chosen.proto.js

(function() {
  var AbstractChosen, SelectParser,
    bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
    extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
    hasProp = {}.hasOwnProperty;

  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, i, len, option, ref, results1;
      group_position = this.parsed.length;
      this.parsed.push({
        array_index: group_position,
        group: true,
        label: group.label,
        title: group.title ? group.title : void 0,
        children: 0,
        disabled: group.disabled,
        classes: group.className
      });
      ref = group.childNodes;
      results1 = [];
      for (i = 0, len = ref.length; i < len; i++) {
        option = ref[i];
        results1.push(this.add_option(option, group_position, group.disabled));
      }
      return results1;
    };

    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,
            title: option.title ? option.title : void 0,
            selected: option.selected,
            disabled: group_disabled === true ? group_disabled : option.disabled,
            group_array_index: group_position,
            group_label: group_position != null ? this.parsed[group_position].label : null,
            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;
      }
    };

    return SelectParser;

  })();

  SelectParser.select_to_array = function(select) {
    var child, i, len, parser, 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, options1) {
      this.form_field = form_field;
      this.options = options1 != null ? options1 : {};
      this.label_click_handler = bind(this.label_click_handler, this);
      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();
      this.on_ready();
    }

    AbstractChosen.prototype.set_default_values = function() {
      this.click_test_action = (function(_this) {
        return function(evt) {
          return _this.test_active_click(evt);
        };
      })(this);
      this.activate_action = (function(_this) {
        return function(evt) {
          return _this.activate_field(evt);
        };
      })(this);
      this.active_field = false;
      this.mouse_on_container = false;
      this.results_showing = false;
      this.result_highlighted = null;
      this.is_rtl = this.options.rtl || /\bchosen-rtl\b/.test(this.form_field.className);
      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;
      this.display_disabled_options = this.options.display_disabled_options != null ? this.options.display_disabled_options : true;
      this.include_group_label_in_selected = this.options.include_group_label_in_selected || false;
      this.max_shown_results = this.options.max_shown_results || Number.POSITIVE_INFINITY;
      this.case_sensitive_search = this.options.case_sensitive_search || false;
      return this.hide_results_on_select = this.options.hide_results_on_select != null ? this.options.hide_results_on_select : 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;
      }
      this.default_text = this.escape_html(this.default_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.choice_label = function(item) {
      if (this.include_group_label_in_selected && (item.group_label != null)) {
        return "<b class='group-name'>" + item.group_label + "</b>" + item.html;
      } else {
        return item.html;
      }
    };

    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) {
      if (this.is_multiple) {
        if (!this.active_field) {
          return setTimeout(((function(_this) {
            return function() {
              return _this.container_mousedown();
            };
          })(this)), 50);
        }
      } else {
        if (!this.active_field) {
          return this.activate_field();
        }
      }
    };

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

    AbstractChosen.prototype.label_click_handler = function(evt) {
      if (this.is_multiple) {
        return this.container_mousedown(evt);
      } else {
        return this.activate_field();
      }
    };

    AbstractChosen.prototype.results_option_build = function(options) {
      var content, data, data_content, i, len, ref, shown_results;
      content = '';
      shown_results = 0;
      ref = this.results_data;
      for (i = 0, len = ref.length; i < len; i++) {
        data = ref[i];
        data_content = '';
        if (data.group) {
          data_content = this.result_add_group(data);
        } else {
          data_content = this.result_add_option(data);
        }
        if (data_content !== '') {
          shown_results++;
          content += data_content;
        }
        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(this.choice_label(data));
          }
        }
        if (shown_results >= this.max_shown_results) {
          break;
        }
      }
      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.highlighted_html || option.html;
      if (option.title) {
        option_el.title = option.title;
      }
      return this.outerHTML(option_el);
    };

