }
      }
      return _results;
    };

AbstractChosen.prototype.results_toggle = function() {
      if (this.results_showing) {
        return this.results_hide();
      } else {
        return this.results_show();
      }
    };

AbstractChosen.prototype.results_search = function(evt) {
      if (this.results_showing) {
        return this.winnow_results();
      } else {
        return this.results_show();
      }
    };

AbstractChosen.prototype.winnow_results = function() {
      var escapedSearchText, option, regex, regexAnchor, results, results_group, searchText, startpos, text, zregex, _i, _len, _ref;
      this.no_results_clear();
      results = 0;
      searchText = this.get_search_text();
      escapedSearchText = searchText.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
      regexAnchor = this.search_contains ? "" : "^";
      regex = new RegExp(regexAnchor + escapedSearchText, 'i');
      zregex = new RegExp(escapedSearchText, 'i');
      _ref = this.results_data;
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        option = _ref[_i];
        option.search_match = false;
        results_group = null;
        if (this.include_option_in_results(option)) {
          if (option.group) {
            option.group_match = false;
            option.active_options = 0;
          }
          if ((option.group_array_index != null) && this.results_data[option.group_array_index]) {
            results_group = this.results_data[option.group_array_index];
            if (results_group.active_options === 0 && results_group.search_match) {
              results += 1;
            }
            results_group.active_options += 1;
          }
          if (!(option.group && !this.group_search)) {
            option.search_text = option.group ? option.label : option.html;
            option.search_match = this.search_string_match(option.search_text, regex);
            if (option.search_match && !option.group) {
              results += 1;
            }
            if (option.search_match) {
              if (searchText.length) {
                startpos = option.search_text.search(zregex);
                text = option.search_text.substr(0, startpos + searchText.length) + '</em>' + option.search_text.substr(startpos + searchText.length);
                option.search_text = text.substr(0, startpos) + '<em>' + text.substr(startpos);
              }
              if (results_group != null) {
                results_group.group_match = true;
              }
            } else if ((option.group_array_index != null) && this.results_data[option.group_array_index].search_match) {
              option.search_match = true;
            }
          }
        }
      }
      this.result_clear_highlight();
      if (results < 1 && searchText.length) {
        this.update_results_content("");
        return this.no_results(searchText);
      } else {
        this.update_results_content(this.results_option_build());
        return this.winnow_results_set_highlight();
      }
    };

AbstractChosen.prototype.search_string_match = function(search_string, regex) {
      var part, parts, _i, _len;
      if (regex.test(search_string)) {
        return true;
      } else if (this.enable_split_word_search && (search_string.indexOf(" ") >= 0 || search_string.indexOf("[") === 0)) {
        parts = search_string.replace(/\[|\]/g, "").split(" ");
        if (parts.length) {
          for (_i = 0, _len = parts.length; _i < _len; _i++) {
            part = parts[_i];
            if (regex.test(part)) {
              return true;
            }
          }
        }
      }
    };

AbstractChosen.prototype.choices_count = function() {
      var option, _i, _len, _ref;
      if (this.selected_option_count != null) {
        return this.selected_option_count;
      }
      this.selected_option_count = 0;
      _ref = this.form_field.options;
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        option = _ref[_i];
        if (option.selected) {
          this.selected_option_count += 1;
        }
      }
      return this.selected_option_count;
    };

AbstractChosen.prototype.choices_click = function(evt) {
      evt.preventDefault();
      if (!(this.results_showing || this.is_disabled)) {
        return this.results_show();
      }
    };

AbstractChosen.prototype.keyup_checker = function(evt) {
      var stroke, _ref;
      stroke = (_ref = evt.which) != null ? _ref : evt.keyCode;
      this.search_field_scale();
      switch (stroke) {
        case 8:
          if (this.is_multiple && this.backstroke_length < 1 && this.choices_count() > 0) {
            return this.keydown_backstroke();
          } else if (!this.pending_backstroke) {
            this.result_clear_highlight();
            return this.results_search();
          }
          break;
        case 13:
          evt.preventDefault();
          if (this.results_showing) {
            return this.result_select(evt);
          }
          break;
        case 27:
          if (this.results_showing) {
            this.results_hide();
          }
          return true;
        case 9:
        case 38:
        case 40:
        case 16:
        case 91:
        case 17:
          break;
        default:
          return this.results_search();
      }
    };

