/*
 * 基于JQuery开发的网站功能脚本，适用于Finch UI框架开发的主题或插件
 * 作者：星岚工作室（QQ：914466480）
 * 网站：https://www.finchui.com/
*/
// Sunday, October 15, 2023 @ 05:35:24 PM
// 修复右侧栏固定底部不能与左边主要模块底部对齐的问题
// 增加判断.scrollBox类名是否在网页中存在
(function () {
    class ScrollBoxClass {
      constructor(a) {
        this.box = a.box || ".scrollBox";
        this.top = a.top || "0px";
        this.minWidth = a.minWidth || 0;
        this.bottom = a.bottom || 0;
        this.space = a.space || 20;
        this.transition = a.transition == false ? false : true;
        if (a.maxHeightBox) {
          this.maxHeight = $(a.maxHeightBox).offset().top + $(a.maxHeightBox).height();
        }
        this.init();
      }
  
      init() {
        this.G = window.innerWidth;
        this.A = window.innerHeight;
        this.boxT = $(this.box).offset().top;
        this.boxH = $(this.box).height();
        this.boxMT = 0;
  
        $(window).resize(() => {
          this.throttle(this.c.bind(this), 200, 3000)();
        });
        
        if (this.G >= this.minWidth) {
          if (this.transition) {
            $(this.box).css("transition", "margin 0.1s ease-out");
            $(window).scroll(() => {
              this.throttle(this.a.bind(this), 200, 3000)();
            });
          } else {
            $(window).scroll(this.a.bind(this));
          }
          this.a();
        }
      }
  
      c() {
        this.G = window.innerWidth;
        this.A = window.innerHeight;
        this.boxT = $(this.box).offset().top - parseFloat($(this.box).css("margin-top"));
        this.boxH = $(this.box).height();
      }
  
      a() {
        if (this.G >= this.minWidth) {
          if (this.maxHeight < this.boxT + this.boxH + this.space) {
            return false;
          }
          var C = $(window).scrollTop();
          if (this.boxH > this.A - this.top - this.space * 2) {
            if (C <= this.boxT - this.top - this.space) {
              $(this.box).css({ "margin-top": "0" });
            } else {
              if (this.maxHeight) {
                if (C > this.maxHeight + this.space - this.A) {
                  $(this.box).css({
                    "margin-top": this.maxHeight - this.boxT - this.boxH + "px"
                  });
                  return false;
                }
              }
              var D = C - this.boxT - (this.boxH + this.bottom + this.space - this.A);
              if (D < this.boxMT) {
                if (C < $(this.box).offset().top - this.top - this.space) {
                  this.boxMT = C - this.boxT + this.top + this.space;
                }
              } else {
                this.boxMT = D;
              }
              $(this.box).css({ "margin-top": this.boxMT + "px" });
            }
          } else {
            if (C <= this.boxT - this.top - this.space) {
              $(this.box).css({ "margin-top": "0" });
            } else {
              if (this.maxHeight) {
                if (C > this.maxHeight - this.boxH - this.top - this.space) {
                  return false;
                }
              }
              var D = C - this.boxT + this.top + this.space;
              $(this.box).css({ "margin-top": D + "px" });
            }
          }
        }
      }
      
      throttle(c, A, a) {
        var B = null;
        var G = null;
        return function () {
          var D = +new Date();
          !G && (G = D);
          if (a && D - G > a) {
            c();
            G = D;
          } else {
            clearTimeout(B);
            B = setTimeout(function () {
              c();
              G = null;
            }, A);
          }
        };
      }
    }
// 自定义配置
    $(window).on('load', function() {
      if ($(".scrollBox").length > 0){
      new ScrollBoxClass({
        box: '.scrollBox', 
        top: 1, 
        bottom: 0, 
        space: 60, 
        maxHeightBox: '.main-left', 
        minWidth: 820, 
        transition: true
      });
    }
    });
  })();