    AbstractChosen.prototype.result_add_group = function(group) {
      var classes, group_el;
      if (!(group.search_match || group.group_match)) {
        return '';
      }
      if (!(group.active_options > 0)) {
        return '';
      }
      classes = [];
      classes.push("group-result");
      if (group.classes) {
        classes.push(group.classes);
      }
      group_el = document.createElement("li");
      group_el.className = classes.join(" ");
      group_el.innerHTML = group.highlighted_html || this.escape_html(group.label);
      if (group.title) {
        group_el.title = group.title;
      }
      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 i, len, ref, result, results1;
      ref = this.results_data;
      results1 = [];
      for (i = 0, len = ref.length; i < len; i++) {
        result = ref[i];
        if (result.selected) {
          results1.push(result.selected = false);
        } else {
          results1.push(void 0);
        }
      }
      return results1;
    };

    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 escapedQuery, fix, i, len, option, prefix, query, ref, regex, results, results_group, search_match, startpos, suffix, text;
      this.no_results_clear();
      results = 0;
      query = this.get_search_text();
      escapedQuery = query.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
      regex = this.get_search_regex(escapedQuery);
      ref = this.results_data;
      for (i = 0, len = ref.length; i < len; i++) {
        option = ref[i];
        option.search_match = false;
        results_group = null;
        search_match = null;
        option.highlighted_html = '';
        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;
          }
          text = option.group ? option.label : option.text;
          if (!(option.group && !this.group_search)) {
            search_match = this.search_string_match(text, regex);
            option.search_match = search_match != null;
            if (option.search_match && !option.group) {
              results += 1;
            }
            if (option.search_match) {
              if (query.length) {
                startpos = search_match.index;
                prefix = text.slice(0, startpos);
                fix = text.slice(startpos, startpos + query.length);
                suffix = text.slice(startpos + query.length);
                option.highlighted_html = (this.escape_html(prefix)) + "<em>" + (this.escape_html(fix)) + "</em>" + (this.escape_html(suffix));
              }
              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 && query.length) {
        this.update_results_content("");
        return this.no_results(query);
      } else {
        this.update_results_content(this.results_option_build());
        return this.winnow_results_set_highlight();
      }
    };

    AbstractChosen.prototype.get_search_regex = function(escaped_search_string) {
      var regex_flag, regex_string;
      regex_string = this.search_contains ? escaped_search_string : "(^|\\s|\\b)" + escaped_search_string + "[^\\s]*";
      if (!(this.enable_split_word_search || this.search_contains)) {
        regex_string = "^" + regex_string;
      }
      regex_flag = this.case_sensitive_search ? "" : "i";
      return new RegExp(regex_string, regex_flag);
    };

    AbstractChosen.prototype.search_string_match = function(search_string, regex) {
      var match;
      match = regex.exec(search_string);
      if (!this.search_contains && (match != null ? match[1] : void 0)) {
        match.index += 1;
      }
      return match;
    };

    AbstractChosen.prototype.choices_count = function() {
      var i, len, option, 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();
      this.activate_field();
      if (!(this.results_showing || this.is_disabled)) {
        return this.results_show();
      }
    };

    AbstractChosen.prototype.keydown_checker = function(evt) {
      var ref, stroke;
      stroke = (ref = evt.which) != null ? ref : evt.keyCode;
      this.search_field_scale();
      if (stroke !== 8 && this.pending_backstroke) {
        this.clear_backstroke();
      }
      switch (stroke) {
        case 8:
          this.backstroke_length = this.get_search_field_value().length;
          break;
        case 9:
          if (this.results_showing && !this.is_multiple) {
            this.result_select(evt);
          }
          this.mouse_on_container = false;
          break;
        case 13:
          if (this.results_showing) {
            evt.preventDefault();
          }
          break;
        case 27:
          if (this.results_showing) {
            evt.preventDefault();
          }
          break;
        case 32:
          if (this.disable_search) {
            evt.preventDefault();
          }
          break;
        case 38:
          evt.preventDefault();
          this.keyup_arrow();
          break;
        case 40:
          evt.preventDefault();
          this.keydown_arrow();
          break;
      }
    };