AbstractChosen.prototype.clipboard_event_checker = function(evt) {
      var _this = this;
      return setTimeout((function() {
        return _this.results_search();
      }), 50);
    };

AbstractChosen.prototype.container_width = function() {
      if (this.options.width != null) {
        return this.options.width;
      } else {
        return "" + this.form_field.offsetWidth + "px";
      }
    };

AbstractChosen.prototype.include_option_in_results = function(option) {
      if (this.is_multiple && (!this.display_selected_options && option.selected)) {
        return false;
      }
      if (!this.display_disabled_options && option.disabled) {
        return false;
      }
      if (option.empty) {
        return false;
      }
      return true;
    };

AbstractChosen.prototype.search_results_touchstart = function(evt) {
      this.touch_started = true;
      return this.search_results_mouseover(evt);
    };

AbstractChosen.prototype.search_results_touchmove = function(evt) {
      this.touch_started = false;
      return this.search_results_mouseout(evt);
    };

AbstractChosen.prototype.search_results_touchend = function(evt) {
      if (this.touch_started) {
        return this.search_results_mouseup(evt);
      }
    };

AbstractChosen.prototype.outerHTML = function(element) {
      var tmp;
      if (element.outerHTML) {
        return element.outerHTML;
      }
      tmp = document.createElement("div");
      tmp.appendChild(element);
      return tmp.innerHTML;
    };

AbstractChosen.browser_is_supported = function() {
      if (window.navigator.appName === "Microsoft Internet Explorer") {
        return document.documentMode >= 8;
      }
      if (/iP(od|hone)/i.test(window.navigator.userAgent)) {
        return false;
      }
      if (/Android/i.test(window.navigator.userAgent)) {
        if (/Mobile/i.test(window.navigator.userAgent)) {
          return false;
        }
      }
      return true;
    };

AbstractChosen.default_multiple_text = "Select Some Options";

AbstractChosen.default_single_text = "Select an Option";

AbstractChosen.default_no_result_text = "No results match";

return AbstractChosen;

})();

$ = jQuery;

$.fn.extend({
    chosen: function(options) {
      if (!AbstractChosen.browser_is_supported()) {
        return this;
      }
      return this.each(function(input_field) {
        var $this, chosen;
        $this = $(this);
        chosen = $this.data('chosen');
        if (options === 'destroy' && chosen) {
          chosen.destroy();
        } else if (!chosen) {
          $this.data('chosen', new Chosen(this, options));
        }
      });
    }
  });

Chosen = (function(_super) {
    __extends(Chosen, _super);

function Chosen() {
      _ref = Chosen.__super__.constructor.apply(this, arguments);
      return _ref;
    }

Chosen.prototype.setup = function() {
      this.form_field_jq = $(this.form_field);
      this.current_selectedIndex = this.form_field.selectedIndex;
      return this.is_rtl = this.form_field_jq.hasClass("chosen-rtl");
    };

