Calendar永远只会往下弹出，弹到页面外面去了

[Diluka]

临时修复方案，仅针对DatePicker，没有处理DatetimePicker

CSS：

.bui-calendar2:before {
    content: '';
    display: inline-block;
    border-top: 7px solid rgba(0, 0, 0, 0.2);
    border-right: 7px solid transparent;
    border-bottom-width: 0;
    border-left: 7px solid transparent;
    position: absolute;
    left: 5px;
    bottom: -7px !important;
    top: auto !important;
}

.bui-calendar2:after {
    content: '';
    display: inline-block;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 0;
    border-top: 6px solid #fff;
    position: absolute;
    left: 6px;
    bottom: -6px;
    top: auto;
}

JS：

/**
 * 修复dp永远往下弹出的bug
 * @param $ jQuery
 * @param Calendar BUI.Calendar
 */
function datepickerFix($, Calendar) {

    //删除已经生成的dp
    $(".bui-datepicker").remove();

    //重新创建dp
    var datepicker = new Calendar.DatePicker({
        trigger: '.calendar',
        delegateTrigger: true,
        autoRender: true
    });

    //添加show事件响应
    datepicker.on("show", function (e) {

        var $dp = $(e.target.get("el"));

        if ($(window).height() < $dp.offset().top + $dp.height()) {
            $dp.offset({top: $dp.offset().top - $dp.height() - 32});
            $dp.find(".bui-calendar").addClass("bui-calendar2");
        } else {
            $dp.find(".bui-calendar").removeClass("bui-calendar2");
        }
    });

}