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<!DOCTYPE html>
<html class="theme-next gemini use-motion" lang="zh-CN">
<head><meta name="generator" content="Hexo 3.8.0">
<!-- hexo-inject:begin --><!-- hexo-inject:end --><meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=2">
<meta name="theme-color" content="#222">
<link rel="stylesheet" href="/lib/needsharebutton/needsharebutton.css">
<script src="/lib/pace/pace.min.js?v=1.0.2"></script>
<link rel="stylesheet" href="/lib/pace/pace-theme-bounce.min.css?v=1.0.2">
<link rel="stylesheet" href="/lib/Han/dist/han.min.css?v=3.3">
<link rel="stylesheet" href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2">
<link rel="stylesheet" href="/css/main.css?v=7.0.0">
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=7.0.0">
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<link rel="mask-icon" href="/images/logo.svg?v=7.0.0" color="#222">
<script id="hexo.configurations">
var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Gemini',
version: '7.0.0',
sidebar: {"position":"left","width":300,"display":"post","offset":12,"b2t":true,"scrollpercent":true,"onmobile":false},
fancybox: false,
fastclick: false,
lazyload: true,
tabs: true,
motion: {"enable":true,"async":true,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
algolia: {
applicationID: '',
apiKey: '',
indexName: '',
hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
<meta name="description" content="xixici">
<meta property="og:type" content="website">
<meta property="og:title" content="西西词">
<meta property="og:url" content="http://xixici.com/README.html">
<meta property="og:site_name" content="西西词">
<meta property="og:description" content="xixici">
<meta property="og:locale" content="zh-CN">
<meta property="og:updated_time" content="2019-02-25T03:47:04.504Z">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="西西词">
<meta name="twitter:description" content="xixici">
<link rel="canonical" href="http://xixici.com/README.html">
<script id="page.configurations">
CONFIG.page = {
sidebar: "",
};
</script>
<title> | 西西词</title>
<noscript>
<style>
.use-motion .motion-element,
.use-motion .brand,
.use-motion .menu-item,
.sidebar-inner,
.use-motion .post-block,
.use-motion .pagination,
.use-motion .comments,
.use-motion .post-header,
.use-motion .post-body,
.use-motion .collection-title { opacity: initial; }
.use-motion .logo,
.use-motion .site-title,
.use-motion .site-subtitle {
opacity: initial;
top: initial;
}
.use-motion .logo-line-before i { left: initial; }
.use-motion .logo-line-after i { right: initial; }
</style>
</noscript><!-- hexo-inject:begin --><!-- hexo-inject:end -->
</head>
<body itemscope itemtype="http://schema.org/WebPage" lang="zh-CN">
<!-- hexo-inject:begin --><!-- hexo-inject:end --><div class="container sidebar-position-left page-post-detail">
<div class="headband"></div>
<header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-brand-wrapper">
<div class="site-meta">
<div class="custom-logo-site-title">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<span class="site-title">西西词</span>
<span class="logo-line-after"><i></i></span>
</a>
</div>
<h1 class="site-subtitle" itemprop="description">诗在远方</h1>
</div>
<div class="site-nav-toggle">
<button aria-label="切换导航栏">
<span class="btn-bar"></span>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
</button>
</div>
</div>
<nav class="site-nav">
<ul id="menu" class="menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section"><i class="menu-item-icon fa fa-fw fa-home"></i> <br>首页</a>
</li>
<li class="menu-item menu-item-about">
<a href="/about/" rel="section"><i class="menu-item-icon fa fa-fw fa-user"></i> <br>关于</a>
</li>
<li class="menu-item menu-item-tags">
<a href="/tags/" rel="section"><i class="menu-item-icon fa fa-fw fa-tags"></i> <br>标签<span class="badge">22</span></a>
</li>
<li class="menu-item menu-item-categories">
<a href="/categories/" rel="section"><i class="menu-item-icon fa fa-fw fa-th"></i> <br>分类<span class="badge">7</span></a>
</li>
<li class="menu-item menu-item-archives">
<a href="/archives/" rel="section"><i class="menu-item-icon fa fa-fw fa-archive"></i> <br>归档<span class="badge">41</span></a>
</li>
<li class="menu-item menu-item-search">
<a href="javascript:;" class="popup-trigger">
<i class="menu-item-icon fa fa-search fa-fw"></i> <br>搜索</a>
