1 var Renren = Renren || {};
  2 if(!Renren.share){
  3 Renren.share = function() {
  4     var isIE = navigator.userAgent.match(/(msie) ([\w.]+)/i);
  5     var hl = location.href.indexOf('#');
  6     var resUrl = (hl == -1 ? location.href : location.href.substr(0, hl));
  7     var shareImgs = "";
  8     var sl = function(str) {
  9         var placeholder = new Array(23).join('x');
 10         str = str
 11                 .replace(
 12                         /(https?|ftp|gopher|telnet|prospero|wais|nntp){1}:\/\/\w*[\u4E00-\u9FA5]*((?![\"| |\t|\r|\n]).)+/ig,
 13                         function(match) {
 14                             return placeholder + match.substr(171);
 15                         }).replace(/[^\u0000-\u00ff]/g, "xx");
 16         return Math.ceil(str.length / 2);
 17     };
 18     var cssImport = function(){
 19         var static_url = 'http://xnimg.cn/xnapp/share/css/v2/rrshare.css';
 20         var b = document.createElement("link");
 21         b.rel = "stylesheet";
 22         b.type = "text/css";
 23         b.href = static_url;
 24         (document.getElementsByTagName("head")[0] || document.body).appendChild(b)
 25     };
 26     var getShareType = function (dom) {
 27         return dom.getAttribute("type") || "button"
 28     };
 29     var opts = {};
 30     if(typeof(imgMinWidth)!='undefined'){
 31         opts.imgMinWidth = imgMinWidth || 60;
 32     } else {
 33         opts.imgMinWidth = 60;
 34     }
 35     if(typeof(imgMinHeight)!='undefined'){
 36         opts.imgMinHeight = imgMinHeight || 60;
 37     } else {
 38         opts.imgMinHeight = 60;
 39     }
 40     var renderShareButton = function (btn,index) {
 41         if(btn.rendered){
 42             return;
 43         }
 44         btn.paramIndex = index;
 45         var shareType = getShareType(btn).split("_");
 46         var showType = shareType[0] == "icon" ? "icon" : "button";
 47         var size = shareType[1] || "small";
 48         var shs = "xn_share_"+showType+"_"+size;
 49         var innerHtml = [
 50                          '<span class="xn_share_wrapper ',shs,'"></span>'
 51                          ];
 52         btn.innerHTML = innerHtml.join("");
 53         btn.rendered = true;
 54     };
 55     var postTarget = function(opts) {
 56         var form = document.createElement('form');
 57         form.action = opts.url;
 58         form.target = opts.target;
 59         form.method = 'POST';
 60         form.acceptCharset = "UTF-8";
 61         for (var key in opts.params) {
 62             var val = opts.params[key];
 63             if (val !== null && val !== undefined) {
 64                 var input = document.createElement('textarea');
 65                 input.name = key;
 66                 input.value = val;
 67                 form.appendChild(input);
 68             }
 69         }
 70         var hidR = document.getElementById('renren-root-hidden');
 71         if (!hidR) {
 72             hidR = document.createElement('div'), syl = hidR.style;
 73             syl.positon = 'absolute';
 74             syl.top = '-10000px';
 75             syl.width = syl.height = '0px';
 76             hidR.id = 'renren-root-hidden';
 77             (document.body || document.getElementsByTagName('body')[0])
 78                     .appendChild(hidR);
 79         }
 80         hidR.appendChild(form);
 81         try {
 82             var cst = null;
 83             if (isIE && document.charset.toUpperCase() != 'UTF-8') {
 84                 cst = document.charset;
 85                 document.charset = 'UTF-8';
 86             }
 87             form.submit();
 88         } finally {
 89             form.parentNode.removeChild(form);
 90             if (cst) {
 91                 document.charset = cst;
 92             }
 93         }
 94     };
 95     var getCharSet = function(){
 96         if(document.charset){
 97             return document.charset.toUpperCase();
 98         } else {
 99             var metas = document.getElementsByTagName("meta");
100             for(var i=0;i < metas.length;i++){
101                 var meta = metas[i];
102                 var metaCharset = meta.getAttribute('charset');
103                 if(metaCharset){
104                     return meta.getAttribute('charset');
105                 }
106                 var metaContent = meta.getAttribute('content');
107                 if(metaContent){
108                     var contenxt = metaContent.toLowerCase();
109                     var begin = contenxt.indexOf("charset=");
110                     if(begin!=-1){
111                         var end = contenxt.indexOf(";",begin+"charset=".length);
112                         if(end != -1){
113                             return contenxt.substring(begin+"charset=".length,end);
114                         }
115                         return contenxt.substring(begin+"charset=".length);
116                     }
117                 }
118             }
119         }
120         return '';
121     }
122     var charset = getCharSet();
123     var getParam = function (param){
124         param = param || {};
125         param.api_key = param.api_key || '';
126         param.resourceUrl = param.resourceUrl || resUrl;
127         param.title = param.title || '';
128         param.pic = param.pic || '';
129         param.description = param.description || '';
130         if(resUrl == param.resourceUrl){
131             param.images = param.images || shareImgs;//一般就是当前页面的分享,因此取当前页面的img
132         }
133         param.charset = param.charset || charset || '';
134         return param;
135     }
136     var onclick = function(data) {
137         var submitUrl = 'http://widget.renren.com/dialog/share';
138         var p = getParam(data);
139         var prm = [];
140         for (var i in p) {
141             if (p[i])
142                 prm.push(i + '=' + encodeURIComponent(p[i]));
143         }
144         var url = submitUrl+"?" + prm.join('&'), maxLgh = (isIE
145                 ? 2048
146                 : 4100), wa = 'width=700,height=650,left=0,top=0,resizable=yes,scrollbars=1';
147         if (url.length > maxLgh) {
148             window.open('about:blank', 'fwd', wa);
149             postTarget({
150                 url : submitUrl,
151                 target : 'fwd',
152                 params : p
153             });
154         } else {
155             window.open(url, 'fwd', wa);
156         }
157         return false;
158     };
159     window["rrShareOnclick"] = onclick;
160     var init = function() {
161         if (Renren.share.isReady || document.readyState !== 'complete')
162             return;
163         var imgs = document.getElementsByTagName('img'), imga = [];
164         for (var i = 0; i < imgs.length; i++) {
165             if (imgs[i].width >= opts.imgMinWidth
166                     && imgs[i].height >= opts.imgMinHeight) {
167                 imga.push(imgs[i].src);
168             }
169         }
170         window["rrShareImgs"] = imga;
171         if (imga.length > 0)
172             shareImgs = imga.join('|');
173         if (document.addEventListener) {
174             document.removeEventListener('DOMContentLoaded', init, false);
175         } else {
176             document.detachEvent('onreadystatechange', init);
177         }
178         cssImport();
179         var shareBtn = document.getElementsByName("xn_share");
180         var len = shareBtn?shareBtn.length:0;
181         for (var b = 0; b < len; b++) {
182             var a = shareBtn[b];
183             renderShareButton(a,b);
184         }
185         Renren.share.isReady = true;
186     };
187     if (document.readyState === 'complete') {
188         init();
189     } else if (document.addEventListener) {
190         document.addEventListener('DOMContentLoaded', init, false);
191         window.addEventListener('load', init, false);
192     } else {
193         document.attachEvent('onreadystatechange', init);
194         window.attachEvent('onload', init);
195     }
196 };
197 Renren.share();
198 }