Chosen.prototype.set_up_html = function() {
      var container_classes, container_props;
      container_classes = ["chosen-container"];
      container_classes.push("chosen-container-" + (this.is_multiple ? "multi" : "single"));
      if (this.inherit_select_classes && this.form_field.className) {
        container_classes.push(this.form_field.className);
      }
      if (this.is_rtl) {
        container_classes.push("chosen-rtl");
      }
      container_props = {
        'class': container_classes.join(' '),
        'style': "width: " + (this.container_width()) + ";",
        'title': this.form_field.title
      };
      if (this.form_field.id.length) {
        container_props.id = this.form_field.id.replace(/[^\w]/g, '_') + "_chosen";
      }
      this.container = $("<div />", container_props);
      if (this.is_multiple) {
        this.container.html('<ul class="chosen-choices"><li class="search-field"><input type="text" value="' + this.default_text + '" class="default" autocomplete="off" style="width:25px;" /></li></ul><div class="chosen-drop"><ul class="chosen-results"></ul></div>');
      } else {
        this.container.html('<a class="chosen-single chosen-default" tabindex="-1"><span>' + this.default_text + '</span><div><b></b></div></a><div class="chosen-drop"><div class="chosen-search"><input type="text" autocomplete="off" /></div><ul class="chosen-results"></ul></div>');
      }
      this.form_field_jq.hide().after(this.container);
      this.dropdown = this.container.find('div.chosen-drop').first();
      this.search_field = this.container.find('input').first();
      this.search_results = this.container.find('ul.chosen-results').first();
      this.search_field_scale();
      this.search_no_results = this.container.find('li.no-results').first();
      if (this.is_multiple) {
        this.search_choices = this.container.find('ul.chosen-choices').first();
        this.search_container = this.container.find('li.search-field').first();
      } else {
        this.search_container = this.container.find('div.chosen-search').first();
        this.selected_item = this.container.find('.chosen-single').first();
      }
      this.results_build();
      this.set_tab_index();
      this.set_label_behavior();
      return this.form_field_jq.trigger("chosen:ready", {
        chosen: this
      });
    };

Chosen.prototype.register_observers = function() {
      var _this = this;
      this.container.bind('mousedown.chosen', function(evt) {
        _this.container_mousedown(evt);
      });
      this.container.bind('mouseup.chosen', function(evt) {
        _this.container_mouseup(evt);
      });
      this.container.bind('mouseenter.chosen', function(evt) {
        _this.mouse_enter(evt);
      });
      this.container.bind('mouseleave.chosen', function(evt) {
        _this.mouse_leave(evt);
      });
      this.search_results.bind('mouseup.chosen', function(evt) {
        _this.search_results_mouseup(evt);
      });
      this.search_results.bind('mouseover.chosen', function(evt) {
        _this.search_results_mouseover(evt);
      });
      this.search_results.bind('mouseout.chosen', function(evt) {
        _this.search_results_mouseout(evt);
      });
      this.search_results.bind('mousewheel.chosen DOMMouseScroll.chosen', function(evt) {
        _this.search_results_mousewheel(evt);
      });
      this.search_results.bind('touchstart.chosen', function(evt) {
        _this.search_results_touchstart(evt);
      });
      this.search_results.bind('touchmove.chosen', function(evt) {
        _this.search_results_touchmove(evt);
      });
      this.search_results.bind('touchend.chosen', function(evt) {
        _this.search_results_touchend(evt);
      });
      this.form_field_jq.bind("chosen:updated.chosen", function(evt) {
        _this.results_update_field(evt);
      });
      this.form_field_jq.bind("chosen:activate.chosen", function(evt) {
        _this.activate_field(evt);
      });
      this.form_field_jq.bind("chosen:open.chosen", function(evt) {
        _this.container_mousedown(evt);
      });
      this.form_field_jq.bind("chosen:close.chosen", function(evt) {
        _this.input_blur(evt);
      });
      this.search_field.bind('blur.chosen', function(evt) {
        _this.input_blur(evt);
      });
      this.search_field.bind('keyup.chosen', function(evt) {
        _this.keyup_checker(evt);
      });
      this.search_field.bind('keydown.chosen', function(evt) {
        _this.keydown_checker(evt);
      });
      this.search_field.bind('focus.chosen', function(evt) {
        _this.input_focus(evt);
      });
      this.search_field.bind('cut.chosen', function(evt) {
        _this.clipboard_event_checker(evt);
      });
      this.search_field.bind('paste.chosen', function(evt) {
        _this.clipboard_event_checker(evt);
      });
      if (this.is_multiple) {
        return this.search_choices.bind('click.chosen', function(evt) {
          _this.choices_click(evt);
        });
      } else {
        return this.container.bind('click.chosen', function(evt) {
          evt.preventDefault();
        });
      }
    };

Chosen.prototype.destroy = function() {
      $(this.container[0].ownerDocument).unbind("click.chosen", this.click_test_action);
      if (this.search_field[0].tabIndex) {
        this.form_field_jq[0].tabIndex = this.search_field[0].tabIndex;
      }
      this.container.remove();
      this.form_field_jq.removeData('chosen');
      return this.form_field_jq.show();
    };