</li>
</ul>
<div class="site-search">
<div class="popup search-popup local-search-popup">
<div class="local-search-header clearfix">
<span class="search-icon">
<i class="fa fa-search"></i>
</span>
<span class="popup-btn-close">
<i class="fa fa-times-circle"></i>
</span>
<div class="local-search-input-wrapper">
<input autocomplete="off" placeholder="搜索..." spellcheck="false" type="text" id="local-search-input">
</div>
</div>
<div id="local-search-result"></div>
</div>
</div>
</nav>
</div>
</header>
<a href="https://github.com/xixici" class="github-corner" title="Follow me on GitHub" aria-label="Follow me on GitHub" rel="noopener" target="_blank"><svg width="80" height="80" viewbox="0 0 250 250" style="fill: #222; color: #fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"/><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"/><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"/></svg></a>
<main id="main" class="main">
<div class="main-inner">
<div class="content-wrap">
<div id="content" class="content">
<div id="posts" class="posts-expand">
<div class="post-block page">
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
</h2>
<div class="post-meta">
</div>
</header>
<div class="post-body han-init-context">
<h1 id="xixici"><a href="#xixici" class="headerlink" title="xixici"></a>xixici</h1>
</div>
</div>
</div>
</div>
<div class="comments" id="comments">
</div>
</div>
<div class="sidebar-toggle">
<div class="sidebar-toggle-line-wrap">
<span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
</div>
</div>
<aside id="sidebar" class="sidebar">
<div class="sidebar-inner">
<ul class="sidebar-nav motion-element">
<li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap">
文章目录
</li>
<li class="sidebar-nav-overview" data-target="site-overview-wrap">
站点概览
</li>
</ul>
<div class="site-overview-wrap sidebar-panel">
<div class="site-overview">
<div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
<img class="site-author-image" itemprop="image" src="/uploads/avatar.gif" alt="博主">
<p class="site-author-name" itemprop="name">博主</p>
<p class="site-description motion-element" itemprop="description">远方与诗的存在</p>
</div>
<nav class="site-state motion-element">
<div class="site-state-item site-state-posts">
<a href="/archives/">
<span class="site-state-item-count">41</span>
<span class="site-state-item-name">日志</span>
</a>
</div>
<div class="site-state-item site-state-categories">
<a href="/categories/index.html">
<span class="site-state-item-count">7</span>
<span class="site-state-item-name">分类</span>
</a>
</div>
<div class="site-state-item site-state-tags">
<a href="/tags/index.html">
<span class="site-state-item-count">22</span>
<span class="site-state-item-name">标签</span>
</a>
</div>
</nav>
<div class="links-of-author motion-element">
<span class="links-of-author-item">
<a href="https://github.com/xixici" title="GitHub → https://github.com/xixici" rel="noopener" target="_blank"><i class="fa fa-fw fa-github"></i></a>
</span>
<span class="links-of-author-item">
<a href="mailto:[email protected]" title="E-Mail → mailto:[email protected]" rel="noopener" target="_blank"><i class="fa fa-fw fa-envelope"></i></a>
</span>
</div>
<div class="cc-license motion-element" itemprop="license">
<a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" class="cc-opacity" rel="noopener" target="_blank"><img src="/images/cc-by-nc-sa.svg" alt="Creative Commons"></a>
</div>
</div>
</div>
<!--noindex-->
<div class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
<div class="post-toc">
<div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#xixici"><span class="nav-number">1.</span> <span class="nav-text">xixici</span></a></li></ol></div>
</div>
</div>
<!--/noindex-->
<div class="back-to-top">
<i class="fa fa-arrow-up"></i>
<span id="scrollpercent"><span>0</span>%</span>
</div>
</div>
</aside>
</div>
</main>
<footer id="footer" class="footer">
<div class="footer-inner">
<div class="copyright">© 2015 – <span itemprop="copyrightYear">2019</span>
<span class="with-love" id="animate">
<i class="fa fa-heart"></i>
</span>
<span class="author" itemprop="copyrightHolder">博主</span>
</div>
<div class="powered-by">由 <a href="https://hexo.io" class="theme-link" rel="noopener" target="_blank">Hexo</a> 强力驱动 - Hosted by <a href="https://pages.coding.me" style="font-weight: bold">Coding Pages</a> v3.8.0</div>