    AbstractChosen.prototype.keyup_checker = function(evt) {
      var ref, stroke;
      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) {
            this.keydown_backstroke();
          } else if (!this.pending_backstroke) {
            this.result_clear_highlight();
            this.results_search();
          }
          break;
        case 13:
          evt.preventDefault();
          if (this.results_showing) {
            this.result_select(evt);
          }
          break;
        case 27:
          if (this.results_showing) {
            this.results_hide();
          }
          break;
        case 9:
        case 16:
        case 17:
        case 18:
        case 38:
        case 40:
        case 91:
          break;
        default:
          this.results_search();
          break;
      }
    };

    AbstractChosen.prototype.clipboard_event_checker = function(evt) {
      if (this.is_disabled) {
        return;
      }
      return setTimeout(((function(_this) {
        return function() {
          return _this.results_search();
        };
      })(this)), 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.prototype.get_single_html = function() {
      return "<a class=\"chosen-single chosen-default\">\n  <span>" + this.default_text + "</span>\n  <div><b></b></div>\n</a>\n<div class=\"chosen-drop\">\n  <div class=\"chosen-search\">\n    <input class=\"chosen-search-input\" type=\"text\" autocomplete=\"off\" />\n  </div>\n  <ul class=\"chosen-results\"></ul>\n</div>";
    };

    AbstractChosen.prototype.get_multi_html = function() {
      return "<ul class=\"chosen-choices\">\n  <li class=\"search-field\">\n    <input class=\"chosen-search-input\" type=\"text\" autocomplete=\"off\" value=\"" + this.default_text + "\" />\n  </li>\n</ul>\n<div class=\"chosen-drop\">\n  <ul class=\"chosen-results\"></ul>\n</div>";
    };

    AbstractChosen.prototype.get_no_results_html = function(terms) {
      return "<li class=\"no-results\">\n  " + this.results_none_found + " <span>" + (this.escape_html(terms)) + "</span>\n</li>";
    };

    AbstractChosen.browser_is_supported = function() {
      if ("Microsoft Internet Explorer" === window.navigator.appName) {
        return document.documentMode >= 8;
      }
      if (/iP(od|hone)/i.test(window.navigator.userAgent) || /IEMobile/i.test(window.navigator.userAgent) || /Windows Phone/i.test(window.navigator.userAgent) || /BlackBerry/i.test(window.navigator.userAgent) || /BB10/i.test(window.navigator.userAgent) || /Android.*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;

  })();

  this.Chosen = (function(superClass) {
    var triggerHtmlEvent;

    extend(Chosen, superClass);

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

    Chosen.prototype.setup = function() {
      return this.current_selectedIndex = this.form_field.selectedIndex;
    };

    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(' '),
        'title': this.form_field.title
      };
      if (this.form_field.id.length) {
        container_props.id = this.form_field.id.replace(/[^\w]/g, '_') + "_chosen";
      }
      this.container = new Element('div', container_props);
      this.container.setStyle({
        width: this.container_width()
      });
      if (this.is_multiple) {
        this.container.update(this.get_multi_html());
      } else {
        this.container.update(this.get_single_html());
      }
      this.form_field.hide().insert({
        after: this.container
      });
      this.dropdown = this.container.down('div.chosen-drop');
      this.search_field = this.container.down('input');
      this.search_results = this.container.down('ul.chosen-results');
      this.search_field_scale();
      this.search_no_results = this.container.down('li.no-results');
      if (this.is_multiple) {
        this.search_choices = this.container.down('ul.chosen-choices');
        this.search_container = this.container.down('li.search-field');
      } else {
        this.search_container = this.container.down('div.chosen-search');
        this.selected_item = this.container.down('.chosen-single');
      }
      this.results_build();
      this.set_tab_index();
      return this.set_label_behavior();
    };

    Chosen.prototype.on_ready = function() {
      return this.form_field.fire("chosen:ready", {
        chosen: this
      });
    };