Chosen.prototype.search_field_disabled = function() {
      this.is_disabled = this.form_field_jq[0].disabled;
      if (this.is_disabled) {
        this.container.addClass('chosen-disabled');
        this.search_field[0].disabled = true;
        if (!this.is_multiple) {
          this.selected_item.unbind("focus.chosen", this.activate_action);
        }
        return this.close_field();
      } else {
        this.container.removeClass('chosen-disabled');
        this.search_field[0].disabled = false;
        if (!this.is_multiple) {
          return this.selected_item.bind("focus.chosen", this.activate_action);
        }
      }
    };

Chosen.prototype.container_mousedown = function(evt) {
      if (!this.is_disabled) {
        if (evt && evt.type === "mousedown" && !this.results_showing) {
          evt.preventDefault();
        }
        if (!((evt != null) && ($(evt.target)).hasClass("search-choice-close"))) {
          if (!this.active_field) {
            if (this.is_multiple) {
              this.search_field.val("");
            }
            $(this.container[0].ownerDocument).bind('click.chosen', this.click_test_action);
            this.results_show();
          } else if (!this.is_multiple && evt && (($(evt.target)[0] === this.selected_item[0]) || $(evt.target).parents("a.chosen-single").length)) {
            evt.preventDefault();
            this.results_toggle();
          }
          return this.activate_field();
        }
      }
    };

Chosen.prototype.container_mouseup = function(evt) {
      if (evt.target.nodeName === "ABBR" && !this.is_disabled) {
        return this.results_reset(evt);
      }
    };

Chosen.prototype.search_results_mousewheel = function(evt) {
      var delta;
      if (evt.originalEvent) {
        delta = -evt.originalEvent.wheelDelta || evt.originalEvent.detail;
      }
      if (delta != null) {
        evt.preventDefault();
        if (evt.type === 'DOMMouseScroll') {
          delta = delta * 40;
        }
        return this.search_results.scrollTop(delta + this.search_results.scrollTop());
      }
    };

Chosen.prototype.blur_test = function(evt) {
      if (!this.active_field && this.container.hasClass("chosen-container-active")) {
        return this.close_field();
      }
    };

Chosen.prototype.close_field = function() {
      $(this.container[0].ownerDocument).unbind("click.chosen", this.click_test_action);
      this.active_field = false;
      this.results_hide();
      this.container.removeClass("chosen-container-active");
      this.clear_backstroke();
      this.show_search_field_default();
      return this.search_field_scale();
    };

Chosen.prototype.activate_field = function() {
      this.container.addClass("chosen-container-active");
      this.active_field = true;
      this.search_field.val(this.search_field.val());
      return this.search_field.focus();
    };

Chosen.prototype.test_active_click = function(evt) {
      var active_container;
      active_container = $(evt.target).closest('.chosen-container');
      if (active_container.length && this.container[0] === active_container[0]) {
        return this.active_field = true;
      } else {
        return this.close_field();
      }
    };

Chosen.prototype.results_build = function() {
      this.parsing = true;
      this.selected_option_count = null;
      this.results_data = SelectParser.select_to_array(this.form_field);
      if (this.is_multiple) {
        this.search_choices.find("li.search-choice").remove();
      } else if (!this.is_multiple) {
        this.single_set_selected_text();
        if (this.disable_search || this.form_field.options.length <= this.disable_search_threshold) {
          this.search_field[0].readOnly = true;
          this.container.addClass("chosen-container-single-nosearch");
        } else {
          this.search_field[0].readOnly = false;
          this.container.removeClass("chosen-container-single-nosearch");
        }
      }
      this.update_results_content(this.results_option_build({
        first: true
      }));
      this.search_field_disabled();
      this.show_search_field_default();
      this.search_field_scale();
      return this.parsing = false;
    };