<span class="post-meta-divider">|</span>
<div class="theme-info">主题 – <a href="https://theme-next.org" class="theme-link" rel="noopener" target="_blank">NexT.Gemini</a> v7.0.0</div>
<div class="busuanzi-count">
<script async src="https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script>
<span class="post-meta-item-icon">
<i class="fa fa-user"></i>
</span>
<span class="site-uv" title="总访客量">
<span class="busuanzi-value" id="busuanzi_value_site_uv"></span>
</span>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-eye"></i>
</span>
<span class="site-pv" title="总访问量">
<span class="busuanzi-value" id="busuanzi_value_site_pv"></span>
</span>
</div>
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<div id="needsharebutton-float">
<span class="btn">
<i class="fa fa-share-alt" aria-hidden="true"></i>
</span>
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<script>
if (Object.prototype.toString.call(window.Promise) !== '[object Function]') {
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<script>
var GUEST = ['nick', 'mail', 'link'];
var guest = 'nick,mail,link';
guest = guest.split(',').filter(function(item) {
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placeholder: 'Talk Something...',
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meta: guest,
pageSize: '10' || 10,
visitor: false
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// Popup Window;
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var isXml = true;
// Search DB path;
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search_path = "search.xml";
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isXml = false;
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var path = "/" + search_path;
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$('.popup').hide();
$('#local-search-input').val('');
$('.search-result-list').remove();
$('#no-result').remove();
$(".local-search-pop-overlay").remove();
$('body').css('overflow', '');
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function proceedsearch() {
$("body")
.append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
.css('overflow', 'hidden');
$('.search-popup-overlay').click(onPopupClose);
$('.popup').toggle();
var $localSearchInput = $('#local-search-input');
$localSearchInput.attr("autocapitalize", "none");
$localSearchInput.attr("autocorrect", "off");
$localSearchInput.focus();
}
// search function;
var searchFunc = function(path, search_id, content_id) {
'use strict';
// start loading animation
$("body")
.append('<div class="search-popup-overlay local-search-pop-overlay">' +
'<div id="search-loading-icon">' +
'<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
'</div>' +
'</div>')
.css('overflow', 'hidden');
$("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');
$.ajax({
url: path,
dataType: isXml ? "xml" : "json",
async: true,
success: function(res) {
// get the contents from search data
isfetched = true;
$('.popup').detach().appendTo('.header-inner');
var datas = isXml ? $("entry", res).map(function() {
return {
title: $("title", this).text(),
content: $("content",this).text(),
url: $("url" , this).text()
};
}).get() : res;
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var resultContent = document.getElementById(content_id);
var inputEventFunction = function() {
var searchText = input.value.trim().toLowerCase();
var keywords = searchText.split(/[\s\-]+/);
if (keywords.length > 1) {
keywords.push(searchText);
}
var resultItems = [];
if (searchText.length > 0) {
// perform local searching
datas.forEach(function(data) {
var isMatch = false;
var hitCount = 0;
var searchTextCount = 0;
var title = data.title.trim();
var titleInLowerCase = title.toLowerCase();
var content = data.content.trim().replace(/<[^>]+>/g,"");
var contentInLowerCase = content.toLowerCase();
var articleUrl = decodeURIComponent(data.url).replace(/\/{2,}/g, '/');
var indexOfTitle = [];
var indexOfContent = [];
// only match articles with not empty titles
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keywords.forEach(function(keyword) {
function getIndexByWord(word, text, caseSensitive) {
var wordLen = word.length;
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return [];
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text = text.toLowerCase();
