function secshow() {
    var windowheight = $(window).height();
    $('.showani').each(function() {
        var thisheight = $(this).height();
        if (window.innerWidth > 1024) {
            if ($(window).scrollTop() + windowheight> $(this).offset().top) {
                $(this).addClass('actived');
            }
        }
        else{
            if ($(window).scrollTop() + windowheight * 0.85> $(this).offset().top) {
                $(this).addClass('actived');
            }
        }
    });
};

function fontsize() {
    var windowwidth = window.innerWidth;
    if (windowwidth <= 1024) {
        var size = windowwidth * 16 / 375;
        $('html').css('font-size', size + 'px');
    } else {
        var size = windowwidth * 16 / 1920;
        $('html').css('font-size', size + 'px');
    }
};

function DevicePixelRatio() {
    function constructor() {
        //this.flag = false;
    }
    //获取系统类型
   function  getSystem() {
        let flag = false;
        var agent = navigator.userAgent.toLowerCase();
        //    var isMac = /macintosh|mac os x/i.test(navigator.userAgent);
        //    if(isMac) {
        //      return false;
        //    }
        //现只针对windows处理，其它系统暂无该情况，如有，继续在此添加
        if (agent.indexOf("windows") >= 0) {
            return true;
        }
    }
    //获取页面缩放比例
    //  _getDevicePixelRatio() {
    //    let t = this;
    //  }
    //监听方法兼容写法
    function addHandler(element, type, handler) {
        if (element.addEventListener) {
            element.addEventListener(type, handler, false);
        } else if (element.attachEvent) {
            element.attachEvent("on" + type, handler);
        } else {
            element["on" + type] = handler;
        }
    }
    //校正浏览器缩放比例
    function correct() {
        let t = this;
        //页面devicePixelRatio（设备像素比例）变化后，计算页面body标签zoom修改其大小，来抵消devicePixelRatio带来的变化。
        document.getElementsByTagName('body')[0].style.zoom = 1 / window.devicePixelRatio;
    }
    //监听页面缩放
    function watch() {
        let t = this;
        addHandler(window, 'resize', function() { //注意这个方法是解决全局有两个window.resize
            //重新校正
            correct(t)
        })
    }
    //初始化页面比例
    function init() {
        let t = this;
        if (getSystem(t)) { //判断设备，目前只在windows系统下校正浏览器缩放比例
            //初始化页面校正浏览器缩放比例
            correct(t);
            //开启监听页面缩放
            watch(t);
        }
    }
    init();
};

// 禁止通过 ctrl + +/- 和    ctrl + 滚轮 对页面进行缩放
  document.addEventListener('keydown', function (event) {
    if ((event.ctrlKey === true || event.metaKey === true) &&
      (event.which === 61 || event.which === 107 ||
        event.which === 173 || event.which === 109 ||
        event.which === 187 || event.which === 189)) {
      event.preventDefault()
    }
  }, false)
  // Chrome IE 360
  window.addEventListener('mousewheel', function (event) {
    if (event.ctrlKey === true || event.metaKey) {
      event.preventDefault()
    }
  }, {
    passive: false
  })

  // firefox
  window.addEventListener('DOMMouseScroll', function (event) {
    if (event.ctrlKey === true || event.metaKey) {
      event.preventDefault()
    }
  }, {
    passive: false
  })

function isIE() 
{  
    if(!!window.ActiveXObject || "ActiveXObject" in window) {
        $('html').addClass('ie');
    }
} 
$(function() {
    $('a[linkto]').click(function(){
        var link = $(this).attr('linkto');
        var targetblank = $(this).attr('targetblank');
        var windowwidth = window.innerWidth;
        if (windowwidth > 1024 && targetblank =="") {
            window.open(link,"_blank");
        }
        else{
            location.replace(link);
        }
    });
    isIE();
    fontsize();
    $(window).load(function() {
        secshow();
        if ($('body').hasClass('nosmooth')) {

        }
        else{
            gsap.registerPlugin(ScrollTrigger,ScrollSmoother);
            gsap.config({trialWarn: false});
            if (window.innerWidth > 1024) {
                ScrollTrigger.normalizeScroll(true);
            }
            let smoother = ScrollSmoother.create({
              smooth: 0.75,   // seconds it takes to "catch up" to native scroll position
            });
        }
    });
    $(window).scroll(function() {
        secshow();
    });
    $(window).resize(function() {
        secshow();
        fontsize();
    });
    
    // sidenav 打开
    $('#header .menu').click(function() {
        $('#sidenav').addClass('active');
        $('body').addClass('noscroll');
    });
    $('#sidenav .close').click(function() {
        $('#sidenav').removeClass('active');
        $('body').removeClass('noscroll');
    });
    // sidenav 副导航
    $('#sidenav .middle-part .level1').click(function() {
        if ($(this).parents('.box').hasClass('active')) {
            $('#sidenav .middle-part .box').removeClass('active');
        }
        else{
            $('#sidenav .middle-part .box').removeClass('active');
            $(this).parents('.box').addClass('active');
        }
    });
});
/**
 * @desc 用于微信内调整字体大小的控制方法，
将字体设为默认并重写事件
 * @author jealyn
 * @date 2021-02-18 15:29:54
 * @version V1.0.0
 */
(function() {
    if (typeof WeixinJSBridge == 'object' && typeof WeixinJSBridge.invoke == 'function') {
        handleFontSize();
    } else {
        document.addEventListener('WeixinJSBridgeReady', handleFontSize, false);
    }

    function handleFontSize() {
        // 设置网页字体为默认大小
        WeixinJSBridge.invoke('setFontSizeCallback', {
            fontSize: 0
        });
        // 重写设置网页字体大小的事件，
        // 将字体大小设为默认
        WeixinJSBridge.on('menu:setfont', function() {
            WeixinJSBridge.invoke('setFontSizeCallback', {
                fontSize: 0
            });
        });
    }
})();