Chosen.prototype.result_do_highlight = function(el) {
      var high_bottom, high_top, maxHeight, visible_bottom, visible_top;
      if (el.length) {
        this.result_clear_highlight();
        this.result_highlight = el;
        this.result_highlight.addClass("highlighted");
        maxHeight = parseInt(this.search_results.css("maxHeight"), 10);
        visible_top = this.search_results.scrollTop();
        visible_bottom = maxHeight + visible_top;
        high_top = this.result_highlight.position().top + this.search_results.scrollTop();
        high_bottom = high_top + this.result_highlight.outerHeight();
        if (high_bottom >= visible_bottom) {
          return this.search_results.scrollTop((high_bottom - maxHeight) > 0 ? high_bottom - maxHeight : 0);
        } else if (high_top < visible_top) {
          return this.search_results.scrollTop(high_top);
        }
      }
    };

Chosen.prototype.result_clear_highlight = function() {
      if (this.result_highlight) {
        this.result_highlight.removeClass("highlighted");
      }
      return this.result_highlight = null;
    };

Chosen.prototype.results_show = function() {
      if (this.is_multiple && this.max_selected_options <= this.choices_count()) {
        this.form_field_jq.trigger("chosen:maxselected", {
          chosen: this
        });
        return false;
      }
      this.container.addClass("chosen-with-drop");
      this.results_showing = true;
      this.search_field.focus();
      this.search_field.val(this.search_field.val());
      this.winnow_results();
      return this.form_field_jq.trigger("chosen:showing_dropdown", {
        chosen: this
      });
    };

Chosen.prototype.update_results_content = function(content) {
      return this.search_results.html(content);
    };

Chosen.prototype.results_hide = function() {
      if (this.results_showing) {
        this.result_clear_highlight();
        this.container.removeClass("chosen-with-drop");
        this.form_field_jq.trigger("chosen:hiding_dropdown", {
          chosen: this
        });
      }
      return this.results_showing = false;
    };

Chosen.prototype.set_tab_index = function(el) {
      var ti;
      if (this.form_field.tabIndex) {
        ti = this.form_field.tabIndex;
        this.form_field.tabIndex = -1;
        return this.search_field[0].tabIndex = ti;
      }
    };

Chosen.prototype.set_label_behavior = function() {
      var _this = this;
      this.form_field_label = this.form_field_jq.parents("label");
      if (!this.form_field_label.length && this.form_field.id.length) {
        this.form_field_label = $("label[for='" + this.form_field.id + "']");
      }
      if (this.form_field_label.length > 0) {
        return this.form_field_label.bind('click.chosen', function(evt) {
          if (_this.is_multiple) {
            return _this.container_mousedown(evt);
          } else {
            return _this.activate_field();
          }
        });
      }
    };

Chosen.prototype.show_search_field_default = function() {
      if (this.is_multiple && this.choices_count() < 1 && !this.active_field) {
        this.search_field.val(this.default_text);
        return this.search_field.addClass("default");
      } else {
        this.search_field.val("");
        return this.search_field.removeClass("default");
      }
    };

Chosen.prototype.search_results_mouseup = function(evt) {
      var target;
      target = $(evt.target).hasClass("active-result") ? $(evt.target) : $(evt.target).parents(".active-result").first();
      if (target.length) {
        this.result_highlight = target;
        this.result_select(evt);
        return this.search_field.focus();
      }
    };

Chosen.prototype.search_results_mouseover = function(evt) {
      var target;
      target = $(evt.target).hasClass("active-result") ? $(evt.target) : $(evt.target).parents(".active-result").first();
      if (target) {
        return this.result_do_highlight(target);
      }
    };

Chosen.prototype.search_results_mouseout = function(evt) {
      if ($(evt.target).hasClass("active-result" || $(evt.target).parents('.active-result').first())) {
        return this.result_clear_highlight();
      }
    };

Chosen.prototype.choice_build = function(item) {
      var choice, close_link,
        _this = this;
      choice = $('<li />', {
        "class": "search-choice"
      }).html("<span>" + item.html + "</span>");
      if (item.disabled) {
        choice.addClass('search-choice-disabled');
      } else {
        close_link = $('<a />', {
          "class": 'search-choice-close',
          'data-option-array-index': item.array_index
        });
        close_link.bind('click.chosen', function(evt) {
          return _this.choice_destroy_link_click(evt);
        });
        choice.append(close_link);
      }
      return this.search_container.before(choice);
    };