word = word.toLowerCase();
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startPosition = position + wordLen;
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return index;
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indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
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return itemRight.position - itemLeft.position;
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return itemLeft.word.length - itemRight.word.length;
}
});
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var item = index[index.length - 1];
var position = item.position;
var word = item.word;
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while (position + word.length <= end && index.length != 0) {
if (word === searchText) {
searchTextCountInSlice++;
}
hits.push({position: position, length: word.length});
var wordEnd = position + word.length;
// move to next position of hit
index.pop();
while (index.length != 0) {
item = index[index.length - 1];
position = item.position;
word = item.word;
if (wordEnd > position) {
index.pop();
} else {
break;
}
}
}
searchTextCount += searchTextCountInSlice;
return {
hits: hits,
start: start,
end: end,
searchTextCount: searchTextCountInSlice
};
}
var slicesOfTitle = [];
if (indexOfTitle.length != 0) {
slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
}
var slicesOfContent = [];
while (indexOfContent.length != 0) {
var item = indexOfContent[indexOfContent.length - 1];
var position = item.position;
var word = item.word;
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start = 0;
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end = position + word.length;
}
if(end > content.length){
end = content.length;
}
slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
}
// sort slices in content by search text's count and hits' count
slicesOfContent.sort(function (sliceLeft, sliceRight) {
if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
return sliceRight.searchTextCount - sliceLeft.searchTextCount;
} else if (sliceLeft.hits.length !== sliceRight.hits.length) {
return sliceRight.hits.length - sliceLeft.hits.length;
} else {
return sliceLeft.start - sliceRight.start;
}
});
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if (upperBound >= 0) {
slicesOfContent = slicesOfContent.slice(0, upperBound);
}
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var result = '';
var prevEnd = slice.start;
slice.hits.forEach(function (hit) {
result += text.substring(prevEnd, hit.position);
var end = hit.position + hit.length;
result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
prevEnd = end;
});
result += text.substring(prevEnd, slice.end);
return result;
}
var resultItem = '';
if (slicesOfTitle.length != 0) {
resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
} else {
resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
}
slicesOfContent.forEach(function (slice) {
resultItem += "<a href='" + articleUrl + "'>" +
"<p class=\"search-result\">" + highlightKeyword(content, slice) +
"...</p>" + "</a>";
});
resultItem += "</li>";
resultItems.push({
item: resultItem,
searchTextCount: searchTextCount,
hitCount: hitCount,
id: resultItems.length
});
}
})
};
if (keywords.length === 1 && keywords[0] === "") {
resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x"></i></div>'
} else if (resultItems.length === 0) {
resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x"></i></div>'
} else {
resultItems.sort(function (resultLeft, resultRight) {
if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
return resultRight.searchTextCount - resultLeft.searchTextCount;
} else if (resultLeft.hitCount !== resultRight.hitCount) {
return resultRight.hitCount - resultLeft.hitCount;
} else {
return resultRight.id - resultLeft.id;
}
});
var searchResultList = '<ul class=\"search-result-list\">';
resultItems.forEach(function (result) {
searchResultList += result.item;
})
searchResultList += "</ul>";
resultContent.innerHTML = searchResultList;
}
}
if ('auto' === 'auto') {
input.addEventListener('input', inputEventFunction);
} else {
$('.search-icon').click(inputEventFunction);
input.addEventListener('keypress', function (event) {
if (event.keyCode === 13) {
inputEventFunction();
}
});
}
// remove loading animation
$(".local-search-pop-overlay").remove();
