(function ($) {

  $.extend(true, $.fn.combobox.defaults, {
    editable: true,
    filter: function (input, row) {
      // 清空内容, 则不过滤
      if (!$.trim(input)) return true;
      input = input.toUpperCase();

      // 先判断显示值
      var opts = $(this).combobox('options');
      var text = row[opts.textField].toUpperCase();
      if (text.indexOf(input) >= 0) {
        return true;
      }

      var letter = pinyin ? pinyin.getCamelChars(text) : text;
      return (letter.indexOf(input) >= 0);
    },
    onHidePanel: function () {
      var el = $(this);
      el.combobox('textbox').focus();

      // 检查录入内容是否在数据里
      var opts = el.combobox("options");
      var data = el.combobox("getData");
      var value = el.combobox("getValue");

      // 有高亮选中的项目, 则不进一步处理
      var panel = el.combobox("panel");
      var items = panel.find(".combobox-item-selected");
      if (items.length > 0) {
        var values = el.combobox("getValues");
        el.combobox("setValues", values);
        return;
      }

      var allowInput = opts.allowInput;
      if (allowInput) {
        // 允许录入, 并且当前下拉没内容(过滤掉了), 则加入下拉列表里
        var idx = data.length;

        data[idx] = [];
        data[idx][opts.textField] = value;
        data[idx][opts.valueField] = value;

        el.combobox("loadData", data);
      } else {
        // 不允许录入任意项, 则清空
        el.combobox("clear");
        if (el.combo("options").onSelect) {
          el.combo("options").onSelect.call(el, null);
        }
      }
    },
    keyHandler: {
      query: function (q, evt) {
        var target = this;
        var el = $(this);

        var state = $.data(target, 'combobox');
        var opts = state.options;

        if (opts.multiple && !q) {
          el.combobox("setValues", [], true);
        } else {
          el.combobox("setValues", [q], true);
        }

        var panel = el.combo('panel');
        panel.find('div.combobox-item-selected,div.combobox-item-hover').removeClass('combobox-item-selected combobox-item-hover');
        panel.find('div.combobox-item,div.combobox-group').hide();
        var data = el.combobox('getData');
        var vv = [];
        var qq = opts.multiple ? q.split(opts.separator) : [q];
        $.map(qq, function (q) {
          q = $.trim(q);
          for (var i = 0; i < data.length; i++) {
            var row = data[i];
            if (opts.filter.call(el, q, row)) {
              var v = row[opts.valueField];
              var s = row[opts.textField];
              var g = row[opts.groupField];
              var item = opts.finder.getEl(target, v).show();
              vv.push(row);
            }
          }
        });

        // 默认高亮第一项
        if (vv.length > 0 && q) {
          var v = vv[0][opts.valueField];
          var item = opts.finder.getEl(target, v);
          item.addClass('combobox-item-selected');

          // 只改value, 不改text
          el.combo("setValues", [v], true);
          if (el.combo("options").onSelect) {
            el.combo("options").onSelect.call(el, vv[0]);
          }
        }
      }
    }
  });

})(jQuery);