Chosen.prototype.choice_destroy_link_click = function(evt) {
      evt.preventDefault();
      evt.stopPropagation();
      if (!this.is_disabled) {
        return this.choice_destroy($(evt.target));
      }
    };

Chosen.prototype.choice_destroy = function(link) {
      if (this.result_deselect(link[0].getAttribute("data-option-array-index"))) {
        this.show_search_field_default();
        if (this.is_multiple && this.choices_count() > 0 && this.search_field.val().length < 1) {
          this.results_hide();
        }
        link.parents('li').first().remove();
        return this.search_field_scale();
      }
    };

Chosen.prototype.results_reset = function() {
      this.reset_single_select_options();
      this.form_field.options[0].selected = true;
      this.single_set_selected_text();
      this.show_search_field_default();
      this.results_reset_cleanup();
      this.form_field_jq.trigger("change");
      if (this.active_field) {
        return this.results_hide();
      }
    };

Chosen.prototype.results_reset_cleanup = function() {
      this.current_selectedIndex = this.form_field.selectedIndex;
      return this.selected_item.find("abbr").remove();
    };

Chosen.prototype.result_select = function(evt) {
      var high, item;
      if (this.result_highlight) {
        high = this.result_highlight;
        this.result_clear_highlight();
        if (this.is_multiple && this.max_selected_options <= this.choices_count()) {
          this.form_field_jq.trigger("chosen:maxselected", {
            chosen: this
          });
          return false;
        }
        if (this.is_multiple) {
          high.removeClass("active-result");
        } else {
          this.reset_single_select_options();
        }
        item = this.results_data[high[0].getAttribute("data-option-array-index")];
        item.selected = true;
        this.form_field.options[item.options_index].selected = true;
        this.selected_option_count = null;
        if (this.is_multiple) {
          this.choice_build(item);
        } else {
          this.single_set_selected_text(item.text);
        }
        if (!((evt.metaKey || evt.ctrlKey) && this.is_multiple)) {
          this.results_hide();
        }
        this.search_field.val("");
        if (this.is_multiple || this.form_field.selectedIndex !== this.current_selectedIndex) {
          this.form_field_jq.trigger("change", {
            'selected': this.form_field.options[item.options_index].value
          });
        }
        this.current_selectedIndex = this.form_field.selectedIndex;
        return this.search_field_scale();
      }
    };

Chosen.prototype.single_set_selected_text = function(text) {
      if (text == null) {
        text = this.default_text;
      }
      if (text === this.default_text) {
        this.selected_item.addClass("chosen-default");
      } else {
        this.single_deselect_control_build();
        this.selected_item.removeClass("chosen-default");
      }
      return this.selected_item.find("span").text(text);
    };

Chosen.prototype.result_deselect = function(pos) {
      var result_data;
      result_data = this.results_data[pos];
      if (!this.form_field.options[result_data.options_index].disabled) {
        result_data.selected = false;
        this.form_field.options[result_data.options_index].selected = false;
        this.selected_option_count = null;
        this.result_clear_highlight();
        if (this.results_showing) {
          this.winnow_results();
        }
        this.form_field_jq.trigger("change", {
          deselected: this.form_field.options[result_data.options_index].value
        });
        this.search_field_scale();
        return true;
      } else {
        return false;
      }
    };

Chosen.prototype.single_deselect_control_build = function() {
      if (!this.allow_single_deselect) {
        return;
      }
      if (!this.selected_item.find("abbr").length) {
        this.selected_item.find("span").first().after("<abbr class=\"search-choice-close\"></abbr>");
      }
      return this.selected_item.addClass("chosen-single-with-deselect");
    };

Chosen.prototype.get_search_text = function() {
      if (this.search_field.val() === this.default_text) {
        return "";
      } else {
        return $('<div/>').text($.trim(this.search_field.val())).html();
      }
    };

Chosen.prototype.winnow_results_set_highlight = function() {
      var do_high, selected_results;
      selected_results = !this.is_multiple ? this.search_results.find(".result-selected.active-result") : [];
      do_high = selected_results.length ? selected_results.first() : this.search_results.find(".active-result").first();
      if (do_high != null) {
        return this.result_do_highlight(do_high);
      }
    };