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

    Chosen.prototype.destroy = function() {
      var event, i, len, ref;
      this.container.ownerDocument.stopObserving("click", this.click_test_action);
      ref = ['chosen:updated', 'chosen:activate', 'chosen:open', 'chosen:close'];
      for (i = 0, len = ref.length; i < len; i++) {
        event = ref[i];
        this.form_field.stopObserving(event);
      }
      this.container.stopObserving();
      this.search_results.stopObserving();
      this.search_field.stopObserving();
      if (this.form_field_label != null) {
        this.form_field_label.stopObserving();
      }
      if (this.is_multiple) {
        this.search_choices.stopObserving();
        this.container.select(".search-choice-close").each(function(choice) {
          return choice.stopObserving();
        });
      } else {
        this.selected_item.stopObserving();
      }
      if (this.search_field.tabIndex) {
        this.form_field.tabIndex = this.search_field.tabIndex;
      }
      this.container.remove();
      return this.form_field.show();
    };

    Chosen.prototype.search_field_disabled = function() {
      var ref;
      this.is_disabled = this.form_field.disabled || ((ref = this.form_field.up('fieldset')) != null ? ref.disabled : void 0) || false;
      if (this.is_disabled) {
        this.container.addClassName('chosen-disabled');
      } else {
        this.container.removeClassName('chosen-disabled');
      }
      this.search_field.disabled = this.is_disabled;
      if (!this.is_multiple) {
        this.selected_item.stopObserving('focus', this.activate_field);
      }
      if (this.is_disabled) {
        return this.close_field();
      } else if (!this.is_multiple) {
        return this.selected_item.observe('focus', this.activate_field);
      }
    };

    Chosen.prototype.container_mousedown = function(evt) {
      var ref;
      if (this.is_disabled) {
        return;
      }
      if (evt && ((ref = evt.type) === 'mousedown' || ref === 'touchstart') && !this.results_showing) {
        evt.preventDefault();
      }
      if (!((evt != null) && evt.target.hasClassName("search-choice-close"))) {
        if (!this.active_field) {
          if (this.is_multiple) {
            this.search_field.clear();
          }
          this.container.ownerDocument.observe("click", this.click_test_action);
          this.results_show();
        } else if (!this.is_multiple && evt && (evt.target === this.selected_item || evt.target.up("a.chosen-single"))) {
          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;
      delta = evt.deltaY || -evt.wheelDelta || evt.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.hasClassName("chosen-container-active")) {
        return this.close_field();
      }
    };

    Chosen.prototype.close_field = function() {
      this.container.ownerDocument.stopObserving("click", this.click_test_action);
      this.active_field = false;
      this.results_hide();
      this.container.removeClassName("chosen-container-active");
      this.clear_backstroke();
      this.show_search_field_default();
      this.search_field_scale();
      return this.search_field.blur();
    };

    Chosen.prototype.activate_field = function() {
      if (this.is_disabled) {
        return;
      }
      this.container.addClassName("chosen-container-active");
      this.active_field = true;
      this.search_field.value = this.get_search_field_value();
      return this.search_field.focus();
    };

    Chosen.prototype.test_active_click = function(evt) {
      if (evt.target.up('.chosen-container') === this.container) {
        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.select("li.search-choice").invoke("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.readOnly = true;
          this.container.addClassName("chosen-container-single-nosearch");
        } else {
          this.search_field.readOnly = false;
          this.container.removeClassName("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;
      this.result_clear_highlight();
      this.result_highlight = el;
      this.result_highlight.addClassName("highlighted");
      maxHeight = parseInt(this.search_results.getStyle('maxHeight'), 10);
      visible_top = this.search_results.scrollTop;
      visible_bottom = maxHeight + visible_top;
      high_top = this.result_highlight.positionedOffset().top;
      high_bottom = high_top + this.result_highlight.getHeight();
      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.removeClassName('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.fire("chosen:maxselected", {
          chosen: this
        });
        return false;
      }
      this.container.addClassName("chosen-with-drop");
      this.results_showing = true;
      this.search_field.focus();
      this.search_field.value = this.get_search_field_value();
      this.winnow_results();
      return this.form_field.fire("chosen:showing_dropdown", {
        chosen: this
      });
    };

