;(function(win, lib){
var doc = win.document;
var docEl = doc.documentElement;
var metaEl = doc.querySelector('meta[name="viewport"]');
var firstHeadEl = doc.getElementsByTagName('head')[0];
var initDpr = 0;
var dpr = 0;
var scale = 0;
var tid;
// 重置默认样式
var cssText = '@charset "utf-8";html{color:#000;background-color:#fff;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}html *{outline:0;-webkit-text-size-adjust:none;-webkit-tap-highlight-color:rgba(0,0,0,0)}html,body{font-family:sans-serif}body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,th,td,hr,button,article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{margin:0;padding:0}table{border-collapse:collapse;border-spacing:0}fieldset,img{border:0}del{text-decoration:line-through}address,caption,cite,code,dfn,em,th,var{font-style:normal;font-weight:500}ol,ul{list-style:none}caption,th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:500}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.25em}a:hover{text-decoration:underline}ins,a{text-decoration:none}canvas,img{vertical-align:top}';
var styleEl = doc.createElement('style');
firstHeadEl.appendChild(styleEl);
try{
styleEl.innerHTML = cssText;
}catch(e){
styleEl.innerText = cssText;
}
// 移动端判断
function isMobile(){
return /(iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Windows Phone)/i.test(win.navigator.userAgent);
}
function refreshRem(){
var devicePixelRatio = win.devicePixelRatio;
if(devicePixelRatio >= 1){
dpr = devicePixelRatio;
}else{
dpr = 1;
}
if(initDpr !== dpr){
docEl.setAttribute('data-dpr', dpr);
initDpr = dpr;
lib.dpr = dpr;
scale = 1 / dpr;
if(!metaEl){
metaEl = doc.createElement('meta');
firstHeadEl.appendChild(metaEl);
metaEl.setAttribute('name', 'viewport');
metaEl.setAttribute('content', 'width=device-width, initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
}else{
metaEl.setAttribute('content', 'width=device-width, initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
}
}
var wid = docEl.getBoundingClientRect().width; // 默认为竖屏
// 移动端长屏处理(例如，18:9等)
if(window.innerWidth / window.innerHeight > 16 / 9){
wid = Math.floor(window.innerHeight * 16 / 9);
}
// 适配平板中的宽屏(4 * 3), 实际要减去状态栏的高度。
if(window.innerHeight < window.innerWidth && window.innerHeight / window.innerWidth >= 0.72){
docEl.setAttribute('data-adapter', 'ipad');
}
// PC端处理
if(!isMobile()){
wid = 800;
if(docEl.hasAttribute('data-adapter')){
docEl.removeAttribute('data-adapter');
}
}
var rem = wid / 10;
docEl.style.fontSize = rem + 'px';
// 因系统字体大小被设置调整(不是标准的)导致部分Android机型的根px不等于设置的px，进而rem产生误差的hack处理
var realitySize = parseFloat(win.getComputedStyle(docEl).fontSize);
rem = rem * rem / realitySize;
docEl.style.fontSize = rem + 'px';
lib.rem = rem;
}
// 初始化视口参数
lib.dpr = dpr;
docEl.setAttribute('data-dpr', dpr);
lib.refreshRem = refreshRem;
refreshRem();
win.addEventListener('resize', function(){
clearTimeout(tid);
tid = setTimeout(refreshRem, 240);
}, false);
win.addEventListener('pageshow', function(e){
// 浏览器前进后退的时候重新计算
if(e.persisted || (win.performance && win.performance.navigation.type === 2)){
clearTimeout(tid);
tid = setTimeout(refreshRem, 240);
}
}, false);
lib.rem2px = function(d){
var val = parseFloat(d) * this.rem;
if(typeof d === 'string' && d.match(/rem$/)){
val += 'px';
}
return val;
}
lib.px2rem = function(d){
var val = parseFloat(d) / this.rem;
if(typeof d === 'string' && d.match(/px$/)){
val += 'rem';
}
return val;
}
})(window, window['mFlexible'] || (window['mFlexible'] = {}));