Chosen.prototype.no_results = function(terms) {
      var no_results_html;
      no_results_html = $('<li class="no-results">' + this.results_none_found + ' "<span></span>"</li>');
      no_results_html.find("span").first().html(terms);
      this.search_results.append(no_results_html);
      return this.form_field_jq.trigger("chosen:no_results", {
        chosen: this
      });
    };

Chosen.prototype.no_results_clear = function() {
      return this.search_results.find(".no-results").remove();
    };

Chosen.prototype.keydown_arrow = function() {
      var next_sib;
      if (this.results_showing && this.result_highlight) {
        next_sib = this.result_highlight.nextAll("li.active-result").first();
        if (next_sib) {
          return this.result_do_highlight(next_sib);
        }
      } else {
        return this.results_show();
      }
    };

Chosen.prototype.keyup_arrow = function() {
      var prev_sibs;
      if (!this.results_showing && !this.is_multiple) {
        return this.results_show();
      } else if (this.result_highlight) {
        prev_sibs = this.result_highlight.prevAll("li.active-result");
        if (prev_sibs.length) {
          return this.result_do_highlight(prev_sibs.first());
        } else {
          if (this.choices_count() > 0) {
            this.results_hide();
          }
          return this.result_clear_highlight();
        }
      }
    };

Chosen.prototype.keydown_backstroke = function() {
      var next_available_destroy;
      if (this.pending_backstroke) {
        this.choice_destroy(this.pending_backstroke.find("a").first());
        return this.clear_backstroke();
      } else {
        next_available_destroy = this.search_container.siblings("li.search-choice").last();
        if (next_available_destroy.length && !next_available_destroy.hasClass("search-choice-disabled")) {
          this.pending_backstroke = next_available_destroy;
          if (this.single_backstroke_delete) {
            return this.keydown_backstroke();
          } else {
            return this.pending_backstroke.addClass("search-choice-focus");
          }
        }
      }
    };

Chosen.prototype.clear_backstroke = function() {
      if (this.pending_backstroke) {
        this.pending_backstroke.removeClass("search-choice-focus");
      }
      return this.pending_backstroke = null;
    };

Chosen.prototype.keydown_checker = function(evt) {
      var stroke, _ref1;
      stroke = (_ref1 = evt.which) != null ? _ref1 : evt.keyCode;
      this.search_field_scale();
      if (stroke !== 8 && this.pending_backstroke) {
        this.clear_backstroke();
      }
      switch (stroke) {
        case 8:
          this.backstroke_length = this.search_field.val().length;
          break;
        case 9:
          if (this.results_showing && !this.is_multiple) {
            this.result_select(evt);
          }
          this.mouse_on_container = false;
          break;
        case 13:
          evt.preventDefault();
          break;
        case 38:
          evt.preventDefault();
          this.keyup_arrow();
          break;
        case 40:
          evt.preventDefault();
          this.keydown_arrow();
          break;
      }
    };

Chosen.prototype.search_field_scale = function() {
      var div, f_width, h, style, style_block, styles, w, _i, _len;
      if (this.is_multiple) {
        h = 0;
        w = 0;
        style_block = "position:absolute; left: -1000px; top: -1000px; display:none;";
        styles = ['font-size', 'font-style', 'font-weight', 'font-family', 'line-height', 'text-transform', 'letter-spacing'];
        for (_i = 0, _len = styles.length; _i < _len; _i++) {
          style = styles[_i];
          style_block += style + ":" + this.search_field.css(style) + ";";
        }
        div = $('<div />', {
          'style': style_block
        });
        div.text(this.search_field.val());
        $('body').append(div);
        w = div.width() + 25;
        div.remove();
        f_width = this.container.outerWidth();
        if (w > f_width - 10) {
          w = f_width - 10;
        }
        return this.search_field.css({
          'width': w + 'px'
        });
      }
    };

return Chosen;

})(AbstractChosen);

}).call(this);

${this.title}

Code Editor : achosen.jquery.js