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

    Chosen.prototype.results_hide = function() {
      if (this.results_showing) {
        this.result_clear_highlight();
        this.container.removeClassName("chosen-with-drop");
        this.form_field.fire("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.tabIndex = ti;
      }
    };

    Chosen.prototype.set_label_behavior = function() {
      this.form_field_label = this.form_field.up("label");
      if (this.form_field_label == null) {
        this.form_field_label = $$("label[for='" + this.form_field.id + "']").first();
      }
      if (this.form_field_label != null) {
        return this.form_field_label.observe("click", this.label_click_handler);
      }
    };

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

    Chosen.prototype.search_results_mouseup = function(evt) {
      var target;
      target = evt.target.hasClassName("active-result") ? evt.target : evt.target.up(".active-result");
      if (target) {
        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.hasClassName("active-result") ? evt.target : evt.target.up(".active-result");
      if (target) {
        return this.result_do_highlight(target);
      }
    };

    Chosen.prototype.search_results_mouseout = function(evt) {
      if (evt.target.hasClassName('active-result') || evt.target.up('.active-result')) {
        return this.result_clear_highlight();
      }
    };

    Chosen.prototype.choice_build = function(item) {
      var choice, close_link;
      choice = new Element('li', {
        "class": "search-choice"
      }).update("<span>" + (this.choice_label(item)) + "</span>");
      if (item.disabled) {
        choice.addClassName('search-choice-disabled');
      } else {
        close_link = new Element('a', {
          href: '#',
          "class": 'search-choice-close',
          rel: item.array_index
        });
        close_link.observe("click", (function(_this) {
          return function(evt) {
            return _this.choice_destroy_link_click(evt);
          };
        })(this));
        choice.insert(close_link);
      }
      return this.search_container.insert({
        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.readAttribute("rel"))) {
        if (this.active_field) {
          this.search_field.focus();
        } else {
          this.show_search_field_default();
        }
        if (this.is_multiple && this.choices_count() > 0 && this.get_search_field_value().length < 1) {
          this.results_hide();
        }
        link.up('li').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.trigger_form_field_change();
      if (this.active_field) {
        return this.results_hide();
      }
    };

    Chosen.prototype.results_reset_cleanup = function() {
      var deselect_trigger;
      this.current_selectedIndex = this.form_field.selectedIndex;
      deselect_trigger = this.selected_item.down("abbr");
      if (deselect_trigger) {
        return deselect_trigger.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.fire("chosen:maxselected", {
            chosen: this
          });
          return false;
        }
        if (this.is_multiple) {
          high.removeClassName("active-result");
        } else {
          this.reset_single_select_options();
        }
        high.addClassName("result-selected");
        item = this.results_data[high.getAttribute("data-option-array-index")];
        item.selected = true;
        this.form_field.options[item.options_index].selected = true;
        this.selected_option_count = null;
        this.search_field.value = "";
        if (this.is_multiple) {
          this.choice_build(item);
        } else {
          this.single_set_selected_text(this.choice_label(item));
        }
        if (this.is_multiple && (!this.hide_results_on_select || (evt.metaKey || evt.ctrlKey))) {
          this.winnow_results();
        } else {
          this.results_hide();
          this.show_search_field_default();
        }
        if (this.is_multiple || this.form_field.selectedIndex !== this.current_selectedIndex) {
          this.trigger_form_field_change();
        }
        this.current_selectedIndex = this.form_field.selectedIndex;
        evt.preventDefault();
        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.addClassName("chosen-default");
      } else {
        this.single_deselect_control_build();
        this.selected_item.removeClassName("chosen-default");
      }
      return this.selected_item.down("span").update(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.trigger_form_field_change();
        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.down("abbr")) {
        this.selected_item.down("span").insert({
          after: "<abbr class=\"search-choice-close\"></abbr>"
        });
      }
      return this.selected_item.addClassName("chosen-single-with-deselect");
    };