$('body').css('overflow', '');
proceedsearch();
}
});
}
// handle and trigger popup window;
$('.popup-trigger').click(function(e) {
e.stopPropagation();
if (isfetched === false) {
searchFunc(path, 'local-search-input', 'local-search-result');
} else {
proceedsearch();
};
});
$('.popup-btn-close').click(onPopupClose);
$('.popup').click(function(e){
e.stopPropagation();
});
$(document).on('keyup', function (event) {
var shouldDismissSearchPopup = event.which === 27 &&
$('.search-popup').is(':visible');
if (shouldDismissSearchPopup) {
onPopupClose();
}
});
</script>
<script>
(function(){
var bp = document.createElement('script');
var curProtocol = window.location.protocol.split(':')[0];
if (curProtocol === 'https') {
bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
}
else {
bp.src = 'http://push.zhanzhang.baidu.com/push.js';
}
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(bp, s);
})();
</script>
<script src="/lib/needsharebutton/needsharebutton.js"></script>
<script>
pbOptions = {};
pbOptions.iconStyle = "default";
pbOptions.boxForm = "horizontal";
pbOptions.position = "bottomCenter";
pbOptions.networks = "Weibo,Wechat,Douban,QQZone,Twitter,Linkedin,Mailto,Pinterest,Facebook,Tumblr,GoogleBookmarks,Evernote";
new needShareButton('#needsharebutton-postbottom', pbOptions);
flOptions = {};
flOptions.iconStyle = "default";
flOptions.boxForm = "horizontal";
flOptions.position = "middleRight";
flOptions.networks = "Weibo,Wechat,Douban,QQZone,Twitter,Linkedin,Mailto,Pinterest,Facebook,Tumblr,GoogleBookmarks,Evernote";
new needShareButton('#needsharebutton-float', flOptions);
</script>
<script src="/lib/pangu/dist/pangu.min.js?v=3.3"></script>
<script>pangu.spacingPage();</script>
<script src="/js/src/js.cookie.js?v=7.0.0"></script>
<script src="/js/src/scroll-cookie.js?v=7.0.0"></script>
<style>
.copy-btn {
display: inline-block;
padding: 6px 12px;
font-size: 13px;
font-weight: 700;
line-height: 20px;
color: #333;
white-space: nowrap;
vertical-align: middle;
cursor: pointer;
background-color: #eee;
background-image: linear-gradient(#fcfcfc, #eee);
border: 1px solid #d5d5d5;
border-radius: 3px;
user-select: none;
outline: 0;
}
.highlight-wrap .copy-btn {
transition: opacity .3s ease-in-out;
opacity: 0;
padding: 2px 6px;
position: absolute;
right: 4px;
top: 8px;
}
.highlight-wrap:hover .copy-btn,
.highlight-wrap .copy-btn:focus {
opacity: 1
}
.highlight-wrap {
position: relative;
}
</style>
<script>
$('.highlight').each(function(i, e) {
var $wrap = $('<div>').addClass('highlight-wrap');
$(e).after($wrap);
$wrap.append($('<button>').addClass('copy-btn').append('复制').on('click', function(e) {
var code = $(this).parent().find('.code').find('.line').map(function(i, e) {
return $(e).text();
}).toArray().join('\n');
var ta = document.createElement('textarea');
var range = document.createRange(); //For Chrome
var sel = window.getSelection(); //For Chrome
var yPosition = window.pageYOffset || document.documentElement.scrollTop;
ta.style.top = yPosition + 'px'; //Prevent page scroll
ta.style.position = 'absolute';
ta.style.opacity = '0';
ta.value = code;
ta.textContent = code; //For FireFox
ta.contentEditable = true;
ta.readOnly = false;
document.body.appendChild(ta);
range.selectNode(ta);
sel.removeAllRanges();
sel.addRange(range);
ta.setSelectionRange(0, code.length);
var result = document.execCommand('copy');
if (result) $(this).text('复制成功');
else $(this).text('复制失败');
ta.blur(); //For iOS
$(this).blur();
})).on('mouseleave', function(e) {
var $b = $(this).find('.copy-btn');
setTimeout(function() {
$b.text('复制');
}, 300);
}).append(e);
})
</script><!-- hexo-inject:begin --><!-- Begin: Injected MathJax -->
<script type="text/x-mathjax-config">
MathJax.Hub.Config({"tex2jax":{"inlineMath":[["$","$"],["\\(","\\)"]],"skipTags":["script","noscript","style","textarea","pre","code"],"processEscapes":true},"TeX":{"equationNumbers":{"autoNumber":"AMS"}}});
</script>
<script type="text/x-mathjax-config">
MathJax.Hub.Queue(function() {
var all = MathJax.Hub.getAllJax(), i;
for(i=0; i < all.length; i += 1) {
all[i].SourceElement().parentNode.className += ' has-jax';
}
});
</script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js">
</script>
<!-- End: Injected MathJax -->
<!-- hexo-inject:end -->
</body>
</html>
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