    Chosen.prototype.get_search_field_value = function() {
      return this.search_field.value;
    };

    Chosen.prototype.get_search_text = function() {
      return this.get_search_field_value().strip();
    };

    Chosen.prototype.escape_html = function(text) {
      return text.escapeHTML();
    };

    Chosen.prototype.winnow_results_set_highlight = function() {
      var do_high;
      if (!this.is_multiple) {
        do_high = this.search_results.down(".result-selected.active-result");
      }
      if (do_high == null) {
        do_high = this.search_results.down(".active-result");
      }
      if (do_high != null) {
        return this.result_do_highlight(do_high);
      }
    };

    Chosen.prototype.no_results = function(terms) {
      this.search_results.insert(this.get_no_results_html(terms));
      return this.form_field.fire("chosen:no_results", {
        chosen: this
      });
    };

    Chosen.prototype.no_results_clear = function() {
      var nr, results1;
      nr = null;
      results1 = [];
      while (nr = this.search_results.down(".no-results")) {
        results1.push(nr.remove());
      }
      return results1;
    };

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

    Chosen.prototype.keyup_arrow = function() {
      var actives, prevs, sibs;
      if (!this.results_showing && !this.is_multiple) {
        return this.results_show();
      } else if (this.result_highlight) {
        sibs = this.result_highlight.previousSiblings();
        actives = this.search_results.select("li.active-result");
        prevs = sibs.intersect(actives);
        if (prevs.length) {
          return this.result_do_highlight(prevs.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.down("a"));
        return this.clear_backstroke();
      } else {
        next_available_destroy = this.search_container.siblings().last();
        if (next_available_destroy && next_available_destroy.hasClassName("search-choice") && !next_available_destroy.hasClassName("search-choice-disabled")) {
          this.pending_backstroke = next_available_destroy;
          if (this.pending_backstroke) {
            this.pending_backstroke.addClassName("search-choice-focus");
          }
          if (this.single_backstroke_delete) {
            return this.keydown_backstroke();
          } else {
            return this.pending_backstroke.addClassName("search-choice-focus");
          }
        }
      }
    };

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

    Chosen.prototype.search_field_scale = function() {
      var container_width, div, i, len, style, style_block, styles, width;
      if (!this.is_multiple) {
        return;
      }
      style_block = {
        position: 'absolute',
        left: '-1000px',
        top: '-1000px',
        display: 'none',
        whiteSpace: 'pre'
      };
      styles = ['fontSize', 'fontStyle', 'fontWeight', 'fontFamily', 'lineHeight', 'textTransform', 'letterSpacing'];
      for (i = 0, len = styles.length; i < len; i++) {
        style = styles[i];
        style_block[style] = this.search_field.getStyle(style);
      }
      div = new Element('div').update(this.escape_html(this.get_search_field_value()));
      div.setStyle(style_block);
      document.body.appendChild(div);
      width = div.measure('width') + 25;
      div.remove();
      if (container_width = this.container.getWidth()) {
        width = Math.min(container_width - 10, width);
      }
      return this.search_field.setStyle({
        width: width + 'px'
      });
    };

    Chosen.prototype.trigger_form_field_change = function() {
      triggerHtmlEvent(this.form_field, 'input');
      return triggerHtmlEvent(this.form_field, 'change');
    };

    triggerHtmlEvent = function(element, eventType) {
      var error, evt;
      if (element.dispatchEvent) {
        try {
          evt = new Event(eventType, {
            bubbles: true,
            cancelable: true
          });
        } catch (error) {
          evt = document.createEvent('HTMLEvents');
          evt.initEvent(eventType, true, true);
        }
        return element.dispatchEvent(evt);
      } else {
        return element.fireEvent("on" + eventType, document.createEventObject());
      }
    };

    return Chosen;

  })(AbstractChosen);

}).call(this);